Super-flexible high thermal conductive grapheme film and preparation method thereof
US11679983B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 20, 2016 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Dec 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A super-flexible high thermal conductive graphene film and a preparation method thereof are provided. The graphene film is obtained from ultra large homogeneous graphene sheets through processes of solution film-forming, chemical reduction, high temperature reduction, high pressure suppression and so on. The graphene film has a density in a range of 1.93 to 2.11 g/cm3, is formed by overlapping planar oriented graphene sheets with an average size of more than 100 μm with each other through π-π conjugate action, and comprises 1 to 4 layers of graphene sheets which have few defects. The graphene film can be repeatedly bent for 1200 times or more, with elongation at break of 12-18%, electric conductivity of 8000-10600 S/cm, thermal conductivity of 1800-2600 W/mK, and can be used as a highly flexible thermal conductive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.