Thermal conductivity of carbon nanoreinforced epoxy composites

• Κύριοι συγγραφείς: Κωσταγιαννακοπούλου, Χριστίνα, Φιαμέγκου, Ελένη, Σωτηριάδης, Γιώργος, Κωστόπουλος, Βασίλης
• Άλλοι συγγραφείς: Kostagiannakopoulou, Christina
• Μορφή: Journal (paper)
• Γλώσσα: English
• Έκδοση: 2018
• Θέματα: Multiwalled carbon nanotubes; Graphite nanoplatelets; Thermal conductivity; Nanoreinforced polymers; Nanomodified carbon fiber epoxy composites; OpenAIRE post grant pilot; Νανοσωλήνες άνθρακα πολλαπλών τοιχωμάτων; Γραφιτικά νανοεπίπεδα; Θερμική αγωγιμότητα

The present study attempts to investigate the influence of multiwalled carbon nanotubes (MWCNTs) and graphite nanoplatelets (GNPs) on thermal conductivity (TC) of nanoreinforced polymers and nanomodified carbon fiber epoxy composites (CFRPs). Loading levels from 1 to 3%wt. of MWCNTs and from1 to 15%wt. of GNPs were used.The results indicate that TC of nanofilled epoxy composites increased with the increase of GNP content. Quantitatively, 176% and 48% increase of TC were achieved in nanoreinforced polymers and nanomodified CFRPs, respectively, with the addition of 15% wt. GNPs into the epoxy matrix. Finally, micromechanical models were applied in order to predict analytically the TC of polymers and CFRPs. Lewis Nielsen model with optimized parameters provides results very close to the experimental ones in the case of polymers. As far as the composites are concerned, the Hashin and Clayton models proved to be sufficiently accurate for the prediction at lower filler contents.