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Comportamiento de agregación de noveles surfactantes de par iónico

Authors: Bravo, Belgica; Chávez, Gerson; Márquez, Nelson; Delgado, Nacarid; Cáceres, Ana; Luzardo, Milangel; Parra, Iran; +2 Authors

Comportamiento de agregación de noveles surfactantes de par iónico

Abstract

Los ácidos alquilcarboxílicos pueden dar origen a la formación de una especie iónica con características anfifílicas que disminuye la tensión superficial de un sistema agua/aire. El tipo de contraión de estas especies juega un papel fundamental en las propiedades superficiales del compuesto. Se preparó una novedosa clase de surfactantes de par iónico (SPI) por neutralización de cantidades equimolares del ácido carboxílico con una base de tipo ciclohexilamina (cHACn) bajo condiciones suaves de reacción. Se estudió el comportamiento de agregación por tensión superficial. Los compuestos obtenidos disminuyeron la tensión superficial presentando baja concentración micelar crítica (CMC) y por tanto una mayor actividad superficial. La CMC de todos los compuestos estudiados disminuyó con la longitud de la cadena alquílica aniónica (n).  Palabras clave: ácidos alquilcarboxílicos, surfactantes de par iónico, comportamiento de agregación, tensión superficial. ABSTRACT The alkylcarboxylic acids can give origin to the formation of ionic species with amphiphilic characteristics that decreases the surface tension of a water/air system. The type of counterion of these species plays a fundamental paper in the surface properties of the compound. Novel class ion pair surfactants (IPS) were prepared by neutralization of equimolar amounts of carboxylic acid with a base of type cyclohexylamine (cHACn) though mild reaction conditions. The aggregation behavior through surface tension was studied. The compounds obtained reduced the surface tension presenting low critical micelar concentration (CMC) and therefore a greater surface activity. The CMC of all compounds studied decreased with the length of the anionic alkyl chain (n).  Key words: Alkylcarboxylic acids, ion pair surfactant, aggregation behavior, surface tension.

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Keywords

Alkylcarboxylic acids, Science (General), Science, Q, surfactantes de par iónico, Q1-390, ácidos alquilcarboxílicos, surface tension, comportamiento de agregación, tensión superficial, ion pair surfactant, aggregation behavior

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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