Preparation and Properties of Polysulfone/Poly(vinyl alcohol) Composite Anion Exchange Membrane for Fuel Cells

Zong-wen QIAO; Tao CHEN

doi:10.14028/j.cnki.1003-3726.2022.11.009

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Preparation and Properties of Polysulfone/Poly(vinyl alcohol) Composite Anion Exchange Membrane for Fuel Cells

更新时间：2022-09-09

- Preparation and Properties of Polysulfone/Poly(vinyl alcohol) Composite Anion Exchange Membrane for Fuel Cells
- Polymer Bulletin Vol. 35, Issue 11, Pages: 90-96(2022)
- 作者机构：
  
  1.陕西国防工业职业技术学院化工学院,西安 710300
  2.中北大学化学工程学院,太原 030051
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2022.11.009
  CLC：
- Published：20 November 2022，
  
  Received：10 August 2021，
  
  Revised：14 March 2022，
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Zong-wen QIAO, Tao CHEN. Preparation and Properties of Polysulfone/Poly(vinyl alcohol) Composite Anion Exchange Membrane for Fuel Cells. [J]. Polymer Bulletin 35(11):90-96(2022)
DOI：

Zong-wen QIAO, Tao CHEN. Preparation and Properties of Polysulfone/Poly(vinyl alcohol) Composite Anion Exchange Membrane for Fuel Cells. [J]. Polymer Bulletin 35(11):90-96(2022) DOI： 10.14028/j.cnki.1003-3726.2022.11.009.

摘要

在制备氯甲基化聚砜(CPSF)的基础上

CPSF与4-(咪唑-1基)苯甲醛反应制备得到侧链含有醛基的季铵化聚砜(PSF-BA)

接着PSF-BA与聚乙烯醇(PVA)通过化学反应制备一种交联型聚砜/聚乙烯醇聚砜阴离子交换膜(PSF-VA)

在用红外光谱(FT-IR)表征其化学结构的基础上

重点研究了阴离子交换膜的吸水率 (water uptaking

WU)、尺寸稳定性和耐碱性等性能。本文的PSF-VA复合阴离子交换膜在高吸水率下仍能保持很好的尺寸稳定性、耐碱性和机械性能

其中PSF-VA-3膜的离子交换容量(IEC)高达1.47 mmol/g

PSFAC- 3膜在25 和85 ℃ 的吸水率(WU)达到了 29.9% 和47.6%

相应的氢氧根离子传导率为0.041 和 0.090 S/cm

但是溶胀率(SR)仅为13.7%和36.8%。在强碱中浸泡30天的氢氧根离子传导率保留量达到了 84.7%

高传导率下保持很好的尺寸稳定性和耐碱性

克服了阴离子交换膜(AEM)在高离子传导率下尺寸稳定性和耐碱性差的问题。

Abstract

A kind of quaternary ammonium polysulfone (PSF-BA) containing an aldehyde group on the side chain was obtained by the reaction of CPSF and 4-(imidazole-1-yl) benzaldehyde based on the preparation of chloromethylated polysulfone (CPSF). Subsequently

cross-linked polysulfone/poly(vinyl alcohol) anion exchange membrane (PSF-VA) was fabricated by the reaction of PSF-BA with polyvinyl alcohol (PVA). The chemical structure of modified polymer was characterized by infrared spectroscopy (FT-IR)

and water uptaking (WU)

size stability and alkali resistance were explored. PSF-VA composite AEMs keep excellent dimensional stability

alkali resistance and mechanical properties under high water absorption. The water absorption of PSF-AC-3 AEM (IEC is 1.47 mmol/g) at 25 and 85 ℃ is 29.9% and 47.6%

the hydrogen ion conductivity is 0.041 and 0.090 S/cm

but the swelling ratio is only 13.7% and 36.8%. The properties are even better than those of Nafion115 membrane under the same conditions. The PSF-AC AEM keeps good dimensional stability and alkali resistance at high conductivity

and the retention of ion conductivity is up to 84.7% after being soaked in strong alkali for 30 days

overcoming the problems of poor dimensional stability and alkali resistance of AEM under high ionic conductivity.

关键词

聚砜聚乙烯醇季铵化交联结构尺寸稳定性耐碱性

Keywords

PolysulfonePoly(vinyl alcohol)Quaternary ammoniumCrosslinked structureDimensional stabilityAlkali resistance

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