Natural and artificial ageing of spruce wood as observed by FTIR-ATR and UVRR spectroscopy
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Christelle Ganne-Chédeville
,
Anna-Stiina Jääskeläinen
Abstract
Spruce samples, naturally aged for 200, 400 and 500 years, artificially aged by a hydrothermal treatment (at 180, 160 or 130°C, relative air humidities of 14%, 40%, or 60% and for treatment times between 1 to 50 h), as well as reference samples, were analysed by Fourier transform infrared spectroscopy (FTIR) attenuated total reflection (FTIR-ATR) and ultraviolet resonance Raman (UVRR) spectroscopy. Natural ageing mostly affected the hemicelluloses and lignin, as observed from the FTIR-ATR and UVRR spectra, respectively. The UVRR spectra of the same samples after acetone extraction indicated that lignin was partially degraded and quinone structures were possibly formed. Artificial ageing at 160°C showed a significant change in the lignin structure, a well-known effect in the thermal treatment of wood, whereas treatment at 130°C did not alter the wood structure to any significant extent. Principal component analysis of the UVRR spectra confirmed that the spectra of artificially aged wood up to 160°C are dissimilar to naturally aged wood and which are also dissimilar to unaged wood.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Original Papers
- Oxidative stabilisation of kraft lignin for carbon fibre production
- Antithrombotic properties of sulfated wood-derived galactoglucomannans
- Recycling potential of unbleached and bleached chemical pulps from juvenile and mature wood of Populus deltoides
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- Identification and functional characterization of a sesquiterpene synthase gene from Eleutherococcus trifoliatus
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- Changes in microstructure and stiffness of Scots pine (Pinus sylvestris L) sapwood degraded by Gloeophyllum trabeum and Trametes versicolor – Part II: Anisotropic stiffness properties
- Off-axis Young’s modulus and off-axis shear modulus of wood measured by flexural vibration tests
- Empirical models for radial and tangential fibre width in tree rings of Norway spruce in north-western Europe
- Automatic grain texture analysis using integral transforms
- The fungal resistance of wood modified with glutaraldehyde
- Relative fungal efficacy results from the soil block test with a long incubation period of three commercial copper wood preservatives
- Uneven distribution of preservative in kiln-dried sapwood lumber of Scots pine: Impact of wood structure and resin allocation
- Utilization of surfactants for consolidation of wooden work of art
- Screening for xylanase and β-xylosidase production from wood-inhabiting Penicillium strains for potential use in biotechnological applications
- Short Note
- Furfuryl alcohol impregnation for improved plasticization and fixation during the densification of wood
- Meetings
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