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This study explores the impact of Vacuum Pressure Impregnation (VPI), alkali, tannic acid, and phosphoric acid treatments on the mechanical, thermal, and tribological properties of bamboo fiber-based composites. Thermogravimetric analysis (TGA) reveals that phosphoric acid-treated fibers exhibit the highest thermal stability due to phosphorus-based cross-linking, while NaOH-treated fibers show the lowest resistance. X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy highlight structural and chemical modifications, with NaOH enhancing crystallinity, tannic acid improving surface bonding, and phosphoric acid introducing flame-retardant properties. Tensile strength analysis demonstrates peak performance at 1 wt% fiber content, with phosphoric acid-treated fibers achieving the highest strength (290.45 ± 2.85 MPa). At 1.5 wt%, strength declines due to fiber agglomeration. These findings underscore the potential of bamboo fiber composites for structural, automotive, and aerospace applications, reinforcing their role as eco-friendly, high-performance materials.

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Innovations in Vacuum Pressure Impregnation (VPI) Treatment of Bamboo Fiber for Enhanced Performance in Fiber Reinforced Polymer (FRP) Laminated Composites: Structural, Mechanical, and Thermal Advancements

  • 章节

  • 发表日期：

    2026年

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  • Yogendra Kumar Verma,
  • Amit Kumar Singh,
  • Sandeep Kumar Singh,
  • M. K. Paswan,
  • S. Prashanth

摘要

This study explores the impact of Vacuum Pressure Impregnation (VPI), alkali, tannic acid, and phosphoric acid treatments on the mechanical, thermal, and tribological properties of bamboo fiber-based composites. Thermogravimetric analysis (TGA) reveals that phosphoric acid-treated fibers exhibit the highest thermal stability due to phosphorus-based cross-linking, while NaOH-treated fibers show the lowest resistance. X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy highlight structural and chemical modifications, with NaOH enhancing crystallinity, tannic acid improving surface bonding, and phosphoric acid introducing flame-retardant properties. Tensile strength analysis demonstrates peak performance at 1 wt% fiber content, with phosphoric acid-treated fibers achieving the highest strength (290.45 ± 2.85 MPa). At 1.5 wt%, strength declines due to fiber agglomeration. These findings underscore the potential of bamboo fiber composites for structural, automotive, and aerospace applications, reinforcing their role as eco-friendly, high-performance materials.