CN107904612A - A kind of method that nano carbon sol is prepared with native graphite - Google Patents
A kind of method that nano carbon sol is prepared with native graphite Download PDFInfo
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Abstract
The present invention relates to a kind of method for preparing nano carbon sol, the described method includes：The system for including anode, cathode and electrolyte aqueous solution is provided, wherein the anode and the cathode are native graphite pressboard；The anode and the cathode are connected so as to obtain the nano carbon sol for including nano carbon particle with the pulse power, the particle diameter of the nano carbon particle is 1nm to 100nm；Wherein, the bulk density of the native graphite pressboard is 1.3g/cm3‑2.8g/cm3.The method of the present invention can significantly reduce cost, specifically, be reduced to substantially the 1/8 to 1/10 of former cost, meet production requirement, suitable for large-scale industrial production.
Description
Technical field
Nano carbon sol is prepared the present invention relates to the method for preparing nano carbon sol, more particularly to by natural graphite material
Method.
Background technology
Nano material refers to that the bulk of the constituent of constituent material is at least one-dimensional and is in nanoscale (0.1nm-
100nm) the material of scope.When carbon is in nanoscale scope, there is the particularity that many stock size carbon materials do not have
Can, nano-carbon material is widely used in the neck such as electric heating material, manufacturing battery, magnetic pipe recording material, agricultural, Aeronautics and Astronautics
Domain, purposes are quite varied.
Nano carbon sol is prepared with electrode method to have been described in the prior art.CN104591855B is related to a kind of electrode method
Prepare nano carbon sol and then the method for preparing nano-carbon powder.Wherein, the anode in its used preparation system and cathode are adopted
With high purity graphite of the purity more than 99%, but the complex production process of high purity graphite and production cost is high, so as to cause
The economic benefit of this method is relatively low.CN106544689A and CN106517142A is described respectively utilizes graininess or powdered ore deposit
The method that thing carbon or biological carbon prepare nano carbon sol, wherein, the graininess or powdered being placed in porous insulation container
Conductive mineral carbon or biological carbon are placed between two pieces of electrodes, are electrolysed under carbon nano-solution system molten to prepare nano-sized carbon
Glue.However, this two documents are required without the specific size for recording mineral carbon or biological carbon source materials and material source, this
There are many uncertain influence factors for a little methods.
Therefore, it is necessary to one kind can effectively reduce cost, meet production requirement, suitable for the preparation of large-scale industrial production
The method of nano carbon sol.
The content of the invention
The object of the present invention is to provide one kind can effectively reduce cost, meet production requirement, suitable for heavy industrialization
The method for preparing nano carbon sol of production.
The present invention provides a kind of method for preparing nano carbon sol, the described method includes：
The system for including anode, cathode and electrolyte aqueous solution is provided, wherein the anode and the cathode are natural
Graphite pressboard；
The anode and the cathode are connected so as to which the nano-sized carbon for obtaining including nano carbon particle is molten with the pulse power
Glue, the particle diameter of the nano carbon particle is 1nm to 100nm；
Wherein, the bulk density of the native graphite pressboard is 1.3g/cm3-2.8g/cm3。
In some embodiments, the bulk density of the native graphite pressboard is 1.9g/cm3-2.4g/cm3。
In some embodiments, the thickness of the native graphite pressboard is 15mm to 35mm.
In some embodiments, the thickness of the native graphite pressboard is 20mm to 30mm.
In some embodiments, the native graphite pressboard be via graphite compound powder under the pressure of >=5MPa
What compacting formed, wherein, the graphite compound powder includes natural graphite powder.
In some embodiments, the native graphite pressboard is in 5MPa to 11MPa via graphite compound powder
Compacting forms under pressure.
In some embodiments, in terms of the weight of the graphite compound powder, the content of the natural graphite powder is
99%-99.7%.
In some embodiments, the natural graphite powder is natural flake graphite powder.
