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<p>This study aims to develop sustainable PLA composites by incorporating coconut shell biochar (BC) (at 1, 2, 5 and 10 wt. %) and evaluating their mechanical, thermal, rheological, and water absorption performance. The composites exhibited enhanced tensile strength (21 to 68&#xa0;MPa), hardness (28 to 53 HV), and flexural strength (a 62.5% increase), with crystallinity increasing from 24 to 47%. Thermal analysis revealed reduced stability but a 5% increase in char residue at 500&#xa0;°C. Rheological improvements included higher storage/loss moduli and a 57% rise in damping factor. Water absorption increased with biochar content due to porosity and interfacial voids, confirmed by contact angle measurements. These results demonstrate the potential of PLA/BC composites as eco-friendly materials for packaging, agricultural films, and moisture-sensitive applications, contributing to sustainable development and greener urban environments.</p>

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Effect of Pyrolysis Derived Coconut Shell Biochar on the Mechanical, Thermal, Rheological, and Water Absorption Properties of PLA Composites

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Santosh Kumar Sahu,
  • P. S. Rama Sreekanth,
  • A. Praveen Kumar,
  • Ali El-Rayyes,
  • Nadir Ayrilmis

摘要

This study aims to develop sustainable PLA composites by incorporating coconut shell biochar (BC) (at 1, 2, 5 and 10 wt. %) and evaluating their mechanical, thermal, rheological, and water absorption performance. The composites exhibited enhanced tensile strength (21 to 68 MPa), hardness (28 to 53 HV), and flexural strength (a 62.5% increase), with crystallinity increasing from 24 to 47%. Thermal analysis revealed reduced stability but a 5% increase in char residue at 500 °C. Rheological improvements included higher storage/loss moduli and a 57% rise in damping factor. Water absorption increased with biochar content due to porosity and interfacial voids, confirmed by contact angle measurements. These results demonstrate the potential of PLA/BC composites as eco-friendly materials for packaging, agricultural films, and moisture-sensitive applications, contributing to sustainable development and greener urban environments.