基于SN2取代反应制备了羧甲基-β-环糊精(CM-β-CD),采用层层组装法将其成功修饰在Fe3O4磁性纳米粒子表面(MNPs),得到了CM-β-CD功能化的磁性纳米复合物(CM-β-CD-MNPs),通过透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)及振动样品磁强计(VSM)等技术手段进行了表征,考察了其对染料罗丹明B(RhB)的吸附性能.结果表明,CM-β-CD-MNPs呈球形,分散均匀,平均粒径为16 nm,饱和磁化率为54emu/g,呈超顺磁性.吸附动力学符合准二级动力学模型,且吸附1h达到平衡.吸附等温线符合Langmuir等温吸附模型,最大吸附量为135.1 mg/g.
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