CN114804086A - 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
- Publication number
- CN114804086A CN114804086A CN202210448303.4A CN202210448303A CN114804086A CN 114804086 A CN114804086 A CN 114804086A CN 202210448303 A CN202210448303 A CN 202210448303A CN 114804086 A CN114804086 A CN 114804086A
- Authority
- CN
- China
- Prior art keywords
- explosion
- powder
- tube
- carrying belt
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 213
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 81
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 126
- 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
- 239000000443 aerosol Substances 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 5
- -1 polyethylene Polymers 0.000 claims description 40
- 239000004698 Polyethylene Substances 0.000 claims description 39
- 229920000573 polyethylene Polymers 0.000 claims description 39
- 230000007246 mechanism Effects 0.000 claims description 38
- 239000002131 composite material Substances 0.000 claims description 23
- 229910002804 graphite Inorganic materials 0.000 claims description 20
- 239000010439 graphite Substances 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000000452 restraining effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 5
- 238000004590 computer program Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004299 exfoliation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021392 nanocarbon Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
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 stops between the grounding electrode (7) and the high-voltage electrode (10); and charging voltage into the energy storage capacitor C, introducing large 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 the powder is loose and cannot be linearly spread on the material carrying rod, avoids the introduction of impurity elements after explosion, prolongs the service life and better restricts energy accumulation.
Description
Technical Field
The invention relates to a device and a method for continuously preparing graphene by a powder-carrying constrained electrical explosion method, and belongs to the technical field of electrical explosion powder making devices.
Background
Graphene has received extensive attention in many research fields due to its unique mechanical and electrical properties; the method obtains a highly effective result in the fields of new energy materials of super capacitors and secondary batteries, various film materials for heat dissipation, corrosion prevention, heating, seawater desalination and wave absorption, and composite materials of macromolecules, metals, ceramics and graphene, and shows good scale application prospects.
The graphene used in the fields is usually powder, the using amount is large during industrial application, various improved Hummers methods are mostly adopted for preparation, firstly, a strong oxidant is used for oxidizing and intercalating the graphite, and the atomic distance is increased; stripping the graphene oxide into graphene oxide by stirring or ultrasonic treatment and other methods; and then 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 high dispersibility, the content of impurity elements is high, and a large amount of waste liquid is generated in the process.
The development of a low-cost, green and large-scale high-quality graphene preparation method and process with fine structure regulation and control is clearly recognized in various research fields and becomes a key core problem of graphene technology development. Mechanical exfoliation is an original and promising green method for preparing graphene, and high-quality graphene sheets with good conductivity can be obtained by overcoming van der waals force interaction between graphene layers by using mechanical energy. Graphite and a solvent are mixed, energy is input by methods of ultrasonic wave, stirring, ball milling and the like, and the graphite particles are collided with each other and interact with the wall of the device and the solution to realize gradual crushing and stripping of the graphite particles. However, when the mass of the exfoliated graphite micro-platelets is reduced to a certain extent, the collision kinetic energy thereof is gradually reduced, and further exfoliation of the graphite micro-platelets becomes increasingly difficult. In the graphite products obtained, the proportion of graphene actually contained is very low.
The method for preparing graphene by using an electric explosion method is a novel method for producing graphene by mechanical stripping. Feeding a graphite raw material into an explosion confinement cavity; two discharge electrodes connected with the pulse energy storage capacitor lead large current into the graphite raw material in a gas discharge mode, so that the graphite raw material is heated and explodes. The explosion products of the graphite are subjected to a high-temperature high-pressure process in the constraint channel and then are ejected out of the nozzle along with the shock wave, and the graphite is stripped or crushed into graphene under the action of the high pressure, the high temperature and the shock wave. And the explosion-sprayed graphene is uniformly suspended in a protective atmosphere to form aerosol. The graphene aerosol with a certain concentration is obtained by controlling the frequency of electric explosion, and can be directly used for preparing graphene/metal matrix composite materials and graphene films and mixing with powder or liquid.
