期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 31, 页码 36166-36177出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c10202
关键词
hydrogen-bond-based hydrogel; solvent exchange; tough wet adhesion; Zn2+-ion-mediated on-demand debonding; efficient hemostasis
资金
- Major Project of WIUCAS [WIUCASQD2021004, WIU-CASQD2021035]
- National Natural Science Foundation of China [21504022]
- China Postdoctoral Science Foundation [2018M642745, 2020M672179]
- Science and Technology Project of Henan Province [212102210201, 212102310015]
- Department of Education in Henan Province [21A430017, 2020GGJS052]
- Excellent Youth Fund Project of Henan Natural Science Foundation
In this study, a hydrogen-bond-based hydrogel with tough wet adhesion was developed. The adhesion of the hydrogel can be adjusted by Zn2+ ions. The hydrogel exhibits strong adhesion to both wet and dry tissues and maintains stable adhesion in underwater and various wet environments. Additionally, the hydrogel shows efficient hemostasis in mouse models.
Hydrogels have been widely used in wet tissues. However, the insufficient adhesion of hydrogels for wound hemostasis remains a grand challenge. Herein, a facile yet effective strategy is developed to fabricate tough wet adhesion of hydrogen-bond-based hydrogel (PAAcVI hydrogel) using copolymerization of acrylic acid and 1-vinylimidazole in dimethyl sulfoxide followed by solvent exchange with water. The PAAcVI hydrogel shows equally robust adhesion (> 400 J m(-2)) to both wet and dry tissues. Moreover, the PAAcVI hydrogel also exhibits strong long-term stable adhesion underwater and in various wet environments. Meanwhile, the adhesion of PAAcVI hydrogel can be adjusted through Zn2+-ion-mediated on-demand debonding, which makes it easy to peel off from the tissue reducing pain during dressing removal and avoiding secondary injury. The PAAcVI hydrogel displays efficient hemostasis in the mice-tail docking model and mice-liver bleeding model. This hydrogen-bond-based hydrogel shows tough wet adhesion, and its adhesion is controllable, demonstrating its promising application in moisture-resistant adhesives, medical adhesives, and hemostatic materials.
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