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Abstract <p>This study presents results aimed at developing a novel method for electrochemical induction of paramagnetic centers on the surface of carbon materials, which not only enhances adhesion between the filler and the matrix but also promotes long-term durability and preserves the initial level of interfacial contact characteristics under prolonged exposure to temperatures up to 500°C in air. Experimental results confirmed a positive correlation between the concentration of paramagnetic centers on the composite interfacial surface and its mechanical properties, specifically the flexural strength and elastic modulus. The study demonstrates that phthalonitrile oligomers combined with fibrous fillers are suitable as matrices for the fabrication of abrasive composites with high thermomechanical performance. Such composites are designed for use in components and assemblies operating under extreme conditions. The implementation of this novel surface modification method for carbon materials significantly improves the mechanical properties, thermal stability, and heat resistance of composites based on phthalonitrile matrices.</p>

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Surface Modification of Carbon Fibers as Fillers of Composite Materials Based on Phthalonitrile Binders

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • E. O. Pashchenko,
  • D. O. Savchenko,
  • S. A. Kukharenko,
  • R. M. Kurganov,
  • O. M. Kaidash,
  • O. V. Lazhevska,
  • V. M. Bychykhin,
  • S. V. Skorokhod

摘要

Abstract

This study presents results aimed at developing a novel method for electrochemical induction of paramagnetic centers on the surface of carbon materials, which not only enhances adhesion between the filler and the matrix but also promotes long-term durability and preserves the initial level of interfacial contact characteristics under prolonged exposure to temperatures up to 500°C in air. Experimental results confirmed a positive correlation between the concentration of paramagnetic centers on the composite interfacial surface and its mechanical properties, specifically the flexural strength and elastic modulus. The study demonstrates that phthalonitrile oligomers combined with fibrous fillers are suitable as matrices for the fabrication of abrasive composites with high thermomechanical performance. Such composites are designed for use in components and assemblies operating under extreme conditions. The implementation of this novel surface modification method for carbon materials significantly improves the mechanical properties, thermal stability, and heat resistance of composites based on phthalonitrile matrices.