导电高分子水凝胶及其应变传感性能研究进展

Research Progress in Conducting Polymer Hydrogels and Their Strain Sensing Properties

导电高分子水凝胶特指以本征型导电高分子聚苯胺、聚吡咯或聚噻吩等作为导电组分的一类水凝胶。水凝胶的介质环境有助于导电高分子保持质子酸掺杂状态,导电高分子的有机骨架又易与水凝胶网络结合,因此含有导电高分子的水凝胶具有丰富的可设计性,在应变传感领域表现出可观的应用前景,是一种极具潜力的柔性电子材料。本文结合导电高分子水凝胶最新研究进展,系统归纳了亲水性高分子网络与刚性的导电高分子复合形成三维交联网络的构建策略,指出了提升该类材料力学性能、导电性能和抗冻性能的关键制备方法,并分析了其应变传感性能的影响因素。

Conducting polymer hydrogels (CPH) here refer to hydrogels contain polyaniline, polypyrrole or polythiophene as conducting components in their matrix. The water rich environment of hydrogels is beneficial for maintaining the protonic acid doped state of conducting polymers, whereas the conducting polymers with organic backbone are more appropriate to be incorporated into hydrogel matrix in compassion with other conducting fillers. Conducting polymer hydrogels thus exhibit highly tunable properties especially interesting strain sensing behaviour, and become a highly concerned material for flexible electronics at present. This review focused on the construction strategies to CPH and summarized the methods to combine the hydrophilic polymer networks with rigid conducting polymers. The key issues to improve the mechanical, conducting, and anti-freezing properties of CPH were analyzed, and the strain sensing behavior of recently reported CPH were also evaluated.