Insights on Passive Fire Protection of Wood Materials in Use at Wildland–Urban Interface: Case of Intumescent Coatings †
Equipe de Recherche sur les Feux, UMR CNRS 6134 SPE, Università di Corsica, 20250 Corte, France
*
Author to whom correspondence should be addressed.
†
Presented at the Third International Conference on Fire Behavior and Risk, Sardinia, Italy, 3–6 May 2022.
Environ. Sci. Proc. 2022, 17(1), 117; https://doi.org/10.3390/environsciproc2022017117
Published: 1 September 2022
(This article belongs to the Proceedings of The Third International Conference on Fire Behavior and Risk)
Wood materials used as furniture or construction at WUI constitute a hazard in case of wildfire exposure. Structure elements may act as spread vectors from the wildland to the housings leading to security issues. In a context of on-going increasing risk, fire proofing of materials becomes a leading problem in terms of fire safety concerns. Fire retardants are classified following their thermal behavior and action mechanisms. Among these, intumescent coatings constitute an innovative way to protect substratum using a synergistic effect leading to the formation of a carbon-rich protective layer. This effect is based on the polymerization of a carbon source with an acid source when exposed to heat flux [1]. A blowing agent releasing inert gases (water, carbon dioxide) can be added to provide better expansion of the char layer [2].
The aim of this study is to define and measure the thermal ability of a newly formulated intumescent mixture at bench scale by using cone calorimeter and thermogravimetric analysis. This formulation contains natural extracts obtained by pressure-assisted method using “green” solvents (ethanol, water and mixtures of both). Measurements of total polyphenol content (TPC) and antioxidant capacity (ORAC) were conducted and indicated high polyphenols and tannins concentration, both showing good capabilities as a carbon source [3,4]. Extracts were then selected following tests carried out with a thermogravimetric analyzer based on char residue at 900 °C and the temperature of maximal decomposition under nitrogen and air flow.
Different ternary formulations shaped into pellets were tested with a cone calorimeter at 50 kW.m−2 irradiance without forced ignition. Physical properties measurements were conducted, including expansion coefficient of char layer (determined by image processing). Samples showing the best results might allow, in further work, the elaboration of a new natural-based intumescent coating for wood materials that might be used at WUI to provide better fire protection for dwellings.
Author Contributions
Methodology, J.-V.L., T.B. and P.-A.S.; validation, J.-V.L., T.B. and P.-A.S.; investigation, J.-V.L.; data curation, J.-V.L., T.B. and P.-A.S.; writing—original draft preparation, J.-V.L.; writing—review and editing, J.-V.L., T.B. and P.-A.S.; supervision, T.B. and P.-A.S. All authors have read and agreed to the published version of the manuscript.
Funding
This research received no external funding.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Data Availability Statement
The data presented in this study are available on request from the corresponding author. The data are not publicly available due to privacy restrictions.
Conflicts of Interest
The authors declare no conflict of interest.
References
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MDPI and ACS Style
Lorenzetti, J.-V.; Barboni, T.; Santoni, P.-A. Insights on Passive Fire Protection of Wood Materials in Use at Wildland–Urban Interface: Case of Intumescent Coatings. Environ. Sci. Proc. 2022, 17, 117. https://doi.org/10.3390/environsciproc2022017117
AMA Style
Lorenzetti J-V, Barboni T, Santoni P-A. Insights on Passive Fire Protection of Wood Materials in Use at Wildland–Urban Interface: Case of Intumescent Coatings. Environmental Sciences Proceedings. 2022; 17(1):117. https://doi.org/10.3390/environsciproc2022017117
Chicago/Turabian StyleLorenzetti, Jean-Valère, Toussaint Barboni, and Paul-Antoine Santoni. 2022. "Insights on Passive Fire Protection of Wood Materials in Use at Wildland–Urban Interface: Case of Intumescent Coatings" Environmental Sciences Proceedings 17, no. 1: 117. https://doi.org/10.3390/environsciproc2022017117
