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Dr. V Sekkar

Professor Emeritus

Brief Introduction

Prof (Dr) V Sekkar joined the Faculty of SES, CUSAT as Professor Emeritus in September, 2018. Prior to the present position, he was employed at Vikram Sarabhai Space Centre (VSSC), Indian Space Research Organization (ISRO), where he served as Scientist in various capacities. During his long tenure at VSSC, he was involved in the analysis of propellant binder networks, development of new polymer systems, vibration isolators, carbon and silica aerogels and porous ceramics. He was involved in developing material systems that can endure space vehicle re-entry conditions. Post his superannuation from ISRO, he joined SES, CUSAT as Emeritus Professor in September, 2018 and currently he continues his research on adsorption powered water cleansing with porous carbons as adsorbents.

 

Education

  • M.Sc (Chemistry), Annamalai University, Tamil Nadu, 1978-80
  • M.Sc (Engineering), Aerospace Engineering, Indian Institute of Scienec, Bangalore, 1992
  • Ph.D (Engineering), Aerospace Engineering, Indian Institute of Scienec, Bangalore, 1995
  • PDF, National University of Singapore (NUS), Singapore, 2002-3.

 

Contact Info

  • Ph.:  9400770388, 9447389674
  • Email: vsekkar@gmail.com; vsekkar@cusat.ac.in Research Areas

 

Areas of research

Silica Aerogel    :    Cryo insulation, Medium level temperature thermal protection system (TPS)
Carbon aerogel    :    Ultra high temperature TPS for space vehicle re-entry systems, Energy storage systems  (Batteries, super capacitors), Hydrogen storage, CO2 capture, adsorption directed water cleaning, Capacitative deionization (CDI), nano catalyst support.
Carbon foam    :    Aerospace related thermo structural applications
Porous ceramic composites    :    Porous SiC, porous B4C, Porous SiOC, porous alumina, zirconia for high temperature TPS, catalytic support, space mirror
High  temperature stable polymer composites    :    Structural applications. The polymer systems include CNSL, Bismaleimides, silicones

 

Students

  1. Ancy Smitha Alex, University of Kerala, Dept of Chemistry, Awarded in March, 2018; Title : Silicone based Composites – Processing and Characterization
  2. Renjith, P K. CUSAT, Dept of Chemical Oceanography, Development of cost-effective silica aerogel based eco-friendly solutions for aquatic oil spill remediation” On going 

 

