Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo
Although bamboo has broad application prospects in the transportation industry, its insufficient flexibility remains a challenge when designing components with large curvature and complex shapes. In this study, SEM, XRD, FTIR, and micron-level computed tomography (Micro-CT) were used to investigate...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Polymer Testing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941825000297 |
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| author | Xiaohan Chen Xianke Wang Shaohua Gu Aiyue Huang Haitao Cheng |
| author_facet | Xiaohan Chen Xianke Wang Shaohua Gu Aiyue Huang Haitao Cheng |
| author_sort | Xiaohan Chen |
| collection | DOAJ |
| description | Although bamboo has broad application prospects in the transportation industry, its insufficient flexibility remains a challenge when designing components with large curvature and complex shapes. In this study, SEM, XRD, FTIR, and micron-level computed tomography (Micro-CT) were used to investigate the effects of alkali treatment with different mass concentrations and different loading directions on the flexibility expression of bamboo, and to evaluate the potential relationship between the structure and flexibility of bamboo. The results showed that in the bamboo samples treated with 15 wt% NaOH, fiber fibrillation and surface thin layer peeling during the fracture process increased the consumption of fracture energy, thereby improving the theoretical tensile strength and bending fracture toughness. Microstructurally, after alkali treatment, the loosening between cells increases the compressible space, leading to a significant prolongation of the plastic stage, especially when loaded from the radial bamboo yellow side (Mode II). When the NaOH concentration reached 25 wt%, the excessive removal of hemicellulose and lignin led to the destruction of the cell wall structure and a decrease in the fiber crystallinity, and the mechanical properties of bamboo were reduced. Therefore, appropriate alkali treatment can maintain the strength of bamboo and improve its flexibility, which is similar to the principle of mercerized cotton. The modified bamboo has application potential in curved components in the transportation field and can meet the requirements of lightweight, flexibility, and environmental protection. |
| format | Article |
| id | doaj-art-b7545ee164c34a33b9e5b6f91e553f45 |
| institution | Kabale University |
| issn | 1873-2348 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj-art-b7545ee164c34a33b9e5b6f91e553f452025-01-27T04:21:40ZengElsevierPolymer Testing1873-23482025-02-01143108715Effects of alkali treatment on the bending and fracture behavior of biomaterial bambooXiaohan Chen0Xianke Wang1Shaohua Gu2Aiyue Huang3Haitao Cheng4Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of National Forestry and Grassland Administration/ Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, ChinaDepartment of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of National Forestry and Grassland Administration/ Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, ChinaDepartment of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of National Forestry and Grassland Administration/ Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, ChinaDepartment of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of National Forestry and Grassland Administration/ Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, ChinaDepartment of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of National Forestry and Grassland Administration/ Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China; Corresponding author. Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing, 100102, ChinaAlthough bamboo has broad application prospects in the transportation industry, its insufficient flexibility remains a challenge when designing components with large curvature and complex shapes. In this study, SEM, XRD, FTIR, and micron-level computed tomography (Micro-CT) were used to investigate the effects of alkali treatment with different mass concentrations and different loading directions on the flexibility expression of bamboo, and to evaluate the potential relationship between the structure and flexibility of bamboo. The results showed that in the bamboo samples treated with 15 wt% NaOH, fiber fibrillation and surface thin layer peeling during the fracture process increased the consumption of fracture energy, thereby improving the theoretical tensile strength and bending fracture toughness. Microstructurally, after alkali treatment, the loosening between cells increases the compressible space, leading to a significant prolongation of the plastic stage, especially when loaded from the radial bamboo yellow side (Mode II). When the NaOH concentration reached 25 wt%, the excessive removal of hemicellulose and lignin led to the destruction of the cell wall structure and a decrease in the fiber crystallinity, and the mechanical properties of bamboo were reduced. Therefore, appropriate alkali treatment can maintain the strength of bamboo and improve its flexibility, which is similar to the principle of mercerized cotton. The modified bamboo has application potential in curved components in the transportation field and can meet the requirements of lightweight, flexibility, and environmental protection.http://www.sciencedirect.com/science/article/pii/S0142941825000297Biological materialBambooAlkali treatmentFracture |
| spellingShingle | Xiaohan Chen Xianke Wang Shaohua Gu Aiyue Huang Haitao Cheng Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo Polymer Testing Biological material Bamboo Alkali treatment Fracture |
| title | Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| title_full | Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| title_fullStr | Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| title_full_unstemmed | Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| title_short | Effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| title_sort | effects of alkali treatment on the bending and fracture behavior of biomaterial bamboo |
| topic | Biological material Bamboo Alkali treatment Fracture |
| url | http://www.sciencedirect.com/science/article/pii/S0142941825000297 |
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