Functionalized graphene supraparticles, process for production thereof and use thereof

EP4758097A1Pending Publication Date: 2026-06-17EVONIK OPERATIONS GMBH
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
EVONIK OPERATIONS GMBH
Filing Date
2024-07-09
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Conventional graphene powders exhibit poor handling properties due to low bulk density and high dust formation, leading to challenges in incorporation into elastomeric systems and other composite materials, and limiting their use in electrically insulating composite materials.

Method used

A process for producing functionalized graphene supraparticles by mixing graphene material with a solvent and adding functionalization additives and dispersing aids, followed by spray drying to achieve improved flowability and reduced dust formation.

Benefits of technology

The resulting functionalized graphene supraparticles demonstrate enhanced flowability, increased bulk density, and reduced dust evolution, enabling easier handling and incorporation into various matrix systems while maintaining thermal conductivity and achieving electrical insulation.

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Abstract

The present invention relates to a process for producing functionalized graphene supraparticles by dispersing the particles in a solvent, adding an additive to the dispersion, and at least partly removing the solvent from the dispersion thus obtained to give functionalized graphene supraparticles.
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