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。
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.
基金项目
国家自然科学基金(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)
NETL
NSTL
维普
万方数据