Effects of Impregnation and Heat Treatment on Some Physical and Mechanical Properties of Wood Material

Year 2023, , 1421 - 1429, 01.12.2023

Osman Perçin , Şemsettin Doruk , Mustafa Altunok

https://doi.org/10.2339/politeknik.1120778

Abstract

The aim of this study was to determine some physical and mechanical properties of spruce (Picea orientalis) wood, which was impregnated with aqueous solutions of valonia (valex) (the extract of Quercus ithaburensis), pine bark powder (pinex) (Pinus brutia Ten.) and gallnut powder (galex) (Quercus infectoria Oliver) as a pre-treatment and then heat treated. Test specimens were prepared from sapwood of spruce wood and impregnated with 10% tannin solutions before heat treatment base on ASTM D 1413-76. After pre-impregnation processs, specimens subjected to heat treatment at 150 °C, 175 °C and 200 °C for 2 h. The effect of impregnation process and heat treatment temperature on the air-dried density, compressive strength paralell to the grain (CS), bending strength (MOR) and modulus of elasticity in bending (MOE) were analyzed. As results, impregnation solutions showed positive effects on mechanical strength in unheat-treated samples and determined that mecnaical strength loses due to heat treatment slightly limited at low temperatures. However, strength loses increased with increasing temperature. The highest strength loses were also determined in impregnated samples with galex extract and heat-treated samples at 200 °C.  

Keywords

Heat treatment, plant extracts, wood material, impregnation

Emprenye ve Isıl İşlemin Ahşap Malzemenin Bazı Fiziksel ve Mekanik Özelliklerine Etkileri

Abstract

Bu çalışmanın amacı, ön işlem olarak meşe palamudu (valex) (Quercus ithaburensis), kızılçam kabuğu (pinex) (Pinus brutia Ten.) ve meşe mazısı (galex) (Quercus infectoria Oliver) ekstraktlarının sulu çözeltileri ile emprenye edildikten sonra ısıl işleme tabi tutulan ladin (Picea orientalis) odunun bazı fiziksel ve mekanik özelliklerinin belirlenmesidir. Test örnekleri, ladin ağacının diri odun kısmından hazırlanmış ve ısıl işlemden önce ASTM D 1413-76'ya göre %10 tanen çözeltileri ile emprenye edilmiştir. Ön emprenye işlemlerinden sonra, test örnekleri 150 °C, 175 °C ve 200 °C'de 2 saat süreyle ısıl işleme tabi tutulmuştur. Emprenye ve ısıl işlemin hava kurusu yoğunluk, liflere paralel basınç direnci (CS), eğilme direnci (MOR) ve eğilmede elastikiyet modülüne (MOE) etkileri analiz edilmiştir. Sonuç olarak, emprenye çözeltilerinin ısıl işlem uygulanmamış örneklerinde mekanik özellikleri olumlu etkilediği ve düşük sıcaklıklarda ısıl işlemden kaynaklanan direnç kayıplarını bir miktar sınırladığı tespit edilmiştir. Ancak artan sıcaklıkla beraber direnç kayıpları da artmıştır. En yüksek direnç kayıpları, galex ile emprenye edilmiş ve 200 °C'de ısıl işlem uygulanmış örneklerde tespit edilmiştir.

Keywords

Isıl işlem, bitki ekstraktları, ahşap malzeme, emprenye

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