CN114804086B - Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method - Google Patents
Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method Download PDFInfo
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 238000004146 energy storage Methods 0.000 claims abstract description 25
- 229910052786 argon Inorganic materials 0.000 claims abstract description 15
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Classifications
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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
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
Abstract
The invention discloses a device and a method for continuously preparing graphene by a powder carrying constraint electric explosion method. The powder carrying belt (3) waiting for the electric explosion method is stopped between the grounding electrode (7) and the high-voltage electrode (10); and charging voltage into the energy storage capacitor C, introducing high current into the graphite powder (12) and exploding, and directionally spraying an explosion product obtained by explosion into an argon medium through an explosion nozzle (5) to form graphene aerosol. The invention solves the problem that the powder cannot explode because of loosening and being incapable of being linearly spread on the material carrying rod, avoids the introduction of impurity elements after explosion, prolongs the service life and can better restrict energy accumulation.
Description
Technical Field
The invention relates to a device and a method for continuously preparing graphene by using a powder-carrying constraint electric explosion method, and belongs to the technical field of electric explosion powder making devices.
Background
Graphene has received extensive attention in many research fields due to its unique mechanical and electrical properties; the composite material has excellent effect in the fields of super capacitor and secondary battery as new energy source material, various film materials for heat dissipation, corrosion prevention, heating, sea water desalination and wave absorption, and composite material of polymer, metal, ceramic and graphene, and has excellent scale application prospect.
The graphene used in the fields is usually powder, the using amount is large in industrialized application, various improved Hummers methods are adopted for preparation, firstly, the strong oxidant is used for oxidizing and intercalating graphite, and the atomic distance is increased; peeling to obtain graphene oxide by stirring or ultrasonic treatment; and then the reducing agent is used to obtain the reduced graphene oxide. The method has the advantage of high-efficiency large-scale production, but the physical and chemical characteristics of the graphene produced by the method have larger dispersity, the content of impurity elements is higher, and a large amount of waste liquid is generated in the process.
Various research fields clearly recognize that developing graphene preparation methods and processes with low cost, green and large-scale and high-quality fine structure regulation and control becomes a key core problem of graphene technology development. Mechanical exfoliation is an original and promising green method for preparing graphene, and utilizes mechanical energy to overcome van der Waals interactions between graphene layers, resulting in high quality graphene sheets with good conductivity. Graphite is generally mixed with a solvent, energy is input by methods such as ultrasonic waves, stirring, ball milling and the like, and gradual crushing and stripping of graphite particles are realized by means of mutual collision of graphite particles and interaction between the wall and a solution. However, when the mass of the exfoliated graphite platelets is reduced to some extent, the kinetic energy of impact thereof is gradually reduced, and further exfoliation of the graphite platelets becomes increasingly difficult. In these resulting graphite products, the graphene fraction actually contained is very small.
The method for preparing the graphene by using the electric explosion method is a novel method for producing the graphene by mechanical stripping. Feeding a graphite raw material into an explosion confinement chamber; and two discharge electrodes connected with the pulse energy storage capacitor are used for introducing high current into the graphite raw material through a gas discharge mode so as to heat the graphite raw material and cause explosion. The explosion products of the graphite are subjected to a high-temperature and high-pressure process in a constraint channel, and then are ejected from a nozzle along with a shock wave, and the graphite is peeled or crushed into graphene under the actions of the high pressure, the high temperature and the shock wave. And the sprayed graphene is uniformly suspended in a protective atmosphere to form aerosol. The graphene aerosol with a certain concentration can be directly used for preparing graphene/metal matrix composite materials and graphene films and mixing with powder or liquid by controlling the frequency or the frequency of electric explosion.
At present, in the aspect of preparing graphene by a constraint electric explosion method, a device for preparing nano carbon by continuously constraining electric explosion graphite in a mode of feeding by a powder feeder is available, the device adopts an electric telescopic rod to reciprocate to drive a constraint sleeve to move together, in the process, the powder feeder spreads powder in a linear shape in a material carrying rod, but the self-made powder feeder of the device cannot ensure that the powder is spread in a linear shape on the material carrying rod and is loose, the detonation requirement cannot be met during explosion, and the productivity is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a device and a method for continuously preparing graphene by using a powder-carrying constraint electric explosion method, which solve the problem that powder cannot be exploded because the powder is loose and cannot be linearly spread on a material-carrying rod, avoid the introduction of impurity elements after explosion, prolong the service life and better constrain energy collection.
