Abstract Spherically aggregated boron nitride (BN) is advantageous for improving thermal conductivity. However, it is difficult to process due to its fragility and poor wettability. Herein we report coating boron nitride aggregates with polysilazane (PSZ) and three different silanes, glycidoxypropyltrimethoxysilane (GPTMS), aminopropyltriethoxysilane (APTES), and mercaptopropyltrimethoxysilane (MPTMS), via hydrolysis and condensation. The PSZ coating protected BN from external force, and the silane coatings enhanced interfacial adhesion between the filler and the matrix. An epoxy composite contained the BN surface modified with PSZ and APTES had the highest thermal conductivity of 11.8 W m−1 K−1 at a filler fraction of 75 wt%. Its thermal conductivity was 62 times higher than that of the neat epoxy.

中文翻译：

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用硅烷偶联剂进行表面处理后，聚硅氮烷涂覆的 A-BN/环氧树脂复合材料的导热性增强

摘要 球形聚集的氮化硼（BN）有利于提高热导率。但由于其脆性和润湿性差，难以加工。在此，我们报告了通过水解和缩合用聚硅氮烷 (PSZ) 和三种不同的硅烷、环氧丙氧基丙基三甲氧基硅烷 (GPTMS)、氨基丙基三乙氧基硅烷 (APTES) 和巯基丙基三甲氧基硅烷 (MPTMS) 涂覆氮化硼聚集体。PSZ 涂层保护 BN 免受外力影响，硅烷涂层增强了填料和基体之间的界面附着力。含有用 PSZ 和 APTES 改性的 BN 表面的环氧树脂复合材料在填料比例为 75 wt% 时具有最高的热导率 11.8 W m-1 K-1。它的热导率是纯环氧树脂的 62 倍。