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Article

Eco-Friendly Protective Coating to Extend the Life of Art-Works and Structures Made in Porous Stone Materials

1
CNR-SPIN, SuPerconducting and Other INnovative Materials and Devices Institute, Via Giovanni Paolo II 132, Fisciano, 84084 Salerno, Italy
2
CNR-ISPC, Istituto di Scienze del Patrimonio Culturale, Prov.le Lecce-Monteroni, 73100 Lecce, Italy
3
Department of Innovation Engineering, University of Salento, Prov.le Lecce-Monteroni, 73100 Lecce, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Pezzella
Coatings 2021, 11(11), 1270; https://doi.org/10.3390/coatings11111270
Received: 24 September 2021 / Revised: 12 October 2021 / Accepted: 18 October 2021 / Published: 20 October 2021
(This article belongs to the Special Issue Superhydrophobic and Superoleophobic Surfaces)
The application of hydrophobic treatments to stone surfaces is the most common proven method to prevent, or at least limit, the degradation of stone-made constructions and artworks brought about by the ingress and action of water, in particular in the case of very porous stone materials. To avoid the use of protective products containing harmful solvents, new green products have been proposed. In this paper, an eco-friendly hydrophobic coating, based on a fluorine polymer dispersed in water, was deeply analyzed to evaluate its protective properties, especially for very porous stone substrates. To this aim, a wide characterization of treated and untreated Lecce stone elements, i.e., a stone typical of the Apulia region, was carried out to assess the optimum required amount, the effectiveness and the protective capability, even against graffiti staining, of the green hydrophobic treatment, still allowing the stone to retain adequate vapor permeability. The efficacy of the eco-friendly product was analyzed also after a short time (four weeks) of outdoor exposure. Suitable performance and short-term durability of the green hydrophobic coating were found, comparable or even greater than those reported in the current literature for other widespread commercial products, confirming the capability of the product to preserve porous stone surfaces even in absence of solvents in its formulation. The study also allowed to experiment with the “contact sponge” test as an appropriate method for evaluating the water absorption properties of the stone. View Full-Text
Keywords: stone protection; cultural heritage; eco-friendly protectives; hydrophobic treatments; anti-graffiti; multifunctional coatings stone protection; cultural heritage; eco-friendly protectives; hydrophobic treatments; anti-graffiti; multifunctional coatings
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MDPI and ACS Style

Lettieri, M.; Masieri, M.; Aquaro, M.; Dilorenzo, D.; Frigione, M. Eco-Friendly Protective Coating to Extend the Life of Art-Works and Structures Made in Porous Stone Materials. Coatings 2021, 11, 1270. https://doi.org/10.3390/coatings11111270

AMA Style

Lettieri M, Masieri M, Aquaro M, Dilorenzo D, Frigione M. Eco-Friendly Protective Coating to Extend the Life of Art-Works and Structures Made in Porous Stone Materials. Coatings. 2021; 11(11):1270. https://doi.org/10.3390/coatings11111270

Chicago/Turabian Style

Lettieri, Mariateresa, Maurizio Masieri, Marika Aquaro, Debora Dilorenzo, and Mariaenrica Frigione. 2021. "Eco-Friendly Protective Coating to Extend the Life of Art-Works and Structures Made in Porous Stone Materials" Coatings 11, no. 11: 1270. https://doi.org/10.3390/coatings11111270

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