CSIR-Central Leather Research Institute
Dr.K.J Sreeram
Director
Academic Qualifications
    Ph.D
Contact Details
Dr.K.J Sreeram
Director
& Head
CLRI-Centre for Analysis, Testing, Evaluation& Reporting Services(CLRI-CATERS), Director's Office
CSIR-Central Leather Research Institute
Adyar, Chennai – 600 020
e-mail: director@clri.res.in,
Phone:91 44 24910897


Dr KJ Sreeram is a Senior Principal Scientist and Head of the testing services of CSIR-CLRI since 2016. He has been associated with the institute as a scientist since 2002 and has been involved in research activities such as better management of chromium, development of benign leather auxiliaries, rare based pigments etc. His current research interest is in sustainable leather manufacturing, imbibing the knowledge generated through advanced technologies such as nanotechnology.

Apart from a range of projects that he has led, Dr Sreeram is currently involved in translational research, where laboratory scale products are tuned for adoption at industrial scales. A highly committed researcher, Dr Sreeram has about 100 publications in peer reviewed journals, 19 published patents, 13 commercialized technologies to his credit. For his contributions to S&T relating to the management of chromium in chromite ore industries he was awarded the CSIR Young Scientist Award in 2004 and for his contributions to the use of functionalized nanoparticles for collagen stabilization, the IUR Research recognition by IULTCS in 2014.

He has authored the Technology Roadmap 2035 for the leather sector under the manufacturing sector roadmap brought out by TIFAC DST in 2017.

He is an elected Fellow of the Society of Leather Technologists and Chemists, UK and the Royal Society of Chemistry UK.

Current area of interest is the application of material science and nanotechnology to bring about sustainable value addition to leather. The group’s focus for research is towards finding answers to the following questions:

  • How effectively can we utilize widely available natural resources such as plant polyphenols found in nature as well as in wastes (such as lignin from black liquor of paper industry) for synthesis of engineered nanomaterials?
  • Can engineered nanomaterials have improved diffusion of chemicals into the skin matrix and thus be able to bind better at a shorter duration of time than conventional chemicals?
  • Can these engineered nanomaterials be multifunctional, so as to impart customer desired features on leather and leather products?
  • Can we understand the surface of leather better, so as to develop one-pot products that can provide customer desired features in a single go?

Educational Qualifications

Sl. No

Degree/Certificate

Year of Passing

University/Institute

Subjects

1

Bachelor of Technology

1994

Anna University

Leather Technology

2

Master of Technology

1996

Anna University

Leather Technology

3

Doctor of Philosophy

2000

Anna University

Leather Technology

 

Academic/Research Experience/Employment

Sl. No

From

To

Name of Organization

Position Held

1

2000

2002

CSIR-CLRI

Research Associate

2

13.3.2002

12.3.2006

CSIR-CLRI

Scientist C

3

13.3.2006

12.3.2010

CSIR-CLRI

Scientist EI

3

13.3.2010

12.3.2014

CSIR-CLRI

Principal Scientist

3

13.3.2014

Till Date

CSIR-CLRI

Sr. Principal Scientist

 

Area of Specialization

  • Leather Science (Sustainable Chemistry – Nanoscience – Leather Auxiliaries – Analytical techniques

 

Professional Affiliations

  • Royal Society of Chemistry, UK - FRSC/li>
  • Society of Leather Technologists and Chemists, UK - FSLTC/li>
  • Indian Leather Technologists Association, India - Vice President/li>
  • Material Research Society of India, India/li>
  • Chemical Research Society of India, India/li>
  • Indian Science Congress Association, India/li>
  • Vijnana Bharathi (VIBHA), India/li>

 

Current Responsibilities

  • Quality Manager and Technical Facility Manager, Centre For Analysis, Testing, Evaluation and Reporting Services, CLRI
  • Secretary, Research Council CLRI
  • Honorary Faculty, Anna University and AcSIR
List of Research Publications

Metrics Related to Publications

Number of Papers: 96

Aggregate Impact Factor: 227.67

IF/Paper: 2.47

H-index: 22

Total Citations (without self-citations): 1403

Total Cover Page Articles: 2

 

Sl.No

Authors

Article Title

 

Journal or Magazine Article Title

Journal or Magazine Volume Number and Date

Pages

IF (2018)

Citations

1.         

Murugappan, G; Khambhaty, Y; Sreeram, K.J.;

Protease immobilized nanoparticles: a cleaner and sustainable approach to dehairing of skin

 

Applied Nanoscience

Just accepted

-

3.198

-

2.         

Sahu, B; Alla , J.P; Rao J.R, Sreeram, K.J.; Jayakumar, G. C;

Neoteric Oxidizing Agent for Chamois Process

 

Journal of the American Leather Chemists Association

Just accepted

-

0.7

-

3.         

Vedhanayagam, M; Nair B.U; Sreeram, K.J.;

Dimension effect: Dendrimer functionalized carbon based nanomaterial mediated collagen scaffold for wound healing application

Materialia

7,2019

100354

-

-

4.         

Madhumitha, D; Bruntha, A; Vaidyanathan, V; Gari, BNR.; Sreeram, K.J.; Dhathathreyan, A;

Elastic compliance as a tool to understand Hofmeister ion specific effect in DMPC liposomes

Biophysical Chemistry

249, 2019

106148

1.870

0

5.         

Vedhanayagam, M; Mohan, R; Nair B.U.; Sreeram K.J.;

Effect of functionalized gold nanoparticle on collagen stabilization for tissue engineering application

International Journal Of Biological Macromolecules 

123,2019

1211-1220

3.909

0

6.         

Vedhanayagam, M; Mohan, R; Nair B.U.; Sreeram K.J.;

Collagen-ZnO Scaffolds for Wound Healing Applications: Role of Dendrimer Functionalization and Nanoparticle Morphology

ACS Applied Biomaterials

1(6), 2018

1942-1958

-

0

7.         

Khambhaty, Y Akshaya, R; Suganya, CR; Sreeram, K.J.; Rao, JR;

A logical and sustainable approach towards bamboo pulp bleaching using xylanase from Aspergillus nidulans

International Journal Of Biological Macromolecules 

118,2018

452-459

3.909

1

8.         

Tamilmani, V; Soni, A.K. Rai, V.K.; Nair, B.U.; Sreeram, K.J.;

Frequency upconversion in catechin assisted  square nanoplates

Journal Of Chemical Sciences

129,

2017

1929-1940

1.254

2

9.         

Tamilmani, V; Nair, B. U; Sreeram, KJ;

Phosphate modulated luminescence in lanthanum vanadate nanorods- Catechin, polyphenolic ligand

Journal of Solid State Chemistry

252, 2017

158-168

2.179

0

10.      

Vedhanayagam, M; Nidhin, M  Duraipandy, N; Naresh, N. D; Jaganathan, G; Ranganathan, M; Kiran, M. S; Narayan, S; Nair, B.U; Sreeram, K.J;

Role Of Nanoparticle Size in Self-Assemble Processes of Collagen for Tissue Engineering Application

International Journal of Biological Macromolecules

99,2017

655-664

3.909

1

11.      

Tamilmani, V;  Kumari, A; Rai, V. K; Nair, B. U; Sreeram, K. J;

Bright Green Frequency Upconversion in Catechin Based Yb3+/Er3+ Codoped LaVO4 Nanorods upon 980 nm Excitation

Journal of Physical Chemistry C

121, 2017

4505-4516

4.484

12

12.      

Tamilmani, V; Duraipandy, N;  Kiran, M. S;  Nair, B. U; Sreeram, K. J;

Catechin caged lanthanum orthovanadate nanorods for nuclear targeting and bioimaging applications

Sensors and Actuators B: Chemical

242, 2017

700-709

5.667

11

13.      

