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反相悬浮聚合法制备硫氰酸根阴离子印迹微球及其离子识别性质
引用本文:徐锐,杨青,李延斌,高保娇.反相悬浮聚合法制备硫氰酸根阴离子印迹微球及其离子识别性质[J].应用化学,2015,32(8):931-939.
作者姓名:徐锐  杨青  李延斌  高保娇
作者单位:中北大学化学工程系 太原 030051
基金项目:国家自然科学基金青年科学基金资助项目(21404093)
摘    要:利用反相悬浮聚合法, 成功制备了微米级硫氰酸根(SCN-)阴离子印迹微球。 以溶有分散剂Span-60的环已烷为分散介质, 以溶有模板阴离子SCN-、阳离子单体丙烯酰氧乙基三甲基氯化铵(DAC)及交联剂N, N'-亚甲基双丙烯酰胺(MBA)的水溶液为分散相, 构成反相悬浮聚合体系, 在水相液滴中使DAC发生交联聚合, 成功制备了粒径约为200 μm的离子印迹微球(IIPMs)。 以同为一价阴离子的NO3-和I-为对比离子, 深入考察研究了该离子印迹微球的离子识别与结合特性。 研究结果表明, 凭借强静电相互作用, 在水相液滴中, 阳离子单体DAC与模板阴离子SCN-紧密相结合, 故在DAC交联聚合的同时, 实现了阴离子SCN-的印迹。 所制备的阴离子印迹微球IIPMs对模板阴离子SCN-具有很高的结合能力(结合容量为3.3 mmol/g(192 mg/g))和特异的识别选择性。 该印迹微球可选择性地识别与结合离子混合溶液中的SCN-离子, 相对于NO3-和I-阴离子, IIPMs对SCN-阴离子的选择性系数分别为3.24和6.78。 该印迹微球还具有优良的重复使用性能。

关 键 词:反相悬浮聚合  印迹微球  静电相互作用  离子印迹  离子识别  
收稿时间:2014-11-11

Preparation of Thiocyanate Anion-Imprinted Microspheres via Inverse Suspension Polymerization and Their Ion Recognition Characteristics
XU Rui,YANG Qing,LI Yanbin,GAO Baojiao.Preparation of Thiocyanate Anion-Imprinted Microspheres via Inverse Suspension Polymerization and Their Ion Recognition Characteristics[J].Chinese Journal of Applied Chemistry,2015,32(8):931-939.
Authors:XU Rui  YANG Qing  LI Yanbin  GAO Baojiao
Institution:Department of Chemical Engineering, North University of China, Taiyuan 030051, China
Abstract:Micron-sized thiocyanate anion-imprinted microspheres(IIPMs) were prepared successfully with inverse suspension polymerization method. In the inverse suspension polymerization system, cyclohexane was used as dispersion medium and Span-60 was used as dispersant in the oil phase, cationic monomer of acryloxyethyltrimethyl ammonium chloride(DAC), the crosslinker N, N'-methylene bisacrylamide(MBA) and the template SCN- anion were dissolved in aqueous phase. The crosslinking copolymerization of DAC in water-in-oil droplets was carried out and SCN- IIPMs with diameter of about 200 μm were obtained. The ion recognition selectivity and binding property were investigated with monovalent anions,NO3-and I-, as the references. In water-in-oil droplets, since cationic monomer DAC associates with SCN- anion by strong electrostatic interaction, SCN- anions are imprinted while DAC produces crosslinking polymer. The prepared IIPMs possess strong binding ability(3.3 mmol/g(192 mg/g)) and selectivity. The IIPMs can selectively recognize and bind SCN- anion from a mixture withNO3-and I- ions. The coefficients of the selectivity of IIPMs are 3.24 and 6.78, respectively. The IIPMs also exhibit excellent reusability.
Keywords:reversed phase suspension  imprinted microspheres  electrostatic interaction  ion imprinting  ion recognition
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