Effect of diammonium phosphate on the flammability of wood and wood–polymethylmethacrylate composites

Kishore, K.; Mohandas, K.S.; Sagar, Diaeddin

doi:10.1002/fam.810040303

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…According to DTG, the maximum degradation temperature is shifted down to a lower temperature with PEC treatment (Ref: 361 °C, PEI:SPA_1:2: 326 °C and PEI:SPA_1:3: 326 °C). Phosphorus compounds are widely known to catalyze cellulose degradation because of cellulose dehydration by phosphoric and polyphosphoric acids [ 79 , 80 ], which explains the shift mentioned. Treated YB with PEI:SPA_1:3 exhibits less desorption at 100 °C, which can be interpreted as a reduction in wood hygroscopicity after PEC treatment.…”

Section: Resultsmentioning

confidence: 99%

Innovative Polyelectrolyte Treatment to Flame-Retard Wood

et al. 2021

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Fire protection has been a major challenge in wood construction for many years, mainly due to the high flame spread risk associated with wood flooring. Wood fire-retardancy is framed by two main axes: coating and bulk impregnation. There is a growing need for economically and environmentally friendly alternatives. The study of polyelectrolyte complexes (PECs) for wood substrates is in its infancy, but PECs’ versatility and eco-friendly character are already recognized for fabric fire-retardancy fabrics. In this study, a new approach to PEC characterization is proposed. First, PECs, which consist of polyethyleneimine and sodium phytate, were chemically and thermally characterized to select the most promising systems. Then, yellow birch (Betula alleghaniensis Britt.) was surface-impregnated under reduced pressure with the two PECs identified as the best options. Overall, wood fire-retardancy was improved with a low weight gain of 2 wt.% without increasing water uptake.

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Section: Resultsmentioning

confidence: 99%

Innovative Polyelectrolyte Treatment to Flame-Retard Wood

et al. 2021

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Impact of surface delignification on fire retardancy of wood treated with polyelectrolyte complexes

Soula,

Samyn,

Duquesne

et al. 2024

Holzforschung

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Wood is a natural composite widely employed as a residential building interior finishing. Although wood is readily available and offers benefits to the occupants, such as enhanced well-being, it is rarely employed in commercial construction due, amongst others, to the potential hazard of fire propagation. The application of flame retardant (FR) treatments leads to a reduction of wood flammability and supports wood as interior finishing. Polyelectrolyte complexes (PECs) deposition is an innovative surface treatment that has already proven its efficiency for fabrics. For wood, recent studies have highlighted that the weight gain impacted the fire-retardancy, and a minimum of 2 wt.-% was set to obtain fire protection. This study explored the potential of surface delignification to activate the wood surface and facilitate the PEC impregnation. Yellow birch (Betula alleghaniensis, Britt.) was surface delignified (0.3 mm) using sodium chlorite. The treatment impact on wood was evaluated by spectroscopy analysis (FTIR, Raman), and the increase in wood wettability was demonstrated (contact angle decreases from 50° to 35° after the surface delignification). Then, PECs consisting of polyethyleneimine and sodium phytate were surface impregnated in wood and delignified wood. The flame retardancy was evaluated using a cone calorimeter. Despite the increase in weight gain (1.5 wt.-% ± 0.3 wt.-% to 4.3 wt.-% ± 2.5 wt.-%), fire performance was not improved. This study demonstrates that lignin strongly affects char formation, even in the presence of PECs.

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Effect of diammonium phosphate on the flammability of wood and wood–polymethylmethacrylate composites

Cited by 2 publications

References 2 publications

Innovative Polyelectrolyte Treatment to Flame-Retard Wood

Innovative Polyelectrolyte Treatment to Flame-Retard Wood

Impact of surface delignification on fire retardancy of wood treated with polyelectrolyte complexes

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