碳纳米管基表面温敏离子印迹材料的制备及吸附性能研究

Preparation and absorption performance of surface thermo-sensitivity ion imprinted material based on carbon nanotube

以磁性碳纳米管为基质,壳聚糖为主功能单体,N-异丙基丙烯酰胺为接枝聚合单体,Ni(Ⅱ)为金属离子模版,采用反相悬浮聚合法制备磁性表面温敏离子印迹材料(MIIPs),并通过单因素实验法优化MIIPs的制备工艺。利用红外、扫描电镜(SEM)对其结构和表面形貌进行表征,利用分光光度法测定MIIPs的吸附性能。结果表明,MIIPs对Ni(Ⅱ)具有良好的饱和吸附量和温敏吸附特性,其最大平衡吸附量为24.58 mg/g。

A novel magnetic surface thermo-sensitivity ion imprinted polymer（MIIP） is synthesized through inverse suspension polymerization method with magnetic carbon nanotubes as matrix,chitosan as main functional monomer,Nisopropylacrylamide as grafting monomer and Ni（Ⅱ） as a metal ion imprinting template.The preparation process of MIIP is optimized by single factor experiment. The structure and properties of prepared MIIP are characterized by FTIR and SEM and its adsorption properties are determined by spectrophotometry.The results show that the prepared MIIP has good saturated adsorption and thermo-sensitive adsorption properties to Ni（Ⅱ）,with the maximum equilibrium adsorption capacity at 24. 58 mg·g^（-1）.