第 45 卷第 2 期Vol. 45 No. 2
2015 年 4 月Apr 2015

所属栏目:农药及中间体

呋虫胺微囊的制备及性能表征
任 璐1,2,宋思思1,2,李晓刚1,2* (1. 湖南农业大学 植物保护学院,湖南 长沙 410128;2. 湖南省生物农药与制剂加工工程技术研究中心,湖南 长沙 410128)
摘 要:以壳聚糖和DL-丙交酯合成的两亲性共聚物CS-co-PLA为囊材,利用双乳法制备了呋虫胺微囊。分别考察了芯材质量比、PVA浓度以及外水相体积对微囊粒径和包封率的影响,并研究了载药微囊的释放行为。结果表明:双乳法制备的呋虫胺微囊粒径约1.23~3.34 μm,分布较为均匀;具有较高的包封率,并具有良好的缓释性能,其环境友好,持效期明显延长,适用于害虫的防治。
关键词:CS-co-PLA;呋虫胺;双乳法;微囊;缓释
中图分类号:TQ450.6+8  文献标识码:A  文章编号:1009-9212(2015)02-0016-04
The Preparation and Performance of Dinotefuran Microcapsules
REN Lu1,2, SONG Si-si1,2, LI Xiao-gang1,2 (1. College of Plant Protection, Hunan Agricultural University, Changsha 410128, China; 2. Hunan Provincial Engineering & Technology Research Center for Bio-pesticide and Formulating Processing, Changsha 410128, China)
Abstract:The microcapsulated dinotefuran was prepared by double emulsion method using chitosan-lactide polymer(CS-co-PLA)as the coating material which was prepared from chitosan and lactide. The effects of the experimental parameters including the mass ratio of m(dinotefuran)to m(CS-co-PLA), volume of external phase and poly(vinyl alcohol)concentration on the size of microcapsules, the encapsulation efficiency(EE), and the sustained release characteristics of dinotefuran microcapsules were also explored. The experimental results showed that microcapsule particles had a mean diameter of 1.23~3.34 μm; Dinotefuran microcapsules prepared by double emulsion had high encapsulation efficiency and the well-controlled release behavior. It was environmentally friendly and suitable for the pest control.
Key words:CS-co-PLA; dinotefuran; double emulsion; microcapsules; sustained release
基金项目:湖南省自然科学基金(13JJ5023),中国烟草总公司科技重点项目(110201302014)。
作者简介:任 璐(1989-),女,湖南岳阳人,硕士研究生,主要从事农药微胶囊制剂及其加工研究(E-mail:renlu0521@163.com)。
联 系 人:李晓刚,男,湖南岳阳人,教授,主要从事农药低毒化应用技术研究(E-mail:lxgang@aliyun.com)。
收稿日期:2015-03-17