Publications

  1. Thakur Sudesh Kumar Raunija and V. Sekkar “Ignition resistance coating for semicryo engine combustion gas duct-Preparation, characterization and implementation” Published online on 20-10-2022 in  Advances in Space Research/ Elsevier https://doi.org/10.1016/j.asr.2022.09.060 
  2. Anant Prakash Pandey, M.A. Shaz, V. Sekkar, R.S. Tiwari, “Highly efficient catalytic derived synthesis process of carbon aerogel for hydrogen storage application”, International Journal of hydrogen energy, Published online on 09th March, 2022 Doi: https://doi.org/10.1016/j.ijhydene.2022.02.102 
  3. Anant Prakash Pandey, M.A. Shaz, V. Sekkar, R.S. Tiwari, “Synergistic effect of CNT bridge formation and spillover mechanism on enhanced hydrogen storage by iron doped carbon aerogel”, International Journal of Hydrogen Energy, published online on 3rd March 2022, Doi: https://doi.org/10.1016/j.ijhydene.2022.02.076  
  4. Remya Balakrishnan, A M Nallaperumal, S K Manu, Lity Alen Varghese and V.Sekkar, “DSC assisted kinetic analysis on the urethane network formation between castor oil based ester polyol and poly(methylene di phenyl isocyanate) (pMDI),  International Journal of Polymer Analysis and Characterization, 27:2, 132-146, 2022 DOI: 10.1080/1023666X.2022.2027084, published online 26, Jan, 2022 
  5. .Ravindra Kumar Bhardwaj, Homen Lahan, Venkataraman Sekkar, Bibin John and Aninda J. Bhattacharyya, “High-Performance Li-Metal-Free Sulfur Battery Employing a Lithiated Anatase TiO2 Anode and a Freestanding Li2S−Carbon Aerogel Cathode” ACS Sustainable Chemistry & Engineering, (2022) 10 (1), 410-420. DOI: 10.1021/acssuschemeng.1c06581
  6. V. Sivanandan Achari, Raichel Mary Lopez, A.S. Rajalakshmi, S Jayasree , O.M. Shibin, Deepthi John, V. Sekkar, “Microporous carbon with highly dispersed nano-lanthanum oxide (La2O3) for enhanced adsorption of methylene blue”, Separation and Purification Technology, 279 (2021) 119626;  https://doi.org/10.1016/j.seppur.2021.119626 
  7. Renjith P. K., Sarathchandran C., SivanandanAchary V., Chandramohanakumar N, Sekkar V., “Micro-cellular polymer foam supported silica aerogel: Eco-friendly tool for petroleum oil spill cleanup”, Journal of Hazardous Materials, Volume 415, 5 August 2021, 125548; Doi: https://doi.org/10.1016/j.jhazmat.2021.125548 
  8. Ashish Bhatnagar, Anant P.Pandey, M. Sterlin Leo Hudson, Pawan K. Soni, Satish K. Verma, Vivek Shukla, V. Sekkar, Manoj Tripathi, O.N. Srivastava, “Economical synthesis of highly efficient and tunable carbon aerogels for enhanced storage of CO2 emitted from energy sources” International Journal of Energy Research, Volume 45, Issue4, 25 March 2021, Pages 6285-6292; https://doi.org/10.1002/er.6251  
  9. Anant Prakash Pandey, Ashish Bhatnagar, Vivek Shukla, Pawan K. Soni, Sweta Singh, Satish K. Verma, M. Shaneeth, V. Sekkar, O.N. Srivastava, “Hydrogen storage properties of carbon aerogel synthesized by ambient pressure drying using new catalyst triethylamine”, International  journal of hydrogen energy, 45 (2020) 30818-30827.  Doi: 10.1016/j.ijhydene.2020.08.145
  10. C. Sarathchandran, Li Ziang, Robert A. Shanks, C. H. Chan, V. Sekkar, Sabu Thomas, “Crystallization kinetics, morphology and spherulite growth in poly(trimethylene terephthalate) modified with bisphenol-A diglycidyl ether”,  Journal of Thermal Analysis and Calorimetry, 141 (2020), pp727–737. Doi:  https://doi.org/10.1007/s10973-019-09047-1 
  11. Remya Balakrishnan, P.B. Soumyamol, K.P. Vijayalakshmi, Lity Alen Varghese, R. Rajeev, S.K. Manu & V. Sekkar, “Kinetic analysis of urethane formation between castor oil-based ester polyol and 4,4’-diphenyl methane diisocyanate”, (2020) Indian Chemical Engineer, DOI:  https://doi.org/10.1080/00194506.2020.1760947 
  12. V. Sivanandan Achari, Raichel Mary Lopez, A.S. Rajalekshmi, S. Jayasree, BindiaRavindran, V. Sekkar, “Scavanging nitrophenol from aquatic effluents with triethylamine catalyzed ambient pressure dried carbon aerogel” Journal of Environmental Chemical Engineering, 8 (2020) 103670; Doi:  https://doi.org/10.1016/j.jece.2020.103670
  13. Alex, A.S., Bhuvaneswari, S., Sreenivas, N., Gouri C., Sekkar V, “ Short silica fibre-reinforced polymethylsilsesquioxane–phenolic interpenetrating networks: exploration for use as ablative thermal protection system in aerospace”, Polymer Bulletin, 76, 3941–3956 (2019). https://doi.org/10.1007/s00289-018-2579-4
