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Síntesis sin catalizadores de las oligoanilinas y las nanofibras de polianilina utilizando H(2) O(2)

Sumedh P Surwade¹, Srikanth Rao Agnihotra, Vineet Dua

¹Department of Chemical Engineering, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.

Journal of the American Chemical Society

|September 3, 2009

Resumen

Los investigadores sintetizaron las nanofibras de polianilina y oligoanilina utilizando un nuevo sistema acuoso. Estas nanofibras demuestran una respuesta de resistencia química reversible al vapor de dióxido de nitrógeno a temperatura ambiente.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química de Polímeros La Química de Polímeros es la química de los polímeros.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

La polianilina y sus oligómeros son polímeros conductores con aplicaciones potenciales en la detección.
El desarrollo de métodos de síntesis eficientes para nanofibras de peso molecular controlado es crucial para optimizar las propiedades de los materiales.

Objetivo del estudio:

Para sintetizar las nanofibras de polianilina y oligoanilina con pesos moleculares controlados.
Para investigar la respuesta de resistencia química de las películas de oligoanilina al dióxido de nitrógeno (NO2) vapor.

Principales métodos:

Utilizó un sistema acuoso de alta resistencia iónica para la polimerización.
Empleado peróxido de hidrógeno (H2O2) como un agente oxidante suave sin catalizadores.
Películas finas fabricadas de oligoanilinas sobre sustratos de plástico.

Principales resultados:

Se han sintetizado con éxito nanofibras de polianilina y oligoanilina (tetraanilina, octaanilina, hexadecaanilina) con pesos moleculares controlados.
Las películas de oligoanilina exhibieron una respuesta de resistencia química robusta y reversible al vapor de NO2.
La detección fue efectiva a temperatura ambiente en el aire ambiente a través de un rango de concentración de 100-5 ppm NO2.

Conclusiones:

El sistema acuoso desarrollado proporciona un método versátil y suave para sintetizar nanofibras de polímero conductoras.
Las resistencias químicas basadas en oligoanilina son prometedoras para la detección sensible y selectiva de dióxido de nitrógeno a temperatura ambiente.

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