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震荡制乳的可行性及NaCl影响水乳剂体系稳定性
引用本文:伍翔,魏方林,魏晓林,朱国念,许丹倩.震荡制乳的可行性及NaCl影响水乳剂体系稳定性[J].农药,2006,45(7):452-455.
作者姓名:伍翔  魏方林  魏晓林  朱国念  许丹倩
作者单位:1. 浙江大学,农药与环境毒理研究所,杭州,310029;湖南农业大学,生物安全科技学院,长沙,410128
2. 湖南农业大学,生物安全科技学院,长沙,410128
3. 浙江工业大学,绿色化学合成技术国家重点实验室培育基地,杭州,310014
摘    要:以40%三唑磷EW为例,对震荡法制备水乳剂的可行性及电解质NaCl影响农药水乳剂体系稳定性的机制进行了研究。结果表明:(1)采用震荡法制乳可对水乳剂配方进行快速筛选;(2)NaCl用量在3%以下时可降低水乳剂分散相粒径,用量过高则会使中位径D50增大;(3)NaCl可使水乳剂分散相与连续相之间的界面张力升高;(4)NaCl用量在3%以下时对界面膜的强度基本无影响,但用量过高会显著降低界面膜的强度;(5)随NaCl用量的增加,Zeta电位升高。

关 键 词:震荡法  界面张力  粒径  界面膜强度  Zeta电位
文章编号:1006-0413(2006)07-0452-04
收稿时间:2005-10-19
修稿时间:2005-10-192005-12-30

Feasibility of vibration induced emulsions and the mechanism of NaCl effects on EW system stability
WU Xiang,WEI Fang-lin,WEI Xiao-lin,ZHU Guo-nian,XU Dan-qian.Feasibility of vibration induced emulsions and the mechanism of NaCl effects on EW system stability[J].Pesticides,2006,45(7):452-455.
Authors:WU Xiang  WEI Fang-lin  WEI Xiao-lin  ZHU Guo-nian  XU Dan-qian
Affiliation:1.Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China; 2.Academy of Bio-Safety and Scientist Technology, Hunan Agricultural University, Changsha 410128, China; 3.State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology, Hangzhou 310014, China
Abstract:Using triazophos 40% EW as an example,the feasibility of preparing vibration induced emulsions was investigated along with the mechanism of the effect of NaCl on stability of a pesticide EW system.Results indicated that: 1) the vibratory method can be used for rapid screening of EW emulsions,2) when NaCl was added at <3%,particle size of the dispersed phase could be reduced,while higher NaCl rates increased the D50 value,3) NaCl increased the interfacial tension between the dispersed and continuous phases,4) NaCl at <3% essentially did not affect the strength of the interfacial membrane,although excessively high rates significantly decreased the strength of the membrane,5) Zeta electrical potential increased as NaCl increased.
Keywords:vibration method  interfacial tension  particle size  membrane tension  Zeta electrical potential
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