Investigation Of The Color Changing Properties Of Wood Stain Derived From Pinar Leaves

Öz

This study was designed to develop an environmentally friendly wood stain derived pinar (Quercus aucheri) leaves and determine the color stability of this stain when exposed to UV light irradiation. Wood stains derived from pinar leaves were prepared from aqueous solution with %3 iron (FeSO4.7H2O ), % 5 alum ((KAl(SO4)2.12H2O)), and % 10 vinegar mordant mixtures. Scots pine (Pinus sylvestris L.), Turkish oriental beech (Fagus orientalis Lipsky) and oak (Quercus petraea L.) wood specimens were used as staining substrates. After treatment with the stain, the wood panels were exposed to UV light irradiation for periods of 100, 200, and 300 hours and determinated the total color changes was according to ISO 2470 standards. Results showed that wood stain derived from pinar extract provided some color stability after UV irradiation. According to results, Scots pine specimens treated with the pinar extract + iron mixture provided the smallest total color changes. Meanwhile the highest total color change provided on the Scots pine treated with pinar extract+alum mixture.

Anahtar Kelimeler

• Accelerated Weathering
• mordant
• natural dyes and pinar leaves.

Pinar Bitki Ekstraktından Elde Edilen Doğal Boyanın Ahşap Malzemeye Üstyüzey Olarak Uygulanması

Öz

Bu çalışma, ahşap ürünlerin boyanmasında kullanılabilecek, çevre ve insan sağlığına zararsız doğal boyaların geliştirilmesi ve hızlı yaşlandırma şartları altındaki renk değişim özelliklerinin belirlenmesi amacıyla yapılmıştır. Doğal boyar madde pinar bitkisinden (Quercus aucheri) ekstrakte edilmiş, %3 demir sülfat (FeSO4.7H2O ), %5 alüminyum şapı ((KAl(SO4)2.12H2O)) ve % 10 üzüm sirkesi ile mordanlanmıştır. Ahşap test malzemesi olarak seçilen sarıçam (Pinus sylvestris Lipsky), doğu kayını (Fagus orientalis Lipsky) ve meşe (Quercus petraea Lipsky) örnekler üzerine uygulanan doğal boyalar, 100, 200 ve 300 saatlik “Hızlandırılmış yaşlandırma (Accelerated weathering)” periyotlarından sonra toplam renk değişim değerleri ( ΔE ), ISO 2470 standartlarında belirlenmiştir. Deney sonuçlarına göre; en az toplam renk değişim değeri ( ΔE ), pinar boyasının sarıçam odununda ve demir sülfat mordanlı uygulamasında elde edilirken, en fazla renk değişimi ise yine sarıçam odunundaki alüminyum sülfat mordanlı uygulamasında elde edilmiştir.

Anahtar Kelimeler

• Doğal boyalar
• hızlandırılmış yaşlandırma
• mordan
• pinar yaprağı

Kaynakça

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