Developing thermal management materials with high thermal conductivity (TC) is critical to the microelectronics. Herein, we fabricated high thermal conductive polyvinylidene fluoride (PVDF) composites by using graphene foam (GF) and dopamine modified graphene nanoplatelets (mGNPs) as fillers. The results indicated that mGNPs could weld onto the GF skeleton to repair the structural defects of GF, which is conducive to improving the composite's TC by forming efficient thermal conductive pathways in the matrix. The obtained GF/mGNPs/PVDF composite (GF: 0.27 vol%, mGNPs: 8.82 vol%) exhibited an in-plane TC of 6.32 W m⁻¹ K⁻¹, which was much higher than that of GF/GNPs/PVDF composite (4.26 W m⁻¹ K⁻¹) at the same GF and GNPs contents. The GF/mGNPs/PVDF composites also possessed excellent dimensional stability and mechanical property. The study revealed that welding mGNPs onto GF is an effective method to fabricate high thermal conductive composites.

开发具有高导热率（TC）的热管理材料对于微电子学至关重要。在这里，我们通过使用石墨烯泡沫（GF）和多巴胺改性的石墨烯纳米片（mGNPs）作为填充剂来制造高导热聚偏二氟乙烯（PVDF）复合材料。结果表明，mGNPs可以焊接在GF骨架上，以修复GF的结构缺陷，这有助于通过在基体中形成有效的导热途径来提高复合材料的TC。得到的GF / mGNPs / PVDF复合材料（GF：0.27vol％，mGNPs：8.82vol％）的面内TC为6.32W m ^-1  K ^-1，比GF / GNPs / PVDF复合材料的面内TC高得多。 （4.26瓦m ^-1  K ^-1）的GF和GNP含量相同。GF / mGNPs / PVDF复合材料还具有出色的尺寸稳定性和机械性能。研究表明，将mGNPs焊接在GF上是制造高导热复合材料的有效方法。