CN109651891A - A kind of graphene water-based composition, preparation method and graphene water-soluble conducting ink - Google Patents
A kind of graphene water-based composition, preparation method and graphene water-soluble conducting ink Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
Abstract
The present invention provides a kind of graphene water-based composition, preparation method and graphene water-soluble conducting ink, belongs to grapheme material technical field.Graphene water-based composition includes water, dispersant A, dispersant B, graphene and carbon materials, and the D100 in the particle diameter distribution of graphene water-based composition is 30-300 μm, and the fineness of graphene water-based composition is not higher than 15 μm.Graphene water-based composition includes water, dispersant A, dispersant B, graphene and carbon materials, and graphene and carbon materials form loose inlay and construct.Graphene water-soluble conducting ink, including one of graphene water-based composition and resin aqueous emulsion, water-based ink auxiliary agent and cosolvent or a variety of.This graphene water-based composition is obtained using above-mentioned preparation method, and the dispersion effect of graphene water-based composition is more preferable, is made after water-soluble conducting ink, and the resistivity of obtained conductive coating is lower.
Description
Technical field
The present invention relates to grapheme material technical fields, in particular to a kind of graphene water-based composition, its preparation
Method and graphene water-soluble conducting ink.
Background technique
Graphene is that carbon atom with honeycomb hexagon repeated arrangement is formed by a kind of new carbon.It has perfection
Two-dimensional structure, have good electricity, mechanics, calorifics and optical characteristics.But graphene sheet has non-as nano material
Often high specific surface area and complete two-dimensional slice structure, therefore can have quite high glue in the case where very low amount addition
Degree.It can lose flowability substantially in 5% additive amount under normal circumstances.
In the prior art, the dispersion of grapheme material is usually improved by water and organic solvent mixing, but in production
A large amount of organic solvent vapors can be released；Or by carrying out a large amount of graft modifications on the surface of graphene to improve its dispersibility and stream
Dynamic property, but this itself will increase the resistivity of its final gained coating.
Summary of the invention
The purpose of the present invention is to provide a kind of graphene water-based composition, preparation method and graphene waterborne conductive oil
Ink, good dispersion, mobility is strong, and resistivity is low.
In a first aspect, the embodiment of the present invention provides a kind of graphene water-based composition, including water, dispersant A, dispersant B,
Graphene and carbon materials, the D100 in the particle diameter distribution of graphene water-based composition are 30-300 μm, graphene aqueous combination
The fineness of object is not higher than 15 μm.
Limit graphene water-based composition partial size and fineness, mainly limitation graphene water-based composition in graphene and
The partial size and fineness of carbon materials, partial size and fineness within the scope of this can make graphene and carbon materials in water and dispersing agent
Dispersibility more preferably, and since the property of graphene and carbon materials is different, so that it is dispersed in dispersant A and dispersant B respectively
In, dispersion effect is further increased, mobility is more preferable, and is made after conductive coating, has good electric conductivity.
With reference to first aspect, in another embodiment, the D100 in the particle diameter distribution of graphene water-based composition is 30-
100 μm, optionally, the D100 in the particle diameter distribution of graphene water-based composition is 40-60 μm；Optionally, aqueous group of graphene
The fineness for closing object is not higher than 10 μm, and optionally, the fineness of graphene water-based composition is not higher than 5 μm.
With reference to first aspect, in another embodiment, the numerical value of the D100 in the particle diameter distribution of graphene water-based composition
It is 2 times or more of fineness numerical value；Optionally, the numerical value of the D100 in the particle diameter distribution of graphene water-based composition is fineness number
5 times or more of value；Optionally, the numerical value of the D100 in the particle diameter distribution of graphene water-based composition is 20 times of fineness numerical value
Or more.
With reference to first aspect, in another embodiment, dispersant A includes having amphiphilic small molecule compound, dispersion
Agent B includes water-soluble polymer；Optionally, the oleophilic moiety with amphiphilic small molecule compound includes alkane, alkene, alkynes
One of hydrocarbon, aromatic rings, condensed ring are a variety of；Optionally, the hydrophilic segment with amphiphilic small molecule compound includes carbon
One of hydrochlorate, nitrate, sulfonate, sulfate, phosphate, ammonium salt, halogen, hydroxyl, carboxyl and amido are a variety of；It is optional
, dispersant B include polyvinyl alcohol, polyvinylamine, polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid, polyacrylamide,
One of polyurethane, water-base epoxy polymer and water-soluble cellulose are a variety of.
