聚乙烯亚胺修饰共轭微孔聚合物及其高效碘吸附研究  

Polyethyleneimine-modified Conjugated Microporous Polymer for Efficient Iodine Adsorption

作　　者：池程浩 侯心如 段举 廖耀祖 Cheng-hao Chi;Xin-ru Hou;Ju Duan;Yao-zu Liao(College of Materials Science and Engineering,State Key Laboratory of Advanced Fiber Materials,Donghua University,Shanghai 201620)

机构地区：[1]东华大学材料科学与工程学院先进纤维材料全国重点实验室,上海201620

出　　处：《高分子学报》2025年第4期598-610,共13页Acta Polymerica Sinica

摘　　要：共轭微孔聚合物(CMPs)由于具有高度离域的π-π共轭体系、较大的比表面积和灵活的表面活性基团等特点,使其在碘吸附领域中展现出很高的应用潜力.然而,吸附容量低、循环性能差等缺点阻碍了CMPs在碘吸附领域的发展.基于此,我们开发了一种新型的聚乙烯亚胺(PEI)化学修饰CMPs用于碘吸附.首先采用Sonogashira偶联法制备出具有高密度羧基的共轭微孔聚合物(CMP-COOH),再进行PEI化学接枝修饰得到一种富氮共轭微孔聚合物(CMP-PEI).借助PEI中丰富的氨基吸附位点进一步增强对碘分子的亲和力.结果表明,PEI分散体浓度为15%时,所制备CMP-PEI的碘吸附容量为3.26 g/g,且在398 K的温度下碘释放率高达95.6%,从而验证了所制备的CMP-PEI在碘吸附领域中具有较好的应用价值.Conjugated microporous polymers(CMPs)exhibit high potential in the field of iodine adsorption due to their highly delocalizedπ-πconjugated system,large specific surface area,and flexible surface-active groups.However,the drawbacks of low adsorption capacity and poor cycling performance have hindered the development of CMPs in the field of iodine adsorption.Herein,we propose a novel polyethyleneimine(PEI)chemically modified CMPs for efficient iodine adsorption.Firstly,the Sonogashira coupling method was used to prepare a conjugated microporous polymer with high-density carboxyl groups(CMP-COOH),followed by PEI chemical grafting modification to obtain a nitrogen rich conjugated microporous polymer(CMP-PEI).By utilizing the abundant amino adsorption sites in PEI,the affinity for iodine molecules is further enhanced.The results showed that when the PEI dispersion concentration was 15%,the iodine adsorption capacity of CMP-PEI prepared could reach up to 3.26 g/g,and the iodine release rate was as high as 95.6%at a temperature of 398 K,further indicating that the prepared CMP-PEI has good application value in the field of iodine adsorption.

关 键 词：共轭微孔聚合物 碘吸附 SONOGASHIRA偶联反应 聚乙烯亚胺修饰 

分 类 号：O647.3[理学—物理化学]