Multifunctional hydrogel with self-healing and recyclability based on self-catalytic Fe3+/TA system for sustainable E-skin application
Hydrogel-based materials for e-skin applications have aroused tremendous attention due to their ability to simulate human skin's sensory capabilities and possess mechanical properties comparable to those of skin. When used as sensors attached to the skin, hydrogels are inevitably subject to dam...
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| Published in | Talanta (Oxford) Vol. 296; p. 128531 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
01.01.2026
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| Subjects | |
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| Abstract | Hydrogel-based materials for e-skin applications have aroused tremendous attention due to their ability to simulate human skin's sensory capabilities and possess mechanical properties comparable to those of skin. When used as sensors attached to the skin, hydrogels are inevitably subject to damage, highlighting the need for self-healing properties. Furthermore, the lack of recyclability in traditional hydrogel sensors is detrimental to sustainability. To address this issue, we developed a hydrogel based on multiple noncovalent bonds and ferric ion/tannic acid redox system, combined with polyvinyl alcohol as a reinforcing skeleton and low polymerization of polyacrylic acid. This design endows the hydrogel with excellent self-healing properties, easy recyclability and enhanced mechanical properties. Additionally, as a strain sensor, it exhibits competitive performance including high sensitivity, rapid response time and excellent sensing stability. With these remarkable characteristics, the hydrogel demonstrates significant potential as a sensor for sustainable e-skin applications.
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•Hydrogel incorporated superior reversibility while maintain excellent mechanical properties.•Hydrogel possesses both self-healing ability and recyclability while this match is rare.•Hydrogel achieves a fast and excellent healing without external assistance.•Easy and low-cost way of recycling process compare to conventional recyclable way.•High gauge factor of hydrogel as strain sensor. |
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| AbstractList | Hydrogel-based materials for e-skin applications have aroused tremendous attention due to their ability to simulate human skin's sensory capabilities and possess mechanical properties comparable to those of skin. When used as sensors attached to the skin, hydrogels are inevitably subject to damage, highlighting the need for self-healing properties. Furthermore, the lack of recyclability in traditional hydrogel sensors is detrimental to sustainability. To address this issue, we developed a hydrogel based on multiple noncovalent bonds and ferric ion/tannic acid redox system, combined with polyvinyl alcohol as a reinforcing skeleton and low polymerization of polyacrylic acid. This design endows the hydrogel with excellent self-healing properties, easy recyclability and enhanced mechanical properties. Additionally, as a strain sensor, it exhibits competitive performance including high sensitivity, rapid response time and excellent sensing stability. With these remarkable characteristics, the hydrogel demonstrates significant potential as a sensor for sustainable e-skin applications.
[Display omitted]
•Hydrogel incorporated superior reversibility while maintain excellent mechanical properties.•Hydrogel possesses both self-healing ability and recyclability while this match is rare.•Hydrogel achieves a fast and excellent healing without external assistance.•Easy and low-cost way of recycling process compare to conventional recyclable way.•High gauge factor of hydrogel as strain sensor. Hydrogel-based materials for e-skin applications have aroused tremendous attention due to their ability to simulate human skin's sensory capabilities and possess mechanical properties comparable to those of skin. When used as sensors attached to the skin, hydrogels are inevitably subject to damage, highlighting the need for self-healing properties. Furthermore, the lack of recyclability in traditional hydrogel sensors is detrimental to sustainability. To address this issue, we developed a hydrogel based on multiple noncovalent bonds and ferric ion/tannic acid redox system, combined with polyvinyl alcohol as a reinforcing skeleton and low polymerization of polyacrylic acid. This design endows the hydrogel with excellent self-healing properties, easy recyclability and enhanced mechanical properties. Additionally, as a strain sensor, it exhibits competitive performance including high sensitivity, rapid response time and excellent sensing stability. With these remarkable characteristics, the hydrogel demonstrates significant potential as a sensor for sustainable e-skin applications.Hydrogel-based materials for e-skin applications have aroused tremendous attention due to their ability to simulate human skin's sensory capabilities and possess mechanical properties comparable to those of skin. When used as sensors attached to the skin, hydrogels are inevitably subject to damage, highlighting the need for self-healing properties. Furthermore, the lack of recyclability in traditional hydrogel sensors is detrimental to sustainability. To address this issue, we developed a hydrogel based on multiple noncovalent bonds and ferric ion/tannic acid redox system, combined with polyvinyl alcohol as a reinforcing skeleton and low polymerization of polyacrylic acid. This design endows the hydrogel with excellent self-healing properties, easy recyclability and enhanced mechanical properties. Additionally, as a strain sensor, it exhibits competitive performance including high sensitivity, rapid response time and excellent sensing stability. With these remarkable characteristics, the hydrogel demonstrates significant potential as a sensor for sustainable e-skin applications. |
| ArticleNumber | 128531 |
| Author | Liang, Shangqing Yao, Baidong Yang, Guoqing Wang, Chenhao Lin, Jun Xin, Qing |
| Author_xml | – sequence: 1 givenname: Chenhao surname: Wang fullname: Wang, Chenhao – sequence: 2 givenname: Qing orcidid: 0000-0003-4548-3555 surname: Xin fullname: Xin, Qing email: xinqing@hdu.edu.cn – sequence: 3 givenname: Shangqing surname: Liang fullname: Liang, Shangqing – sequence: 4 givenname: Jun surname: Lin fullname: Lin, Jun – sequence: 5 givenname: Baidong surname: Yao fullname: Yao, Baidong email: yao1984@mail.ustc.edu.cn – sequence: 6 givenname: Guoqing surname: Yang fullname: Yang, Guoqing |
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| Keywords | Self-healing Conductive hydrogel Recyclability Strain sensor Diverse functions |
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