Multi-walled carbon nanotubes coated by multi-layer silica for improving thermal conductivity of polymer composites

Thermal Boundary Resistance Effects in Carbon Nanotube Composites

“…Also, we will calculate the local TBR, between the edge of a DWNT and SiO 2 , and compare with average TBR between the whole DWNT and SiO 2 . Encapsulating the CNT in a material such as SiO 2 has been experimentally found to improve heat transfer by reducing the effective TBR between the CNT and the polymer [21].…”

“…To model the effects of the CNT length and dispersion pattern at the mesoscale, methods such as Monte Carlo (MC) simulations have been applied by our laboratory [16][17][18], or methods that are based on conventional simulations such as simulations with finite elements [19,20]. Possible strategies to diminish the effects of TBR could be (1) to increase the volume fraction of the inclusions, in order to break through the percolation limit for thermal transfer, (2) to affect the interface by either functionalizing the CNTs, or by coating them in a different material and creating a gradient of stiffness between the CNT and the matrix material so that the effective TBR becomes smaller [21].…”

Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers

“…Taking account of the low thermal conductivity of PC matrix, one approach to improving the thermal conductivity is adding thermal conductive materials. Many kinds of thermal conductive fillers have been introduced into the composites, such as metals, metal oxides, carbon materials, metal nitrides and carbides [4][5][6][7][8]. Recently, great attention has been paid to the use of carbon materials for increasing thermal conductivity of polymer due to their unique nanostructures, high aspect ratio and superior thermal conductivity [9][10][11].…”

Preparation of alumina-coated graphite for thermally conductive and electrically insulating epoxy composites

“…Of course, sufficient amount of Al(NO 3 ) 3 $9H 2 O is essential for uniform coverage of alumina on graphite surface, whereas ultrahigh concentration of alumina precursor in solution would lead to the formation of homogeneously nucleated free Al(OH) 3 particles in the reaction medium, resulting in a decrease in the amount of alumina attached on graphite surface. 3,40 In order to further conrm that the two-step coating method is the main reason for better coating effect of sample 6, sample 7 was prepared. In contrary, uniform alumina coatings are observed on the surface of sample 6.…”