Abstract In order to improve dimensional stability and durability of wood, furfurylation of poplar and Chinese fir wood using newly developed furfuryl alcohol (FA) formulation combined with a common vacuum and pressure impregnation process was studied. An orthogonal experiment was designed to optimize the furfurylation process for the two wood species. The weight percent gain (WPG), equilibrium moisture content (EMC), anti-swelling efficiency (ASE), modulus of rupture (MOR), modulus of elasticity (MOE), as well as resistance to mold, decay fungi, and termites were evaluated. The results showed that nearly all the properties of the furfurylated wood could be improved to various extents. The average ASE of the furfurylated Chinese fir and poplar could reach as high as 80, 71, 92% and 79, 90, 75% in tangential and radial directions, and by volume, respectively, higher than most previously reported wood modification processes. Furthermore, the modified wood had excellent biological durability, with nearly 100% mold resistance, strong decay and termite resistance. Finally, processing parameters with 50% FA, 105–115 °C curing temperature, and 5–8 h curing time were therefore recommended for pilot-scale production of furfurylated poplar and Chinese fir wood based on range analysis.

中文翻译：

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制造高度稳定和耐用的糠醛木材料。第一部分：流程优化

摘要 为了提高木材的尺寸稳定性和耐久性，研究了使用新开发的糠醇（FA）配方结合常见的真空和压力浸渍工艺对杨木和杉木木材进行糠醛化。设计了正交试验来优化两种木材的糠醛化过程。增重百分比 (WPG)、平衡含水量 (EMC)、抗膨胀效率 (ASE)、断裂模量 (MOR)、弹性模量 (MOE) 以及对霉菌、腐烂真菌和白蚁的抵抗力分别为评估。结果表明，几乎所有糠醛木材的性能都可以得到不同程度的改善。糠醛化杉木和杨树的平均 ASE 在切向和径向分别高达 80%、71%、92% 和 79%、90%、75%，按体积计算，分别高于大多数先前报道的木材改性工艺。此外，改性木材具有优异的生物耐久性，具有近100%的抗霉性、很强的抗腐性和抗白蚁性。最后，基于范围分析，推荐使用 50% FA、105-115°C 固化温度和 5-8 小时固化时间的工艺参数用于糠化杨木和杉木木材的中试生产。