Fabrication and structural characterization of nanocomposites consisting of Ni nanoparticles dispersed in polyimide films |
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| Authors: | K Akamatsu K Nakahashi S Ikeda and H Nawafune |
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| Institution: | (1) Faculty of Science and Engineering, High Technology Research Center, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan;(2) Graduate School of Science, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan |
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| Abstract: | Formation and structure of composite layer consisting of
polyimide films containing Ni nanoparticles were investigated.
The preparation method relies on KOH treatment on polyimide film
to form carboxyl acid groups and adsorption of Ni ions by ion
exchange followed by hydrogen reduction. The amount of Ni ions
adsorbed in polyimide films were found to be systematically
controlled by changing initial KOH concentration, subsequent ion
exchange time, pH and temperature. Cross-sectional TEM
observation revealed that Ni nanoparticles with 3-5 nm in
diameter were homogeneously dispersed in the surface modified
polyimide layer after heat treatment above 250
°C in H2
atmosphere. The size and distribution of the Ni nanoparticles
were strongly dependent on the heat treatment temperature,
indicating that this method allows microstructural tuning of
metal/polymer nanocomposites. |
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| Keywords: | 61 46 +w Nanoscale materials: clusters nanoparticles nanotubes and nanocrystals 68 35 Fx Diffusion interface formation |
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