CN108358196A - Graphene sorting process - Google Patents
Graphene sorting process Download PDFInfo
- Publication number
- CN108358196A CN108358196A CN201810363351.7A CN201810363351A CN108358196A CN 108358196 A CN108358196 A CN 108358196A CN 201810363351 A CN201810363351 A CN 201810363351A CN 108358196 A CN108358196 A CN 108358196A
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- China
- Prior art keywords
- graphene
- sorting process
- initial material
- process according
- mixed liquor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
- C01B32/196—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
Abstract
The present invention relates to a kind of graphene sorting process, graphene initial material is put into liquid, when graphene initial material carries out Brownian movement in a liquid, layer graphene, middle layer graphene and lower layer graphene in formation, upper layer graphene is fished for from liquid by strainer, or upper layer graphene and middle layer graphene, processing finally is dried to the graphene fished for.Such graphene sorting process is mainly the principle using Brownian movement, graphene initial material is purified, by being fished for being located at the substance moved in liquid upper layer or upper layer and middle level in Brownian movement, is sorted in this way, can substantially fish for pure graphene.
Description
Technical field
The present invention relates to a kind of graphene sorting process.
Background technology
Graphene is common material in current high-end electronic element, although, the raw material of processing graphite alkene be price compared with
Low graphite material, still, since existing graphene is the production produced by graphite material is using by way of chemical process
In the process chemical material and to chemical material carry out post-processing cost account for a very big part so that the price of graphene
In dozens of yuan to hundreds of yuan one gram.Graphene is generally divided into single-layer graphene（1-2 layers）, few layer graphene（2-10 layers）And thick-layer
Graphene（11 layers of -10nm）, corresponding price is also from high to low；For lacking layer graphene at present, price is in 200-
250 yuan/gram, just because of so high price, so that its Popularization And Development is hindered.
In the production process of graphene, it inevitably will appear the case where impurity such as graphite are mixed with graphene, therefore
Influence the purity of graphene.
Invention content
The purpose of the present invention is to provide a kind of inexpensive, easy to operate, environmentally friendly graphene sorting process, existing to overcome
There is the deficiency of technology.
The object of the present invention is achieved like this：
A kind of graphene sorting process, it is characterised in that：Graphene initial material is put into liquid, graphene initial material in a liquid into
When row Brownian movement, layer graphene, middle layer graphene and lower layer graphene, upper layer stone is fished for by strainer from liquid in formation
Black alkene or upper layer graphene and middle layer graphene, are finally dried processing to the graphene fished for.Since graphene belongs to
Very light material, Brownian movement will be occurred by placing it in liquid, still, since there are other miscellaneous in graphene initial material
Matter or the crystalline flake graphite etc. that graphene has not yet been formed therefore, can be to Blang by placing in a liquid graphene initial material
The movement stronger substance of situation is judged as graphene.And in Brownian movement, the substance more in liquid upper layer motion, quality is got over
Gently；Therefore, the substance fished for by layer in a liquid and upper layer, substantially belongs to graphene.
The purpose of the present invention can also use following technical measures to solve：
As a kind of more specific scheme, liquid is absolute ethyl alcohol.
As further embodiment, the ratio of graphene initial material and absolute ethyl alcohol is 5-15:85-95.
As further embodiment, the ratio of graphene initial material and absolute ethyl alcohol is 1:9.
As further embodiment, it is dried as freeze-drying process.Alternatively, it is at low-temperature vacuum drying to be dried
Reason.
As further embodiment, graphene initial material is by being formed after being removed to crystalline flake graphite.
As further embodiment, it is 99.9% crystalline flake graphite to select 10 parts of purity, and the crystalline flake graphite is dispersed in
In 90 parts of deionized waters, mixed liquor is formed；Then the mixed liquor certain velocity pressure is equipped with to hit to hard member so that
Most of crystalline flake graphite is removed between layers in mixed liquor, to produce the graphene initial material.
As further embodiment, to the middle layer graphene that do not fish for and lower layer graphene, alternatively, to the lower layer that do not fish for
Graphene is filtered out from absolute ethyl alcohol；Then it is equipped with the deionized water of certain component again, forms mixed liquor；It finally will be described
Mixed liquor is equipped with certain velocity pressure and is hit to hard member so that most of crystalline flake graphite is shelled between layers in mixed liquor
From to produce the graphene initial material.It in this way, can be to avoid the waste of material.
Above-mentioned graphene initial material be likely to occur stripping it is insufficient, alternatively, stripping after formed reunite, it is therefore desirable to be divided
Selection operation.
Beneficial effects of the present invention are as follows：
（1）Such graphene sorting process is mainly the principle using Brownian movement, is purified to graphene initial material, by right
It is located at the substance moved in liquid upper layer or upper layer and middle level in Brownian movement to be fished for, is divided in this way
Choosing, can substantially fish for pure graphene；
（2）Liquid can be absolute ethyl alcohol in such graphene sorting process, which belongs to clean raw material, graphene sorting
Afterwards, absolute ethyl alcohol can be recycled largely, recycling, achieve the purpose that cost-effective, reduction pollution.