Using with amphiphilic small molecule compound dispersant A dispersed graphite alkene, water-soluble polymer dispersant B dispersion
Carbon materials keep the dispersion effect of graphene and carbon materials more preferable, and the mobility of obtained graphene water-based composition is more preferably.
With reference to first aspect, in another embodiment, graphene accounts for the mass percent of graphene water-based composition and is
1%-20%；Optionally, it is 5%-10% that graphene, which accounts for the mass percent of graphene water-based composition,.
Optionally, graphene is laminated structure, and the transversal flaps diameter of laminated structure is 2-100 μm；Optionally, laminated structure
Transversal flaps diameter be 10-100 μm；Optionally, the transversal flaps diameter of laminated structure is 15-50 μm.In conductive coating made of making
Overlapped points will not be excessive between graphene, and conductivity is larger, and will not agglomerate.
Optionally, the mass ratio of graphene, carbon materials and dispersing agent is followed successively by (1-3): (1-3): (0.1-1),
In, dispersing agent includes dispersant A and dispersant B.Make its good fluidity, will not reunite, there is good wellability, so that
More preferably, obtained conductive coating conducts electricity very well the uniformity of the ink arrived.With reference to first aspect, in another embodiment,
Carbon materials include one of carbon black, carbon nanotube, graphite, fullerene and carbon fiber or a variety of；Optionally, carbon materials packet
Include one of carbon black, carbon nanotube and graphite or a variety of.
Second aspect, the embodiment of the present invention provide a kind of graphene water-based composition, including water, dispersant A, dispersant B,
Graphene and carbon materials, graphene and carbon materials form loose inlay and construct；Wherein, graphene layer and carbon materials layer are mutual
Mutually loosely it is embedded.
Since graphene and carbon materials form loose inlay, can have while the carbon of high-content lower viscous
Degree, keeps graphene and carbon materials evenly dispersed in water dispersant A aqueous solution and dispersant B aqueous solution respectively, has high-carbon
There is good mobility, the conductive coating surface made is smooth, and good conductivity while content.The third aspect, this hair
Bright embodiment provides a kind of preparation method of graphene water-based composition, includes the following steps: using water, dispersant A and graphite
Alkene prepares graphene aqueous liquid dispersion；Water, dispersant B and carbon materials are mixed, shearing dispersion obtains carbon materials water
Property dispersion liquid；Graphene aqueous liquid dispersion is mixed into dispersion with carbon materials aqueous liquid dispersion and obtains graphene water-based composition；
Wherein, the D100 in the particle diameter distribution of graphene water-based composition is 30-300 μm, and the fineness of graphene water-based composition is not high
In 15 μm.
Graphene and carbon materials are separately dispersed, and according to the property of the two, graphene divides in water and dispersant A
It dissipates, carbon materials disperse in water and dispersant B, and dispersion is more uniform, and after two kinds of dispersion liquids dispersions, what is be mixed
When, loose inlay is capable of forming between graphene and carbon materials, the surface of graphene layer forms carbon materials layer, carbon material
The surface of the bed of material forms graphene layer, the graphene water-based composition carbon content with higher made and has lower viscous
Degree, good fluidity, after conductive coating is made, surface is smooth, good conductivity.
Fourth aspect, the present invention provide a kind of graphene water-soluble conducting ink, including graphene water-based composition, aqueous tree
Fat liquor and one or both of water-based ink auxiliary agent and cosolvent.
Obtained graphene water-soluble conducting ink is used to prepare conductive coating, and surface is smooth, will not reunite, electric conductivity
It is good.
In conjunction with fourth aspect, in another embodiment, it is in the viscosity of (25 ± 1) DEG C graphene water-soluble conducting ink
100-3000cp；It optionally, is 1000-2000cp in the viscosity of (25 ± 1) DEG C graphene water-soluble conducting ink.
The viscosity of graphene water-soluble conducting ink is low, good fluidity, is not susceptible to reunite, the conduction of obtained conductive coating
Effect is good.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings and also belong to protection scope of the present invention.
Fig. 1 is the scanning electron microscope (SEM) photograph for the conductive coating that the embodiment of the present invention 4 obtains；
Fig. 2 is the scanning electron microscope (SEM) photograph for the conductive coating that the embodiment of the present invention 5 obtains；
Fig. 3 is the scanning electron microscope (SEM) photograph for the conductive coating that comparative example 3 of the present invention obtains.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Graphene water-based composition, preparation method and graphene waterborne conductive oil are utilized to the embodiment of the present invention below
Ink is specifically described.
