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<p>The present study evaluated cement-based composites reinforced with chicken feather fiber (CP) and extracted keratin (CQ) at concentrations of 0.5–1.5%. Mechanical test revealed that CP 0.5% exhibited the best performance, achieving 35&#xa0;MPa and 8% deformation, while higher fiber contents reduced strength due to agglomeration. In contrast, CQ composites did not surpass plain cement in strength but showed improved deformation, likely influenced by keratin porosity. FTIR analysis identified characteristic functional groups (C–S bonds, aliphatic zone, carbonates, and Si–O vibrations) without evidence of chemical interactions. SEM micrographs confirmed uniform fiber dispersion in CP 0.5%, enhancing load transfer, whereas CQ at higher concentrations presented porosity and weak zones. TGA-DTG analysis revealed three main decomposition stages: water loss at 30–200&#xa0;°C, keratin degradation and partial Ca(OH)<sub>2</sub> dehydroxylation (200–400&#xa0;°C), and the organic part decomposition at 400–1000&#xa0;°C. Overall, it is concluded that CP composites at low concentrations improved both strength and ductility of the cement matrix.</p> Graphical abstract <p></p>

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Physicochemical characterization of a composite material using poultry waste

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • Alfredo Olarte-Paredes,
  • Gloria Denisse Velázquez-Velasco,
  • René Salgado-Delgado,
  • Ulises León-Silva,
  • Areli Marlen Salgado-Delgado,
  • Ramiro De Aquino-García

摘要

The present study evaluated cement-based composites reinforced with chicken feather fiber (CP) and extracted keratin (CQ) at concentrations of 0.5–1.5%. Mechanical test revealed that CP 0.5% exhibited the best performance, achieving 35 MPa and 8% deformation, while higher fiber contents reduced strength due to agglomeration. In contrast, CQ composites did not surpass plain cement in strength but showed improved deformation, likely influenced by keratin porosity. FTIR analysis identified characteristic functional groups (C–S bonds, aliphatic zone, carbonates, and Si–O vibrations) without evidence of chemical interactions. SEM micrographs confirmed uniform fiber dispersion in CP 0.5%, enhancing load transfer, whereas CQ at higher concentrations presented porosity and weak zones. TGA-DTG analysis revealed three main decomposition stages: water loss at 30–200 °C, keratin degradation and partial Ca(OH)2 dehydroxylation (200–400 °C), and the organic part decomposition at 400–1000 °C. Overall, it is concluded that CP composites at low concentrations improved both strength and ductility of the cement matrix.

Graphical abstract