Specific implementation mode
The invention will be further described below.
A kind of graphene sorting process, graphene initial material is put into absolute ethyl alcohol, and graphene initial material is in absolute ethyl alcohol
When carrying out Brownian movement, layer graphene, middle layer graphene and lower layer graphene in formation are fished for by strainer from absolute ethyl alcohol
Upper layer graphene and middle layer graphene, are finally dried processing to the graphene fished for.
Graphene initial material and the ratio of absolute ethyl alcohol are 1:9.
Be dried is that freeze-drying process or low-temperature vacuum drying are handled.
Graphene initial material is by being formed after being removed to crystalline flake graphite.It is 99.9% crystalline flake graphite to select 10 parts of purity, and
The crystalline flake graphite is dispersed in 90 parts of deionized waters, mixed liquor is formed；Then the mixed liquor is equipped with to certain speed
Pressure is hit to hard member so that most of crystalline flake graphite is removed between layers in mixed liquor, to produce the graphite
Alkene initial material.
The lower layer graphene that do not fish for is filtered out from absolute ethyl alcohol；Then it is equipped with the deionization of certain component again
Water forms mixed liquor；The mixed liquor is finally equipped with certain velocity pressure to hit to hard member so that big portion in mixed liquor
Crystalline flake graphite is divided to remove between layers, to produce the graphene initial material.
Claims (9)
1. a kind of graphene sorting process, it is characterised in that：Graphene initial material is put into liquid, graphene initial material is in a liquid
When carrying out Brownian movement, layer graphene, middle layer graphene and lower layer graphene in formation fish for upper layer by strainer from liquid
Graphene or upper layer graphene and middle layer graphene, are finally dried processing to the graphene fished for.
2. graphene sorting process according to claim 1, it is characterised in that：Liquid is absolute ethyl alcohol.
3. graphene sorting process according to claim 2, it is characterised in that：Graphene initial material and the ratio of absolute ethyl alcohol are
5-15:85-95。
4. graphene sorting process according to claim 3, it is characterised in that：Graphene initial material and the ratio of absolute ethyl alcohol are
1:9。
5. graphene sorting process according to claim 1, it is characterised in that：It is freeze-drying process to be dried.
6. graphene sorting process according to claim 1, it is characterised in that：Be dried is that low-temperature vacuum drying is handled.
7. graphene sorting process according to claim 1, it is characterised in that：Graphene initial material is by being shelled to crystalline flake graphite
From rear formation.
8. graphene sorting process according to claim 7, it is characterised in that：It is 99.9% scale stone to select 10 parts of purity
Ink, and the crystalline flake graphite is dispersed in 90 parts of deionized waters, form mixed liquor；Then the mixed liquor is equipped with certain
Velocity pressure is hit to hard member so that most of crystalline flake graphite is removed between layers in mixed liquor, described to produce
Graphene initial material.
9. graphene sorting process according to claim 1, it is characterised in that：To the middle layer graphene and lower layer's stone that do not fish for
Black alkene, alternatively, being filtered out from absolute ethyl alcohol to the lower layer graphene that do not fish for；Then it is equipped with the deionization of certain component again
Water forms mixed liquor；The mixed liquor is finally equipped with certain velocity pressure to hit to hard member so that big portion in mixed liquor
Crystalline flake graphite is divided to remove between layers, to produce the graphene initial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363351.7A CN108358196A (en) | 2018-04-21 | 2018-04-21 | Graphene sorting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363351.7A CN108358196A (en) | 2018-04-21 | 2018-04-21 | Graphene sorting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108358196A true CN108358196A (en) | 2018-08-03 |
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ID=63009233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810363351.7A Pending CN108358196A (en) | 2018-04-21 | 2018-04-21 | Graphene sorting process |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019575A (en) * | 2018-08-28 | 2018-12-18 | 大同新成新材料股份有限公司 | A kind of graphene sorting process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003375A (en) * | 2014-05-05 | 2014-08-27 | 北京航空航天大学 | Preparation method for small-size graphene |
| CN105621405A (en) * | 2016-02-29 | 2016-06-01 | 成都新柯力化工科技有限公司 | Method for preparing graphene microchip material with high-pressure water jet pulverizer |
| US9764955B2 (en) * | 2016-01-19 | 2017-09-19 | King Abdulaziz University | Method for producing graphene with a controllable number of layers |
-
2018
- 2018-04-21 CN CN201810363351.7A patent/CN108358196A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003375A (en) * | 2014-05-05 | 2014-08-27 | 北京航空航天大学 | Preparation method for small-size graphene |
| US9764955B2 (en) * | 2016-01-19 | 2017-09-19 | King Abdulaziz University | Method for producing graphene with a controllable number of layers |
| CN105621405A (en) * | 2016-02-29 | 2016-06-01 | 成都新柯力化工科技有限公司 | Method for preparing graphene microchip material with high-pressure water jet pulverizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019575A (en) * | 2018-08-28 | 2018-12-18 | 大同新成新材料股份有限公司 | A kind of graphene sorting process |
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Application publication date: 20180803 |