A method for preparing and applying flexible graphene aerogel

By using carboxymethyl cellulose and chitosan crosslinking agents in the preparation of flexible graphene aerogels, the problems of toxic substance residues and poor interfacial compatibility were solved, achieving high biocompatibility and improved mechanical properties, reducing electrical resistance and extending service life.

CN121085257BActive Publication Date: 2026-05-26GUANGDONG XINCHANGSHUN NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202511253062.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-03
Publication Date
2026-05-26
Estimated Expiration
2045-09-03

AI Technical Summary

Technical Problem

Existing flexible graphene aerogels introduce chemical crosslinking agents during the preparation process, resulting in residual toxic substances, affecting biocompatibility, and are prone to performance degradation with long-term use. Furthermore, the composite polymer materials have poor interfacial compatibility.

Method used

Carboxymethyl cellulose was used as a stabilizer to form an ice crystal-graphene composite through an alternating magnetic field and pre-freezing. Chitosan crosslinking agent was used instead of chemical crosslinking agent to prepare flexible graphene aerogels through hydrogen bonding.

Benefits of technology

It avoids the residue of toxic substances, improves biocompatibility and enhances the mechanical properties of flexible graphene aerogel, reduces contact resistance, increases conductivity, and extends service life.

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Abstract

This invention relates to the field of flexible graphene aerogel technology, specifically to a method for preparing and applying flexible graphene aerogel, comprising: dispersing graphene nanosheets in deionized water to form a dispersion with a concentration of 5-10 mg / mL, and adding 0.1-0.5 wt% carboxymethyl cellulose as a stabilizer; placing the dispersion in an alternating magnetic field for pre-freezing to form an ice crystal-graphene composite; introducing 1-5 wt% chitosan crosslinking agent into the pre-frozen ice crystal-graphene composite, which binds to the oxygen-containing functional groups on the graphene surface through hydrogen bonds to obtain the composite; and drying the composite to obtain a flexible graphene aerogel. This invention can avoid the residue of toxic substances during the preparation of flexible graphene aerogel, prevent the impact of residual toxic substances on biocompatibility, and avoid performance degradation of flexible graphene aerogel after long-term use.
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