聚电解质微胶囊的制备及其对2,4-二氯苯氧乙酸的控制释放  

Preparation of Polyelectrolyte Microcapsule and Its Control-release Properties for 2,4-Dichlorophenoxyacetic Acid

作　　者：刘畅[1] 周超[1] 裴小朋 谭颖[2] 徐昆[2] 王丕新[2] 

机构地区：[1]长春工业大学,长春130000 [2]中国科学院长春应用化学研究所,长春130022

出　　处：《农药》2016年第10期733-735,744,共4页Agrochemicals

基　　金：吉林省科技发展计划项目(20140204083GX;20140204064SF);长春市科技发展计划项目(14KG050);中国科学院科技合作专项资金资助项目(2014SYHZ0021)

摘　　要：[目的]制备缓释型聚电解质微胶囊,解决2,4-二氯苯氧乙酸(2,4-滴)有效成分释放速度快、药效持续时间短的问题。[方法]将除草剂2,4-滴乳液成功地包埋入具有良好机械性能的聚丙烯酸-阳离子淀粉聚电解质微胶囊中,研究不同pH值、温度和盐浓度对2,4-滴释放性能的影响。[结果]聚电解质微胶囊具有良好的机械性能,当pH值为4、温度为15℃、盐浓度为1.5%时,微胶囊对2,4-滴的释放性能最佳。[结论]聚电解质微胶囊对2,4-滴具有良好的控制释放性能。[Aims ] In order to solve the problems of fast release speed and short duration, a novel slow-released polyelectrolyte microcapsule was preparated to encapsulate 2,4-dichlorophenoxyacetic acid（2,4-D）. [Methods ] The2,4-D emulsion was successfully encapsulated in polyacrylic acid/cationic starch polyelectrolyte microcapsule. The effects of p H, temperature and salt concentration on the release of 2,4-D were studied. [Results ] The obtained microcapsule present excellent mechanical properties. The microcapsule exhibited the best slow-released properties when the p H, temperature and salt concentration was 4, 15 ℃ and 1.5%, respectively. [Conclusions] The polyelectrolyte microcapsule present well control-release performance for 2,4-D.

关 键 词：聚电解质微胶囊 阳离子淀粉 聚丙烯酸 2 4-滴乳液 缓释 

分 类 号：TQ450.1[化学工程—农药化工]