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Bioinspired Dynamic Cross-Linking Hydrogel Sensors with Skin-like Strain and Pressure Sensing Behaviors
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-11-13 , DOI: 10.1021/acs.chemmater.9b03919
Shan Xia 1 , Qian Zhang 1 , Shixin Song 1 , Lijie Duan 1 , Guanghui Gao 1
Affiliation  

Biomimetic skin-like electric materials have been rapidly developed for human–machine interfaces, health monitoring, and soft robots. However, achieving a combination of mechanical and sensory properties like those of human skin remains a challenge. Here, a bioinspired physical cross-linking hydrogel sensor is designed and fabricated on the basis of an ionic conductive hydrogel with hybrid latex particles in a physically cross-linked network. The hydrogels exhibit excellent mechanical adaptability similar to that of human skin, including a low modulus, excellent stretchability, robust elasticity, rapid self-recoverability, and a good antifatigue property. Moreover, the addition of LiCl gives the hydrogel ideal ionic conducive behavior as a high-performance wearable sensor. The hydrogel-based sensor exhibits high sensitivity (GF = 5.44) over a broad strain window (0.25–2000%), excellent pressure sensing capability, a rapid response time, negligible hysteresis, and good durability. As a result, the hydrogel sensor can monitor various human motions, including large-scale joint bending, running and jumping, and tiny phonating and breathing. Therefore, the strategy will broaden the path for the new generation of biomimetic sensors with skin-like mechanical and strain and pressure sensing performances.

中文翻译:

具有皮肤应变和压力感应行为的生物启发型动态交联水凝胶传感器

仿生皮肤状的电子材料已迅速开发用于人机界面,健康监测和软机器人。然而,实现诸如人类皮肤的机械和感官特性的组合仍然是挑战。在此,基于具有物理交联网络中的杂化乳胶颗粒的离子导电水凝胶,设计并制造了具有生物启发性的物理交联水凝胶传感器。水凝胶显示出与人类皮肤相似的优异的机械适应性,包括低模量,优异的可拉伸性,强大的弹性,快速的自恢复性和良好的抗疲劳性能。此外,LiCl的添加使水凝胶作为高性能可穿戴传感器具有理想的离子导电性能。基于水凝胶的传感器具有很高的灵敏度(GF = 5)。44)在宽的应变窗口(0.25–2000%)范围内,具有出色的压力感应能力,快速的响应时间,可忽略的滞后性和良好的耐久性。结果,水凝胶传感器可以监视各种人体运动,包括大规模的关节弯曲,奔跑和跳跃,以及微小的发声和呼吸。因此,该策略将拓宽具有皮肤般的机械,应变和压力感测性能的新一代仿生传感器的路径。
更新日期:2019-11-14
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