Tough Adhesion of Hydrogels

Abstract eng:
Tough adhesion for synthetic hydrogels is challenging and only achieved very recently by chemically anchoring long-chain polymer networks of tough hydrogels on solid surfaces. Here we provide a quantitative understanding of the mechanism for the tough adhesion of hydrogels on solid materials by using a coupled cohesive-zone and Mullins-effect model. Numerical simulations reveal the toughening mechanism of the energy dissipation and the importance of the high intrinsic work of adhesion as well as the interfacial strength. These findings shed light on the reported strong bonding of tough hydrogels that the chemical anchoring gives high interfacial strength and large intrinsic work of adhesion to trigger significant energy dissipation and further enhance the interfacial toughness.

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