LAPSE:2023.32370v1
Published Article
LAPSE:2023.32370v1
The Effect of the Substrate on the Optic Performance of Retro-Reflective Coatings: An In-Lab Investigation
April 20, 2023
Abstract
Retro-reflectivity is a promising surface capability, which has attracted the interest of researchers for building applications in order to counteract Urban Heat Island (UHI) effects. This work aims at studying the impact of the substrate material on the optic performance of retro-reflective (RR) coatings. Three types of substrate materials were investigated: smooth pine wood panels, rough plywood panels, and smooth acetate sheets. The RR coating samples were made by firstly adding a high reflective white paint onto the substrate material and a homogeneous RR glass beads layer on the top. As a reference case, also diffusive samples, without RR beads, were developed. Samples have been tested through a spectrophotometric and an angular reflectivity analysis. Results show that, despite a lower global reflectance of the RR samples with respect to the diffusive ones, the glass beads coating provides a good retro-reflective capability to all the diffusive samples. Additionally, the roughest RR sample exhibited the highest RR capability of up to 16%, with respect to the other smoother samples. Future developments may involve the optimum design of RR coatings, in terms of their optic performance by varying the substrate materials and roughness, the glass beads density and dimension.
Retro-reflectivity is a promising surface capability, which has attracted the interest of researchers for building applications in order to counteract Urban Heat Island (UHI) effects. This work aims at studying the impact of the substrate material on the optic performance of retro-reflective (RR) coatings. Three types of substrate materials were investigated: smooth pine wood panels, rough plywood panels, and smooth acetate sheets. The RR coating samples were made by firstly adding a high reflective white paint onto the substrate material and a homogeneous RR glass beads layer on the top. As a reference case, also diffusive samples, without RR beads, were developed. Samples have been tested through a spectrophotometric and an angular reflectivity analysis. Results show that, despite a lower global reflectance of the RR samples with respect to the diffusive ones, the glass beads coating provides a good retro-reflective capability to all the diffusive samples. Additionally, the roughest RR sample exhibited the highest RR capability of up to 16%, with respect to the other smoother samples. Future developments may involve the optimum design of RR coatings, in terms of their optic performance by varying the substrate materials and roughness, the glass beads density and dimension.
Record ID
Keywords
angular reflectivity, glass beads, optic analysis, retro-reflective coatings, Urban Heat Island
Subject
Suggested Citation
Di Giuseppe A, Cardinali M, Castellani B, Filipponi M, Gambelli AM, Postrioti L, Nicolini A, Rossi F. The Effect of the Substrate on the Optic Performance of Retro-Reflective Coatings: An In-Lab Investigation. (2023). LAPSE:2023.32370v1
Author Affiliations
Di Giuseppe A: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy [ORCID]
Cardinali M: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy [ORCID]
Castellani B: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Filipponi M: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Gambelli AM: Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Postrioti L: Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
Nicolini A: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Rossi F: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Cardinali M: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy [ORCID]
Castellani B: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Filipponi M: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Gambelli AM: Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Postrioti L: Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
Nicolini A: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Rossi F: CIRIAF, Interuniversity Research Centre on Pollution and Environment “M. Felli”, Via G. Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy [ORCID]
Journal Name
Energies
Volume
14
Issue
10
First Page
2921
Year
2021
Publication Date
2021-05-18
ISSN
1996-1073
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PII: en14102921, Publication Type: Journal Article
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LAPSE:2023.32370v1
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https://doi.org/10.3390/en14102921
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Apr 20, 2023
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