共聚物
自愈
丙烯酸酯
材料科学
丙烯酸
聚合
聚合物
自愈水凝胶
甲基丙烯酸酯
化学工程
溶胶凝胶
降水
高分子化学
纳米技术
复合材料
气象学
病理
替代医学
工程类
物理
医学
作者
Yong Ye,Wenkai Wang,Xin Liu,Yong Chen,Shenghui Tian,Peng Fu
出处
期刊:Gels
[Multidisciplinary Digital Publishing Institute]
日期:2023-12-26
卷期号:10 (1): 21-21
被引量:1
摘要
Reversible chemical covalency provides a path to materials that can degrade and recombine with appropriate stimuli and which can be used for tissue regeneration and repair. However, designing and preparing efficient and quickly self-healing materials has always been a challenge. The preparation strategies of photoresponsive gels attract a lot of attention due to their precise spatial and temporal control and their predetermined response to light stimulation. In this work, the linear copolymer PAC was synthesized via precipitation polymerization of acrylic acid and 7-(2-acrylate-ethoxylated)-4-methylcoumarin. The coumarin groups on the copolymer PAC side chains provide a reversible chemical cross-linking via photostimulation, which achieves reversible regulation of the gel network structure. The concentration of 18 wt% PAC solution produces gelation under irradiation with 365 nm. In contrast, PAC gel is restored to soluble copolymers under irradiation with 254 nm. Meanwhile, the mechanical and self-healing properties of the gel were also explored. It is demonstrated that the cracks of the gel can be repaired simply, quickly, and efficiently. Furthermore, the PAC copolymer shows an excellent adhesion property based on the reversible sol–gel transition. Thus, the PAC gel has considerable potential for applications in engineering and biomedical materials.
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