A new approach for fabricating crack-free, flattened bamboo board and the study of its macro-/micro-properties

Yuan, Tiancheng; Han, Xin; Wu, Yifei; Hu, Shouheng; Wang, Xinzhou; Li, Yanjun

doi:10.1007/s00107-021-01734-x

Cited by 28 publications

(17 citation statements)

References 34 publications

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“…Due to global climate change, there is an urgent need to find a woody material that can replace wood and thus reduce the deforestation of native trees and the loss of forest resources [ 1 , 2 ]. It is necessary to find alternative woody materials which are low cost, have excellent mechanical properties, and are easy to harvest, versatile, and renewable, to solve the above problem [ 3 , 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Change in Micro-Morphology and Micro-Mechanical Properties of Thermally Modified Moso Bamboo

et al. 2022

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In recent years, saturated steam heat treatment has been considered as an environmentally friendly and cost-effective modification method compared with traditional heat treatment media. In this study, bamboo was treated by saturated steam, and the change in chemical composition, cellulose crystallinity index, micro-morphology, and micromechanical properties were analyzed by a wet chemistry method, Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), nanoindentation, and so on. Results illustrated that the parenchyma cell walls were distorted due to the decomposition of hemicellulose and cellulose in bamboo samples. As expected, the hemicellulose and cellulose content decreased, whereas the lignin content increased significantly. In addition, the cellulose crystallinity index and thus the micromechanical properties of bamboo cell walls increased. For example, the hardness increased from 0.69 GPa to 0.84 GPa owing to the enhanced crystallinity index and lignin content.

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Section: Introductionmentioning

confidence: 99%

Change in Micro-Morphology and Micro-Mechanical Properties of Thermally Modified Moso Bamboo

et al. 2022

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“…As is visible in Figure 4, the cellulose crystallinity index can be calculated by Equation (2). The mean crystallinity index values of the control was 39.9%.…”

Section: Crystallinity Index Of Bamboo Fibermentioning

confidence: 96%

“…Due to high yield, sustainability, rapid growth, adaptability, and great mechanical properties, Moso bamboo has been considered as an important economic in China [1,2]. However, multiple products such as bamboo plywood, bamboo scriber, bamboo plastic composites, and wood-bamboo composite lose their natural appearance [3,4].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Effects of Superheated Steam on Microstructure and Micromechanical Properties of Bamboo Cell Walls Using Quasi-Static Nanoindentation

Yuan

Liu

Dong

et al. 2021

Forests

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In this paper, quasi-static nanoindentation was applied for investigating the influence of superheated steam on microstructure and micromechanical properties of Moso bamboo cell walls. The changes of mico-morphology, chemical composition, cellulose crystallinity index, micro-mechanical properties of bamboo were analyzed via scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and nanoindentation. As expected, the content of hemicellulose and cellulose showed a downward trend, whereas the relative lignin content increased. Elastic modulus and hardness of the cell wall increased compared with that of the untreated sample. The elastic modulus and hardness of bamboo increased from 11.5 GPa to 19.5 GPa and from 0.35 GPa to 0.59 GPa. Furthermore, results showed that the creep resistance positively correlated to treatment severity.

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“…However, treatment with chemical agents is not environmentally friendly and affects the natural and sustainable character of bamboo. Through reviewing some reported studies and patent [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ] and after visiting some industries in China, bamboo softened by saturated steam in a sealed equipment is shown to be most the eco-friendly and cost-efficient method now. Compared with traditional softening treatment mediua (oil, hot water, hot air, etc.…”

Section: Introductionmentioning

confidence: 99%

“…However, the process is controlled manually with very low efficiency, and the width of the flattened bamboo board is limited. In recent years, some scholars reported “notched flattening technology” [ 17 ]. “Notched flattening technology” can flatten bamboo culms through making non-penetrating indentations in order to increase the circumference of the inner layer so that the softened bamboo culms can be flattened without cracks.…”

Section: Introductionmentioning

confidence: 99%

Study on Bamboo Longitudinal Flattening Technology

et al. 2022

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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.

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A new approach for fabricating crack-free, flattened bamboo board and the study of its macro-/micro-properties

Cited by 28 publications

References 34 publications

Change in Micro-Morphology and Micro-Mechanical Properties of Thermally Modified Moso Bamboo

Change in Micro-Morphology and Micro-Mechanical Properties of Thermally Modified Moso Bamboo

Determination of the Effects of Superheated Steam on Microstructure and Micromechanical Properties of Bamboo Cell Walls Using Quasi-Static Nanoindentation

Study on Bamboo Longitudinal Flattening Technology

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