Gari, B. N. R; Fessehaye, S; Aravindhan, R; Sreeram, K. J; Rao, J. R; Nair, B. U;

Use of Ternary Solvent (Water - Ethanol - Ethyl Acetate) Medium for Leather Processing: A Possible Paradigm Change

Journal of the American Leather Chemists Association

111, 2016

250-258

0.7

3

14.      

Sathya, R; Sreeram, K. J; Rao, J. R; Nair B.U.

 

Organic Nanocolorants: Self-Fixed, Optothermal Resistive, Silica-Supported Dyes for Sustainable Dyeing of Leather

ACS Sustainable Chemistry and Engineering

4, 2016

2706-2714

6.140

6

15.      

Tamilmani, V; Saraswathy, A ; Ramapurath, JS; Sreeram, KJ; Nair, BU;

Catechin tuned magnetism of Gd-doped orthovanadate through morphology as T-1-T-2 MRI contrast agents

Scientific reports

6,2016

 

4.122

6

16.      

Murugappan, G; Zakir, M.J.A; Jayakumar, G. C; Khambhaty, Y; Sreeram, KJ; Rao, JR;

A Novel Approach to Enzymatic Unhairing and Fiber Opening of Skin Using Enzymes Immobilized on Magnetite Nanoparticles

ACS Sustainable Chemistry and Engineering

4, 2016

828-834

6.140

5

17.      

Sathish, M; Sreeram, K.J; Rao, J.R; Nair, BU;

Cyclic carbonate: a recyclable medium for zero discharge tanning

ACS Sustainable Chemistry and Engineering

4, 2016

1032-1040

6.140

12

18.      

Sathish, M; Azhar, Zakir, M.J.A; Aravindhan, R; Sreeram, K.J; Rao, JR;

Development of aluminum-melamine formulation for retanning application

Journal of American Leather Chemists Association

111, 2016

44-52

0.7

1

19.      

Sathish, M; Madhan, B;Sreeram, K.J;

Rao, J.R; Nair, B.U.

Alternative carrier medium for sustainable leather manufacturing – a review and perspective

Journal of Cleaner Production

1, 2016

49-58

5.651

8

20.      

Vedhanayagam, M; Mohan, R; Nair B.U; Sreeram K.J.

Nanorod mediated collagen scaffolds as extra cellular matrix mimics

Biomedical materials

10, 2015

065010

2.897

2

21.      

Yasmin, KSwetha, A;

Sreeram, K.J; Rao, J.R; Nair, B.U.

 

Dual utility of a novel, copper enhanced laccase fromTrichoderma aureoviridae

International Journal of Biological Macromolecules

81, 2015

69-75

3.909

3

22.      

Bhargavi NR, Venkatesh M, KJ Sreeram, Geetha B, JR Rao, BU Nair, AB Mandal,

Emulsifiers-Free Lubrication Process using Natural Oils Dispersions in Non-Aqueous Solvents for Leather

RSC Advances

5,2015

68981-68990

2.939

1

23.      

Balasubramanian, P; M. Azhar ZakirR. AravindhanK; SreeramK.J; Rao, J.R; Nair, B.U.

Chrome-melamine syntan: a step towards developing fuller leather

Journal of American Leather Chemists Association

110, 2015

332-337

0.7

0

24.      

Mohammad Jamal Azhar Zakir, Sathya, R;

Balasubramanian, P;

Aravindhan R; Sreeram, K.J;  Rao, J.R; Nair, B.U.

Innovative material from paper and pulp industry for leather processing

 

Journal of Cleaner Production

104, 2015

436-444

5.651

4

25.      

Jayakumar, G.C; Sangeetha, S ; Sreeram, K.J; Rao, J.R; Nair, B.U.

Metal organic based syntan for multi-stage leather processing

Journal of American Leather Chemists Association

110, 2015

288-294

0.7

0

26.      

Tamilmani, V.; kaadasan, D.; Muthazhagan, R.; Sreeram, K.J.; Rao, J.R; Nair, B.U.

Thermochromism for smart leathers

Journal of American Leather Chemists Association

6, 2015

97-102

0.7

1

27.      

Vedhanayagam, M; Teddy, T.K; Sreeram, K.J; Rao, J.R; Nair, B.U.]

 

Value added leather auxiliaries from paper and pulp industry waste

Journal of American Leather Chemists Association

110, 2015

295-301

0.7

1

28.      

Tamilmani, V; Sreeram, K.J ; Nair, B.U.

Catechin assisted phase and shape selection for luminescent LaVO4 zircon

RSC Advances

9, 2015

82513-82523

2.939

12

29.      

Dangew, N; Punitha, V; Sreeram K.J; Nair, B.U.

An assessment of differences between butt and belly regions of Indian sheep skin

Journal of American Leather Chemists Association

6, 2015

165-176

0.7

1

30.      

Bhargavi, N.R.G; Jayakumar, G.C; Sreeram, K.J; Rao, J.R; Nair, B.U.

Towards sustainable leather production: vegetable tanning in non-aqueous medium

Journal of American Leather Chemists Association

4, 2015

97-102

0.7

2

31.      

Sathya, R; Sreeram, K.J; Rao, J.R; Nair, B.U.

Hybrid composites: amalgamation of proteins with polymeric phenols as multifunctional material for leather processing

RSC Advances

5, 2015

33221-33232

2.939

4

32.      

Aswathy K;  Sangeetha S;  Nidhin M;  Sreeram, KJ  Nishad Fathima Nishter

Collagen-nanoparticle Interactions: Type I Collagen Stabilization Using Functionalized Nanoparticles

 

Soft materials

2, 2015

59-65

0.62

11

33.      

Kumar, M; Velmurugan, P; Sreeram, K. J; Rao, J. R; Nair, B. U.

Reuse of solid waste from juice industry (citrus sinensis peel) in the extraction of antioxidants with enhanced activity through polymer encapsulates for the preservation of skin

Journal of American Leather Chemists Association

109, 2014

231-238

0.7

1

34.      

Nidhin, M; Vedhanayagam, M; Sangeetha, S; Kiran, M. S.; Nazeer, S. S.; Jayasree, R. S.; Sreeram, K. J ; Nair B. U.

 

Fluorescent nanonetworks: A novel bioalley for collagen scaffolds and Tissue Engineering

Scientific Reports

4, 2014

5968

4.122

12

35.      

Radhika, S. P; Jayakumar,G. C.; Sreeram, K. J; Nair, B. U.

Unique rare earth pigments for more thermally comfortable leathers

Journal of American Leather Chemists Association

109, 2014

224-230

0.7

0

36.      

Nidhin, M; Aravindhan, R; Sreeram, K. J.

Green synthesis of monodispersed iron oxide nanoparticles for leather finishing

Journal of American Leather Chemists Association

109, 2014

184-188

0.7

1

37.      

Radhika, S.P; Sreeram, K.J; Nair, B. U.

Mo-doped cerium gadolinium oxide as environmentally sustainable yellow pigments

ACS Sustainable Chemistry and Engineering

2, 2014

1251-1256

6.140

10

38.      

Aravindhan, R; Sreeram, K.J;  Rao J. R.

Development of alginate-chitosan based biopolymers for leather retanning

Journal of American Leather Chemists Association

109, 2014

99-109

0.7

6

39.      

Radhika, S.P; Sreeram, K.J; Nair, B. U.

Effective synthesis route for red-brown pigments based on Ce-Pr-Fe-O and their potential application for near infrared reflective surface coating 

Journal of Chemical Sciences

126, 2014

2014

1.254

9

40.      