Graphene water-based composition includes water, dispersant A, dispersant B, graphene and carbon materials, and aqueous group of graphene
Closing the D100 in the particle diameter distribution of object is 30-300 μm, and the fineness of graphene water-based composition is not higher than 15 μm.
D100 in the particle diameter distribution of graphene water-based composition is 30-300 μm, the fineness of graphene water-based composition
Not higher than 15 μm, D100 in the particle diameter distribution of graphene and carbon materials is 30-300 μm, graphene water-based composition it is thin
Degree is not higher than 15 μm, and partial size and fineness within the scope of this can make the dispersibility of graphene and carbon materials in water and dispersing agent
More preferably, mobility is more preferable, and loose inlay structure is formed between graphene and carbon materials.
It should be noted that particle diameter distribution be measured using laser light scattering principle it is being calculated as a result, to particle
Itself destruction is not had, therefore what is measured is its partial size for forming offspring that loose inlay constructs, wherein what D100 referred to
Maximum particle diameter, that is to say, that the maximum particle diameter in the particle diameter distribution of graphene water-based composition is 30-300 μm.
Hegman fineness grind test is to scrape the test carried out using two pieces of stainless steel plates, has shear action for aggregate,
Therefore what is surveyed is the result after offspring is opened.If can not separate if tight agglomeration, what is measured is still offspring
Partial size loose inlay structure is still formed between graphene and carbon materials provided in this embodiment, so, can open
Offspring measures primary particle construction.
Further, the structure of graphene and carbon materials is different, carries out in dispersant A and in dispersant B respectively
Dispersion, the dispersion effect of the two is more preferable, and the viscosity of obtained graphene water-based composition is low, and mobility is good.
A kind of graphene water-based composition, including water, dispersant A, dispersant B, graphene and carbon materials, graphene with
Carbon materials form loose inlay construction；Wherein, graphene layer is loosely embedded mutually with carbon materials layer.
Graphene water-based composition provided in an embodiment of the present invention, due to being constructed with loose inlay, in laser particle analyzer
In the partial size that measures be offspring partial size, the partial size measured in Hegman grind gage is the grain of primary particle after particle is opened
Diameter, therefore, the result of D100 is significantly higher than the result of Hegman fineness grind in particle diameter distribution result.
Optionally, the D100 in the particle diameter distribution of graphene water-based composition is 30-100 μm, optionally, graphene water
Property composition particle diameter distribution in D100 be 40-60 μm；Optionally, the fineness of graphene water-based composition is not higher than 10 μm,
Optionally, the fineness of graphene water-based composition is not higher than 5 μm.
Optionally, the numerical value of the D100 in the particle diameter distribution of graphene water-based composition is 2 times or more of fineness numerical value；
Optionally, the numerical value of the D100 in the particle diameter distribution of graphene water-based composition is 5 times or more of fineness numerical value；Optionally,
The numerical value of D100 in the particle diameter distribution of graphene water-based composition is 20 times or more of fineness numerical value.
The value of D100 in the dispersion effect of graphene water-based composition and the particle diameter distribution of graphene water-based composition with
And the value of the fineness of graphene water-based composition is related, and the multiple gap of the two is bigger, dispersion effect is better, mobility
It is stronger.
Wherein, dispersant A includes having amphiphilic small molecule compound, and dispersant B includes water-soluble polymer.Due to
The graphene property different with carbon materials, graphene are easier to disperse in dispersant A and water, and carbon materials are more easier
It is dispersed in dispersant B and water, keeps the dispersion effect of the two good, the graphene and carbon of obtained graphene water-based composition
Loose inlay construction is formed between material.
Wherein, dispersant A is that have amphiphilic small molecule compound, and small molecule compound refers to monomer herein.It is optional
, the oleophilic moiety with amphiphilic small molecule compound of dispersant A includes alkane, alkene, alkynes, aromatic rings, condensed ring
One of or it is a variety of；Optionally, the hydrophilic segment with amphiphilic small molecule compound of dispersant A include carbonate,
One of nitrate, sulfonate, sulfate, phosphate, ammonium salt, halogen, hydroxyl, carboxyl and amido are a variety of.