In some embodiments, the particle diameter of the natural graphite powder is 500-2000 mesh.
In some embodiments, the particle diameter of the natural graphite powder is 600-1000 mesh.
In some embodiments, the particle diameter of the natural graphite powder is 600-800 mesh.
In some embodiments, the purity of the natural graphite powder is >=80%.
In some embodiments, the graphite compound powder further includes graphite powder binding agent.
In some embodiments, the graphite powder binding agent for graphite conductive adhesive and water mixture, and when mixing
The volume ratio of the graphite conductive adhesive and the water is 1:3-1:8.
In some embodiments, the graphite powder binding agent for graphite conductive adhesive and water mixture, and when mixing
The volume ratio of graphite conductive adhesive and water is 1:4-1:6.
In some embodiments, the method further includes the step of drying after compacting.
In some embodiments, the system further includes at least one piece of partition plate, and the partition plate is the native graphite pressure
Making sheet, the anode, the partition plate and the cathode are equidistantly arranged in parallel.
In some embodiments, the content of electrolyte is the electrolyte aqueous solution gross weight in the electrolyte aqueous solution
The 0.05% to 0.07% of amount.
In some embodiments, the electrolyte aqueous solution is to include selected from by sodium chloride, sodium nitrate, sodium bromide, sulphur
The aqueous solution of the electrolyte of the group of sour sodium and combinations thereof composition.
In some embodiments, the effective voltage of the pulse power is 60V to 110V, and effective current is 3A to 6A.
In some embodiments, the anode and the cathode continue 70 with the time that the pulse power is connected and arrive
170 it is small when.
In some embodiments, the content of nano carbon particle described in the nano carbon sol is 0.1 weight %-0.5
Weight %.
In some embodiments, the content of nano carbon particle described in the nano carbon sol is 0.3 weight % to 0.5
Weight %.
In some embodiments, the content of nano carbon particle described in the nano carbon sol is 0.4 weight % to 0.5
Weight %.
In some embodiments, the particle diameter of the nano carbon particle is 30nm to 90nm.
In some embodiments, the particle diameter of the nano carbon particle is 50nm to 80nm.
In some embodiments, the pH value of the nano carbon sol is 2.5-7.
In some embodiments, the pH value of the nano carbon sol is 4-6.
In some embodiments, the pH value of the nano carbon sol is 4-5.5.
The bulk density of the native graphite pressboard of the present invention is 1.3g/cm3-2.8g/cm3.Preferably, institute in the present invention
The bulk density for stating native graphite pressboard is 1.9g/cm3-2.4g/cm3。
The native graphite pressboard of the present invention can compacting be formed under the pressure of >=5MPa via graphite compound powder.
If pressure is bigger, cost is higher；If pressure is too small, the compressing of native graphite pressboard will be unfavorable for.Therefore, originally
The native graphite pressboard of invention is preferably to suppress to form under the pressure of 5MPa to 11MPa via graphite compound powder.
The particle diameter of the natural graphite powder of the present invention is 500-2000 mesh.If the particle diameter of graphite powder is too big, day will be unfavorable for
So graphite pressboard is compressing；If the particle diameter of graphite powder is too small, cost can be caused too high.Therefore, day of the invention
The particle diameter of right graphite powder is preferably 600-1000 mesh.It is further preferred that the particle diameter of natural graphite powder is 600-800 mesh.
During nano carbon sol is prepared, voltage is higher, and the energy that graphitic carbon obtains on the electrode is bigger, therefore,
Be possible to more carbon atoms leave at the same time electrode formed swash from carbon particle, but the particle diameter of nano carbon particle formed will increase
Greatly.Therefore, voltage is the important parameter for controlling nano carbon particle size.And the size of current in electrolytic process then with nano-sized carbon
The yield of grain is closely related, and electric current is bigger, and yield is higher.
