An Antifreezing/Antiheating Hydrogel Containing Catechol Derivative Urushiol for Strong Wet Adhesion to Various Substrates.

ACS Applied Materials & Interfaces
Xianmou FanHaiqing Liu

Abstract

Tough adhesive hydrogels that can tightly bond to wet tissue/polymer/ceramic/metal surfaces have great potentials in various fields. However, conventional adhesive hydrogels usually show short-term and nonreversible adhesion ability, as the water component in a hydrogel readily transforms to vapor or ice in response to fluctuation of environment temperature, hindering their applications in extreme conditions such as in freezing Arctic and roasting Africa. For the first time, urushiol (UH), a natural catechol derivative with a long alkyl side chain, is used as a starting material to copolymerize with acrylamide for fabricating adhesive hydrogels, which contain hydrophobic/hydrophilic moieties, antifreezing agent, and adhesive catechol groups. The antifreezer/moisturizer glycerol/water binary solvent dispersed in the hydrogel endows it with antifreezing/antiheating property. The hydrophobic association and π-π interaction from UH moieties of the copolymer greatly improve its mechanical strength (tensile stress: ∼0.12 MPa with strain of ∼1100%, toughness: ∼72 kJ/m3, compression stress: ∼6.72 MPa at strain of 90%). The hydrogel can strongly adhere to various dry/wet biological/polymeric/ceramic/metallic substrates at temperatures r...Continue Reading

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Citations

Mar 5, 2021·Advanced Materials·Xi LiuShutao Wang
Sep 18, 2021·Advanced Materials·Hailong Fan, Jian Ping Gong
Oct 26, 2021·ACS Applied Materials & Interfaces·Qinglin LiQinhui Chen
Dec 14, 2021·ACS Applied Materials & Interfaces·Yajun ChenQufu Wei
Jan 26, 2022·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Lin LiHong Li

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