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<p>Chemical treatment with alkalis is one method of improving the physical, chemical, thermal and mechanical properties of plant fibers by increasing their tensile strength and modulus of elasticity while improving their adhesion to the matrix and reducing their water absorption in composite reinforcement. This study seeks to improve the physical, mechanical, and chemical properties of RC (<i>Rhecktophyllum camerunense</i>) raw fibers using 5% sodium hydroxide (NaOH) concentration for potential composite reinforcement. The fibers were characterized physically, mechanically, thermally and chemically in accordance with standard norms and protocols. The results show that the water absorption and density of RC raw fibers decreased by 45.57% and increased by 36.96%, respectively, with the 5% NaOH treatment. Morphological SEM analysis showed that RC5 fibers had a smooth, clear surface compared with RC raw fibers. The crystallinity index of the RC fibers, initially 47.8%, increased to 61.3% after alkaline treatment. Similarly, the thermal stability temperature rose from 220&#xa0;°C to 250&#xa0;°C, demonstrating the effectiveness of the alkaline treatment. The RC5 fibers had the best mechanical properties in fiber traction (strength at break (121.3&#xa0;MPa), elastic modulus (2.1 GPa), and strain (34.1%). The Weibull model two-parameter analysis allowed us to quantify the degree of dispersion in diameters and the mechanical properties of each fiber category. The fibers showed low dispersion in diameters and mechanical properties, and RC5 was found to be better. Compared to some fibers in the literature, RC5 fibers are recommended for reinforcing polymer matrices, particularly ceramic matrices such as plaster.</p>

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Characterization of untreated and alkali-treated natural fibers extracted from the aerial roots of Rhecktophyllum camerunense (RC)

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Marie Angèle Amougou Etoa,
  • Jean Atangana Ateba,
  • Jonas Peequeur Essome Mbang,
  • Pierre Marcel Anicet Noah,
  • Michel Mbere Taoga,
  • Armel Edwige Mewoli,
  • Demagna Koffi,
  • Fabien Betene Ebanda

摘要

Chemical treatment with alkalis is one method of improving the physical, chemical, thermal and mechanical properties of plant fibers by increasing their tensile strength and modulus of elasticity while improving their adhesion to the matrix and reducing their water absorption in composite reinforcement. This study seeks to improve the physical, mechanical, and chemical properties of RC (Rhecktophyllum camerunense) raw fibers using 5% sodium hydroxide (NaOH) concentration for potential composite reinforcement. The fibers were characterized physically, mechanically, thermally and chemically in accordance with standard norms and protocols. The results show that the water absorption and density of RC raw fibers decreased by 45.57% and increased by 36.96%, respectively, with the 5% NaOH treatment. Morphological SEM analysis showed that RC5 fibers had a smooth, clear surface compared with RC raw fibers. The crystallinity index of the RC fibers, initially 47.8%, increased to 61.3% after alkaline treatment. Similarly, the thermal stability temperature rose from 220 °C to 250 °C, demonstrating the effectiveness of the alkaline treatment. The RC5 fibers had the best mechanical properties in fiber traction (strength at break (121.3 MPa), elastic modulus (2.1 GPa), and strain (34.1%). The Weibull model two-parameter analysis allowed us to quantify the degree of dispersion in diameters and the mechanical properties of each fiber category. The fibers showed low dispersion in diameters and mechanical properties, and RC5 was found to be better. Compared to some fibers in the literature, RC5 fibers are recommended for reinforcing polymer matrices, particularly ceramic matrices such as plaster.