Mehmet Budakçı, Raşit Esen, Cemal Özcan, Mustafa Korkmaz, Hüseyin Pelit

BORİK ASİT MODİFİKASYONUNUN SU BAZLI VERNİĞİN YANMA DİRENCİNE ETKİSİ

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.

Anahtar Kelimeler:

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

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

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,

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ASTM-E-69, Standart Test Method for Combustible Properties of Treated Wood by the Fire-Tube Apparatus, American Society for Testing and Materials, 1975.
ASTM D3023-98, Standard Practice for Determination of Resistance of Factory-Applied Coatings on Wood Products to Stains and Reagents, American Society for Testing and Materials, 2003.
Baysal, E., Peker, H., Çolak, M., Tarımer, İ., “Fire Properties of Varnish Coated Wood and Fire Retardant Effect of Pretreatment with borates”, Science and Engineering Journal of Fırat University, 15(4), 645-653, 2003.
Baysal, E., Simsek, H., Toker, H., Çolak, M., Yiğitbaşı, O.N., “Hygroscopicty Levels of Wood Treated with Boron Compounds”, III. International Boron Symposium, Ankara, Turkey, 2006, 45-51.
Budakçı M., Uysal B., Esen R., “The Effect of Boric Acid Modification on the Hardness Value of Water Based Varnish” 5th International Advanced Technologies Symposium, Karabuk, Turkey, 2009.
Budakçı M., Akkuş M., Budakçı A.A., “Production and Use of Water Borne Varnishes and Paints in Turkey”, 6th International Advanced Technologies Symposium, Elazığ, Turkey, 2011.
Hill, C., Wood Modification-Chemical, Thermal and Other Processes, Wiley, Chichester, England, 2006.
H. Hafızoğlu, M.K. Yalınkılıç, Ü.C. Yıldız, E. Baysal, H. Peker, Z. Demirci, Türkiye Bor Kaynaklarının Odun Koruma (Emprenye) Endüstrisinde Değerlendirilmesi. TUBITAK Project No TOAG-875, Ankara, 1994.
Levan, S. L., Winandy, J. E., “Effects of Fire Retardant Treatments on wood strength”, Wood and Fire Science, 22, 113-131, 1990.
Özçifçi, A., Okçu O., “The influence of the impregnating chemicals on the bonding strength of impregnated wood materials”, Journal of Applied Polymer Science, 107(5), 2871-2876, 2008.
Richardson, B. A., Wood Preservation, The Construction Press Ltd., Lancaster, 1978.
Terzi E., Fire properties of wood materials treated with amonia compounds, Unpublished master's thesis, Istanbul University Institute of Graduate Studies In Science and Engineering, İstanbul, 2008.
TS 2470 “Sampling Methods and General Requirements For Physical And Mechanical Tests”, TSE., Ankara, 1976.
TS 2471, “Determination Of Moisture Content For Physical And Mechanical Tests”, TSE., Ankara, 1976.
TS 2472, “Determination of Density for Physical And Mechanical Tests” Ankara, 1976.
TS 6035 EN ISO 3251, “Paints and Varnishes-Determination of Non-Volatile Matter Of Paints, Varnishes And Binders For Paints And Varnishes” Ankara, (2009)
Uysal, B., Özçifçi, A. ve Yılmaz S., “The Combustion Properties of Different Wood Materials”, Science and Engineering Journal of Fırat University, 14 (1), 79-87 2002.
Uysal, B., Kurt, Ş., “Combustion Properties of Beech and Pine Samples Impregnated with Boron Compounds”, I. National Boron Workshop Proceeding, 33-41, 2005.
Yalınkılıç, M.K., Örs, Y., “Duglas Göknarı {Pseudotsuga menziesii (Mirb.) Francol Odunun Anatomik ve Çeşitli Kimyasal Maddelerle Emprenye Edilme Özellikleri”, Journal of Turkish Agriculture and Forestry, 21, 433–444, Ankara, 1996.
Yapıcı F., Uysal B., Kurt Ş., Esen R., and Özcan C., “Impacts of Impregnation Chemicals On Finishing Process and Combustion Properties of Oriental Beech (Fagus Orientalis L.)” Wood Bioresources, 6(4), 3933-3943, 2011