Optionally, dispersant A includes lauryl sodium sulfate, cetyl trimethylammonium bromide, dodecyl benzene sulfonic acid
One of sodium, sodium benzoate and sodium metnylene bis-naphthalene sulfonate are a variety of.
Optionally, dispersant B include polyvinyl alcohol, polyvinylamine, polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid,
One of polyacrylamide, polyurethane, water-base epoxy polymer and water-soluble cellulose are a variety of.
The mass percent that graphene accounts for graphene water-based composition is 1%-20%；Optionally, graphene accounts for graphene
The mass percent of water-based composition is 5%-10%.Optionally, the mass ratio of graphene, carbon materials and dispersing agent is successively
For (1-3): (1-3): (0.1-1), wherein dispersing agent includes dispersant A and dispersant B.
Relative to graphene, carbon materials content is very few, and the viscosity of graphene water-based composition can be very high, it is difficult to process；
Carbon materials too high levels, carbon materials can surround graphene in graphene water-based composition, reunite, keep graphene aqueous
When composition is used to prepare conductive coating, electric conductivity is deteriorated.The additive amount of dispersing agent is very few, graphene and carbon materials
It is difficult to well infiltrate in water-based system, floating carbon can be generated in liquid level, influence graphene water-based composition and pass through graphene
The uniformity for the electrically conductive ink that water-based composition is formed；The additive amount of dispersing agent is excessive, is formed by graphene water-based composition
Electrically conductive ink ink made from conductive coating electric conductivity be deteriorated.
Further, the amount of dispersant A and dispersant B is related with the amount of graphene and carbon materials, the content of graphene
More, then the content of dispersant A is higher, and the content of carbon materials is more, then the content of dispersant B is higher.That is, graphite
The mass ratio of alkene and carbon materials is a, and the mass ratio of dispersant A and dispersant B is b, then a:b=0.8-1.2.
Further, graphene is laminated structure, and the transversal flaps diameter of laminated structure is 2-100 μm；Optionally, sheet knot
The transversal flaps diameter of structure is 10-100 μm；Optionally, the transversal flaps diameter of laminated structure is 15-50 μm.Transversal flaps diameter is too small, is made
Conductive coating in overlapped points it is excessive, it is bigger than normal to will lead to overall electrical resistance；Lamella is excessive, and it is agglomerating to be easy to produce curling, occurs solidifying
Collection.
In the present embodiment, carbon materials include one of carbon black, carbon nanotube, graphite, fullerene and carbon fiber or more
Kind；Optionally, carbon materials include one of carbon black, carbon nanotube and graphite or a variety of.
The preparation method of above-mentioned graphene water-based composition, includes the following steps:
(1), graphene aqueous liquid dispersion is prepared using water, dispersant A and graphene.Wherein, dispersant A is above-mentioned dispersion
Agent A, high speed shear obtains graphene aqueous liquid dispersion, optionally, high speed shear after water, dispersant A and graphene are mixed
Shear velocity are as follows: dispersion impeller, airslide disintegrating mill can be used, at ultrasonic wave in 5000rpm-24000rpm, high speed shear dispersion
One of reason device, ball mill, sand mill or a variety of combinations are dispersed to obtain graphene aqueous liquid dispersion.
Optionally, graphene can be the graphene that liquid phase stripping method obtains.Liquid phase stripping method is that first graphite dispersion exists
In solvent, by the means up-stripping such as ultrasound, microwave, shearing force, thermal stress and electrochemistry, it is centrifugally separating to obtain graphite
Alkene.Dispersion effect of the graphene that liquid phase stripping method obtains in dispersant A and water is more preferable.
(2), water, dispersant B and carbon materials are mixed, shearing dispersion obtains carbon materials aqueous liquid dispersion.Its
In, dispersant B is above-mentioned dispersant B, and shearing dispersion is above-mentioned high speed shear dispersion, and above-mentioned dispersion impeller, gas can be used
One of stream pulverizer, processor for ultrasonic wave, ball mill, sand mill or a variety of combinations are dispersed to obtain carbon materials water
Property dispersion liquid.
(3), graphene aqueous liquid dispersion is mixed with carbon materials aqueous liquid dispersion to dispersion and obtains graphene aqueous combination
Object.Mixing dispersion generally uses agitating paddle or/and mixing tank, and during mixing dispersion, in graphene aqueous liquid dispersion
Graphene and carbon materials aqueous liquid dispersion in carbon materials form loose inlay construction, obtained graphene aqueous combination
The good dispersion of object, mobility is strong, and viscosity is low in the higher situation of carbon content.
