Compliant Iontronic Triboelectric Gels with Phase-Locked Structure Enabled by Competitive Hydrogen Bonding

doi:10.1007/s40820-024-01387-4

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	Guoli Du
	Yuzheng Shao
	Bin Luo
	Tao Liu
	Jiamin Zhao
	Ying Qin
	Jinlong Wang
	Song Zhang
	Mingchao Chi
	Cong Gao
	Yanhua Liu
	Chenchen Cai
	Shuangfei Wang
	Shuangxi Nie

Abstract：

Rapid advancements in flexible electronics technology propel soft tactile sensing devices toward high-level biointegration, even attaining tactile perception capabilities surpassing human skin. However, the inherent mechanical mismatch resulting from deficient biomimetic mechanical properties of sensing materials poses a challenge to the application of wearable tactile sensing devices in human-machine interaction. Inspired by the innate biphasic structure of human subcutaneous tissue, this study discloses a skin-compliant wearable iontronic triboelectric gel via phase separation induced by competitive hydrogen bonding. Solvent-nonsolvent interactions are used to construct competitive hydrogen bonding systems to trigger phase separation, and the resulting soft-hard alternating phase-locked structure confers the iontronic triboelectric gel with Young's modulus (6.8-281.9 kPa) and high tensile properties (880%) compatible with human skin. The abundance of reactive hydroxyl groups gives the gel excellent tribopositive and self-adhesive properties (peel strength > 70 N m⁻¹). The self-powered tactile sensing skin based on this gel maintains favorable interface and mechanical stability with the working object, which greatly ensures the high fidelity and reliability of soft tactile sensing signals. This strategy, enabling skin-compliant design and broad dynamic tunability of the mechanical properties of sensing materials, presents a universal platform for broad applications from soft robots to wearable electronics.

Key words： Triboelectric nanogenerator Cellulose Triboelectric gel Self-powered sensor Energy harvesting

收稿日期: 2024-01-20 出版日期: 2024-04-09

通讯作者: Shuangxi Nie

引用本文:

Guoli Du, Yuzheng Shao, Bin Luo, Tao Liu, Jiamin Zhao, Ying Qin, Jinlong Wang, Song Zhang, Mingchao Chi, Cong Gao, Yanhua Liu, Chenchen Cai, Shuangfei Wang, Shuangxi Nie. [J]. Nano-Micro Letters, 2024, 16(1): 170-.
Guoli Du, Yuzheng Shao, Bin Luo, Tao Liu, Jiamin Zhao, Ying Qin, Jinlong Wang, Song Zhang, Mingchao Chi, Cong Gao, Yanhua Liu, Chenchen Cai, Shuangfei Wang, Shuangxi Nie. Compliant Iontronic Triboelectric Gels with Phase-Locked Structure Enabled by Competitive Hydrogen Bonding. Nano-Micro Letters, 2024, 16(1): 170-.

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https://www.qk.sjtu.edu.cn/nml/CN/10.1007/s40820-024-01387-4 或 https://www.qk.sjtu.edu.cn/nml/CN/Y2024/V16/I1/170

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