A large-scale graphene preparation process
A preparation process and graphene technology, applied in the field of large-scale graphene preparation technology, can solve the problem that the method for rapidly preparing large-area, high-quality graphene has not made breakthroughs, limited graphene efficiency, output and cost, and hindered industrial development. and other problems to achieve the effect of shortening production time, increasing production capacity, and increasing contact area
Inactive Publication Date: 2020-06-02
林怡君
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
After extensive research in recent years, several methods for preparing graphene have been developed, such as mechanical exfoliation, epitaxial growth, chemical reduction of graphite oxide, chemical vapor deposition (CVD), etc. Most of these graphene preparation methods can be Graphene samples for laboratory use are obtained under specific conditions, but there has been no breakthrough in the rapid preparation of large-area, high-quality graphene, which greatly limits the efficiency, output and cost of graphene preparation, hindering its further development. Industrialization development
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0031] like Figure 1 to Figure 6 Shown, a kind of large-scale graphene preparation technique of the present invention, this technique comprises the steps:
[0032] Step 1: Graphite oxidation and intercalation treatment: Using natural flake graphite or artificial graphite as raw material, first add an oxidizing agent for oxidation reaction to prepare graphite oxide, then add an intercalation agent for intercalation reaction. Suction filtration, washing the filtered solid with water to neutrality, and drying to obtain intercalated graphite after drying;
[0033] Step 2: preparing expandable graphite: using grinding equipment to grind and sieve the dried intercalated graphite prepared in step 1 to obtain expandable graphite;
[0034] Step 3: Ultraso...
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
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| elastic modulus | aaaaa | aaaaa |
| electron mobility | aaaaa | aaaaa |
| absorbance | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the technical field of graphene preparation, and in particular, relates to a large-scale graphene preparation process, wherein the large-scale graphene preparation process comprises the following steps: with natural flake graphite or artificial graphite as a raw material, firstly, adding an oxidant, and carrying out an oxidation reaction to prepare graphite oxide; then adding an intercalation agent, carrying out an intercalation reaction, and after the intercalation reaction is finished, carrying out suction filtration on the reaction liquid, to obtain dried intercalated graphite; grinding and sieving the prepared dried intercalated graphite by a grinding device, to obtain expandable graphite; dispersing the obtained expandable graphite in an ultrasonic treatment solvent, and carrying out ultrasonic treatment to achieve primary peeling; and mixing the obtained ultrasonic primary peeled graphite with concentrated sulfuric acid and graphite by a graphene production device, to achieve final peeling, and thus obtaining graphene. The process is mainly used for large-scale preparation of large-area and high-quality graphene.
Description
technical field [0001] The invention belongs to the technical field of graphene preparation, in particular to a large-scale graphene preparation process. Background technique [0002] Graphene is an ultra-thin material with a single carbon atom thickness arranged in a two-dimensional honeycomb structure. Graphene has rich physical properties, with a specific surface area of 2600m2 / g; excellent mechanical properties, breaking strength up to 42N / m2, tensile strength and elastic modulus of 130GPa and 1.0TPa respectively, and elastic extension up to 20%; thermal conductivity Well, it is up to 5300W / (m K at room temperature; the transparency is high, and the absorbance is only 2.3%. Graphene also has excellent electrochemical properties, and its electron mobility exceeds 15000cm2 / (V s at room temperature, which is higher than Carbon nanotubes. Graphene has become a research hotspot because of its unique structure and excellent performance. [0003] How to prepare large-area, ...
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
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B32/19
Inventor 刘强
Owner 林怡君