Dudiak Michal, Dzurenda Ladislav, Kučerová Viera
Faculty of Wood Sciences and Technology, Technical University in Zvolen, T.G. Masaryka 24, 96001 Zvolen, Slovakia.
Polymers (Basel). 2022 Apr 21;14(9):1697. doi: 10.3390/polym14091697.
This paper presents the differences in the color changes of unsteamed and steamed beech wood ( L.) caused by long-term exposure to sunlight on the surface of wood in interiors for 36 months. The light white-gray color of the yellow tinge of native beech wood darkened under the influence of sunlight, and the wood took on a pale brown color of yellow tinge. The degree of darkening and browning is quantified by the value of the total color difference ∆ = 13.0. The deep brown-red color of steamed beech under the influence of sunlight during the exposure brightened, and the surface of the wood took on a pale brown hue. The degree of lightening of the color of steamed beech wood in the color space CIE is quantified by the value of the total color difference ∆ = 7.1. A comparison of the color changes of unsteamed and steamed beech wood through the total color difference ∆ due to daylight shows that the surface of steamed beech wood shows 52.2% smaller changes than unsteamed beech wood. The lower value of the total color difference of steamed beech wood indicates the fact that steaming of beech wood with saturated water steam has a positive effect on the color stability and partial resistance of steamed beech wood to the initiation of photochemical reactions induced by UV-VIS wavelengths of solar radiation. Spectra ATR-FTIR analyses declare the influence of UV-VIS components of solar radiation on unsteamed and steamed beech wood and confirm the higher color stability of steamed beech wood.
本文介绍了未蒸煮和蒸煮过的山毛榉木材（L.）在室内木材表面长期暴露于阳光下36个月所引起的颜色变化差异。天然山毛榉木材黄色调的浅白灰色在阳光影响下变深，木材呈现出浅黄色调的浅棕色。颜色变深和变棕的程度通过总色差∆值量化为13.0。暴露期间，蒸煮过的山毛榉在阳光影响下的深棕红色变亮，木材表面呈现出浅棕色色调。蒸煮过的山毛榉木材在CIE颜色空间中的颜色变亮程度通过总色差∆值量化为7.1。通过由于日光导致的总色差∆对未蒸煮和蒸煮过的山毛榉木材的颜色变化进行比较表明，蒸煮过的山毛榉木材表面的变化比未蒸煮的山毛榉木材小52.2%。蒸煮过的山毛榉木材总色差较低的值表明，用饱和水蒸气蒸煮山毛榉木材对其颜色稳定性以及对由太阳辐射的紫外-可见波长引发的光化学反应的部分抗性有积极影响。衰减全反射傅里叶变换红外光谱（ATR-FTIR）分析揭示了太阳辐射的紫外-可见成分对未蒸煮和蒸煮过的山毛榉木材的影响，并证实了蒸煮过的山毛榉木材具有更高的颜色稳定性。
