Graphene-reinforced polymer matrix composites
US10329391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2015 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jul 29, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2381/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A graphene-reinforced polymer matrix composite comprising an essentially uniform distribution in a thermoplastic polymer of about 10% to about 50% of total composite weight of particles selected from graphite microp articles, single-layer graphene nanoparticles, multilayer graphene nanoparticles, and combinations thereof, where at least 50 wt % of the particles consist of single- and/or multi-layer graphene nanoparticles less than 50 nanometers thick along a c-axis direction. The graphene-reinforced polymer matrix is prepared by a method comprising (a) distributing graphite microparticles into a molten thermoplastic polymer phase comprising one or more matrix polymers; and (b) applying a succession of shear strain events to the molten polymer phase so that the matrix polymers exfoliate the graphite successively with each event until at least 50% of the graphite is exfoliated to form a distribution in the molten polymer phase of single- and multi-layer graphene nanoparticles less than 50 nanometers thick along a c-axis direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.