Abstract
In this paper, we introduced a bamboo longitudinal flattening technology and analyzed the effects of the softening–flattening process on the physical and mechanical properties of moso bamboo. This is a newer bamboo processing technology that can enhance the utilization and reduce pollution compared with traditional bamboo-based products. Results showed that the parenchyma cells distorted and compacted due to the flattening process. The hemicellulose and cellulose content decreased, while the content of lignin presented an increasing tendency. As expected, the dimensional stability of moso bamboo enhanced due to the decrement of hemicellulose. The softening–flattening process positively contributed to the micro-mechanical properties of treated bamboo specimens. For example, the hardness and modulus of elasticity of the untreated bamboo sample increased from 0.58 and 15.7 GPa to 0.8 and 17.5 GPa, respectively. In addition, the changes in cellulose crystallinity and mechanical properties were also investigated in this paper. The cellulose crystallinity increased from 37.5% to 43.2%, significantly. However, the modulus of rupture of the flattened bamboo board decreased from 9000 to 7500 MPa due to the grooves made by the flattening roller. The MOE of flattening bamboo board showed the same decreasing tendency.
Highlights
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Bamboo Engineering and Technology Research Center, State Forestry and Grassland Administration, Abstract: In this paper, we introduced a bamboo longitudinal flattening technology and analyzed the effects of the softening–flattening process on the physical and mechanical properties of moso bamboo
The bamboo parenchyma cell walls deformed and distorted due to the external pressure and high temperature. This is because the high pressure and high-temperature condition degraded the main chemical composition in the bamboo cell walls, resulting in this deformation [27–29]
The bamboo culms exhibit rubbery behavior so that the bamboo culms can be flattened without marked damage
Summary
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Bamboo Engineering and Technology Research Center, State Forestry and Grassland Administration, Abstract: In this paper, we introduced a bamboo longitudinal flattening technology and analyzed the effects of the softening–flattening process on the physical and mechanical properties of moso bamboo. This is a newer bamboo processing technology that can enhance the utilization and reduce pollution compared with traditional bamboo-based products. The hemicellulose and cellulose content decreased, while the content of lignin presented an increasing tendency. Bamboo can be softened by heat treatment medium
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