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Multifunctional wall coating combining photocatalysis, self-cleaning and latent heat storage

Multifunctional wall coating combining photocatalysis, self-cleaning and latent heat storage

Lucas, S. S. and Barroso de Aguiar, J. L. (2018) Multifunctional wall coating combining photocatalysis, self-cleaning and latent heat storage. Materials Research Express, 5 (2). ISSN 2053-1591 (Online) (doi:

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Mortars are among the most common materials used in construction however, they have not suffered any substantial change for many decades. This has changed in recent years; new compositions are now being developed, with new functionalities, using nano-additives, fibres and capsules. In this work, surfaces with new and innovative functionalities that promote energy savings and improve air quality have been developed and studied. Incorporation of phase change materials (PCM) and titanium dioxide (TiO2) nanoparticles in construction products is currently under study by different research groups. However, these studies only address their incorporation separately. Adding new additives into the mortar’s matrix can be complex due to microstructural modifications that will influence both fresh and hardened state properties. Moving from a single additive to multiple additions, as in this study, increases the system’s complexity. Only with a good understanding of the microstructural properties, it is possible to add multiple additives (including nano and microparticles) to mortars, without damaging its final properties.

This work demonstrates that a higher additive content is not always a guarantee of better results; lower additions can often provide a better compromise between performance and final mechanical properties. The results presented in this paper confirmed this and show that combining PCM microcapsules and TiO2 nanoparticles open a new path in the development of mortars with multiple functionalities. In this study, a new material with depolluting, self-cleaning and heat storage was created. For the development of new and innovative mortars, a proper balance of multiple additives, supported by the study of microstructural changes, can lead to an optimization of the compositions, ensuring that the mortars final properties are not affected.

Item Type: Article
Uncontrolled Keywords: photocatalysis, phase change materials, mortars, self-cleaning, TiO2,PCM
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENG)
Faculty of Engineering & Science > Next Generation Materials Research Theme
Last Modified: 02 Feb 2019 01:38

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