Title:
GRAPHITE NANOPLATELETS AND COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO/2009/106507
Kind Code:
A3
Abstract:
Disclosed are graphite nanoplatelets produced by a process which comprises thermal plasma expansion of intercalated graphite to produce expanded graphite followed by exfoliation of the expanded graphite, where the exfoliation step is selected from ultrasonication, wet milling and controlled caviation and where greater than 95% of the graphite nanoplatelets have a thickness of from about 0.34 nm to about 50 nm and a length and width of from about 500 nm to about 50 microns. The intercalated graphite is intercalated for example with a mixture of sulfuric and nitric acids. The plasma reactor for example employs an RF induction plasma torch. All three exfoliation methods are performed in an organic solvent or water. The exfoliation steps may be performed with the aid of for example a nonionic surfactant. Also disclosed are plastic, ink, coating, lubricant or grease compositions comprising the graphite nanoplatelets.
Inventors:
MAMAK MARC (US)
STADLER URS LEO (US)
CHOI SUNGYEUN (US)
CORDOLA ENZO (US)
STADLER URS LEO (US)
CHOI SUNGYEUN (US)
CORDOLA ENZO (US)
Application Number:
PCT/EP2009/052127
Publication Date:
July 29, 2010
Filing Date:
February 23, 2009
Export Citation:
Assignee:
BASF SE (DE)
MAMAK MARC (US)
STADLER URS LEO (US)
CHOI SUNGYEUN (US)
CORDOLA ENZO (US)
MAMAK MARC (US)
STADLER URS LEO (US)
CHOI SUNGYEUN (US)
CORDOLA ENZO (US)
International Classes:
C01B31/04; C09C1/46
Domestic Patent References:
| WO2007103497A2 | 2007-09-13 |
Foreign References:
| US20070092432A1 | 2007-04-26 | |||
| US20080048152A1 | 2008-02-28 |
Other References:
KALAITZIDOU ET AL: "Mechanical properties and morphological characterization of exfoliated graphite-polypropylene nanocomposites", COMPOSITES PART A: APPLIED SCIENCE AND MANUFACTURING, ELSEVIER SCIENCE PUBLISHERS B.V., AMSTERDAM, NL LNKD- DOI:10.1016/J.COMPOSITESA.2007.02.003, vol. 38, no. 7, 19 June 2007 (2007-06-19), pages 1675 - 1682, XP022122081, ISSN: 1359-835X
FUKUSHIMA H ET AL: "Thermal conductivity of exfoliated graphite nanocomposites", JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, KLUWER ACADEMIC PUBLISHERS, DO LNKD- DOI:10.1007/S10973-005-7344-X, vol. 85, no. 1, 3 July 2006 (2006-07-03), pages 235 - 238, XP019402546, ISSN: 1572-8943
H. FUKUSHIMA ET AL.: "Graphite platelet/Nylon nanocomposites", 2004, XP002581740, Retrieved from the Internet
OSVATH ET AL: "Graphene layers from thermal oxidation of exfoliated graphite plates", CARBON, ELSEVIER, OXFORD, GB, vol. 45, no. 15, 29 November 2007 (2007-11-29), pages 3022 - 3026, XP022370148, ISSN: 0008-6223
FUKUSHIMA H ET AL: "Thermal conductivity of exfoliated graphite nanocomposites", JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, KLUWER ACADEMIC PUBLISHERS, DO LNKD- DOI:10.1007/S10973-005-7344-X, vol. 85, no. 1, 3 July 2006 (2006-07-03), pages 235 - 238, XP019402546, ISSN: 1572-8943
H. FUKUSHIMA ET AL.: "Graphite platelet/Nylon nanocomposites", 2004, XP002581740, Retrieved from the Internet
OSVATH ET AL: "Graphene layers from thermal oxidation of exfoliated graphite plates", CARBON, ELSEVIER, OXFORD, GB, vol. 45, no. 15, 29 November 2007 (2007-11-29), pages 3022 - 3026, XP022370148, ISSN: 0008-6223
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