聚合物
材料科学
多孔性
化学工程
季戊四醇
聚乙二醇
高分子化学
烯类反应
溶剂
多孔介质
点击化学
有机化学
化学
复合材料
工程类
阻燃剂
作者
Wanqi Feng,Weixin Li,Wenzheng Wang,Yixiang Chen,Wei Wang,Dan Yu
标识
DOI:10.1016/j.cej.2023.144078
摘要
Flexible porous polymers with good mechanical properties are very desirable in many fields, but the tedious and complicated preparation procedures severely limit their development. Herein, we report a facile and rapid preparation of the PEG porous polymers using a mixture of ethanol, polyethylene glycol diacrylate (PEGDA), and pentaerythritol tetrakis(3-mercapto-propionate) (PETMP) as porous polymers material precursor by the radical-mediated thiol-ene click chemistry combined with phase separation. The porous polymers can be formed in less than 3.5 min under UV light at low energy density (4 W m−2), and the mechanism is investigated in detail by analyzing the kinetics of thiol-ene click chemistry and the interaction between the polymer network and the porogen. The obtained porous polymers exhibit superflexibility, excellent processability, degradability and corrosion resistance for a wide range of applications, and the basic properties of porous polymers can be tuned by changing the ratio and molecular weight of the three components in the precursor, such as density (0.55–0.71 g cm−3), porosity (36.76–51.13%), mechanical properties (0.8–4.7 kPa Young's modulus) and water absorption (tunable in a wide range of 100–500%). We believe it is a promising versatile substrate that can be applied in room temperature and water-triggered shape memory, solvent-response selective separation, thermal insulation, photothermal conversion, etc.
科研通智能强力驱动
Strongly Powered by AbleSci AI