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<p>This study addresses the dual challenges of resource waste and environmental pollution caused by discarded Salix integra (SI) bark during branch processing by transforming this agricultural byproduct into a high-value material for engineering applications. SI fibers' structural and functional properties are systematically analyzed to evaluate their suitability as a renewable reinforcement matrix for green composites. The SI fibers exhibit a short but mechanically robust morphology (length: 879 ± 286&#xa0;µm; diameter: 8.3 ± 1.9&#xa0;µm), with surface prismatic calcium carbonate granules (Ca content &gt; 60%) that enhance fiber integrity. Alkaline oxygen treatment optimizes their crystallinity (78.5%) and thermal stability (initial decomposition at 375&#xa0;°C; peak degradation &gt; 400&#xa0;°C), enabling compatibility with hot-press manufacturing. Mechanically, the fibers demonstrate exceptional tensile strength (175.83 ± 28.24&#xa0;MPa) and elongation (8.50 ± 1.43%). The SI bark is a calcium-rich, thermally stable fiber source that establishes a structure–property relationship that supports its use in high-temperature composite fabrication. These results position SI fibers as a sustainable alternative for reinforcing biodegradable composites in automotive, construction, and packaging industries, aligning with circular economy principles.</p>

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Revalorization of Salix integra fiber from agricultural biomass waste for composite applications

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Changjie Chen,
  • Mengting Ke,
  • Xinyu Zhang,
  • Limin Bao,
  • Xinhou Wang

摘要

This study addresses the dual challenges of resource waste and environmental pollution caused by discarded Salix integra (SI) bark during branch processing by transforming this agricultural byproduct into a high-value material for engineering applications. SI fibers' structural and functional properties are systematically analyzed to evaluate their suitability as a renewable reinforcement matrix for green composites. The SI fibers exhibit a short but mechanically robust morphology (length: 879 ± 286 µm; diameter: 8.3 ± 1.9 µm), with surface prismatic calcium carbonate granules (Ca content > 60%) that enhance fiber integrity. Alkaline oxygen treatment optimizes their crystallinity (78.5%) and thermal stability (initial decomposition at 375 °C; peak degradation > 400 °C), enabling compatibility with hot-press manufacturing. Mechanically, the fibers demonstrate exceptional tensile strength (175.83 ± 28.24 MPa) and elongation (8.50 ± 1.43%). The SI bark is a calcium-rich, thermally stable fiber source that establishes a structure–property relationship that supports its use in high-temperature composite fabrication. These results position SI fibers as a sustainable alternative for reinforcing biodegradable composites in automotive, construction, and packaging industries, aligning with circular economy principles.