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Zhou, Yang; Wan, Changjin; Yang, Yongsheng; Yang, Hui; Wang, Shancheng; Dai, Zhendong; Ji, Keju; Jiang, Hui; Chen, Xiaodong; Long, Yi
Advanced functional materials, January 4, 2019, Letnik: 29, Številka: 1Journal Article
High conductivity, large mechanical strength, and elongation are important parameters for soft electronic applications. However, it is difficult to find a material with balanced electronic and mechanical performance. Here, a simple method is developed to introduce ion‐rich pores into strong hydrogel matrix and fabricate a novel ionic conductive hydrogel with a high level of electronic and mechanical properties. The proposed ionic conductive hydrogel is achieved by physically cross‐linking the tough biocompatible polyvinyl alcohol (PVA) gel as the matrix and embedding hydroxypropyl cellulose (HPC) biopolymer fibers inside matrix followed by salt solution soaking. The wrinkle and dense structure induced by salting in PVA matrix provides large stress (1.3 MPa) and strain (975%). The well‐distributed porous structure as well as ion migration–facilitated ion‐rich environment generated by embedded HPC fibers dramatically enhances ionic conductivity (up to 3.4 S m−1, at f = 1 MHz). The conductive hybrid hydrogel can work as an artificial nerve in a 3D printed robotic hand, allowing passing of stable and tunable electrical signals and full recovery under robotic hand finger movements. This natural rubber‐like ionic conductive hydrogel has a promising application in artificial flexible electronics. A simple method to introduce ion‐rich pores into a strong hydrogel matrix and fabricate a novel ionic conductive hydrogel with a high‐level performance of both electronic and mechanical properties is developed, which has great potential for stretchable electronics and artificial tissue applications.
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in: SICRIS
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