多壁碳纳米管改性铂型IPMC的试验研究

Experimental study on IPMC with Pt as electrodes modified by multi-walled carbon nanotubes

将一种全氟磺酸树脂(Nafion)与多壁碳纳米管(MWCNTs)分别按质量比100∶1、100∶3、100∶5进行配比,采用溶剂浇铸法配合超声波分散法制备MWCNTs/Nafion型离子交换膜(IEM),在此基础上利用化学沉积法制备铂型离子聚合物金属复合材料(Pt-IPMC),考察三种MWCNTs负载量对IEM及Pt-IPMC性能的影响。采用SEM配合EDAX研究Pt的沉积效果,对IEM及Pt-IPMC试样进行拉伸测试,采用数字信号发生器为激励源测试Pt-IPMC的动态位移。结果表明:添加MWCNTs使Pt-IPMC的内、外电极厚度分别增加200%～250%和180%～200%,使IEM及Pt-IPMC的弹性模量分别提高57.92%～140.85%和9.06%～52.85%;MWCNTs有效修饰了Pt-IPMC的内电极,并明显提升其动态位移量、动态响应及变形速度。

A kind of multi-walled carbon nanotubes（MWCNTs）/perfluorosulfonate resin（Nafion） ionic exchange membrane（IEM） was prepared with Nafion solution and MWCNTs by mass ratios of 100∶1,100∶3 and 100∶5 using solvent evaporation method and ultrasonic dispersion method.Based on the IEMs,Ionic exchange polymer metal composites with Pt as electrodes（Pt-IPMC） were manufactured by chemical deposit method.The influence of MWCNTs contents on IEM and Pt-IPMC performance was investigated.The effect of Pt deposit was measured with SEM and EDAX,mechanical properties of IEM and Pt-IPMC samples were studied by tension testing,and Pt-IPMC dynamic deformation was observed under different excitation signals.The experimental results reveal that,owing to the MWCNTs,thicknesses of inter-locked electrodes and surface electrodes are respectively increased by 200%~250% and 180%~200%,elastic moduli of IEM and Pt-IPMC are respectively increased by 57.92%~140.85% and 9.06%~52.85%,inter-locked electrodes of Pt-IPMC are effectively modified.The samples’ dynamic displacement,response and deforming velocity are enhanced.