In order to achieve the aim, the invention provides a device for continuously preparing graphene by using a powder carrying constraint electric explosion method, which comprises a powder carrying belt, a driving mechanism for driving the powder carrying belt to rotate, an explosion mechanism for implementing the electric explosion method on the powder carrying belt, a powder carrying belt for carrying graphite powder and a composite explosion tube for constraining explosion energy generated by the electric explosion method, wherein the composite explosion tube is fixedly arranged in the explosion mechanism, the powder carrying belt passes through the composite explosion tube, the driving mechanism, the explosion mechanism, the powder carrying belt and the composite explosion tube are all placed in an argon medium, and the graphite powder is loaded on the powder carrying belt.
Preferentially, the explosion mechanism comprises an energy storage capacitor C, a grounding conductive tube and a high-voltage conductive tube, wherein the high-voltage conductive tube is connected with the negative electrode of the energy storage capacitor C, the grounding conductive tube is connected with the positive electrode of the energy storage capacitor C, the left end of the high-voltage conductive tube stretches into the grounding conductive tube, and an explosion nozzle is arranged at the left end of the grounding conductive tube.
Preferentially, the composite explosion tube comprises a grounding electrode, a polyethylene explosion tube, a connecting tube and a high-voltage electrode, wherein the grounding electrode is fixedly arranged in the left end of the grounding conductive tube, the grounding conductive tube is sleeved on the polyethylene explosion tube, the high-voltage electrode is fixedly arranged in the right end of the polyethylene explosion tube, the connecting tube is fixedly arranged in the polyethylene explosion tube, the high-voltage electrode is positioned between the connecting tube and the high-voltage conductive tube, the left end of the high-voltage conductive tube extends into the polyethylene explosion tube to be contacted with the right end of the high-voltage electrode, and a powder carrying belt through hole matched with a powder carrying belt is formed in the high-voltage electrode and used for restraining explosion energy and protecting the polyethylene explosion tube;
the powder carrying belt sequentially passes through the high-voltage conductive tube, the high-voltage electrode, the polyethylene explosion tube and the grounding electrode from right to left;
and the ground electrode and the polyethylene explosion tube are respectively provided with an explosion through hole matched with an explosion nozzle, the explosion through holes are communicated with the explosion nozzle, voltage is charged into the energy storage capacitor C, large current is led into graphite powder between the ground electrode and the high-voltage electrode, explosion occurs, and an explosion product obtained by explosion is directionally sprayed into an argon medium through the explosion nozzle to form graphene aerosol.
Preferentially, the driving mechanism comprises a pressing wheel, a driving wheel and a carrying wheel, the driving mechanism is positioned at the left side of the explosion mechanism, the pressing wheel and the driving wheel are fixedly arranged at two sides of the powder carrying belt, and the pressing wheel is used for pressing the powder carrying belt on the driving wheel and driving the powder carrying belt to rotate;
the powder carrying belt wheel is fixedly arranged on the right side of the explosion mechanism, and the right end of the powder carrying belt is wound on the powder carrying belt wheel;
when the electric explosion device works, the driving wheel drives the powder carrying belt waiting for the electric explosion method to move leftwards, the powder carrying wheel is pulled to rotate, the driving wheel stops rotating after the powder carrying belt moves by fixed displacement, the powder carrying belt waiting for the electric explosion method finally stops between the grounding electrode and the high-voltage electrode, and the electric explosion method is implemented on the graphite powder loaded by the powder carrying belt;
after the implementation of the electric explosion method is finished, the driving wheel drives the powder carrying belt to move leftwards continuously, and drives the next section of powder carrying belt waiting for the electric explosion method to stop between the grounding electrode and the high-voltage electrode.
Preferably, the ground electrode and the high-voltage electrode are made of graphite.
