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El ordenamiento molecular de las sales fundidas orgánicas desencadenado por los nanotubos de carbono de pared única
Takanori Fukushima1, Atsuko Kosaka, Yoji Ishimura
1Aida Nanospace, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation (JST), National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan. fukushima@nanospace.miraikan.jst.go.jp
Science (New York, N.Y.)
|June 28, 2003
Resumen
Los líquidos iónicos a temperatura ambiente y los nanotubos de carbono de pared única forman geles estables a través del enlace físico. Este proceso permite la creación de compuestos conductores de polímero / nanotubos con mayor dureza.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Química Física es la química física.
Sus antecedentes:
- Los nanotubos de carbono de pared única (SWCNT) son conocidos por sus propiedades mecánicas y eléctricas únicas.
- Los líquidos iónicos a temperatura ambiente (RTIL) ofrecen propiedades de disolvente ajustables y no volatilidad.
- El desarrollo de materiales estables basados en SWCNT es crucial para aplicaciones avanzadas.
Objetivo del estudio:
- Para investigar el comportamiento de gelación de SWCNTs prístino en RTILs basados en iones de imidazolio.
- Para aclarar el mecanismo de formación de gel y las propiedades de los geles resultantes.
- Explorar la fabricación de materiales compuestos avanzados utilizando líquidos iónicos polimerizables.
Principales métodos:
- Moldeo de SWCNTs con RTILs basados en iones de imidazolio para inducir la gelación.
- Mediciones reológicas y análisis de transición de fase para caracterizar las propiedades del gel.
- Fabricación de compuestos de polímero/nanotubos utilizando líquidos iónicos polimerizables.
Principales resultados:
- SWCNTs formó geles en RTILs, con paquetes de nanotubos que se desenredan en estructuras más finas.
- La formación de gel se atribuyó al enlace cruzado físico mediado por el ordenamiento molecular del líquido iónico, no al entrelazamiento SWCNT.
- Los geles resultantes exhibieron estabilidad térmica y resistencia a la presión reducida.
- Se observó una transición de gel a sólido en materiales absorbentes.
- Los compuestos de polímero / SWCNT demostraron una alta electroconductividad y una mayor dureza dinámica.
Conclusiones:
- Los RTIL basados en iones de imidazolio pueden mediar efectivamente la formación de geles SWCNT estables.
- El mecanismo de gelación implica el enlace cruzado físico de SWCNTs con plantilla de líquido iónico.
- Este enfoque facilita la creación de compuestos de nanotubos de polímero robustos y conductores con propiedades mecánicas mejoradas.
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