Soda-Potasyum Borhidrür Yöntemiyle Fıstık Çamı Öz ve Diri Odunlarından Elde Edilen Kağıt Hamurlarının Özelliklerinin Karşılaştırılması

Abstract

Bu çalışmada fıstık çamı öz ve diri odunlarından elde edilen kağıt hamurlarının özelliklerinin karşılaştırılması ve pişirme işlemlerinde koruyucu ajan olarak kullanılan potasyum borhidrürün (KBH4) kağıt hamuru özellikleri üzerine etkilerinin araştırılması amaçlanmıştır. KBH4 oranı değiştirilerek öz ve diri odunlara sekiz farklı pişirme deneyi uygulanmıştır. Pişirme deneyleri sonucundan elde edilen kağıt hamurlarının bazı kimyasal, fiziksel ve optik özellikleri belirlenmiş ve KBH4’ün bu özellikler üzerine etkileri incelenmiştir. Öz odunun içerdiği yüksek ekstraktif maddelerden dolayı kağıt hamur verimi diri odundan yaklaşık %24 daha düşük çıkmıştır. Pişirme işlemlerinde KBH4 kullanımı ile diri odun hamur verimleri artarken öz odun hamur verimlerinde düşüşler meydana gelmiştir. Diri odunlardan elde edilen kağıt hamurlarının kappa numaraları ve viskozite değerlerinin öz odun hamurlarından daha iyi olduğu tespit edilmiştir. Pişirme çözeltisine ilave edilen KBH4 diri odunu hamurlarının kappa numaralarını yükseltirken öz odunu hamurlarınkini düşürmüştür. Diri odun ve öz odun hamurlarının optik özellikleri arasında belirgin bir fark bulunmazken diri odun hamurlarının fiziksel özellikleri öz oduna nazaran daha yüksek çıkmıştır. Ayrıca, KBH4 kullanımı her iki kağıt hamuru türünün de optik özelliklerini iyileştirmiştir.

Keywords

• Diri odun
• Fıstık çamı
• Kağıt hamuru
• Öz odun
• Potasyum borhidrür

Comparison of Pinus Pinea Heartwood and Sapwood Pulps Obtained by Soda-Potassium Borohydride Method

Abstract

This study was aimed to compare pulp properties of Pinus pinea heartwood and sapwood pulp obtained from modified soda method and to investigate effects of potassium borohydride (KBH4) used as a protective agent in cooking processes. Eight different cooking experiments were applied to the heartwood and sapwood samples by changing KBH4 ratio. The effects of KBH4 on some chemical, physical and optical properties of pulps obtained from cooking processes were determined. Due to high content of soluble extraction of heartwood, yield of heartwood pulp was approximately 24% lower than that of sapwood pulp. Using KBH4 in pulping processes increased sapwood pulp yield, while it has a decreasing impact on heartwood pulp yield. Kappa number and viscosity values of sapwood pulps were better than those of heartwood pulps. With addition of KBH4 to liquor there was increased kappa numbers of sapwood pulp in contrast to heartwood. In generally, physical properties of sapwood pulp are better than that of heartwood pulp. But, there are no significant difference in optical properties between heartwood and sapwood pulp. With no regard to the type of pulps used, the pulp optical properties were improved by using KBH4 in pulping processes.

Keywords

• Heartwood
• Pinus pinea
• Potassium borohydride
• Pulp
• Sapwood

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