Wood color modification with iron salts aqueous solutions: effect on wood grain contrast and surface roughness.

IF 2.2 3区 农林科学 Q2 FORESTRY Holzforschung Pub Date : 2023-05-25 DOI:10.1515/hf-2022-0189
Roberta Dagher, Tatjana Stevanovic, Véronic Landry
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Abstract

Wood is a biosourced material with unique aesthetic features due to its anatomy and chemical composition. White oak wood surface color can be modified with the use of iron salts, which react with wood phenolic extractives, present as free molecules in wood porous structure. The impact of modifying wood surface color with iron salts on the final appearance of wood, including its color, grain contrast and surface roughness, was evaluated in this study. Results showed that following the application of iron (III) sulphate aqueous solutions on white oak wood surface, its roughness increased, which is due to grain raising after wetting of wood surface. The color modification of wood surface with iron (III) sulphate aqueous solutions was compared with a non-reactive water based blue stain. The contrast associated to wood grain that was expressed by the standard deviation of luminance values in wood images, also increased after application of the iron (III) sulphate aqueous solution on white oak wood surface. The comparison of contrast changes showed that wood samples stained with iron (III) sulphate on their curved surface had the highest increase in grain contrast compared to iron-stained wood showing the straight grain and to wood surfaces colored by a non-reactive water-based stain for both curved and straight grains.

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铁盐水溶液对木色的改性:对木纹对比度和表面粗糙度的影响。
木材是一种生物材料,由于其解剖结构和化学成分而具有独特的美学特征。使用铁盐可以改变白橡木的表面颜色,铁盐与木材酚类提取物反应,在木材多孔结构中以自由分子的形式存在。本研究评估了用铁盐修饰木材表面颜色对木材最终外观的影响,包括其颜色,颗粒对比度和表面粗糙度。结果表明:在白栎木材表面施用硫酸铁溶液后,木材表面粗糙度增大,这是由于木材表面湿润后产生的颗粒升高所致。比较了硫酸铁(III)水溶液对木材表面的着色效果和非活性水基蓝色染色剂的效果。在白栎木表面使用硫酸铁水溶液后,木材图像中亮度值的标准差所表示的木纹对比度也有所增加。对比变化的比较表明,与显示直纹的铁染色木材和显示弯曲和直纹的非活性水基染色木材表面相比,在其弯曲表面上染色硫酸铁(III)的木材样品具有最高的纹理对比度增加。
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来源期刊
Holzforschung
Holzforschung 工程技术-材料科学:纸与木材
CiteScore
4.60
自引率
4.20%
发文量
83
审稿时长
3.3 months
期刊介绍: Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.
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