Tamilmani, V; Sreeram, K.J; Nair, B.U.

Tuned synthesis of doped rare-earth orthovanadates for enhanced luminescence

RSC Advances

4, 2014

4260-4268

2.939

9

41.      

Sindhu, K; Rajaram, A; Sreeram, K. J.; Rajaram, R

Curcumin conjugated gold nanoparticle synthesis and its biocompatibility

RSC Advances

4, 2014

1808-1818

2.939

45

42.      

Radhika, S.P; Sreeram, KJ; Nair , B. U.

Mo-doped cerium gadolinium oxide as environmentally sustainable yellow pigments

ACS Sustainable Chemistry and Engineering

2, 2014

1251-1256

6.140

10

43.      

Usha, R; Sreeram, K.J.; Mandal, A.B.

Organization of collagen in the presence of diphenyl phosphoryl azide (DPPA): An in vitro study.

Colloids and surfaces. B, Biointerfaces

109, 2013

121-128

3.997

8

44.      

Nidhin, M; Nazeer, S.S; Jayasree, R.S; Kiran, M.S.; Nair, B.U; Sreeram, K.J.

Flower shaped assembly of cobalt ferrite nanoparticles: application as T-2 contrast agent in MRI

RSC Advances

3, 2013

6906-6912

2.939

21

45.      

Radhika, S.P; Sreeram, KJ; Nair, B. U.

Rare earth doped cobalt aluminate blue as an environmentally benign colorant

Journal of advanced ceramics

1,2012

301-309

1.254

8

46.      

Sangeetha, S; Usha, R; Sreeram, KJ; Nair, BU

Enhancing collagen stability through nanostructures containing chromium(III) oxide

Colloids and surfaces. B, Biointerfaces

100, 2012

36-41

3.997

17

47.      

Sangeetha, S.; Basha, R.; Sreeram, K.J.; Sangalimuthu, S. N.; Nair, B. U.

Functional pigments from chromium(III) oxide nanoparticles

Dyes and Pigments

94, 2012

548-552

3.767

37

48.      

Sangeetha, S.; Fathima, N.N.; Sreeram, K.J.; Rao, J.R.; Nair, B.U.

Stimuli responsive leathers using smart retanning agents

Journal of American Leather Chemists Association

107, 2012

196-204

0.7

4

49.      

Nidhin, M.; Sreeram, K.J.; Nair, B.U.

Polysaccharide films as templates in the synthesis of hematite nanostructures with special properties

Applied Surface Science

258, 2012

5179-5184

4.439

10

50.      

Nidhin, M.; Sreeram, K.J.; Nair, B.U

Green synthesis of rock salt CoO nanoparticles for coating applications by complexation and surface passivation with starch

Chemical Engineering Journal

185, 2012

352-357

6.735

9

51.      

Usha, R.; Sreeram, K.J.; Rajaram, A.

Stabilization of collagen with EDC/NHS in the presence of L-lysine: A comprehensive study

Colloids and surfaces. B, Biointerfaces

90, 2012

83-90

3.997

39

52.      

Sreeram, K.J.; Nidhin, M.; Nair, B.U.

Formation of necklace-shaped haematite Nano constructs through polyethylene glycol sacrificial template technique

Journal of Experimental Nanoscience

7, 2012

399-411

1.362

2

53.      

Sreeram, K.J.; Rao, J.R.; Nair, B.U.

Chromium(III) pigments: use of leather wastes as alternative starting material

Journal of American Leather Chemists Association

106, 2011

219-225

0.7

5

54.      

Kumar, M.P.; Aravindhan, R.; Sreeram, K. J.; Rao, J. R.; Nair, B.U.

Green chemistry approach in leather processing: a case of chrome tanning

Journal of American Leather Chemists Association

106, 2011

113-120

0.7

4

55.      

Sindhu, K.; Indra, R.; Rajaram, A. Sreeram, K. J.; Rajaram, R.

Investigations on the Interaction of Gold-Curcumin Nanoparticles with Human Peripheral Blood Lymphocytes

Journal of Biomedical Nanotechnology

7, 2011

56-56

1.86

35

56.      

Sreeram, K. J.; Aravindhan, R.; Rao, J. R.; Nair, B. U.

Development of natural garment leathers: a metal-free approach

Journal of American Leather Chemists Association

105, 2010

401-409

0.7

2

57.      

Sreeram, K. J.; Narayan, S.; Abbineni, G.; Hayhurst, A.; Mao, C. B.

Architectonics of Phage-Liposome Nanowebs as Optimized Photosensitizer Vehicles for Photodynamic Cancer Therapy

Molecular Cancer Therapeutics

9, 2010

2524-2535

5.365

7

58.      

Aravindhan, R.; Maharshi, B.; Sreeram, K. J.; Rao, J. R.; Nair, B. U.

Biosorption of cadmium metal ion from simulated wastewaters using Hypnea valentiae biomass: A kinetic and thermodynamic study

Bioresource Technology

101, 2010

1466-1470

5.807

101

59.      

Indumathy, R.; Sreeram, K.J.; Sriranjini, M.; Aby, C.P.; Nair, B. U

Bifunctional role of thiosalicylic acid in the synthesis of silver nanoparticles

Material science and applications

1, 2010

272-278

0.29

 

60.      

Sreeram, K. J.; Nidhin, M.; Nair, B. U.

Synthesis of aligned hematite nanoparticles on chitosan-alginate films

Colloids and surfaces. B, Biointerfaces

71, 2009

260-267

3.99

21

61.      

Nataraj, R.; Aravindhan, R.; Sreeram, K. J.; Rao, J. R.; Nair, B. U.

Studies on the development of a multi-functional syntan

Journal of American Leather Chemists Association

104, 2009

251-260

0.7

5

62.      

Dhayalan, K.; Aravindhan, R.; Sreeram, K. J.; Rao, J. R

Application of rare earth salts for permanent stabilization of skin

Journal of American Leather Chemists Association

68, 2009

135-139

0.7

0

 

 

63.      

Sreeram, K. J.; Nidhin, M.; Nair, B. U.

Microwave assisted template synthesis of silver nanoparticles

Bulletin of Materials Science

31, 2008

937-942

0.87

 

88

64.      

Sreeram, K. J.; Aby, C. P.; Nair, B. U.; Ramasami, T.

Colored cool colorants based on rare earth metal ions

Solar Energy Materials and Solar Cells

92, 2008

1462-1467

4.784

50

65.      

Sreeram, K. J.; Aby, C. P.; Nair, B. U

Synthesis and Characterization of Doped Rare Earth Oxides for Environmentally Benign Nontoxic Reddish-yellow Pigments

Chemistry Letters

37, 2008

902-903

1.625

8

66.      

Nidhin, M.; Indumathy, R.; Sreeram, K. J.; Nair, B. U

Synthesis of iron oxide nanoparticles of narrow size distribution on polysaccharide templates

Bulletin of Materials Science

31, 2008

93-96

0.87

 

123

67.      

Rao, J. R.; Prakash, A.; Thangaraj, E.; Sreeram, K. J.; Saravanabhavan, S.; Nair, B. U.

Natural dyeing of leathers using natural materials

Journal of American Leather Chemists Association

103, 2008

68-75

0.7

3

68.      

Sreeram, K. J.; Ramasamy, I.; Nair, B. U.

Synthesis of iron oxide nanoparticles using chitosan and starch templates

Transition Metal Chemistry

33, 2008

127-131

1.621

10

69.      

Sreeram, K. J.; Kumeresan, S.; Radhika, S.; Sundar, V. J.; Muralidharan, C.; Nair, B. U.; Ramasami, T.

