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Thermal, mechanical and acoustic damping properties of flexible open-cell polyurethane/multi-walled carbon nanotube foams: Effect of surface functionality of nanotubes

Bandarian, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/pi.2971
  3. Abstract:
  4. This article demonstrates the properties of open-cell flexible polyurethane foams incorporating multi-walled carbon nanotubes. Three different types of highly functionalized nanotubes having carboxyl, hydroxyl and amide functional groups were synthesized. Neat polyurethane foam and three nanocomposite foams filled with 0.1 wt% of treated nanotubes were prepared. It was found that thermal stability, mechanical properties and acoustic damping were improved significantly by incorporation of small amounts of nanotubes. The nanotubes modified with carboxyl groups were found to have much more influence compared to the other two functional groups, possibly due to better interfacial interaction and improved dispersion. Scanning electron microscopy revealed micro-cells with average diameters less than 5 μm in the skeleton of foams filled with nanotubes modified with hydroxyl and carboxyl, the formation of which was attributed to the generation of gaseous materials through the reaction with isocyanate. Such micro-cells were found to be influential in improving mechanical and acoustic damping
  5. Keywords:
  6. Polyurethane ; Acoustic damping ; Amide functional group ; Average diameter ; Carboxyl groups ; Flexible Polyurethanes ; Functionalized nanotubes ; Interfacial interaction ; Micro cell ; Nanocomposite foams ; Open-cell ; Polyurethane Foam ; Surface functionalities ; Thermal stability ; Amides ; Biomechanics ; Carbon nanotubes ; Damping ; Functional groups ; Mechanical properties ; Multiwalled carbon nanotubes (MWCN) ; Nanocomposites ; Rigid foamed plastics ; Scanning electron microscopy ; Foams
  7. Source: Polymer International ; Volume 60, Issue 3 , NOV , 2011 , Pages 475-482 ; 09598103 (ISSN)
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/pi.2971/abstract;jsessionid=4B34C511BF1AF53CCF4860DF9B1C38EF.f01t04