Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

Nanofilled polymeric matrices have demonstrated remarkable mechanical, electrical, and thermal properties. In this article we review the processing of carbon nanotube, graphene, and clay montmorillonite platelet as potential nanofillers to form nanocomposites. The various functionalization techniques of modifying the nanofillers to enable interaction with polymers are summarized. The importance of filler dispersion in the polymeric matrix is highlighted. Finally, the challenges and future outlook for nanofilled polymeric composites are presented.

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Polymer nanocomposites-A comparison between carbon nanotubes, graphene, and clay as nanofillers

The alignment of multiwalled carbon nanotubes (MWNTs) has been accomplished through deposition of uniform layers of magnetite/maghemite nanoparticles (diameter = 6−10 nm) and use of an external magnetic field. The coating of CNTs with magnetic nanoparticles was performed by combining the polymer wrapping and layer-by-layer (LbL) assembly techniques. The particle-coated MWNTs are superparamagnetic and can be aligned at room temperature on any substrate by deposition from an aqueous solution in an external field B = 0.2 T. The volume magnetization of the particle coated MWNTs is found to be enhanced by 17% compared to the pure particles in a powder indicating that either the adsorption process onto the CNTs changes the particle magnetization, or the MWNTs carry an intrinsic magnetization due to remaining Ni used as a catalyst for the growth process.

Alignment of Carbon Nanotubes under Low Magnetic Fields through Attachment of Magnetic Nanoparticles

The thermal and mechanical properties of a polyurethane/multi-walled carbon nanotube composite

Electrical and piezoresistive properties of multi-walled carbon nanotube/polymer composite films aligned by an electric field

Polymer‐Mediated Alignment of Carbon Nanotubes under High Magnetic Fields

The microstructure of an epoxy system oriented in high magnetic fields (15-25 T) has been observed to consist of highly oriented domains at the molecular level along the direction of the applied field. The changes in the microstructure have been characterized as a function of the magnetic-field strength and have been investigated microscopically and with wide-angle X-ray diffraction. The mechanical properties of the epoxy have been examined in light of nanoindentation experiments at different load levels. The basic results of the experimental investigations for the effect of high magnetic fields on the structure and property of the epoxy are presented. Nanoinden- tation testing has revealed large differences in the nanomechanical behavior for ther- momagnetically processed epoxy specimens. The differences can be ascribed to the microstructural changes (reorientation) of the polymer at the molecular level. © 2004

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S. S. Sablin

Papers

Polymer‐Mediated Alignment of Carbon Nanotubes under High Magnetic Fields

Mechanical properties of magnetically oriented epoxy