Abstract Novel hetero-structured silicon carbide-boron nitride nanosheets (SiC-BNNS) by sol-gel and in-situ growth method were performed as thermally conductive & insulating fillers, and the SiC-BNNS/epoxy thermally conductive nanocomposites were then prepared by blending-casting approach. Synthesized hetero-structured SiC-BNNS fillers have synergistic improvement effects on the thermal conductivities of the SiC-BNNS/epoxy nanocomposites. When the amount of hetero-structured SiC-BNNS fillers is 20 wt% (SiC-BNNS, 1/1, w/w), the thermal conductivity coefficient (λ) value of the SiC-BNNS/epoxy nanocomposites (0.89 W/mK) is 4.1 times that of pure epoxy resin (0.22 W/mK), and 2.1, 1.4, and 1.7 times of SiC/epoxy (0.43 W/mK), BNNS/epoxy (0.62 W/mK), and (SiC/BNNS)/epoxy thermally conductive nanocomposites (0.52 W/mK) with the same amount of fillers (20 wt% single BNNS, SiC, or SiC/BNNS hybrid fillers), respectively. Meantime, the obtained (SiC-BNNS)/epoxy thermally conductive nanocomposites also demonstrate favorable electrical insulating properties, and the breakdown strength, volume resistivity as well as surface resistivity is 22.1 kV/mm, 2.32 × 1015 Ω cm, and 1.26 × 1015 Ω cm, respectively.

中文翻译：

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通过加入原位制造的异质结构 SiC-BNNS 填料提高环氧树脂纳米复合材料的导热性

摘要 采用溶胶-凝胶法和原位生长法制备新型异质结构碳化硅-氮化硼纳米片（SiC-BNNS）作为导热绝缘填料，然后共混制备SiC-BNNS/环氧树脂导热纳米复合材料。 -铸造方法。合成的异质结构 SiC-BNNS 填料对 SiC-BNNS/环氧树脂纳米复合材料的热导率具有协同改善作用。当异质结构 SiC-BNNS 填料的量为 20 wt% (SiC-BNNS, 1/1, w/w) 时，SiC-BNNS/环氧树脂纳米复合材料的导热系数 (λ) 值 (0.89 W/mK ) 是纯环氧树脂 (0.22 W/mK) 的 4.1 倍，是 SiC/环氧树脂 (0.43 W/mK)、BNNS/环氧树脂 (0.62 W/mK) 和 (SiC/BNNS) 的 2.1、1.4 和 1.7 倍)/环氧导热纳米复合材料 (0. 52 W/mK）与相同数量的填料（20 wt% 单一 BNNS、SiC 或 SiC/BNNS 混合填料）。同时，所得(SiC-BNNS)/环氧导热纳米复合材料也表现出良好的电绝缘性能，击穿强度、体积电阻率和表面电阻率分别为22.1 kV/mm、2.32 × 1015 Ω cm和1.26 × 1015 Ω厘米，分别。