  14. Ancy Smitha Alex, Deepthi Thomas, S. K. Manu, N. Sreenivas, V. Sekkar, C. Gouri, “Addition-cure, room temperature vulcanizing silicone elastomer based syntactic foams with glass and ceramic micro-balloons”, Polymer Bulletin, 75, 747–767 (2018). https://doi.org/10.1007/s00289-017-2052-9.
  15. Ancy Smitha Alex, Bhuvaneswari S, SarathChandran C, Jayalatha T, Sekkar V, Gouri C., “Microstructure and phase evolution in pyrolysed short fibre reinforced polymethylsilsesquioxane-phenolic interpenetrating networks”, Journal of Analytical and Applied Pyrolysis 129 (2018) 241–247; Doi: https://doi.org/10.1016/j.jaap.2017.11.006 
  16. V. Sekkar, Ancy Smitha Alex, Vijendra Kumar, and G. G. Bandyopadhyay, “Theoretical Evaluation of Crosslink Density of Chain Extended Polyurethane Networks Based on Hydroxyl Terminated Polybutadiene and Butanediol and Comparison with ExperimentalData”, Journal of Energetic Materials, 2018 Jan 2; 36(1):38-47; DOI:  https://doi.org/10.1080/07370652.2017.1307884 
  17. Ancy Smitha Alex, R.S. Rajeev, V. Sekkar & C. Gouri, “The role of organoclay on the properties of Polymethylsilsesquioxane: A systematic study”, Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. 2017 Dec 2; 54(12):885-93; https://doi.org/10.1080/10601325.2017.1340076 
  18. Ancy Smitha Alex, Ananda Lekshmi M.S., Sekkar V., Bibin John, Gouri C. and Ilangovan S.A., “Microporous carbon aerogel prepared throughambient pressure drying route as anodematerial for lithium ion cells”,  Polymers for Advanced Technologies, 2017 Dec 1; 28(12):1945-50; doi: https://doi.org/10.1002/pat.4085 
  19. Ancy Smitha Alex, R.S. Rajeev, K. Krishnaraj, N. Sreenivas, S.K. Manu, C. Gouri &  V.Sekkar, “Thermal protection characteristics of polydimethylsiloxane - organoclay nano composites”, Polymer Degradation and Stability, 2017 Oct 1; 144:281-91; doi: https://doi.org/10.1016/j.polymdegradstab.2017.08.026 
  20. Ancy Smitha Alex, Vijendra Kumar, G.G. Bandyopadhyay & V. Sekkar, “A Fast and Effective Pyridine-Free Method for the Determination of Hydroxyl Value of Hydroxyl- Terminated Polybutadiene and Other Hydroxyl Compounds”
    Journal of Energetic Materials, 2017 Jul 3; 35(3):292-9 doi: https://doi.org/10.1080/07370652.2016.1178827 
  21. Ancy Smitha Alex, Vijendra Kumar, Rajeev R. S., Supriya N., Manu S. K., Gouri C., Bandyopadhyay G. G., Sekkar V, “Effect of organically modified montmorillonite clay on theproperties of hydroxy terminated polydimethylsiloxane: Journal of Adhesion Scienceand Technology, 2017 Jul 3; 31(13):1496-513; doi: https://doi.org/10.1080/01694243.2016.1264658 
  22. V. Sekkar, Ancy Smitha Alex, Vijendra Kumar and G. G. Bandyopadhyay, “Pot life extension of hydroxyl terminated polybutadiene based solid propellant bindersystem by tailoring the binder polymer microstructure”, Journal of Macromolecular Science, Part A.,2017 Mar 4; 54(3):171-5, doi: https://doi.org/10.1080/10601325.2017.1265403 
  23. Ancy Smitha Alex, R.S. Rajeev, R. Ranjith, Fazil Mohammad, C. Gouri , V. Sekkar, “Short Silica Fiber Composites with Simultaneous Interpenetrating Polymer Networks Constituted by Siloxane and Phenolic Systems” Polymer Composites 39(11), June 2017; DOI 10.1002/pc.24454
  24. Sweta Singh, Ashish Bhatanagar, Viney Dixit,  Vivek Shukla, M.A.Shaz, A.S.K. Sinha, O.N.Srivastava and V.Sekkar, “Synthesis Characterization and Hydrogen Storage Characteristics of Ambient Pressure Dried Carbon Aerogel”; International journal of hydrogen energy, 2016 Feb 9; 41(5):3561-70; doi:  https://doi.org/10.1016/j.ijhydene.2015.12.174 
  25. Sekkar V, Raunija TS., “Issues Related with Pot Life Extension for Hydroxyl‐Terminated Polybutadiene‐Based Solid Propellant Binder System”, Propellants, Explosives, Pyrotechnics, 2015 Apr 1;40(2):267-74; doi: https://doi.org/10.1002/prep.201400054 
  26. Sekkar V, Raunija TS, “Hydroxyl-Terminated Polybutadiene-Based Polyurethane Networks as Solid Propellant Binder-State of the Art”, Journal of Propulsion and Power, 2014 Oct 29; 31(1):16-35; doi: https://doi.org/10.1002/prep.201400054    
  27. Sekkar V., “Comparison between crosslink densities derived from stress–strain data and theoretically data evaluated through the α‐model approach for a polyurethane network system based on hydroxyl terminated polybutadiene and isophorone‐diisocyanate”, Journal of Applied Polymer Science, 2010 Jul 15; 117(2):920-5; doi: https://doi.org/10.1002/app.31643 
