Affiliation:
1. School of Chemistry and Chemical Engineering South China University of Technology Guangzhou China
Abstract
AbstractThe flexible wearable hydrogel strain sensors for human motion monitoring have attracted broad attention. However, developing a high‐strength hydrogel strain sensor remains challenging and achieves synergistic characteristics such as biocompatibility, antibacterial activity, and conductivity. This work proposes a two‐step UV polymerization method for the preparation of (hydrolyzed silk fibroin (HSF)/polyacrylamide (PAM)/polyacrylic acid (PAA)/poly sulfobetaine methacrylate (PSBMA) composite hydrogels. The monomers AM and AA undergo self‐polymerization and copolymerization. Meanwhile, SF is cross‐linked with them via multiple hydrogen bonds to form the first network. After the second UV initiation, SBMA polymerizes to create the second network. The HSF8%/PAM/PAA/PSBMA2%possesses superior tensile strength (1.49 ± 0.07 MPa) and compressive modulus (21.47 ± 1.07 MPa at 99% strain). The SBMA (4 wt%) endows hydrogels with antibacterial activity (98.53% ± 4.93%). The H+ionized by PAA and the ion channels constructed by SBMA (4 wt%) provide hydrogel with ionic conductivity (0.950 S m−1). The hydrogel could be used as a flexible strain sensor to monitor human joint activity. The natural silk fibroin allows the hydrogel to retain degradability. Therefore, the SF‐based conductive hydrogel shows the potential application in flexible strain sensors.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
China Scholarship Council
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry
Cited by
2 articles.
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