Anisotropic conductivity of magnetic carbon nanotubes embedded in epoxy matrices

作者：Kim Il Tae; Tannenbaum Allen; Tannenbaum Rina^*

来源：Carbon, 2011, 49(1): 54-61.

DOI：10.1016/j.carbon.2010.08.041

Maghemite (7-Fe(2)O(3))/multi walled carbon nanotubes (MWCNTs) hybrid-materials were synthesized and their anisotropic electrical conductivities as a result of their alignment in a polymer matrix under an external magnetic field were investigated The tethering of gamma Fe(2)O(3) nanoparticles on the surface of MWCNT was achieved by a modified sol-gel reaction, where sodium dodecylbenzene sulfonate (NaDDBS) was used in order to inhibit the formation of a 3D iron oxide gel These hybrid materials, specifically, magnetized multi walled carbon nanotubes (m MWCNTs) were readily aligned parallel to the direction of a magnetic field even when using a relatively weak magnetic field The conductivity of the epoxy composites formed in this manner increased with increasing m MWCNT mass fraction in the polymer matrix Furthermore, the conductivities parallel to the direction of magnetic field were higher than those in the perpendicular direction, indica

• 出版日期2011-1