硅胶表面水胺硫磷分子印迹聚合物的制备及其性能  

Synthesis and Performance of Isocarbophos Molecular Imprinted Sillica Surface

作　　者：沈金灿[1,2] 吴凤琪[1] 肖陈贵[1] 张毅[1] 韩瑞阳[1] 洪小柳[1] 

机构地区：[1]深圳出入境检验检疫局食品检验检疫技术中心,深圳518045 [2]深圳市食品安全检测技术研发重点实验室,深圳518045

出　　处：《应用化学》2014年第1期84-88,共5页Chinese Journal of Applied Chemistry

基　　金：国家质检总局科研项目(2012K187);深圳市基础研究项目(JC201105190972A)资助~~

摘　　要：以水胺硫磷为模板分子,甲基丙烯酸(MAA)为功能单体,三羟甲基丙烷三甲基丙烯酸酯(TRIM)为交联剂,采用表面分子印迹技术,以商品化硅胶为基体,合成了对有机磷农药水胺硫磷具有良好选择性的表面分子印迹聚合物(MIP)。用红外光谱(IR)、扫描电子显微镜(SEM)和元素分析等技术分别对表面印迹聚合物进行了结构表征和表面形态观察;静态吸附平衡实验和Scatchard分析表明,该印迹聚合物中存在着两类不同的结合位点,离解常数分别为4.84×10-3和15.2×10-3mol/L。与非印迹聚合物相比,MIP对水胺硫磷有较大的特异性吸附能力,其印迹因子为2.73。A molecular imprinting polymer（MIP） using isocarbophos as template molecule, methacrylic acid as functional monomer, trimethylolpropane trimethacrylate （TRIM） as cross-linking agent was synthesized on the surface of silica gels. The MIP has been fully characterized by IR spectroscopy, SEM, elemental analysis and so on. The static adsorption equilibrium experiments and the Scatchard analysis showed that there were two kinds of binding sites in the MIP. The dissociation constants of these two binding sites are 4. 84 × 10 -3 and 15.2 ×10-3 mob/L, respectively. The MIP exhibits improved specific adsorption capacity compared with that of non-imprinted polymers. The imprint factor of MIP is 2.73.

关 键 词：水胺硫磷 表面印迹 硅胶 识别特性 

分 类 号：O632.5[理学—高分子化学]