Use of mixed rare earth oxides as environmentally benign pigments

Dyes and Pigments

76, 2008

243-248

3.764

17

70.      

Saravanabhavan, S.; Sreeram, K. J.; Rao, J. R.; Nair, B. U

The use of toxic solid waste for the adsorption of dyes from waste streams

Journal of Chemical Technology and Biotechnology

82, 2007

407-413

2.587

10

71.      

A Aravindhan, R.; Sreeram, K. J.; Rao, J. R.; Nair, B. U

Biological removal of carcinogenic chromium(VI) using mixed Pseudomonas strains

Journal of General and Applied Microbiology

53, 2007

71-79

1.161

12

72.      

Aby, C. P.; Sreeram, K. J.; Nair, B. U.; Ramasami, T.

Doped oxides of cerium as inorganic colorants

Coloration Technology

123, 2007

374-378

1.168

3

73.      

Sreeram, K. J.; Srinivasan, R.; Devi, J. M.; Nair, B. U.; Ramasami, T.

Cerium molybdenum oxides for environmentally benign pigments

Dyes and Pigments

75, 2007

687-692

3.764

52

74.      

Sreeram, K. J.; Indumathy, R.; Rajaram, A.; Nair, B. U.; Ramasami, T.

Template synthesis of highly crystalline and monodisperse iron oxide pigments of nanosize

Materials Research Bulletin

41, 2006

1875-1881

2.873

26

75.      

Sreeram, K. J.; Rao, J. R.; Chandrababu, N. K.; Nair, B. U.; Ramasami, T.

High exhaust chrome-aluminium combination tanning: Part 1. Optimization of tanning

Journal of American Leather Chemists Association

101, 2006

86-95

0.7

7

76.      

Sreeram, K. J.; Ramalingam, S.; Rao, J. R.; Chandrababu, N. K.; Nair, B. U.; Ramasami, T.

Direct chrome liquor recycling under Indian conditions: Part 2. Pilot scale tanning studies

Journal of American Leather Chemists Association

100, 2005

257-264

0.7

2

77.      

Sreeram, K. J.; Ramesh, R.; Rao, J. R.; Chandrababu, N. K.; Nair, B. U.; Ramasami, T.

Direct chrome liquor recycling under Indian conditions: Part 1. Role of chromium species on the quality of the leather

Journal of American Leather Chemists Association

100, 2005

233-242

0.7

7

78.      

Madhan, B.; Sreeram, K. J.; Sharli, A.; Rao, J. R.; Nair, B. U

An integrated approach for the treatment of vegetable tanning wastewaters

Journal of the Society of Leather Technologists and Chemists

89, 2005

9-14

0.09

2

79.      

Saravanabhavan, S.; Sreeram, K. J.; Rao, J. R.; Nair, B. U.

The three pot solution for chromium, tannins and solid wastes: Recovery and reuse technique for spent semi-chrome liquor and chrome shavings

Journal of the Society of Leather Technologists and Chemists

88, 2004

202-207

0.09

4

80.      

Sreeram, K. J.; Saravanabhavan, S.; Rao, J. R.; Nair, B. U

Use of chromium-collagen wastes for the removal of tannins from wastewaters

Industrial and Engineering Chemistry Research

43, 2004

5310-5317

3.14

26

81.      

Shrivastava, H. Y.; Sreeram, K. J.; Nair, B. U

Aggregation of mucin by chromium(III) complexes as revealed by electrokinetic and rheological studies: Influence on the tryptic and O-glycanase digestion of mucin

Journal of Biomolecular Structure and Dynamics

21, 2004

671-680

3.107

2

82.      

Rao, J. R.; Thanikaivelan, P.; Sreeram, K. J.; Nair, B. U

Tanning studies with basic chromium sulfate prepared using chrome shavings as a reductant: A call for 'wealth from waste' approach to the tanning industry

Journal of American Leather Chemists Association

99, 2004

170-176

0.7

8

83.      

Sreeram, K. J.; Aravindhan, R.; Raghava, J.; Rao, J. R.; Nair, B. U

Mixed metal complexes of zirconium: A step towards reducing usage of chromium in tanning

Journal of American Leather Chemists Association

99, 2004

114-122

0.7

3

84.      

Sreeram, K. J.; Shrivastava, H. Y.; Nair, B. U

Studies on the nature of interaction of iron(III) with alginates

Biochimica et Biophysica Acta-Gen. Subjects

1670, 2004

121-125

3.679

65

85.      

Sreeram, K. J.; Tiwari, M. K.; Ramasami, T

Some studies on recovery of chromium from chromite ore processing residues

Indian Journal of Chemistry Section A – Bioinorganic

42, 2003

2447-2454

0

3

86.      

Maheshwari, R.; Sreeram, K. J.; Dhathathreyan, A.

Surface energy of aqueous solutions of Hofmeister electrolytes at air/liquid and solid/liquid interface

Chemical Physics Letters

375, 2003

157-161

1.860

30

87.      

Sreeram, K. J.; Ramasami, T

Sustaining tanning process through conservation, recovery and better utilization of chromium

Resources Conservation and Recycling

38, 2003

185-212

5.120

101

88.      

Rao, J. R.; Thanikaivelan, P.; Sreeram, K. J.; Nair, B. U

Green route for the utilization of chrome shavings (chromium-containing solid waste) in tanning industry

Environmental Science and Technology

36, 2002

1372-1376

6.198

66

89.      

Sreeram, K. J.; Ramasami, T.

Speciation and recovery of chromium from chromite ore processing residues

Journal of Environmental Monitoring

3, 2001

526-530

2.491

10

90.      

Sreeram, K. J.; Rao, J. R.; Nair, B. U.; Ramasami, T.

Approaches towards elucidating the mechanism of tanning using an organo-zirconium complex

Journal of American Leather Chemists Association

95, 2000

359-367

0.7

9

91.      

Sreeram, K. J.; Kanthimathi, M.; Rao, J. R.; Sundaram, R.; Nair, B. U.

Development of an organo-zirconium complex - Organozir as possible alternative to chromium

Journal of American Leather Chemists Association

95, 2000

324-332

0.7

19

92.      

Sreeram, K. J.; Rao, J. R.; Nair, B. U.; Ramasami, T.

Effect of nature of alkali on the zeta potential, colour and particle size of chromium(III) hydroxide

Journal of Scientific and Industrial Research

59, 2000

569-574

0.534

1

93.      

Thanikaivelan, P.; Geetha, V.; Rao, J. R.; Sreeram, K. J.; Nair, B. U.

A novel chromium-iron tanning agent: Cross-fertilization in solo tannage

Journal of the Society of Leather Technologists and Chemists

84, 2000

82-87

0.09

20

94.      

Sreeram, K. J.; Rao, J. R.; Sundaram, R.; Nair, B. U.; Ramasami, T

Semi-continuous recovery of chromium from waste water

Green Chemistry

2, 2000

37-41

8.586

28

95.      

Sreeram, K. J.; Rao, J. R.; Venba, R.; Nair, B. U.; Ramasami, T

Factors in gravitational settling of chromic hydroxide in aqueous media

Journal of the Society of Leather Technologists and Chemists

83, 1999

111-114

0.09

6

96.      

Chandrasekaran, B.; Rao, J. R.; Sreeram, K. J.; Nair, B. U.; Ramasami, T.

