物理化学学报 >> 2002, Vol. 18 >> Issue (07): 661-664.doi: 10.3866/PKU.WHXB20020720

研究简报 上一篇    下一篇

微乳剂低温稳定性的研究

陈福良;王仪;郑斐能;梁文平   

  1. 中国农业科学院植物保护研究所,农业部农药化学及农药使用技术重点开放实验室,北京 100094;国家自然科学基金委化学部,北京 100085
  • 收稿日期:2001-11-22 修回日期:2002-02-02 发布日期:2002-07-15
  • 通讯作者: 陈福良 E-mail:cful@263.net

Stability of Agrochemical Microemulsions at Low Temperature

Chen Fu-Liang;Wang Yi;Zheng Fei-Neng;Liang Wen-Ping   

  1. Key Laboratory of Pesticide Chemistry & Application Technology,Ministry of Agriculture, Beijing 100094, Department of Chemical Sciences, NSFC, Beijing  100085
  • Received:2001-11-22 Revised:2002-02-02 Published:2002-07-15
  • Contact: Chen Fu-Liang E-mail:cful@263.net

摘要: 微乳剂低温稳定性是微乳剂制剂质量技术指标之一.其影响因素主要为有机溶剂、表面活性剂、助溶剂和水质.以本文配制的几种农药微乳剂:2.5%吡虫啉、5%烯唑醇和10%哒螨灵微乳剂为研究对象,提出了微乳剂制剂存在有机溶剂中有效成分的稳定溶解突变点和添加表面活性剂应保持亲水性与亲油性平衡的观点.

关键词: 微乳剂, 透明温度区域, 低温稳定性, 表面活性剂, 有机溶剂

Abstract: The stability of microemulsion at low temperature is one of the technical indices of microemulsion quality. The major factors affect the stability at low temperature are organic solvents, surfactants, cosolvent and water quality. In this paper, three formulated microemulsions were studied,namely, 2.5% imidacloprid ME, 5% diniconazole ME and 10% pyridaben ME. It was found that there is at least one break point or organic solvent concentration above which a pesticide could be solved stably in the organic solvent and the stability of the system could be prolonged at low temperature. However, one should keep in mind that minimum use of organic solvent will benefit the environmental protection. The concentration and the balance of the hydrophilicity and lipophilicity of the added surfactants in the system play a key role on the stability of agrochemical microemulsions.

Key words: Microemulsion, Transparencytemperature section, Stability at low temperature, Organic solvent, Surfactant