Pervaporation performance of carbon nanotube filled PDMS membranes

doi:10.3969/j.issn.0438-1157.2014.01.035

CIESC Journal ›› 2014, Vol. 65 ›› Issue (1): 271-278.DOI: 10.3969/j.issn.0438-1157.2014.01.035

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Pervaporation performance of carbon nanotube filled PDMS membranes

HAN Xiaolong^1,2, ZHANG Xingmei^1,3, MA Xiaoxun¹, LI Jiding²

1 School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China;
2 State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3 Department of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China

Received:2013-07-01 Revised:2013-11-25 Online:2014-01-05 Published:2014-01-05
Supported by:
supported by the State Key Laboratory of Chemical Engineering（SKL-ChE-12A01）, the National High Technology Research and Development Program of China (2012AA03A607), and NWU Young Teachers Scientific Research Foundation (PR13022).

碳纳米管填充PDMS膜的渗透汽化性能

韩小龙^1,2, 张杏梅^1,3, 马晓迅¹, 李继定²

1 西北大学化工学院, 陕西西安 710069;
2 清华大学化学工程系, 化学工程联合国家重点实验室, 北京 100084;
3 宝鸡文理学院化学化工学院, 陕西宝鸡 721013

通讯作者: 韩小龙
作者简介:韩小龙（1976-），男，博士，讲师。
基金资助:
化学工程联合国家重点实验室开放课题项目（SKL-ChE-12A01）；国家高技术研究发展计划项目（2012AA03A607）；陕西省教育厅项目（2010JK408）；西北大学科研启动基金项目（PR13022）。

Abstract

Abstract: Single wall carbon nanotubes (SWNT), multiwall carbon nanotubes (MWNT) and dodecyltrichlorosilane modified MWNT were incorporated into polydimethylsiloxane (PDMS) for separation of ethanol/water mixture via pervaporation. The pervaporation results showed that separation performance of MWNT/PDMS hybrid membrane was better than that of SWNT/PDMS hybrid membrane. When MWNT/PDMS hybrid membranes were used to separate 5%(mass) ethanol aqueous solution at 40℃, a separation factor of 10.0 and total flux of 206.2 g·(m²·h)^-1 were observed. The pervaporation selectivity of MWNT/PDMS membrane could be effectively improved by dodecyltrichlorosilane modification, and the modified MWNT/PDMS hybrid membrane showed a separation factor of 11.3 and total flux of 130.9 g·(m²·h)^-1 for 5%(mass) ethanol feed concentration at 40℃.

Key words: membranes, separation, pervaporation, carbon nanotubes, PDMS

摘要： 将碳纳米管（CNTs）填充到PDMS中制备出CNTs/PDMS杂化膜，并将其用于乙醇/水体系的分离，发现由多壁碳纳米管制备的膜分离性能优于单壁碳纳米管填充膜，在40℃下，进料乙醇浓度为5%（质量分数）时，膜的分离因子可由8.3提高到10.0，渗透通量为206.2 g·（m²·h）^-1；采用十二烷基三氯硅烷对多壁碳纳米管进行修饰，并对修饰前后碳纳米管的性能进行表征，研究表明修饰后碳纳米管表面形成疏水层，碳纳米管的疏水性增强；将修饰后的碳纳米管填充到PDMS中，可进一步提高杂化膜对乙醇的选择性，膜的分离因子可提高到11.3，渗透通量为130.9 g·（m²·h）^-1。

关键词: 膜, 分离, 渗透蒸发, 碳纳米管, 聚二甲基硅氧烷

CLC Number:

TQ028.8

HAN Xiaolong, ZHANG Xingmei, MA Xiaoxun, LI Jiding. Pervaporation performance of carbon nanotube filled PDMS membranes[J]. CIESC Journal, 2014, 65(1): 271-278.

韩小龙, 张杏梅, 马晓迅, 李继定. 碳纳米管填充PDMS膜的渗透汽化性能[J]. 化工学报, 2014, 65(1): 271-278.

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Pervaporation performance of carbon nanotube filled PDMS membranes

碳纳米管填充PDMS膜的渗透汽化性能

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