摘要
以脲醛树脂为载体,采用原位聚合法制备了啶虫脒/脲醛树脂微胶囊,通过正交实验考察了单体摩尔比、乳化时间、酸化时间、固化时间等对微胶囊载药率、包封率的影响,并对微胶囊的形貌、释药性能和贮存性能进行了表征。结果表明,当尿素与甲醛摩尔比1.0∶1.8、乳化时间1 h、酸化时间1.0 h、固化时间2.0 h时,所得啶虫脒/脲醛树脂微胶囊形态光滑,粒径分布均匀,包封率高且具有良好的缓释效果和贮存稳定性。
In this study, a series of acetamiprid microcapsules is prepared by iu-situ polymerization with ureaformaldehyde resin as shell materials. The effect of preparation conditions such as the mole ratio of urea and formaldehyde, emulsifying time, acidification time and curing time on the drug loading and encapsulation efficiency are discussed in detail by the orthogonal experiment. The size and distribution, surface morphology, release and storage properties of microcapsules are also studied. The optimum preparation conditions are shown as follows ： 1.0：1.8 of the mole ratio urea and formaldehyde ,60 minutes of emulsifying time, 1 hour of acidification time and 2 hours of curing time. The obtained microcapsules prepared under the above conditions have smooth surface morphology, uniform size, high encapsulation efficiency, excellent release properties and high stability.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第6期48-50,52,共4页
Modern Chemical Industry
关键词
微胶囊
啶虫脒
脲醛树脂
原位聚合
microeapsules
acetamiprid
urea-formaldehyde resin
in-situ polymerization
