THE EFFECT OF BORIC ACID MODIFICATION ON THE COMBUSTION PROPERTIES OF WATER-BASED VARNISH

Abstract

In this research, the effects of boric acid (H₃BO₃) solution on the combustion properties of water based varnish was investigated. For this purpose, water-based varnish which was modified with 5% boric acid at varied amount (10%, 20%, and 30%) was applied on the experiment samples made from scots pine (Pinus sylvestris L.) and beech (Fagus orientalis L.). Afterwards, the combustion properties of the water based varnish was determined according to ASTM-E 69 standard principles.  During combustion tests, released amount of oxygen (%), carbon monoxide (ppm), nitrogen oxide (ppm) gases, mass loss of the samples (%) and combustion temperature values are determinate. According to the research outcome, when increase the boric acid value in the water based varnish the resistance properties against to fire increases. In addition it may also be suggested that, in the selection of the furniture and decoration parts likely to be exposed to higher temperatures, beech wood is better than pine wood.

Keywords

• Boric Acid,Modification,Wooden Material,Water Based Varnish,Combustion Test

BORİK ASİT MODİFİKASYONUNUN SU BAZLI VERNİĞİN YANMA DİRENCİNE ETKİSİ

Abstract

Bu araştırmada, borik asit (H₃BO₃) çözeltisinin su bazlı verniğin yanma direnci üzerindeki etkisi araştırılmıştır. Bu maksatla, sarıçam (Pinus sylvestris L.) ve kayın (Fagus orientalis L.)’dan hazırlanan örneklere, farklı oranlarda (%10, %20, %30) %5’lik borik asitle modifiye edilmiş su bazlı vernik uygulanmıştır. Daha sonra örnekler, ASTM-E 69-15 esaslarına göre yanma deneyine maruz bırakılmıştır. Yanma deneyi sonrasında, ağırlık kaybı (%), açığa çıkan oksijen (%), karbon monoksit (ppm) ve azot oksit (ppm) gazları ile sıcaklık değerleri (ºC) tespit edilmiştir. Araştırma sonucuna göre, su bazlı vernik içindeki borik asit karışım oranının artışı, yanmaya karşı olan direnci artırmıştır. Ayrıca, yüksek ısıya maruz kalması muhtemel mobilya dekorasyon elemanlarında kullanılacak ağaç malzeme seçiminde, sarıçama kıyasla kayının tercih edilmesi önerilebilir.

Keywords

• Borik Asit,Modifikasyon,Ağaç Malzeme,Su Bazlı Vernik,Yanma Deneyi

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