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Adhesión de aceite dictada por el agua interfacial basada en la modulación iónica
Shaofan He1,2, Xu Jin3, Dianyu Wang4
1Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Journal of the American Chemical Society
|October 24, 2023
Resumen
La estructura interfacial del agua dicta la adhesión del aceite en las superficies. El menor contenido de agua tetracoordinada y el agua desordenada debido a los iones multivalentes mejoran la adhesión del aceite, lo que afecta la recuperación del aceite y la desalinización.
Área de la Ciencia:
- Ciencias de la superficie
- Química Física
- Ciencias del medio ambiente
Sus antecedentes:
- La adhesión del aceite a las superficies iónicas es común en la naturaleza.
- El agua interfacial juega un papel crítico en la adhesión del aceite, pero a menudo se pasa por alto.
- Comprender esta interacción es clave para aplicaciones como la recuperación de petróleo.
Objetivo del estudio:
- Para investigar la adhesión de aceite en superficies monocapa autoensambladas con terminación carboxilo (COOH-SAM) en soluciones iónicas.
- Para aclarar el papel de la estructura de agua interfacial en la adhesión de aceite.
- Para proporcionar una comprensión a nivel molecular de la recuperación de petróleo impulsada por el agua.
Principales métodos:
- Las superficies autoensambladas terminadas en carboxilo (COOH-SAM) utilizadas.
- Estudió la adhesión de aceite en soluciones iónicas.
- Estructura de agua interfacial observada mediante dispersión de Raman mejorada por superficie (SERS).
Principales resultados:
- Un menor contenido de agua tetracoordinada se correlacionó con una mayor adhesión de aceite.
- Los iones multivalentes desordenaron el agua interfacial más que los iones monovalentes, aumentando la adhesión del aceite.
- El aumento del grosor del agua interfacial redujo la adhesión del aceite.
Conclusiones:
- La estructura interfacial del agua es un determinante clave de la adhesión del aceite.
- Los hallazgos explican una mayor recuperación de petróleo en inundaciones de agua de baja salinidad.
- Se indicaron aplicaciones potenciales en microfluidos y desalinización de agua de mar.
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