ABSTRACT

Although furfurylation greatly improves dimensional stability, hardness, and biodegradation resistance of wood and bamboo, the effects of furfurylation on the resistance of wood and bamboo to weathering are still not clear. In this study, poplar wood and moso bamboo were furfurylated and underwent artificial weathering. The surface chemical changes of the control and furfurylated wood and bamboo samples were examined using the attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The colour changes were also investigated by measuring CIELab parameters. Results demonstrated that the wood/bamboo surfaces showed decreased lightness and became reddish and yellowish after artificial weathering. Furfurylation endowed poplar wood and bamboo with improved stability of photo-discolouration. Weathering caused remarkable degradation of lignin in the control and furfurylated sample surfaces with decreased aromatic carbons and increased oxygenated carbons. The poly(furfuryl alcohol) in sample surfaces could also be oxidized during weathering. Compared with the furfurylated bamboo, the furfurylated poplar wood had higher stability of photo-degradation.

摘要

尽管糠化大大提高了木材和竹子的尺寸稳定性、硬度和耐生物降解性，但糠化对木材和竹子的耐候性的影响仍不清楚。在这项研究中，杨木和毛竹被糠化并进行了人工风化。使用衰减全反射傅里叶变换红外光谱 (ATR-FTIR) 和 X 射线光电子能谱 (XPS) 检查对照和糠化木材和竹子样品的表面化学变化。还通过测量 CIELab 参数来研究颜色变化。结果表明，木材/竹子表面在人工风化后亮度降低，呈红色和黄色。糠醛化赋予杨木和竹子以改善的光变色稳定性。风化导致对照和糠化样品表面中的木质素显着降解，芳香碳减少，氧化碳增加。样品表面的聚（糠醇）在风化过程中也可能被氧化。与糠化竹相比，糠化杨木具有更高的光降解稳定性。