Research shows, impulse method of the present invention prepares the effective voltages of nano carbon sol system needs as 60V extremely
110V, by adjusting the concentration of electrolyte in electrolyte aqueous solution, can be adjusted the resistance of system, thus, it is possible to will
Effective current between pole plate is controlled in 3A to 6A.Voltage can determine that particle diameter is got over according to the particle diameter of required nano carbon particle
Greatly, voltage is also bigger, otherwise smaller.
The method choice electrolyte solution of the present invention, is on the one hand to make to turn between cathode and anode electrode, forms closure
Circuit, another important aspect is can to provide the anion to form nano carbon particle surface electric double layer.Due to swash to
Nano carbon particle in electrolyte solution has strong Selective adsorption, they can select the anion in electrolyte solution to inhale
It is attached, anion is assembled to nano carbon particle, at this time, nano carbon particle is in elecrtonegativity, since nano carbon particle all carries negative electricity
Property, and because the effect that like charges repel each other, make nano carbon particle mutually exclusive without reuniting, i.e. electric double layer effect, tie
Fruit causes nano carbon particle stably to exist in solution, and forms stable nano carbon sol.
In order to ensure the purity of nano carbon sol, when electrolyte solution is prepared using deionized water, in electrolyte solution
The electrolyte of addition uses strong electrolyte material, and sodium chloride, sodium nitrate, sodium bromide or sulphur can be added in electrolyte aqueous solution
Sour sodium etc..The addition of electrolyte can determine according to the required resistance being transferred to, under normal circumstances, the addition of electrolyte
For 0.05% to the 0.07% of electrolyte aqueous solution gross weight.
The content of nano carbon particle in the nano carbon sol of the present invention is 0.1 weight % to 0.5 weight %.If nanometer
The too high levels of nano carbon particle in carbon sol, then it, which is prepared, needs higher cost, and the pH value of nano carbon sol is too small, and
And nano carbon particle bad stability, it is easier to reunite, it is not easy to maintain.Therefore, described in heretofore described nano carbon sol
The content of nano carbon particle be preferably 0.3 weight % to 0.5 weight %, it is further preferred that described in the nano carbon sol
The content of nano carbon particle is 0.4 weight % to 0.5 weight %.
The particle diameter of nano carbon particle in the nano carbon sol of the present invention is 1nm to 100nm.If in nano carbon sol
The particle diameter of nano carbon particle is too low, the bad stability of nano carbon particle, easily reunites, not easy to maintain；If nano carbon particle
Particle diameter it is excessive, then it, which is prepared, needs higher cost.Therefore, nano carbon particle described in heretofore described nano carbon sol
Particle diameter be preferably 30nm to 90nm, it is further preferred that the particle diameter of nano carbon particle is described in the nano carbon sol
50nm to 80nm.
The pH value of the nano carbon sol of the present invention is 2.5-7.If the pH value of nano carbon sol is too low, nano carbon sol
It is acid excessive, need to add excessive water when in use to be diluted to suitable pH value.Therefore, heretofore described nano-sized carbon is molten
The pH value of glue is preferably 4-6, it is further preferred that the pH value of the nano carbon sol is 4-5.5.
It should be appreciated that the nano carbon sol that the present invention obtains may not need post processing, chemical fertilizer potentiating is directly applied to
The multiple fields such as agent, alkaline land improvement and remediation contaminated soil；Prior art CN104591855B can also be referred to through further
After processing obtains nano-carbon powder, applied to multiple fields such as fertilizer synergistic agents.
It can be significantly reduced into compared to the existing method for preparing nano carbon sol, method of the invention in the prior art
This, specifically, is reduced to substantially the 1/8 to 1/10 of former cost, meets production requirement, suitable for large-scale industrial production.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
The present invention may be better understood by referring to illustrating for embodiment of the present invention, in the accompanying drawings：
Fig. 1 is the schematic diagram that nano carbon sol is prepared using impulse method of the present invention；
Fig. 2 is the schematic diagram of the native graphite pressboard of the present invention.
