自愈水凝胶
聚合物
形状记忆聚合物
甲基丙烯酸
丙烯酸
材料科学
形状记忆合金
化学工程
复合材料
高分子化学
智能材料
化学
纳米技术
共聚物
工程类
作者
Zhiye Yuan,Yijie Jin,Yu Wu,Xinjun Wu,Nan Hai,Jianlei Lu,Chuanzhuang Zhao,Jiawei Zhang
标识
DOI:10.1021/acs.macromol.4c00875
摘要
The properties of intelligent polymeric materials are essentially determined by their chemical structures. Shape memory hydrogels that utilize hydrophobic aggregation at elevated temperatures to stabilize temporary shapes, the association of polymer networks is similar to that of thermoresponsive polymers. To realize a precise control on the shape memory function of these materials and broaden their practical applications, it is essential to build up a structure–property relationship on a molecular level. In this study, we fabricated a series of poly(acrylic acid–methacrylic acid)/Ca(CH3COO)2 shape memory hydrogels with cooling-induced shape transformation behavior. The results showed that the incorporation of α-methyl groups would restrict the hydrophobic aggregation of hydrogel networks, and the soft-to-stiff transition temperature of the hydrogels would shift to elevated temperatures with the increasing density of α-methyl groups. Therefore, the shape recovery process could be regulated by adjusting the association degree of the polymer networks. Finally, the hydrogels were explored as smart capsules with sequential drug delivery capacity and as dredging devices capable of removing thrombus. This study reveals the influence of α-methyl groups on the association dynamics of the poly(acrylic acid–methacrylic acid)/Ca(CH3COO)2 hydrogels, which would promote the design of novel shape memory polymers guided by the relationship between chemical structure and properties.
科研通智能强力驱动
Strongly Powered by AbleSci AI