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

• 分离工程 • 上一篇    下一篇

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. 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
  • 收稿日期:2013-07-01 修回日期:2013-11-25 出版日期:2014-01-05 发布日期:2014-01-05
  • 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)。

Pervaporation performance of carbon nanotube filled PDMS membranes

HAN Xiaolong1,2, ZHANG Xingmei1,3, MA Xiaoxun1, LI Jiding2   

  1. 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).

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

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

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