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<p>In this work, PLA/silica nanocomposites have been prepared using an FDM-based 3D printer from nanocomposite filament. The nanocomposite filament was prepared using a single-screw filament extruder. Filaments were chopped and extruded multiple times till the third cycle for better dispersion of silica nanoparticles. The effect of multiple extrusion cycles and printing temperature on the physical and mechanical properties of 3D-printed nanocomposite samples has been investigated. The physical and mechanical properties of the 3D-printed nanocomposites were investigated. The experimental observations found that the incorporation of silica nanoparticles at 1&#xa0;wt.% with poly-lactic-acid (PLA), extruded through the first cycle, and printed at 230&#xa0;°C significantly improved the maximum tensile strength, tensile strain, and tensile modulus by 22.6, 6.1, and 18.2%, respectively, the out-of-plane maximum flexural strength, flexural strain, and flexural modulus of the same samples were enhanced by 122.6, 53.3, and 45.6% respectively, and maximum compression strength, compressive strain, and compressive modulus were enhanced by 19.3, 5.00, and 77.7%, respectively, compared to neat PLA samples. The fracture surface investigated under an optical microscope and FESEM revealed that neat PLA samples are relatively brittle and have better load transfer between filler and matrix at 1&#xa0;wt.% silica, resulting in maximum mechanical properties improves filament flow during printing, as confirmed by MFI analysis.</p>

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Investigation of Mechanical Properties of Silica Nanocomposites Prepared by FDM-Based 3D-Printing of Multi-extruded Nano-filaments

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Sanjeev Kumar,
  • Nazrul Islam Khan,
  • Pradeep Khanna

摘要

In this work, PLA/silica nanocomposites have been prepared using an FDM-based 3D printer from nanocomposite filament. The nanocomposite filament was prepared using a single-screw filament extruder. Filaments were chopped and extruded multiple times till the third cycle for better dispersion of silica nanoparticles. The effect of multiple extrusion cycles and printing temperature on the physical and mechanical properties of 3D-printed nanocomposite samples has been investigated. The physical and mechanical properties of the 3D-printed nanocomposites were investigated. The experimental observations found that the incorporation of silica nanoparticles at 1 wt.% with poly-lactic-acid (PLA), extruded through the first cycle, and printed at 230 °C significantly improved the maximum tensile strength, tensile strain, and tensile modulus by 22.6, 6.1, and 18.2%, respectively, the out-of-plane maximum flexural strength, flexural strain, and flexural modulus of the same samples were enhanced by 122.6, 53.3, and 45.6% respectively, and maximum compression strength, compressive strain, and compressive modulus were enhanced by 19.3, 5.00, and 77.7%, respectively, compared to neat PLA samples. The fracture surface investigated under an optical microscope and FESEM revealed that neat PLA samples are relatively brittle and have better load transfer between filler and matrix at 1 wt.% silica, resulting in maximum mechanical properties improves filament flow during printing, as confirmed by MFI analysis.