  28. Manu SK, Sekkar V, Scariah KJ, Varghese TL, Mathew S., “Kinetics of glycidylazide polymer‐based urethane network formation”, Journal of applied polymer science, 2008 Oct 15; 110(2):908-14; doi: https://doi.org/10.1002/app.28639 
  29. Sekkar V, Narayanaswamy K, Scariah KJ, Nair PR, Sastri KS, Ang HG, “Evaluation by various experimental approaches of the crosslink density of urethane networks based on hydroxyl‐terminated polybutadiene”, Journal of applied polymer science, 2007 Mar 5; 103(5):3129-33; doi:  https://doi.org/10.1002/app.24751 
  30. Sekkar V, Narayanaswamy K, Scariah KJ, Nair PR, Sastri KS, Ang HG, “Studies on urethane–allophanate networks based on hydroxyl‐terminated polybutadiene: Modeling of network parameters and correlation to mechanical properties”, Journal of applied polymer science, 2006 Sep 5; 101(5):2986-94, doi : https://doi.org/10.1002/app.23541 
  31. Sekkar V, Gopalakrishnan S, Ambika Devi K, “Studies on allophanate–urethane networks based on hydroxyl terminated polybutadiene: effect of isocyanate type on the network characteristics”, European Polymer Journal, 2003 Jun 1; 39(6):1281-90; doi: https://doi.org/10.1016/S0014-3057(02)00364-6 
  32. V.Sekkar, S.Venkatachalam, and K.N.Ninan; “Rheokinetic studies on the formation of urethane networks based on based on  Hydroxyl terminated polybutadiene”,    European Polymer Journal, 38, (2001) pp.169-178; doi: https://doi.org/10.1016/S0014-3057(01)00106-9 
  33. V.Sekkar, K.Ambika Devi and K.N.Ninan, “Rheokinetic evaluation on the formation of urethane networks based on hydroxyl terminated polybutadiene”, J.Appl.Polym.Sci., 79, (2001) pp. 1869-1876; doi: https://doi.org/10.1002/1097-4628(20010307)79:10<1869::AID-APP160>3.0.CO;2-7 
  34. V.Sekkar, K.N.Ninan, V.N.Krishnamurthy and  S.R.Jain, “Thermal decomposition studies on copolyurethanes based on hydroxyl terminated polybutadiene and poly (12-hydroxy stearic acid-co-TMP)ester polyol”, Eur.Polym.J., 36, (2000) pp. 2437-2448; doi: https://doi.org/10.1016/S0014-3057(00)00043-4
  35. V.Sekkar, S.S.Bhagwan, N.Prabhakaran, M.Rama Rao, and K.N.Ninan, “Polyurethanes  based on  hydroxyl terminated polybutadiene: Modelling  of network parameters and correlation with mechanical properties”, Polymer, 41, (2000) pp. 6773-6786; doi: https://doi.org/10.1016/S0032-3861(00)00011-2 
  36. V.Sekkar, V.N.Krishnamurthy and  S.R.Jain, “Characterization of copolyurethanes   based on hydroxyl terminated polybutadiene and poly (12-hydroxy stearic acid-co-TMP)ester polyol as propellant binders : correlation between the resin structural characteristics and ultimate propellant mechanical properties”, Propellants, Explosives, Pyrotecnics, 23, (1998) pp. 246-253; doi: https://doi.org/10.1002/(SICI)1521-4087(199811)<246::AID-PREP246>3.0.CO;2-%23 
  37. V.Sekkar, V.N.Krishnamurthy and  S.R.Jain, “Mechanical and swelling properties of copolyurethanes based on hydroxyl terminated polybutadiene and its hydrogenated analog”, Propellants, Explosives, Pyrotecnics, 22, (1997) pp. 289-295; doi: https://doi.org/10.1002/prep.19970220508 
  38. V,Sekkar, V.N.Krishnamurthy and S.R.Jain, “Kinetics of copolyurethane network formation”, J.Appl.Polym.Sci., 66, (1997) pp. 1795; doi:  . https://doi.org/10.1002/(SICI)1097-4628(19971128)66:9<1795::AID-APP19>3.0.CO;2-U 
  39. V,Sekkar, M.Rama Rao, V.N.Krishnamurthy and S.R.Jain, “Modelling of polyurethane networks based on hydroxyl terminated polybutadiene and poly (12-hydroxy stearic acid-co-TMP)ester polyol: Correlation of network parameters with mechanical properties”, J.Appl.Polym.Sci., 62,  (1996). pp. 2317; doi: https://doi.org/10.1002/(SICI)1097-4628(19961226)62:13<2317::AID-APP17>3.0.CO;2-%23 
  40. V.Sekkar, K.J.Scariah and M.Rama Rao, “Thermal degradation behaviour of copolyurethanes based on hydroxyl terminated polybutadiene and its hydrogenated analogs”, Eur.Polym.J., Vol.30, No.8, (1995) pp. 925-931; doi: https://doi.org/10.1016/0014-3057(94)90026-4 
  41. V.Sekkar, S.R.Jain and V.N.Krishnamurthy “Mechanical and swelling properties of HTPB based copolyurethane networks”, J.Appl.Polym.Sci., 48, (1993). pp. 1515-1523; doi: https://doi.org/10.1002/app.1993.070480902 
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