以苄基淀粉醚与烷基多糖苷复配为乳化剂,油酸甲酯为溶剂,采用浓缩乳化法制备了高度稳定的10％氰氟草酯水乳剂.分析了苄基淀粉醚的红外和紫外特征图谱.采用正交试验设计,通过测定乳滴粒径分布,结合乳液外观,研究了乳化方法、预处理液中苄基淀粉醚与烷基多糖苷质量分数、转速和剪切时间等工艺条件对乳液稳定性的影响.结果表明,苄基淀粉醚与原淀粉相比,在红外、紫外光照射下出现了苯甲基的特征吸收峰.以苄基淀粉醚与烷基多糖苷质量比3∶2复配为乳化剂、质量分数9％油酸甲酯为溶剂制备的10％氰氟草酯水乳剂,乳滴平均粒径在1.02 μm左右,且经(54±2)℃密封14 d加速试验和常温储存6个月后,平均粒径仅增长0.1 ～0.6 μm,析水率为2.7％,均优于用常规乳化剂和溶剂制备的10％氰氟草酯水乳剂.因此,苄基淀粉醚与烷基多糖苷以及油酸甲酯可作为备选乳化剂和溶剂,用于环境相容性好的农药剂型加工.
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