Multi-scale evaluation of the effect of saturated steam on the micromechanical properties of Moso bamboo

Yuan, Tiancheng; Wang, Zhaoshun; Han, Xin; Yuan, Zhurun; Wang, Xinzhou; Li, Yanjun

doi:10.1515/hf-2020-0266

Cited by 26 publications

(11 citation statements)

References 24 publications

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“…Unfortunately, some physical properties of bamboo are decreased due to the disruption of hydrogen bonds when the treatment temperature is above 180 °C. Changes in chemical composition, density, EMC, and mechanical properties of thermally modified wood have been intensely investigated at the macro scale [ 14 , 15 , 16 ]. In addition, micro-morphology and nanomechanical properties of thermally modified bamboo have been less intensely analyzed at the nano-scale.…”

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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“…However, the hydroxyl groups decrease with the degradation of hemicellulose [ 25 ]. Thus, the equilibrium moisture content of the treated bamboo samples tends to decrease, which indicates the improvement in the dimensional stability of the specimens [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Research on the Change in Chemical Composition and Fungal Resistance of Moso Bamboo with Heat Treatment

Yu¹,

Wang²

2023

Polymers

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Bamboo, as a potential alternative to biomass materials, has gained more attention from the bamboo manufacturing industry in China. However, the drawbacks, such as the dimensional instability, and low antifungal and hydrophilic properties of bamboo, inhibit its application and shorten its service life. The objective of this work was to analyze the change in chemical components and fungal resistance of moso bamboo with heat treatment. For this objective, moso bamboo specimens were thermally modified in an oven at different temperatures for a fixed duration. The results showed that the parenchymal cells distorted and deformed in comparison to the control after thermal modification. After thermal modification in an oven, the crystallinity index increased from 39% to 53%. Owing to the thermal modification, the hemicellulose and cellulose relative content decreased, as confirmed by FTIR and XPS analysis. Thus, the dimensional stability and antifungal properties of the thermally modified bamboo specimens improved.

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“…The lignin condensation can endow the increment of bamboo cell wall mechanics. Additionally, the condensation polymerization and decreased EMC can also positively affect the bamboo cell wall mechanics [ 2 , 28 , 29 , 30 , 31 , 32 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

Multi-Scale Evaluation of the Effect of Thermal Modification on Chemical Components, Dimensional Stability, and Anti-Mildew Properties of Moso Bamboo

et al. 2022

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By promoting greenhouse gas sequestration, bamboo and bamboo-based products can improve carbon storage, and thus help decrease greenhouses gas emission through replacing traditional products like concrete, steel, and alloy. Thermal modification is a useful way to effectively enhance the dimensional stability and mold-resistance property of bamboo and bamboo-based products compared with chemical treatment. This work investigates the change in anti-mildew properties, micro-structure, and chemical composition of bamboo after heat treatment. Saturated steam heat treatment was applied for this project. SEM results showed that the structural damage of parenchyma cells resulted in the separation of thin-walled cells and vascular bundles. Thus, the original regular structure of bamboo, characterized by plump and intact cells, changed markedly. After thermal modification, bamboo samples exhibited improved dimensional stability and anti-fungal properties due to the decrement of hemicellulose and cellulose. The hardness and MOE of the modified bamboo were 0.75 and 20.6 GPa, respectively.

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Multi-scale evaluation of the effect of saturated steam on the micromechanical properties of Moso bamboo

Cited by 26 publications

References 24 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

Research on the Change in Chemical Composition and Fungal Resistance of Moso Bamboo with Heat Treatment

Multi-Scale Evaluation of the Effect of Thermal Modification on Chemical Components, Dimensional Stability, and Anti-Mildew Properties of Moso Bamboo

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