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Article

Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials

1
INSA Centre Val de Loire, 88 boulevard Lahitolle, CS60013, 18022 Bourges CEDEX, France
2
Belfast School of Architecture and the Built Environment, Ulster University, Newtownabbey BT37 0QB, Northern Ireland, UK
3
EFECTIS UK& Ireland, Newtownabbey BT37 0QB, UK
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(4), 757; https://doi.org/10.3390/polym12040757
Received: 29 February 2020 / Revised: 27 March 2020 / Accepted: 28 March 2020 / Published: 31 March 2020
Flammability and combustion of softwood treated with intumescent coatings were studied in the present work. The formulations applied onto wood surfaces contained different ratios of industrial fillers, titanium dioxide TiO2 and aluminium trihydroxide Al(OH)3, and/or bio-fillers, eggshell and rice husk ash. Combustion behaviours of unprotected and protected wood samples have been examined with the aid of cone calorimetry performed under the varied levels of thermal flux ranging from 30 to 50 kW/m². The char residues obtained after the completion of cone calorimetry test at 40 kW/m² were analysed by the Raman spectroscopy. The fire protective properties of the studied coatings were strongly influenced by the nature of the fillers as well as by the intensity of thermal irradiance. The incorporation of bio-based fillers into the water-based intumescent formulations significantly improved fire resistance of wood substrates. For example, at 30 kW/m², the Effective Heat of Combustion was reduced by more than 40%, whilst the average Peak to Heat Release Rate had dropped from 193.2 to 150.3 kW/m² for the wood sample protected with the formulation incorporating two industrial and two bio-fillers. Moreover, an application of the studied coatings resulted in a notable reduction of the back surface temperature of the wood specimens. View Full-Text
Keywords: cone calorimeter; intumescent coatings; bio-fillers; wood; flame retardants cone calorimeter; intumescent coatings; bio-fillers; wood; flame retardants
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MDPI and ACS Style

Aqlibous, A.; Tretsiakova-McNally, S.; Fateh, T. Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials. Polymers 2020, 12, 757. https://doi.org/10.3390/polym12040757

AMA Style

Aqlibous A, Tretsiakova-McNally S, Fateh T. Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials. Polymers. 2020; 12(4):757. https://doi.org/10.3390/polym12040757

Chicago/Turabian Style

Aqlibous, Abderrahman, Svetlana Tretsiakova-McNally, and Talal Fateh. 2020. "Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials" Polymers 12, no. 4: 757. https://doi.org/10.3390/polym12040757

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