Graphene water-soluble conducting ink includes graphene water-based composition, resin aqueous emulsion and water-based ink auxiliary agent
One or both of with cosolvent.
Resin aqueous emulsion i.e. resinoid bond mix resin aqueous emulsion with graphene water-based composition, shape
At graphene water-soluble conducting ink, the conductive coating with cohesive force can be formed.Water-based ink auxiliary agent and cosolvent can roots
It is added according to actual conditions.
In order to improve filming performance, water-based ink auxiliary agent, example can be added according to the demand of graphene water-soluble conducting ink
Such as: water-based ink auxiliary agent includes one in levelling agent, thickener, defoaming agent, pH adjusting agent, mould inhibitor, drying retardant and quick dry agent
Kind is a variety of.Cosolvent is to aid in water-based ink auxiliary agent resin aqueous emulsion dispersion in ink or only dilution ink is solid
The solvent of content.Wherein, solvent can be inorganic solvent or/and organic solvent.Wherein, inorganic solvent is water；Organic solvent packet
Include ethyl alcohol, ethylene glycol, propyl alcohol, propylene glycol, isopropanol, acetone, butanol, butanediol, isobutanol, butanone, isobutyl ketone, N- methyl
In pyrrolidones, n,N-Dimethylformamide, n,N-dimethylacetamide, dimethyl sulfoxide, tetrahydrofuran and dioxane
It is one or more.
Optionally, in order to increase the electric conductivity of graphene water-soluble conducting ink, the content of organic cosolvent in cosolvent
Not higher than 5%, optionally, the content of organic cosolvent is 0.
Wherein, in graphene water-soluble conducting ink, conductive filler (gross mass of graphene and carbon materials) accounts for solid content
The mass percent of (conductive coating) is 20%-60%, and the mass percent that conductive filler accounts for solid content is 30%-50%,
The mass percent that conductive filler accounts for solid content is 40%-60%.Wherein, solid content refers to graphene water-soluble conducting ink system
After conductive coating, the quality of conductive coating, graphene water-soluble conducting ink is made after conductive coating, consisting of leading
The gross mass of electric filler, resin and auxiliary agent.
Graphene water-soluble conducting ink is 100-3000cp in the viscosity of (25 ± 1) DEG C graphene water-soluble conducting ink；
It optionally, is 1000-2000cp in the viscosity of (25 ± 1) DEG C graphene water-soluble conducting ink.Wherein, viscosity determining procedure are as follows:
It is tested using NDJ-5 rotational viscometer, controls fluid to be measured temperature at 25 ± 1 DEG C, using No. 3 rotors in 30rpm condition
Under tested.If other model rotors and other speed conditions when other than its range ability, may be selected in institute's viscosimetric.It obtains
Graphene water-soluble conducting ink viscosity it is lower, dispersion effect is preferable, and the conductive effect of obtained conductive coating is more preferably.
It is using the method that graphene water-soluble conducting ink prepares conductive coating: graphene water-soluble conducting ink is passed through into painting
Cloth or the mode of printing are formed in PET film, and during coating or printing, and thin layer high speed shear can be undergone to transport
It is dynamic, loose inlay can be constructed shearing and broken up, and restore to pull out a wet film by bar between loose inlay construction at it,
It is smooth to obtain conductive coating surface, and has very high electric conductivity for 100 DEG C of drying and shapings in an oven.
Embodiment one
Here is the parameter such as table 1 of each component for the graphene water-based composition that embodiment provides,
The parameter of each component of 1 graphene water-based composition of table
In the case where other conditions are constant, graphene aqueous liquid dispersion is prepared using the parameter in above-mentioned table 1, and
(25 ± 1) DEG C carry out viscosity test using NDJ-5 rotational viscometer, obtain table 2,
The viscosity of 2 graphene water-based composition of table
From table 2 it can be seen that comparative example 5 (only addition dispersant A), comparative example 4 (only addition dispersant B), comparative example 3
(only addition graphene, be added without carbon materials), comparative example 2 (fineness of graphene water-based composition is larger), 1 (stone of comparative example
D100 is larger in the particle diameter distribution of black alkene water-based composition), the viscosity of obtained graphene water-based composition is big, and dispersibility is not
Good, mobility is bad.The value that can be seen that D100/ fineness compared with embodiment 1 from embodiment 4 is bigger, graphene aqueous combination
The viscosity of object is smaller, and dispersibility is higher, and mobility is more preferable.The viscosity of the graphene water-based composition of embodiment 2-4 is smaller, point
Scattered property is higher, and mobility is more preferable.From embodiment 5 as can be seen that when the content of carbon materials is higher, graphene water-based composition
Viscosity it is relatively large.
