The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2020
Filed:
Jun. 16, 2015
Applicant:
Directa Plus S.p.a., Lomazzo, IT;
Inventors:
Assignee:
Directa Plus S.p.A., Lomazzo, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B82Y 30/00 (2011.01); B01J 19/10 (2006.01); C01B 32/19 (2017.01); C01B 32/225 (2017.01); C01B 32/184 (2017.01); B82Y 40/00 (2011.01); C01B 32/182 (2017.01);
U.S. Cl.
CPC ...
B82Y 30/00 (2013.01); B01J 19/10 (2013.01); B82Y 40/00 (2013.01); C01B 32/182 (2017.08); C01B 32/184 (2017.08); C01B 32/19 (2017.08); C01B 32/225 (2017.08); C01B 2204/04 (2013.01); C01B 2204/32 (2013.01);
Abstract
Process for producing pristine graphene nanoplatelets, comprising the expansion of flakes of intercalated graphite and the collection thereof in water with formation of a dispersion in the substantial absence of surfactants, followed by an exfoliation and size reduction treatment carried out using ultrasonication of the aqueous dispersion or using high pressure homogenization thereof in a high shear homogenizer. A dispersion of pristine graphene is obtained in the form of nanoplatelets, at least 90% of which have a lateral size (x, y) from 50 to 50,000 nm and a thickness (z) from 0.34 to 50 nm, having a C/O ratio ≥100:1 and a high electrical conductivity.