Evaluation of the mechanical and physical properties of particleboards manufactured from rice husk

Öz

The effect of rice husk ratios on some physical and mechanical properties of particleboard was investigated. To meet this objective, particleboards with different proportions of wood, rice husk, urea-formaldehyde glue, and other chemicals were produced. The density, moisture content, water absorption, thickness swelling, modulus of rupture (MOR), modulus of elasticity (MOE), internal bond strength, and screw withdrawal resistance of the particleboards were determined. Experimental results indicated that using rice husk in particleboard production improved the dimensional properties of the particleboards. Also, it was found that mechanical properties decreased as the amount of rice husk increased in particleboard production. This is thought to be due to the fact that silica, which is one of the main components of rice husk, weakens the bonding between lignocellulosic raw materials and glue used in particleboard production.

Anahtar Kelimeler

• Particleboard
• Rice husk
• Physical and mechanical properties

Pirinç kabuğundan üretilen yongalevhaların bazı fiziksel ve mekanik özelliklerinin değerlendirilmesi

Öz

Bu çalışmada pirinç kabuğu oranlarının yonga levhanın bazı fiziksel ve mekanik özellikleri üzerindeki etkisi araştırılmıştır. Bu amaçla, farklı oranlarda odun karışımı, pirinç kavuzu, üre-formaldehit tutkalı ve diğer kimyasallar içeren yonga levhalar üretilmiştir. Yonga levhaların yoğunluğu, nem içeriği, su emme, kalınlık şişmesi, eğilme direnç (MOR), eğilmede elastikiyet modülü (MOE), yüzeye dik çekme direnci ve vida çekme direnci belirlenmiştir. Deneysel sonuçlar, yongalevha üretiminde pirinç kabuğu kullanımının yongalevhaların boyutsal stabilitesini iyileştirdiğini göstermiştir. Ayrıca, yongalevha üretiminde pirinç kavuzu miktarı arttıkça mekanik özelliklerin azaldığı tespit edilmiştir. Bu durumun, pirinç kavuzunun ana bileşenlerinden biri olan silikanın, lignoselülozik hammaddeler ile yongalevha üretiminde kullanılan tutkal arasındaki bağı zayıflatmasından kaynaklandığı düşünülmektedir.

Anahtar Kelimeler

• yongalevha
• Pirinç kavuzu
• Fiziksel ve mekanik özellikler

Kaynakça

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