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Citation: LIU Yu, LU Fu-Sui, CHEN Tian-Tian, LIU Yue, GAO Cui-Li. Effects of Solvent Polarity on Phase Behavior and Stability of Cyhalothrin Microemulsion[J]. Chinese Journal of Applied Chemistry, ;2008, 25(1): 73-76. shu

Effects of Solvent Polarity on Phase Behavior and Stability of Cyhalothrin Microemulsion

1.
College of Chemistry and Materials Science, Shandong Agricultural University, Tai'an 271018

Corresponding author: LU Fu-Sui,
Received Date: 12 February 2007
Available Online: 5 May 2007
Fund Project: 山东省自然科学基金资助项目(Y2003B01) (Y2003B01)

Pseudo ternary phase diagrams of Cyhalothrin microemulsion with four different solvents were plotted based on electric conductivity measurements.The solubilization positions in the micelle of the Cyhalothrin microemulsions with four different solvents were tested by fluorescent using pyrene as a probe.The results showed that O/W Cyhalothrin microemulsions were easier to form in solvents of low polarity than in solvents of high polarity resulting in bigger O/W area in the pseudo ternary phase diagram.In the solvents of lower polarity I₁/I₃ was smaller,indicating that the Cyhalothrin molecules were closer to the micelle core and less accessible to water,and the raw pesticide was less likely to decompose,and vice versa.The results were proved by measuring the high temperature decomposition rates.
- cyhalothrin,
- microemulsion,
- polarity,
- fluorescence probe
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