Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery

DU Guangqing; CHEN Lijie; XUE Chuang; BAI Fengwu

doi:10.3969/j.issn.0438-1157.2014.09.026

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Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery

更新时间：2025-12-10

- Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery
- CIESC Journal Issue 9, Pages: 3499-3504(2014)
- 作者机构：
  
  大连理工大学生命科学与技术学院,辽宁,大连,116023
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.09.026
  CLC： 939.9
- Online First：05 September 2014，
  
  Published：05 September 2014
- 稿件说明：
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DU Guangqing, CHEN Lijie, XUE Chuang, et al. Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery[J]. CIESC Journal, 2014, (9): 3499-3504.
DOI：

DU Guangqing, CHEN Lijie, XUE Chuang, et al. Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery[J]. CIESC Journal, 2014, (9): 3499-3504. DOI： 10.3969/j.issn.0438-1157.2014.09.026.

摘要

通过相转化法制备PVDF多孔支撑膜，在其上涂覆致密的PDMS分离层制备得到PVDF/PDMS复合膜，用于丁醇的分离纯化。以丁醇水溶液为原料液，流速为1.6 L·min-1，丁醇浓度为15 g·L-1，温度为37℃时， PVDF/PDMS复合膜的总通量为158.2 g·m-2·h-1，分离因子为17.3。向丁醇水溶液中按丁醇：丙酮：乙醇比例为6：3：1添加丙酮和乙醇模拟发酵液，PVDF/PDMS复合膜的总通量升高到189.5 g·m-2·h-1，分离因子降低到14.8。进一步考察了以丙酮-丁醇-乙醇（ABE）发酵液为原料液的渗透气化膜分离性能，发酵液中不存在菌体时，PVDF/PDMS复合膜的总通量和分离因子分别为120.2 g·m-2·h-1和19.7，而菌体存在时，复合膜的总通量和分离因子分别为122.1 g·m-2·h-1和16.7。与PDMS均质膜相比，PVDF/PDMS复合膜在丁醇分离过程中的分离性能有了显著的提升，具有潜在的应用价值。

Abstract

A polyvinylidene fluoride (PVDF)/polydimethylsiloxane (PDMS) composite membrane for butanol recovery was fabricated by coating a dense PDMS separation layer on a PVDF porous support layer prepared by phase inversion. The total flux and separation factor of the PVDF/PDMS composite membrane could be 158.2 g·m-2·h-1 and 17.3

respectively

when feed solution was 15 g·L-1 butanol at 37℃ with a flow rate 1.6 L·min-1. To simulate the fermentation liquor

acetone and ethanol were added into the feed solution in a ratio 6(butanol):3:1

the total flux of PVDF/PDMS composite membrane increased to 189.5 g·m-2·h-1

but separation factor decreased to 14.8. Furthermore

fermentation broths with/without biomass as feed solution were investigated to evaluate pervaporation performance of the PVDF/PDMS composite membrane. The total flux and separation factor were 120.2 g·m-2·h-1 and 19.7 for without biomass case

122.1 g·m-2·h-1 and 16.7 for with biomass case

respectively. Compared with PDMS membrane

the performance of PVDF/PDMS composite membrane had significant improvement for butanol recovery

indicating that it is of potential for industrial application of butanol recovery.

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