Aligning of carbon nanotubes with an external electric field to improve thermal conductivity of polydimethylsiloxane nanocomposites interface material
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Date
2018-06
Authors
Mimi Syahira Masraff
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Abstract
Advancements in the semiconductor industry have lead to the miniaturization of
components and increased power densities, resulting in thermal management issues. In
response to this shift, finding multifunctional materials with excellent thermal
conductivity and tailored electrical properties are becoming increasingly important. For
this research thesis, the effect of an external electric field on aligning of carbon
nanotubes was studied to develop and characterize thermally conductive polymer
composites. A CNT/PDMS composite was prepared and an external electric field at
various degrees was introduced during the curing to promote the carbon nanotubes
alignment. The possibility of improving the thermal conductivity by introducing and
aligning polymer fibers in the composites was investigated. The composites were
characterized with respect to their physical, thermal, and electrical properties to propose
possibilities of application in the electronic packaging industries. Experimental results
reveal that the resulting nanocomposites exhibit anisotropic properties with significantly
improved electrical and thermal conductivities in the alignment direction.