
handle: 10261/2501
En este trabajo se ha realizado la caracterización de lasuperficie de diferentes materiales de construcción (mármol,arenisca, granito y ladrillo) mediante cromatografíainversa gas-sólido a dilución infinita. La energía superficialse puede dividir en dos componentes: dispersiva yácido-base. Los valores obtenidos para la energía dispersivason bastante parecidas para mármol, granito yladrillo, mientras que el valor más alto corresponde a laarenisca. Además, este material presenta una menorvariación de la energía dispersiva con la temperatura loque indica que la interacción de cualquier sustancia consu superficie se dará a cualquier temperatura. Por lo querespecta a las componentes ácido-base, se ha observadoque todos los materiales poseen ambas componenteslo que indica un carácter anfótero, sin embargo, la acidezes mayor en el granito y en el ladrillo, mientras quela basicidad es mayor en la arenisca y en el mármol.
Inverse gas chromatography at infinite dilution was used to characterize the surface of different construction materials (marble, sandstone, granite and brick). Surface energy can be divided into two components: dispersive and polar or acid-base. The highest dispersive energy value was found for sandstone, while the values for the other three materials were all very similar. The lower dispersive energy variation exhibited by sandstone with temperature changes is an indication that substances interact equally well with its surface at any temperature. All the materials were found to be amphoteric, with both acid and alkaline components, although acidity was greater in granite and brick and sandstone and marble had higher alkalinity.
Este trabajo ha sido realizado gracias a la financiación por parte del Ministerio de Educación y Cultura mediante el Proyecto CICYT MAT2003-08343. Los autores además agradecen a M.ª T. Blanco-Varela las correcciones y sugerencias realizadas para mejorar este trabajo.
Peer reviewed
Energía, Superficie, Materiales de construcción, Caracterización, Cromatografía
Energía, Superficie, Materiales de construcción, Caracterización, Cromatografía
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