Method for analysis of the composition of acid soaps by electrolytic conductivity measurements

Kralchevsky, Peter A.; Boneva, Mariana P.; Danov, Krassimir D.; Ananthapadmanabhan, K.P.; Lips, Alex

doi:10.1016/j.jcis.2008.08.006

Cited by 14 publications

(6 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hamilton investigated the phase diagram of the binary 1:1 potassium hydrogen oleate-water and the phase structure of the mesophases by using X-ray diffractometry both above and below T c 15 . Kralchevsky also confirmed the coexistence of a micellar aqueous solution and 1:1 acid soap crystals below T c in the potassium myristate-water system through conductivity and surface tension measurements 16,17 .…”

Section: Introductionmentioning

confidence: 79%

Stability Conditions and Mechanism of Cream Soaps: Role of Glycerol

Sagitani

2014

J. Oleo Sci.

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 79%

Stability Conditions and Mechanism of Cream Soaps: Role of Glycerol

Sagitani

2014

J. Oleo Sci.

View full text Add to dashboard Cite

“…(2) is a semi-empirical expression for the Kohlrausch correction at temperature T = 25°C [25,26]; j 0 accounts for the background concentration of other ions present in the water and is determined as an adjustable parameter from the data fit with Eqs. (1) and (2).…”

Section: Cmc Of Sme Determined By Conductivity Measurementsmentioning

confidence: 99%

Sulfonated methyl esters of fatty acids in aqueous solutions: Interfacial and micellar properties

Danov

Stanimirova

Kralchevsky

et al. 2015

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

“…On the other side, the alkycarboxylate (soap) solutions are characterized with very high surface modulus and, from this viewpoint, they complement the synthetic surfactants very well. 23,68 However, soap solutions typically contain solid crystallites (precipitates) of complex composition, 23,69,70 which may create problems in the experiments and data interpretation. These crystallites could be removed from the foaming solution by centrifugation or filtration, however, they spontaneously reappear for relatively short period of time (minutes or hours).…”

Section: Control Of Surface Mobility By Choosing Appropriate Cosurfac...mentioning

confidence: 99%

The role of surfactant type and bubble surface mobility in foam rheology

et al. 2009

Self Cite

View full text Add to dashboard Cite

This paper is an overview of our recent understanding of the effects of surfactant type and bubble surface mobility on foam rheological properties. The focus is on the viscous friction between bubbles in steadily sheared foams, as well as between bubbles and confining solid wall. Large set of experimental results is reviewed to demonstrate that two qualitatively different classes of surfactants can be clearly distinguished. The first class is represented by the typical synthetic surfactants (such as sodium dodecylsulfate) which are characterised with low surface modulus and fast relaxation of the surface tension after a rapid change of surface area. In contrast, the second class of surfactants exhibits high surface modulus and relatively slow relaxation of the surface tension. Typical examples for this class are the sodium and potassium salts of fatty acids (alkylcarboxylic acids), such as lauric and myristic acids. With respect to foam rheology, the second class of surfactants leads to significantly higher viscous stress and to different scaling laws of the shear stress vs. shear rate in flowing foams. The reasons for these differences are discussed from the viewpoint of the mechanisms of viscous dissipation of energy in sheared foams and the respective theoretical models. The process of bubble breakup in sheared foams (determining the final bubble-size distribution after foam shearing) is also discussed, because the experimental results and their analysis show that this phenomenon is controlled by foam rheological properties.

show abstract

Method for analysis of the composition of acid soaps by electrolytic conductivity measurements

Cited by 14 publications

References 27 publications

Stability Conditions and Mechanism of Cream Soaps: Role of Glycerol

Stability Conditions and Mechanism of Cream Soaps: Role of Glycerol

Sulfonated methyl esters of fatty acids in aqueous solutions: Interfacial and micellar properties

The role of surfactant type and bubble surface mobility in foam rheology

Contact Info

Product

Resources

About