文献类型：期刊文献

英文题名：PFSA-TiO2(or Al2O3)-PVA/PVA/PAN difunctional hollow fiber composite membranes prepared by dip-coating method

作者：Ma, Xiao-Hua[1,2]; Xu, Zhen-Liang[1,2]; Wu, Fan[2]; Xu, Hai-Tao[2]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology [ECUST], Shanghai 200237, China; [2] Membrane Science and Engineering RandD Laboratory, Chemical Engineering Research Center, ECUST, Shanghai 200237, China

年份：2012

卷号：21

期号：1

起止页码：31

外文期刊名：Iranian Polymer Journal (English Edition)

收录：EI(收录号：20121914995134)

语种：英文

外文关键词：Ethanol - Acetic acid - Composite membranes - Esterification - Separation - pH - Titanium dioxide - Catalyst activity - Alumina - Catalyst selectivity - Esters - Aluminum oxide - Fibers - Fourier transform infrared spectroscopy

摘要：PFSA-TiO2(or Al2O3)-PVA/PVA/PAN difunctional hollow fiber composite membranes with separation performance and catalytic activity have been prepared by dip-coating method. The good separation performance was brought about by the glutaraldehyde (GA) surface crosslinked PVA/PAN composite membrane, and the good catalytic activity of the membrane was achieved by the perfluorosulphonic acid (PFSA) used. The difunctional hollow fiber membranes were characterized by XRD, TGA, EDX, SEM, and FTIR. The separation performance was measured by dehydration of azeotropic top product of ethanol-acetic acid esterification, and the catalytic activity was obtained by investigating the esterification of ethanol and acetic acid. The FTIR spectra and the morphologies of difunctional hollow fiber composite membranes were similar for samples prior to esterification and post-esterification with ethanol and acetic acid for 24 h. Difunctional hollow fiber composite membranes with 2% PFSA, 8% TiO2 (named as DM-T1), and 2% PFSA, 8% Al2O3 (named as DM-A1) (all by weights) showed the best catalytic activity. They displayed fluxes of 165 and 173 g/m2 h, separation factors of water to ethanol of 279 and 161, PFSA contents in difunctional hollow fiber composite membrane of 3.2 and 2.4%, the ratios of PFSA to feed solution (acetic acid-ethanol) of 0.031 and 0.023%, and the equilibrium conversion of ethanol at 53.5 and 57.6%, in the given order for TiO2 and Al2O3 containing samples. ? Iran Polymer and Petrochemical Institute 2011.