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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (21): 2238-2242. 上一篇    下一篇

研究论文

三维有序大孔交联聚苯乙烯的功能化及其吸附性能

王小梅1，原丽霞1，曲佳燕1，张宇1，张旭*,1,2   

  1. (1河北工业大学化工学院 天津 300130)
    (2中国科学院化学研究所 高分子物理与化学国家重点实验室 北京100080)
  • 投稿日期:2010-05-06 修回日期:2010-06-12 发布日期:2010-07-12
  • 通讯作者: 张旭 E-mail:xuzhang@hebut.edu.cn
  • 基金资助:

    响应性三维有序大孔聚烯烃材料的构筑及其性能研究;三维有序大孔材料功能化及其在吸附分离中的应用

Functionalization and Adsorption Properties of Three-dimensionally Ordered Macroporous Cross-linked Polystyrene

Wang Xiaomei1 Yuan Lixia1 Qu Jiayan1 Zhang Yu1 Zhang Xu*,1,2   

  1. (1 Department of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130)
    (2 State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 100080)
  • Received:2010-05-06 Revised:2010-06-12 Published:2010-07-12
  • Contact: Xu Zhang E-mail:xuzhang@hebut.edu.cn

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本研究采用二氧化硅胶体晶模板法制备了孔径为890 nm的三维有序大孔交联聚苯乙烯(3DOM CLPS), 通过亲核取代反应将亲水性悬臂(二缩三乙二醇, TEG)接枝到3DOM CLPS孔壁, 利用TEG另一端的活性羟基, 将2-巯基苯并噻唑(MBZ)引入到TEG链段末端. 利用红外光谱及元素分析对产物进行了表征. 扫描电镜分析表明功能化后的3DOM CLPS保留了结构有序、孔与孔之间相互连通的微观结构特点. 测定了该功能化3DOM CLPS对Ag＋和Hg2＋离子的饱和吸附容量, 饱和吸附容量分别为0.78和0.39 mmol/g. 研究了不同温度下的吸附动力学, 相互连通的有序大孔结构有利于引入长链亲水性悬臂, 促进孔内外的物质交换.

关键词: 三维有序大孔交联聚苯乙烯, 功能化, 亲水悬臂, 杂环功能基团, 吸附

Three-dimensionally ordered macroporous cross-linked polystyrene (3DOM CLPS) with pore size of 890 nm was prepared by sacrifice template method. The hydrophilic spacer arm (triethylene glycol, TEG) was grafted to the 3DOM CLPS via nucleophilic substitution reaction. The 2-mercaptobenzothiazole (MBZ) group was attached via TEG to framework of 3DOM CLPS. The final product was characterized by FT-IR and element analysis. In addition, the results of SEM showed that the ordered and interconnected macroporous structure is well preserved after functionalization. The relative large pores of 3DOM CLPS allow introduction of longer polymer chains to the framework, and not to plug the channels. The interconnected channels can accelerate the materials exchange. Furthermore, the adsorption capacities and adsorption kinetics of the functionalized 3DOM CLPS were tested. The adsorption capacities for Ag＋ and Hg2＋ were 0.78 and 0.39 mmol/g, respectively. The results indicated that introduction of hydrophilic spacer arms between the 3DOM framework and heterocyclic functional groups improve the adsorption capacity. The adsorptions kinetic at different temperatures were also investigated.

Key words: three-dimensionally ordered macroporous polymer, functionalization, hydrophilic spacer arm, heterocyclic functional group, adsorption