中文摘要：

针对常规对称电极的离子聚合物-金属复合材料（IPMC)在交流信号的作用下仅能够产生往复摆动这种单一运动形式对其开发利用的限制，通过在传统IPMC铂电极表面的一侧镀铜制备出非对称电极IPMC,实现了IPMC的单向弯曲。利用扫描电镜对样品铂电极层表面镀铜的厚度观察，结果显示在IPMC电极一侧分别电镀1.01pm、2.59pm、3.80pm铜层；通过激光位移传感器对样品末端的位移进行测试，结果表明，在正弦电压信号的激励下，非对称电极的IPMC有单向弯曲的趋势，当镀铜层厚度达到3.80pm,即铜层厚度与铂层厚度之比达到2.06时,IPMC正向最大位移与负向最大位移相差5倍，单向弯曲的趋势明显，且倾向于向更厚的铂铜复合镀层方向弯曲。

英文摘要：

Conventional Ionic Polymer-Metal Composites(IPMC)with symmetrical electrodes can produce reciprocating swing under the excitation of AC signal,but this single mode of motion limits its further development and utilization.To realize IPMC unidirectional bending,the asymmetrical e-lectrodes of IPMC was prepared by plating copper on one side of the Pt electrode,and the effects of asymmetrical electrodes on IPMC bending performance were investigated.The SEM results showed that the1.01pm,2.59pm and3.80pm copper layers were electroplated on the surface of one side of the Pt electrode.The tip displacement measurement results showed that,under the excitation of the sinusoidal voltage signal,the IPMC with asymmetrical electrodes produced unidirectional ben-ding,and when the copper layer reached3.80pm,where the ratio of the thickness of the copper layer to the thickness of the platinum layer was2.06,the maximum displacement of positive direc-tion was about five times that of the negative direction and the trend of unidirectional bending of the IPMC was obvious and tended to bend to the direction of the Pt-Cu electrode.