Embodiment two
Graphene water is formed after addition epoxy adhesive in the graphene water-based composition that embodiment one provides
Property electrically conductive ink, and prepare conductive coating using the above method, measure the body resistivity of conductive coating, measuring method is: is logical
It crosses four probe method and measures coating surface resistivity, coating layer thickness is measured by micrometer caliper, body resistivity multiplies equal to surface resistivity
With thickness.Table 3 is obtained,
The body resistivity of 3 conductive coating of table
From table 3 it can be seen that comparative example 5 (only addition dispersant A), comparative example 4 (only addition dispersant B), comparative example 3
(only addition graphene, be added without carbon materials), comparative example 2 (fineness of graphene water-based composition is larger) and comparative example 1
(D100 is larger in the particle diameter distribution of graphene water-based composition), the conductive coating as made from graphene water-soluble conducting ink
Body resistivity is larger, and electric conductivity is bad.The value that can be seen that D100/ fineness compared with embodiment 1 from embodiment 4 is bigger, passes through
The electric conductivity of conductive coating made from graphene water-soluble conducting ink is better.Embodiment 2-4's passes through graphene waterborne conductive oil
The good conductivity of conductive coating made from ink.From embodiment 5 as can be seen that when the content of carbon materials is higher, pass through graphite
The body resistivity of conductive coating made from alkene water-soluble conducting ink is relatively large.
Embodiment three
Embodiment 4, embodiment 5 and comparative example 3 conductive coating as made from graphene water-soluble conducting ink are being scanned
Shooting obtains scanning electron microscope (SEM) photograph under Electronic Speculum, and embodiment 4 obtains Fig. 1, and embodiment 5 obtains Fig. 2, and comparative example 3 obtains Fig. 3, from three width
For figure as can be seen that the conductive coating smoothness in Fig. 1 is preferable, the conductive coating in Fig. 2 has a small amount of agglomeration, leading in Fig. 3
Electrocoat does not flow substantially, rough.
Example IV
Graphene water-based composition is carried out for the parameter of each component provided using the embodiment 4 in above-described embodiment one
Preparation.
The preparation method of embodiment 6 is: water, dispersant A and graphene being mixed, shearing dispersion obtains graphene water
Property dispersion liquid；Water, dispersant B and carbon materials are mixed, shearing dispersion obtains carbon materials aqueous liquid dispersion；By graphite
Alkene aqueous liquid dispersion mixes dispersion with carbon materials aqueous liquid dispersion and obtains graphene water-based composition.
The preparation method of comparative example 6 is: water, dispersant A, graphene, carbon materials shearing dispersion are obtained graphene water
Property composition.
The preparation method of comparative example 7 is: water, dispersant B and graphene being mixed, shearing dispersion obtains graphene water
Property dispersion liquid；Water, dispersant A and carbon materials are mixed, shearing dispersion obtains carbon materials aqueous liquid dispersion；By graphite
Alkene aqueous liquid dispersion mixes dispersion with carbon materials aqueous liquid dispersion and obtains graphene water-based composition.
Embodiment 6, the graphene water that comparative example 6 and comparative example 7 obtain are detected respectively using the method that embodiment one provides
Property composition viscosity, and graphene water-soluble conducting ink is made in the method provided using embodiment two, and detects and pass through stone
The body resistivity for the conductive coating that black alkene water-soluble conducting ink is prepared, obtains table 4,
The viscosity of 4 graphene water-based composition of table and the body resistivity of conductive coating
| Embodiment 6 | Comparative example 6 | Comparative example 7 | |
| Viscosity/cp | 285 | 1845 | 1078 |
| Body resistivity/Ω cm | 0.12 | 0.42 | 0.38 |
From table 4, it can be seen that compared with comparative example 6 and comparative example 7,6 aqueous group of graphene provided through this embodiment
The viscosity for the graphene water-based composition that the preparation method of conjunction object is prepared is low, good fluidity, and dispersibility is high.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of graphene water-based composition, which is characterized in that including water, dispersant A, dispersant B, graphene and carbon material
Material, the D100 in the particle diameter distribution of the graphene water-based composition are 30-300 μm, the graphene water-based composition it is thin
Degree is not higher than 15 μm.
