文献类型：期刊文献

英文题名：Preparation and characterization of PFSA-PVA-SiO₂/PVA/PAN difunctional hollow fiber composite membranes

作者：Ma, Xiao-Hua[1,2];Xu, Zhen-Liang[1,2];Liu, Yang[1];Sun, De[1]

机构：[1]ECUST, Membrane Sci & Engn R&D Lab, Chem Engn Res Ctr, Shanghai 200237, Peoples R China;[2]ECUST, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：360

期号：1-2

起止页码：315

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000280311500036)】；

基金：The authors acknowledge the Key Technology R&D Program of China (2006BAE02A01) and Chemistry & Chemical Technology Research Center Plan of Shanghai Huayi Group Company (A200-8608 and A200-80726) for giving financial supports in this project.

语种：英文

外文关键词：Difunctional hollow fiber composite; membrane; Preparation; Characterization; Pervaporation; Esterification

摘要：Perfluorosulfonic acid-poly(vinyl alcohol)-SiO2/poly(vinyl alcohol)/polyacrylonitrile (PFSA-PVA-SiO2/PVA/PAN) difunctional hollow fiber composite membranes (DHFCMs) with catalytic activity and selectivity have been prepared by dip-coating method. Both layers of DHFCMs were optimized independently. Firstly, separation-function hollow fiber composite membranes (SHFCMs) were prepared. The effects of different glutaraldehyde (GA) concentrations on SHFCMs and morphologies were investigated by FTIR and SEM. The separation performances of SHFCMs were measured by dehydrating the top product (water, ethanol and ethyl acetate ternary azeotropic system) of reactive distillation. Secondly, DHFCM was prepared by casting PFSA-PVA-SiO2 catalytic solution on the top layer of SHFCM-4 with the best separation performance. The effects of different PFSA and nano-SiO2 concentrations on DHFCMs, morphologies, element distribution, crystal structures and weight loss were investigated by FTIR, SEM, EDX, XRD and TGA. DHFCMs were evaluated by dehydrating the top product of reactive distillation and esterification reaction with acetic acid and ethanol. It was found that DHFCMs had better separation performances than single-separation-function HFCMs. DHFCMs with different PFSA and nano-SiO2 concentrations manifested similar catalytic activity. DHFCM-1 had flux of 162 g/(m(2) h), separation factor of water to ethanol of 379, no ethyl acetate in the permeate. DHFCM made from DHCM-1 had the best separation performance and catalytic activity. (C) 2010 Elsevier B.V. All rights reserved.