期刊
COMPOSITES PART B-ENGINEERING
卷 205, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2020.108509
关键词
Graphene foam; Composites; Graphene nanoplatelets; Thermal management; Thermal conductivity
资金
- National Key Research and Development Program of China [2016YFB0600701]
- Fundamental Research Funds for the Central Universities [FRF-BD-20-09A, FRF-TP-16-062A1]
In this study, high thermal conductive PVDF composites were fabricated using graphene foam and dopamine modified graphene nanoplatelets. The results showed that welding mGNPs onto GF improved the composite's TC by forming efficient thermal conductive pathways. The obtained composites exhibited excellent in-plane TC, dimensional stability, and mechanical property.
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.
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