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Abstract <p>In this work, flexible poly(<i>L</i>-lactide)-<i>b</i>-poly(ethylene glycol)-<i>b</i>-poly(<i>L</i>-lactide) (PLA-PEG-PLA) composites incorporated with non-activated coconut-shell biochar (BC) and activated coconut-shell biochar (ABC) were successfully prepared through melt blending. Scanning electron microscopy (SEM) indicates that all the composites showed good phase compatibility, suggesting strong interfacial adhesion between the PLA-PEG-PLA matrix and both the biochar types. Differential scanning calorimetry (DSC) demonstrated that the composites containing 0.5 wt % biochar exhibited the highest crystallinity for both BC and ABC. When the biochar content exceeded 0.5 wt %, the effectiveness of biochar as a nucleating agent diminished due to the restriction of chain mobility in PLA-PEG-PLA. Thermal stability from thermogravimetric analysis (TGA) and mechanical properties from tensile tests of the composites were improved by the addition of these biochars. The 0.5 wt % biochar yielded the highest maximum tensile strength and Young’s modulus values of the composites. The DSC, TGA, and tensile results indicate that BC has a high potential to be used as nucleating, thermal stabilizing, and reinforcing agents for PLA-PEG-PLA compared to the ABC.</p>

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Influence of Non-Activated and Activated Biochar on Properties of Flexible Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) Bioplastic

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • Theeraphol Phromsopha,
  • Prasong Srihanam,
  • Yodthong Baimark

摘要

Abstract

In this work, flexible poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) (PLA-PEG-PLA) composites incorporated with non-activated coconut-shell biochar (BC) and activated coconut-shell biochar (ABC) were successfully prepared through melt blending. Scanning electron microscopy (SEM) indicates that all the composites showed good phase compatibility, suggesting strong interfacial adhesion between the PLA-PEG-PLA matrix and both the biochar types. Differential scanning calorimetry (DSC) demonstrated that the composites containing 0.5 wt % biochar exhibited the highest crystallinity for both BC and ABC. When the biochar content exceeded 0.5 wt %, the effectiveness of biochar as a nucleating agent diminished due to the restriction of chain mobility in PLA-PEG-PLA. Thermal stability from thermogravimetric analysis (TGA) and mechanical properties from tensile tests of the composites were improved by the addition of these biochars. The 0.5 wt % biochar yielded the highest maximum tensile strength and Young’s modulus values of the composites. The DSC, TGA, and tensile results indicate that BC has a high potential to be used as nucleating, thermal stabilizing, and reinforcing agents for PLA-PEG-PLA compared to the ABC.