Chrome tanning: State-of-art on the material composition and characterization

Journal of Scientific and Industrial Research

58, 1999

1-10

0.534

40

Books Authored/Edited

S.No

Title

Role

Publisher

Year of Publication

1

Technology Roadmap Manufacturing – Leather

Co author

TIFAC, DST

2017

2

Technology Roadmap Manufacturing

Editor

TIFAC, DST

2017

3

Engineering of Polymers and Chemical

Complexity, Volume I: Current State of the Art and Perspectives

Co author

CRC Press

2014

4

Chapter 4 Industrially relevant nanoparticles – hematite. In Advanced Nanomaterials: Synthesis, Properties and Applications

Co author

CRC Press

2014

5

Encyclopedia of Metalloproteins – Chromium and Leather

Co author

Springer. ISBN: 978-1-4614-1532-9

2013

6

Advances in Industrial Wastewater Treatment (Goel PK ed) - Some Strategies Towards Mitigation of Pollution From Tanneries: A Review;

Co author

Technoscience Publications, Jaipur, India: ISBN: 978-8-1857-7161-8

2003

Patents filed and granted
Sl.No Patent.No. Appln. No Date of Filing Patent Details
1.

 

2727/DEL/2014  

A novel silica based organic colorant for leather and a process for the preparation thereof; S Ramalingam, KJ Sreeram, JR Rao, BU Nair

2.

 

2704/DEL/2014  

An improved tanning process; M Sathish, KJ Sreeram, B Madhan, JR Rao, BU Nair

3.

 

1786/DEL/2014   A waterless tanning process for making leather; S Silambarasan, GC Jayakumar, P Thanikaivelan, KJ Sreeram, JR Rao, BU Nair
4.

 

937/DEL/2014  

A novel melamine-chrome complex for leather processing and a process for the preparation thereof; KJ Sreeram, S Sangeetha, GC Jayakumar, JR Rao, BU Nair

5.   86/DEL/2014  

An inorganic blue colorant and a process for the preparation thereof; KJ Sreeram, S Radhika, BU Nair

6.

 

3812/DEL/2013  

An improved post tanning process for leather; GC Jayakumar, KJ Sreeram, R Usha, A Dhathathreyan, JR Rao, BU Nair

7.

 

3193/DEL/2012 12/10/2012 A condensate of amino resin with polysaccharide and/or polyphenol and a process for the prepaparation thereof; KJ Sreeram; S Sangeetha; JR Rao, BU Nair
8.

 

0648/DEL/2007 23/03/2007 A process for the preparation of novel synthetic tanning agent; P Nataraj, S Subramani, R Aravindhan, KJ Sreeram, JR Rao, BU Nair, T Ramasami
9.

247593

1276/DEL/2005 31/03/2005

A process for making wet-pink leather; M Chandrabose, NN Fathima, KJ Sreeram, JR Rao, BU Nair and T Ramasami

(US Patent No. 7252687 dated 7/8/2007)
10.

252904

3333/DEL/2005 09/12/2005

Nanosized sulphide compounds of cerium and a process for the preparation thereof; KJ Sreeram, HY Srivastava, BU Nair, T Ramasami, UV Varadaraju

(US Patent No. 7247291 dated 24/07/2007)
11.

237487

1262/DEL/2005 31/03/2005

A process for the preparation of inorganic colorants from mixed rare earth compounds; KJ Sreeram, BU Nair, T Ramasami

(US Patent No. 7279036 dated 9/10/2007)
12.

229249

1093/DEL/2002 30/10/2002

A process for simultaneous recovery of chromium and iron from chromite ore processing residue; KJ Sreeram, T Ramasami

(US Patent No. 7220394 dated 22/05/2007)
13.

244012

906/DEL/2000 06/10/2000

A process for the preparation of a novel synthetic tanning agent; M Kanthimathi, P Thanikaivelan, KJ Sreeram, JR Rao, R Sundaram, BU Nair, T Ramasami

14.

216560

446/DEL/1999 19/03/1999

A process for the preparation of a novel chromium-iron complex for use in leather industry; JR Rao, KJ Sreeram, P Thanikaivelan, BU Nair, T Ramasami

15.

215050

3077/DEL/1998 20/10/1998

A process for the preparation of novel organometallic polymeric matrix useful as tanning agent; KJ Sreeram, M Kanthimathi, JR Rao, R Sundaram, BU Nair, T Ramasami

 

Important Popular Articles

  1. Leather Chemicals: Present Scenario and Future Trends; KJ Sreeram, J Raghava Rao, B U Nair and A Subbarama Naidu; Chemical Business, 22, 56-59, April 2008.
  2. Chrome Management Techniques in Leather Processing, J Raghava Rao, KJ Sreeram, P Thanikaivelan, NK Chandrababu, S Ramalingam , B U Nair and T Ramasami Training Program on Cleaner technologies in Leather manufacture, RANITEC CETP, Ranipet, June 2005.

 

Highlights of Patents/Copyrights/Trade Marks/IPR Granted/Applied

Sl.No

Application Number

Title

Application Date

Status

1.       

201911009347

A novel fatliquor for leather processing and a process for the preparation thereof

Just submitted

TRL 4*

CSIR-FTT

2.       

3120/DEL/2015 

An improved process for making retanned leather with dyeing effect

30/09/2015

Under examination

TRL 4*

CSIR-FTT

3.       

2352/DEL/2015 

A process for curing cum dehairing of hide/skin

31/07/2015

Under examination

TRL 4

Industry Demo done

4.       

1980/DEL/2015 

An inorganic yellow pigment for industrial applications and a process for the preparation thereof

01/07/2015

Under examination

TRL 4

100 g level

5.       

2727/DEL/2014 

A novel silica based organic colourant for leather and a process for the preparation thereof

23/09/2014

Under examination

TRL 3

10 g level

6.       

2704/DEL/2014 

An improved tanning process

22/09/2014

Under examination

TRL 3

7.       

1786/DEL/2014 

A waterless tanning process for making leather

02/07/2014

Under examination

TRL 6

8.       

937/DEL/2014 

A novel melamine-chrome complex for leather processing and a process for the preparation thereof

01/04/2014

Amended Stage

TRL 6

Commercialized

9.       

86/DEL/2014 

An inorganic blue colorant and a process for the preparation thereof

13/01/2014

Application Examined

TRL 4

10.   

3812/DEL/2013 

An improved post tanning process for leather

30/12/2013

Amended Stage

TRL 3

11.   

3193/DEL/2012 

A condensate of amino resin with polysaccharide and/or polyphenol and a process for preparation thereof

12/10/2012

Granted

IN 300047

TRL 4

12.   

648/DEL/2007 

11/877878 (US)

A tanning composition and a process for the preparation thereof

23/03/2007

Granted

IN 262820

TRL 3

13.   

3333/DEL/2005 

11/365763 (US)

Nano sized sulfide compounds of cerium and a process for the preparation thereof

09/12/2005

Granted

IN 252904

US 7247291

TRL 3

14.   

1276/DELNP/2005

11/020501 (US) 

A process for making wet-pink leather

31/03/2005

Granted

IN 247593

US 725687

TRL 4

15.   

1262/DELNP/2005 

11/021566 (US)

A process for the preparation of inorganic colorants from mixed rare earth compounds.

31/03/2005

Granted

IN 237487

US 7279036

TRL 4

16.   

1093/DEL/2002

10/3000540 (US) 

A process for simultaneous recovery of chromium and iron from chromite ore processing residue

30/10/2002

Granted

IN 229249

US 7220394

TRL 3

17.   

906/DEL/2000 

A process for the preparation of a novel synthetic tanning agent.

06/10/2000

Granted

IN 244012

TRL 6

Commercialized

18.   

446/DEL/1999 

A process for the preparation of a novel chromium-iron complex for use in leather industry

19/03/1999

Granted

IN 216560

TRL 3

19.   

3077/DEL/1998 

A process for the preparation of novel organo-metallic polymeric matrix useful as tanning agent

20/10/1998

Granted

IN 215050

TRL 6

Commercialized

 

Highlights of Technologies Developed, Licensed and/or Commercialized

Sl.No

Technology

Current Status

Client

1.       

