Fast microencapsulation of chlorpyrifos and bioassay.
Fast microencapsulation of chlorpyrifos and bioassay.
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DOI：
10.1584/jpestics.g09-43
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发表时间：
2010-08
影响因子：
2.4
通讯作者：
Ling Zhu;Zhenghui Wang;Shuting Zhang;X. Long
中科院分区：
文献类型：
--
作者：
Ling Zhu;Zhenghui Wang;Shuting Zhang;X. Long
这项工作的目的是探索以环境友好的方式有效使用农药的可能性。本文报道了毒死蜱微胶囊的制备、表征及生物活性测定。以异佛尔酮二异氰酸酯和三乙烯四胺的三聚体为壁材，十二烷基硫酸钠和黄原胶为稳定剂，在3000 rpm的乳化速度下乳化12 min，采用快速界面聚合法在室温下制备了初始包封率为94.7%的毒死蜱微胶囊，微胶囊粒径为2-7 μm。基于所制备的微胶囊的制剂在中性介质中稳定，并且在酸性和碱性介质中释放毒死蜱。对斜纹夜蛾3龄幼虫的生物测定结果表明，微胶囊制剂比常规乳剂制剂具有更好的持效性。本文提出的思路和方法在农药工业中具有潜在的应用价值。
The objective of this work was to explore the possible efficient application of pesticides in an environmentally friendly way. The present paper reports the preparation, characterization and bioassay of chlorpyrifos-containing microcapsules. With trimer of isophorone diisocyanate and triethylenetetramine as wall-forming materials, sodium dodecylsulfate and xanthan gum as stabilizers, and an emulsifying speed of 3000 rpm for 12 min, chlorpyrifos-containing microcapsules, with a diameter ranging 2-7 μm and an initial encapsulation rate of 94.7%, were prepared by fast interfacial polymerization at room temperature. Formulations based on the prepared microcapsules are stable in neutral medium and release chlorpyrifos in both acidic and alkaline media. The results of bioassay against 3 rd -instar Spodoptera litura larvae showed that microcapsule formulations had more sustainable efficacy than that of conventional emulsion formulations. The idea and approach presented in this work have potential application in the pesticide industry.