At present, a device for preparing nano carbon by continuously restraining electrical explosion graphite in a mode of feeding by a powder feeder is used for preparing graphene by a restraining electrical explosion method, an electric telescopic rod is adopted by the device to reciprocate to drive a restraining sleeve to move together, the powder feeder sprays powder in a linear shape in a material carrying rod in the process, but the powder feeder self-made by the device cannot guarantee that the powder is spread on the material carrying rod in a linear shape and the powder is loose, so that the requirement of detonation cannot be met during explosion, and the productivity is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide the device and the method for continuously preparing the graphene by the powder-carrying constraint electric explosion method, so that the problem that the powder cannot explode due to being loose and cannot be linearly spread on a material carrying rod is solved, the introduction of impurity elements after explosion is avoided, the service life is prolonged, and the constraint energy collection can be better realized.
In order to achieve the purpose, the invention provides a device for continuously preparing graphene by 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 carrying out 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 penetrates 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 powder-carrying belt is loaded with the graphite powder.
Preferentially, the explosion mechanism comprises an energy storage capacitor C, a grounding conductive tube and a high-voltage conductive tube, 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 extends into the grounding conductive tube, and the left end of the grounding conductive tube is provided with an explosion nozzle.
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 inside 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 inside the right end of the polyethylene explosion tube, the connecting tube is fixedly arranged inside 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 pipe, the high-voltage electrode, the polyethylene explosion tube and the grounding electrode from right to left;
explosion through holes matched with the explosion nozzles are formed in the grounding electrode and the polyethylene explosion tube, the explosion through holes are communicated with the explosion nozzles, voltage is charged into the energy storage capacitor C, large current is led into graphite powder between the grounding electrode and the high-voltage electrode and explosion occurs, and explosion products obtained by explosion are directionally sprayed into an argon medium through the explosion nozzles to form graphene aerosol.
Preferably, the driving mechanism comprises a pressing wheel, a driving wheel and a carrier tape wheel, the driving mechanism is positioned on the left side of the explosion mechanism, the pressing wheel and the driving wheel are fixedly arranged on two sides of the powder carrying tape, and the pressing wheel presses the powder carrying tape on the driving wheel and is used for driving the powder carrying tape to rotate;
the powder carrying belt 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;
when the device works, the driving wheel drives the powder carrying belt waiting for the electric explosion method to move leftwards, the carrier belt wheel is pulled to rotate, the driving wheel stops rotating after the powder carrying belt moves through the 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 carried out on the graphite powder loaded on the powder carrying belt;
after the electric explosion method is implemented, 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.
Preferably, the ground electrode and the high voltage electrode are made of graphite.
A method for continuously preparing graphene by a powder-carrying constrained electrical explosion method adopts any one of the devices, and comprises the following steps:
the driving wheel drives the powder carrying belt waiting for the electric explosion method to move leftwards;
the driving wheel stops rotating after the powder carrying belt passes through the fixed displacement;
waiting for the powder carrying belt subjected to the electric explosion method to stop between the grounding electrode and the high-voltage electrode;
charging voltage into the energy storage capacitor C, introducing large current into the graphite powder between the grounding electrode and the high-voltage electrode, exploding, and directionally spraying an explosion product obtained by explosion into an argon medium through an explosion nozzle to form graphene aerosol;
after the electric explosion method is implemented, 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;
and repeating the steps until all the graphite powder loaded by the powder loading belt is subjected to the electric explosion method.
The invention achieves the following beneficial effects:
the powder carrying belt filled with the compacted graphite powder solves the problem that the powder cannot explode on the material carrying belt due to looseness and incapability of linearly spreading, the graphite powder is more strongly restrained by utilizing the high-density polyethylene belt to carry the graphite powder, and the stability of feeding the graphite powder by continuous electric explosion is greatly improved; 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 gathering can be restrained better, graphite powder can be stripped into graphene better, and the device provides industrialized conditions for preparation of the graphene.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the powder carrier tape of the present invention.
