PEMFC环境和压缩载荷下垫片材料的机械性能损伤

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英文篇名：Degradation of mechanical properties of gasket material in simulated PEMFC environments under compressive load 作者：冯秋月 ; 殷金鹏 ; 谈金祝 ; 潘清 ; 王志强 英文作者：FENG Qiu-yue;YIN Jin-peng;TAN Jin-zhu;PAN Qing;WANG Zhi-qiang;College of Mechanical and Power Engineering, Nanjing Tech University; 关键词：质子交换膜燃料电池 ; 环境 ; 压缩载荷 ; 硅橡胶 ; 机械性能 英文关键词：PEMFC;;environment;;compressive load;;silicone rubber;;mechanical properties 中文刊名：DYJS 英文刊名：Chinese Journal of Power Sources 机构：南京工业大学机械与动力工程学院; 出版日期：2019-02-20 出版单位：电源技术 年：2019 期：v.43;No.341 基金：国家自然科学基金(51175241) 语种：中文; 页：DYJS201902023 页数：4 CN：02 ISSN：12-1126/TM 分类号：80-82+190

摘要

采用实验方法研究质子交换膜燃料电池(PEMFC)垫片常用材料在模拟PEMFC环境和压缩载荷下的机械性能损伤。选用两种溶液[一种溶液为正规溶液(RS),另一种溶液为加速试验溶液(ADT)]来模拟PEMFC试验环境,一种压缩载荷来模拟试样在PEMFC环境下的受载情况。采用电子天平测量试样质量损失;采用光学显微镜观察试样表面的微观形貌变化;采用机械性能实验研究试样的机械性能变化。结果表明:试样的质量损失随着老化时间的增加而增大,在ADT溶液中质量损失比RS溶液中损失更明显;光学显微镜观察结果表明试样表面由平滑变得粗糙,直至产生裂纹,最后裂纹扩展;机械性能实验结果表明,随着老化时间的增加,试样的压缩永久变形逐渐增加,压缩应力松弛模量逐渐减少。
        The degradation of the mechanical properties of the gasket material used widely for proton exchange membrane fuel cell(PEMFC) were studied experimentally in simulated PEM fuel cell environments under compressive load. Two solutions [the regular solution(RS) and the accelerated durability test solution(ADT)] were used to simulate the PEM fuel cell test environments, and a compressive load was applied to the test sample in the simulated PEM fuel cell environments. The electronic balance was used to measure the weight loss of the sample.The optical microscopy was used to show the topographical changes on the sample surface, and the mechanical property tests were conducted to assess the change in mechanical properties of the sample. The test results reveal that the weight loss of the silicone rubber sample increases with the exposure time, and the weight loss in the ADT solution is more than that in the RS. The optical microscope indicates that the surface conditions of the samples changes from the initial smoothness to toughness, crack appearance and final crack propagation. The test results of mechanical properties show that the compression set rate of the samples gradually increases with the exposure time.The compressive stress relaxation modulus of the samples decreases gradually with the exposure time.

引文

[1] LI G,TAN J,GONG J. Chemical aging of the silicone rubber in asimulated and three accelerated proton exchange membrane fuel cellenvironments[J].Journal of Power Sources,2012,217:175-183.
    [2]李果,谈金祝,巩建鸣.酸性环境对PEM燃料电池弹性体垫片材料老化性能的影响[J].南京工业大学学报,2012,34(1):41-45.
    [3] LIN C W,CHIEN C H,TAN J Z,et al. Dynamic mechanical charac-teristics of five elastomeric gasket materials aged in a simulated andan accelerated PEM fuel cell environment[J].International Journal ofHydrogen Energy,2011,36:6756-6767.
    [4] TONG C,LIN C W,CHIEN C H,et al. Service life estimation ofliquid silicone rubber seals in polymer electrolyte membrane fuelcell environment[J].Journal of Power Sources,2011,196:1216-1221.
    [5] PEHLIVAN-DAVIS S,CLARKE J,ARMOUR S.Comparison of ac-celerated aging of silicone rubber gasket material with aging in afuel cell environment[J].Journal of Applied Polymer Science,2013,129:1446-1454.
    [6] TAN J,CHAO Y J,LI X,et al. Degradation of silicone rubber undercompression in a simulated PEM fuel cell environment[J].Journal ofPower Sources,2007,172:782-789.
    [7] CHANG H,WAN Z,CHEN X,et al. Temperature and humidity ef-fect on aging of silicone rubbers as sealing materials for proton ex-change membrane fuel cell applications[J].Applied Thermal Engi-neering,2016,104:472-478.
    [8] TAN J,CHAO Y,ZEE J W,et al. Assessment of mechanical proper-ties of fluoroelastomer and EPDM in a simulated PEM fuel cell en-vironment by microindentation test[J]. Mater Sci Eng A,2008,496:464-470.