HIZLI YAŞLANDIRILMIŞ ISIL İŞLEM GÖRMÜŞ ODUNUN BAZI YÜZEY KARAKTERİSTİKLERİ

Öz

Isıl işlem görmüş odun dış mekân uygulamalarında geniş bir kullanıma sahiptir. Bu çalışmanın amacı 190 ve 212 °C sıcaklıkta ısıl işlem görmüş ve hızlı yaşlandırmaya maruz bırakılmış Sarıçam (Pinus sylvestris L.), Uludağ göknarı (Abies bornmülleriana mattf.), Kızılağaç (Alnus glutinosa subsp. Barbata (C. A. Mey.)), ve Kayın (Fagus orientalis Lipsky) odunun renklerindeki değişimlerin belirlemektir. Bu çalışmada hızlı yaşlandırma testleri 288 saat süre ile ASTM G154 standart metoduna uygun olarak gerçekleştirilmiştir. Isıl işlem görmüş ve görmemiş odunların ultraviyole ışınlarıyla fotodedgradasyonu renk açısından değerlendirilmiştir. Isıl işlem görmüş odunun hızlı yaşlandırma sonrası renginin işlem görmemiş odundan daha stabil olduğu sonucuna ulaşılmıştır. Isıl işlem renk stabilizasyonunu geliştirmede etkili bir metottur. 

Anahtar Kelimeler

• ısıl işlem,hızlı yaşlandırma,renk,odun

SOME SURFACE CHARACTERISTIC OF ARTIFICIALLY WEATHERED HEAT-TREATED WOOD

Abstract

- Heat-treated wood has a wide usage in outdoor applications. The objective of this research was to determine changes in the color of heat-treated Scots pine (Pinus sylvestris L.), Turkish fir (Abies bornmülleriana mattf.), Black alder (Alnus glutinosa subsp. Barbata (C. A. Mey.)), Oriental beech (Fagus orientalis Lipsky) wood at temperature 190 °C and 212 °C that was exposed to artificial weathering. In this study, accelerated weathering tests (UV and moisture) were executed according to the standard method of ASTM G154 for a period of 288 h. Photodegradation by ultra-violet radiation of both heat-treated and untreated wood was evaluated in terms of color. The degradation of lignin and extractives of wood is resulted in an immediate color change of the wood. It was obvious that the heat-treated wood resulted in more color stability than untreated wood during weathering. Heat-treatment is an effective method to improve color stability. 

Keywords

• Heat-treatment,weathering,color,wood

Kaynakça

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