Hydrogel with Robust Adhesion in Various Liquid Environments by Electrostatic‐Induced Hydrophilic and Hydrophobic Polymer Chains Migration and Rearrangement

• DOI: 10.1002/adma.202211237
• Publication Date: 2023-01-20T18:38:29Z
• Authors: Chao Fu; Luli Shen; Luqi Liu; Ping Tao; Lijing Zhu; Zhixiang Zeng; Tianhui Ren; Gang Wang

Hydrogels with wet adhesion are promising interfacial adhesive materials; however, their in water, oil, or organic solvents remains a major challenge. To address this, pressure-sensitive P(AAm-co-C18 )/PTA-Fe hydrogel is fabricated, which exhibits robust to various substrates both aqueous solutions and oil environments. It demonstrated that the key under liquid conditions removal of liquid, can be achieved through rational molecular composition regulation. By complexing hydrophilic polymer networks, phosphotungstic acid (PTA) introduced into network as physical cross-linker anchor point improve cohesion strength drive migration chains. The rearrangement hydrophobic chains on surface induced by electrostatic interactions Fe3+ , create water- oil-removing properties. co-regulating chains, able act water oils 92.6 90.0 kPa, respectively. anticipated this regulation strategy for will promote development hydrogels, have wide range applications.