The method for continuously preparing graphene by using the powder-carrying constrained electric explosion method adopts the device described in any one of the above steps:
the driving wheel drives the powder carrying belt waiting for the electric explosion method to move leftwards;
after the powder carrying belt is taken away by the fixed displacement, the driving wheel stops rotating;
the powder carrying belt waiting for the electric explosion method is stopped between the grounding electrode and the high-voltage electrode;
charging voltage into the energy storage capacitor C, introducing large current into graphite powder between the grounding electrode and the high-voltage electrode, and exploding, wherein an explosion product obtained by explosion is directionally sprayed into an argon medium through an explosion nozzle to form graphene aerosol;
after the implementation of the electric explosion method is finished, the driving wheel drives the powder carrying belt to continuously move leftwards, and drives the next section of powder carrying belt waiting for the electric explosion method to stop between the grounding electrode and the high-voltage electrode;
repeating the steps until the electric explosion method is completed by implementing all the graphite powder loaded with the powder.
The invention has the beneficial effects that:
according to the powder carrying belt filled with compact graphite powder, the problem that the powder cannot explode on the material carrying belt due to loosening and incapability of linearly spreading is solved, the high-density polyethylene belt is used for carrying the graphite powder, so that the constraint on the graphite powder is stronger, and the stability of continuous electric explosion feeding of the graphite powder is greatly improved; the two electrodes of the grounding electrode and the high-voltage electrode are made of graphite blocks, so that the introduction of impurity elements after explosion is avoided; the concentric connecting pipe is added into the polyethylene explosion pipe, so that the service life is prolonged, energy accumulation can be well restrained, graphite powder can be well peeled into graphene, and the device provides industrialized conditions for preparing the graphene.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a schematic view of a cross section of a powder carrier tape according to the present invention.
Reference numeral 1, pinch roller, 2, action wheel, 3, powder carrying belt, 4, leading wheel, 5, explosion nozzle, 6, grounding conductive pipe, 7, grounding electrode, 8, polyethylene explosion pipe, 9, connecting pipe, 10, high voltage electrode, 11, high voltage conductive pipe, 12, graphite powder, 13.
Detailed Description
The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, if there is a directional indication (such as up, down, left, right, front, rear.
Example 1
The utility model provides a take and carry powder constraint electric explosion method continuous preparation graphite alkene device, including carrying powder area, be used for taking the pivoted actuating mechanism of powder area, be used for carrying out the explosion mechanism of electric explosion method to carrying powder area, be used for carrying the powder area 3 of graphite powder 12 and be used for restraining the compound blast pipe of explosion energy that the electric explosion method produced, compound blast pipe fixed mounting is inside the explosion mechanism, carry powder area 3 to pass compound blast pipe, actuating mechanism, explosion mechanism, carry powder area 3 and compound blast pipe all place in the argon gas medium, carry powder area 3 and load graphite powder 12.
Preferentially, the explosion mechanism comprises an energy storage capacitor C, a grounding conductive tube 6 and a high-voltage conductive tube 11, the high-voltage conductive tube 11 is connected with the negative electrode of the energy storage capacitor C, the grounding conductive tube 6 is connected with the positive electrode of the energy storage capacitor C, the left end of the high-voltage conductive tube 11 stretches into the grounding conductive tube 6, and an explosion nozzle 5 is arranged at the left end of the grounding conductive tube 6.
