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首页> 外文期刊>Journal of spectroscopy >Surface Investigation of Photo-Degraded Wood by Colour Monitoring, Infrared Spectroscopy, and Hyperspectral Imaging
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Surface Investigation of Photo-Degraded Wood by Colour Monitoring, Infrared Spectroscopy, and Hyperspectral Imaging

机译：通过颜色监测，红外光谱和高光谱成像对光降解木材进行表面研究

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摘要

The aim of this investigation is to study the changes occurring on the surface of poplar wood exposed to artificial irradiation in a Solar Box. Colour changes were monitored with a reflectance spectrophotometer. Surface chemical modifications were evaluated by measuring the infrared spectra. Hyperspectral imaging was also applied to study the surface wood changes in the visible-near infrared and the short wave infrared wavelength ranges. The data obtained from the different techniques were compared to find the possible correlations in order to evaluate the applicability of the Hyperspectral imaging to investigate wood modifications in a non-invasive modality. The study of colour changes showed an important variation due to photo-irradiation which is the greatest change occurring within the first 24 hours. Infrared spectroscopy revealed that lignin degrades mainly in the first 48 hours. Concerning Hyperspectral imaging, the spectral features in the visible-near infrared range are mainly linked to the spectral shape, whereas in the short wave infrared cellulose and lignin affect shape and reflectance levels. The proposed approach showed that a correlation can be established between colour variation and wood degradation in the visible-near infrared range; furthermore in the short wave infrared region surface chemical changes can be assessed.
机译：这项研究的目的是研究在太阳箱中暴露于人工辐射的杨木表面的变化。用反射分光光度计监测颜色变化。通过测量红外光谱评估表面化学改性。高光谱成像还被用于研究可见近红外和短波红外波长范围内的木材表面变化。比较了从不同技术获得的数据以找到可能的相关性，以评估高光谱成像技术在非侵入性方式下研究木材改性的适用性。对颜色变化的研究表明，由于光辐照，存在重要的变化，这是前24小时内发生的最大变化。红外光谱显示木质素主要在前48小时内降解。关于高光谱成像，可见-近红外范围内的光谱特征主要与光谱形状相关，而在短波中，红外纤维素和木质素会影响形状和反射率水平。所提出的方法表明，可以在可见光-近红外范围内建立颜色变化与木材降解之间的相关性。此外，在短波红外区域，可以评估表面化学变化。

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