<b>Material Design of Thermally Conductive Polyimides via Hybridization with Metallic or Inorganic </b><b>Particles </b>

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  • 金属／無機微粒子とのハイブリッド化による ポリイミド樹脂の高熱伝導化設計
  • キンゾク/ムキ ビリュウシ ト ノ ハイブリッドカ ニ ヨル ポリイミド ジュシ ノ コウネツ デンドウカ セッケイ

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Abstract

Enhancement of thermal conductivity along the out-of-plane direction in polyimide（PI）blend films containing silver nanoparticles（Ag-NP）, µm-sized pyramidal or needle-shaped ZnO, and cubed MgO particles has been extensively investigated. Microphase-separated structures with "vertical double percolation（VDP）" morphology were spontaneously formed in the PI blend films composed of sulfur- and fluorine-containing PIs, in which two phases were separately aligned along the out-of-plane direction, and ZnO and MgO particles were preferentially precipitated in the fluorine-containing PI phase. In particular, the PI blend films containing needle-shaped ZnO particles exhibited significant enhancement of thermal diffusivity along the out-of-plane direction even at lower filler contents, which indicate that the VDP structure with selective incorporation of anisotropic shaped inorganic particles functions as highly efficient thermal conductive pathway.

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