Söylemez Meshude Akbulut, Güven Olgun
Department of Chemistry, Hacettepe University, Ankara, Turkey.
J Mol Recognit. 2018 Jan;31(1). doi: 10.1002/jmr.2676. Epub 2017 Oct 6.
This study presents the preparation of molecularly imprinted matrices by using radiation-induced grafting technique onto polyethylene/polypropylene (PE/PP) non-woven fabrics. Atrazine imprinted polymers were grafted onto PE/PP non-woven fabrics through the use of methacrylic acid (MAA) and ethylene glycol dimethylacrylate (EGDMA) as the functional monomer and crosslinking agent, respectively. Grafted MIPs were characterized by attenuated total reflectance Fourier transform infra-red spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), elemental analysis, scanning electron microscopy (SEM), and positron annihilation lifetime spectroscopy (PALS). The average diameter of free volume holes was determined as 0.612 nm which correlates very well with the size of template molecule atrazine, 0.512 nm. Binding behaviors were investigated against various factors, such as concentration of template molecule, pH, and contact time. Furthermore, the specific selectivity of grafted MIP on non-woven fabric was studied by using other common triazine compounds, such as simazine and metribuzine which show structural similarities to atrazine. The specific binding values for atrazine, simazine, and metribuzine were determined as 40%, 2.5%, and 1.5%, respectively.
本研究介绍了通过辐射诱导接枝技术在聚乙烯/聚丙烯（PE/PP）无纺布上制备分子印迹基质的方法。通过分别使用甲基丙烯酸（MAA）和乙二醇二甲基丙烯酸酯（EGDMA）作为功能单体和交联剂，将阿特拉津印迹聚合物接枝到PE/PP无纺布上。对接枝的MIPs进行了衰减全反射傅里叶变换红外光谱（ATR-FTIR）、X射线光电子能谱（XPS）、元素分析、扫描电子显微镜（SEM）和正电子湮没寿命谱（PALS）表征。自由体积孔的平均直径确定为0.612nm，这与模板分子阿特拉津的尺寸0.512nm非常吻合。研究了对接枝MIPs与各种因素的结合行为，如模板分子浓度、pH值和接触时间。此外，通过使用其他与阿特拉津结构相似的常见三嗪化合物，如西玛津和嗪草酮，研究了接枝在无纺布上的MIP的特异性选择性。阿特拉津、西玛津和嗪草酮的特异性结合值分别确定为40%、2.5%和1.5%。
