CAJ | 학술논문

垫片材料的耐久性和稳定性对质子交换膜燃料电池(PEMFC)密封及其性能至关重要。采用实验的方法研究一种潜在的PEMFC垫片用材料—甲基乙烯基硅橡胶在两种模拟的PEMFC环境下的老化损伤情况。采用光学显微镜和傅里叶转换红外光谱(ATR-FTIR)技术研究试样在模拟的PEMFC环境下其表面形貌和其化学结构的老化损伤。实验结果表明：材料浸泡在模拟的PEMFC环境下发生老化损伤，试样质量损失随着老化时间的增加而增加；光学显微镜观察结果表明：试样表面形貌发生了显著变化，其老化损伤趋势表现为试样表面从光滑到粗糙，到产生微裂纹，再到裂纹扩展；ATR-FTIR实验结果表明，试样表面的化学结构发生了显著的变化。
점편재료적내구성화은정성대질자교환막연료전지(PEMFC)밀봉급기성능지관중요。채용실험적방법연구일충잠재적PEMFC점편용재료—갑기을희기규상효재량충모의적PEMFC배경하적노화손상정황。채용광학현미경화부리협전환홍외광보(ATR-FTIR)기술연구시양재모의적PEMFC배경하기표면형모화기화학결구적노화손상。실험결과표명：재료침포재모의적PEMFC배경하발생노화손상，시양질량손실수착노화시간적증가이증가；광학현미경관찰결과표명：시양표면형모발생료현저변화，기노화손상추세표현위시양표면종광활도조조，도산생미렬문，재도렬문확전；ATR-FTIR실험결과표명，시양표면적화학결구발생료현저적변화。
Chemical and mechanical durability and stability of gasket materials are critical to both sealing and electrochemical performance of proton exchange membrane (PEM) fuel cells. The aging degradation of the methyl vinyl silicone rubber material potential y used as the gasket material of PEM fuel cells was investigated experimental y in two simulated fuel cellenvironments. The optical microscopy and ATR-FTIR were employed to study the aging degradation of surface morphology and chemical structure of the sample in the simulated PEMFC environments. The test results reveal that the gasket material degrades by weight loss for the samples soaked to the simulated PEM fuel cellenvironments, and the weight loss increases with the aging time. The optical microscopy shows that the surface conditions of the samples changes from initial y smooth to rough, crack appearance and final y crack propagation. The ATR-FTIR results indicate that the surface chemistry remarkably changes.