方柱状IPMC制备与驱动性能的研究

离子型聚合物金属复合物(ionic polymer-metal composites, IPMC)是一种离子型电致动聚合物材料,具有尺寸小、质量轻、驱动电压低、形变量大以及生物兼容性好等众多优点。但传统片状IPMC只能在单一方向上运动的缺点,极大地限制了IPMC的应用。因此,通过溶液浇铸和化学镀的方法制备出一种可实现多自由度运动的方柱状IPMC,并对其表面电极进行了SEM观测和驱动性能表征分析。通过对比方柱状IPMC在正弦、方波和直流电压信号下的末端位移和输出力变化情况,发现方柱状IPMC在这3种电压信号驱动下均具有较好的驱动性能,且在直流电压信号下末端位移和输出力最大。通过对方柱状IPMC在不同运动方向的测试结果进行对比分析,探究了方柱状IPMC在介入式手术导管导向装置上应用的可行性。

Fabrication and driving performance of square rod-shaped ionic polymer-metal composites

Ionic polymer-metal composite(IPMC) is an ionic electro-active polymer material, which has many advantages such as small size, light weight, low driving voltage, large deformation and good biocompatibility. However, the shortcoming of traditional sheet IPMC that can only move in a single direction greatly limits the application of IPMC. Therefore, a square rod-shaped IPMC with multi-degree-of-freedom motion was fabricated by solution casting and electroless plating, and its surface electrode was observed by SEM and its driving performance was tested. By comparing the terminal displacement and output force of square rod-shaped IPMC under sinusoidal, square-wave and DC voltage signals, it is found that square rod-shaped IPMC had better driving performance under these three voltage signals, and the terminal displacement and output force were the largest under DC voltage signals. Finally, the feasibility of the application of square-columnar IPMC in interventional catheter guiding device was explored by comparing and analyzing the test results of square rod-shaped IPMC in different directions of motion.