Improvement of Reverse Osmosis Membrane by Grafting Hydrophilic Hydrocarbon on Membrane Surface

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Mortazavi, Sajad | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47735 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Mousavi, Abbas; Ramezani Saadat Abadi, Ahmad
Abstract:
In this study, surface modification of Thin-film composite (TFC) membranes was performed in order to enhancement of its performance and chlorine resistance. TFC membranes was prepared through the interfacial polymerization between m-phenylenediamine (MPD) and trimesoyl chloride (TMC) on the polysulphone support membrane and surface modification performed through redox initiated graft polymerization of acrylic amide followed by acrylic acid. The successful surface modification of TFC membranes was evident from attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), contact angle (θ), scanning electron microscope (SEM) and atomic force microscope (AFM). Changes in surface characteristics confirmed the graft polymerizations of acrylic amide and acrylic acid.The surface of the membrane became more hydrophilic after modification and modified membrane showed more hydrophilic surface and increased salt rejection.The chlorine stability test at accelerated conditions clearly indicated enhanced chlorine resistance by the modified membranes compared to unmodified membrane
Keywords:
Surface Functionality ; PLUGGING ; Free Radical Grafting ; Thin-film Composite Membrane ; Chlorine Resistance

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