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<p>The effects of power and time on the surface modification of carbon nanofibers (CNF) were studied through plasma polymerization of ethylene. Power is found to be crucial in the coating deposition, as it is directly related to the energy applied during polymerization. Through infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and Raman spectra it was determined that the optimal plasma modification conditions were 100&#xa0;W and 45&#xa0;min, resulting in the greatest coating on CNF. TEM micrographs were obtained to study the morphological changes in the CNF coated with ethylene plasma and we detected coating thicknesses between 5.8 and 10.2&#xa0;nm. The nanocomposites were prepared using linear low-density polyethylene/cyclic olefin copolymer (LLDPE/COC) and CNF modified with ethylene plasma (CNF4) at 1%, 2% and 3% by weights. Scanning electron microscopy (SEM) revealed a homogeneous dispersion of COC spheres in the LLDPE, while the CNF was found confined within the LLDPE. In mechanical tests, the incorporation of 2% and 3% CNF4 improved the elastic modulus, achieving values between 690–800&#xa0;MPa, and impact resistance increased by 20% using 2% CNF4, compared to the LLDPE/COC blend. This study aims to obtain a material based on LLDPE/COC/CNF as an alternative to UHMWPE.</p> Graphical abstract <p></p>

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Plasma-induced modification of carbon nanofiber for enhanced compatibilization and reinforcement of linear low-density polyethylene

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Priscila Espinoza-Ibarra,
  • Saul Sánchez-Valdés,
  • Julieta Torres-González,
  • Rachel Faverzani Magnago,
  • Afonso Henrique Da Silva Junior,
  • Adriano Da Silva,
  • M. M. Da Silva Paula,
  • Luciano Da-Silva

摘要

The effects of power and time on the surface modification of carbon nanofibers (CNF) were studied through plasma polymerization of ethylene. Power is found to be crucial in the coating deposition, as it is directly related to the energy applied during polymerization. Through infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and Raman spectra it was determined that the optimal plasma modification conditions were 100 W and 45 min, resulting in the greatest coating on CNF. TEM micrographs were obtained to study the morphological changes in the CNF coated with ethylene plasma and we detected coating thicknesses between 5.8 and 10.2 nm. The nanocomposites were prepared using linear low-density polyethylene/cyclic olefin copolymer (LLDPE/COC) and CNF modified with ethylene plasma (CNF4) at 1%, 2% and 3% by weights. Scanning electron microscopy (SEM) revealed a homogeneous dispersion of COC spheres in the LLDPE, while the CNF was found confined within the LLDPE. In mechanical tests, the incorporation of 2% and 3% CNF4 improved the elastic modulus, achieving values between 690–800 MPa, and impact resistance increased by 20% using 2% CNF4, compared to the LLDPE/COC blend. This study aims to obtain a material based on LLDPE/COC/CNF as an alternative to UHMWPE.

Graphical abstract