Chemistry of Weathering and Protection

Feist, William C.; Hon, David N.‐S.

doi:10.1021/ba-1984-0207.ch011

Cited by 266 publications

(225 citation statements)

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“…This was attributed to chemical changes which occurred, especially in lignin, due to photo-degradation resulting from UV exposure and, consequently, to a darkening of color on the wood (Peker et al 2012, Ozen et al 2014. The high negative values of ∆L* indicate the sensitivity of that wood type against UV radiation and the surface quality thereof (Feist and Hon 1984).…”

Section: Resultsmentioning

confidence: 99%

“…Feist and Hon (1984) reported that higher color changes were found in samples having higher lignin content. Lignin is the compound absorbing UV of 80 to 95% among the three main components of wood (Peker et al 2012).…”

Section: Universidad Del Bío -Bíomentioning

confidence: 97%

“…Lignin has aromatic, phenolic and carboxylic groups that absorb rays of different energy levels. Although cellulose is not sensitive to UV light of wavelengths longer than 340 nm (Feist and Hon 1984). Nevertheless, the roughness of color stabilized wood is a complex phenomenon because wood is an anisotropic and heterogeneous material.…”

Section: Universidad Del Bío -Bíomentioning

confidence: 99%

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Natural coloration of wood material by red beetroot (Beta vulgaris) and determination color stability under UV exposure

Yeniocak

Göktaş

Çolak

et al. 2015

Maderas, Cienc. tecnol.

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This study is aimed to develop an eco-friendly wood stained extracted from beetroot (Beta vulgaris) and determine the color stability of this stain to UV light irradiation. Natural dyestuff were extracted from beetroot by ultrasonic-assisted method and prepared from aqueous solution with ferrous sulphate, aluminum sulphate, copper sulphate and vinegar mordant mixes. Scots pine (Pinus sylvestris), oriental beech (Fagus orientalis), oak (Quercus petraea) and walnut (Juglans regia) wood specimens were used for the study. After treatment with stain, wood specimens were exposed to UV irradiation for periods of 50, 100 and 150 hours. Results showed that the color change values for all wood specimens colored with beetroot extract had better performance compared to synthetic dye. Beetroot extracts may be used as an upper surface dyestuff for indoor application and toys. Therefore, alternative to synthetic dyes more economical and eco-friendly, wood paints may be developed.

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Section: Resultsmentioning

confidence: 99%

Section: Universidad Del Bío -Bíomentioning

confidence: 97%

Section: Universidad Del Bío -Bíomentioning

confidence: 99%

See 1 more Smart Citation

Natural coloration of wood material by red beetroot (Beta vulgaris) and determination color stability under UV exposure

Yeniocak

Göktaş

Çolak

et al. 2015

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

show abstract

“…Light absorption by the wood causes the formation of free radicals and the initiation of photochemical reactions at the surface. These reactions eventually cause discoloration, and subsequently roughness and cracking of the wood surface (Feist and Hon 1984, Feist 1990, Anderson et al 1991, Williams et al 2001, Williams 2005, Evans et al 2005. Among wood's polymers, lignin is a UVabsorbent and the others (cellulose and hemicelluloses) have very little absorption (Norrstrom 1969, Williams 2010.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, light cannot penetrate the wood more than 200 µm. So, destructive reactions are limited to surface of the wood Hon 1984, Hon andShiraishi 2001), and wood can be protected by painting or coating with similar materials. Appearance of unprotected woods changes markedly in outdoor exposure within a few months.…”

Section: Introductionmentioning

confidence: 99%

Effects of oleothermal treatment and polydimethylsiloxane (PDMS) coating on natural weathering of beech and fir woods

Saei

Mohebby

Abdeh

2015

Maderas, Cienc. tecnol.

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Effects of natural weathering on oleothermally treated wood and coated with an organic silicone compound were studied. Slats of beech and fir woods were cut in sizes of 20×10×1 cm. The slats were treated by soybean oil at 230˚C for 1 h. Then, the half of the untreated and oleothermally treated slats were coated with polydimethylsiloxane (PDMS) and the rest of them were considered as control. All slats were hanged in 45˚ angle at the southwest (SW) direction for 90 days. They were analyzed for color changes, roughness, and contact angle properties at 30-day intervals. Results showed that the oleothermal treatment of wood reduced discoloration of fir samples against natural weathering; however, the reducing effect was lower in the Beech samples. This treatment also reduced the surface roughness of the fir samples during weathering while it increased the surface roughness of beech. Wettability of the samples in both species, before and after weathering, was reduced by the oleothermal treatment. Results also revealed that coating of the wood surface with PDMS does not prevent the discoloration and surface roughness against weathering. Nevertheless, the coating could considerably decrease the hydrophilicity of the woods even after weathering.

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Wood and Wood Fiber Characteristics: Moisture, Biological, Thermal and Weathering

Rowell

2016

Lignocellulosic Fibers and Wood Handbook

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Chemistry of Weathering and Protection

Cited by 266 publications

References 1 publication

Natural coloration of wood material by red beetroot (Beta vulgaris) and determination color stability under UV exposure

Natural coloration of wood material by red beetroot (Beta vulgaris) and determination color stability under UV exposure

Effects of oleothermal treatment and polydimethylsiloxane (PDMS) coating on natural weathering of beech and fir woods

Wood and Wood Fiber Characteristics: Moisture, Biological, Thermal and Weathering

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