作　　者： ; ; ; ; (冷香）; (杨潇）;

机构地区： 林产化工工程湖南省重点实验室张家界427000

出　　处： 《化学通报》 2012年第1期51-57,共7页

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。 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.

关 键 词： 印迹 碳纳米管 大黄素 固相萃取

领　　域： [理学] [理学]