An ideal hydrogel with excellent adhesive performance has drawn much attention in research and applications. In this paper, a photo‐crosslinked polyvinyl alcohol bearing styrylpyridinium group/cellulose nanocrystals (PVA‐SbQ/CNC) composite hydrogel is designed through photo‐crosslinking technology for preventing the physical crosslinking of polyvinyl alcohol to maintain enough hydroxy groups in the hydrogel. Thus, the hydrogel exhibits excellent adhesive behavior not only for various solid substrates (plastics, rubbers, glasses, metals, and woods) but also muscle and fat. In addition, the formation mechanism, the swelling behavior, and mechanical strength are also investigated. Also, these results show that photo‐crosslinked PVA‐SbQ/CNC hydrogel possesses high swelling rate, super stretchability, and high toughness. Moreover, adhesive, mechanical, and swelling properties of PVA‐SbQ/CNC hydrogels can be changed with the increase of total incident light intensity. It is anticipated that the photo‐crosslinked PVA‐SbQ/CNC hydrogel would play a significant role in the applications of wound dressing, medical electrodes, tissue adhesives, portable equipment, and super absorbent materials. In this sense, the simple photo‐crosslinking strategy would provide new ideas for designing soft and adhesive materials through controlling the balance of cohesion and adhesion.

中文翻译：

---

光交联策略通过控制内聚力和附着力的平衡，构建出具有粘性，超强吸收性和坚韧的基于PVA的水凝胶

具有优异粘合性能的理想水凝胶在研究和应用中引起了很多关注。本文通过光交联技术设计了带有苯乙烯吡啶鎓基团/纤维素纳米晶体（PVA-SbQ / CNC）的光交联聚乙烯醇，以防止聚乙烯醇物理交联以保持水凝胶中足够的羟基。因此，水凝胶不仅对各种固体基质（塑料，橡胶，玻璃，金属和木材）都表现出优异的粘合性能，而且对肌肉和脂肪也表现出优异的粘合性能。此外，还研究了形成机理，溶胀行为和机械强度。此外，这些结果表明，光交联的PVA-SbQ / CNC水凝胶具有高溶胀率，超强拉伸性和高韧性。此外，胶粘剂，机械，随着总入射光强度的增加，PVA-SbQ / CNC水凝胶的溶胀特性会发生变化。预计光交联的PVA-SbQ / CNC水凝胶将在伤口敷料，医用电极，组织粘合剂，便携式设备和超吸收性材料的应用中发挥重要作用。从这个意义上讲，简单的光交联策略将通过控制内聚力和粘附力的平衡，为设计柔软和粘附性材料提供新的思路。