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Formación espontánea de vesículas en mezclas acuosas de tensioactivos de una sola cola
E W Kaler1, A K Murthy, B E Rodriguez
1Department of Chemical Engineering, University of Washington, Seattle 98195.
Science (New York, N.Y.)
|September 22, 1989
Resumen
Los investigadores crearon vesículas de equilibrio estables, de pared única, utilizando surfactantes catiónicos y aniónicos simples. El ajuste de la proporción de tensioactivo controla las propiedades de las vesículas como el tamaño y la permeabilidad, ofreciendo un nuevo método para la preparación de las vesículas.
Área de la Ciencia:
- Ciencias coloidales y de la superficie.
- Química de los materiales Química de los materiales
- Química supramolecular de las moléculas.
Sus antecedentes:
- La preparación convencional de las vesículas a menudo implica una interrupción mecánica.
- Controlar las propiedades de las vesículas como el tamaño y la permeabilidad puede ser un desafío.
- La formación de vesículas de equilibrio ofrece una alternativa potencialmente más simple.
Objetivo del estudio:
- Desarrollar un método para preparar vesículas de equilibrio espontáneas, de pared única y de equilibrio.
- Para investigar la influencia de las proporciones de agentes tensioactivos en las características de las vesículas.
- Para comparar la estabilidad de estas vesículas con las preparadas convencionalmente.
Principales métodos:
- Mezcla de surfactantes catiónicos y aniónicos de una sola cola en soluciones acuosas.
- Variando la relación entre el tensioactivo aniónico y el catiónico.
- Caracterizar las propiedades de las vesículas (tamaño, carga superficial, permeabilidad).
Principales resultados:
- Se logró la formación espontánea de vesículas de equilibrio estables, de pared única.
- El tamaño de la vesícula, la carga superficial y la permeabilidad eran ajustables ajustando la relación de surfactante.
- El mecanismo de formación de las vesículas implica la formación de pares de surfactantes aniónico-cationales, que actúan como surfactantes de doble cola.
- Estas vesículas exhibieron una mayor estabilidad en comparación con las vesículas preparadas mecánicamente.
Conclusiones:
- Se ha establecido un método novedoso y sencillo para preparar vesículas de equilibrio estable a partir de surfactantes comunes.
- La capacidad de ajustar las propiedades de las vesículas a través de la relación de surfactante ofrece ventajas significativas para diversas aplicaciones.
- La estabilidad observada sugiere potencial para su uso en la administración de fármacos y otras aplicaciones de materiales avanzados.
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