Modification of rice biomass wastes for eco-friendly particleboard

Abstract

Rice husk and rice straw are some of abundantly available agricultural wastes that could substitute the utilization of wood as particleboard raw-materials. Nevertheless, recent studies show that rice husk and rice straw instigated low mechanical and physical properties of particleboard. Modification of rice husk and rice straw particle was investigated in order to improve particleboard properties by immersing rice husk and straw in boiling water (100°C) for 0.5, 1, 2 h and in Na2CO3 (80°C) for 1 h, and combination of rice husk as face and back layers and rice straw as core layer. The boards were manufactured under pressing conditions of 200°C for 10 min used citric acid and sucrose as adhesive. Pre-treatment of 1 h boiling water of particle resulted the highest quality of all properties and satisfy the JIS 5908 (2003) requirement in Modulus of Rupture (MOR) and Internal Bonding (IB). Combining rice husk as face and back layer and rice straw as core layer resulting in IB improvement. Compared to the other adhesives, citric acid and sucrose adhesives showed better mechanical and physical properties for rice husk and rice straw particleboard manufacturing.