Color and FTIR Analysis of Chemical Changes in Beech Wood (Fagus sylvatica L.) after Light Steaming and Heat Treatment in Two Different Environments

Timar, Maria Cristina; Varodi, Anca Maria; Hacibektasoglu, Murat; Câmpean, Mihaela

doi:10.15376/biores.11.4.8325-8343

Cited by 33 publications

(11 citation statements)

References 36 publications

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“…The first change that indicates the wood degradation is identified by lignin degradation, through quinone compounds formed responsible for a yellowed surface. These compounds increase the surface roughness, the chemical bonds are weaker, and macroscopic cracks are formed [52]. The treatment of wood with different consolidants causes the alteration of the spectra aspect by the appearance or intensification of some characteristic absorption bands.…”

Section: Study Casementioning

confidence: 99%

“…FTIR analysis can be used for solid wood samples being a fast-spectroscopic method and requiring an easy sample preparation. Information regarding the wood degradation can be obtained based on composition, functional groups, and molecular structure [52,58,59]. The degradation mechanism depending on the wood chemical composition (hemicellulose, lignin, and extractives content) is reflected in the chemical changes regarding the reduction of OH groups, increasing of unconjugated carbonyl groups, and formation of aromatic carbonyl conjugated groups as quinoid structures [60] ( Table 1) (Figure 3).…”

Section: Study Casementioning

confidence: 99%

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Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Ion¹,

Grigorescu²,

Iancu³

et al. 2018

New Uses of Micro and Nanomaterials

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The complex methods of diagnosis investigation of the wood artifacts state and proper materials for their protection against decay are very important goals in cultural heritage. This chapter focuses on the recent trends in micro-and nanostructured polymer systems for application in cultural heritage and on wood preservation, especially. The synthesis, properties, and applications, as well as the relevant analysis techniques to reveal the structures and properties of polymer systems, are discussed, too. To overcome the specific problems that exist for wood artifacts, some aspects should be treated: effects of the environmental factors, as moisture and pollutant absorption into the wood fibers, over-exposure effect of sun or artificial light sources, biological attack of different microorganisms, and the effects of the protective and decorative coatings.

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Section: Study Casementioning

confidence: 99%

Section: Study Casementioning

confidence: 99%

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Ion¹,

Grigorescu²,

Iancu³

et al. 2018

New Uses of Micro and Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The thermal treatment of wood with saturated water vapour is traditionally used in the woodworking industry, for example, in the manufacture of furniture components with solid wood bending, lamination of veneer (laminated bending), interior tiling, and flooring. The thermally-based modification treatment is also accompanied by the chemical reactions of the cell-wall components (polysaccharides, lignin, and extractives), which cause changes in the colour of the wood [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Colour Stabilisation of Surface of Four Thermally Modified Woods with Saturated Water Vapour by Finishes

Vidholdová

Slabejová

2021

Polymers

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This paper deals with the influence of the type of transparent surface finish on the change of colour of the surfaces of native wood, and thermally treated wood, with saturated water vapour. In the experiment, alder, European beech, Paper birch, and Norway maple wood were thermally treated at a temperature of 135 °C under saturated water vapour for six hours. Three various types of surface finishes (acrylic-polyurethane, polyacrylic and aldehyde resin, and alkyd resin) were applied onto the wood surfaces. The colours of the surfaces in the system, CIE L*a*b* (lightness, coordinates a* and b*, chroma and hue angle), were measured during finishing and natural ageing behind glass windows in an interior, over a period of 60 days. The results show that the changes in the yellowness index, and the total colour differences after the application of individual surface finishes to wood species, changed because of sunlight exposure. Moreover, it is clear that different wood finishes behaved differently on all of the wood species. An analysis is presented in this paper.

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“…The thermal treatment of wood is an ecological method, as shown by References [3][4][5], which aims to temporarily or permanently modify the physical and mechanical properties of wood. One of the lasting physical changes is the color change of the wood [6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Impact of Sycamore Maple Thermal Treatment on a Granulometric Composition of Chips Obtained due to Processing on a CNC Machining Mentre

Kminiak

Dzurenda

2019

Sustainability

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This article deals with a granulometric composition of chips from the milling process of native and thermal treatment maple cuttings on a 5-axial Computer numerical control (CNC) machining center SCM Tech Z5. The aim of this article was to determine the changes in the granulometric composition of chips due to the thermal treatment of wood and to assess the potential risk of the creation of harmful dust fractions. Cuttings were milled with a shank cutter with exchangeable razor blades at feed speed vf = 1 ÷ 5 m·min−1 and material removal e = 3 mm. The thermal treatment in order to modify the color of the maple wood was done with water vapour at temperatures of tI = 112.5 ± 2.5 °C for a period of τ = 5.5 h (Mode I), tII = 127.5 ± 2.5 °C for a period of τ = 6.5 h (Mode II), and tIII = 137.5 ± 2.5 °C for a period of τ = 7.5 h (Mode III). The granulometric composition of the chips was detected by sifting. A granulometric analysis of the chips provided that more than 2/3 of the produced chips are a coarse fraction consisting of flat chips with dimensions over 1 mm. Dust fractions smaller than 500 μm form isometric grains, i.e., chips having approximately the same size in all three dimensions. Inhalable dust particles, smaller than 125 μm, do not exceed a 2.5% share. The granulometric analysis of chips shows that the thermal treatment of maple wood does not create respirable fractions, and therefore, the thermal treatment of the wood does not have a negative impact on the living and working environments.

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Color and FTIR Analysis of Chemical Changes in Beech Wood (Fagus sylvatica L.) after Light Steaming and Heat Treatment in Two Different Environments

Cited by 33 publications

References 36 publications

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Colour Stabilisation of Surface of Four Thermally Modified Woods with Saturated Water Vapour by Finishes

Impact of Sycamore Maple Thermal Treatment on a Granulometric Composition of Chips Obtained due to Processing on a CNC Machining Mentre

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