CN105712331A - Medium for graphene stripping - Google Patents
Medium for graphene stripping Download PDFInfo
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- CN105712331A CN105712331A CN201410710831.8A CN201410710831A CN105712331A CN 105712331 A CN105712331 A CN 105712331A CN 201410710831 A CN201410710831 A CN 201410710831A CN 105712331 A CN105712331 A CN 105712331A
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Abstract
The invention discloses a medium for graphene stripping. The medium is composed of the following components by weight: 100 parts of an alcohol solvent, 50-80 parts of polyacrylic ester or polyacrylic ester derivative, 0.5-4 parts of silicon dioxide/poly(methyl methacrylate-styrene) double-shell composite microspheres, and 0.5-5 parts of a water-soluble salt. According to the invention, polyacrylic ester or polyacrylic ester derivative with glue adhesiveness is added into the stripping medium, the combined solution can be used in coordination with grinding or stirring so as to reduce the requirement for grinding or stirring speed. Through cooperation with the silicon dioxide/polymer composite microspheres, a great stripping effect can be generated to graphite, and the shell can be deformable and is not easy to fragment graphene. In addition, the water-soluble salt added into the system can improve the conductivity of the system, superimposition of stripped graphene again can be avoided, especially static electricity on the surfaces of the silicon dioxide/polymer composite microspheres can be eliminated, so that the stripped graphene can maintain a disperse state.
Description
Technical field
The present invention relates to Graphene production technical field, being specifically related to a kind of for graphite being peeled off the medium for Graphene.
Background technology
Graphene is a kind of two-dimensional material with good flexibility, electrical property.You need to add is that, stricti jurise is said, Graphene is the lamellar of a kind of monolayer；But due to the preparation difficulty of single-layer graphene, generally also the form the few-layer graphene alkene with similar performance is also ranged in the category of Graphene.
At present, the method that prepared by Graphene mainly has: chemically grown method and physics stripping method.Low compared to efficiency, be not suitable for the chemically grown method of industrialized mass production; it is raw material that physics stripping method mainly adopts cheap graphite; make graphite layers peeling-off by graphite crystal is applied mechanical force; break the Van der Waals force of graphite layers; forming monolithic graphite alkene or form the few-layer graphene alkene, this physical separation methods has more industrial prospect and applicable large-scale production.
In Graphene stripping process, it is necessary to add some auxiliary agents, to increase the interlayer distance of graphite or so-called intercalation, so that graphite is peeled off better.As adopted nitric acid, potassium permanganate, chromic acid or hydrogen peroxide as oxidant, concentrated sulphuric acid, as intercalator, introduces the oxy radicals such as hydroxyl, epoxide group and carboxyl at graphite layers or edge, increase graphite layers from, be beneficial to follow-up graphite layers and peel off.But this chemical substance intercalated technique acid consumption is big, production process has the pollution of the harmful gass such as SOx, NOx or heavy metal ion, product there is sulfur remain, the Graphene finally given is easily generated defect, and in the application equipment there is is corrosion, reduce the service life of equipment, add production cost.
Summary of the invention
It is an object of the invention to overcome the defect existed in prior art, it is provided that the medium that a kind of Graphene is peeled off, the medium cooperative mechanical of this stripping is ground, it is possible to be efficiently peeled off graphite, and the structural deterioration of Graphene is little.
For realizing the purpose of the present invention, the technical scheme is that the medium that a kind of Graphene is peeled off, the composition of this medium includes:
Alcohols solvent 100 parts,
Polyacrylate or polyacrylate derivatives 50～80 parts,
Silicon dioxide/polymer composite microsphere 0.5～10 part,
Water soluble salt 0.5～5 part；
Wherein, each component is in its parts by weight.
Preferred technical scheme is, the particle diameter of described silicon dioxide/polymer composite microsphere is below 20 microns, and the particle diameter of described silicon dioxide is more than 50 nanometers, and described polymer layer of thickness is more than 10 nanometers.
Preferred technical scheme is, described silicon dioxide/polymer composite microsphere is silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere.
Preferred technical scheme is, described alcohols solvent is one or more in ethanol, normal propyl alcohol, n-butyl alcohol, propylene glycol and terpineol.
Preferred technical scheme is, the number-average molecular weight of described polyacrylate or polyacrylate derivatives is more than 100000.
Preferred technical scheme is, described water soluble salt is the one in lithium fluoride, sodium fluoride, sodium chloride, lithium chloride.
