Robust Electrostatically Interactive Hydrogel Coatings for Macroscopic Supramolecular Assembly via Rapid Wet Adhesion

• DOI: 10.1021/acsami.3c02176
• Publication Date: 2023-04-19T14:25:46Z
• Authors: Yijing Liu; Rongzhuang Zhao; Shaohua Li; Xianchong Xue; Qian Zhang; Feng Shi; Mengjiao Cheng
• Keywords: Micrometer

A macroscopic supramolecular assembly (MSA) refers to non-covalent interactions between building blocks over a micrometer scale, which provides insights into bio-/wet adhesion, self-healing, and so on new fabrication strategies heterogeneous structures bio-scaffolds. The key realize the MSA of rigid materials is pre-modifying compliant coating known as "flexible spacing coating" beneath interactive moieties. However, available coatings are limited polyelectrolyte multilayers with shortcomings tedious fabrication, weak adhesion substrates, susceptibility external reagents, on. Here, we develop facile method induce poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogel electrostatic achieve diverse (quartz, metal, rubber, plastics). Selective self-assembly positive-negative charged surfaces observed by naked eye under 3 min shaking in water, providing rapid wet adhesion. interfacial binding force interacted 1018.1 ± 299.2 N/m2, two magnitudes larger than that control groups, is, positive-positive (24.4 10.0 N/m2) negative-negative (67.5 16.7 surfaces. In situ measurements experiments identically have strongly supported improved strength chemical selectivity blocks. advantageous simple strong materials, robust solvent tolerance solutions, feasibility photo-patterning. We envision above strategy would broaden material choices flexible for efficient methods