磁性碳纳米管表面新型壬基酚印迹纳米复合材料制备及吸附性能

采用聚苯胺包覆的磁性多壁碳纳米管为载体,以壬基酚(NP)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)为交联剂制备新型磁性壬基酚印迹复合萃取材料。 采用扫描电子显微镜(SEM)、红外光谱(FT-IR)和样品振动磁强计(VSM)等技术手段对该磁性印迹复合材料进行表征和分析,结果表明,在磁性碳纳米管表面成功接枝厚度为60~70 nm的印迹聚合层。 采用高效液相色谱(HPLC)技术对该印迹复合材料的吸附性能进行探讨,结果表明,该磁性印迹复合材料对壬基酚具有特异性吸附性能,最大吸附量为38.46 mg/g。 结合HPLC检测技术,该磁性印迹复合材料成功用于分离富集饮用水中的壬基酚。

Preparation and Adsorption Properties of Novel Magnetic Nonylphenol Molecularly Imprinted Nanocomposite Material Based on Multiwalled Carbon Nanotubes

A novel magnetic nonylphenol molecularly imprinted composite extraction materials(MWNTs@Fe₃O₄-MIPs) was prepared based on multiwalled carbon nanotubes(MWNTs) using nonylphenol(NP) as the template, methacrylic acid(MAA) as the functional monomer and ethylene glycol dimethacrylate(EGDMA) as the cross-linker. The MWNTs@Fe₃O₄-MIPs were characterized by scanning electron microscopy(SEM), Fourier-transform infrared(FT-IR) analysis and vibrating sample magnetometer(VSM). The results show that a thermally stable magnetic imprinted layer with the thickness of 60~70 nm was coated steadily on the MWNTs surface. Adsorption performance of the MWNTs@Fe₃O₄-MIPs was investigated by magnetic solid phase extraction(M-SPE) and high-performance liquid chromatography(HPLC) technology. The results indicate that the MWNTs@Fe₃O₄-MIPs possessed higher selectivity towards nonylphenol(NP) with the maximum adsorption capacity of 38.46 mg/g. This magnetic molecularly imprinted composite material combining with HPLC technology is successfully applied to the separation and the enrichment of nonylphenol(NP) in environmental water samples.