Pervaporation performance of carbon nanotube filled PDMS membranes

HAN Xiaolong; ZHANG Xingmei; MA Xiaoxun; LI Jiding

doi:10.3969/j.issn.0438-1157.2014.01.035

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Pervaporation performance of carbon nanotube filled PDMS membranes

更新时间：2025-12-10

- Pervaporation performance of carbon nanotube filled PDMS membranes
- CIESC Journal Issue 1, Pages: 271-278(2014)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.01.035
  CLC： Q028.8
- Online First：05 January 2014，
  
  Published：05 January 2014
- 稿件说明：
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HAN Xiaolong, ZHANG Xingmei, MA Xiaoxun, et al. Pervaporation performance of carbon nanotube filled PDMS membranes[J]. CIESC Journal, 2014, (1): 271-278.
DOI：

HAN Xiaolong, ZHANG Xingmei, MA Xiaoxun, et al. Pervaporation performance of carbon nanotube filled PDMS membranes[J]. CIESC Journal, 2014, (1): 271-278. DOI： 10.3969/j.issn.0438-1157.2014.01.035.

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。

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℃.

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