Embodiment
In the following description, in order to reach purpose of explanation to there is a comprehensive understanding to the present invention, illustrate
Substantial amounts of detail, however, it will be apparent that to those skilled in the art, without these details can also be real
The existing present invention.In other examples, known construction and device is shown in square frame chart.In this respect, that is lifted is illustrative
Example embodiment only for explanation, the present invention is not caused to limit.Therefore, protection scope of the present invention and from above-mentioned
Specific embodiment is limited, and is only subject to the scope of appended claims.
Used each raw material below in an example, can be prepared by known method, or be passed through
Commercial sources obtain.
" graphite " is carbonaceous element crystalline mineral, its crystallization screen work is hexagon layer structure, is a kind of non-metallic material
Material, color and luster is silver grey, and matter is soft, has metallic luster.Graphite industrially has very extensive purposes.
" high purity graphite " refers to the graphite that phosphorus content is more than 99.99%.High purity graphite have high intensity, high volume density,
Many excellent properties such as high-purity, are widely used in a variety of industrial circles.At present, China has the ability to produce the enterprise of high purity graphite
Industry is few, causes cost high.
" native graphite " refer to the graphite that nature naturally occurs, generally with grapholite, graphite-gneiss, graphitiferous
The ore such as schist and rotten shale occurs.Native graphite is divided into Scaly graphite (crystalline flake graphite) and cryptocrystalline according to its crystal habit
Two kinds of industrial types of graphite (amorphous graphite).Native graphite is best with blocky graphite and crystalline flake graphite, and purposes is most wide.China does not have also
Large-scale blocky graphite mineral deposit is found, crystalline flake graphite and aphanitic graphite have compared with large ore deposit, and form and open on a large scale
The base adopted.
" crystalline flake graphite " refers to that graphite crystal is in flakey, this is to go bad to form under the pressure of high intensity, there is big squama
Point of piece and thin scale.The characteristics of crystalline flake graphite ore is that grade is not high, generally between 2~3%, or 100~25%.Scale
Graphite is one of ore that floatability is best in nature, and high grade graphite concentrate can be obtained through excessive mill multiselect.Crystalline flake graphite
Floatability, lubricity, plasticity are more superior than other types graphite, therefore its industrial value is maximum.
" graphite powder " refers to the powder for having metallic luster and opaque finely squamose of the Dark grey obtained by machining graphite
Last shape solid.After the deep processings such as " natural graphite powder " refers to exploit by graphite ore, flotation, drying, subhead, purification, crushing
Product." natural flake graphite powder " refer to for natural flake graphite by ore extraction, flotation, drying, subhead, purification,
Product after the deep processings such as crushing.
" conducting resinl " refer to it is a kind of cured and dry after can effectively be bonded a variety of materials but also
Special adhesive." graphite conductive adhesive " refers to be used as conducting resinl prepared by conductive additive by the use of graphite.
" native graphite pressboard " refers to pass through the graphite powder binding agent including graphite conductive adhesive and water and natural graphite powder
After crossing kneading, the graphite cake with certain specification formed is suppressed under certain pressure.
" colloidal sol " refers to that the diameter of colloidal solid is 1-100nm, and the dispersed phase particles of a diameter of 1-100nm are equal
The even dispersate being distributed in decentralized medium.According to the difference of decentralized medium, solid sols, lyosol or aerosol can be divided into.This
Signified colloidal sol generally refers to lyosol in invention, and lyosol refers to the nanometer or micron of the organic or inorganic formed in a solvent
The particle of level.These particles usually carry electric charge, and due to charge effect, adsorb one layer of solvent molecule, formed and coated by solvent
Nanometer or micro particles, i.e. colloidal particle, these colloidal particles are due to mutually exclusive with electric charge, so as to suspension
State is present in solvent, that is, forms colloidal sol.
