Method of producing exfoliated graphite, flexible graphite, and nano-scaled graphene platelets
- Centerville, OH
- Columbus, OH
The present invention provides a method of exfoliating a layered material (e.g., graphite and graphite oxide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm. The method comprises (a) dispersing particles of graphite, graphite oxide, or a non-graphite laminar compound in a liquid medium containing therein a surfactant or dispersing agent to obtain a stable suspension or slurry; and (b) exposing the suspension or slurry to ultrasonic waves at an energy level for a sufficient length of time to produce separated nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.
- Research Organization:
- Nanotek Instruments, Inc. (Dayton, OH)
- Sponsoring Organization:
- USDOE
- Assignee:
- Nanotek Instruments, Inc. (Dayton, OH)
- Patent Number(s):
- 7,824,651
- Application Number:
- 11/800,728
- OSTI ID:
- 1017459
- Country of Publication:
- United States
- Language:
- English
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