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<p>This paper investigates the synergistic effects of heat treatment degrees, chemical or mechanical extraction methods, and the presence of bamboo nodes on the mechanical properties of bamboo fiber bundles. Chemically extracted fiber bundles exhibited higher tensile strength from 248.9 to 530.9&#xa0;MPa, compared with mechanically extracted fiber bundles (average 37.5&#xa0;MPa), however, the latter retained the native bamboo structure. Experimental results indicate that deep heat treatment (140&#xa0;℃, 110&#xa0;min) preserves tensile strengths in internodal and nodal bamboo fiber bundles. Medium heated reduces the strengths from non heated group. Scanning electron microscopy reveals microscopic difference between the bamboo bundles with different extraction methods. Fourier-transform infrared spectra show the changes in terms of chemical components following heat treatment and the presence of different types of nodes. High-resolution X-ray microtomography (μCT) images are also used to reconstruct the arrangement of bamboo fiber bundles. A fiber density-tensile strength correlation model based on image analysis is proposed, offering a novel methodology for non-destructive evaluation of mechanical properties of bamboo.</p>

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Heat treated bamboo fiber bundles

  • 期刊论文

  • 发表日期：

    2025年4月15日

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  • Chuqiao Chen,
  • Qicheng Zhang,
  • Jingxuan Chen,
  • Sijie Zhang,
  • Chenxu Zhao,
  • Fabrizio Scarpa,
  • Yan Xiao

摘要

This paper investigates the synergistic effects of heat treatment degrees, chemical or mechanical extraction methods, and the presence of bamboo nodes on the mechanical properties of bamboo fiber bundles. Chemically extracted fiber bundles exhibited higher tensile strength from 248.9 to 530.9 MPa, compared with mechanically extracted fiber bundles (average 37.5 MPa), however, the latter retained the native bamboo structure. Experimental results indicate that deep heat treatment (140 ℃, 110 min) preserves tensile strengths in internodal and nodal bamboo fiber bundles. Medium heated reduces the strengths from non heated group. Scanning electron microscopy reveals microscopic difference between the bamboo bundles with different extraction methods. Fourier-transform infrared spectra show the changes in terms of chemical components following heat treatment and the presence of different types of nodes. High-resolution X-ray microtomography (μCT) images are also used to reconstruct the arrangement of bamboo fiber bundles. A fiber density-tensile strength correlation model based on image analysis is proposed, offering a novel methodology for non-destructive evaluation of mechanical properties of bamboo.