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Title: Temperature dependence of electrical conductivity in double-wall and multi-wall carbon nanotube/polyester nanocomposites
Authors: Şimşek, Yılmaz
Özyüzer, Lütfi
Seyhan, Abdullah Tuğrul
Tanoğlu, Metin
Schulte, Karl
Keywords: Nanocomposites
Carbon nanotubes
Electric conductivity
Metallic regions models
Issue Date: Dec-2007
Publisher: Springer Verlag
Source: Şimşek, Y., Özyüzer, L., Seyhan, A. T., Tanoğlu, M., and Schulte, K. (2007). Temperature dependence of electrical conductivity in double-wall and multi-wall carbon nanotube/polyester nanocomposites. Journal of Materials Science, 42(23), 9689-9695. doi:10.1007/s10853-007-1943-9
Abstract: The aim of this study is to investigate temperature dependence of electrical conductivity of carbon nanotube (CNT)/polyester nanocomposites from room temperature to 77 K using four-point probe test method. To produce nanocomposites, various types and amounts of CNTs (0.1, 0.3 and 0.5 wt.%) were dispersed via 3-roll mill technique within a specially formulized resin blend of thermoset polyesters. CNTs used in the study include multi walled carbon nanotubes (MWCNT) and double-walled carbon nanotubes (DWCNT) with and without amine functional groups (-NH2). It was observed that the incorporation of carbon nanotubes into resin blend yields electrically percolating networks and electrical conductivity of the resulting nanocomposites increases with increasing amount of nanotubes. However, nanocomposites containing amino functionalized carbon nanotubes exhibit relatively lower electrical conductivity compared to those with non-functionalized carbon nanotubes. To get better interpretation of the mechanism leading to conductive network via CNTs with and without amine functional groups, the experimental results were fitted to fluctuation-induced tunneling through the barriers between the metallic regions model. It was found that the results are in good agreement with prediction of proposed model.
ISSN: 0022-2461
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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