" nano carbon sol " is a type of nano-carbon material.Nano-carbon material refers to that dispersed phase scale is at least one-dimensional
Carbon material less than 100nm.Dispersed phase can be both made of carbon atom, can also be made of xenogenesis atom (non-carbon), very
It extremely can be nano-pore.Nano carbon sol prepared by the present invention has excellent environmental stability, stores three at normal temperatures and pressures
Year does not reunite.
By using impulse method, nano carbon sol can be prepared, its principle is as shown in Figure 1.Wherein, native graphite is suppressed
Anode 1, cathode 2 and partition plate 6 is made in plate (wherein, partition plate 6 is optional).The size of anode 1 and cathode 2 is according to preparation vessel 3
Depending on size, general electrode has a certain distance from preparation vessel 3, such as retains the space of 15mm to 20mm.Under normal circumstances, anode
1 is identical with the size of cathode 2, and the thickness of native graphite pressboard can be 15mm to 35mm, preferably 20mm to 30mm.By electrode
It is placed in preparation vessel 3, there is electrolyte aqueous solution 4 in preparation vessel 3, anode 1 and cathode 2 is connected respectively to the positive and negative of the pulse power 5
On end.When including partition plate 6 in preparation system, partition plate 6 is placed between cathode 2 and anode 1, with the distance of the two substantially phase
Deng partition plate does not hinder the fluid communication of electrolyte solution.Partition plate 6 is used so that electrolysis system economize on electricity about 30%.By pulse
Power supply 5 is loaded in the load being made of anode 1, cathode 2 and electrolyte aqueous solution 4, molten so as to obtain nano-sized carbon
Glue.The pulse power 5 uses pulse generating unit well known in the prior art, and effective voltage is 60V to 110V, effective current 3A
To 6A, time that the pulse power 5 and anode 1 and cathode 2 connect continue 70-170 it is small when.Short-circuit in order to prevent, preparation vessel 3 uses
Insulating materials is made, the size of preparation vessel 3, can be determined according to the size of electrode, and the beginning of preparation vessel 3 is rectangle.Anode graphite
Electrode 1 obtains energy under the action of alternating pulsing current, when the energy that the part carbon atom on graphite electrode 1 obtains reaches foot
During overcoming graphite carbon atom Interaction Force, swash from into electrolyte.The present invention is received by scanning electron microscopy measurement
The particle diameter of nano carbon particle in rice carbon sol, records the median particle diameter of nano carbon particle.The present invention is received by colorimetric method for determining
The content of nano carbon particle in rice carbon sol.
As shown in Fig. 2, the length of the native graphite plate is a, width is b and thickness is T.In general, the native graphite plate
Length be 300mm, width is 300mm and thickness T is 15mm to 35mm, preferably 20mm to 30mm.The native graphite of the present invention
The bulk density of pressboard is the ratio of its quality and its volume.
For the ease of expression, projects in embodiment to write a Chinese character in simplified form code name as follows：
The particle diameter of D (mesh) natural graphite powder
The purity of A (%) natural graphite powder
The content of natural graphite powder in B (%) graphite compound powder
The volume ratio of V graphite conductive adhesives and water
Pressure used by P (MPa) is suppressed
The thickness of T (mm) native graphite pressboard
ρ(g/cm3) native graphite pressboard density
Embodiment 1
The present embodiment selects commercially available natural flake graphite powder (vast pyroxene ink Co., Ltd of Shenzhen) and graphite-filled type
Conductive inorganic (Dongguan City Yi Kunjiao industry Co., Ltd, model：YK-1177), wherein, the particle diameter of the natural flake graphite powder is
D, purity A, content B.The graphite-filled type conductive inorganic is mixed with water with the volume ratio of V, by the mixture
Add in natural flake graphite powder and carry out kneading, then the mixture that kneading obtains is suppressed with home-made contrivance, suppress institute
The pressure used finally obtains the native graphite pressboard that thickness is T for P, and the planar dimension of the wherein mould of home-made contrivance is
300mm×300mm。
Be prepared respectively according to the method described above (1-1)-(1-6) group native graphite pressboard, wherein, preparation parameter and
Its thickness is as shown in table 1 below：
The preparation parameter and its thickness of 1 native graphite pressboard of table
| Numbering | D (mesh) | A (%) | B (%) | V | P(MPa) | T(mm) | ρ(g/cm3) |
| (1-1) | 500 | 80 | 99.7 | 1:3 | 5 | 35 | 1.3 |
| (1-2) | 600 | 84 | 99.6 | 1:4 | 7 | 30 | 1.6 |
| (1-3) | 800 | 88 | 99.3 | 1:5 | 8 | 28 | 1.8 |
| (1-4) | 1000 | 90 | 99.2 | 1:6 | 9 | 25 | 2.0 |
| (1-5) | 1500 | 92 | 99 | 1:7 | 10 | 20 | 2.4 |
| (1-6) | 2000 | 94 | 99.5 | 1:8 | 11 | 15 | 2.8 |
Embodiment 2
The native graphite pressboard of 3 pieces of groups (1-1) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 30mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium chloride is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 60V,
The electric current of system is 3A.
