Wood Fireproofing Coatings Based on Biobased Phenolic Resins

Abstract

Different formulations of phenolic resins based on two natural products, namely, lignin and tannins, were implemented as biobased fireproofing coatings for wood. Moreover, inorganic nanoparticles were included as additives for improving the thermal resistance of the coatings. The biobased coating formulations were first characterized for their structure and thermal properties via Fourier transformed infrared (FTIR) and thermogravimetric analyses (TGA). Then, their fireproofing performance was assessed over a softwood and a hardwood species. Various parameters were studied, such as the heat released during combustion, the integrity of the samples, and the flames’ propagation. Furthermore, their performance regarding the mentioned parameters was evaluated with respect to two different commercial formulations (top-ranked fireproofing coatings). It was confirmed that the risks derived from the exposure of wood to fire were significantly reduced after the application of the biobased coatings: the heat release during combustion was reduced, a protective effect was achieved concerning wood integrity, and the propagation of the flames was significantly delayed. Besides, these parameters displayed a better performance on beechwood compared to maritime pinewood. Finally, it was observed that the results obtained by the biobased coating formulations RA and RB were comparable to those achieved with the used commercial fireproofing coatings.

Preparation and properties of green UV‐curable itaconic acid cross‐linked modified waterborne polyurethane coating

“…Most obviously, the surface of sample is relatively irregular with many wrinkles and protrusions in Figure 7e, resulting from the relative increase in the cross-linking densities and the microphase separation between the hard and soft segments. 56 This may be another reason for the significant increase in the water CA of the sample as the IHA ratio increased from 2.5% to 10%. The CA analysis is used to study the hydrophilicity and hydrophobicity of the coating.…”

Tannin as a renewable raw material for adhesive applications: a review

“…Although tannin has been commercialized for leather manufacturing industries, in the recent past, tannin has emerged as a promising natural phenolic polymer and has significant applications in various sectors, including adhesives, coatings, bio-foams, automotive and building sectors etc. 215,216 Tannin as a raw material, however, for adhesive applications still poses certain issues, like short pot life, high viscosity, reactivity, and poor weather resistance. Comprehensive investigation and introduction of newer concepts like copolymerization, chemical modifications etc., can catalyse the development of tannin as a sustainable raw material for adhesive applications.…”

Modification Mechanism of Phenol-formaldehyde Resin with Crude Bio-oil by Model Compound Method

“…The copyright holder for this preprint this version posted July 6, 2022. ; https://doi.org/10.1101/2022.07.04.498740 doi: bioRxiv preprint past decade, researchers have successfully produced bio-based PF by replacing phenol with sustainable materials such as lignin [3][4][5][6], tannins [7,8], cardanol [9], furfural [10], glyoxal [11] and bio-oil [12][13][14][15]. Bio-oil, the main product of the rapid pyrolysis of biomass, has been successfully used in the preparation of PF resin in recent years [16][17][18].…”

“…With the promotion of global policies on resource shortage and environmental protection, seeking or developing a renewable resource to substitute phenol for preparing PF is becoming more important. Over the past decade, researchers have successfully produced bio-based PF by replacing phenol with sustainable materials such as lignin [3][4][5][6], tannins [7,8], cardanol [9], furfural [10], glyoxal [11] and bio-oil [12][13][14][15]. Bio-oil, the main product of the rapid pyrolysis of biomass, has been successfully used in the preparation of PF resin in recent years [16][17][18].…”