核壳式氯霉素分子印迹聚合物碳纳米管复合材料的制备及应用  

Preparation and Application of the Core-Shell Carbon Nanotubes-Molecularly Imprinted Composite for Chloramphenicols

作　　者：王小玉[1] 孙复钱[1] 曾国屏[1] 刘昕昕[1] 喻继文[1] 

机构地区：[1]江西省科学院应用化学研究所,江西南昌360102

出　　处：《分析科学学报》2016年第6期758-762,共5页Journal of Analytical Science

基　　金：江西省自然科学基金(No.201402BAB203017)

摘　　要：本文以多壁碳纳米管（MWCNTs）为载体,采用溶胶-凝胶法先在MWCNTs表面包覆硅层,得到MWCNTs@SiO2,再以氯霉素（Chloramphenicol,CAP）为模板,无水乙醇为溶剂,氨丙基三乙氧基硅烷（APTES）和苯基三甲氧基硅烷（PTMOS）为双功能单体,四乙氧基硅烷（TEOS）为交联剂,采用表面分子印迹技术合成具有核壳结构的CAP分子印迹聚合物包覆的碳纳米管复合材料。采用透射电镜（TEM）、红外（IR）光谱和热重（TG）分析技术对CAP分子印迹聚合物复合材料的结构、形貌进行了表征,并对其吸附性能进行了详细研究。结果表明,制备的分子印迹聚合物吸附动力学快,吸附容量大,选择性好,印迹因子达到4.2,并且可循环使用。将制备的分子印迹聚合物材料应用于实际样品鸡蛋中CAP含量的测定,回收率可达72.3%~84.1%。A core-shell multiwall carbon nanotubes-molecularly imprinted polymers （MIPs） composite for chloramphenicols（CAP） （MWCNTs @CAP-MIPs） was prepared by surface molecular imprinting technique using 3-aminopropyltriethoxysilane （ APTES ） and phenyltrimethoxysilane （ PTMOS ） as functional monomer, tetraethoxysilicane（TEOS） as cross-linking agent. The morphology and structure of the imprinted composite were characterized by transmission electron microscopy（TEM）, Fourier transform infrared spectroscopy（FT-IR） and thermogravimetric analysis（TGA）. The adsorption properties of the polymers were valued by equilibrium rebinding experiments and Langmuir analysis. The MWCNTs @ CAP-MIPs showed fast kinetics, high capacity and favorable selectivity,and the imprinting factor（IF） reached to 4.2. The feasibility of determination of CAP from real samples was testified in spiked egg samples using MWCNTs @ CAP-MIPs as the adsorbents. The recoveries of spiked CAP were ranged from 72.4% to 84.1%.

关 键 词：氯霉素 分子印迹聚合物 碳纳米管 鸡蛋 富集 

分 类 号：O658[理学—分析化学]