温度—应力耦合下质子交换膜拉伸蠕变行为及本构描述  

Tensile Creep Behaviors and Intrinsic Descriptions of Proton Exchange Membranes under the Temperature-Stress Coupling

作　　者：季辉 魏刚 李永哲 张尊彪 吴爽 高秀秀 王丽 王振华 张永明 JI Hui;WEI Gang;LI Yongzhe;ZHANG Zunbiao;WU Shuang;GAO Xiuxiu;WANG Li;WANG Zhenhua;ZHANG Yongming(Shandong Dongyue Future Hydrogen Energy Material Co.,Ltd.,Huantai 256400,China)

机构地区：[1]山东东岳未来氢能材料股份有限公司,山东桓台256400

出　　处：《塑料工业》2024年第10期144-149,共6页China Plastics Industry

基　　金：国家重点研发计划项目(2021YFB4001102)。

摘　　要：质子交换膜作为质子交换膜电池核心部件,其蠕变性能对质子交换膜电池的结构设计至关重要。通过研究质子交换膜在不同温度、应力下的拉伸蠕变性能,探究应力、温度对质子交换膜短期蠕变行为的耦合影响规律。分别采用Burgers模型和Findley幂律模型对质子交换膜短期蠕变行为进行拟合,分析了Burgers模型和Findley幂律模型的相关系数及变化规律。结果表明,在不同的温度、应力水平下,质子交换膜蠕变曲线均包含瞬态蠕变阶段和稳态蠕变阶段,瞬间弹性形变、延迟弹性形变和黏性流动形变均表现出对温度、应力的依赖性;Burgers模型和Findley幂律模型都能很好地模拟质子交换膜的蠕变性能。最后,通过稳态蠕变速率与温度、应力水平的量化关系获得了应力指数和蠕变激活能,分析了质子交换膜的蠕变行为与机理。As the core component of the proton exchange membrane cell,its creep behaviors are crucial to the structure designs of the proton exchange membrane cell.The coupled influence laws of stress and temperature on the short-term creep behaviors of proton exchange membranes were investigated by studying the tensile creep properties of proton exchange membranes at different temperatures and stresses.The Burgers model and Findley power law model were used to fit the short-term creep behavior of proton exchange membranes,and the correlation coefficients and variation rules of the Burgers model and Findley power law model were analyzed.The results show that the creep curves of the proton exchange membranes contain transient creep stage and steady state creep stage at different temperatures and stress levels.Instantaneous elastic deformation,delayed elastic deformation and viscous flow deformation all show the dependences on temperature and stress.Burgers model and Findley power law model could well simulate the creep behaviors of the proton exchange membranes.Finally,the stress index and creep activation energy were obtained through the quantitative relationships between the steady-state creep rate,temperature and stress level.The creep behaviors and mechanisms of proton exchange membranes were also analyzed.

关 键 词：质子交换膜 蠕变行为 变形机制 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]