Surfactants in Solution
Volume 11
Page
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Article
The role of surface tension on the residual water content of fabrics
Cotton has been shown to hold up to 80% of its initial weight in water due to strong capillary forces after washing. According to the LaPlace equation for capillary rise, the rise is proportional to the surfac...
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Article
Kinetics of the self-assembly of gemini surfactants
A stopped-flow technique combined with pulsed-field-gradient spin-echo nuclear magnetic resonance (NMR) measurements was used to study the kinetics of exchange, size, and shapes in micellar systems of cationic...
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Chapter and Conference Paper
New Horizons in Purification of Liquids: Novel Colloidal and Interfacial Strategies to Remove Hazardous Molecules, Viruses and Other Microorganisms from Water or Blood
Water is continually moving around, through, and above the earth as water vapor, liquid water, and ice. In fact, water is continually changing its form. The Earth is essentially a “closed system”, like a terra...
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Article
On the measurement of critical micelle concentrations of pure and technical-grade nonionic surfactants
The critical micelle concentrations (CMC) of nine commercial nonionic surfactants (Tween 20, 22, 40, 60, and 80; Triton X-100; Brij 35, 58, and 78) and two pure nonionics [C12(EO)5 and C12(EO)8] were determined b...
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Article
Importance of micellar relaxation time on detergent properties
As we enter the new millennium, manufacturers of laundry detergents would like to provide new products for the twenty-first century. With the goal of achieving new and better performance characteristics, desig...
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Article
A comparison between lipase-catalyzed esterification of oleic acid with glycerol in monolayer and microemulsion systems
Lipase-catalyzed synthesis-esterification of oleic acid with glycerol-was carried out in L2 microemulsions and in monolayers. The microemulsions were based on isooctane as a nonpolar component and various wate...
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Article
Synthesis of mono- and diglycerides in water-in-oil microemulsions
Enzyme-catalyzed esterification was carried out in single-phase, oil-continuous microemulsions. The lipozyme was solubilized, along with glycerol and water, in the aqueous core of water/diethylhexyl sodium sul...
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Article
The molecular mechanism for destabilization of foams by organic ions
The effect of tetraalkylammonium ions on the destabilization of foam has been studied by measuring the half-life of foam (τ1/2), area/molecule at the air/water interface, surface viscosity and critical micelle co...
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Article
The effect of micellar lifetime on the rate of solubilization and detergency in sodium dodecyl sulfate solutions
The slow relaxation time (τ2) of sodium dodecyl sulfate (SDS) micelles, measured by the pressure-jump technique, was maximum at 200 mM concentration at 25°C, indicating that the most stable micelles are formed at...
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Book
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Chapter
Reactions in Micelles, Monolayers, and Liquid Crystals
Measurement of product ratios from dediazoniation reactions in acidic aqueous solutions of cationic micelles provides a new method for determining the relative interfacial quantities of weak nucleophiles at th...
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Chapter
Surfactants in Food, Pharmaceutical, and Cosmetic Industries
The fat phase of cow’s milk consists mainly of triglyceride globules surrounded by phospholipid bilayer membrane binding integral proteins. In homogenized milk and foods incorporating dairy products, the lipid...
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Chapter
Thermodynamics and Kinetics of Micellization, including Solubilization
Recent measurements carried out using surfactant selective electrodes constructed in this laboratory have shown that for aqueous solutions of anionic and cationic surfactants with a small amount of added salt ...
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Chapter
Surfactant Association: Recent Theoretical and Experimental Developments
A theoretical model describing the association of ionic surfactants into rod-shaped micelles is combined with an approximate formula for the viscosity increase induced by rod-shaped aggregates. It is shown tha...
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Chapter
Microemulsions: Phase Diagrams, Structure and Applications (including Reactions in Microemulsions)
AB block copolymers of poly (2-vinylpyridine)/polystyrene and poly (2-vinylpyridine)/poly (dimethylsiloxane) have been prepared and characterized. The poly (2-vinylpyridine) blocks were oxidized to obtain amph...
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Chapter
Industrial Applications of Surfactants, and Surfactants in Emerging Technologies
Surface sizing generally refers to the process of imparting paper resistance to wetting by liquid through the surface modification of paper. In this study, the interfacial phenomena in surface sizing were exam...
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Chapter
Adjuvant Effect of Surfactants on Herbicidal Formulations
The adjuvant effect of several surfactants on herbicidal sprays was examined by comparing the surface properties of the formulations on solid surfaces such as Teflon, pyrexglass and orange leaf. Contact angle ...
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Article
Effect of salinity and alcohol partitioning on phase behavior and oil displacement efficiency in surfactant-polymer flooding
The equivalent alkane carbon number (EACN) of a crude oil, namely Ankleshwar crude, is successfully modeled by a mixture of pure alkanes. The EACN of the crude oil is found to be 9.3, and an appropriate mixtur...
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Chapter
Formulation and Properties of an Alcohol-Free, Pharmaceutical Microemulsion System
An alcohol-free, water-in-oil microemulsion was formulated using two high molecular weight, pharmaceutically acceptable surfactants: sorbitan monolaurate (Arlacel 20 or Span 20) and sodium dioctyl sulfosuccina...
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Article
Solubilization and fluorescence behavior of petroleum sulfonate containing microemulsions
The effects of various oils and alcohols on the brine solubilization and fluorescence behavior of oil-external microemulsions were investigated. At a critical electrolyte concentration, referred to as optimal ...
