摘要
目的：探讨以脲醛树脂为壁材，以氯氰菊酯为囊芯物制备聚脲微胶囊的工艺条件。方法：采用原位聚合法制备聚脲微胶囊，对比不同反应时间、搅拌速度、反应温度、催化剂对微囊化的影响。结果：通过实验得知，在反应温度60-70℃，搅拌速度3 000 r/min，以NH4Cl缓慢调节pH值为2.0左右，酸化时间2 h的反应条件下，可获得大小及分布理想的微囊颗粒。结论：氯氰菊酯聚脲微胶囊技术成功实现了农药由液态向固态的转变，使得药物的配制和施用更加方便、快捷，并为有害生物防治产品的多样化提供了可能。
Objedtive： To explore the technological conditions about preparing for microcapsules with an urea- formaldehyde resin as wall and with cypermethrin as core material. Methods： Microcapsules were prepared by an in situ condensation polymerization reaction, and severa reaction parameters were investigated, including acidification time, agitating rate, reaction temperature, activator. Results：Optimum reaction conditions were as following： reaction temperature 60-70 ℃, agitating rate 3 000 r/min, acidification time 2 h with NH4Cl as catalyst adjusting pH to the endpoint 2.0 slowly. Under these conditions, microcapsules granule with uniform diameter and good distribution were prepared. Conclusion：Solidifying of liquid pesticide was realized by the microcapsulation technology of cypermethrin and offered possibilities for productions diversification of vector control.
出处
《海军医学杂志》
2007年第2期132-134,共3页
Journal of Navy Medicine
关键词
氯氰菊酯
微胶囊
原位聚合
脲醛树脂
cypermethrin
microcapsule
in situ condensation polymerization
urea-formaldehyde
