Characteristics of Sago residue as a lignocellulosic resource I Anatomical and physicochemical properties

Abstract

 In this study on the effective utilization of sago residue, analysis of sago residue as a lignocellulosic resource was undertaken. The cellular components and the cell sizes in deconstructed sago residue were examined. These results showed that sago residue is predominantly composed of parenchyma cells (The occupation area ratio was approximately 85%). In addition, the fiber and vessel contents were low, and these elements were remarkably damaged. These findings indicate that the sago residue is not suitable as a source of raw fiber material. The various properties of sago residue as a powder sample, which include grindability, internal surface area, and crystallinity of cellulose and starch, were then evaluated. From these analyses, it was clear that sago residue is more easily ground than Sugi (Cryptomeria japonica), and the crystallinity index for cellulose was reduced after simple processing. In the sago residue, the value of the internal surface area is higher than that of regenerated cellulose. Because sago residue possesses these properties, sago residue is suitable for use as a powder raw material in chemical modifications.