PVP分散剂对IPMC表面银纳米颗粒及致动性能的影响

Effect of PVP Dispersants on Silver Nanoparticles on IPMC Surface and Its Actuation Performance

采用化学还原法制备银电极离子聚合物金属复合材料(IPMC)时,由于反应过程中银颗粒团聚,导致IPMC表面电极存在银纳米颗粒分布不均匀、表面有裂缝等问题,影响了IPMC致动性能。因此,提出了在化学还原反应的过程中加入分散剂聚乙烯吡咯烷酮(PVP)来细化银纳米颗粒,使用细化的银纳米颗粒对裂缝进行填充,通过在次化学镀反应过程中加入不同质量的PVP制备了Ag-IPMC以及Ag-PVP-IPMC样品,测试了不同样品的表面形貌、表面电阻、含水量、失水速度、尖端输出力以及变形角度。结果表明,加入适量PVP时,IPMC表面电极分布均匀,裂缝减少,含水量提高,失水速度减慢,同时其尖端输出力和输出位移均有所提高。

Due to the agglomeration of silver particles in the reaction process of the preparation of silver electrode ionic polymer metal composite(IPMC) by the chemical reduction method, the distribution of silver nanoparticles on the surface electrode of IPMC was not uniform, and there were cracks on the surface of IPMC, which affected the actuation performance of IPMC. Therefore, polyvinyl pyrrolidone(PVP) dispersant was added in the process of the chemical reduction reaction to refine silver nanoparticles and the refined silver nanoparticles were used to fill the cracks. Ag-IPMC and Ag-PVP-IPMC samples were prepared by adding PVP with different masses in the reaction process of second electroless plating. Then the surface morphology, surface resistance, water content, water loss rate, tip output force and deformation angle of different samples were tested. The results show that when adding appropriate amount of PVP, the surface electrode distribution of IPMC is uniform, the crack number is reduced, the water content is increased, and the water loss rate is slowed down, meanwhile the output force and output displacement of the tip are increased.