期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 191, 期 -, 页码 627-636出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.09.051
关键词
Janus; Self-healing hydrogels; Wearable sensors
Functionalized Janus graphene oxide nanosheets were successfully fabricated using Pickering emulsion template, and applied for the synthesis of self-healing nanocomposite hydrogels. The hydrogels exhibited excellent self-healing efficiency and mechanical properties, mainly supported by the collaborative effect of multiple interactions, showing great application prospects in wearable flexible sensors.
Wearable strain sensors have received widespread attention in research fields due to their applications in human motion detection. In this manuscript, the fabrication of functionalized Janus graphene oxide (GO) nanosheets were used by Pickering emulsion template. Polypyrrole (PPy) and poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were asymmetrically grafted on the two sides of GO (GO@PPy/PDMAEMA Janus NS), which successfully applied to synthesize Janus NS/guar gum-poly(acrylic acid) (GG-PAA) self-healing nanocomposite hydrogels. The outstandingly improved self-healing efficiency (92.8% for 2 h) and mechanical properties (strength of 4.12 MPa and toughness of 873.8%) of nanocomposite hydrogels were mainly supported by the collaborative effect of reversible electrostatic interactions, multiple hydrogen bonds and metal-ligand coordination. Moreover, the hydrogels exhibited strain sensitivity and could be able to monitor a variety of human motions, which have outstanding application prospects in wearable flexible sensors.
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