聚氨酯
单体
材料科学
乙二醇
聚合物
化学工程
催化作用
极限抗拉强度
高分子化学
聚乙二醇
有机化学
复合材料
化学
工程类
作者
Panpan Hao,Ruiqi Zhang,Kaixin Xu,Xingmei Lü,Qing Zhou,Jiayu Xin,Junli Xu,Yi Li
标识
DOI:10.1016/j.cej.2024.148605
摘要
Polyethylene terephthalate (PET) is one of the most widely used polymers, and its intensive use has resulted in significant and growing environmental problems. The urgent need for a more efficient approach that avoids the cumbersome depolymerisation process and monomer purification to produce high-value products is evident. In this study, a simple and one-pot strategy was used to obtain polyurethane pre-polymer through the glycolysis of PET. The polyurethane network and the second polymer network formed by the monomers polyacrylic acid and polyacrylamide were co-introduced into the ionicgels to create a dual network structure. Glycolysis of PET was catalyzed using the ionic liquid catalyst [EMIM][DCA], resulting in a 100 % conversion. The PET alcoholysis solution consisted of 90.47 % BHET, 9.53 % oligomers containing benzene rings, and unreacted glycol. Polyurethanes synthesized through the one-pot method using PET hydrolysate, with benzene ring-containing BHETs and oligomers as the hard domains and ethylene glycol as the soft domains, exhibited excellent mechanical properties. PET-based polyurethane was employed in the preparation of dual network-structured ionicgels. As a result, the ionic gels exhibited a good stress–strain of 4.2 MPa and 990 %, along with a high conductivity (0.09 S/cm) and ultrahigh sensitivity. Furthermore, it could easily repair the broken ionicgels at 25 ℃ for 6 h, thus restoring their original tensile, and sensing properties.
科研通智能强力驱动
Strongly Powered by AbleSci AI