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Core-Shell Structured Polyamide 66 Nanofibers with Enhanced Flame Retardancy.

Linhong Xiao1, Linli Xu1, Yuying Yang2

  • 1Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China.

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Flame-retardant polymer nanofibers were created using coaxial electrospinning of polyamide 66 (PA 66) and nanoscale graphene hybridized with red phosphorus (NG-RP). This method improved flame retardancy and mechanical properties for diverse applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Polyamide 66 (PA 66) is a widely used engineering thermoplastic.
  • Developing effective flame-retardant materials is crucial for safety in various applications.
  • Nanomaterials offer unique properties for enhancing polymer performance.

Purpose of the Study:

  • To prepare flame-retardant polymer nanofibers using a coaxial electrospinning technique.
  • To investigate the effect of nanoscale graphene hybridized with red phosphorus (NG-RP) on the properties of PA 66 nanofibers.
  • To evaluate the flame retardancy and mechanical enhancements of the resulting nanofibers.

Main Methods:

  • Coaxial electrospinning of PA 66 and NG-RP.
  • Characterization using Transmission Electron Microscopy (TEM) and Energy-Dispersive X-ray Spectroscopy (EDS).
  • Evaluation of flame retardancy via Thermal Gravimetric Analysis (TGA), Micro Combustion Calorimetry (MCC), and vertical flame tests.

Main Results:

  • Successfully fabricated core-shell nanofibers with an NG-RP core and PA 66 shell.
  • Demonstrated significantly enhanced flame retardancy of the nanofibers.
  • Observed improvements in mechanical properties without compromising the aesthetic qualities of the polymer.

Conclusions:

  • Coaxial electrospinning of PA 66 with NG-RP is an effective method for creating advanced flame-retardant nanofibers.
  • The NG-RP core enhances both flame retardancy and mechanical strength.
  • The developed nanofibers are suitable for applications requiring high performance and safety.