PREPARATION OF URSOLIC ACID IMPRINTED POLYMERS BASED ON MULTI-WALLED CARBON NANOTUBES AND THEIR APPLICATION IN SOLID PHASE EXTRACTION

ZHANG Chao-Hui; YANG Xiao; ZHANG Hua-Bin; ZHANG Ming-Lei; LUO Li-Juan; CHEN Xing; NIE Li-Hua

doi:10.3724/SP.J.1105.2011.11016

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PREPARATION OF URSOLIC ACID IMPRINTED POLYMERS BASED ON MULTI-WALLED CARBON NANOTUBES AND THEIR APPLICATION IN SOLID PHASE EXTRACTION

Research Article | 更新时间：2021-03-19

- PREPARATION OF URSOLIC ACID IMPRINTED POLYMERS BASED ON MULTI-WALLED CARBON NANOTUBES AND THEIR APPLICATION IN SOLID PHASE EXTRACTION
- Acta Polymerica Sinica Issue 12, Pages: 1470-1476(2011)
- 作者机构：
  
  1. 吉首大学化学化工学院吉首,416000
  2. 湖南大学化学传感与计量国家重点实验室长沙 410082>
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2011.11016
  CLC：
- Published：20 December 2011，
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ZHANG Chao-Hui, YANG Xiao, ZHANG Hua-Bin, ZHANG Ming-Lei, LUO Li-Juan, CHEN Xing, NIE Li-Hua. PREPARATION OF URSOLIC ACID IMPRINTED POLYMERS BASED ON MULTI-WALLED CARBON NANOTUBES AND THEIR APPLICATION IN SOLID PHASE EXTRACTION. [J]. Acta Polymerica Sinica (12):1470-1476(2011)
DOI：

ZHANG Chao-Hui, YANG Xiao, ZHANG Hua-Bin, ZHANG Ming-Lei, LUO Li-Juan, CHEN Xing, NIE Li-Hua. PREPARATION OF URSOLIC ACID IMPRINTED POLYMERS BASED ON MULTI-WALLED CARBON NANOTUBES AND THEIR APPLICATION IN SOLID PHASE EXTRACTION. [J]. Acta Polymerica Sinica (12):1470-1476(2011) DOI： 10.3724/SP.J.1105.2011.11016.

摘要

以聚乙烯醇修饰的多壁碳纳米管(MWCNTs)为基材

熊果酸(UA)为模板分子

甲基丙烯酸(MAA)为功能单体

乙二醇二甲基丙烯酸酯(EGDMA)为交联剂

采用表面印迹技术在碳纳米管表面合成对熊果酸具有良好选择性的分子印迹聚合物(MWCNTs-MIPs).讨论了不同摩尔比例的功能单体与模板分子合成印迹聚合物的效果

得出最佳的摩尔比为4∶1.采用红外光谱、扫描电镜对该印迹聚合物进行表面形态表征

结果表明在碳纳米管表面接枝一层稳定、均匀、20~25 nm厚的印迹材料.采用静态吸附和吸附动力学实验研究其吸附性能

结果表明MWCNTs-MIPs对熊果酸具有特异吸附性

其最大吸附量为53.1 mol/g

在60 min时达到吸附平衡.优化固相萃取条件

结果表明采用100%甲醇溶液淋洗和10%乙酸甲醇溶液洗脱效果最好.将该印迹聚合物装填于固相萃取柱中

可将熊果酸与其结构类似物齐墩果酸进行分离.

Abstract

A novel surface molecularly imprinted polymer was synthesized using poly(vinyl alcohol) modified multi-walled carbon nanotubes (MWCNTs) as supporting matrix

ursolic acid (UA) as the template molecule

methacrylic acid (MAA) as the functional monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-linking agent.Effect of different molar ratios of the functional monomer to the template on the performance of the synthesized MWCNTs-MIPs was discussed and the results showed that the optimum ratio was 4∶1.The multi-walled carbon nanotubes-molecularly imprinted polymers (MWCNTs-MIPs) were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).The results showed that a stable imprinted layer was grafted on the MWCNTs surface successfully.The adsorption properties were demonstrated by static adsorption and adsorption kinetic experiments.The results demonstrated that the MWCNTs-MIPs had specific selectivity for UA

yielding a maximum adsorption capacity of 53.1 mol/g and the equilibrium time took about 60 min.Solid phase extraction condition was optimized

and the optimal condition was washing with 100% methanol and eluting with 10% acetic acid methanol solution. The solid-phase extraction column packed with MWCNTs-MIPs could be applied to separate ursolic acid (UA) from similar structure oleanolic acid (OA).

关键词

表面印迹碳纳米管固相萃取熊果酸

Keywords

Surface molecular imprintingCarbon nanotubesSolid-phase extractionUrsolic acid

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State Key Laboratory of Organic-Inorganic Composites, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology

School of Textiles, Tianjin Polytechnic University

Key Laboratory of Advanced Textile Composites, Ministry of Education

天津科技大学化工与材料学院

College of Material Science and Engineering, Beijing University of Chemical Technology

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