Preferentially, the composite explosion tube comprises a grounding electrode 7, a polyethylene explosion tube 8, a connecting tube 9 and a high-voltage electrode 10, wherein the grounding electrode 7 is fixedly arranged inside the left end of the grounding conductive tube 6, the grounding conductive tube 6 is sleeved on the polyethylene explosion tube 8, the high-voltage electrode 10 is fixedly arranged inside the right end of the polyethylene explosion tube 8, the connecting tube 9 is fixedly arranged in the polyethylene explosion tube 8, the high-voltage electrode 10 is positioned between the connecting tube 9 and the high-voltage conductive tube 11, the left end of the high-voltage conductive tube 11 stretches into the polyethylene explosion tube 8 to be contacted with the right end of the high-voltage electrode 10, and a powder carrying belt through hole matched with the powder carrying belt 3 is formed in the high-voltage electrode 10 and used for restraining explosion energy and protecting the polyethylene explosion tube 8;
the powder carrying belt 3 sequentially passes through the high-voltage conductive tube 11, the high-voltage electrode 10, the polyethylene explosion tube 8 and the grounding electrode 7 from right to left;
the ground electrode 7 and the polyethylene explosion tube 8 are respectively provided with an explosion through hole matched with the explosion nozzle 5, the explosion through holes are communicated with the explosion nozzle 5, voltage is charged into the energy storage capacitor C, high current is led into the graphite powder 12 between the ground electrode 7 and the high-voltage electrode 10, explosion occurs, and an explosion product obtained by the explosion is directionally sprayed into an argon medium through the explosion nozzle 5 to form graphene aerosol.
Preferentially, the driving mechanism comprises a pressing wheel 1, a driving wheel 2 and a carrying wheel 13, the driving mechanism is positioned at the left side of the explosion mechanism, the pressing wheel 1 and the driving wheel 2 are fixedly arranged at two sides of the powder carrying belt 3, and the pressing wheel 1 presses the powder carrying belt 3 on the driving wheel 2 for driving the powder carrying belt 3 to rotate;
the carrying wheel 13 is fixedly arranged on the right side of the explosion mechanism, and the right end of the powder carrying belt 3 is wound on the carrying wheel 13;
when the electric explosion device works, the driving wheel 2 drives the powder carrying belt 3 waiting for the electric explosion method to move leftwards, the driving wheel 13 is pulled to rotate, the driving wheel 2 stops rotating after the powder carrying belt 3 moves through fixed displacement, the powder carrying belt 3 waiting for the electric explosion method finally stops between the grounding electrode 7 and the high-voltage electrode 10, and the electric explosion method is implemented on graphite powder 12 loaded on the powder carrying belt 3;
after the implementation of the electric explosion method is finished, the driving wheel 2 drives the powder carrying belt 3 to move leftwards continuously, and drives the next section of powder carrying belt 3 waiting for the electric explosion method to stop between the grounding electrode 7 and the high-voltage electrode 10.
Preferably, the ground electrode 7 and the high-voltage electrode 10 are made of graphite.
The method for continuously preparing graphene by using the powder-carrying constrained electric explosion method adopts the device described in any one of the above steps:
the driving wheel 2 drives the powder carrying belt 3 waiting for the electric explosion method to move leftwards;
after the powder carrying belt 3 moves through the fixed displacement, the driving wheel 2 stops rotating;
the powder carrying belt 3 waiting for the electric explosion method is stopped between the grounding electrode 7 and the high-voltage electrode 10;
charging voltage into the energy storage capacitor C, introducing large current into the graphite powder 12 between the grounding electrode 7 and the high-voltage electrode 10, and exploding, wherein an explosion product obtained by explosion is directionally sprayed into an argon medium through the explosion nozzle 5 to form graphene aerosol;
after the implementation of the electric explosion method is finished, the driving wheel 2 drives the powder carrying belt 3 to continuously move leftwards, and drives the next section of powder carrying belt 3 waiting for the electric explosion method to stop between the grounding electrode 7 and the high-voltage electrode 10;
repeating the steps until all the graphite powder 12 loaded by the powder carrying belt 3 is subjected to the electric explosion method.
The grounding conductive tube 6 and the high-voltage conductive tube 11 are cylindrical, the axle center of the high-voltage conductive tube 11 is provided with a powder carrying belt through hole matched with the powder carrying belt 3, the polyethylene explosion tube 8 and the connecting tube 9 are cylindrical pipe fittings,
the above components of the pinch roller 1, the driving wheel 2, the energy storage capacitor C, the ground electrode 7, the high-voltage electrode 10 and the carrier wheel 13 can be of various types in the prior art, and a person skilled in the art can select a proper type according to actual requirements, so that this embodiment is not illustrated one by one.
