A non-aqueous microemulsion system of ethylene glycol, sodium dodecyl sulfate, toluene, and decanol

1990 ◽  
Vol 268 (8) ◽  
pp. 755-759 ◽  
Author(s):  
S. E. Friberg ◽  
W. M. Sun
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Ethylene Glycol ◽  
Sodium Dodecyl ◽  
Microemulsion System ◽  
Dodecyl Sulfate

Optimization of Formulations of 1% Abamectin Microcapsule Suspensions with Properties of Biochemical Materials

2013 ◽  
Vol 643 ◽  
pp. 17-20
Author(s):  
Ke Feng Xiao ◽  
Zhi Hui Hao ◽  
Lei Lei Wang ◽  
Xiu Guang Feng
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Ethylene Glycol ◽  
Cold Storage ◽  
Industrial Production ◽  
Xanthan Gum ◽  
Sodium Dodecyl ◽  
Experimental Basis ◽  
Orthogonal Experiments ◽  
Dodecyl Sulfate

By orthogonal experiments, optimal formulation of 1% abamectin microcapsule suspensions was determined as follow: the proportion of abamectin microcapsule is 1%, NNO 5.0%, sodium dodecyl sulfate 3.0%, xanthan gum 0.3%, ethylene glycol 3%, and the remainder is water. The indicators of the formulation are all excellent: good dispersibility, suspension rate greater than 90%, cold storage and hot storage syneresis rates under 5%. The properties of biochemical materials were used in optimization. The optimal formulation provides an experimental basis for industrial production of abamectin microcapsule suspensions.

Thermodynamic properties of micellization of sodium dodecyl sulfate in binary mixtures of ethylene glycol with water

1996 ◽  
Vol 74 (9) ◽  
pp. 1616-1625 ◽  
Author(s):  
Kim Gracie ◽  
Dale Turner ◽  
R. Palepu
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Ethylene Glycol ◽  
Ultrasonic Velocity ◽  
Sodium Dodecyl ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Aqueous Mixtures ◽  
Degree Of Dissociation ◽  
Aggregation Numbers ◽  
Dodecyl Sulfate

Micellar properties of sodium dodecyl sulfate (SDS) in aqueous mixtures of ethylene glycol (EG) were determined using techniques such as conductivity, density, EMF, surface tension, viscosity, ultrasonic velocity, and spectroscopy (fluorescence). The effective degree of disssociation of micelles (α) was determined using three different methods. Thermodynamics of micellization were obtained from the temperature dependence of critical micelle concentrations (cmc) values. The difference in Gibbs energies of micellization [Formula: see text] of SDS, between water and mixed solvent systems, was calculated to evaluate the influence of cosolvent on the micellization process. Surfactant aggregation numbers (Ns) obtained from static fluorescence quenching methods indicated a decrease in the aggregation numbers with increasing concentration of ethylene glycol in the binary solvent mixtures. In addition, the micropolarity of the micellar interior was determined from the pyreneI1/I3 ratios. These values were consistent with a decrease in the micropolarity surrounding the probe molecule as the EG content in the solvent mixture was increased. Key words: thermodynamics, micellization, aggregation numbers, ultrasonic velocity, degree of dissociation.

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