The reference numeral, 1 pinch roller, 2 drive wheel, 3 powder carrying belt, 4 guide wheel, 5 explosion nozzle, 6 grounding conductive tube, 7 grounding electrode, 8 polyethylene explosion tube, 9 connecting tube, 10 high voltage electrode, 11 high voltage conductive tube, 12 graphite powder, 13 belt carrying wheel.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
It should be noted that, if directional indications (such as up, down, left, right, front, and back) are provided in the embodiment of the present invention, they are only used to explain the relative position relationship and movement of each component in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
Example one
The utility model provides a take and carry powder restraint electric explosion method to prepare graphite alkene device in succession, including carrying the powder area, be used for driving and carry the pivoted actuating mechanism of powder area, be used for carrying the explosion mechanism of electric explosion method to carrying the powder area, be used for carrying the powder area 3 of graphite powder 12 and be used for the compound blast tube of the explosion energy that the restraint electric explosion method produced, compound blast tube fixed mounting is inside the explosion mechanism, carries powder area 3 and passes compound blast tube, actuating mechanism, explosion mechanism, carry powder area 3 and compound blast tube and all place in the argon gas medium, carry powder area 3 and go up 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 extends into the grounding conductive tube 6, and the 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 inside 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 extends 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;
explosion through holes matched with the explosion nozzles 5 are formed in the grounding electrode 7 and the polyethylene explosion tube 8, the explosion through holes are communicated with the explosion nozzles 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 is exploded, and explosion products obtained by explosion are directionally sprayed into an argon medium through the explosion nozzles 5 to form graphene aerosol.
Preferentially, the driving mechanism comprises a pressing wheel 1, a driving wheel 2 and a carrier tape wheel 13, the driving mechanism is positioned on the left side of the explosion mechanism, the pressing wheel 1 and the driving wheel 2 are fixedly arranged on two sides of the powder carrying tape 3, and the pressing wheel 1 presses the powder carrying tape 3 on the driving wheel 2 and is used for driving the powder carrying tape 3 to rotate;
the powder carrying belt 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 powder carrying belt 13;
when the powder loading device works, the driving wheel 2 drives the powder loading belt 3 waiting for the electric explosion method to move leftwards, the carrier belt wheel 13 is pulled to rotate, the driving wheel 2 stops rotating after the powder loading belt 3 moves through fixed displacement, the powder loading belt 3 waiting for the electric explosion method finally stops between the grounding electrode 7 and the high-voltage electrode 10, and the graphite powder 12 loaded by the powder loading belt 3 is subjected to the electric explosion method;
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.
Preferably, the ground electrode 7 and the high voltage electrode 10 are made of graphite.
A method for continuously preparing graphene by a powder-carrying constrained electrical explosion method adopts any one of the devices, and comprises the following steps:
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 the fixed displacement;
the powder carrying belt 3 waiting for the electric explosion method stops 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, 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 electric explosion method is implemented, 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;
and repeating the steps until all the graphite powder 12 loaded by the powder loading belts 3 are 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 pinch roller 1, the driving wheel 2, the energy storage capacitor C, the grounding electrode 7, the high-voltage electrode 10 and the carrying wheel 13 are available in various types in the prior art, and those skilled in the art can select an appropriate type according to actual requirements, and the embodiment is not illustrated.
