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<p>This study investigates the enhancement of PLA-based composites through the incorporation of biosilica particles extracted from proso millet husk. The primary aim of this study is to analyse how the addition of proso millet husk derived biosilica performs in the load bearing behaviour. To evaluate this, customized filaments contains varying biosilica were produced and fabricated into composite plates via 3D printing. According to results, among the tested samples, specimen A3 (2 wt% biosilica) exhibited the best mechanical performance, attributed to uniform filler dispersion and strong matrix-filler bonding. Moreover, composite A3 showed the longest fatigue life counts of 39.9 × 10<sup>3</sup> for 75% of ultimate tensile stress. In terms of wear performance, composite A4 (4 wt% biosilica) demonstrated the lowest specific wear rate (0.043&#xa0;mm³/Nm) and coefficient of friction (0.3), although it also recorded the highest water absorption (0.27%), indicating increased hydrophilicity. SEM analysis confirmed good filler dispersion at lower biosilica content, while higher loading led to particle agglomeration. These results suggest that biosilica-reinforced PLA composites offer promising potential for eco-friendly, high-performance applications in fields such as biomedical devices, automotive components, drones, and construction materials.</p>

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Evaluation of additively manufactured PLA-proso millet husk biosilica biocomposite and its mechanical performance as human prosthetic clavicle in bone regeneration application

  • 期刊论文

  • 发表日期：

    2025年6月20日

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  • B. Suresh Chander Kapali,
  • Ushus S. Kumar,
  • S. Uma Maheswari,
  • B. Chinthamani

摘要

This study investigates the enhancement of PLA-based composites through the incorporation of biosilica particles extracted from proso millet husk. The primary aim of this study is to analyse how the addition of proso millet husk derived biosilica performs in the load bearing behaviour. To evaluate this, customized filaments contains varying biosilica were produced and fabricated into composite plates via 3D printing. According to results, among the tested samples, specimen A3 (2 wt% biosilica) exhibited the best mechanical performance, attributed to uniform filler dispersion and strong matrix-filler bonding. Moreover, composite A3 showed the longest fatigue life counts of 39.9 × 103 for 75% of ultimate tensile stress. In terms of wear performance, composite A4 (4 wt% biosilica) demonstrated the lowest specific wear rate (0.043 mm³/Nm) and coefficient of friction (0.3), although it also recorded the highest water absorption (0.27%), indicating increased hydrophilicity. SEM analysis confirmed good filler dispersion at lower biosilica content, while higher loading led to particle agglomeration. These results suggest that biosilica-reinforced PLA composites offer promising potential for eco-friendly, high-performance applications in fields such as biomedical devices, automotive components, drones, and construction materials.