溶剂极性对高效氯氟氰菊酯微乳液相行为及其稳定性的影响

高效氯氟氰菊酯; 微乳液; 极性;荧光探针

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

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.