以磺化聚酰亚胺为基材的离子聚合物金属复合材料

Preparation and Characterization of Ionic Polymer-Metal Composite Based on Sulfonated Polyimide

以磺化聚酰亚胺(SPI)作为离子聚合物金属复合材料(IPMC)的基体材料,通过化学沉积法制备新型IPMC,并对材料的性能进行了测试。扫描电子显微镜显示金属铂和银成功涂镀到SPI基材上,镀层厚度为12μm;并对以SPI和Nafion膜为基材制备的IPMC材料的含水量、表面电阻和电制动性能进行测试。实验结果显示,与传统的Nafion为基材的IPMC材料相比,以SPI为基材的新型IPMC材料的含水量明显高于Nafion基材制备的IPMC,并且电致动性能更好,产生的尖端位移远远高于Nafion基材制备的IPMC,并且灵敏度更高。这些性能显示磺化聚酰亚胺有望替代Nafion膜作为电活性聚合物的基体材料。

The ionic polymer metal composites (IPMC) based on suofonated polyimide were prepared and the performances of the new IPMC were tested. Scanning electron microscopes show that the metals platinum and silver are well adhesion with the sulfonated polyimide substrate, the thickness of the metal layer is 12 μm. The water uptake, surface resistance and electric braking performance of the IPMC materials were tested. Experimental results show that the water uptake of based on SPI is obvious higher than of based on Nafion, compared with traditional Nafion as base material of IPMC materials, the IPMC based on SPI shows a much larger tip displacement, and a stronger sensitivity. These data show that sulfonated polyimide is an ideal material to substitute Nafion membrane as the IPMC base material.