摘要
以电导率为基础绘制了4种不同溶剂的高效氯氟氰菊酯载药微乳液拟三元相图,以芘为荧光探针间接测定了不同溶剂溶解高效氯氟氰菊酯后在胶团中的增溶位置。结果表明,极性弱的溶剂更易于形成O/W型高效氯氟氰菊酯载药微乳液,在拟三元相图中可形成较大面积的O/W型微乳液区域。极性较强的溶剂,所测得探针的I1/I3值较大,说明该溶剂增溶在胶团中时占据向外的空间,有利于原药与渗透水的接触而易于水解;而极性较弱的溶剂,所测得探针的I1/I3值较小,说明其增溶在胶团中时占据靠近胶束内核的空间,不利于原药与渗透水的接触,从而有效地减少了原药的水解,所形成的载药微乳液更稳定。
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.
出处
《应用化学》
CAS
CSCD
北大核心
2008年第1期73-76,共4页
Chinese Journal of Applied Chemistry
基金
山东省自然科学基金资助项目(Y2003B01)
