Electrical and mechanical properties of carbon nanotube-epoxy nanocomposites
Piyush R. Thakre
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Search for more papers by this authorYordanos Bisrat
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Search for more papers by this authorCorresponding Author
Dimitris C. Lagoudas
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141===Search for more papers by this authorPiyush R. Thakre
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Search for more papers by this authorYordanos Bisrat
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Search for more papers by this authorCorresponding Author
Dimitris C. Lagoudas
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141
Department of Aerospace Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3141===Search for more papers by this authorAbstract
In this work, electrical conductivity and thermo-mechanical properties have been measured for carbon nanotube reinforced epoxy matrix composites. These nanocomposites consisted of two types of nanofillers, single walled carbon nanotubes (SW-CNT) and electrical grade carbon nanotubes (XD-CNT). The influence of the type of nanotubes and their corresponding loading weight fraction on the microstructure and the resulting electrical and mechanical properties of the nanocomposites have been investigated. The electrical conductivity of the nanocomposites showed a significantly high, about seven orders of magnitude, improvement at very low loading weight fractions of nanotubes in both types of nanocomposites. The percolation threshold in nanocomposites with SW-CNT fillers was found to be around 0.015 wt % and that with XD-CNT fillers around 0.0225 wt %. Transmission optical microscopy of the nanocomposites revealed some differences in the microstructure of the two types of nanocomposites which can be related to the variation in the percolation thresholds of these nanocomposites. The mechanical properties (storage modulus and loss modulus) and the glass transition temperature have not been compromised with the addition of fillers compared with significant enhancement of electrical properties. The main significance of these results is that XD-CNTs can be used as a cost effective nanofiller for electrical applications of epoxy based nanocomposites at a fraction of SW-CNT cost. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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