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Preparation of Highly-Selective Metal Adsorbents by Surface Imprinting Method

表面印迹法制备高选择性金属吸附剂

基本信息

批准号：
06651031
负责人：
MAEDA Mizuo
金额：
$ 1.34万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

We propose a metal ion-imprinted microsphere as a new metal ion-selective adsoebent. Imprinted microspheres were prepared by seed emulsion polymerization of divinylbenzene, stirene, butyl acrylate, and methacrylic acid. The imprinted structure was introduced on the carboxylated microsphere by surface-imprinting, in which the carboxyl groups were reorganized through complexation with metal ions on the surface (at pH 5.0) and then fixed by crosslinking polymerization in their specific orientation.The Cu (II) , Ni (II) , and Co (II) -imprinted microspheres were obtained as submicron particles with average diameters of 0.55-0.60 mum. They were immediately used as a metal ion-selective adsorbent without any further treatment, such as grinding and sieving. The adsorption behaviors of metal ions were examined, and the imprinted effects were verified clearly. The imprinted microsheres adsorbed the corresponding guest ion more effectively than did unimprinted ones. Unimprinted and Cu (II) -imprinted microspheres were prepared under several pH (4.0,5.0,5.6,6.0) conditions in the surface-imprinting step. The maximum imprinting effect was provided by microspheres obtained at pH5.6.Surface-imprinted resins were also prepared by emulsion polymerization using oleyl phenyl hydrogenphosphonate as a host surfactant, sodium dodecyl sulfate (SDS) as a co-surfactant and divinylbenzene as a resin matrix-forming monomer. The template-dependent selectivity was clearly demonstrated for Cu (II) , Zn (II) , and Cd (II). This phosphate-carrying resin would be promising for selective separation of rare earth metal and uranyl ions.

本文提出一种金属离子印迹微球作为一种新型的金属离子选择性吸附剂。以二乙烯苯、乙烯、丙烯酸丁酯和甲基丙烯酸为原料，采用种子乳液聚合法制备了印迹微球。通过表面印迹将印迹结构引入羧基化微球上，羧基通过与表面金属离子（pH 5.0）络合重组，然后通过交联聚合将其固定在特定的方向上。Cu （II）、Ni （II）和Co （II）印迹微球均为亚微米颗粒，平均直径为0.55 ~ 0.60微米。它们立即被用作金属离子选择性吸附剂，无需任何进一步处理，如研磨和筛分。考察了其对金属离子的吸附行为，清楚地验证了印迹效应。印迹微片比未印迹微片更有效地吸附相应的客体离子。在不同的pH（4.0,5.0,5.6,6.0）条件下制备了Cu （II）印迹微球和未印迹微球。印迹效果最好的是ph为5.6的微球。以氢膦酸油基苯基为主表面活性剂，十二烷基硫酸钠（SDS）为助表面活性剂，二乙烯苯为树脂基体形成单体，采用乳液聚合法制备了表面印迹树脂。对Cu （II）、Zn （II）和Cd （II）具有模板依赖的选择性。这种载磷树脂在稀土金属和铀酰离子的选择性分离中具有广阔的应用前景。