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采用乳化水加油法,以正丁酸乙酯为溶剂,曲拉通X-100(TX-100)、十二烷基苯磺酸钠(SDBS)为表面活性剂,正丁醇为助表面活性剂,制备水基型氯氰菊酯微乳剂.通过相图法、负染电镜、电导率、表面张力法、动态光散射、表面接触角测定等手段对所制备的氯氰菊酯微乳剂的结构和性质进行了表征,研究了该微乳剂在杨福麦叶面的铺展动力学.结果表明所制备的氯氰菊酯微乳剂为水包油型(O/W),该微乳剂对氯氰菊酯有较好的增溶效应,具有较低的接触角和表面张力,液滴半径在45 nm左右;微乳剂在杨福麦叶面的铺展动力学恰好符合二级动力学方程,速率常数分别为0.1090(°)~(-1)·min(~-1)(20℃)和0.1572(°)~(-1)·min~(-1)(30℃),活化能为27.03 kJ·mol~(-1).
The emulsified water was added to the mixture. Triton X-100 (TX-100) and sodium dodecyl benzene sulfonate (SDBS) , The water-based cypermethrin microemulsion was prepared.The structure and properties of the prepared cypermethrin microemulsion were characterized by means of phase diagram, negative staining, conductivity, surface tension, dynamic light scattering and surface contact angle , The spreading kinetics of the microemulsion on the leaves of Yangfumai were studied.The results showed that the prepared microemulsion was oil-in-water (O / W), which had good solubilization effect on cypermethrin and had The contact angle and surface tension of the droplets were about 45 nm. The spreading kinetics of the microemulsion in Yangfomai leaf surface coincided with the second-order kinetic equation with rate constants of 0.1090 (°) -1 · Min (-1) (20 ℃) and 0.1572 (°) -1 (min -1) (30 ℃) respectively. The activation energy was 27.03 kJ · mol -1.