Abstract: An inverse microemulsion was prepared with distilled water as water phase，n-hexane as organic phase，and Span 60 mixed with Tween 60 as emulsifying agent and n-pentanol as co-emulsifying agent. The dextrin nanosphere was then prepared with the inverse microemulsion by using Na3P3O9 as cross-linking agent and dextrin as raw material. The results showed that the emulsifying agent was in positive correlation to water solubility, whereas n-pentanol co-emulsifying agent was in negative correlation to water solubility in the system of inverse microemulsion. The cross linking reaction taking place successfully was confirmed by infra-red spectrum analysis. A uniform dextrin nanosphere with a diameter of 500—600 nm was measured with scanning electronic microscope.

摘要： 以正己烷为油相，去离子水为水相，Span 60和Tween 60为表面活性剂，正戊醇为助表面活性剂配制微乳液，对影响微乳液特性的各因素做了分析。并以糊精为原料，三偏磷酸钠为交联剂，制备糊精纳米微球。结果表明，在微乳液体系中，表面活性剂的量与体系溶水能力在一定范围内正向相关，而助表面活性剂正戊醇对溶水能力则具有逆向作用。红外光谱测试证实糊精与三偏磷酸钠发生交联，经扫描电镜观察，糊精微粒纳米形态均一，粒径在500～600 nm之间。