自愈水凝胶
材料科学
裂缝闭合
偏转(物理)
断裂力学
机制(生物学)
复合材料
纳米技术
作者
Yifan Huang,Deshuai Yu,Cong Fu,Rongrong Guo,Chenxu Wu,Youhui Lin
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2022-07-05
卷期号:18 (28): 5153-5165
摘要
For conventional hydrogels, the phenomenon of crack generation and propagation caused by high-stress concentration is ubiquitous. However, this phenomenon is unfavorable in many applications, such as wearable electronics, tissue engineering, and tunable adhesion. Fortunately, many hydrogels that can suppress crack growth during deformation and maintain the original mechanical properties during deformation, called crack-resistant hydrogels, have been published. Herein, the state-of-the-art of crack-resistant hydrogels is comprehensively reviewed. Starting from the principle of designing a crack-resistant hydrogel, we first survey the relevant crack-resistant strategies. The latest crack-resistant hydrogels are then categorized according to their crack-resistant mechanisms (including energy dissipation at the molecular level, multiscale structure, crack pinning, crack deflection, and sliding of chain), and their crack-resistant processes are described in detail. Furthermore, we summarize the current challenges and make an outlook for crack-resistant hydrogels, which might lead to substantial progress in the future design and development of these high-performance materials.
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