Effects of silica particles on the electrical percolation threshold and thermomechanical properties of epoxy/silver nanocomposites
- Effects of silica particles on the electrical percolation threshold and thermomechanical properties of epoxy/silver nanocomposites
- 남승웅; 조현우; 김태호; 김대흠; 성봉준; 임순호; 김희숙
- Issue Date
- Applied physics letters
- VOL 99, NO 4, 043104-1-043104-3
- We experimentally and theoretically demonstrated that the addition of silica particles could
improve both the electrical conductivity and the thermomechanical properties of epoxy/silver
nanocomposites. As silica particles were added, the electrical percolation threshold concentration
of silver nanoparticles decreased and the electrical resistivity of the composite decreased by about
8 orders of magnitude. The coefficient of thermal expansion also decreased with increasing volume
fraction of silica particles. Molecular simulations showed that the additional silica particles made
the effective intermolecular interactions between silver nanoparticles attractive, thereby enhancing
the formation of an electrical percolation network.
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