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以聚脲为囊壁材料,采用界面聚合法制备了阿维菌素·毒死蜱微囊悬浮剂,并对样品进行了缓释性能的测定。结果表明,采用0203为乳化剂、D-305为分散剂可制得囊型良好、平均粒径为2.967μm,包封率、悬浮率均在95%以上,贮存性能稳定的微囊悬浮剂。释放性能测定表明,该微囊悬浮剂2种成分的释放规律均符合一级动力学方程,分别为Q(阿维)=63.538 26(1-e~(-0.12 71t))(R~2=0.987 5),Q(毒死蜱)=70.956 28(1-e~(-0.146 76t))(R~2=0.985 3),阿维菌素、毒死蜱在60d时的累积释放率分别为67.4%、73.7%,说明该微囊悬浮剂具有良好的缓释性能。
Using polyurea as wall material, avermectin · chlorpyrifos microcapsule suspension was prepared by interfacial polymerization and the sustained release properties of the sample were determined. The results showed that microcapsule suspending agent with good capsule shape, average particle diameter of 2.967μm, encapsulation efficiency and suspension rate of over 95%, and stable storage performance can be obtained by using 0203 as emulsifier and D-305 as dispersant. The release properties of the microcapsules suspension showed that the release of the two components were in accordance with the first-order kinetic equation, which were Q = 63.538 26 (1-e ~ (-0.12 71t)) (R ~ 2 = 0.987 5), Q (chlorpyrifos) = 70.956 28 (1-e ~ (-0.146 76t)) (R ~ 2 = 0.985 3). The cumulative release rates of abamectin and chlorpyrifos at 60d were 67.4% and 73.7 %, Indicating that the microcapsule suspending agent has a good sustained-release properties.