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Microemulsiones de dióxido de carbono en agua con dióxido de carbono en agua.
C Ted Lee1, Won Ryoo, P Griffin Smith
1Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA.
Journal of the American Chemical Society
|March 6, 2003
Resumen
El dióxido de carbono hincha las micelas de PFPE-K en el agua, formando nuevas microemulsiones de CO2 en agua. Estas microemulsiones mejoran la solubilidad del pireno y pueden solubilizar tanto sustancias lipofílicas como fluorófilas.
Área de la Ciencia:
- Ciencias coloidales y de la superficie.
- Química de los materiales Química de los materiales
- Química Física es la química física.
Sus antecedentes:
- Los carboxilatos de perfluorpoliéter (PFPE-K) forman micelas cilíndricas en soluciones acuosas.
- El dióxido de carbono (CO2) puede interactuar y modificar las estructuras micelares.
Objetivo del estudio:
- Para investigar el efecto del CO2 líquido y supercrítico sobre las micelas de PFPE-K.
- Para caracterizar las microemulsiones de CO2 en agua (C/W) resultantes.
- Para evaluar las capacidades de solubilización de estas nuevas microemulsiones.
Principales métodos:
- Formación de micelas de PFPE-K en el agua.
- Hinchazón de las micelas con el uso de CO líquido y supercrítico.
- Análisis de las dimensiones de las micelas a través de la espectroscopia de fluorescencia.
- Determinación de la solubilidad del pireno.
- Investigación de la localización del pireno dentro de la microemulsión.
Principales resultados:
- CO(2) hincha significativamente las micelas de PFPE-K de 20 nm a 80 nm con una relación CO(2): tensioactivo (R(CO2) de aproximadamente 8.
- La solubilidad del pireno aumenta aproximadamente 10 veces en las micelas hinchadas (microemulsiones C/W).
- Los datos de fluorescencia indican que el pireno es principalmente una partición del núcleo micelo.
Conclusiones:
- Las nuevas microemulsiones de CO2 en agua (C/W) se forman al hinchar las micelas PFPE-K con CO2.
- Estas microemulsiones C/W exhiben una mayor capacidad de solubilización para sustancias lipofílicas como el pireno.
- El estudio demuestra el potencial de las microemulsiones C/W para la solubilización simultánea de compuestos lipofílicos y fluorófilos.
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