Lin Chia-Feng, Karlsson Olov, Kim Injeong, Myronycheva Olena, Mensah Rhoda Afriyie, Försth Michael, Das Oisik, Mantanis George I, Jones Dennis, Sandberg Dick
Wood Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-931 77 Skelleftea, Sweden.
Structural and Fire Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Lulea, Sweden.
Polymers (Basel). 2022 Apr 29;14(9):1829. doi: 10.3390/polym14091829.
Guanyl-urea phosphate (GUP) was introduced into furfurylated wood in order to improve fire retardancy. Modified wood was produced via vacuum-pressure impregnation of the GUP-furfuryl alcohol (FA) aqueous solution, which was then polymerized at elevated temperature. The water leaching resistance of the treated wood was tested according to European standard EN 84, while the leached water was analyzed using ultra-performance liquid chromatography (UPLC) and inductively coupled plasma-sector field mass spectrometry (ICP-SFMS). This new type of furfurylated wood was further characterized in the laboratory by evaluating its morphology and elemental composition using optical microscopy and electron microscopy coupled with energy-dispersive X-ray spectrometry (SEM-EDX). The chemical functionality was detected using infrared spectroscopy (FTIR), and the fire resistance was tested using cone calorimetry. The dimensional stability was evaluated in wet-dry soaking cycle tests, along with the mechanical properties, such as the Brinell hardness and bending strength. The fire retardancy of the modified furfurylated wood indicated that the flammability of wood can be depressed to some extent by introducing GUP. This was reflected in an observed reduction in heat release rate (HRR) from 454.8 to 264.9 kW/m, without a reduction in the material properties. In addition, this leaching-resistant furfurylated wood exhibited higher fire retardancy compared to conventional furfurylated wood. A potential method for producing fire-retardant treated furfurylated wood stable to water exposure has been suggested.
为提高阻燃性，将磷酸胍基脲（GUP）引入糠醇化木材中。通过对GUP-糠醇（FA）水溶液进行真空加压浸渍制备改性木材，然后在高温下聚合。根据欧洲标准EN 84测试处理后木材的耐水浸出性，同时使用超高效液相色谱（UPLC）和电感耦合等离子体质谱仪（ICP-SFMS）分析浸出液。在实验室中，通过光学显微镜和电子显微镜结合能量色散X射线光谱仪（SEM-EDX）对这种新型糠醇化木材的形态和元素组成进行进一步表征。使用红外光谱（FTIR）检测化学官能团，使用锥形量热法测试耐火性。在干湿浸泡循环试验中评估尺寸稳定性，以及诸如布氏硬度和弯曲强度等机械性能。改性糠醇化木材的阻燃性表明，通过引入GUP可在一定程度上降低木材的可燃性。这体现在热释放速率（HRR）从454.8 kW/m降至264.9 kW/m，而材料性能并未降低。此外，这种耐浸出的糠醇化木材比传统糠醇化木材表现出更高的阻燃性。提出了一种生产对水暴露稳定的阻燃处理糠醇化木材的潜在方法。
