硅胶印迹聚合物的制备及对钆离子吸附性能研究  

STUDY ON THE PREPARATION AND ADSORPTION PROPERTIES OF ION-IMPRINTED POLYMER OF SILICA GEL FOR GADOLINIUM(Ⅲ)

作　　者：程玉雯 黎先财 胡伟强 CHENG Yuwen ,LI Xiancai, HU Weiqiang(Chemical Department, Nanchang University of China, Nanchang 330031, Chin)

机构地区：[1]南昌大学化学学院,南昌330031

出　　处：《离子交换与吸附》2018年第1期19-28,共10页Ion Exchange and Adsorption

基　　金：国家自然科学基金(51664042)资助

摘　　要：选择聚乙烯亚胺为功能单体,利用3-氯丙基三乙氧基硅烷和戊二醛将Gd^(3+)交联包裹在硅胶表面接枝,制备硅胶印迹聚合物。通过红外光谱和热重分析研究印迹聚合物的结构性质,采用静态吸附实验对其吸附性能进行分析对比。实验结果表明,采用聚乙烯亚胺为功能单体制备的印迹聚合物对Gd^(3+)的最大吸附量可以达到82.72mg/g,通过对其进行热力学分析和动力学分析,得知基于硅胶表面制备的聚乙烯亚胺印迹聚合物对Gd^(3+)的吸附可以用Freundlich模型和准二级动力学模型描述,且粒子内扩散过程为其速控步骤。实验证明,该印迹聚合物对Gd^(3+)具有一定的选择性。Ion-imprinted polymer of silica gel takes polyethyleneimine（PEI） as functional monomer, and wraps Gd^3＋ up with pentanedial （GA）. The structure and properties of ion-imprinted polymer of silica gel can be studied by FT-IR and TGA, the adsorption properties was investigated and compared by a series of static adsorption experiments. According to the actual experiment results, for Gd^3＋, the maximum adsorption capacity of the ion-imprinted polymer, which is prepared by PEI, can reach up to 82.72mg/g. Thermodynamic studies and kinetic studies revealed that the adsorption of ion-imprinted polymer can be better described by Freundlich isotherm model and Pseudo-second-order kinetic model. And adsorption process is controlled by particle diffusion process. Moreover, Gd^3＋ can be selected by the ion-imprinted polymer.

关 键 词：钆离子 印迹聚合物 聚乙烯亚胺 选择性识别 

分 类 号：O647.3[理学—物理化学]