离子形状记忆聚合物凝胶作为多功能传感器。

Ionic shape memory polymer gels as multifunctional sensors.

作者信息

An YingJun, Yoshida Haruki, Jing Yuxin, Liang Tian, Okuzaki Hidenori

机构信息

Graduate Faculty of Interdisciplinary Research, University of Yamanashi, 4-4-37 Takeda, Kofu, 400-8510, Japan.

出版信息

Soft Matter. 2022 Sep 21;18(36):6791-6799. doi: 10.1039/d2sm00515h.

DOI:10.1039/d2sm00515h

PMID:36040105

Abstract

Novel ionic shape memory polymer (SMP) gels were fabricated using SMPs and ionic liquids (ILs) of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI) at different weight ratios (). The shape memory effect and sensor performance of the ionic SMP gels were investigated by means of thermomechanical and mechanoelectrical analyses. It was found that the ionic SMP gel at = 25 wt% showed a shape memory effect with the shape fixing ratio () and shape recovery ratio () of 72.7% and 72.9%, respectively. Upon bending, the ionic SMP gel sensors with PEDOT:PSS electrodes generated an open circuit voltage of 3.3 mV and a charge of 1.6 nC which linearly increased with increasing bending displacement and velocity, respectively. Furthermore, the wearable shape memory multifunctional sensor array was demonstrated as a self-powered motion sensor for IoT applications.

摘要

采用1-乙基-3-甲基咪唑双（三氟甲基磺酰）亚胺（EMI-TFSI）离子液体（ILs）与形状记忆聚合物（SMPs）以不同重量比制备了新型离子形状记忆聚合物（SMP）凝胶。通过热机械分析和机电分析研究了离子SMP凝胶的形状记忆效应和传感器性能。结果发现，重量比为25 wt%的离子SMP凝胶呈现出形状记忆效应，其形状固定率（）和形状恢复率（）分别为72.7%和72.9%。弯曲时，带有PEDOT:PSS电极的离子SMP凝胶传感器产生的开路电压为3.3 mV，电荷量为1.6 nC，分别随弯曲位移和速度的增加而线性增加。此外，可穿戴形状记忆多功能传感器阵列被证明是一种用于物联网应用的自供电运动传感器。