多孔有机聚合物(POPs)是一类由不同几何形状的有机单元通过强共价键连接而成。在有机多孔聚合物结构中引入N、O等杂原子,赋予聚合物更多的功能性。以三聚氯氰的分级亲核取代反应,通过其与4,4′-二氨基二苯醚反应合成含醚键多孔有机聚合物(OD POP)。通过结构表征表明实验得到了热稳定性较高的含醚键的非晶态多孔有机聚合物。碘吸附的结果显示,OD POP对碘蒸气的饱和吸附容量可达366%,且对碘蒸气捕获的可循环利用性良好。OD POP在碘-碘化钾溶液吸附过程遵循准二级动力学、Freundlich模型。这表明该吸附过程包含物理和化学吸附。此外,吸附过程是一个吸热、熵增自发的不可逆过程。
Porous organic polymers (POPs) are a type of materials constructed from organic units with different geometric shapes connected by strong covalent bonds.Introducing heteroatoms such as N and O into the frameworks of organic porous polymer structure endows the polymer with more functionality.Hierarchical nucleophilic substitution reaction of cyanuric chloride was used to synthesize porous organic polymers containing ether bonds (OD POP) by reacting with 4,4′-diaminodiphenyl ether.Through structural characterization,it was demonstrated that amorphous porous organic polymers containing ether bonds with high thermal stability were obtained.Iodine adsorption results revealed that the saturated adsorption capacity of OD POP for iodine vapor could reach 366wt%,and it had good recyclability for capturing iodine vapor.The adsorption process of OD POP in iodine potassium iodide solution followed quasi second order kinetics and the Freundlich model.This indicated that the adsorption process involved both physical and chemical adsorption.In addition,the adsorption process was an endothermic,and entropy-increasing,spontaneous and irreversible process.
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基金资助
陕西省油气田环境污染控制技术与储层保护重点实验室开放课题项目(XSYU-HJ-2020-001);陕西省教育厅重点研发项目(23JY028)
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