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探索了超临界二氧化碳介质中甲基-β-环糊精和两种线型聚丙二醇间的穿合(threadinginclusion);并和相同温度下空气中的固态包合反应进行了比较。在无溶剂状态下,原处于无定形态的甲基-β-环糊精可与聚丙二醇链作用形成具有圆筒状结构的结晶态包合物,引入适量二氧化碳可明显增大包合反应的程度;将聚丙二醇链两端的羟基换为丙烯酸酯基可使反应进一步加强。
We explored the threadinginclusion between methyl-β-cyclodextrin and two linear polypropylene glycols in supercritical carbon dioxide media and compared with the solid inclusion reaction in air at the same temperature. Under solvent-free condition, methyl-β-cyclodextrin originally in amorphous state can form a crystalline inclusion compound with a cylindrical structure through the action of polypropylene glycol chain. The incorporation of appropriate amount of carbon dioxide can significantly increase the inclusion reaction Extent; Polypropylene glycol chain at both ends of the hydroxyl group can be replaced by the acrylate reaction can be further strengthened.