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<p>Fused deposition modeling (FDM) was employed in this work to fabricate polylactic acid/graphene/clay (PLA/Clay/GPN) nanocomposites, with the objective of simultaneously improving the flexural strength and tensile elastic modulus of the printed parts. For this purpose, the Taguchi design of experiments coupled with gray relational analysis was utilized to determine the optimal parameters, including graphene and clay contents, print speed, and nozzle temperature. The morphological and thermal properties of the resulting nanocomposites were then evaluated through SEM, TGA, and DSC. The findings indicated that the incorporation of graphene and clay nanoparticles enhanced the thermal stability of the PLA/Clay/GPN nanocomposite by about 11%. According to the Taguchi analysis, clay content (35.9% contribution) and nozzle temperature (33.8% contribution) were the most significant parameters in improving the flexural strength and elastic modulus. Furthermore, the gray relational analysis identified an optimal parameter set of 2&#xa0;wt.% clay, 1&#xa0;wt.% graphene, a 30 mm/s print speed, and a 215&#xa0;°C nozzle temperature, which yielded the maximum flexural strength and elastic modulus of 58.1&#xa0;MPa and 3.892&#xa0;GPa, respectively.</p>

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Optimizing the Flexural Strength and Elastic Modulus of Polylactic Acid/Clay/Graphene Nanocomposite Produced by Additive Manufacturing Process

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Walid M. Shewakh,
  • Hussam H. Noor,
  • Khaled Abdullah Alnefaie,
  • Naif Alsaadi,
  • Ishraga GalalEldin Abdalla Awad,
  • Ripendeep Singh,
  • Alaa H. Abdulmutalib

摘要

Fused deposition modeling (FDM) was employed in this work to fabricate polylactic acid/graphene/clay (PLA/Clay/GPN) nanocomposites, with the objective of simultaneously improving the flexural strength and tensile elastic modulus of the printed parts. For this purpose, the Taguchi design of experiments coupled with gray relational analysis was utilized to determine the optimal parameters, including graphene and clay contents, print speed, and nozzle temperature. The morphological and thermal properties of the resulting nanocomposites were then evaluated through SEM, TGA, and DSC. The findings indicated that the incorporation of graphene and clay nanoparticles enhanced the thermal stability of the PLA/Clay/GPN nanocomposite by about 11%. According to the Taguchi analysis, clay content (35.9% contribution) and nozzle temperature (33.8% contribution) were the most significant parameters in improving the flexural strength and elastic modulus. Furthermore, the gray relational analysis identified an optimal parameter set of 2 wt.% clay, 1 wt.% graphene, a 30 mm/s print speed, and a 215 °C nozzle temperature, which yielded the maximum flexural strength and elastic modulus of 58.1 MPa and 3.892 GPa, respectively.