Journals / Bartın Orman Fakültesi Dergisi / 2021 / Cilt: 23 - Sayı: 1

The Effect of Different Aging Conditions on Color Change of Some Wood Species in ThermoWood® Products

Farklı Yaşlandırma Şartlarının Bazı Ağaç Türlerinin ThermoWood® Ürünlerinde Renk Değişimine Etkisi

Pages
104–118
Publication Date
2021-04-15
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

According to the results of the study, it can be said that one of the most effective measures to be taken against color change in outdoor use of heat-treated wood materials is to use SRV.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, mechanical properties such as static bending resistance and elastic modulus of elasticity in static bending with physical properties such as density were investigated in heat-treated wood species.
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Key Findings & Data:The color change from the physical properties was determined separately after natural and accelerated weathering in the test samples on which the surface treatment was applied.
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Conclusion & Impact:According to the results of the study, it can be said that one of the most effective measures to be taken against color change in outdoor use of heat-treated wood materials is to use SRV.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:ThermoWood® · heat treatment · water-based colored varnish

Abstract

In this study, mechanical properties such as static bending resistance and elastic modulus of elasticity in static bending with physical properties such as density were investigated in heat-treated wood species. The color change from the physical properties was determined separately after natural and accelerated weathering in the test samples on which the surface treatment was applied. Firstly, study trees which naturally grown in Turkey were selected aspen (Populus tremula-TK), ash (Fraxinus angustifolia-DYD), spruce (Picea orientalis-DL), and fir (Abies bornmülleriana-UG). Subsequently, they were subjected to heat treatment with the ThermoWood® method. Afterward, test samples for oven-dry density (TQM), air-dry density (HKY) and static bending resistance (ED), and static bending elasticity modulus (EM) test samples for DYD and UG, as well as test samples to be weathering from all tree species were prepared. Surface treatment was applied to the weathering test samples with a water-based varnish (SBV) with three different contents: one-component (STB), two-component (SÇB) and colored (SRV). Then, natural weathering (DY) for 190 days and accelerated weathering (QUV) for 336 hours were performed on the samples. After weathering tests, the smallest values in SRV were obtained. According to the results of the study, it can be said that one of the most effective measures to be taken against color change in outdoor use of heat-treated wood materials is to use SRV. On the other hand, it was determined that the density values and static bending resistance (ED) decreased and the elastic modulus (EM) value in static bending increased in HT test samples compared to the control samples (K).

Özet

Bu çalışmada ısıl işlem uygulanmış ağaç türlerinde yoğunluk ve renk değişimi gibi fiziksel, statik eğilme direnci ve statik eğilmede elastikiyet modülü gibi mekanik özellikler araştırılmıştır. Fiziksel özelliklerden renk değişimi üst yüzey işlemi uygulanmış deneme örneklerinde doğal ve hızlandırılmış yaşlandırma sonrası ayrı ayrı belirlenmiştir. İlk olarak, Türkiye'de doğal olarak yetişen çalışma ağaçları kavak (Populus tremula-TK), dişbudak (Fraxinus angustifolia-DYD), ladin (Picea orientalis-DL) ve göknar (Abies bornmülleriana-UG) seçilmiştir. Ardından çalışma ağaçları ThermoWood® yöntemi ile ısıl işleme tabi tutulmuşlardır. Daha sonra, DYD ve UG için tam kuru yoğunluk (TKY), hava kurusu yoğunluk (HKY) ve statik eğilme direnci (ED) ve statik eğilmede elastikiyet modülü (EM) test örnekleri, aynı zamanda tüm ağaç türlerinden yaşlandırma çalışması yapılacak deneme örnekleri hazırlanmıştır. Yaşlandırma test örneklerine tek bileşenli (STB), çift bileşenli (SÇB) ve renkli olmak (SRV) üzere üç farklı içeriğe sahip su bazlı vernik (SBV) ile yüzey işlemi uygulanmıştır. Örnekler üzerinde daha sonra 190 gün boyunca doğal yaşlandırma (DY), 336 saat hızlandırılmış yaşlandırma (QUV) işlemi gerçekleştirilmiştir. Yaşlandırma testleri sonrasında en küçük ΔE değerleri SRV elde edilmiştir. Çalışma sonuçlarına göre ısıl işlem görmüş ağaç malzemelerin dış hava koşullarına açık kullanımlarında renk değişimine karşı alınabilecek en etkili tedbirlerden birisinin SRV kullanılmasının olduğu söylenebilir. Öte yandan HT test örneklerinde kontrol örneklerine (K) göre yoğunluk değerleri ile ED’nin azaldığı, EM değerinin ise arttığı belirlenmiştir.

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Cite This Article

AYTİN, A., KORKUT, S., ÇAKICIER, N. (2021). The Effect of Different Aging Conditions on Color Change of Some Wood Species in ThermoWood® Products. Bartın Orman Fakültesi Dergisi, Cilt: 23 - Sayı: 1, 104–118. https://ajindex.com/articles/126064

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