【摘要】 以表面硅烷修饰的碳纳米管为基材,甲基丙烯酸为功能单体,二甲基丙烯酸乙二醇酯为交联剂,采用表面印迹技术成功制备了大黄素印迹复合材料。采用扫描电镜和透射电镜研究该印迹复合材料的形貌,结果表明,在碳纳米管表面接枝了1层稳定的约40nm厚的印迹层。在pH=8.5时,该印迹材料对大黄素具有较大吸附容量和良好选择吸附性能,最大理论吸附量(Qmax)为20.8mg/g。以该印迹材料作为固相萃取吸附剂,在85%乙醇水溶液淋洗和10%乙酸的乙醇溶液洗脱下,可实现对猕猴桃根样品粗提取液中大黄素固相萃取分离富集,回收率达到85%以上。更多还原

【Abstract】 A novel emodin(EM) imprinting material based on carbon nanotubes modified with silica gel(MWNT-MIPs) was successfully synthesized by using methacrylic acid(MAA) as a functional monomer and ethylene glycol dimethacrylate(EGDMA) as a crosslinker.The MWNT-MIPs were characterized by SEM and TEM.The results showed that a stable,uniform,about 40 nm thick imprinted materials layer was grafted on the surface of MWNT.At pH=8.5,the maximum adsorption with theoretical maximum adsorption capacity(Qmax) of 20.8 mg/g and good selective adsorption of emodin were obtained.As solid-phase extraction materials,under washing with 85% ethanol and eluting with the solution of 10% acetic acid in ethanol,the recovery of EM was over 85%,achieving efficient separation and enrichment of emodin from actinidia chinensis planch root.更多还原