摘要
[目的]制备以改性的β-环糊精为载体的七氟菊酯微胶囊。[方法]以聚乙烯醇-1788为乳化分散剂，运用溶剂挥发法制备微胶囊，使用激光粒度分析仪、光学显微镜、扫描电镜对微胶囊进行形貌表征，用紫外分光光度计研究微胶囊的缓释行为。[结果]β-环糊精与PBS按4：3的比例共混改性后制备的载体微胶囊的包封率为87．08％、载药量为57．81％，平均粒径为10μm，缓释期为25-27d。[结论]改性后的β-环糊精载体微胶囊具有较好的结构形貌，载药量和包封率均比脲醛树脂载体微胶囊高，且缓释性更好。
[Aims] The microcapsules containing tefluthrin were prepared with modified β-cyclodextrin. [Methods]The microcapsules were prepared via emulsion solvent evaporation process, and PVA-1788 was used as emulsifier. The modified β-cyclodextrin microcapsules were characterized through automatic laser granularity analyzer, optical microscope, scanning electron microscope. The released properties were studied via ultraviolet spectrophotometer. [Results] The encapsulation rates of microcapsules made by β-cyclodextrin blended with PBS according to the proportion of 4 to 3 was 87.08%, the loading rates was 57.81%, the average diameters was 10 μm, the release dates was 25-27 d. [Conclusion] The microeapsules of modified β-cyclodextrin had better surface topography, encapsulation rates and loading rates than the microcapsules of urea resin. What＇s more, its release property was longer than other proportion.
出处
《农药》
CAS
CSCD
北大核心
2014年第5期328-330,336,共4页
Agrochemicals
基金
湖南省高等学校科学研究重点项目(11A053)
湖南省自然科学基金(13JJ5023)
