ABSTRACT The dispersibility of hexagonal boron nitride (hBN) particles in epoxy resin with different chemical structures, such as bisphenol and naphthalene, was investigated. The viscosities of hBN slurries changed considerably depending on the diol compound chemical structures. Sedimentation testing of the hBN slurries revealed that the hBN particles in slurries containing naphthalene structures were densely packed due to improved dispersibility of hBN, while the hBN particles in slurries containing bisphenol structures were aggregated. These results suggested that the π–π interaction was more dominant in the dispersion of hBN particles than the hydrophobic interaction. Furthermore, the naphthalene type epoxy resin was more effective in improving the dispersibility of hBN as compared to bisphenol A type epoxy resin. The interaction between the basal plane of hBN particles and the chemical structure in the matrix is very important for hBN dispersibility improvement. Graphical Abstract

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树脂化学结构对六方氮化硼分散性的影响

摘要 研究了六方氮化硼 (hBN) 颗粒在具有不同化学结构（如双酚和萘）的环氧树脂中的分散性。hBN 浆料的粘度根据二醇化合物的化学结构而发生很大变化。hBN 浆液的沉降测试表明，由于 hBN 的分散性提高，hBN 颗粒在含有萘结构的浆液中密集堆积，而含有双酚结构的浆液中 hBN 颗粒聚集。这些结果表明 π-π 相互作用在 hBN 颗粒的分散中比疏水相互作用更占优势。此外，与双酚A型环氧树脂相比，萘型环氧树脂在提高hBN的分散性方面更有效。hBN 颗粒的基面与基体中的化学结构之间的相互作用对于 hBN 分散性的改善非常重要。图形概要