Example two
The device 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 includes a pressing wheel 1, a driving wheel 2, a powder carrying belt 3, a guide wheel 4 and a belt 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 pull forward under the action of pressure, then the belt carrying wheel 13 is pulled to rotate, the driving wheel 2 stops rotating after the powder carrying belt 3 passes through a polyethylene explosion tube 8 to move forward and move away through a fixed displacement, and the process is continued after one-time explosion is completed, so that continuous electric explosion is realized. 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 includes 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, in an argon medium with a certain air pressure, 10-14kV voltage is charged into an energy storage capacitor C, 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, a pulse large current is conducted to both the grounding electrode 7 and the high-voltage electrode 10, the graphite powder is exploded under the action of the large current, as only an explosion nozzle 5 of the composite tube composed of the polyethylene explosion tube 8, the grounding electrode 7 and the high-voltage electrode 10 is open in a large area, explosion products are ejected outwards through the explosion nozzle 5, and graphene aerosol is formed in the argon medium after ejection.
As shown in fig. 1 and 2, the composite explosion tube includes a grounding electrode 7, a polyethylene explosion tube 8, a connecting tube 9 and a high voltage electrode 10, the connecting tube 9 is added into the polyethylene explosion tube 8 in a concentric circle manner, 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 installed between a grounding conductive tube 6 and a high voltage conductive tube 11, a hole in the middle of the high voltage electrode 10 can only pass through a powder carrying belt 3, the area of the hole in the middle of the high voltage electrode 10 can be ignored relative to an explosion nozzle 5, a product after explosion is ejected outwards through the explosion nozzle 5, and graphene aerosol is formed in an argon medium after ejection;
the low-voltage grounding electrode 7 and the polyethylene explosion tube 8 are provided with through holes with the diameter of 4mm at the centers, the composite explosion tube formed in such a way has one closed end and one open end, and explosion products are sprayed out through the explosion nozzle 5 at one end after explosion.
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 contacted 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 other end of the grounding conductive tube 6 is provided with an explosion nozzle 5, and the other end of the grounding conductive tube 6 is internally provided with a grounding electrode 7; the graphite powder 12 is compacted on the powder carrying belt 3, the driving mechanism continuously sends the powder carrying belt 3 to 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 composite explosion tube is characterized in that a connecting pipe 9 is concentrically added into a polyethylene explosion tube 8, the length of the connecting pipe 9 is 70 +/-2 mm, explosion through holes with the diameter of 4mm are formed in the connecting pipe 9 and a grounding electrode 7, a hole in the center of a high-voltage electrode 10 can only pass through a powder carrying belt 3, and the composite explosion tube is longer in service life and can be replaced during continuous electric explosion.
The grounding electrode 7 and the high-voltage electrode 10 are made of graphite, and no impurity element is introduced into the powder after explosion.
Because the explosion energy is high, the polyethylene explosion tube 8 is cracked, and all the energy cannot be used for stripping the graphite powder, a composite explosion tube is added into the polyethylene explosion tube 8, and the composite explosion tube comprises a concentric connecting tube 9, so that the explosion energy is better restrained; graphite powder 12 is fed between the ground electrode 7 and the high voltage electrode 10 by a drive 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 grounding 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 powder carrying belt 3 filled with graphite powder 12 is wound on a belt carrying wheel 13, the device is placed in an argon medium with certain air pressure, a driving wheel 2 is started, the driving wheel 2 starts to rotate, the powder carrying belt 3 is pulled to send the graphite powder 12 between a grounding electrode 7 and a high-voltage electrode 10, the driving wheel 2 stops, then a direct-current high-voltage generator H.V charges an energy storage capacitor C to a certain voltage within a set range of 10-14kV, after the required voltage is reached, energy in the energy storage capacitor C is led into the graphite powder 12, the graphite powder 12 instantly generates a large amount of joule heat to explode, explosion products are sprayed into an argon atmosphere through an explosion nozzle 5 to form graphene aerosol, and a primary explosion spraying process is completed. Then charging the energy storage capacitor C, and allowing the graphite powder 12 waiting for the next section to be subjected to the electric explosion method to enter between the high-voltage electrode 10 and the grounding electrode 7 for explosion; the process is repeatedly executed, and stable and continuous electric explosion powder making 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
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 an 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) penetrates 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).
