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Colour Stability of Thermally Modified Wood during Short-Term Photodegradation

Tolvaj, László and Németh, Róbert and Pásztory, Zoltán and Bejó, László and Takáts, Péter (2014) Colour Stability of Thermally Modified Wood during Short-Term Photodegradation. BIORESOURCES, 9 (4). pp. 6644-6651. ISSN 1930-2126

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Abstract

Dry thermal treatments of wood samples were carried out at 160 and 200 °C. After each treatment, the samples were irradiated using a strong UV emitter mercury lamp, and the colour change was then evaluated. For control, untreated samples were also irradiated using the same mercury lamp. Results showed that the extractive content of the wood played an important role in the colour change not only during thermal treatment bu t also during light irradiation . It was found that, compared to the thermally untreated samples, the thermal tre atment at 200 °C reduced the red colour change due to photodegradation. The yellow colour change of photodegradation was hardly affected by the applied thermal treatments, showing that thermal treatments were not able to reduce the light degradation of lig nin. The applied treatments slightly stabilized the wood against the degrading effect of light. The wood treated at lower temperature (160 °C) had less colour change induced by the light source.

Item Type: Article
Subjects: Q Science / természettudomány > QC Physics / fizika
Q Science / természettudomány > QK Botany / növénytan
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 06 Nov 2014 10:56
Last Modified: 06 Nov 2014 10:56
URI: http://real.mtak.hu/id/eprint/18196

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