Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

Yalçın, Mesut; Pelit, Hüseyin; Akçay, Çağlar

doi:10.1111/cote.12287

Cited by 19 publications

(13 citation statements)

References 24 publications

(54 reference statements)

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“…After accelerated weathering, in terms of varnish type, the lowest colour change values were obtained with PV, followed by water‐based varnish and then CV. The authors also reported that PV had highest surface hardness, followed by water‐based and cellulosic coatings . Improving the durability and surface performance of wood with various applications for weathering conditions is important for its value.…”

Section: Introductionmentioning

confidence: 94%

“…Yalcin et al 14 investigated the surface properties of Oriental beech wood samples treated with tannins and TN-E before PV, water-based varnish and cellulosic varnish (CV) after accelerated weathering. The authors found that total colour changes increased in both the control specimens and the impregnated specimens exposed to weathering periods ranging from 100 to 300 hours.…”

mentioning

confidence: 99%

“…The authors also reported that PV had highest surface hardness, followed by water-based and cellulosic coatings. 14 Improving the durability and surface performance of wood with various applications for weathering conditions is important for its value.…”

mentioning

confidence: 99%

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Accelerated weathering performance of Scots pine preimpregnated with copper‐based chemicals before varnish coating Part:1 coated with cellulosic and polyurethane varnishes

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Baysal

Türkoğlu

et al. 2019

Coloration Technology

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This study aimed to determine the effect of accelerated weathering on gloss, surface hardness and colour changes of Scots pine (Pinus sylvestris L.). Test samples were impregnated with Adolit KD‐5, Wolmanit CX‐8 and Celcure AC‐500 covered with cellulosic and polyurethane varnishes. The results showed that the values of surface hardness and gloss increased after accelerated weathering. While the surface hardness of Scots pine was increased for impregnated and polyurethane‐coated varnish, it decreased for impregnated and cellulosic varnish‐coated Scots pine after 1000 hours of accelerated weathering exposure. Copper‐based chemical impregnation and varnish coating developed the gloss of Scots pine specimens relative to the surface characteristics observed in single‐coated Scots pine specimens. While the most appropriate chemical was Celcure AC‐500 for surface hardness, it was Adolit KD‐5 for the gloss of Scots pine after 1000 hours of accelerated weathering exposure. Wood specimens impregnated prior to the application of varnish were more effective in stabilising the colour of Scots pine than Scots pine only coated with varnish. Polyurethane varnish‐treated Scots pine showed better colour stability for each partial and total accelerated weathering exposure period. The total colour changes were lowest for polyurethane varnish‐coated Scots pine impregnated with Celcure AC‐500 after 1000 hours of accelerated weathering exposure.

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Section: Introductionmentioning

confidence: 94%

mentioning

confidence: 99%

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Accelerated weathering performance of Scots pine preimpregnated with copper‐based chemicals before varnish coating Part:1 coated with cellulosic and polyurethane varnishes

Gündüz

Baysal

Türkoğlu

et al. 2019

Coloration Technology

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“…The results are variable, but the use of a combination of UV-stabilizers and HALS [ 10 , 42 ] and TiO 2 or ZnO nanoparticles [ 49 , 50 , 51 ] seems to be the most effective. In addition, it is necessary to consider the fact that the kind of underlying wood species, and in particular the content of specific extractives [ 52 ], significantly affects the reaction to the impacting UV radiation [ 53 , 54 , 55 ] and also reacts differently with the additives and polymeric foundations contained in the coatings [ 4 , 33 , 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

Colour Stabilization of Oak, Spruce, Larch and Douglas Fir Heartwood Treated with Mixtures of Nanoparticle Dispersions and UV-Stabilizers after Exposure to UV and VIS-Radiation

et al. 2018

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Colour changes and associated wood degradation in exterior and interior applications influenced by ultraviolet (UV) and visible radiation (VIS) decreases the aesthetic value of the products and shortens the overall life of transparent coatings. The aim of the paper is to achieve colour stabilization of oak, larch, Douglas fir and spruce heartwood via surface treatment with UV stabilizers, hindered amine light stabilizers (HALS), nanoparticles TiO2, ZnO, and mixtures thereof, during exposure to UV and VIS radiation. Colour changes were evaluated during accelerated artificial ageing testing in Xenotest. The distinctly individual character of colour changes in surface treatments due to the underlying wood species was confirmed. A synergistic effect was found when using a combination of active substances compared to substances used individually. The mixture of benzotriazoles with HALS (Tinuvin 5151) in combination with TiO2 and ZnO nanoparticles was confirmed as one of the most effective treatments for colour stabilization of wood due to UV and VIS spectrums.

