期刊
ACS OMEGA
卷 6, 期 19, 页码 12733-12745出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.1c01044
关键词
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资金
- Swedish Innovation Agency (Vinnova), project: Swedish wood -Innovation potential for the bio-based society, DP2: Needed processing of Swedish wood [2017-02697]
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS), project Utilization of solid inorganic waste from the aquaculture industry as wood reinforcement material for flame retardancy [2018-01198]
- Slovak Research and Development Agency [APVV-16-0223]
- Czech Republic's funding office [CZ.02.1.01/0.0/0.0/16_019/0000803]
- CT WOOD -a center of excellence at Lulea University of Technology - Swedish wood industry
- Forte [2018-01198] Funding Source: Forte
- Vinnova [2017-02697] Funding Source: Vinnova
The study aimed to enhance the leaching resistance of fire-retardant modified wood by incorporating a thermoset resin and optimizing the vacuum-pressure treatment process. Results showed that by doping the fire retardants into MF resin microspheres, the water resistance of the wood was improved, and the FR-modified wood exhibited excellent fire performance even after leaching.
The objective of the work was to improve the leaching resistance of fire-retardant (FR) modified wood by the incorporation of a thermoset resin. Here, Scots pine (Pinus sylvestris L.) sapwood was impregnated with melamine formaldehyde (MF) resin and hydrophilic FRs guanyl-urea phosphate/boric acid by a vacuum-pressure treatment. Resistance to leaching of FR-modified wood was evaluated, after conducting an accelerated aging test according to European standard EN 84. Inductively coupled plasma analysis showed that the incorporation of MF resin significantly reduced the leachability of FRs. Scanning electron microscopy/energy-dispersive X-ray spectrometry revealed that the mechanism of water resistance was by doping the FRs into MF resin microspheres. Fourier transform infrared spectra showed the chemical functionality changes of FR-modified wood such as the formation of methylene bridges by drying the modified wood specimens. An increase in the thermal stability of FR-modified wood was confirmed by thermal gravimetric analysis. Excellent fire performance of FR-modified wood after leaching was affirmed by the limiting oxygen index and cone calorimeter tests.
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