Preparation and Properties of Phosphonated Polysiloxane Proton Exchange Membrane

Bo Liu; Fang Liu; Gui-bao Guo

doi:10.11777/j.issn1000-3304.2025.25186

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Preparation and Properties of Phosphonated Polysiloxane Proton Exchange Membrane

Research Article | 更新时间：2026-03-23

- Preparation and Properties of Phosphonated Polysiloxane Proton Exchange Membrane
- Acta Polymerica Sinica Vol. 57, Issue 3, Pages: 819-827(2026)
- 作者机构：
  
  内蒙古科技大学化学与化工学院包头 014010
- 作者简介：
  
  Fang Liu, E-mail: liuf5483@163.com
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25186
  CLC：
- CSTR：32057.14.GFZXB.2025.7504
- Received：11 August 2025，
  
  Accepted：20 October 2025，
  
  Online First：14 January 2026，
  
  Published：20 March 2026
- 稿件说明：
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刘博, 刘芳, 郭贵宝. 膦化聚硅氧烷质子交换膜的制备及其性能研究. 高分子学报, 2026, 57(3), 819-827.

Liu, B.; Liu, F.; Guo, G. B. Preparation and properties of phosphonated polysiloxane proton exchange membrane. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 819-827.
刘博, 刘芳, 郭贵宝. 膦化聚硅氧烷质子交换膜的制备及其性能研究. 高分子学报, 2026, 57(3), 819-827. DOI： 10.11777/j.issn1000-3304.2025.25186. CSTR： 32057.14.GFZXB.2025.7504.

Liu, B.; Liu, F.; Guo, G. B. Preparation and properties of phosphonated polysiloxane proton exchange membrane. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 819-827. DOI： 10.11777/j.issn1000-3304.2025.25186. CSTR： 32057.14.GFZXB.2025.7504.

摘要

通过膦化反应，将膦酸基团化学键合到3-氨丙基(二乙氧基)甲基硅烷(3-APDEMS)上，经水解后与硼酸反应，构建了膦化聚硅氧烷交联网络，与壳聚糖复合，成功制备了膦化聚硅氧烷/壳聚糖复合质子交换膜(PBS-PA/CS). 采用傅里叶变换红外光谱(FTIR)和能谱扫描电子显微镜(EDS)对膜的微观结构、表面形貌及元素分布进行了表征. 系统研究了磷酸含量对膜电导率的影响. 实验结果表明：磷酸通过N―C―P键成功接枝到3-APDEMS上，磷元素在膜中分布均匀. 该复合膜表现出优异的热稳定性(200 ℃质量损失约6%)和适中的吸水率(25 ℃时低于15%). 在140 ℃无增湿条件下，质子电导率达63 mS/cm，单电池测试显示开路电压为0.88 V，最大功率密度达到420.2 mW/cm

，展现出良好的高温低湿应用性能.

Abstract

The phosphonyl groups were covalently grafted onto 3-aminopropyl(diethoxymethyl)silane (3-APDEMS)

via

a phosphonylation reaction. A phosphonated polysiloxane network was prepared by dehydration condensation

and the network was subsequently blended with chitosan to fabricate the phosphonated polysiloxane/chitosan composite proton exchange membrane (PBS-PA/CTS). The microstructure

surface morphology

and elemental distribution of membrane were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy with energy-dispe

rsive X-ray spectroscopy (SEM-EDS). The effect of phosphoric acid loading on the proton conductivity of membrane was systematically investigated. The results confirmed the successful grafting of phosphoric acid onto 3-APDEMS

via

N―C―P bonds

with uniform phosphorus distribution throughout the membrane. The composite membrane demonstrated excellent thermal stability (about 6% mass loss at 200 ℃) and moderate water uptake (

15% at 25 ℃). Under anhydrous conditions at 140 ℃

the proton conductivity achieved 63 mS/cm

while single-cell tests yield an open-circuit voltage of 0.88 V and a maximum power density of 420.2 mW/cm

indicating excellent performance under high-temperature

low-humidity conditions.

关键词

Keywords

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