El-Sisi., A., Khattab, A., El-Essawy, F., El-Moslhey, M. (2006). PREPARATION OF SOME SURFACE ACTIVE AGENTS AND DETERMINATION OF ITS PHYSICO CHEMICAL PROPERTIES. Journal of Plant Protection and Pathology, 31(9), 6019-6027. doi: 10.21608/jppp.2006.235246
A. G. El-Sisi.; A. F. Khattab; F. A. El-Essawy; M. H. El-Moslhey. "PREPARATION OF SOME SURFACE ACTIVE AGENTS AND DETERMINATION OF ITS PHYSICO CHEMICAL PROPERTIES". Journal of Plant Protection and Pathology, 31, 9, 2006, 6019-6027. doi: 10.21608/jppp.2006.235246
El-Sisi., A., Khattab, A., El-Essawy, F., El-Moslhey, M. (2006). 'PREPARATION OF SOME SURFACE ACTIVE AGENTS AND DETERMINATION OF ITS PHYSICO CHEMICAL PROPERTIES', Journal of Plant Protection and Pathology, 31(9), pp. 6019-6027. doi: 10.21608/jppp.2006.235246
El-Sisi., A., Khattab, A., El-Essawy, F., El-Moslhey, M. PREPARATION OF SOME SURFACE ACTIVE AGENTS AND DETERMINATION OF ITS PHYSICO CHEMICAL PROPERTIES. Journal of Plant Protection and Pathology, 2006; 31(9): 6019-6027. doi: 10.21608/jppp.2006.235246
PREPARATION OF SOME SURFACE ACTIVE AGENTS AND DETERMINATION OF ITS PHYSICO CHEMICAL PROPERTIES
Two type of surface active agents anionic and nonionic were prepared from
locally raw materials: Fatty acids (Iauric and palmitic) reacted with poly ethylene glycol
(PEG) 400. 600 in case of nonionic surfactants preparation and fatty acids reacted
with potassium hydroxide and calcium oxide in case of anionic surfactants
preparation. Locally prepared nonionic surfactants were identified using IR and
Massspectroscopy. Physico-chemical properties were assessed such as HLB, critical
micelle concentration CMC. free acidity or alkalinity and solubility in different solvents
to give prediction of the best use in pesticide formulation. Results obtained indicated
that nonionic surfactants PEG 600 ML were miscible in water while. the other nonionic
surfactants gave emulsion in water. and showed different solubility in xylene and
acetone. 0n the other hand divalent salts (calcium palmitate and Iaurate) were
insoluble in water or any solvents, therefore it is unsuitable to use in formulation .
while, mono valent (potassium Iaurate and potassium palmitate) were soluble in
water. Also the results showed that locally prepared surfactants decreased the
surface tension of water , nonionic surfactants PEG 400 ML was the most in
decreasing the surface tension followed by PEG 600 ML. on the other hand pt-laurate
(ionic surfactant) decreased the surface tension to 29.1 dynelcm, this finding indicated
that these surfactants could be used as wetting and spreading agents. Also the result
indicated that Iaurate esters have HLB 10-12, palmitate esters have HLB 6-8, ionic
surfactants (pt-Iaurate and pt-palmitate) have HLB 12-18 . therefore they were
suitable to use as suspending . wetting and spreading agents.
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