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Nanocomposite acrylic paint with self-cleaning action

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Abstract

A nanodispersion of surface-functionalized fumed silica was incorporated into an acrylic paint formulation. SEM imaging indicated good dispersion of silica within the polymer matrix. This hybrid coating showed significantly lower dirt pick-up than the equivalent paint formulation without nanosilica additive, towards both organic and inorganic ashes. Washing with running water further decreases dirt retention. This self-cleaning performance remained unchanged after several dirt/washing cycles, during a 1-month period. Surface hardness measurements indicated no significant differences between the original and composite paint films. The lower dirt pick-up was attributed to nanoroughness created by the nanosilica particles present in the film.

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Acknowledgments

Funding for this study was provided by FEDER, through Programa Operacional Factores de Competitividade—COMPETE, and by national funding through FCT—Fundação para a Ciência e a Tecnologia, in the framework of projects PTDC/EQU-EQU/65300/2006 and FCOMP010202FEDER005291. Catarina Carneiro thanks FCT for PhD grant SFRH/BDE/15569/2005. The authors also wish to thank ARCP (Polymer Competences Network) for providing laboratory facilities for part of this study.

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Correspondence to Fernão D. Magalhães.

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Carneiro, C., Vieira, R., Mendes, A.M. et al. Nanocomposite acrylic paint with self-cleaning action. J Coat Technol Res 9, 687–693 (2012). https://doi.org/10.1007/s11998-012-9407-9

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  • DOI: https://doi.org/10.1007/s11998-012-9407-9

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