Abstract This study suggests the simple and effective synthesis method of chemically interconnected hexagonal boron nitride (h-BN)–carbon nanotubes (CNTs) hybrid materials (BN–Fe-CNT) with aminosilane functionalized iron oxide nanoparticles (NH2–Fe) via amide bond formations. Synthesized BN-Fe-CNT was acting as an effective filler that enhanced the mechanical, thermal, and electrical properties of polyimide (PI) nanocomposites and accelerated polycondensation reaction of poly(amic acid) (PAA) due to its high thermal conductivity and heat diffusivity. At a 2 wt% filler reinforcement, the in-plane thermal conductivity of the BN-Fe-CNT/PI reached 15 W m−1 K−1 at 200 °C, which represents an enhancement of approximately 11430% compared to that of pure PI. Moreover, thermal stability was enhanced from 400 °C to 570 °C. Furthermore, the connected CNTs between the individual h-BN produced electron pathways through the PI matrix, with the BN-Fe-CNT/PI exhibiting 106 times higher electrical conductivity than that of pure PI. The results in this study clearly suggested that the BN-Fe-CNT could be applicable as an effective multi-functional reinforcement in the fabrication of lightweight polymer nanocomposites with superior mechanical properties, high thermal properties, and high electrical conductivities.

中文翻译：

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六方氮化硼-碳纳米管混合网络结构增强聚酰亚胺纳米复合材料的热、机械和电性能

摘要 本研究提出了一种通过酰胺键与氨基硅烷官能化氧化铁纳米粒子 (NH2-Fe) 化学互连的六方氮化硼 (h-BN)-碳纳米管 (CNTs) 杂化材料 (BN-Fe-CNT) 的简单有效合成方法。编队。合成的 BN-Fe-CNT 作为一种有效的填料，由于其高导热性和热扩散性，可增强聚酰亚胺 (PI) 纳米复合材料的机械、热学和电学性能并加速聚酰胺酸 (PAA) 的缩聚反应. 在 2 wt% 的填料增强下，BN-Fe-CNT/PI 的面内热导率在 200 °C 时达到 15 W m-1 K-1，与纯的相比提高了约 11430%。 PI。此外，热稳定性从 400 °C 提高到 570 °C。此外，单个 h-BN 之间连接的 CNT 产生了通过 PI 基质的电子路径，BN-Fe-CNT/PI 的电导率是纯 PI 的 106 倍。这项研究的结果清楚地表明，BN-Fe-CNT 可用作有效的多功能增强材料，用于制造具有优异机械性能、高热性能和高导电性的轻质聚合物纳米复合材料。