Load pulses voltage 3 days, obtains nano carbon sol, and the content of nano carbon particle is 0.1 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 2nm, and the pH of nano carbon sol is 6.
Embodiment 3
The native graphite pressboard of 3 pieces of groups (1-2) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 40mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium nitrate is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 67V,
The electric current of system is 3.4A.
Load pulses voltage 5 days, obtains nano carbon sol, and the content of nano carbon particle is 0.2 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 10nm, and the pH of nano carbon sol is 5.5.
Embodiment 4
The native graphite pressboard of 3 pieces of groups (1-3) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 50mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium bromide is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 82V,
The electric current of system is 3.9A.
Load pulses voltage 5 days, obtains nano carbon sol, and the content of nano carbon particle is 0.3 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 30nm, and the pH of nano carbon sol is 5.
Embodiment 5
The native graphite pressboard of 3 pieces of groups (1-4) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 60mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium chloride is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 90V,
The electric current of system is 5A.
Load pulses voltage 5 days, obtains nano carbon sol, and the content of nano carbon particle is 0.4 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 50nm, and the pH of nano carbon sol is 4.5.
Embodiment 6
The native graphite pressboard of 3 pieces of groups (1-5) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 70mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium sulphate is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 100V,
The electric current of system is 6A.
Load pulses voltage 7 days, obtains nano carbon sol, and the content of nano carbon particle is 0.5 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 80nm, and the pH of nano carbon sol is 4.
Embodiment 7
The native graphite pressboard of 3 pieces of groups (1-6) is taken to form system according to Fig. 1 respectively as anode 1, cathode 2 and partition plate 6
The distance of system, anode 1 and 2 opposite face of cathode is 70mm, partition plate 6 and anode 1,2 spaced set of cathode.The pulse power 5 has
Effect voltage is 60V to 110V.
Sodium chloride is added in deionized water, adjusts the resistance of solution so that when the virtual value of pulse voltage is 110V,
The electric current of system is 6A.
Load pulses voltage 7 days, obtains nano carbon sol, and the content of nano carbon particle is 0.5 weight in nano carbon sol
% is measured, the particle diameter of nano carbon particle is 100nm, and the pH of nano carbon sol is 4.
For above-described embodiment 2-7, by observation, it can be found that the nano carbon sol obtained is grey black, light beam is used
It is irradiated, can further verify that it is colloidal sol by Tyndall effect, the nano carbon sol of gained is shady and cool in room temperature
Place preserves more than 3 years (having been obtained from the time since test) and lamination does not occur.
Although having had been described above with detailed description several exemplaries, disclosed embodiment is only
It is exemplary and nonrestrictive, and those skilled in the art will readily appreciate that, it is a lot of other in an exemplary embodiment
Modification, change and/or replacement are possible, and the novel teachings and advantage of the disclosure are deviateed without essence.Therefore, it is all these
Modification, change and/or replacement are intended to be included in the scope of the present disclosure limited such as the appended claims.
