Multifunctional highly aligned graphite nanoplatelet-polyether imide composite in film form

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Abstract

The objective of this research is to investigate the effect of adding graphite nanoplatelet (GNP) particles into polyether imide film. Extruded films were produced with various amounts of GNP and different degrees of post-extrusion stretching. A uniform high degree of alignment of the GNP particles along both machine direction (stretching) and transverse direction was obtained under high stretching ratios. Tensile properties including tensile modulus, strength and elongation were investigated. O2 permeability was reduced with the increase of GNP loading and stretching ratio of the film. The Bharadwaj model was applied to predict the permeability. Information of degree of alignment was obtained through analyzing SEM images in image-processing software and used with the Bharadwaj model, resulting in good agreement with experimental data. Annealing of the stretched films under 340 °C showed a significant improvement of both electrical and thermal conductivity in the film direction.

LanguageEnglish (US)
JournalMaterials Chemistry and Physics
DOIs
StateAccepted/In press - Nov 25 2015

Profile

Imides
Graphite
Polyethers
imides
graphite
Stretching
composite materials
Composite materials
permeability
alignment
tensile properties
Tensile properties
elongation
Extrusion
image processing
Elongation
Thermal conductivity
Image processing
thermal conductivity
Elastic moduli

Keywords

  • Annealing
  • Composite materials
  • Electron microscopy
  • Mechanical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "The objective of this research is to investigate the effect of adding graphite nanoplatelet (GNP) particles into polyether imide film. Extruded films were produced with various amounts of GNP and different degrees of post-extrusion stretching. A uniform high degree of alignment of the GNP particles along both machine direction (stretching) and transverse direction was obtained under high stretching ratios. Tensile properties including tensile modulus, strength and elongation were investigated. O2 permeability was reduced with the increase of GNP loading and stretching ratio of the film. The Bharadwaj model was applied to predict the permeability. Information of degree of alignment was obtained through analyzing SEM images in image-processing software and used with the Bharadwaj model, resulting in good agreement with experimental data. Annealing of the stretched films under 340 °C showed a significant improvement of both electrical and thermal conductivity in the film direction.",
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AB - The objective of this research is to investigate the effect of adding graphite nanoplatelet (GNP) particles into polyether imide film. Extruded films were produced with various amounts of GNP and different degrees of post-extrusion stretching. A uniform high degree of alignment of the GNP particles along both machine direction (stretching) and transverse direction was obtained under high stretching ratios. Tensile properties including tensile modulus, strength and elongation were investigated. O2 permeability was reduced with the increase of GNP loading and stretching ratio of the film. The Bharadwaj model was applied to predict the permeability. Information of degree of alignment was obtained through analyzing SEM images in image-processing software and used with the Bharadwaj model, resulting in good agreement with experimental data. Annealing of the stretched films under 340 °C showed a significant improvement of both electrical and thermal conductivity in the film direction.

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