Thermosensitive hydrogel-based, high performance flexible sensors for multi-functional e-skins

Lu，Dongdong1,2; Zhu，Mingning3; Li，Xiaoyuan4; Zhu，Zilong1; Lin，Xin1; Guo，Chuan Fei1; Xiang，Xiaodong1,3

2023-07-25

10.1039/d3ta02948d

Journal of Materials Chemistry A   Impact Factor & Quartile

2050-7488

2050-7496

Electronic skins (e-skins) have shown great potential in “bionic-machine” technologies. The development of bio-compatible e-skins that mimic the functions of the human skin, which is sensitive to multiple external stimuli, remains a challenge and a highly pursued goal. In this work, we report the synthesis, characterization, and performance-optimization of a thermo-sensitive and conductive hydrogel that displays multimodal sensing capacity. The optimal composition of a hydrogel with a volume phase transition temperature (VPTT) of 38 °C and a transition width of 15 °C was developed. This gel has an elastic modulus similar to that of the human skin, a large stretchability of 1900%, and a high gauge factor of 9.8. The gel is also puncture-resistant, self-healable, and self-adhesive. The as-fabricated hydrogel can sense multimodal stimuli, including force and temperature, with high sensitivity. We demonstrate that the gel possesses important attributes as a candidate for e-skin to monitor physiological signals including temperature, bending, and pressure in real time.

SCI

English

First ; Corresponding

Shenzhen Fundamental Research funding[JCYJ20220530113802006] ; Department of Science, Guangdong Natural Science Foundation[2023A1515012680] ; Technology of Guangdong Province[2017ZT07Z479]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:001043383500001

ROYAL SOC CHEMISTRY

2-s2.0-85168837429

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518000,China
2.School of Physical Sciences,Great Bay University,Dongguan,523000,China
3.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
4.Department of Chemistry,The Hong Kong University of Science and Technology,Kowloon,Clearwater Bay,Hong Kong

Lu，Dongdong,Zhu，Mingning,Li，Xiaoyuan,et al. Thermosensitive hydrogel-based, high performance flexible sensors for multi-functional e-skins[J]. Journal of Materials Chemistry A,2023,11(34):18247-18261.

Lu，Dongdong.,Zhu，Mingning.,Li，Xiaoyuan.,Zhu，Zilong.,Lin，Xin.,...&Xiang，Xiaodong.(2023).Thermosensitive hydrogel-based, high performance flexible sensors for multi-functional e-skins.Journal of Materials Chemistry A,11(34),18247-18261.

Lu，Dongdong,et al."Thermosensitive hydrogel-based, high performance flexible sensors for multi-functional e-skins".Journal of Materials Chemistry A 11.34(2023):18247-18261.