Características da cor da madeira de pinus afetada por compressão térmica

Atik, Celil; Candan, Zeki; Öner, Ünsal

doi:10.5902/198050989291

Cited by 8 publications

(7 citation statements)

References 14 publications

(9 reference statements)

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“…Compression ratio has little effect compared to compression temperature on the discolouration of specimens. Similar results were reported by Atik et al [23] and Bekhta et al [2]. L* value of pine and beech wood specimens decreased significantly depending on increase of termal post-treatment temperature and specimens darkened.…”

Section: Resultssupporting

confidence: 90%

“…Sometimes, color changes arose as a result of thermal treatment may be more preferred for customers. This case especially can be seen on the wood species which have light colors such as pine, beech, poplar [22,23]. Color is an important factor both in terms of aesthetic properties and economic indicators affecting the pricing of the finished product.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Yoğunlaştirilmiş Ve Termal İşlemli̇ Kayin Ve Çam Odunlarinin Renk Özelli̇kleri̇

Pelit

2016

Mugla Journal of Science and Technology

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Effect of thermo-mechanical densification and thermal post-treatment on the colour parameters (L*, a*, b* and ΔE*) of beech (Fagus oriantalis L.) and pine (Pinus sylvestris L.) wood species were investigated. Wood specimens were densified at temperatures of 100 or 150 °C and compression ratios of 20% or 40%. Then, thermal post-treatment was applied to the specimens during 2 h at 190, 200, and 210 °C to provide dimensional stability in densified specimens. The colour change of the specimens was evaluated by CIEL*a*b* colour coordinate systems. The results showed that, the colour of the densified specimens at higher temperature and compression ratio was more changed. The compression temperature was more effective compared to compression ratio on the colour change of specimens. After the thermal post-treatment, colour characteristics of specimens have changed significantly depending on the increase in the treatment temperature, and specimens darkened. Densification processes has little effect on colour changes of the thermally post-treated specimens. The colour of pine specimens compared with the beech specimens more affected by the densification and thermal treatment applications. Morever, the change in a* value of specimens is more evident than the change in L* or b* values.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Yoğunlaştirilmiş Ve Termal İşlemli̇ Kayin Ve Çam Odunlarinin Renk Özelli̇kleri̇

Pelit

2016

Mugla Journal of Science and Technology

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“…Color properties have an importance by costumers. Thermally compressing process significantly influenced the color parameters of pine wood materials (Atik et al 2013). Thermal modification method affects performance properties of the paulownia (Candan et al 2013a) and poplar (Candan et al 2013b) wood materials.…”

Section: Introductionmentioning

confidence: 99%

Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Gönültaş

Candan

2018

Maderas, Cienc. tecnol.

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In this study, the change in the chemical properties of the thermally modified eucalyptus (Eucalyptus camaldulensis) wood boards were examined by wet chemical analysis and FTIR spectroscopy. The eucalyptus wood boards were modified with a laboratory type hot-press for four different groups at press pressures of 2 or 4 MPa and temperatures of 150°C or 180°C and compared to untreated control. After this, hot water, 1% NaOH, ethanol-cyclohexane, ethanol, and methanol-water solubility values were determined for the treated samples. In addition, the content of klason lignin, acid soluble lignin, holocellulose, and α-cellulose were investigated. The solubility values (except for the ethanol solubility) increased in the modified wood when compared to the untreated control. A decrease in the content of acid soluble lignin, holocellulose and α-cellulose was observed while the content of klason lignin in the modified wood was increased. According to the FTIR analysis results, significant changes were observed in the spectra of the modified samples. These findings were in agreement with the results of wet chemical analysis.

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“…Simultaneously, in England, similar products (plywood) were also produced by Jicwood and Jablo. Two other important methods in densifying wood material are ''Compreg'' and ''Staypak'' developed in forestry laboratories in the USA [ 13,14,29,30]. Compreg is obtained by applying pressure to wood while resin in synthetic resin treated wood hardens.…”

Section: Historical Processmentioning

confidence: 99%