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“…Le vieillissement artificiel ou accéléré influe sur la couleur du bois traité ou non traité par finition [12][13][14][15][16][17][18][19].…”

Section: Introductionunclassified

Effect of artificial aging at QUV on the color of finish treated woods of Pinus sylvestris and Quercus robur

et al. 2018

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Abstract. The durability of exterior finishes on wood is not assured with the systems currently used. Thus, the objective of this study was to evaluate the color change of the finishes applied to wood, the most commercialized in Morocco, in order to find the wood-finishing couple that has the best durability in outdoor use. QUV accelerated aging tests were carried out during 2016 hours, according to the standard (NF 927-6 2006), on Scots pine (Pinus sylvestris) and Pedunculate oak (Quercus robur) coated with four finishes (two polyurethane finishes F 1 and F 2 and two acrylic finishes F 3 and F 4 ). Colorimetric measurements in color system CIELab: Gloss (L*), green-red (a*) and blue-yellow (b*) coordinates, color saturation (C*) and tone angle ( H*) were performed using an X-Rite Model SP62 spectrophotometer before and at the end of the QUV accelerated aging treatment. The results showed that QUV aging caused a decrease in the L* value and a change in the surface color of all the finishing pairs studied. For wood / finishing couples with Quercus robur as a wooden support, the couple Quercus robur / F3 has the best resistance to color change, while for couples wood / finish with Pinus sylvestris as a wooden support, the couple Pinus sylvestris / F1 has the best resistance to color change.Key words: Wood, finish, gloss, color, accelerated aging, QUV.Résumé. La durabilité des finitions extérieures sur le bois n'est pas assurée avec les systèmes employés actuellement. Ainsi, l'objectif de cette étude était d'évaluer le changement de couleur des finitions appliquées aux bois, les plus commercialisés au Maroc, dans le but de trouver le couple bois-finition qui présente la meilleure durabilité en utilisation extérieure. Des tests de vieillissement accéléré au QUV ont été réalisés pendant 2016 heures, selon la norme (NF 927-6 2006), sur le pin sylvestre (Pinus sylvestris) et le chêne pédonculé (Quercus robur) revêtus de quatre finitions (deux finitions polyuréthanes F1 et F2 et deux finitions acryliques F3 et F4). Les mesures colorimétriques dans le système de couleur CIELab: La brillance (L*), les coordonnées vert-rouge (a*) et bleu-jaune (b*), la saturation des couleurs (C*) et l'angle de tonalité (H*) ont été réalisées à l'aide d'un spectrophotomètre X-Rite Model SP62, avant et à la fin du traitement de vieillissement accéléré au QUV. Les résultats ont montré que le vieillissement au QUV a provoqué une diminution de la valeur de L* et une modification de la couleur de surface de tous les couples de finition étudiés. Pour les couples bois/finition avec le Quercus robur comme support en bois, le couple Quercus robur / F 3 présente la meilleure résistance au changement de couleur, alors que pour les couples bois / finition avec le Pinus sylvestris comme support en bois, le couple Pinus sylvestris / F 1 présente la meilleure résistance au changement de couleur.

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Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

Cited by 19 publications

References 24 publications

Accelerated weathering performance of Scots pine preimpregnated with copper‐based chemicals before varnish coating Part:1 coated with cellulosic and polyurethane varnishes

Accelerated weathering performance of Scots pine preimpregnated with copper‐based chemicals before varnish coating Part:1 coated with cellulosic and polyurethane varnishes

Colour Stabilization of Oak, Spruce, Larch and Douglas Fir Heartwood Treated with Mixtures of Nanoparticle Dispersions and UV-Stabilizers after Exposure to UV and VIS-Radiation

Effect of artificial aging at QUV on the color of finish treated woods of Pinus sylvestris and Quercus robur

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