Connective tissue inspired elastomer-based hydrogel for artificial skin via radiation-indued penetrating polymerization

Yuan Tian, Zhihao Wang, Shuiyan Cao, Dong Liu, Yukun Zhang, Chong Chen, Zhiwen Jiang, Jun Ma () and Yunlong Wang ()
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Yuan Tian: Nanjing University of Aeronautics and Astronautics
Zhihao Wang: Nanjing University of Aeronautics and Astronautics
Shuiyan Cao: Nanjing University of Aeronautics and Astronautics
Dong Liu: China Academy of Engineering Physics
Yukun Zhang: Nanjing University of Aeronautics and Astronautics
Chong Chen: Nanjing University of Aeronautics and Astronautics
Zhiwen Jiang: Nanjing University of Aeronautics and Astronautics
Jun Ma: Nanjing University of Aeronautics and Astronautics
Yunlong Wang: Nanjing University of Aeronautics and Astronautics

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Robust hydrogels offer a candidate for artificial skin of bionic robots, yet few hydrogels have a comprehensive performance comparable to real human skin. Here, we present a general method to convert traditional elastomers into tough hydrogels via a unique radiation-induced penetrating polymerization method. The hydrogel is composed of the original hydrophobic crosslinking network from elastomers and grafted hydrophilic chains, which act as elastic collagen fibers and water-rich substances. Therefore, it successfully combines the advantages of both elastomers and hydrogels and provides similar Young’s modulus and friction coefficients to human skin, as well as better compression and puncture load capacities than double network and polyampholyte hydrogels. Additionally, responsive abilities can be introduced during the preparation process, granting the hybrid hydrogels shape adaptability. With these unique properties, the hybrid hydrogel can be a candidate for artificial skin, fluid flow controller, wound dressing layer and many other bionic application scenarios.

Date: 2024
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DOI: 10.1038/s41467-024-44949-1

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