Epoxy resin is widely used in various industrial fields due to its good adhesion, corrosion resistance and the like, but its thermal conductivity is low and it is difficult to meet the heat dissipation requirements. In order to obtain epoxy composites with high thermal conductivity and excellent electrical insulation, an effective method for functionalizing boron nitride (BN) and multi-walled carbon nanotubes (CNTs) is proposed. The BN and CNTs were first ultrasonically mixed, and then functionalized by a simple dip coating procedure with polydopamine (PDA) coating (named as m(BN/CNT)). Fourier transform infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy analysis demonstrated the successful functionalization of PDA on BN and CNTs surfaces. Adding 20 vol% m(BN₁₀/CNT₁) increased the thermal conductivity of the epoxy composite by 231% compared to pure epoxy matrix, while still maintained a volume resistivity above 10¹⁴ Ω·cm. Dynamic mechanical analysis and scanning electron microscopy showed that PDA functionalization improved the interfacial interaction between BN, CNTs and the matrix, thus ensuring the improved thermal and mechanical properties.

环氧树脂由于其良好的粘附性，耐腐蚀性等而广泛用于各种工业领域，但是其导热率低并且难以满足散热要求。为了获得具有高导热性和优异电绝缘性的环氧复合材料，提出了一种有效的功能化氮化硼（BN）和多壁碳纳米管（CNT）的方法。首先将BN和CNT进行超声混合，然后通过带有聚多巴胺（PDA）涂层（称为m（BN / CNT））的简单浸涂程序将其功能化。傅里叶变换红外光谱，热重分析和X射线光电子能谱分析证明了PDA在BN和CNT表面上的成功功能化。添加20 vol％m（BN ₁₀ / CNT₁）相比，纯环氧基体由231％提高环氧复合材料的热传导性，同时仍保持高于10的体积电阻率¹⁴  Ω·cm以下。动态力学分析和扫描电子显微镜显示，PDA功能化改善了BN，CNT和基体之间的界面相互作用，从而确保了改善的热和机械性能。