In this work, boron nitride (BN) and exfoliated boron nitride nanosheets (BNNs) were employed as thermal conductive fillers to improve the thermal conductivity of poly(vinylidene fluoride) (PVDF) composites. Results suggested that the thermal conductivity of PVDF increases significantly with an increase in loading content of functional fillers. When the mass ratio of fillers was more than 30 wt%, the heat conduction network was formed. BNNs were capable of forming denser heat conduction network as per the SEM observations. In this scenario, PVDF/BNNs composites demonstrated excellent thermal conductivity. For example, the thermal conductivity of PVDF/BNNs (60/40) was 0.82 W/mK, which was 2.4 times and 17% higher than that of neat PVDF and PVDF/BN (60/40) counterpart, respectively. The non-isothermal crystallization of corresponding composite was studied by Mo method. Combining with XRD results, both BN and BNNs acted as the nucleation agents but had no effect on crystal forms.

在这项工作中，氮化硼（BN）和片状氮化硼纳米片（BNNs）被用作导热填料，以提高聚偏二氟乙烯（PVDF）复合材料的导热性。结果表明，PVDF的热导率随功能性填料含量的增加而显着增加。当填料的质量比大于30wt％时，形成导热网络。根据SEM观察，BNN能够形成更密集的热传导网络。在这种情况下，PVDF / BNNs复合材料表现出出色的导热性。例如，PVDF / BNN（60/40）的热导率为0.82 W / mK，分别比纯PVDF和PVDF / BN（60/40）的热导率高2.4倍和17％。采用Mo法研究了相应复合材料的非等温结晶。结合X射线衍射结果，BN和BNN均充当成核剂，但对晶型没有影响。