光致聚合物
热固性聚合物
材料科学
3D打印
固化(化学)
丙烯酸酯
酯交换
弹性体
聚合物
催化作用
化学工程
复合材料
有机化学
聚合
化学
共聚物
工程类
作者
Jingjing Cui,Fukang Liu,Zhe Lu,Shiwei Feng,Liang Chen,Yongding Sun,Jin Cui,Biao Zhang
标识
DOI:10.1002/adma.202211417
摘要
Photo-curing 3D printing technology has promoted the advanced manufacturing in various fields, but has exacerbated the environmental crisis by the demand for the chemically cross-linked thermosetting photopolymers. Here, the authors report a generic strategy to develop catalyst-free dynamic thermosetting photopolymers, based on photopolymerization and transesterification, that can enable users to realize repeatable 3D printing, providing a practical solution to the environmental challenges. That the β-carbonyl group adjacent to the ester group greatly accelerates the rate of transesterification is demonstrated. The generated resins from the immobilization of the catalyst-free reversible bonds into the photopolymers leads to a dynamic covalently crosslinked network structure upon UV based 3D printing, which exhibit controllable mechanical properties with elastomeric behaviors to thermadapt shape memory polymers. Furthermore, the resulting network can be reverted into an acrylate-functioned photopolymer that is suitable for 3D printing again, presenting an on-demand, repeatedly recyclable thermosetting photopolymer platform for sustainable 3D printing.
科研通智能强力驱动
Strongly Powered by AbleSci AI