2. The device for continuously preparing graphene by the constrained electrical explosion method with carried powder according to claim 1,
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 the left end of the grounding conductive tube (6) is provided with an explosion nozzle (5).
3. The device for continuously preparing graphene by the constrained electrical explosion method with carried powder according to claim 2,
the composite explosion tube comprises a grounding electrode (7), a polyethylene explosion tube (8), a connecting pipe (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 pipe (9) is fixedly arranged in the polyethylene explosion tube (8), the high-voltage electrode (10) is positioned between the connecting pipe (9) and the high-voltage conductive tube (11), the left end of the high-voltage conductive tube (11) extends into the polyethylene explosion tube (8) to be contacted with the right end of the high-voltage electrode (10), and the high-voltage electrode (10) is provided with a powder carrying belt through hole matched with a powder carrying belt (3) 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;
explosion through holes matched with the explosion nozzles (5) are formed in the grounding electrode (7) and the polyethylene explosion tube (8), the explosion through holes are communicated with the explosion nozzles (5), voltage is charged into the energy storage capacitor C, large current is led into graphite powder (12) between the grounding electrode (7) and the high-voltage electrode (10) and is exploded, and explosion products obtained by explosion are directionally sprayed into an argon medium through the explosion nozzles (5) to form graphene aerosol.
4. The device for continuously preparing graphene by the constrained electrical explosion method with carried powder according to claim 3,
the driving mechanism comprises a pressing wheel (1), a driving wheel (2) and a carrier belt wheel (13), the driving mechanism is positioned on the left side of the explosion mechanism, the pressing wheel (1) and the driving wheel (2) are fixedly arranged on two sides of the powder carrying belt (3), and the pressing wheel (1) presses the powder carrying belt (3) on the driving wheel (2) and is used for driving the powder carrying belt (3) to rotate;
the powder carrying belt (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 powder carrying belt (13);
when the powder loading device works, the driving wheel (2) drives the powder loading belt (3) waiting for carrying out the electric explosion method to move leftwards, the driving wheel (2) is pulled to rotate, the powder loading belt (3) stops rotating after passing through the fixed displacement, the powder loading belt (3) waiting for carrying out the electric explosion method finally stops between the grounding electrode (7) and the high-voltage electrode (10), and the electric explosion method is carried out on the graphite powder (12) loaded by the powder loading belt (3);
after the electric explosion method is implemented, the driving wheel (2) drives the powder carrying belt (3) to continuously move leftwards, and drives the next section of the powder carrying belt (3) waiting for the electric explosion method to stop between the grounding electrode (7) and the high-voltage electrode (10).
5. The device for continuously preparing graphene by the constrained electrical explosion method with the carrier powder according to claim 3, wherein the grounding electrode (7) and the high-voltage electrode (10) are made of graphite.
