Studies on the Effect of Different Coherer Counter-ions on Forming Rule and Stability of Cyhalothrin Microemulsion

Chem. J. Chinese Universities

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Studies on the Effect of Different Coherer Counter-ions on Forming Rule and Stability of Cyhalothrin Microemulsion

LIU Yu, LU Fu-Sui*, CHEN Tian-Tian, GAO Cui-Li, ZHU Heng-Ying, ZHAO Hui

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

Received:2006-09-08 Revised:1900-01-01 Online:2007-05-10 Published:2007-05-10
Contact: LU Fu-Sui

Abstract

Abstract: The differences of electric mechanism, phase behavior and high temperature stability of cyhalothrin drug-loading microemulsion were investigated when the dodecyl benzenesulfonic salts(DBS^-) combined with five coherer counter-ions and polyoxyethylene styrenyl ether were mixed at the same molar ratio. The results show that K⁺ and Na⁺ were propitious to the formation of O/W microemulsion because DBSK and DBSNa had the strong water-solubility, and the hydrated radius of K⁺ and Na⁺ were small,which induced big bingding degrees of the counter-ions with the hydronium garret group. The O/W microemulsion could also form when the counter-ion was Li⁺, but it was worse than K⁺ and Na⁺. Ca²⁺ and Mg²⁺ dodecyl benzenesulfonic salts are lipophilic surfactants, and thus were not propitious to the formation of O/W microemulsion.

Key words: Counter-ion, Cyhalothrin, Microemulsion, Stability

CLC Number:

O648

TrendMD:

LIU Yu, LU Fu-Sui*, CHEN Tian-Tian, GAO Cui-Li, ZHU Heng-Ying, ZHAO Hui. Studies on the Effect of Different Coherer Counter-ions on Forming Rule and Stability of Cyhalothrin Microemulsion[J]. Chem. J. Chinese Universities, doi: .

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Studies on the Effect of Different Coherer Counter-ions on Forming Rule and Stability of Cyhalothrin Microemulsion

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