具有高选择性吸附的表面分子印迹磁性纤维素微球的制备与性能

发布时间：2018-06-17 12:30

本文选题：纤维素微球 + 四氧化三铁　；参考：《高等学校化学学报》2016年08期

【摘要】：以纤维素和纳米Fe_3O_4为原料制得磁性纤维素微球,在纤维素微球表面选择合适的模板分子,以甲基丙烯酸、丙烯酰胺和N,N'-亚甲基双丙烯酰胺为功能单体,采用水溶液聚合法制得表面分子印迹磁性纤维素微球.采用傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和振动样品磁强计(VSM)等表征了分子印迹聚合物微球的结构.以罗丹明B(Rh B)为模板分子,通过吸附动力学与吸附热力学实验研究了表面分子印迹磁性纤维素微球对Rh B的吸附性能,结果表明,制备的表面分子印迹磁性纤维素微球对罗丹明B具有特异性识别作用,饱和吸附量达到0.542 mg/mg,吸附平衡时间为10 h左右.表面分子印迹磁性纤维素微球大大降低了对吸附环境的依赖,并可重复利用.
[Abstract]:Magnetic cellulose microspheres were prepared from cellulose and nano-Fe _ 3O _ S _ 4 as raw materials. Suitable template molecules were selected on the surface of cellulose microspheres, and methacrylic acid, acrylamide, and N- Na-methylene bisacrylamide were used as functional monomers. The surface molecularly imprinted magnetic cellulose microspheres were prepared by aqueous solution polymerization. The structure of molecularly imprinted polymer microspheres was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and vibratory sample magnetometer (VSM). The adsorption properties of magnetic cellulose microspheres imprinted on the surface for Rh B were studied by adsorption kinetics and adsorption thermodynamics with Rhodamine BhB as template molecules. The surface molecularly imprinted magnetic cellulose microspheres can recognize Rhodamine B specifically. The saturated adsorption capacity is 0.542 mg / mg and the adsorption equilibrium time is about 10 h. The surface molecularly imprinted magnetic cellulose microspheres greatly reduce the dependence on the adsorption environment and can be reused.
【作者单位】：华东师范大学物理与材料学院上海市磁共振重点实验室;
【基金】：国家自然科学基金(批准号:51273067,21544003)资助~~
【分类号】：O636.11

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