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Preparation of hybrid PEBA/MCM-41 membranes and its pervaporation performances for separating phenol/water mixture

Authors： WANG Minmin, ZHANG Xinru, HAO Xiaogang, LI Chuncheng, DING Chuan, WANG Qian

Units： College of chemistry and chemical engineering，Taiyuan University of Technology，Taiyuan 030024，Shanxi，China

KeyWords： MCM-41；poly(ether-block-amide)；phenol；pervaporation

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2015,35(6):40-47

Abstract：

：Mesoporous MCM-41 filled poly(ether-block-amide)(PEBA2533) membranes were prepared for pervaporation separation of phenol from dilute aqueous solutions. The structural morphology and thermal stability of these hybrid membranes were characterized by SEM, FT-IR and TGA. The effects of MCM-41 content on the sorption, diffusion and pervaporation performances were investigated. The results showed that the swelling degree and diffusion separation factor of PEBA/MCM-41 membranes increased. When the MCM-41 content was 4%, the membrane’s swelling degree increased by 43% compared with that of plain PEBA. With the increase of MCM-41 content, PEBA/MCM-41 membranes displayed significantly improved permeation flux and almost equivalent phenol/water separation factor. The hybrid membrane containing 4 wt% MCM-41 showed the best pervaporation performance with increasing phenol flux by 21%. The diffusion coefficients of phenol and water were also estimated by Fick’s first law, which suggests that using a mesoporous molecular sieve as the filler could enhance penetration of the polymer. Effects of operating conditions on the separation performance have been systematically assessed. It was found that the permeation flux increased while the separation factor decreased with the increase of feed concentration. All the hybrid membranes demonstrated increasing separation factor and permeation flux with increasing temperature.

Funds：

山西省回国留学人员科研资助项目（2013051）

AuthorIntro：

王敏敏（1989-），女，山东菏泽人，硕士研究生，从事渗透汽化膜研究. ＊通讯作者，Email：xghao@tyut.edu.cn

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