Enhanced Strength for Double Network Hydrogel Adhesive Through Cohesion‐Adhesion Balance

Author:

Song Rijian123ORCID,Wang Xiaoyu3ORCID,Johnson Melissa3,Milne Cameron3,Lesniak‐Podsiadlo Anna4,Li Yinghao3,Lyu Jing3,Li Zishan3,Zhao Chunyu3,Yang Lizhu35,Lara‐Sáez Irene3,A Sigen36,Wang Wenxin123ORCID

Affiliation:

1. Institute of Precision Medicine Anhui University of Science and Technology Huainan 232001 China

2. Research and Clinical Translation Center of Gene Medicine and Tissue Engineering, School of Public Health Anhui University of Science and Technology Huainan 232001 China

3. Charles Institute of Dermatology School of Medicine University College Dublin Dublin 4 D04 V1W8 Ireland

4. School of Biosystems and Food Engineering Agriculture and Food Science Centre University College Dublin Dublin 4 D04 V1W8 Ireland

5. School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou 325035 China

6. School of Medicine Anhui University of Science and Technology Huainan 232001 China

Abstract

AbstractHydrogel adhesives exhibit great potential in various biomedical fields such as tissue sealing and soft robotics. However, the high‐water content and defective network structures of these hydrogel adhesives result in low intrinsic mechanical strength, severely impeding their application. In this study, it is reported that the strong hydrogel adhesive strength can be achieved when a balance is established between adhesive forces and cohesive forces. Based on this principle, a new double network (DN) design is created to combine an adhesive polyvinyl alcohol (PVA) as the first network with a flexible sodium alginate (SA) as the second network. A delicate balance is achieved between cohesion and adhesion by adjusting the ratio between the first rigid adhesive network and the second flexible network. As a result, this balanced DN hydrogel adhesive exhibits a strong tissue adhesion strength, approximately three times higher than that in the non‐balance situation.

Funder

China Scholarship Council

Science Foundation Ireland

Enterprise Ireland

Publisher

Wiley

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