Highly Robust and Self-Powered Electronic Skin Based on Tough Conductive Self-Healing Elastomer

自愈 弹性体 材料科学 电子皮肤 导电体 可伸缩电子设备 复合材料 自愈材料 纳米技术 软机器人 可穿戴技术 柔性电子器件 光电子学 导电的 可穿戴计算机 替代医学 病理 医学
作者
Xiaochen Xun,Yue Zhang,Xuan Zhao,Bin Zhao,Fangfang Gao,Zhuo Kang,Qingliang Liao
出处
期刊:ACS Nano [American Chemical Society]
卷期号:14 (7): 9066-9072 被引量:79
标识
DOI:10.1021/acsnano.0c04158
摘要

Self-powered electronic skin (E-skin) can be endowed with high robustness by employing self-healing materials. However, most self-powered E-skin employs two heterogeneous materials with high modulus mismatch at the interface and poor fully self-healing ability, which reduces the robustness of the whole device. Here, a conductive polyurethane elastomer (PUE) with excellent mechanical toughness and self-healing ability is prepared. Based on the self-healing insulated/conductive PUE homogeneous structure and triboelectric–electrostatic induction effect, a highly robust and self-powered E-skin (HRSE-skin) is developed. The HRSE-skin possesses stable mechanosensation capability during the 50% stretching deformation due to a low modulus mismatch in the homogeneous structure. In addition, the stretchability and mechanosensation capability of the HRSE-skin can be restored after the fracture owing to the fully self-healing ability of the homogeneous structure. Therefore, the HRSE-skin has high robustness of the whole device including stable service behaviors and excellent restorability. The developed HRSE-skin demonstrates high robustness in the detection of the force and bending angle of the prosthetic joint. This work solves the low robustness of self-powered E-skin by the preparation of conductive self-healing PUE and the construction of the homogeneous structure, which is important for the practical applications of self-powered E-skin in prosthetic limbs and advanced robotics.
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