Example two
The invention comprises a driving mechanism, an explosion mechanism, a powder carrying belt and a composite explosion tube, wherein the driving mechanism, the explosion mechanism, the powder carrying belt and the composite explosion tube are all placed in an argon medium;
as shown in fig. 1 and fig. 2, the driving mechanism comprises a pressing wheel 1, a driving wheel 2, a powder carrying belt 3, a guide wheel 4 and a carrying wheel 13, after the driving wheel 2 is started to rotate, the pressing wheel 1 presses the powder carrying belt 3 on the driving wheel 2, the powder carrying belt 3 is driven to start to pull forwards under the action of pressure, then the carrying wheel 13 is pulled to rotate, the driving wheel 2 stops rotating after the powder carrying belt 3 passes through the polyethylene explosion tube 8 to advance through a fixed displacement, and the continuous electric explosion is realized by continuing the process after one explosion is completed. The guide wheel is fixedly arranged on the lower side of the powder carrying belt, is positioned above the driving wheel and is used for adjusting the conveying direction of the left end of the powder carrying belt;
as shown in fig. 1 and 2, the explosion mechanism comprises a grounding conductive tube 6, a grounding electrode 7, a polyethylene explosion tube 8, a connecting tube 9, a high-voltage electrode 10 and a high-voltage conductive tube 11, 10-14kV voltage is charged into an energy storage capacitor C in an argon medium with certain air pressure, a powder carrying belt 3 sends graphite powder 12 between the grounding electrode 7 and the high-voltage electrode 10, after the energy storage capacitor C is connected, pulse high current is conducted to the two electrodes of the grounding electrode 7 and the high-voltage electrode 10, the graphite powder is exploded under the action of the high current, and as the composite tube consisting of the polyethylene explosion tube 8, the grounding electrode 7 and the high-voltage electrode 10 only has an explosion nozzle 5 which is opened in a large area, explosion products are sprayed outwards through the explosion nozzle 5, and graphene aerosol is formed in the argon medium after spraying.
As shown in fig. 1 and 2, the composite explosion tube comprises a grounding electrode 7, a polyethylene explosion tube 8, a connecting tube 9 and a high-voltage electrode 10, wherein the connecting tube 9 is added into the polyethylene explosion tube 8 in a concentric circle mode, the grounding electrode 7 and the high-voltage electrode 10 are distributed at two ends of the connecting tube 9, the grounding electrode 7 and the high-voltage electrode 10 form the composite explosion tube, the composite explosion tube is arranged between the grounding conductive tube 6 and the high-voltage conductive tube 11, an opening in the middle of the high-voltage electrode 10 can only pass through a powder loading belt 3, the opening area in the middle of the high-voltage electrode 10 can be ignored relative to an explosion nozzle 5, a product after explosion is sprayed outwards through the explosion nozzle 5, and graphene aerosol is formed in an argon medium after spraying;
the centers of the ground electrode 7 and the polyethylene explosion tube 8 are respectively provided with a through hole with the diameter of 4mm, one end of the composite explosion tube formed by the two holes is closed, one end of the composite explosion tube is open, and after explosion, explosion products are sprayed out through the explosion nozzle 5 at one end.
The high-voltage conductive tube 11 is connected with the negative electrode of the energy storage capacitor C, one end of the high-voltage conductive tube 11 extends into the polyethylene explosion tube 8 to be in contact with the high-voltage electrode 10, one end of the grounding conductive tube 6 is connected with the positive electrode of the energy storage capacitor C, the explosion nozzle 5 is arranged at the other end of the grounding conductive tube 6, and the grounding electrode 7 is arranged in the other end of the grounding conductive tube 6; the graphite powder 12 is compacted on the powder carrying belt 3, the driving mechanism continuously feeds the powder carrying belt 3 into the polyethylene explosion tube 8, and the powder carrying belt to be subjected to the electric explosion method is stopped between the grounding electrode 7 and the high-voltage electrode 10.
