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<p>This study examines the impact of alkaline treatment on the mechanical, thermal, and morphological properties of sugar palm fiber (SPF)-reinforced thermoplastic polyurethane (TPU) composites. SPF fibers (250&#xa0;μm) were treated with sodium hydroxide (NaOH) solutions of 0%, 2%, 4%, and 6% (w/w) for 90&#xa0;min at room temperature. These fibers were then mixed with TPU in an extruder at 180–200&#xa0;°C and molded into composite sheets using compression molding at 190&#xa0;°C, 10&#xa0;MPa pressure, and a 10-minute holding time. X-ray diffraction (XRD) revealed increased crystallinity in the composites, peaking at 1589 cps with 6% NaOH. Fourier transform infrared (FTIR) spectra showed improved fiber-matrix compatibility, most evident with 2% NaOH. SEM analysis indicated cleaner and rougher fiber surfaces post-treatment, though cracks were observed at higher concentrations. Energy-dispersive X-ray (EDX) confirmed increased oxygen content and sodium residue at elevated NaOH levels, reflecting lignin removal. Thermogravimetric analysis (TGA) demonstrated enhanced thermal stability, with the highest residue mass of 599.16&#xa0;°C at 6% NaOH. Alkaline treatment notably enhanced SPF/TPU composites, with 2% NaOH providing optimal flexural strength and 6% NaOH maximizing impact strength and thermal stability.</p>

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Effect of alkaline treatment on the thermal and mechanical properties of sugar palm fibre reinforced thermoplastic polyurethane composites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月23日

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  • Dandi Bachtiar,
  • Ausama Abbas Mohammed,
  • Sivasubramanian Palanisamy,
  • Al Ichlas Imran,
  • Januar Parlaungan Siregar,
  • Mohd Ruzaimi bin Mat Rejab,
  • Syaubari Syaubari,
  • Tezara Cionita,
  • Deni Fajar Fitriyana,
  • Saleh A Al-Farraj,
  • Mansour I Almansour,
  • Quanjin Ma

摘要

This study examines the impact of alkaline treatment on the mechanical, thermal, and morphological properties of sugar palm fiber (SPF)-reinforced thermoplastic polyurethane (TPU) composites. SPF fibers (250 μm) were treated with sodium hydroxide (NaOH) solutions of 0%, 2%, 4%, and 6% (w/w) for 90 min at room temperature. These fibers were then mixed with TPU in an extruder at 180–200 °C and molded into composite sheets using compression molding at 190 °C, 10 MPa pressure, and a 10-minute holding time. X-ray diffraction (XRD) revealed increased crystallinity in the composites, peaking at 1589 cps with 6% NaOH. Fourier transform infrared (FTIR) spectra showed improved fiber-matrix compatibility, most evident with 2% NaOH. SEM analysis indicated cleaner and rougher fiber surfaces post-treatment, though cracks were observed at higher concentrations. Energy-dispersive X-ray (EDX) confirmed increased oxygen content and sodium residue at elevated NaOH levels, reflecting lignin removal. Thermogravimetric analysis (TGA) demonstrated enhanced thermal stability, with the highest residue mass of 599.16 °C at 6% NaOH. Alkaline treatment notably enhanced SPF/TPU composites, with 2% NaOH providing optimal flexural strength and 6% NaOH maximizing impact strength and thermal stability.