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Method for producing ultra-thin nano-scaled graphene platelets

United States Patent Application

20090022649
A1
View the Complete Application at the US Patent & Trademark Office
A method of producing ultra-thin, separated nano-scaled platelets having an average thickness no greater than 2 nm or comprising, on average, no more than 5 layers per platelet from a layered graphite material. The method comprises: (a) providing a supply of nano-scaled platelets with an average thickness of no more than 10 nm or having, on average, no more than 30 layers per platelet; and (b) intercalating the supply of nano-scaled platelets to produce intercalated nano platelets and exfoliating the intercalated nano platelets at a temperature and a pressure for a sufficient period of time to produce the ultra-thin 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.
Zhamu, Aruna (Centerville, OH), Shi, Jinjun (Columbus, OH), Jang, Joan (Centerville, OH), Jang, Bor Z. (Centerville, OH)
11/ 879,680
July 19, 2007
[0001] This invention is based on the research result of a US Department of Energy (DoE) Small Business Innovation Research (SBIR) project. The US government has certain rights on this invention.