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Strong and Tough PAm/SA Hydrogel with Highly Strain Sensitivity

Lingqin Zhang, Qifeng Jiang, Yiming Zhao, Jie Yuan, Xiaoying Zha, Haojiang Xie, Fankai Kong, Xingliang Xiong*

Department of Medical Information College, Chongqing Medical University, Chongqing, 400016, China

* Corresponding Author: Xingliang Xiong. Email:

(This article belongs to this Special Issue: Biomass-Derived Functional Hydrogels)

Journal of Renewable Materials 2022, 10(2), 415-430.


The hydrogel is a preferred material for flexible wearable sensors. In practical application, it should have high-efficiency mechanical toughness and self-healing performance. Besides, hydrogel requires good affinity and adhesion because of its contact with the skin. In this experiment, we made an ultra-tough hydrogel with excellent cell affinity and adhesion. We used sodium alginate (SA) and polyacrylamide (PAm) mixture as a flexible base fluid. Polydopamine reduce graphene oxide (prGO) was used as conductive nanofiller, and then PAm-prGO-SA semi-interpenetrating network hydrogel was formed through Am radical polymerization. The presence of prGO endows the hydrogels with excellent electrical conductivity. Simultaneously, some non-reduced GO forms non-covalent cross-links with PAm, SA, and Polydopamine (PDA) in the hydrogel network. The stress of PAm-prGO-SA hydrogel can reach 750 KPa, and the strain is 900%. The hydrogel, combined with its excellent electrical, mechanical properties, and biocompatibility, is expected to be applied in portable, remote, and real-time health monitoring systems.


Cite This Article

Zhang, L., Jiang, Q., Zhao, Y., Yuan, J., Zha, X. et al. (2022). Strong and Tough PAm/SA Hydrogel with Highly Strain Sensitivity. Journal of Renewable Materials, 10(2), 415–430.


This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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