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<p>Poly(lactic acid) (PLA) is a promising biopolymer for additive manufacturing applications. Antioxidants are commonly used in polymer industry to prevent thermo-oxidative degradation, and vitamin E is an option from renewable sources. A mixture of PLA and vitamin E, at concentrations of 0, 0.25, 0.50, 0.75, and 1 wt%, was prepared in the torque rheometer at 200&#xa0;°C. The production of the filaments for 3D printing was conducted in a single-screw extruder. The materials were characterized using the Melt Flow Index (MFI), Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC), and Oxidative Induction Time (OIT) methods. 3D-printed parts were analyzed using Fourier Transform Infrared Spectroscopy (FTIR), parallel plate rheometry, and colorimetric analysis. The results indicated that adding vitamin E did not affect the material’s melt flow index (MFI), despite decreasing its complex viscosity and modifying its storage and loss modulus. Furthermore, incorporating vitamin E at concentrations of up to 0.75 wt% helped the material resist thermal degradation, as evidenced by the thermogravimetric analysis results. Regarding the antioxidant properties of the modified material, the OIT test revealed that a concentration of 0.5 wt% provided the best stability. Additionally, colorimetric analysis showed no significant variation for vitamin E concentrations above 0.75 wt% in the polymer.</p>

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Incorporation of vitamin E in poly(lactic acid) filaments: a 3D printing study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月1日

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  • Lara Murakava,
  • Jéssica Sant’Anna da Cruz,
  • Alcione Alves de Freitas,
  • Marcos Vinicius Lorevice,
  • Markus Schmid,
  • Marina Fernandes Cosate de Andrade

摘要

Poly(lactic acid) (PLA) is a promising biopolymer for additive manufacturing applications. Antioxidants are commonly used in polymer industry to prevent thermo-oxidative degradation, and vitamin E is an option from renewable sources. A mixture of PLA and vitamin E, at concentrations of 0, 0.25, 0.50, 0.75, and 1 wt%, was prepared in the torque rheometer at 200 °C. The production of the filaments for 3D printing was conducted in a single-screw extruder. The materials were characterized using the Melt Flow Index (MFI), Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC), and Oxidative Induction Time (OIT) methods. 3D-printed parts were analyzed using Fourier Transform Infrared Spectroscopy (FTIR), parallel plate rheometry, and colorimetric analysis. The results indicated that adding vitamin E did not affect the material’s melt flow index (MFI), despite decreasing its complex viscosity and modifying its storage and loss modulus. Furthermore, incorporating vitamin E at concentrations of up to 0.75 wt% helped the material resist thermal degradation, as evidenced by the thermogravimetric analysis results. Regarding the antioxidant properties of the modified material, the OIT test revealed that a concentration of 0.5 wt% provided the best stability. Additionally, colorimetric analysis showed no significant variation for vitamin E concentrations above 0.75 wt% in the polymer.