Abstract Mesoporous MCM-41 silica was modified by silylation using Chlorotrimethylsilane (CTMS) and was characterized by Fourier transform infrared (FTIR), Contact angle measurements (CA), X-ray Diffraction (XRD) and Thermal gravimetric analysis (TGA). The results showed that mesoporous MCM-41 became hydrophobic after modification without obvious damaged framework. The modified mesoporous MCM-41 silica was for the first time filled into poly(dimethylsiloxane) (PDMS) polymers and the composite membranes prepared in this work were employed in pervaporation separation of dimethylcarbonate/methanol azeotropic mixture. Both separation factor and total flux were increased simultaneously.Key words : MCM-41 silica; silylation; Poly(dimethylsiloxane); PervaporationThe authors greatly appreciate the financial supports of the Major State Basic Research Program of China (2009CB623404), National Natural Science Foundation of China (20736003, 21176135)

Modified mesoporous silica filled PDMS membrane for dimethylcarbonate -methanol separation via pervaporation

243rd National Meeting (2012)

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