Preparation and characterization of protective self-cleaning TiO<sub>2</sub>/kaolin composite coating

V. Jovanov; V. Zečević; T. Vulić; J. Ranogajec; E. Fidanchevska

doi:10.3989/mc.2018.08517

Autores/as

V. Jovanov Ss.Cyril and Methodius, University in Skopje, Faculty of Technology and Metallurgy https://orcid.org/0000-0001-7734-0757
V. Zečević University of Novi Sad, Faculty of Technology https://orcid.org/0000-0002-9825-4687
T. Vulić University of Novi Sad, Faculty of Technology https://orcid.org/0000-0001-9431-2846
J. Ranogajec University of Novi Sad, Faculty of Technology https://orcid.org/0000-0002-9831-2998
E. Fidanchevska Ss.Cyril and Methodius, University in Skopje, Faculty of Technology and Metallurgy https://orcid.org/0000-0003-2919-5916

DOI:

https://doi.org/10.3989/mc.2018.08517

Palabras clave:

Compuesto, Durabilidad, Caracterización, Microestructura, Distribución de tamaños de partículas de, Microscopía Electrónica de Barrido (MEB), Difracción de rayos X (DRX)

Resumen

La aplicación de recubrimientos autolimpiantes presenta una de las maneras más efectivas de proteger las superficies de los materiales de construcción. Se ha investigado el efecto de recubrimientos basados en TiO₂/caolín, aplicados sobre tres tipos de sustratos: no poroso, poroso y altamente poroso. Se utilizó activación mecánica para la impregnación del componente de TiO₂ activo (en contenido del 3 y 10% en peso) sobre el soporte de caolín. Se han estudiado las propiedades superficiales (rugosidad, hidrofilicidad y microdureza) y las propiedades funcionales (actividad fotocatalítica y eficacia autolimpiante) para definir la formulación óptima de las capas aplicadas. El efecto del comportamiento fotocatalítico de los sustratos revestidos en términos de capacidad de autolimpieza se evaluó mediante la fotodegradación de Rodamina B, realizada antes y después de las pruebas de durabilidad. Los resultados obtenidos en este trabajo mostraron que la actividad fotocatalítica del revestimiento de TiO₂/ caolín, dependen en general del procedimiento de impregnación de TiO₂ en la capa de caolín y el contenido utilizado de TiO₂.

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