多壁碳纳米管表面大黄素印迹材料制备及吸附性能研究  

Preparation and Adsorption Performance of Emodin Imprinted Material Based on Multi-wall Carbon Nanotubes

作　　者：刘曦[1,2] 张华斌[2] 冷香 杨潇 张朝晖[1,2,3] 聂利华[3] 

机构地区：[1]林产化工工程湖南省重点实验室,张家界427000 [2]吉首大学化学化工学院,吉首416000 [3]湖南大学化学生物传感与计量国家重点实验室,长沙410082

出　　处：《化学通报》2012年第1期51-57,共7页Chemistry

基　　金：国家自然科学基金项目(21005030);湖南省教育厅重点项目(10A099);林产化工工程湖南省重点实验室开放基金;湖南省大学生创新基金(JSU-CX-2010-46)资助

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 

分 类 号：TB383.1[一般工业技术—材料科学与工程]