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Superficies superomnifóbicas para el blindaje químico eficaz.
Shuaijun Pan1, Arun K Kota, Joseph M Mabry
1Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
Journal of the American Chemical Society
|December 26, 2012
Resumen
Los investigadores desarrollaron superficies superomnifóbicas efectivas contra líquidos tanto newtonianos como no newtonianos. Estas superficies avanzadas actúan como escudos químicos robustos, que repelen una amplia gama de sustancias orgánicas e inorgánicas.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química de las superficies.
- La dinámica de fluidos es la dinámica de fluidos.
Sus antecedentes:
- Las superficies superomnifóbicas repelen la mayoría de los líquidos, exhiben altos ángulos de contacto y baja histeresis.
- Las superficies superomnifóbicas existentes a menudo están limitadas en su efectividad contra fluidos no newtonianos.
Objetivo del estudio:
- Para crear superficies que demuestren superomnifobicidad con un amplio espectro de líquidos newtonianos y no newtonianos.
- Desarrollar escudos químicos efectivos contra diversos tipos de líquidos.
Principales métodos:
- Fabricación de superficies con texturas jerárquicas y reentrantes.
- Prueba de repelencia de líquidos utilizando varios fluidos newtonianos y no newtonianos, incluidos ácidos, bases, disolventes y soluciones de polímeros.
Principales resultados:
- Las superficies desarrolladas lograron superomnifobicidad (> 150 ° ángulo de contacto, baja histeresis) con una amplia gama de líquidos.
- Se ha demostrado su repelencia contra líquidos newtonianos (ácidos, bases, disolventes) y líquidos no newtonianos (soluciones de polímeros viscoelásticos).
- Los líquidos se enrollaban y rebotaban fácilmente, lo que indica una adhesión mínima sólido-líquido.
Conclusiones:
- Las superficies texturizadas reentrantes jerárquicas reducen efectivamente el área de contacto sólido-líquido.
- Estas superficies proporcionan robustas capacidades de protección química contra una amplia gama de líquidos orgánicos e inorgánicos, independientemente de sus propiedades reológicas.
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