Behaviors of Thermal Conductivities in Multicomponent Polymer Composite Sheets Including Core-Shell Particles with Nanoporous Shell Layer

Title
Behaviors of Thermal Conductivities in Multicomponent Polymer Composite Sheets Including Core-Shell Particles with Nanoporous Shell Layer
Authors
김상우
Keywords
Thermal conductivity; Polymer Composites; Core-shell powders; Nanostructure; Metal; Alumina; Thermal interface materials; Heat spreading
Issue Date
2012-09
Publisher
대한화학회 추계 학술대회
Abstract
In the high-power light-emitting diodes display and multi-functional electronic devices, there are critical issues such as heat dissipation and electromagnetic interference which cause a program to malfunction or to health hazards.1~4 To solve these issues, multi-component composites with high thermal performance have recently been studied by many researchers. In this study, thermal conductivities of multi-component polymer composites of core-shell particles with a nanoporous nanostructured shell layer were investigated. Soft-magnetic FeCr core and alumina shell particles were fabricated by a supercritical fluid technology combined with sol-gel processing and subsequent heat treatment. As-prepared core-shell particles and additional alumina powders were blended with a polyolefin binder solution, and then were tape-casted onto the Mylar film. Heat-spreadable composite sheets consisting of the core-shell particles with a mesoporous -Al2O3 shell were fabricated and their thermal conductivities were measured. The multi-component nanocomposites showed much higher thermal conductivity compared to that of the simple mixture composites of the FeCr-alumina. Thermal conductivities of three-component composite sheets including core-shell particles with nanostructured shell layer was discussed from the results of a modified thermal conductivity theory and microstructural analysis.
URI
http://pubs.kist.re.kr/handle/201004/43458
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KIST Publication > Conference Paper
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