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<p>Polylactic acid (PLA) is highly regarded among polymeric materials due to its versatile properties, making it suitable for a variety of applications. This study aimed to functionalize pure PLA by blending it with gum Arabic (GA) through electrospinning, a technique recognized for producing nanofibrous materials with enhanced characteristics. The research further assessed the mechanical and microstructural properties of PLA/GA composites using a range of analytical methods, including tensile testing, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). A thorough analysis of the results indicated that the electrospinning technique successfully produced bead-free nanofibers. The introduction of 5 wt% GA and higher concentrations resulted in a slight increase in the formation of sharp Bragg peaks while significantly reducing the XRD intensity of the PLA/GA composites by approximately 93%, reflecting an overall decrease in the crystallinity of the composite. This reduction notably affected the ultimate tensile strength (UTS), which dropped by around 49% below the 5 wt% GA addition, while ductility experienced an increase of about 78%. Moreover, the incorporation of GA transformed the smooth surface morphology of pure PLA into a rougher texture in the PLA/GA composite across all considered GA concentrations, further indicating a decrease in crystallinity and an increase in the amorphous character of the material.</p>

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Evaluation of the mechanical, thermal, and microstructural behaviour of gum Arabic reinforced polylactide (PLA) composite

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月6日

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  • Victoria Dumebi Obasa,
  • Oludolapo Akanni Olanrewaju,
  • Isaiah Oluwaseun Owoyemi,
  • Samson Oluropo Adeosun

摘要

Polylactic acid (PLA) is highly regarded among polymeric materials due to its versatile properties, making it suitable for a variety of applications. This study aimed to functionalize pure PLA by blending it with gum Arabic (GA) through electrospinning, a technique recognized for producing nanofibrous materials with enhanced characteristics. The research further assessed the mechanical and microstructural properties of PLA/GA composites using a range of analytical methods, including tensile testing, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). A thorough analysis of the results indicated that the electrospinning technique successfully produced bead-free nanofibers. The introduction of 5 wt% GA and higher concentrations resulted in a slight increase in the formation of sharp Bragg peaks while significantly reducing the XRD intensity of the PLA/GA composites by approximately 93%, reflecting an overall decrease in the crystallinity of the composite. This reduction notably affected the ultimate tensile strength (UTS), which dropped by around 49% below the 5 wt% GA addition, while ductility experienced an increase of about 78%. Moreover, the incorporation of GA transformed the smooth surface morphology of pure PLA into a rougher texture in the PLA/GA composite across all considered GA concentrations, further indicating a decrease in crystallinity and an increase in the amorphous character of the material.