The graphite powder 12 is compacted on the high-density polyethylene powder carrying belt 3, the polyethylene powder carrying belt 3 has a simple structure, the graphite powder can be well and continuously fed, the feeding mode is simplified, the powder carrying belt 3 filled with the graphite powder penetrates from the high-voltage conductive tube 11, passes through the composite explosion tube and then passes through the grounded conductive tube 6, bypasses the guide wheel 4 and then passes out, the continuous feeding of the graphite powder is realized, and the continuous electric explosion powder preparation can be completed.
The composite explosion tube is characterized in that a connecting tube 9 is added into a polyethylene explosion tube 8 in a concentric manner, the length of the connecting tube 9 is 70+/-2 mm, explosion through holes with the diameter of 4mm are formed in the connecting tube 9 and a grounding electrode 7, a central hole of a high-voltage electrode 10 can only pass through a powder loading belt 3, and the composite explosion tube has longer service life and is replaceable during continuous electric explosion.
The grounding electrode 7 and the high-voltage electrode 10 are made of graphite, and the powder cannot introduce impurity elements after explosion.
Because the energy of explosion is higher, the polyethylene explosion tube 8 can burst, and all the energy can not be used for stripping graphite powder, the composite explosion tube is added into the polyethylene explosion tube 8, and comprises a concentric connecting tube 9, so that the explosion energy is better restrained; the graphite powder 12 is fed between the ground electrode 7 and the high-voltage electrode 10 by a driving mechanism.
The grounding conductive tube 6 and the high-voltage conductive tube 11 have a certain rigidity supporting device and good conductivity, and in the embodiment, the grounding conductive tube 6 and the high-voltage conductive tube 11 can be copper tubes or aluminum tubes.
The ground electrode 7 and the high-voltage electrode 10 are made of graphite, and the connecting pipe 9 is made of stainless steel.
The specific implementation process of the embodiment is as follows:
the method comprises the steps of winding a powder carrying belt 3 filled with graphite powder 12 on a carrying wheel 13, placing the device of the invention in an argon medium with certain air pressure, starting a driving wheel 2, starting rotation of the driving wheel 2, pulling the powder carrying belt 3 to convey the graphite powder 12 between a grounding electrode 7 and a high-voltage electrode 10, stopping the driving wheel 2, then charging an energy storage capacitor C to a certain voltage within a set range of 10-14kV by a direct-current high-voltage generator H.V, introducing energy in the energy storage capacitor C into the graphite powder 12 after the required voltage is reached, instantaneously generating a large amount of Joule heat by the graphite powder 12 to explode, and spraying an explosion product into the argon atmosphere through an explosion nozzle 5 to form graphene aerosol, thereby completing an explosion spraying process. Then charging the energy storage capacitor C, and enabling the graphite powder 12 to be subjected to the electric explosion method in the next section to enter between the high-voltage electrode 10 and the grounding electrode 7 for explosion; the process is repeatedly executed, so that stable and continuous electric explosion powder preparation is realized.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (4)
1. The device is characterized by comprising a powder carrying belt, a driving mechanism for driving the powder carrying belt to rotate, an explosion mechanism for implementing the electric explosion method on the powder carrying belt, a powder carrying belt (3) for carrying graphite powder (12) and a composite explosion tube for restraining explosion energy generated by the electric explosion method, wherein the composite explosion tube is fixedly arranged in the explosion mechanism, the powder carrying belt (3) passes through the composite explosion tube, the driving mechanism, the explosion mechanism, the powder carrying belt (3) and the composite explosion tube are all placed in an argon medium, and the graphite powder (12) is loaded on the powder carrying belt (3);
the explosion mechanism comprises an energy storage capacitor C, a grounding conductive tube (6) and a high-voltage conductive tube (11), wherein the high-voltage conductive tube (11) is connected with the negative electrode of the energy storage capacitor C, the grounding conductive tube (6) is connected with the positive electrode of the energy storage capacitor C, the left end of the high-voltage conductive tube (11) stretches into the grounding conductive tube (6), and an explosion nozzle (5) is arranged at the left end of the grounding conductive tube (6);
