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首页> 外文会议>Optics for arts, architecture, and archaeology IV >Application of spectroscopic techniques for the study of the surface changes in poplar wood and possible implications in conservation of wooden artefacts
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Application of spectroscopic techniques for the study of the surface changes in poplar wood and possible implications in conservation of wooden artefacts

机译：光谱技术在杨木表面变化研究中的应用及其对木制手工艺品保护的启示

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摘要

The aim of this work is to study the surface modifications of poplar (Populus spp.) wood by reflectance spectrophotometry and Fourier Transform Infrared (FT-IR) spectroscopy in order to understand the mechanisms that cause the changes and to suggest possible solutions to avoid the degradation phenomena. Since colour changes on wood surfaces are due to photo degradation of its chemical constituents, the study of the relationship between CIELAB colour changes and changes in chemical composition due to irradiation is of practical importance both in cultural heritage and in contemporary artefacts and objects. Concerning the surface protection of wood, starting from the results obtained by testing different commercial products, the attention has been focused on Linfoil~®, a novel organic preservative/consolidant product that seems to attract a great interest in the field of conservation of wooden artefacts. Linfoil~® was chosen and analysed in order to understand its composition and its time stability using reflectance spectrophotometry, FT-IR spectroscopy and analytical pyrolysis coupled to a gas chromatographic-mass spectrometric system. Colour monitoring allowed to find that wood surface colour undergoes an important variation due to photo-irradiation, occurring within the first 24 hours and mainly due to L~* decrease and b~* increase. Though Linfoil~® treatment modifies wood colour, nevertheless it seems to protect wood surface by reducing the yellowish. FT-IR spectroscopy allowed to investigate the rate of photo-degradation of wood surface due to lignin oxidation. The most important result is that a correlation of the colour changes may be derived with the photo-degradation of lignin obtained by FT-IR analysis.
机译：这项工作的目的是通过反射分光光度法和傅立叶变换红外（FT-IR）光谱学研究杨木（Populus spp。）木材的表面改性，以便了解引起这种变化的机理并提出可能的解决方案，以避免退化现象。由于木材表面的颜色变化是由于其化学成分的光降解引起的，因此研究CIELAB颜色变化与辐射引起的化学成分变化之间的关系在文化遗产以及当代文物和物体中都具有实际意义。关于木材的表面保护，从通过测试不同的商业产品获得的结果开始，注意力一直集中在Linfoil〜®上，这是一种新型的有机防腐剂/固结剂产品，似乎在木制制品的保存领域引起了极大的兴趣。 。选择Linfoil®进行分析是为了了解其组成和时间稳定性，方法是使用反射分光光度法，FT-IR光谱和分析热解结合气相色谱-质谱系统。色彩监测可以发现，木材表面的颜色由于在最初的24小时内发生的光辐照而发生了重要的变化，主要是由于L〜*降低和b〜*升高。尽管Linfoil〜®处理可以改变木材的颜色，但是它似乎可以通过减少泛黄来保护木材表面。 FT-IR光谱法可以研究木质素氧化引起的木材表面光降解速率。最重要的结果是颜色变化的相关性可能与通过FT-IR分析获得的木质素的光降解有关。

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  • 来源
    《Optics for arts, architecture, and archaeology IV》|2013年|879014.1-879014.14|共14页
  • 会议地点 Munich(DE)
  • 作者

    C. Pelosi; G. Agresti; L. Calienno; A. Lo Monaco; R. Picchio; U. Santamaria; V. Vinciguerra;

  • 作者单位

    Department of Cultural Heritage Sciences (DISBEC), University of Tuscia, Largo dell'Universita 01100 Viterbo, Italy;

    Department of Cultural Heritage Sciences (DISBEC), University of Tuscia, Largo dell'Universita 01100 Viterbo, Italy;

    Department of science and technology for Agriculture, Forests, Nature and Energy (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy;

    Department of science and technology for Agriculture, Forests, Nature and Energy (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy;

    Department of science and technology for Agriculture, Forests, Nature and Energy (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy;

    Department of Cultural Heritage Sciences (DISBEC), University of Tuscia, Largo dell'Universita 01100 Viterbo, Italy;

    Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy;

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  • 正文语种 eng
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  • 关键词

    poplar wood; photo-degradation; Fourier Transform Infrared spectroscopy; reflectance spectrophotometry; analytical pyrolysis;

    机译：杨木光降解傅里叶变换红外光谱反射分光光度法分析热解;

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