[3PS-267]
Improving the thermal and mechanical performance of epoxy composites using aromatic-functionalized alumina
발표자장예찬 (한국기초과학지원연구원)
연구책임자이기라 (포항공과대학)
Abstract
This study investigated maximizing alumina filler loading in epoxy by comparing aromatic and aliphatic surface modifications. The aromatic treatment outperformed the aliphatic alternative, achieving a 52.6% reduction in viscosity compared to just 3.2% for aliphatic, proving that aromatic–aromatic interactions significantly enhance filler-matrix compatibility. These findings were supported by spectroscopic analysis and resulted in composites with 20.6% higher thermal conductivity, increased mechanical stiffness, and a lower coefficient of thermal expansion. Practical thermal testing on an LED-mounted PCB confirmed that the aromatic modified system reached a 3.05°C higher steady-state temperature than unmodified fillers, making it an ideal candidate for high-performance, thermally conductive adhesives.