the composite explosion tube comprises a grounding electrode (7), a polyethylene explosion tube (8), a connecting tube (9) and a high-voltage electrode (10), wherein the grounding electrode (7) is fixedly arranged inside the left end of the grounding conductive tube (6), the grounding conductive tube (6) is sleeved on the polyethylene explosion tube (8), the high-voltage electrode (10) is fixedly arranged inside the right end of the polyethylene explosion tube (8), the connecting tube (9) is fixedly arranged in the polyethylene explosion tube (8), the high-voltage electrode (10) is positioned between the connecting tube (9) and the high-voltage conductive tube (11), the left end of the high-voltage conductive tube (11) stretches into the polyethylene explosion tube (8) to be in contact with the right end of the high-voltage electrode (10), and a powder carrying belt through hole matched with the powder carrying belt (3) is formed in the high-voltage electrode (10) and is used for restraining explosion energy and protecting the polyethylene explosion tube (8);
the powder carrying belt (3) sequentially passes through the high-voltage conductive tube (11), the high-voltage electrode (10), the polyethylene explosion tube (8) and the grounding electrode (7) from right to left;
explosion through holes matched with the explosion nozzle (5) are formed in the grounding electrode (7) and the polyethylene explosion tube (8), the explosion through holes are communicated with the explosion nozzle (5), voltage is charged into the energy storage capacitor C, large current is led into the graphite powder (12) between the grounding electrode (7) and the high-voltage electrode (10) and explosion occurs, and explosion products obtained through explosion are directionally sprayed into an argon medium through the explosion nozzle (5) to form graphene aerosol.
2. The device for continuously preparing graphene by using the powder-carrying constraint electric explosion method according to claim 1, wherein the device is characterized in that,
the driving mechanism comprises a pressing wheel (1), a driving wheel (2) and a carrying wheel (13), the driving mechanism is positioned at the left side of the explosion mechanism, the pressing wheel (1) and the driving wheel (2) are fixedly arranged at two sides of the powder carrying belt (3), and the pressing wheel (1) is used for pressing the powder carrying belt (3) on the driving wheel (2) and driving the powder carrying belt (3) to rotate;
the carrying wheel (13) is fixedly arranged on the right side of the explosion mechanism, and the right end of the powder carrying belt (3) is wound on the carrying wheel (13);
when the electric explosion device works, the driving wheel (2) drives the powder carrying belt (3) waiting for the electric explosion method to move leftwards, the driving wheel (2) stops rotating after the powder carrying belt (3) moves through fixed displacement, the powder carrying belt (3) waiting for the electric explosion method finally stops between the grounding electrode (7) and the high-voltage electrode (10), and the electric explosion method is implemented on graphite powder (12) loaded on the powder carrying belt (3);
after the electric explosion method is implemented, the driving wheel (2) drives the powder carrying belt (3) to move leftwards continuously, and drives the next section of powder carrying belt (3) waiting for the electric explosion method to stop between the grounding electrode (7) and the high-voltage electrode (10).
3. The device for continuously preparing graphene by using the powder-carrying constraint electric explosion method according to claim 1, wherein the grounding electrode (7) and the high-voltage electrode (10) are made of graphite.
4. A method for continuously preparing graphene by using a powder-carrying constraint electric explosion method, which is characterized in that the following steps are performed by adopting the device as claimed in any one of claims 1 to 3:
the driving wheel (2) drives the powder carrying belt (3) waiting for the electric explosion method to move leftwards;
after the powder carrying belt (3) moves through fixed displacement, the driving wheel (2) stops rotating;
the powder carrying belt (3) waiting for the electric explosion method is stopped between the grounding electrode (7) and the high-voltage electrode (10);
charging voltage into the energy storage capacitor C, introducing large current into graphite powder (12) between the grounding electrode (7) and the high-voltage electrode (10) and exploding, and directionally spraying an explosion product obtained by explosion into an argon medium through an explosion nozzle (5) to form graphene aerosol;
after the implementation of the electric explosion method is finished, the driving wheel (2) drives the powder carrying belt (3) to continuously move leftwards, and drives the next section of powder carrying belt (3) waiting for the electric explosion method to stop between the grounding electrode (7) and the high-voltage electrode (10);
repeating the steps until all the graphite powder (12) loaded by the powder carrying belt (3) is subjected to the electric explosion method.
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