Melamine-chrome complex for leather processing

Commercialized

2017

M/s. Sellam Chemicals

2.       

Waterless tanning process

Commercialized

2017 onwards

Multiple licenses - 90

3.       

High Exhaust Chrome Tanning Salt

Commercialized

2014

M/s. Rishab Intermediates

4.       

Self Basified basic chromium sulfate

Commercialized

2011

M/s. Sri Kanakadurga chromate (P) Ltd.

5.       

Single step dehairing and fibre opening

Commercialized

2010

M/s. SPIC India

6.       

Chrome tanning using TANAID

Commercialized

2004

M/s. KKSK Leather Processors (P) Ltd.

7.       

Basic chromium sulfate

Commercialized

2004

M/s. Sri Rakka-Chem. Syntans

8.       

Synthetic tanning agent

Commercialized

2000

M/s. Balmer Lawrie & Co.

9.       

Clarichrome

Commercialized

1996

M/s. Quinn India Group of Companies

10.   

Claritan AL

Commercialized

1996

M/s. Quinn India Group of Companies

11.   

Chrome recovery / reuse for wool-on sheep skin process

Commercialized

1996

M/s. Hindustan Lever Limited

12.   

Organo-metallic polymeric matrix useful as tanning agent

Commercialized

2003

M/s. Balmer Lawrie & Co.

13.   

Utilization of hydrogen peroxide for treatment of tannery wastes

Commercialized

1996

M/s. Asian Peroxides Ltd.

14.   

Chromium-iron complex for use in leather industry

Developed

 

15.   

Simultaneous recovery of chromium and iron from chromite ore processing residue

Developed

 

16.   

Inorganic colorants from mixed rare earth compounds

Developed

 

17.   

Wet-pink leather

Developed

 

18.   

Nano sized sulfide compounds of cerium

Developed

 

19.   

Tanning composition

Developed

 

20.   

Condensate of amino resin with polysaccharide and/or polyphenol

Developed

 

21.   

Improved post tanning process

Developed

 

22.   

Inorganic blue colorant

Developed

 

23.   

Improved tanning process

Developed

 

24.   

Silica based organic colorant for leather

Developed

 

25.   

Inorganic yellow pigment for industrial applications

Developed

 

26.   

Process for curing cum dehairing of hide/skin

Developed

 

27.   

Process for making retanned leather with dyeing effect

Developed

CSIR FTT

28.   

Retanning cum fatliquoring agent

Developed

CSIR FTT

29.   

Leather as a sensor for UV light, Hydrogen gas and Heat

Developed

 

 

Highlights of Technical Consultancy and Testing Services carried out

Sl.No/Year

Technical Service Rendered

Contribution

1.      /1996

Utilization of hydrogen peroxide for the treatment of tannery wastes

·         Analytical support

2.      /2004

Process for the reduction of hexavalent chromium from chromite mine tailings

·         Research on vegetable tannin materials

·         Analytical support

3.      /2011

Expert intervention towards capacity building of leather industry development institute (LIDI), Ethiopia through Twinning program

·         Setting up of R&D laboratory

·         Initiating MSc level research

4.      /2013

Sector specific study and report for tannery chrome chemical sector in West Bengal

·         Proposal for management of chromium in landfills

·         Analytical support

5.      /2013

Assessing potential of pentaerythritol solution and sodium formate solution

·         Development of BCS

·         Analytical support

6.      /2015

Twinning II- Value added Activities for the sustenance of capacity Building for Leather Industry Development Institute (LIDI) Ethiopia to meet the extended requirements of Ethiopian Leather and Leather Products sector

·         Accreditation for their testing laboratory

·         Interlaboratory comparison studies

·         Training of analytical staff

7.      /2015

Direct chrome liquor recycling

·         Analytical support

8.      /2016

Conducting pre-dispatch inspection and post supply inspection for procurement of footwear for the year 2016-17 to TNTB & ESC.

·         Project Leader

·         Testing and quality assurance to Government of Tamil Nadu

9.      /2017

Conducting tender sample evaluation for procurement of footwear by Chhattisgarh State Minor Forest Produce Cooperative Federation

·         Project Leader

·         Testing and quality assurance

10.  /2018

Pre dispatch Inspection, pre and post testing charges for Ankle boots, Footwear ,School Bags and socks samples to TNTB&ESC

·         Project Leader

·         Testing and quality assurance

11.  /2018

Quality Testing of Canvas Men's Shoes and Canvas Ladies Chappal Produced by Madhya Pradesh.

·         Project Leader

·         Testing and quality assurance

 

Sponsored/Consultancy Projects
1. M/s. Tata Steel, Jamshedpur
2. M/s. Sri Rakka Chemicals, Chennai
3. M/s. Balmer Lawrie & Co. Ltd., Kolkata
4. M/s. Hindustan Lever Limited, Panruti
5. M/s. KKSK Leathers, Erode
6. M/s. Kanakadurga Chromates, Nellore
Salient Features of Sponsored/Consultancy Projects
a. Can there be a replacement for Fe(II) sulfate for reducing Cr(VI) in chromite fines?
 

Issue addressed: Chromite fines and during this process generates Cr(VI) in the ore, limits for which was 0.03 ppm. They were employing an Fe(II) sulfate washing, which led to large quantities of sulfate in the chromite ore leading to unacceptable color. After a careful analysis of the redox potentials, Dr Sreeram’s group identified a natural source – Myrobalan, spraying of which resulted in complete reduction of Cr(VI), within a contact time of 5 sec. Added advantage of the process was that it also prevented any further formation of Cr(VI)

b. Making high exhaust basic chromium(III) sulfate
 

The group at Chemical laboratory, CLRI has a good understanding of how uptake of chromium in tanning process can be tuned through preparation of the tanning salt. Dr Sreeram’s contribution to this project was the optimization of Cr(VI) to reducing agent ratio and the role of temperature to ensure that dimeric Cr(III) was formed as against the cyclic tetramer.

c. Can we enhance chromium uptake through tanning aid?
 

One of the requirements of the leather processing activity is to ensure that penetration of chromium preceeds its fixation. Towards this several exhaust aids are employed. However, they either have formaldehyde as a crosslinker or result in improper binding of chromium. Dr Sreeram and colleagues developed a polymeric synthetic tanning agent that when offered prior to chrome tanning ensure complete uptake of chromium and also provided for fuller leather. The aid also enabled avoidance of pickling, a process prior to tanning which resulted in high salinity in wastewater. TANAID is a very successful product.

d. Moving from batch to continuous chrome recovery?
 

Nucleation and particulation chemistry tells us that slower the nucleation process larger the aggregate and for this reason the precipitation of chromium(III) to chromium(III) hydroxide as a part of recovery/reuse of chromium in tannery wastewaters employed MgO. However, MgO turns to MgSO4 causing hardness to water. When large quantities of oil is present, the formation of magnesium soaps hampers the precipitation, a case observed at M/s. Hindustan Lever Ltd., where they were processing sheep skin. Through appropriate study of the zeta potentials associated with the precipitation process, Dr Sreeram was able to design a reactor which not only provided for lesser sludge volume when using sodium carbonate but also turned the reaction from one of batch type (limitation from poor solubility of MgO) to a continous reactor

e. What limits direct recycling of chromium?
  When a tanner tries to recycle the spent chrome tanning wastewater directly into the next batch, it results in surface fixation thus leading to the need for recovery as hydroxide and reuse. Through understanding of chromium chemistry, it was found that the spent liquor containing significant proportion of large sized tetracyclic tetrameric species was the cause for surface fixation. A process by which the pH of the spent liquor was reduced to less than 1 resulted in a liquor carrying dimeric species. A package complete with engineering design for reaction vessel for pH adjustment, feeding into drum etc. was provided to a tanner in Erode district of TN.
f. How do you tune a self-basifying chromium?
 

