An infiltration method for preparing single-wall nanotube/epoxy composites with improved thermal conductivity
| Autor: | Karen I. Winey, Csaba Guthy, John E. Fischer, Takashi Kashiwagi, Fangming Du |
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| Rok vydání: | 2006 |
| Předmět: |
Nanotube
Nanocomposite Materials science Polymers and Plastics Polymer nanocomposite Composite number Carbon nanotube Epoxy Condensed Matter Physics law.invention Thermal conductivity law visual_art Materials Chemistry visual_art.visual_art_medium Interfacial thermal resistance Physical and Theoretical Chemistry Composite material |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 44:1513-1519 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.20801 |
| Popis: | Recent studies of SWNT/polymer nanocomposites identify the large interfacial thermal resistance at nanotube/nanotube junctions as a primary cause for the only modest increases in thermal conductivity relative to the polymer matrix. To reduce this interfacial thermal resistance, we prepared a freestanding nanotube framework by removing the polymer matrix from a 1 wt % SWNT/PMMA composite by nitrogen gasification and then infiltrated it with epoxy resin and cured. The SWNT/epoxy composite made by this infiltration method has a micron-scale, bicontinuous morphology and much improved thermal conductivity (220% relative to epoxy) due to the more effective heat transfer within the nanotube-rich phase. By applying a linear mixing rule to the bicontinuous composite, we conclude that even at high loadings the nanotube framework more effectively transports phonons than well-dispersed SWNT bundles. Contrary to the widely accepted approaches, these findings suggest that better thermal and electrical conductivities can be accomplished via heterogeneous distributions of SWNT in polymer matrices. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 1513–1519, 2006 |
| Databáze: | OpenAIRE |
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