Fabrication of Micro/Nano Graphite Sheets for Low Carbon Carbon-Containing Refractories by Exfoliating Thick Graphite Flakes via Three-Roll Milling [三辊研磨剥离鳞片石墨制备低碳含碳耐火材料用微/纳米石墨薄片]

作者：Huang J.^*; Liu M.; Sun Z.; Hou X.; Li X.; Chen Z.; Hu Z.; Ma J.; Feng Z.

来源：Rare Metal Materials and Engineering, 2020, 49(2): 682-687.

• Flake graphite
• Graphite nanoplatelets
• Low-carbon carbon-containing refractories
• Phenolic formaldehyde resin
• Three-roller milling

Based on the theoretical analysis of the application of three-roller milling (TRM) exfoliating technology in low-carbon carbon-containing refractories, graphite nanoplatelets (GNP) were obtained by exfoliating flake graphite (FG) in phenol formaldehyde resin (PF) via TRM. The effects of the exfoliating times on the structure and morphology of the products were investigated. Using alcohol as the solvent, the product exfoliated from FG by TRM was soaked and ultrasonically washed to remove PF, followed by drying, and then characterized by XRD, SEM, TEM and particle size analysis. It is found that the original FG with 150 μm in size and several microns in thickness is constantly exfoliated. When the exfoliating times increases gradually to 8 or even 16 times, GNPs obtained have a size of 10~30 μm and a thickness of 30~100 nm. This technical can be applied in low-carbon and ultra-low carbon refractory industries to reduce carbon content, as well as in resin based carbon fiber composites for aviation industry to improve resin strength.

• 单位
  南昌航空大学