Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces
An experimental nano-filled coating, based on a fluorine resin containing SiO<sub>2</sub> nano-particles, was applied on calcareous stones, representative of materials used in buildings and monuments of the Mediterranean basin; for comparison purposes, two commercial products were applie...
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2021-01-01
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doaj-24d78b7ec0fe4959bb6b351a5d64be9d2021-01-26T00:02:18ZengMDPI AGNanomaterials2079-49912021-01-011130130110.3390/nano11020301Novel Nano-Filled Coatings for the Protection of Built Heritage Stone SurfacesMariateresa Lettieri0Maurizio Masieri1Mariaenrica Frigione2CNR–SPIN, SuPerconducting and Other INnovative Materials and Devices Institute, via Giovanni Paolo II 132, Fisciano, 84084 Salerno, ItalyCNR–ISPC, Istituto di Scienze del Patrimonio Culturale, Prov.le Lecce-Monteroni, 73100 Lecce, ItalyDepartment of Innovation Engineering, University of Salento, Prov.le Lecce-Monteroni, 73100 Lecce, ItalyAn experimental nano-filled coating, based on a fluorine resin containing SiO<sub>2</sub> nano-particles, was applied on calcareous stones, representative of materials used in buildings and monuments of the Mediterranean basin; for comparison purposes, two commercial products were applied on the same substrates. The efficacy of the protective treatments was assessed by analyzing different characteristics of the three experimental/commercial products, i.e., color changes and permeability to water vapor to evaluate the treatments’ harmlessness; capillary water absorption and water stone contact angle to evaluate the protection against water ingress; oleophobicity of the treated surfaces and the behavior under staining by acrylic blue-colored spray paint and felt-tip marker to verify the anti-graffiti action. Finally, the properties of the treated stone surfaces were analyzed also after the application of pancreatin, used to simulate bird excreta (guano). The protective coatings were found to promote graffiti removal, reducing also the detrimental effects due to simulated guano. The experimental nano-filled product, in addition, was able to provide outstanding performance but using smaller amounts of product in comparison to commercial systems.https://www.mdpi.com/2079-4991/11/2/301stone protectionnano-filled polymeric coatingshydrophobic treatmentsoleophobicityanti-graffiti coatingsacrylic-based paints |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mariateresa Lettieri Maurizio Masieri Mariaenrica Frigione |
spellingShingle |
Mariateresa Lettieri Maurizio Masieri Mariaenrica Frigione Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces Nanomaterials stone protection nano-filled polymeric coatings hydrophobic treatments oleophobicity anti-graffiti coatings acrylic-based paints |
author_facet |
Mariateresa Lettieri Maurizio Masieri Mariaenrica Frigione |
author_sort |
Mariateresa Lettieri |
title |
Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces |
title_short |
Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces |
title_full |
Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces |
title_fullStr |
Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces |
title_full_unstemmed |
Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces |
title_sort |
novel nano-filled coatings for the protection of built heritage stone surfaces |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2021-01-01 |
description |
An experimental nano-filled coating, based on a fluorine resin containing SiO<sub>2</sub> nano-particles, was applied on calcareous stones, representative of materials used in buildings and monuments of the Mediterranean basin; for comparison purposes, two commercial products were applied on the same substrates. The efficacy of the protective treatments was assessed by analyzing different characteristics of the three experimental/commercial products, i.e., color changes and permeability to water vapor to evaluate the treatments’ harmlessness; capillary water absorption and water stone contact angle to evaluate the protection against water ingress; oleophobicity of the treated surfaces and the behavior under staining by acrylic blue-colored spray paint and felt-tip marker to verify the anti-graffiti action. Finally, the properties of the treated stone surfaces were analyzed also after the application of pancreatin, used to simulate bird excreta (guano). The protective coatings were found to promote graffiti removal, reducing also the detrimental effects due to simulated guano. The experimental nano-filled product, in addition, was able to provide outstanding performance but using smaller amounts of product in comparison to commercial systems. |
topic |
stone protection nano-filled polymeric coatings hydrophobic treatments oleophobicity anti-graffiti coatings acrylic-based paints |
url |
https://www.mdpi.com/2079-4991/11/2/301 |
work_keys_str_mv |
AT mariateresalettieri novelnanofilledcoatingsfortheprotectionofbuiltheritagestonesurfaces AT mauriziomasieri novelnanofilledcoatingsfortheprotectionofbuiltheritagestonesurfaces AT mariaenricafrigione novelnanofilledcoatingsfortheprotectionofbuiltheritagestonesurfaces |
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