In leather processing, after the penetration of chromium is achieved, the chrome tanning salts are bridged through a process called basification. This is an additional step. Taking cue from the precipitation chemistry studied earlier a self basifying chromium carrying Cr(III) and MgO was developed and provided.

Ten Most Significant Refereed Journal Papers
Sl.No

Authors

Title of paper Journal Vol/Year Pg. Nos Citations
1. Nidhin, M.; Indumathy, R.; Sreeram, K. J.; Nair, B. U Synthesis of iron oxide nanoparticles of narrow size distribution on polysaccharide templates Bulletin of Materials Science 31, 2008 93-96 62
2. Sreeram, K. J.; Srinivasan, R.; Devi, J. M.; Nair, B. U.; Ramasami, T. Cerium molybdenum oxides for environmentally benign pigments Dyes and Pigments 75, 2007 687-692 38
3. Sreeram, K. J.; Shrivastava, H. Y.; Nair, B. U Studies on the nature of interaction of iron(III) with alginates Biochimica et Biophysica Acta-Gen. Subjects 1670, 2004 121-125 38
4. Sreeram, K. J.; Nidhin, M.; Nair, B. U. Microwave assisted template synthesis of silver nanoparticles Bulletin of Materials Science 31, 2008 937-942 35
5. Sreeram, K. J.; Aby, C. P.; Nair, B. U.; Ramasami, T. Colored cool colorants based on rare earth metal ions Solar Energy Materials and Solar Cells 92, 2008 1462-1467 30
6. Sindhu, K.; Indra, R.; Rajaram, A. Sreeram, K. J.; Rajaram, R. Investigations on the Interaction of Gold-Curcumin Nanoparticles with Human Peripheral Blood Lymphocytes Journal of Biomedical Nanotechnology 7, 2011 56-56 29
7. Sreeram, K. J.; Indumathy, R.; Rajaram, A.; Nair, B. U.; Ramasami, T. Template synthesis of highly crystalline and monodisperse iron oxide pigments of nanosize Materials Research Bulletin 41, 2006 1875-1881 26
8. Nidhin, M; Nazeer, SS; Jayasree, RS; Kiran, MS; Nair, BU; Sreeram, KJ Flower shaped assembly of cobalt ferrite nanoparticles: application as T-2 contrast agent in MRI RSC Advances 3, 2013 6906-6912 9
9. Sangeetha, S; Usha, R; Sreeram, KJ; Nair, BU Enhancing collagen stability through nanostructures containing chromium(III) oxide Colloids and surfaces. B, Biointerfaces 100, 2012 36-41 6
10. Sangeetha, S.; Basha, R.; Sreeram, K.J.; Sangalimuthu, S. N.; Nair, B. U. Functional pigments from chromium(III) oxide nanoparticles Dyes and Pigments 94, 2012 548-552 6
Research in Coverpages
Research in a Nutshell
 

Sustainable chemistry is the central theme of research of Dr KJ Sreeram. His research during the last ten years have been predominantly dominated towards using nanoscience to develop solutions to existing problems in coloring and tanning industries.

  Nanoscience inputs for colorants and added advantages thereon
  Synthesis of iron oxide nanoparticles in the nano range has been very exciting and challenging area of research. Sensitivity of the preparative strategy complicates both reproducibility and scale up of the process. Dr Sreeram has done brilliant work in advancing the field of hematite nanoparticles, especially in the design and template based synthesis of highly monodisperse α-Fe2O3 nanoparticles, a class of superparamagnetic particles with a wide range of applications. To tune the size and shape of the nanoparticles, he designed self-assembled films of chitosan-alginate, chitosan-pectin and starch on to which Fe2+ centres could interact in a spatially separated manner. This was followed by a careful calcination of the film to provide for nanoparticles below 30 nm and having a polydispersity

index of less than 0.15. Dr Sreeram was the first investigator to demonstrate the synthesis of hematite nanoparticle using sacrificial polysaccharide templates – in more than three ways, viz., calcination of dried polysaccharide – iron complex, calcination of polysaccharide films carrying Fe2+ centres and low temperature reflux synthesis from Fe-starch complexes (2 papers in these area have put together received 100 citations). He has demonstrated that these procedures can be extended to synthesis of CoO and cobalt ferrite nanoparticles as well. He has shown that these iron oxide nanoparticles can be used crosslink collagen leading to several biomedical applications. Cobalt ferrite nanoparticles synthesized by this method also had an unusual MRI contrast (9 citations within one year of publication). He built on this early work in the construction of functionally useful nanomaterials that were optimized for high luminescence through a natural product – catechin based tuning of size, shape and polymorph character. One of the significance of Dr Sreeram’s work has been that all the synthesized nanoparticles are tested for their toxicity to various cells. For instance, his work on how gold nanoparticles, synthesized through a green route using curcumin as a reducing agent, would interact with human peripheral blood lymphocytes has been much discussed by the research community.
  Finding replacement to toxic transition metal ion based pigments in rare earths
  Dr Sreeram today is a leader in the exciting new area of material chemistry, viz. the development of rare earth based pigments. He has done landmark work that has advanced the applications of rare earth oxides as pigments for coloring plastics, ceramic and leather. Through careful tuning of the bandgap energies by appropriate doping into the lanthanide lattice (light RE), colors in the range of blue, yellow and brown-red have been obtained. The mass tone, hiding power, tint strength and applications as colorant for leather, plastics and exteriors have been optimized through a new route of synthesis, viz., sol-gel-microwave irradiation as against the conventional solid state synthesis. His publications in this area have been well received (over 200 citations). Understanding that such products can only be cost effective when raw material costs are brought down, Dr Sreeram developed a process for the preparation of these pigments from mixed rare earth chlorides – a byproduct of the thorium extraction process. M/s. Indian Rare Earths Limited investigated the upscalability of this process at their Kollam unit. M/s. IREL suggested that the process was viable and marketable.
  Exploiting size and shape tuning for deeper applications such as turning leather into sensors and developing cool pigments
  The thrust of Dr Sreeram’s research has been the deepening of the applications of existing knowledge through modifications in synthesis strategies, size tuning etc. His work on turning phenomena of chromism into an attractive option for obtaining smart leathers, such as the use of doped chromium(III) isocyanate as surface coating on leather to get solvato or thermo-chromism based effects, coating leather with RE complexes to obtain UV sensing ability and use of PdO-ZnO nanocomposites as surface coatings to turn leather from brown to black on exposure to hydrogen, such as when hydrogen leaks from a gas driven vehicle has attracted the attention of leather community.

