Manufacture and Properties of Non-Wood Binderlessboard: Effect of Storage Method and Manufacturing Process on Chemical Composition of Bagasse Binderlessboard

Ragil Widyorini (Forest Product Technology Department, Faculty of Forestry, Gadjah Mada University Jl. Agro no. 1, Bulaksumur Yogyakarta 55281)
Shuichi Kawai (Research Institute for Sustainable Humanosphere, Kyoto University Kyoto)

Wood Research Journal : Journal of Indonesian Wood Research Society
Vol 1, No 1 (2010): Wood Research Journal

Effects of storage and pressing methods on the chemical composition of Sugarcane (Saccharum officinarum L.) bagasse binderlessboards were investigated by chemical and spectroscopic analyses. The inner layer (core/pith) and the outer hard fibrous layer (face/rind) of bagasse were used as raw materials. The result showed that effect of steam-injection pressing was higher than hot pressing treatment on the chemical composition of bagasse binderlessboards. Under steam-pressure of 1.0 MPa for 10 min, hemicelluloses of bagasse were more significantly degraded than α-cellulose and lignin. Decreasing of Syringyl/Guaiacyl (S/G) and Cinnamic acids/Guaiacyl (C/G) ratios indicated that modification of lignin had occurred during steam and heat treatments. Considering that the residual sugar in bagasse was still high, the storage method of Sugarcane bagasse was an important key for producing bagasse binderlessboards.