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为了明确IPMC的失效机制,提高其使用寿命,以制备的Ag-IPMC为研究对象,对Ag-IPMC失效前、后的表面物质组分变化进行分析。采用能谱仪对选取的3处新制Ag-IPMC样件表面和5处失效Ag-IPMC样件表面进行能谱分析,分析Ag-IPMC样件失效前后其表面物质组分的变化规律,研究Ag-IPMC表面物质组分变化对运动失效的影响。结果表明:新制的Ag-IPMC样件的表面Ag镀层中几乎没有Ag的氧化物存在,并且Ag镀层的导电性能优良,为基膜内离子的交换提供稳定的电场环境;失效的Ag-IPMC样件表面Ag元素含量降低,在电流作用下镀层中的Ag与O和S发生反应,生成了氧化物和硫化物,使镀层结构产生类似于拉伸断裂的现象,从而增大了Ag-IPMC表面镀层的接触电阻,导致Ag-IPMC失效。
In order to clarify the failure mechanism of IPMC and improve its service life, the changes of surface composition of Ag-IPMC before and after Ag-IPMC were analyzed by using the prepared Ag-IPMC as the research object. The surface of three newly-formed Ag-IPMC specimens and five failed Ag-IPMC specimens were analyzed by energy dispersive spectroscopy (EDS). The variation of surface composition before and after Ag-IPMC specimen failure was analyzed. The effects of Ag Effect of Changes of Substance Components of IPC on Kinematic Failure. The results show that there is almost no Ag oxide present in the Ag coating on the surface of Ag-IPMC samples, and the Ag coating has excellent conductivity and provides a stable electric field for the exchange of ions in the base film. The failure of Ag-IPMC samples The content of Ag on the surface is reduced, the Ag in the coating reacts with O and S under the action of current to form oxides and sulfides, which will make the coating structure similar to tensile fracture and thus increase the Ag-IPMC surface Contact resistance of the coating, resulting in Ag-IPMC failure.