摘要/Abstract

氨基粘土（Aminoclay，AC）是一种具有片层结构的硅酸盐材料，由于其在水中具有高分散性的特点，因此被广泛应用于构筑智能杂化水凝胶.利用静电相互作用，将带负电的7-[6-脱氧-6-（2-乙磺酸）]-β-环糊精（磺化环糊精，SCD）与氨基粘土非共价结合，构筑了一种新型的杂化水凝胶，并利用X射线衍射（XRD）、扫描式电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、Zeta电势、流变测试等对所构筑的凝胶进行了结构表征.进而发现SCD-AC凝胶在水相中展现出对I₃^-离子的高效吸附特性，并且在有机相中能够吸附I₂分子.
关键词: 超分子水凝胶, 环糊精, 氨基粘土, 碘, 吸附
Aminoclay (AC), as a kind of layered silicates with positive charges, shows high dispersity in water and has been widely applied in the fabrication of intelligent hybrid hydrogel. Herein, heptakis-[6-deoxy-6-(2-sulfanylethanesulfonic acid)]-β-cyclodextrin (SCD), a kind of negatively charged cyclodextrin, was employed to construct the supramolecular hydrogel with aminoclay through the static electronic interactions, and the resultant SCD-AC hydrogel was fully characterized by means of X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), zeta potential, rheological test, etc. Significantly, the SCD-AC hydrogel can efficiently absorb not only I₃^- ion in aqueous solution but also I₂ molecule in organic solvent, giving a high adsorption capacity up to 90% with 10 min.
Key words: supramolecular hydrogel, cyclodextrin, aminoclay, iodine, adsorption


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