Ultrastretchable, self-adhesive, strain-sensitive and self-healing GO@DA/Alginate/P(AAc-co-AAm) multifunctional hydrogels via mussel-inspired chemistry. (15th February 2021)

• Record Type: Journal Article
• Authors: Jin, Xiaoqiang; Jiang, Huihong; Zhang, Zhiming; Yao, Yuejun; Bao, Xiaojiong; Hu, Qiaoling
• Is Part Of: Carbohydrate polymers. Volume 254(2021)
• Publication Date: 2021-02-15
• Subjects: Polysaccharides -- Dopamine -- Nanocomposite -- Double network -- Multifunctional hydrogels; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.117316
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: GO@DA nanofillers were prepared via GO confined DA polymerization. Hydrogel was fabricated via one-pot in-situ copolymerization. Hydrogel had nanocomposite and double-network composite structures. Properties of hydrogels were optimized by adjusting the content of DA and alginate. Multifunctionality made hydrogel a practical candidate for biosensors. Abstract: For conductive hydrogels applied in biosensors, wearable devices and so forth, multifunctionality is an inevitable trend of development to meet various practical requirements and enhance human experience. Herein, inspired by nanocomposite, double-network (DN) and mussel chemistry, a new Graphene oxide@Dopamine/Alginate/Poly(acrylic acid- co -acrylamide) [GO@DA/Alginate/P(AAc- co -AAm)] hydrogel was fabricated through one-pot in-situ radical copolymerization. GO@DA nanofillers, prepared via GO confined DA polymerization, imparted the hydrogel with remarkable adhesiveness. Alginate/P(AAc- co -AAm) DN matrix, physically and chemically crosslinked by Fe 3+ and N, N'-Methylenebisacrylamide, made hydrogels ultrastretchable, self-healing and biocompatible. With contents of DA and alginate accurately regulated, the tensile strength, elongation, adhesion strength and conductivity of the optimal hydrogel could reach 320.2 kPa, 1198 %, 36.9 kPa and 3.24 ± 0.12 S/m, respectively. What's more notable was that the synergistic integration of repeatable adhesiveness, strain sensitivity, use stability, self-healing ability and biocompatibility provided such hydrogels with tremendous possibility of practical application for strain sensors.