Coupling Preparation of Reconstituted-Bamboo-Board and Xylooligosaccharide via Hydrothermal Desaccharification Catalyzed by Slight Solid Alkali

Abstract

Low-temperature carbonization is usually used to decompose bamboo hemicellulose to improve anti-decay and anti-mildew properties of bamboo board. Since xylan extraction from bamboo can produce xylo-oligosaccharides, there is a good coupling point between bamboo desaccharification and xylo-oligosaccharide production. In this study, the solution of xylan in bamboo and the controllable degree of polymerization hydrolysis could be achieved by solid base catalytic hydrothermal desugar treatment as well as the mechanical properties of bamboo could be maintained. The yield of xylan was up to 16.8% by appropriate alkali-suppressed method. In addition, the color of the desugared bamboo board was lighter, which was applicable to a wide range. Compared with carbonized bamboo board, the key mechanical properties of desugared bamboo board were significantly improved by 2 to 4 times. Under the same conditions, the anti-decay and anti-mildew properties of d desugared bamboo board were better than those of carbonized bamboo board as well. In conclusion, this study demonstrated the feasibility of hydrothermal desaccharification coupling for the preparation of outdoor reconstituted-bamboo-board.