CAJ | 학술논문

在多壁碳纳米管表面接枝的双键键合,以绿原酸为模板,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,采用沉淀聚合技术,在碳纳米管表面成功制备绿原酸印迹材料.采用红外光谱、扫描电镜和热重分析研究此印迹材料的性能.结果表明,在碳纳米管表面接枝一层稳定、均匀、30～40 nm厚的印迹材料.采用高效液相色谱研究此印迹材料的吸附动力学及吸附容量,实验结果表明,此印迹材料对绿原酸的结合存在两个结合位点,最大吸附容量Qmax分别为21.5和32.7 μmol/g.以此印迹材料作为固相萃取剂,优化萃取条件,成功应用于金银花提取液中绿原酸的富集分离研究,富集因子达25.
재다벽탄납미관표면접지적쌍건건합,이록원산위모판,갑기병희산위공능단체,을이순이갑기병희산지위교련제,채용침정취합기술,재탄납미관표면성공제비록원산인적재료.채용홍외광보、소묘전경화열중분석연구차인적재료적성능.결과표명,재탄납미관표면접지일층은정、균균、30～40 nm후적인적재료.채용고효액상색보연구차인적재료적흡부동역학급흡부용량,실험결과표명,차인적재료대록원산적결합존재량개결합위점,최대흡부용량Qmax분별위21.5화32.7 μmol/g.이차인적재료작위고상췌취제,우화췌취조건,성공응용우금은화제취액중록원산적부집분리연구,부집인자체25.
A novel molecularly imprinted polymers (MIPs) was prepared based on multiwalled carbon nanotubes (MWNTs) by using chlorogenic acid as template, methacrylic acid(MAA) as the functional monomer, and ethylene glycol dimethacrylate (EGDMA) as the cross-linker. Infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis were employed to characterize the composite structure and morphology, the results showed that a stable imprinted layer was grafted on the MWNTs with the average thickness of 30-40 nm. The dynamic adsorption and static adsorption experiments were also executed and the results showed that two kinds binding sites with the maximum apparent binding constant 21.5 μmol/g and 32.7 μmol/g existed v.i. between the imprinted polymers and chlorogenic acid. As solid phase extraction (SPE) materials, the separation and enrichment of chlorogenic acid from honeysuckle were successful with a enrichment factor of 25.