Method for preparing water-phase graphene dispersion liquid by employing ultrasonic stripping

A graphene dispersion and ultrasonic stripping technology, which is applied in the field of ultrasonic stripping to prepare high-concentration aqueous graphene dispersion and aqueous graphene dispersion, can solve technical difficulties, easy agglomeration, large specific surface area of ​​graphene, etc. , to achieve the effect of improving hydrophobicity, less structural defects, and good dispersion
CN104876210AInactive Publication Date: 2015-09-02SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2015-09-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a water-phase graphene dispersion liquid by employing ultrasonic stripping. The method comprises the following steps: adding 1 part of graphite to 500-10,000 parts of a lignin amphiphilic polymer solution with the mass concentration of 0.1-10g / L; carrying out ultrasonic stripping at 20-60 DEG C for 10-100 hours by virtue of an ultrasonic cleaning machine; and then centrifugally separating to obtain the graphene dispersion liquid. According to the method disclosed by the invention, a lignin amphiphilic polymer is adopted as a natural polymer dispersant of water-phase graphene for the first time; the graphene in the prepared dispersion liquid is few in structure defect and few in layers; the lowest concentration is 0.1g / L; the excellent performance of the graphene is well reserved; the method can be widely applied to the fields such as catalysts, sensors and conducting materials; the method disclosed by the invention is economical and environment-friendly; the utilization rate of raw materials is improved; and the industrialization cost is reduced.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of graphene functional materials, in particular to a water-phase graphene dispersion, in particular to a method for preparing a high-concentration water-phase graphene dispersion by ultrasonic stripping. Background technique

[0002] Graphene is a two-dimensional carbon nanomaterial composed of a layer of carbon atoms. It is the thinnest known two-dimensional material, with a thickness of only 0.34nm. Graphene has unique properties in terms of mechanics, electricity, and heat, and has set off the third research boom on carbon materials after fullerenes and carbon nanotubes worldwide.

[0003] At present, the preparation methods of graphene include mechanical exfoliation method, chemical vapor deposition method, epitaxial growth method, redox method, ultrasonic exfoliation method and so on. Among them, the quality of graphene prepared by mechanical exfoliation method is the highest, but its yi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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