Ultrafine graphene and preparation method thereof
Through crushing and low-temperature ball milling, step-by-step oxidation and microwave pyrolysis expansion processes, combined with ultrasonic treatment, the problems of complex ultrafine graphene preparation process and low yield in the existing technology are solved, and a rapid and reliable large-scale preparation of high-quality ultrafine graphene is achieved.
CN117383550BActive Publication Date: 2025-03-18QINGDAO LUOWEI NEW MATERIALS CO LTD +2
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Patent Information
- Application Number
- CN202311483652.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2043-11-08
AI Technical Summary
Technical Problem
The prior art is difficult to quickly, reliably and on a large scale to prepare high-quality ultrafine graphene, and the process is complex and the yield is low.
Method used
Ultrafine graphene powder is prepared by crushing and low-temperature ball milling. Through step-by-step oxidation and microwave pyrolysis expansion processes, combined with ultrasonic treatment, the preparation of ultrafine graphene is gradually realized.
Benefits of technology
The rapid, reliable and large-scale preparation of high-quality ultrafine graphene is achieved, reducing the amount of oxidant used and reaction time, simplifying the process flow, and improving yield and product purity.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to the field of graphite materials, and in particular to an ultrafine graphene and a preparation method thereof, wherein the preparation method comprises: 1) crushing graphite and low-temperature ball milling to provide ultrafine graphite powder; 2) mixing oxidant 1 with ultrafine graphite powder for pre-oxidation; adding oxidant 2 for primary oxidation; adding intercalation agent to assist oxidation intercalation; adding oxidant 2 for secondary oxidation; filtering to provide materials and filtering out waste acid; 3) subjecting the materials to microwave treatment to provide expanded graphite powder; mixing the expanded graphite powder with a solvent, ultrasonicating, filtering, and drying to obtain ultrafine graphene. The method of the present invention has a simple process, and the prepared nano-scale ultrafine graphite has a higher purity, and the amount of oxidant, intercalation agent, etc. used in the process is small, and the step-by-step oxidation and microwave expansion process make the graphite layer spacing larger, which is conducive to exfoliation of graphene, shortens the ultrasonic duration, and the number of graphene layers finally obtained is lower; the whole process produces less waste acid, which is suitable for large-scale industrial production.
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