Mehmet AKGÜL, İlhan ERDÖNMEZ, Mustafa ÇİÇEKLER, Ahmet TUTUŞ

Kanola Saplarından (Brassica napus L.) Modifiye Kraft Yöntemi ile Kağıt Hamuru ve Kağıt Üretimi Üzerine Araştırmalar

Çalışmanın amacı: Bu çalışma, kanola (Brassica napus L.) saplarının kağıt hamuru ve kağıt üretiminde alternatif bir hammadde olarak değerlendirilmesini amaçlamıştır. Çalışmanın alanı: Bu çalışma Kahramanmaraş Sütçü İmam Üniversitesi, Orman Fakültesi, Kağıt Hamuru ve Kağıt Üretim Laboratuvarı'nda yürütülmüştür. Materyal ve Yöntem: Kağıt hamuru üretimine geçilmeden önce kanola saplarının kimyasal içeriği araştırılmıştır. Holoselüloz, alfa selüloz, lignin ve kül içerikleri ile NaOH (%1), soğuk ve sıcak su çözünürlükleri belirlenmiştir. Kanola saplarından kağıt hamuru üretimi için NaBH4 ilaveli modifiye kraft yöntemi kullanılmıştır. Sülfidite %26, 28 ve 30, NaBH4; %0, 0.1, 0.3, ve 0.5 oranlarında değiştirilirken aktif alkali oranı %20 olarak sabit tutulmuştur. Optimum koşulu belirlemek için 12 farklı koşulda pişirme işlemi yapılmıştır. Ayrıca elde edilen kağıt hamurlarından üretilen kağıtların fiziksel ve optik özellikleri de belirlenmiştir. Sonuçlar: Kanola saplarının holoselüloz (%72.10) ve lignin (%13.15) içeriği yapraklı ağaç odunları ile benzer oranlarda bulunmuştur. Optimum pişirme, %20 aktif alkali, %28 sülfidite ve %0.5 NaBH4 oranlarının kullanıldığı koşulda elde edilmiş ve bu koşulda kağıt hamuru toplam verimi %44.7 olarak bulunmuştur. Aynı zamanda NaBH4 ilavesi ile toplam verim %24.1 oranında artarken kappa numarası %9.7 oranında azalmıştır. Araştırma Vurguları: Elde edilen sonuçlar, kanola saplarının kağıt hamuru ve kağıt üretimi için uygunluğunu ve NaBH4'ün hamur verimliliği için etkili bir pişirme katkı maddesi olduğunu ortaya koymuştur.

Anahtar Kelimeler:

Brassica napus L., kanola sapları, NaBH4, Kraft pişirmesi

The Investigations on Pulp and Paper Production with Modified Kraft Pulping Method from Canola (Brassica napus L.) Stalks

Aim of study: This study was carried out to evaluate canola (Brassica napus L.) stalks as an alternative raw material for pulp and paper production. Area of study: This work was carried out in Kahramanmaraş Sütçü Imam University, Faculty of Forestry, Pulp and Paper Production Laboratory. Material and Methods: Before pulping procedure, the chemical components of the canola stalks were investigated. The holocellulose, alpha cellulose, lignin, and ash contents and NaOH (1%) and cold-hot water solubilities were determined. Modified kraft cooking method was used for pulping from canola stalk by using sodium borohydride (NaBH4). Sulfidity charge; 26, 28, 30%, and NaBH4 charge; 0, 0.1, 0.3, 0.5% were changed while keeping constant temperature (150 oC), time (120 min) and alkali charge (20%). For determination of the optimum pulping condition, 12 cooking experiments were performed to canola stalks. In addition, the physical and optical properties of the papers produced from the obtained pulps were also determined. Main results: The holocellulose (72.10%) and lignin (13.15%) contents of the canola stalks were found to be similar with hardwoods. The optimum cooking condition was determined as 20% active alkali, 28% sulfidity and 0.5% NaBH4 charges (as NaOH) and the total pulp yield were obtained about 44.7% in this condition. Besides, the addition of NaBH4 increased pulp yield by 24.1% and decreased kappa number by 9.7%. Research highlights: It was concluded that obtained results demonstrate the suitability of canola stalk for pulp and paper production and NaBH4 is an effective cooking additive for the pulp yield.

Keywords:

Brassica napus L., canola stalk, NaBH4, Kraft pulping,

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