丙烯酸酯
聚合物
材料科学
流变学
纳米技术
生化工程
计算机科学
复合材料
工程类
共聚物
作者
Yawen Gong,Miao Yao,Jun Nie,Yong He
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-09-30
卷期号:38 (40): 12229-12234
标识
DOI:10.1021/acs.langmuir.2c01861
摘要
Healable materials are notable for their ability to recover from mechanical damage. Most methods for preparing cross-linked healable materials require the introduction of healing agents or supramolecular interactions in solvent environments. Hence, a strategy without the addition of functional component remains a key challenge. Herein, a healing strategy based on space adjustment is proposed with cross-linked poly(octadecyl acrylate) as a model, and this strategy demonstrates that the predesigned holes in cross-linked networks can supply the possibility for polymer coils to move and decrease the space density of the networks during the annealing process. As a result, the motilities of coils are enhanced, which allows them to easily penetrate and entangle in fracture sites. In contrast with the untreated cross-linked poly(octadecyl acrylate), which cannot heal, the space-adjusted poly(octadecyl acrylate) readily heals, and the highest healing efficiency is 96%. The ways in which the extent of space adjustment and the content of the cross-linking agent affect the healing efficiency are discussed, and the mechanism of the space adjustment strategy is studied through rheology research. This strategy concentrates on adjusting the spatial density of the network without the need for any functional design, which may be applied in various polymer systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI