通过仲胺与酰氯动态共价反应构建化学交联网络型咪唑功能化聚酰亚胺新策略。2,4,6-三甲基-1,3-苯二胺(DAM)的刚性结构可显著提升气体渗透性,但其在聚合物中随链段比例的增加导致选择性下降,通过调控DAM与5-氨基-2-(4-氨基苯基)苯并咪唑单体的摩尔比例及交联剂设计,实现了聚酰亚胺膜渗透性、选择性与抗塑化性能的同步优化,突破了传统渗透性-选择性权衡效应的限制。
A novel strategy was developed to construct chemically crosslinking imidazole-functionalized polyimide networks through dynamic covalent reactions between secondary amines and acyl chlorides.The rigid structure of 2,4,6-trimethyl-1,3-phenylenediamine (DAM) significantly enhanced gas permeability.However,the selectivity decreased with the increase of chain segment proportion of DAM in the polymer.By precisely tuning the molar ratio of DAM to 5-amino-2-(4-aminophenyl) benzimidazole monomers and optimizing cross-linker design,simultaneous optimization of permeability,selectivity,and anti-plasticization resistance in the polyimide membranes was achieved,overcoming the limitations of the conventional permeability-selectivity trade-off effect.
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基金资助
中央高校基本科研业务费专项资金项目(2232021A-03)
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