2. graphene water-based composition according to claim 1, which is characterized in that the grain of the graphene water-based composition
D100 in diameter distribution is 30-100 μm, and optionally, the D100 in the particle diameter distribution of the graphene water-based composition is 40-
60μm；
Optionally, the fineness of the graphene water-based composition is not higher than 10 μm, optionally, the fineness of graphene water-based composition
Not higher than 5 μm.
3. graphene water-based composition according to claim 2, which is characterized in that the grain of the graphene water-based composition
The numerical value of D100 in diameter distribution is 2 times or more of fineness numerical value；
Optionally, the numerical value of the D100 in the particle diameter distribution of the graphene water-based composition is 5 times or more of fineness numerical value；
Optionally, the numerical value of the D100 in the particle diameter distribution of the graphene water-based composition be 20 times of fineness numerical value and with
On.
4. graphene water-based composition according to claim 1, which is characterized in that the dispersant A includes having amphiphilic
The small molecule compound of property, the dispersant B includes water-soluble polymer；
Optionally, the oleophilic moiety with amphiphilic small molecule compound include alkane, it is alkene, alkynes, aromatic rings, thick
One of ring is a variety of；
Optionally, the hydrophilic segment with amphiphilic small molecule compound includes carbonate, nitrate, sulfonate, sulphur
One of hydrochlorate, phosphate, ammonium salt, halogen, hydroxyl, carboxyl and amido are a variety of；
Optionally, the dispersant B include polyvinyl alcohol, polyvinylamine, polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid,
One of polyacrylamide, polyurethane, water-base epoxy polymer and water-soluble cellulose are a variety of.
5. graphene water-based composition according to claim 1, which is characterized in that the graphene accounts for the graphene water
Property composition mass percent be 1%-20%；Optionally, the graphene accounts for the quality of the graphene water-based composition
Percentage is 5%-10%；
Optionally, the graphene is laminated structure, and the transversal flaps diameter of the laminated structure is 2-100 μm；Optionally, described
The transversal flaps diameter of laminated structure is 10-100 μm；Optionally, the transversal flaps diameter of the laminated structure is 15-50 μm；
Optionally, the mass ratio of the graphene, the carbon materials and the dispersing agent is followed successively by (1-3): (1-3):
(0.1-1), wherein the dispersing agent includes dispersant A and dispersant B.
6. graphene water-based composition according to claim 1, which is characterized in that the carbon materials include carbon black, carbon
One of nanotube, graphite, fullerene and carbon fiber are a variety of；
Optionally, carbon materials include one of carbon black, carbon nanotube and graphite or a variety of.
7. a kind of graphene water-based composition, which is characterized in that including water, dispersant A, dispersant B, graphene and carbon material
Material, the graphene and the carbon materials form loose inlay and construct；Wherein, graphene layer and carbon materials layer are loose mutually
It is embedded.
8. a kind of preparation method of graphene water-based composition, which comprises the steps of:
Graphene aqueous liquid dispersion is prepared using water, dispersant A and graphene；
Water, dispersant B and carbon materials are mixed, shearing dispersion obtains carbon materials aqueous liquid dispersion；
The graphene aqueous liquid dispersion is mixed into dispersion with the carbon materials aqueous liquid dispersion and obtains graphene aqueous combination
Object；
Wherein, the D100 in the particle diameter distribution of the graphene water-based composition is 30-300 μm, the graphene aqueous combination
The fineness of object is not higher than 15 μm.
9. a kind of graphene water-soluble conducting ink, which is characterized in that including the described in any item graphene water of claim 1-7
Property composition, resin aqueous emulsion and one or both of water-based ink auxiliary agent and cosolvent.
10. graphene water-soluble conducting ink according to claim 9, which is characterized in that in (25 ± 1) DEG C graphene
The viscosity of water-soluble conducting ink is 100-3000cp；Optionally, in the viscous of (25 ± 1) DEG C described graphene water-soluble conducting ink
Degree is 1000-2000cp.
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| CN114276713A (en) * | 2021-12-10 | 2022-04-05 | 江南大学 | High-conductivity water-based graphene ink and preparation method thereof |
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