Functional hydrogel coatings
Functional hydrogel coatings
Junjie Liu1,2,3, Shaoxing Qu1,2, Zhigang Suo4 and Wei Yang1,
National Science Review
8: nwaa254, 2021
doi: 10.1093/nsr/nwaa254
Advance access publication 5 October 2020
More recently, functional hydrogel coatings with controlled thickness and tough adhesion have been achieved on various
substrates.
Hydrogel-coated substrates combine the advantages of hydrogels, such as lubricity, biocompatibility and anti-biofouling properties, with the advantages of substrates, such as stiffness, toughness and strength. In this review, we focus on three aspects of functional hydrogel coatings:
(i) applications and functions enabled by hydrogel coatings,
(ii) methods of coating various substrates with different functional hydrogels with tough adhesion, and
(iii) tests to evaluate the adhesion between functional hydrogel coatings and substrates.
A recent theory indicates that both the energy dissipated during loading and the release of the stored elastic energy corresponding to crack propagation contribute to the toughness as well as the adhesion of the hydrogel coating.
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