Silicon carbide nanowires (SiCnws) were in-situ grown on boron nitride nanosheets (BNNS) to construct a novel kind of nest-like hetero-structured BNNS@SiCnws thermally conductive fillers from natural bamboo leaves and tetraethyl orthosilicate (TEOS) by means of ultrasonic impregnation, sol-gel followed by carbothermic reduction. Then, the thermally conductive & electrically insulating BNNS@SiCnws/epoxy composites were prepared via blending-casting method. When the amount of BNNS@SiCnws-II (65/35, wt/wt) was 20 wt%, BNNS@SiCnws/epoxy composites presented the optimal overall performances. Thermal conductivity coefficient (λ) of BNNS@SiCnws-II (20 wt%)/epoxy composites increased from 0.22 W/mK of pure epoxy matrix to 1.17 W/mK, higher than that of SiCnws/epoxy (0.72 W/mK), BNNS/epoxy (0.82 W/mK) and (BNNS/SiCnws)/epoxy composites (direct mixing BNNS/SiCnws, 65/35, wt/wt 0.76 W/mK) with the same filler concentration of 20 wt%. Meanwhile, BNNS@SiCnws/epoxy composites presented excellent heat transfer/heat dissipation efficiency, due to synergistic effect of the “line-to-surface” hetero-structure of SiCnws and BNNS, which could significantly improve the formation probability of the thermally conductive paths. Furthermore, the BNNS@SiCnws/epoxy composites possessed favorable electrical insulation, thermostability and ideal mechanical properties. Furthermore, the related surface & volume resistivities, the electric breakdown strength, the glass-transition temperature, the heat resistant index, the flexural strength as well as the impact strength of BNNS@SiCnws-II (20 wt%)/epoxy composites reached to be 3.7 × 10¹⁵ Ω, 5.17 × 10¹⁵ Ω cm, 22.1 kV/mm, 126.7 °C, 185.5 °C, 75.7 MPa and 8.2 kJ/m², respectively.

将碳化硅纳米线（SiCnws）原位生长在氮化硼纳米片（BNNS）上，通过超声波从天然竹叶和原硅酸四乙酯（TEOS）中构建一种新型的巢状异质结构BNNS @ SiCnws导热填料浸渍，溶胶-凝胶，然后进行碳热还原。然后，将导热＆电绝缘BNNS @ SiCnws /制备环氧复合材料通过混合流延法。当BNNS @ SiCnws-II（65/35，wt / wt）的含量为20 wt％时，BNNS @ SiCnws /环氧树脂复合材料表现出最佳的整体性能。导热系数（λBNNS @ SiCnws-II（20 wt％）/环氧树脂复合材料）从纯环氧基质的0.22 W / mK增加到1.17 W / mK，高于SiCnws /环氧树脂（0.72 W / mK），BNNS /环氧树脂（0.82 W / mK）和（BNNS / SiCnws）/环氧复合材料（直接混合BNNS / SiCnws，65/35，wt / wt 0.76 W / mK），填料浓度相同，为20 wt％。同时，由于SiCnws和BNNS的“线对面”异质结构的协同作用，BNNS @ SiCnws /环氧树脂复合材料具有出色的传热/散热效率，可显着提高导热路径的形成概率。此外，BNNS @ SiCnws /环氧树脂复合材料具有良好的电绝缘性，热稳定性和理想的机械性能。此外，相关的表面和体积电阻率，击穿强度，玻璃化温度，¹⁵  Ω，5.17×10 ¹⁵  Ω厘米，22.1千伏/毫米，126.7℃，185.5℃，75.7兆帕和8.2千焦耳/米²，分别。