Claims (21)
1. a kind of method for preparing nano carbon sol, the described method includes：
The system for including anode, cathode and electrolyte aqueous solution is provided, wherein the anode and the cathode are native graphite
Pressboard；
The anode and the cathode are connected so as to obtain the nano carbon sol for including nano carbon particle, institute with the pulse power
The particle diameter for stating nano carbon particle is 1nm to 100nm；
Wherein, the bulk density of the native graphite pressboard is 1.3g/cm3-2.8g/cm3。
2. the method for claim 1, wherein the bulk density of the native graphite pressboard is 1.9g/cm3-2.4g/
cm3。
3. the method for claim 1, wherein the thickness of the native graphite pressboard is 15mm to 35mm.
4. the method for claim 1, wherein the native graphite pressboard is in >=5MPa via graphite compound powder
Pressure under compacting form, wherein, the graphite compound powder includes natural graphite powder.
5. method as claimed in claim 4, wherein, in terms of the weight of the graphite compound powder, the natural graphite powder
Content is 99%-99.7%.
6. method as claimed in claim 4, wherein, the natural graphite powder is natural flake graphite powder.
7. method as claimed in claim 4, wherein, the particle diameter of the natural graphite powder is 500-2000 mesh.
8. the method for claim 7, wherein, the particle diameter of the natural graphite powder is 600-1000 mesh.
9. method as claimed in claim 8, wherein, the particle diameter of the natural graphite powder is 600-800 mesh.
10. method as claimed in claim 4, wherein, the purity of the natural graphite powder is >=80%.
11. method as claimed in claim 4, wherein, the graphite compound powder further includes graphite powder binding agent.
12. method as claimed in claim 11, wherein, the graphite powder binding agent is the mixture of graphite conductive adhesive and water,
And the volume ratio of the graphite conductive adhesive and the water is 1 when mixing:3-1:8.
13. method as claimed in claim 4, further includes the step of drying after compacting.
14. the method for claim 1, wherein the system further includes at least one piece of partition plate, the partition plate is the day
Right graphite pressboard, the anode, the partition plate and the cathode are equidistantly arranged in parallel.
15. the method for claim 1, wherein the content of electrolyte is the electrolyte in the electrolyte aqueous solution
The 0.05% to 0.07% of aqueous solution gross weight.
16. the method for claim 1, wherein the electrolyte aqueous solution be include selected from by sodium chloride, sodium nitrate,
The aqueous solution of the electrolyte of the group of sodium bromide, sodium sulphate and combinations thereof composition.
17. the method for claim 1, wherein the effective voltage of the pulse power is 60V to 110V, effective current
For 3A to 6A.
18. the time that the method for claim 1, wherein anode and the cathode are connected with the pulse power
Continue 70 to 170 it is small when.
19. the method for claim 1, wherein the content of nano carbon particle described in the nano carbon sol is 0.1 weight
Measure %-0.5 weight %.
20. the method for claim 1, wherein the particle diameter of the nano carbon particle is 30nm to 90nm.
21. the method for claim 1, wherein the pH value of the nano carbon sol is 2.5-7.
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| CN201711146732.1A CN107904612A (en) | 2017-11-17 | 2017-11-17 | A kind of method that nano carbon sol is prepared with native graphite |
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| CN108675897A (en) * | 2018-07-05 | 2018-10-19 | 沈阳美华农业有限公司 | A kind of nano carbon sol and preparation method thereof and organic-inorganic mixed fertilizer |
| CN110306198A (en) * | 2019-08-05 | 2019-10-08 | 柏鸣 | A kind of preparation method of nano carbon colloidal sol |
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| CN110306198A (en) * | 2019-08-05 | 2019-10-08 | 柏鸣 | A kind of preparation method of nano carbon colloidal sol |
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