Degradation mechanism of silicone rubber in simulated PEM fuel cell environment

doi:10.3969/j.issn.0438-1157.2014.09.049

CIESC Journal ›› 2014, Vol. 65 ›› Issue (9): 3669-3675.DOI: 10.3969/j.issn.0438-1157.2014.09.049

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Degradation mechanism of silicone rubber in simulated PEM fuel cell environment

LI Guo¹, TAN Jinzhu², GONG Jianming², JIA Wenhua¹

1 School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China;
2 School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 211816, Jiangsu, China

Received:2014-01-07 Revised:2014-05-30 Online:2014-09-05 Published:2014-09-05
Supported by:
supported by the Research Foundation for Talented Scholars of Nanjing Institute of Technology (YKJ201304), the Natural Science Foundation of Jiangsu Province (SBK201343507), the Natural Science Fund of Colleges and Universities of Jiangsu Province (13KJB460009) and the Research Foundation for Talented Scholars of Nanjing Institute of Technology (QKJA201201).

硅橡胶在模拟PEM燃料电池环境下的损伤机理

李果¹, 谈金祝², 巩建鸣², 贾文华¹

1 南京工程学院机械工程学院, 江苏南京 211167;
2 南京工业大学机械与动力工程学院, 江苏南京 211816

通讯作者: 李果
基金资助:
南京工程学院引进人才科研启动基金项目（YKJ201304）；江苏省自然科学青年基金项目（SBK201343507）；江苏省高校自然科学基金项目（13KJB460009）；南京工程学院青年基金项目（QKJA201201）。

Abstract

Abstract: Elastomer material gasket as an important component works in proton exchange membrane (PEM) fuel cell under moist, acidic conditions. The evolution process of the material's chemical degradation plays a fundamental role in studying the performance of mechanical seal gasket material and its life prediction. The chemical process of the elastomer material was analyzed by using X-ray photoelectron spectroscopy (XPS). The degradation mechanism was mainly molecular chain scission in the backbone and side chain and hydrolysis of crosslinking.

Key words: silicone rubber, fuel cell, degradation, mechanical properties, XPS

摘要： 弹性体材料垫片作为PEM燃料电池中一个重要构件，长期服役在PEM燃料电池潮湿、偏酸性环境下，其化学损伤过程是如何演变的对于研究垫片材料的机械密封性能、预测垫片材料的寿命起着基础性作用。采用先进材料测试分析方法XPS技术研究了弹性体材料在模拟的燃料电池环境中的化学降解过程，从分子角度揭示了材料化学损伤的机理主要是材料分子主链的断裂、侧链的断裂及交联区的水解。

关键词: 硅橡胶, 燃料电池, 降解, 力学性能, XPS

CLC Number:

TK91

LI Guo, TAN Jinzhu, GONG Jianming, JIA Wenhua. Degradation mechanism of silicone rubber in simulated PEM fuel cell environment[J]. CIESC Journal, 2014, 65(9): 3669-3675.

李果, 谈金祝, 巩建鸣, 贾文华. 硅橡胶在模拟PEM燃料电池环境下的损伤机理[J]. 化工学报, 2014, 65(9): 3669-3675.

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Degradation mechanism of silicone rubber in simulated PEM fuel cell environment

硅橡胶在模拟PEM燃料电池环境下的损伤机理

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