磺酰化β-环糊精超分子吸附剂的制备

Preparation of β-cyclodextrin Supramolecular Adsorbent

本试验中以正硅酸乙酯为原料,无水乙醇和水为共溶剂,浓氨水为催化剂,通过正硅酸乙酯的水解与缩合制备二氧化硅分散体系;以硅烷偶联剂对二氧化硅进行了表面改性;将β-环糊精进行酰氯化,通过酰胺化反应使之接枝到二氧化硅上得到环糊精吸附剂(SiO2-CD),结果表明磺酰化β-环糊精的产率约为25%。通过红外对所制备产物进行了物理化学表征,分析表明,所制备的SiO2微粒基本为单分散性的,偶联剂与二氧化硅之间发生了化学接枝。

In this test,nanosize silica were prepared with tetraethoxysilane(TEOS) as precursor,water and ethanol as cosolution and ammonium hydroxide as catalyze via hydrolysis and condensation reaction.First,monodisperse silica particles was synthesized by hydrolysis and condensation reaction of tetre ethoxysilane(TEOS) in ethanol system.The surface modification of produced nanosize silica was performed by silica coupling agent,γ-Aminopropyltriethoxysilica(APS),which improved the compatibility between nanosize silica and organic phase;the synthesis of mono-tosyl-β-cyclodextrin(Ots-β-CD) and its attachment to the surface of silica was studied.The yield of mono-tosyl-β-cyclodextrin was 25%.The resulting material was characterized by IR spectroscopy.The results showed that the Ots-β-CD was chemically grafted onto silica particles.