Biomimetic Flexible Hydrogel Electronics

doi:10.19894/j.issn.1000-0518.210514

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (1): 55-73.DOI: 10.19894/j.issn.1000-0518.210514

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Biomimetic Flexible Hydrogel Electronics

LI Sheng-Nan,FU Jun()

Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education，Guangdong Functional Biomaterials Engineering Technology Research Center，Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices. School of Materials Science and Engineering，Sun Yat-sen University，Guangzhou 510275，China

Received:2021-10-27 Accepted:2021-11-16 Published:2022-01-01 Online:2022-01-10
Contact: Jun FU
About author:E⁃mail：fujun8@mail.sysu.edu.cn
Supported by:
the National Natural Science Foundation of China(51873224)

Abstract

Abstract:

Hydrogels have tissue-like mechanical properties and excellent biocompatibility， and are widely recognized as ideal candidate materials for bioelectronics. Inspired by bio-tissues such as skin， nerves， and muscles， etc.， a lot of hydrogels with biomimetic structures and functions have been developed to mimic the capability of creatures to sense external stimuli including temperature， pressure， strain， and electric field， etc. Such biomimetic hydrogels have important applications in electronic skin， artificial muscles， and artificial nerves， etc. This article reviews recent progress of biomimetic flexible hydrogel electronics， including representative hydrogel flexible electronic devices， typical applications， and major challenges in this field. Some open key scientific issue and important directions are outlooked in a brief perspective section at the end.

Key words: Hydrogel, Flexible electronics, Biomimetics, Electronic skin

CLC Number:

O631

Sheng-Nan LI, Jun FU. Biomimetic Flexible Hydrogel Electronics[J]. Chinese Journal of Applied Chemistry, 2022, 39(1): 55-73.

Figures/Tables 13

Fig.1 Major strategies to prepare conductive hydrogels

Fig.2 Preparation strategy of hydrogel interpenetrating network［14］

Fig.3 Schematic diagram of the preparation process and sensing performance of PC/rGO/PVA hydrogel［46］

Fig.4 （a）Sensing performance of PANI/P（AAm-co-HEMA） hydrogel sensor［28］；（b）Sensing and self-repairing properties of PVA/PANI hydrogel［29］

Fig.5 （a） MXene （Ti3C2Tx）/PVA hydrogel capacitive sensor［55］；（b） Capacitive sensor composed of alginate/polyacrylamide hydrogel and silver nanofibers （AgNFs）［58］

Fig.6 （a） CNTs/HAPAAm hydrogel pressure sensor［62］；（b） ACC/PAA/alginate hydrogel pressure sensor［63］；（c） PVA/PANI hydrogel pressure sensor［64］

Fig.7 （a） Hydrogel sensor with pleated structure［68］；（b） Hydrogel sensor with micropillar structure［56］

Fig.8 PSGO-PEDOT-PAM adhesive hydrogel［77］

Fig.9 （a） Synthesis of tissue-adhesive zwitterionic nanocomposite hydrogels and used as strain sensor［78］；（b） PDA-clay-PSBMA adhesive hydrogel and used as an implantable sensor［81］

Fig.10 （a） TOCN/SCNT hydrogel flexible electronic skin［77］；（b） HPC/PVA hydrogel sensor［50］

Fig.11 （a） The drug-loaded conductive hydrogel used as a flexible artificial nerve［20］；（b） Stretchable，light-responsive and conductive hydrogel artificial nerve with light response［84］

Fig.12 （a） P（AAm-co-AAc） hydrogel bionic muscle reinforced by β-cyclodexnitrile cellulose nanocrystals［85］；（b） Ion-printable P （NIPAM-co-NaMAc） hydrogel actuator［86］

Fig.13 PC-gel phase change hydrogel sensor used as an artificial tactile feedback system［87］

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Biomimetic Flexible Hydrogel Electronics

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