Water-based graphene dispersion made by shear stabilization
US11932831B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2022 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Oct 21, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A water-based graphene dispersion is made by shear stabilization. The method of preparing the water-based graphene dispersion using shear stabilization includes adding a composition containing a graphene powder, a super wetter surfactant and a water dispersible rheology agent into water to form an aqueous mixture; and shearing the aqueous mixture under high pressures to break down the thick layers of the graphene powder to thin layers of graphene platelet particles and to form the water-based graphene dispersion with the graphene platelet particles dispersed in the water-based graphene dispersion. The water-based graphene dispersion is stable without visible phase separation after storage at room temperature for at least one year or even more than one year.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.