He proposed that the addition of a rare earth metal ion and/or reducing the crystal size of resultant pigment to less than 10 nm could result in near infra red reflectivity from the coated surface. Range of pigments whose, solar irradiance R* values were 10-30 units more than commercial pigments were developed and tested by his group. The advantage of such pigments is to provide for thermally comfortable surfaces, where prior to this work, the color is limited to white and pastel shades. Through thermal imaging his group demonstrated that the surface temperature of leather and concrete surfaces coated with the newly developed pigments were at least 3 – 5 deg. C lesser than conventional, even without a white base coat. That a light absorbing color like black could be turned into a light reflecting pigment was demonstrated through synthesis of CoO nanoparticles on polysaccharide templates, an aspect that the Chemical Engineering J covered on its Cover page.
  Developing sustainable chemistry for leather sector – complete with upscaling and demonstration
  Dr Sreeram continues his passion for green chemistry based alternatives for chromium. Starting from his contributions to greening of chromium based industries such as methods for handling chromium ore processing residues to developing high exhaust chrome tanning methods, contributions that led to his receiving the CSIR Young Scientist Award in 2004, Dr Sreeram has gone on to develop a range of formaldehyde free synthetic tanning agents for the leather sector, a few of which have been commercialized. One of the recent innovations in this area has been the development of a chromium – melamine complex synthetic tanning agent devoid of formaldehyde as a crosslinker, specifically suited for raw material from Indian origin. He has also developed methods for converting chromium bearing solid wastes from leather sector as well as black liquor from paper and pulp industry for preparation of leather auxiliaries (over 70 citations). This aspect of his has been considered as a positive development by the leather sector, who in their vision for 2030 have suggested that leather chemicals should be developed from within the industry itself.

Awards

2002

Chosen as one of the 5 researchers to start research activity on Environmentally benign rare earth colorants under NMITLI mode

2004

CSIR Young Scientist Award – Engineering Sciences

2013

Certified researcher of International Union of Research (IUR) Commission of International Union of Leather Technologists and Chemists Societies (IULTCS)

2019

Fellow of the Society of Leather Technologists & Chemists, UK

2019

Fellow of the Royal Society of Chemistry, UK

 

Honors

2004

Indo-UK Networking of Young Scientists – British Council in India

2008

Prepared the CLRI Vision 2025 under the instructions of DG CSIR

2008

DST BOYSCAST Fellowship for advanced research in material science

2009

Moderator, XXX IULTCS, Beijing

2010

DST-CONACYT exchange program project to work on upconversion nanoparticles along with Universidad Autónoma de Nuevo León, Mexico

2010

Awarded a project to develop on environmentally benign rare earth pigments by the Green Chemistry taskforce of DST

2010

Awarded a CSIR-EMPOWER project to work on collagen stabilization using functionalized nanoparticles

2012

Appointed as Nodal Officer for CSIR-CLRI suprainstitutional project :S&T revolution in leather with a green touch (STRAIT) with budget outlay  of Rs. 62.59 crores for 2013-17.

2014

Invited to contribute a chapter on Leather - Technology Roadmap Manufacturing 2035, TIFAC, DST.

2015

Editor, Technology Vision 2035 for the Technology Roadmap - Manufacturing Sector – TIFAC, DST

2015

Vice President Indian Leather Technologists Association

2016

Member BIS CHD17 - Leather

2017

Convener – International Union of Leather Technologists and Chemists Societies Congress -2017 in India

2017

Nodal Officer – Visit of Parliamentary Committee on S&T and Environment & Forests to CSIR-CLRI

2018

Member, ISO TC 120

2018

Convener, CLRI-NAM S&T Centre, “International Training Workshop on Developing Key Parameters for Ensuring Sustainability of Leather Sector in Developing Countries”

2019

Catalyzed approx.. Rs. 3.2 Crores per year as testing and analytical charges for the institute since 2017.

Research Scholars

Research Work Guided at Doctoral / Post Graduate Level

Sl.No

Candidate

Title of Work

University/College

Year<

Doctoral Level

1.

Priya N

Approaches towards facile identification of genuine leather

University of Madras

*

2.

Bhargavi N

Developing green methods in leather lubrication in aqueous and non-aqueous systems

University of Madras

*

3.

Gunavadhi M

Enhancing the sustainability and applicability of nanoparticles using natural product chemistry

Anna University

*

4.

Ramadevi PV

Role of post tanning in assessing the biodegradability of leather and development of auxiliaries that enhance biodegradability

University of Madras

*

5.

Vedhanayagam M

Understanding collagen-functionalized nanomaterials interactions for tuning biomedical applications

University of Madras

2018

6.

Tamilmani V

Studies on the tuned synthesis of lanthanum based nanostructures using catechin as chelating ligand for applications as bioprobe

University of Madras

2016

7.

Radhika SP

Studies on the development of rare earth doped metal oxides as pigments for thermally comfortable surfaces

University of Madras

2014

8.

Nidhin M

Size and shape selectivity in synthesis of iron and cobalt oxide nanoparticles on polysaccharide templates

University of Madras

2012

PG Level

1.

Saravanan R

Preparation of fog resistant and   flame resistant automotive upholstery leathers

Anna University, Chennai, IN

2019

2.

Gowri B

Synthesis and Characterization of Iron Dopped Red Brown Pigment

Govt. Arts College, Kumbakonam, IN

2018

3.

Namratha A

Synthesis and characterization of enzyme immobilized copper oxide nanoparticles

Meenakshi College for Women, Chennai, IN

2018

4.

Jaithanya YM

5.

Daniel Tesfaye

Studies on the application of coffee husk for leather processing

Addis Ababa institute of technology, Ethiopia

2017

6.        

Guru Prasad K

Synthesis of Graphene-ZnO-PdO Nanocomposite for Photocatalytic Application

University of Madras, IN

2015

7.        

Sowmya M

Nanoparticles for dye degradation applications

University of Madras, IN

2015

8.        

Sangeetha P

Studies on the Conformational Changes of Bovine Serum Albumin Interaction with APTES functionalized CuO Nanoparticle

University of Madras, IN

2014

9.        

Swetha A

Studies on the Interaction of Cytochrome –C with 11- Mercaptodecanoic Acid Functionalized Gold Nanoparticles

University of Madras, IN

2014

10.

Solomon Fessehaye

Approaches to near zero utilization of water in post tanning operations of leather processing

Addis Ababa institute of technology, Ethiopia

2014

11.

Tewodros Kasa Dada

Manufacturing of Synthetic Tanning Agent from Kraft Lignin

Addis Ababa institute of technology, Ethiopia

2013

12.

Raj Preeth D

Studies on enhancing biomedical application of Hydroxyapatite nanoparticles

University of Madras, IN

2012

13.

Rizvan Basha M

Synthesis and Characterization of Chromium(III) Oxide Nanopigments

University of Madras, IN

2011

14.

Nithyakarthikeyani R

Development of environmentally friendly yellow pigments from rare earth metal ions

Bharathiyar University, Tamil Nadu, IN

2008

15.

Hema M

New approaches for synthesis of silver nanoparticles

Bharathiyar University, Tamil Nadu, IN

2008

16.

Sumitha Menon KP

Synthesis and characterization of Rare Earth oxides and environmentally friendly pigments for speciality applications

University of Calicut, Kerala, IN

2007

17.

Sony Sukumar

Studies on the photocatalytic degradation of reactive dyes

University of Calicut, Kerala, IN

2007

18.

Shankar M

Development of synthetic tanning agents for compact leathers:

Mecca Hajji Abdul Majid Award Winner

Anna University, IN

 

2007

19.

Nataraj R

Studies on the development of a multifunctional syntan

Anna University, IN

2007

20.

Pradeep Kumar M

Studies on the evaluation of atom economy for chrome tanning process

Anna University, IN

2007

21.

Vasanthy K

Investigations on the photochemical oxidation of colorants in wastewaters

NIT Thiruchirappali, IN

2007

22.

Kiruthika K

A process for the preparation of monodispersed nanosized iron oxide pigments

NIT Thiruchirappali, IN

2007

23.

Kumaresan S

Rare earths: a new class of environmentally benign colorants for leather – a feasibility study

Mecca Hajji Abdul Majid Award Winner

Anna University, IN

 

2006

24.

Dhayalan K

Studies on the use of rare earth salts for tanning

Anna University, IN

2006

25.

Renugambal

Synthesis and characterization of crystalline monodispersed iron oxide nanoparticles for industrial applications

Anna University, IN

2006