Study on Inclusion Interaction of β-Cyclodextrin/Magnetic Nanocopolymers to Acridine Yellow
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国家科技期刊平台
NETL
NSTL
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本文采用层层组装方法制备了具有磁性纳米内芯和包合吸附活性外层的β-环糊精/Fe3O4磁性纳米共聚物(β-cyclodextrin/Fe3O4 Magnetic nanocopolymers,β-CD-MNPs),磁性内芯使得分离更加方便,而包合吸附活性层通过主客体超分子化学作用提高目标物的吸附选择性.首先,采用化学共沉淀法制Fe3O4磁性纳米粒子(Fe3O4 Mag-netic nanoparticles,MNPs),然后制备得到3-氨基丙基-三乙氧基硅烷(3-Aminopropyl triethoxysilane,APTES)表面修饰的Fe3O4磁性纳米粒子(APTES-MNPs).接着,采用合成的6-对甲苯磺酰基-β-环糊精(6-TsO-β-CD)与AP-TES-MNPs进行共价缩合反应,得到β-CD-MNPs,共聚物的平均粒径为(10.91±2.41)nm.紫外-可见分光光度法检测在NH3-NH4Cl缓冲介质(pH 10)中,β-CD-MNPs对致癌性的碱性荧光染料吖啶黄(AY)的包合情况.结果表明:β-CD-MNPs对AY的包合过程基本符合Langmuir单分子层吸附机理,最大包合量28.9 mg·g-1,包合剂β-CD-MNPs回收率可达93%.
This article adopts a layer by layer assembly method to synthesize β-cyclodextrin/Fe3O4 nanocomposite(β-CD-MNPs)with magnetic core and inclusion adsorption active outer layer.The magnetic nanocore makes separation more convenient,while the active layer enhances the adsorption selectivity of the target analyte through host-guest supramolecular chemical interactions.First,Fe3O4 magnetic nanoparticles(MNPs)were prepared by chemical coprecipitation method;Second,Fe3O4 magnetic nanoparticles(APTES MNPs)with surface modification of 3-aminopropyl triethoxysilane(APTES)were obtained;Next,the synthesized 6-p-tolu-enesulfonyl-β-cyclodextrin(6-TsO-β-CD)undergoes covalent condensation reaction with APTES-MNPs to obtain β-CD-MNPs.The average particle size of β-CD-MNPs copolymers is(10.91±2.41)nm.UV-Visible spectrophotometry was used to detect β-CD inclu-sion of carcinogenic alkaline fluorescent dye acridine yellow(AY)by β-CD-MNPs in NH3-NH4Cl buffer medium(pH 10).The re-sults indicate that the inclusion process of β-CD-MNPs for AY basically follows the Langmuir monolayer adsorption mechanism,with a maximum inclusion amount of 28.9 mg·g-1 and the recovery rate of the inclusion agent β-CD-MNPs can reach 93%.
magnetic nanoparticlesβ-cyclodextrincopolymeracridine yellowinclusion amount
国家科技期刊平台
NSTL
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