中文摘要：

采用层层自组装法合成了一种新型的磺丁醚-β-环糊精/Fe3O4杂化的磁性纳米复合体（SBE-β-CD/Fe3O4 MNP）.β-环糊精与1,4-丁磺酸内酯发生亲核取代反应得到磺丁醚-β-环糊精,柠檬酸进一步修饰磺丁醚-β-环糊精使其具有羧基基团,与阿拉伯胶修饰后的含有氨基的磁性纳米粒子进行脱水缩合制得SBE-β-CD/Fe3O4 MNP.运用X射线衍射（XRD）、透射电镜（TEM）、动态光散射（DLS）、红外光谱法（FTIR）和热重分析（TGA）方法进行表征,证实了Fe3O4 MNP上接枝了SBE-β-CD.根据热重分析曲线（TGA）可估算出磁性纳米粒子表面SBE-β-CD的量及每个Fe3O4磁性纳米粒子结合SBE-β-CD分子的个数.

英文摘要：

A novel magnetic nano-composite from the combination of Fe3O4 magnetic nanoparticles（MNP） and sulfobutylether-β-CD（SBE-β-CD） has been developed.Fabrication of composite SBE-β-CD/Fe3O4 MNP is based on conjugating the citrate-modified SBE-β-CD onto the gum arabic-modified MNP via carbodiimide activation.The structural property,morphology and hydrodynamic diameter distribution were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM） and dynamic light scattering（DLS）,respectively.The SBE-β-CD grafting was confirmed by Fourier transformation-infrared spectrometry（FTIR）.The amount of SBE-β-CD grafted on MNP and the number of SBE-β-CD molecules immobilized on each MNP were determined by thermogravimetric analysis（TGA）.