以氯仿为共溶剂,用流延成膜法制备了不同酰基侧链O-酰化壳寡糖/聚乳酸（OCS/PLLA）共混膜,用FTIR、WAXD、DSC和TG等方法表征了共混膜中的氢键作用。结果表明,OCS/PLLA共混膜组分间存在较强的氢键相互作用,主要发生在O-酰化壳寡糖的氨基和聚乳酸的羰基之间;在保证脂溶性的前提下,酰基侧链越短,O-酰化壳寡糖与聚乳酸之间的氢键作用越强,组分间的相容性越好。
Three kinds of O-acylated oligochitosans/poly（L-lactic acid）（OCS/PLLA） blend films were prepared by solution-casting approach using CHCI_3,the hydrogen-bond interaction between OCS and PLLA were characterized by FTIR,WAXD,DSC and TG techniques.The results show that there are strong hydrogen-bond interactions in the OCS/PLLA blend films,and the interactions mainly appeare between the amine group of OCS and the carbonyl group of PLLA.The length of acyl sidechain of oligochitosan affects the hydrogen-bond interaction greatly,and the miscibility of the blend films.The shorter sidechains, the stronger hydrogen-bond interaction,as well as the better compatible of the OCS/PLLA blend films.
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