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Novel Carbon Nanotube/Chitosan Hybrid Membranes for Pervaporation of Ethanol/Water Mixtures

Authors： SHI Guozhong, WU Liguang, QIU Shi, ZHANG Lin, CHEN Huanlin, GAO Congjie

Units： 1Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China;2College of Envir. Sci. & Eng., Zhejiang Gongshang University, Hangzhou, 310012, China;3National Engineering Research Center for Liquid Separation Membrane, Hangzhou, 310012, China

KeyWords： multi-walled carbon nanotubes; chitosan; hybrid membrane; pervaporation; ethanol/water mixtures

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2011,31(4):54-59

Abstract：

multi-walled carbon nanotube(MWNT) was modified by H2SO4/HNO3 mixture and then loaded into chitosan(CS) to prepare MWNT-COOH/CS hybrid membrane for pervaporation dehydration of ethanol/water mixtures. The structure of MWNT、MWNT-COOH and hybrid membrane were characterized by transmission electron microscopy(TEM) and FTIR, and the results show that the modification of MWNT promoted the dispersion of MWNT-COOH in the membrane matrix. The diffusion coefficient of water in the hybrid membrane was higher than that of ethanol, diffusion selectivity(αD,w/e) and solubility selectivity(αS,w/e) increased with the increasing MWNT-COOH content in the membrane matrix based on the sorption experiment. For pervaporation of 90wt% ethanol/water mixtures, the permeation flux of the hybrid membrane increased, selectivity (αw/e) slightly decreased with the increasing MWNT-COOH content in the membrane matrix.

Funds：

973计划项目(No.2009CB623402)，浙江省自然科学基金项目(No.Y407230)。

AuthorIntro：

施国忠（1985-），男，浙江湖州人，硕士研究生，主要从事渗透汽化膜研究. *通讯联系人。

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