Photodegradation of timber of three Hardwood species caused by different light sources

L. Tolvaj, Dénes Varga

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In this study, resistance of black locust, beech and poplar wood to photodegradation was tested, applying sunlight, a xenon lamp and a mercury vapour lamp. The irradiation time was 200 hours for sunlight and the xenon light and 20 hours for the mercury light. The changes were monitored by colour measurements and infrared spectroscopy. The colour change of black locust was more intensive at the beginning of the irradiation than that of the beech and poplar. The degradation of aromatic structure of lignin (absorbing at 1510 and 1596 cm-1) in black locust was minor compared to the same changes of beech and poplar during the first 10 hours. The mercury lamp induced more intensive changes both in colour and in infrared spectrum than the other two light sources. The results show that the high extractive content of black locust absorbs a considerable amount of light radiation protecting the main chemical components of wood.

Original languageEnglish
Pages (from-to)145-158
Number of pages14
JournalActa Silvatica et Lignaria Hungarica
Volume8
Issue number1
DOIs
Publication statusPublished - 2012

Fingerprint

Robinia pseudoacacia
locust
photolysis
photodegradation
hardwood
timber
mercury
Fagus
xenon
color
irradiation
solar radiation
infrared spectroscopy
vapors
lignin
aromatic compounds
degradation
lamp

Keywords

  • Colour change
  • Infrared spectrum
  • Mercury lamp
  • Photodegradation
  • Wood
  • Xenon lamp

ASJC Scopus subject areas

  • Forestry

Cite this

Photodegradation of timber of three Hardwood species caused by different light sources. / Tolvaj, L.; Varga, Dénes.

In: Acta Silvatica et Lignaria Hungarica, Vol. 8, No. 1, 2012, p. 145-158.

Research output: Contribution to journalArticle

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