在模拟PEMFC环境和载荷共同作用下垫片材料的化学损伤研究  

Study on chemical damage of gasket materials under combined action of simulated PEMFC environment and compressive load

作　　者：赵嘉平 韦彦强 冯一帆 张思琪 储俊 谈金祝[1] ZHAO Jiaping;WEI Yanqiang;FENG Yifan;ZHANG Siqi;CHU Jun;TAN Jinzhu(College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing Jiangsu 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《电源技术》2025年第3期615-623,共9页Chinese Journal of Power Sources

基　　金：国家自然科学基金(52275152)。

摘　　要：以质子交换膜燃料电池(PEMFC)的密封垫片为研究对象,通过实验方法对处于模拟PEMFC环境和压缩载荷共同作用下垫片材料(硅橡胶弹性体材料)的化学损伤情况进行研究。利用衰减全反射傅里叶变换红外光谱(ATR-FTIR)技术和X射线光电子能谱(XPS)技术从材料的分子结构分析垫片材料老化前后的化学损伤情况,并利用光学显微镜观察材料老化前后的表面微观形貌变化。实验结果表明,在模拟PEMFC环境和压缩载荷共同作用下,硅橡胶垫片材料的表面会出现化学损伤,分子结构发生了变化,材料表面的高分子主链产生断裂,高分子的交联区会发生水解,同时会生成新的物质SiO2。压缩载荷的增大和老化时间的增加会加剧硅橡胶垫片材料的损伤。Study on the sealing gasket of the proton exchange membrane fuel cell(PEMFC),the chemical damage situation of the gasket material(silicone rubber elastomer material)under the combined action of the simulated PEMFC environment and the compressive load was studied by the experimental method.The attenuated total reflection-fourier transform infrared spectroscopy(ATR-FTIR)technology and X-ray photoelectron spectroscopy(XPS)technology were used to analyze the chemical damage of the gasket material before and after aging of the material,and to observe the surface micromorphology changes of the material before and after aging by optical microscope.The results of ATR-FTIR and XPS experiments show that under the combination of PEMFC environment and compressive load,the surface of the silicone rubber cushion material will appear chemical damage,the molecular structure will change,the polymer backbone of the material surface will break,the crosslinking area of the polymer will be hydrolysis,and a new material SiO2 will be generated.The increase of compression load and aging time will aggravate the damage of silicone rubber gasket material.

关 键 词：PEMFC 垫片材料 压缩载荷 化学损伤 

分 类 号：TM911[电气工程—电力电子与电力传动]