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Strong Anchoring of Hydrogels through Superwetting-Assisted High-Density Interfacial Grafting |
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| Authors: | Dezhao Hao Zhao Wang Prof Mingjie Liu Prof Xinglin Guo Prof Shutao Wang Prof Lei Jiang |
| Institution: | 1. CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China
School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100190 P. R. China These authors contributed equally to this work.;2. Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191 P. R. China;3. Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China;4. CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China;5. CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100190 P. R. China |
| Abstract: | Strong adhesion of hydrogels on solids plays an important role in stable working for various practical applications. However, current hydrogel adhesion suffers from poor interfacial bonding with solid surfaces. Here, we propose a general superwetting-assisted interfacial polymerization (SAIP) strategy to robustly anchor hydrogels onto solids by forming high-density interfacial covalent bonds. The key of our strategy is to make the initiator fully contact solid surfaces via a superwetting way for enhancing the interfacial grafting efficiency. The designed anchored hydrogels show strong bulk failure with a high breaking strength of ≈1.37 MPa, different from weak interfacial failure that occurs in traditional strategies. The strong interfacial adhesion greatly enhances the stability of hydrogels against swelling destruction. This work opens up new inspirations for designing strongly anchored hydrogels from an interfacial chemistry perspective. |
| Keywords: | Grafting from Hydrogel Adhesion Interfacial Covalent Bonds Superwetting |