Highly Stretchable, Fast Self‐Healing, Responsive Conductive Hydrogels for Supercapacitor Electrode and Motion Sensor,Macromolecular Materials and Engineering

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Highly Stretchable, Fast Self‐Healing, Responsive Conductive Hydrogels for Supercapacitor Electrode and Motion Sensor
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-04-13 , DOI: 10.1002/mame.202000018
Duanli Wei _{1,

2} , Haonan Wang ₁ , Jiaqing Zhu ₁ , Licheng Luo ₁ , Huabo Huang ₁ , Liang Li _{1,

3} , Xianghua Yu ₁

Affiliation

Conductive hydrogels as potential soft materials have attracted tremendous attention in wearable electronic devices. Nonetheless, manufacturing intelligent materials that integrate mouldability, stretchability, responsive ability, fast self‐healing ability, as well as mechanical and electrochemical properties is still a challenge. Here, multifunctional conductive hydrogels composed of poly(vinyl alcohol) (PVA) and polypyrrole (PPy) nanotube are prepared using borax as cross‐linker. The existence of multicomplexation, entangled PVA chains, and interconnected PPy nanotubes, as well as extensive hydrogen bonding results in the fabrication of hierarchical network of PVA‐PPy hydrogels. PVA‐PPy hydrogels exhibit high stretchability (more than 1000%), multiresponsiveness, low density (0.95 g cm⁻³), high water content (96%), and 15 s self‐healing features. Furthermore, the self‐healing supercapacitor electrode and motion sensor based on PVA‐PPy hydrogels demonstrate ideal performances. This facile strategy in this work would be promising to construct an excellent multifunctional soft material for various flexible electrode and biosensor.

中文翻译：

用于超级电容器电极和运动传感器的高拉伸性，快速自修复，响应性导电水凝胶

导电水凝胶作为潜在的柔软材料已在可穿戴电子设备中引起了极大的关注。尽管如此，制造集成了可模塑性，可拉伸性，响应能力，快速自愈能力以及机械和电化学性能的智能材料仍然是一个挑战。在此，使用硼砂作为交联剂制备了由聚乙烯醇（PVA）和聚吡咯（PPy）纳米管组成的多功能导电水凝胶。多元复合物，纠缠的PVA链和相互连接的PPy纳米管以及广泛的氢键的存在导致了PVA-PPy水凝胶分层网络的制造。PVA-PPy水凝胶表现出高拉伸性（超过1000％），多响应性，低密度（0.95 g cm ^-3）），高水含量（96％）和15 s的自愈功能。此外，基于PVA-PPy水凝胶的自修复超级电容器电极和运动传感器具有理想的性能。在这项工作中这种灵活的策略将有望为各种柔性电极和生物传感器构建出色的多功能软材料。

更新日期：2020-04-13

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