Start
Apr 01, 2011 - 16:00
End
Apr 01, 2011 - 17:00
Venue
Creativity hall (Room 118) Chemical Eng.
Event Type
Speaker
Dr. Jaydevsinh M. Gohil Post Doctoral Fellow Chemical Engineering Department indian Institute of Technology Bombay
Title
Reverse osmosis thin film composite membranes: Studies into structure property and function
Abstract: The membrane technologies have made great progress in the desalination field. Thin film composite (TFC) reverse osmosis (RO) and nanofiltration (NF) membranes have been widely applied not only to seawater desalination but also to brackish water desalination and industrial and waste water treatment. TFC membrane is produced by in-situ interfacial polycondensation (IP) reaction between monomeric polyamine (m-phenylene diamine MPD) and polyfunctional acid halide (trimesoyal chloride TMC) on finely porous base membranes to deposit a thin film barrier layer whose properties determine the desalination performance of the membrane. In this study we first determine the optimum window of MPD and TMC concentration with water flux and salt rejection as target variables. For this purpose we conduct TFCM synthesis experiments with aqueous and organic phase monomer concentration each at five different concentration levels. Flux and rejection data obtained were statistically analysed to study the effect of individual concentration its interaction and experimental error. The effect of MPD and TMC on flux and rejection were correlated with measured membrane properties. Using optimum concentration window of MPD and TMC different thin film composite and nanocomposite (TFNC) membranes were prepared by incorporation of additives and nanoparticles to identify promising recipes. New methods have been developed to measure thickness of the thin polyamide layer using AFM and profilometry. Advantage of this method is that it is very simple compare to TEM technique which require high expertise in sample preparation and microtoming. To correlate IP reaction kinetics with TFCM’s structue and properties new method have been identified to study the kinetics of IP reaction.About the speaker: Jaydevsinh M Gohil is currently working as Post Doctoral Fellow at the Indian Institute of Technology Bombay. He joined IIT Bombay in March 2009. He graduated in Applied Chemistry (B.Sc.) from N. V. Patel college of pure and applied science Sardar Patel University V. V. Nagar Anand in 2000 and completed his Master’s in Plastics Technology (M.Sc.) from the Institute of Science and Technology for Advance Studies and Research Sardar Patel University V. V. Nagar Anand in 2002. He obtained his Ph. D degree in chemistry in 2008 affiliated to Bhavnagar University while working as senior research fellow at Central salt and marine chemicals research institute (CSIR lab) Bhavnagar. His research interests are: The fundamentals of interfacial polymerisation and thin film composites and nanocomposites reverse osmosis nanofiltration membrane; ion exchange membranes; and modification of water-soluble polymers for membranes application.