Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of Marble
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Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of MarbleDate
2019-07-28Center/Dept./Entity
Laboratorio de Aplicacións Industriais do Láser, Centro de Investigacións TecnolóxicasCitation
López, A.J.; Ramil, A.; Pozo-Antonio, J.S.; Rivas, T.; Pereira, D. Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of Marble. Sustainability 2019, 11, 4079. https://doi.org/10.3390/su11154079
Abstract
[Abstract] Conservation strategies to reduce the degradation of stone caused by the action of water are focusing on increasing the hydrophobicity of the surface by imitating existing solutions in nature (lotus leafs and others). These are mainly based on the existence of hierarchical roughness with micro- and nanoscale structures. In the case of marble, research has focused on protective coatings that sometimes are dangerous for the health and the environment, and with undesirable effects such as color changes or reduction of water vapor permeability of the stone. Laser texturing, however, is an environmentally friendly technique, because no chemicals or toxic waste are added and, moreover, it can process nearly all types of materials. It has been used to change the surface texture of metals and other materials on a micro or even nanometric scale, to meet a specific functional requirement, such as hydrophobicity. The objective of this work was to analyze the feasibility of this technique to provide hydrophobic properties to a marble surface without appreciable changes in its appearance. Therefore, an analysis of the irradiation parameters with ultra-short-pulse laser was performed. Preliminary results demonstrate the ability of this technique to provide hydrophobic character the marble (contact angles well above 90∘). Besides, the analysis of the treated surfaces in terms of roughness, color and gloss indicates that changes in the appearance of the surface are minimal when properly selecting the process parameters.
Keywords
Humedad en la construcción
Láseres en conservación y restauración
Mármol - Conservación y restauración
Marble
Wettability properties
Hydrophobicity
Laser surface texturing
Multiscale roughness
Cultural heritage
Ultrafast pulse laser
Láseres en conservación y restauración
Mármol - Conservación y restauración
Marble
Wettability properties
Hydrophobicity
Laser surface texturing
Multiscale roughness
Cultural heritage
Ultrafast pulse laser
Editor version
Rights
Atribución 4.0
ISSN
2071-1050