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稀释倍数对虱螨脲乳液性能的影响规律及作用机制
引用本文:李子璐,张晨辉,高玉霞,马悦,郭勇飞,赵克非,杜凤沛.稀释倍数对虱螨脲乳液性能的影响规律及作用机制[J].农药学学报,2020,22(2):243-248.
作者姓名:李子璐  张晨辉  高玉霞  马悦  郭勇飞  赵克非  杜凤沛
作者单位:中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193;中国农业大学理学院应用化学系,北京 100193
基金项目:国家重点研发计划 (2017YFD0200302)
摘    要:农药制剂在使用过程中须按照不同的施药方式进行相应的稀释,而不同稀释倍数对药液性质有较大影响。本文以虱螨脲乳油为研究对象,探讨稀释倍数对乳液稳定性和润湿性能的影响规律及作用机制。结果表明:随着稀释倍数的增大,乳液粒径减小,粒径分布更均匀;同时,由于乳液粒径减小,液滴布朗运动加剧,沉降速率逐渐降低,离心稳定性逐渐增强;但是,助剂浓度的降低导致乳液表面张力逐渐增大,在疏水石蜡板上的接触角逐渐增大,润湿性能逐渐变差。该研究结果可为不同施药方式下农药的规范使用提供依据,对提高农药利用率具有重要的指导意义。

关 键 词:稀释倍数  虱螨脲  农药乳液  乳液稳定性  润湿性能  农药利用率
收稿时间:2019-11-18

Regularity and mechanism of lufenuron emulsion properties influenced by dilution ratio
LI Zilu,ZHANG Chenhui,GAO Yuxia,MA Yue,GUO Yongfei,ZHAO Kefei,DU Fengpei.Regularity and mechanism of lufenuron emulsion properties influenced by dilution ratio[J].Chinese Journal of Pesticide Science,2020,22(2):243-248.
Authors:LI Zilu  ZHANG Chenhui  GAO Yuxia  MA Yue  GUO Yongfei  ZHAO Kefei  DU Fengpei
Institution:Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
Abstract:In the process of pesticide application, pesticide formulation needs to be diluted according to the different application methods and the liquid properties are influenced by the dilution ratio. In this work, lufenuron EC was selected as the object. The effects of dilution ratio on the mechanism of emulsion properties and the wetting ability were studied. The results demonstrated that with the increase of the dilution ratio, the particle size of the emulsion decreased gradually and the particle size distribution became better. Besides, the particle size of the emulsion decreased and the Brownian motion of particle enhanced, so the sedimentation rate fell down and the centrifugal stability improved gradually. However, because the concentration of adjuvant decreases, the surface tension of emulsion increased and the contact angle of droplets on the hydrophobic paraffin wax surface increased gradually and the wetting properties became worse. This research has provided basis for pesticide normative application based on different application methods, which guides the improvement of the utilizing efficiency of pesticide.
Keywords:dilution ratio  lufenuron  pesticide emulsion  emulsion stability  wettability  pesticide utilization efficiency
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