Prior art is compared, the medium that Graphene of the present invention is peeled off is added with the polyacrylate or polyacrylate derivatives with glue viscosity, use this combination liquid to coordinate to grind or stirring, the requirement to grinding or mixing speed can be reduced, it is not necessary to graphite flake layer ultra high shear can be realized the stripping to Graphene；Coordinating silicon dioxide/polymer composite microsphere, the core of silicon dioxide/polymer composite microsphere is stone, it is possible to graphite produces big release effect and shell deformable, non-friable functionalized graphene；The water soluble salt additionally added in system can improve the electric conductivity of system, avoid the Graphene peeled off because electrostatic is superimposed together again, particularly eliminate the electrostatic on silicon dioxide/polymer composite microsphere surface, make the Graphene after stripping keep the dispersity after peeling off.The medium that this Graphene is peeled off is being peeled off while Graphene, and not etching apparatus does not damage graphene-structured.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
The present invention is the medium that a kind of Graphene is peeled off, and the composition of this medium includes: ethanol 100 parts by weight, polyacrylate 50 parts by weight, silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere 0.5 parts by weight, lithium fluoride 2 parts by weight.Wherein, the particle diameter of silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere is below 20 microns, and the particle diameter of silica core is more than 50 nanometers, and the thickness of shell is more than 10 nanometers；The number-average molecular weight of polyacrylate is more than 100000.
Embodiment 2
The present invention is the medium that a kind of Graphene is peeled off, and the composition of this medium includes: ethanol 50 parts by weight, normal propyl alcohol 50 parts by weight, polyurethane-modified polyacrylate 80 parts by weight, silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere 5 parts by weight, sodium fluoride 5 parts by weight.Wherein, the particle diameter of silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere is below 20 microns, and the particle diameter of silica core is more than 50 nanometers, and the thickness of shell is more than 10 nanometers；The number-average molecular weight of polyurethane-modified polyacrylate is more than 100000.
Embodiment 3
The present invention is the medium that a kind of Graphene is peeled off, and the composition of this medium includes: n-butyl alcohol 40 parts by weight, propylene glycol 60 parts by weight, polyurethane-modified polyacrylate 60 parts by weight, silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere 2 parts by weight, sodium chloride 0.5 parts by weight.Wherein, the particle diameter of silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere is below 20 microns, and the particle diameter of silica core is more than 50 nanometers, and the thickness of shell is more than 10 nanometers；The number-average molecular weight of polyurethane-modified polyacrylate is more than 100000.
Embodiment 4
The present invention is the medium that a kind of Graphene is peeled off, and the composition of this medium includes: terpineol 100 parts by weight, polyacrylate 70 parts by weight, silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere 10 parts by weight, lithium chloride 3 parts by weight.Wherein, the particle diameter of silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere is below 20 microns, and the particle diameter of silica core is more than 50 nanometers, and the thickness of shell is more than 10 nanometers；The number-average molecular weight of polyacrylate is more than 100000.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. the medium that a Graphene is peeled off, it is characterised in that the composition of this medium includes:
Alcohols solvent 100 parts,
Polyacrylate or polyacrylate derivatives 50～80 parts,
Silicon dioxide/polymer composite microsphere 0.5～10 part,
Water soluble salt 0.5～5 part；
Wherein, each component is in its parts by weight.
2. the medium that Graphene as claimed in claim 1 is peeled off, it is characterised in that the particle diameter of described silicon dioxide/polymer composite microsphere is below 20 microns, and the particle diameter of described silicon dioxide is more than 50 nanometers, and described polymer layer of thickness is more than 10 nanometers.
3. the medium that Graphene as claimed in claim 2 is peeled off, it is characterised in that described silicon dioxide/polymer composite microsphere is silicon dioxide/poly-(Methyl Methacrylate-Styrene) bivalve layer complex microsphere.
4. the medium that Graphene as claimed in claim 1 is peeled off, it is characterised in that described alcohols solvent is one or more in ethanol, normal propyl alcohol, n-butyl alcohol, propylene glycol and terpineol.
5. the medium that Graphene as claimed in claim 1 is peeled off, it is characterised in that the number-average molecular weight of described polyacrylate or polyacrylate derivatives is more than 100000.
6. the medium that Graphene as claimed in claim 1 is peeled off, it is characterised in that described water soluble salt is the one in lithium fluoride, sodium fluoride, sodium chloride, lithium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710831.8A CN105712331A (en) | 2014-12-01 | 2014-12-01 | Medium for graphene stripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710831.8A CN105712331A (en) | 2014-12-01 | 2014-12-01 | Medium for graphene stripping |
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| Publication Number | Publication Date |
|---|---|
| CN105712331A true CN105712331A (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410710831.8A Pending CN105712331A (en) | 2014-12-01 | 2014-12-01 | Medium for graphene stripping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499622A (en) * | 2020-12-17 | 2021-03-16 | 无锡菲勒高性能材料有限公司 | Silicon dioxide and graphene composite powder material and preparation method and application thereof |
-
2014
- 2014-12-01 CN CN201410710831.8A patent/CN105712331A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499622A (en) * | 2020-12-17 | 2021-03-16 | 无锡菲勒高性能材料有限公司 | Silicon dioxide and graphene composite powder material and preparation method and application thereof |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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| WD01 | Invention patent application deemed withdrawn after publication |