6. A method for continuously preparing graphene by a powder-loaded constrained electrical explosion method is characterized in that the device of any one of claims 1-5 is adopted, and the following steps are carried out:
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) passes through the fixed displacement;
the powder carrying belt (3) waiting for the electric explosion method stops 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, and directionally spraying an explosion product obtained by explosion into an argon medium through an explosion nozzle (5) to form graphene aerosol;
after the electric explosion method is implemented, 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);
and repeating the steps until all the graphite powder (12) loaded by the powder loading belt (3) is subjected to the electric explosion method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448303.4A CN114804086B (en) | 2022-04-27 | 2022-04-27 | Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448303.4A CN114804086B (en) | 2022-04-27 | 2022-04-27 | Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114804086A true CN114804086A (en) | 2022-07-29 |
| CN114804086B CN114804086B (en) | 2024-01-26 |
Family
ID=82508363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210448303.4A Active CN114804086B (en) | 2022-04-27 | 2022-04-27 | Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114804086B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628152A (en) * | 2011-09-09 | 2012-08-08 | 兰州理工大学 | Conveyor belt continuous powder feeding electrothermal explosion spraying device |
| CN103305785A (en) * | 2012-03-06 | 2013-09-18 | 兰州理工大学 | Pressure sensitive adhesive carrier powder continuous electro-explosive spraying device |
| CN104925788A (en) * | 2015-05-08 | 2015-09-23 | 北京理工大学 | Method for preparing graphene material through electric explosion |
| CN105817637A (en) * | 2016-04-20 | 2016-08-03 | 兰州理工大学 | Device for preparing nanometer powder through material melting pipe constraining electrical explosion method |
| CN107309435A (en) * | 2017-06-15 | 2017-11-03 | 成都新柯力化工科技有限公司 | A kind of method that discharge-induced explosion spraying prepares graphene Al alloy composite |
| CN110255530A (en) * | 2019-06-24 | 2019-09-20 | 兰州理工大学 | A kind of device of constraint electric detonation graphite preparation low-dimensional nano-sized carbon |
| US20210220911A1 (en) * | 2018-05-23 | 2021-07-22 | Sangeeta Lal | An apparatus and a method for producing nanaoparticles and nanocomposites by controlled electro-explosion of a metal wire |
-
2022
- 2022-04-27 CN CN202210448303.4A patent/CN114804086B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628152A (en) * | 2011-09-09 | 2012-08-08 | 兰州理工大学 | Conveyor belt continuous powder feeding electrothermal explosion spraying device |
| CN103305785A (en) * | 2012-03-06 | 2013-09-18 | 兰州理工大学 | Pressure sensitive adhesive carrier powder continuous electro-explosive spraying device |
| CN104925788A (en) * | 2015-05-08 | 2015-09-23 | 北京理工大学 | Method for preparing graphene material through electric explosion |
| CN105817637A (en) * | 2016-04-20 | 2016-08-03 | 兰州理工大学 | Device for preparing nanometer powder through material melting pipe constraining electrical explosion method |
| CN107309435A (en) * | 2017-06-15 | 2017-11-03 | 成都新柯力化工科技有限公司 | A kind of method that discharge-induced explosion spraying prepares graphene Al alloy composite |
| US20210220911A1 (en) * | 2018-05-23 | 2021-07-22 | Sangeeta Lal | An apparatus and a method for producing nanaoparticles and nanocomposites by controlled electro-explosion of a metal wire |
| CN110255530A (en) * | 2019-06-24 | 2019-09-20 | 兰州理工大学 | A kind of device of constraint electric detonation graphite preparation low-dimensional nano-sized carbon |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114804086B (en) | 2024-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120315539A1 (en) | Nanostructure composite batteries and methods of making same from nanostructure composite sheets | |
| CN103191683B (en) | Device of preparing nano powder material through electrical explosion | |
| CN102910630A (en) | Production method of nano silicon powder | |
| US20230405674A1 (en) | Continuous low-temperature plasma powder treatment and ball-milling production device and method thereof | |
| CN111940757A (en) | Device and method for continuously preparing noble metal and alloy nanoparticles thereof | |
| JP2015516643A (en) | Nanostructured composite battery and method for producing nanostructured composite battery from nanostructured composite sheet | |
| JP2020055740A (en) | Plate-shaped-material exfoliating apparatus comprising optimized discharge portion | |
| CN106449163A (en) | Special grapheme composite conducting agent for supercapacitor current collector and preparation method thereof | |
| CN100457337C (en) | Method of preparing conductive metal nanometer powder by consumbale-cathode DC electric arc method | |
| CN102909386B (en) | Production method of superfine spherical aluminium powder | |
| CN114804086A (en) | Device and method for continuously preparing graphene by powder-carrying constrained electric explosion method | |
| WO1992017303A1 (en) | Method and installation for obtaining highly dispersive powders of non-organic substances | |
| CN102672189A (en) | Preparation method of spherical tungsten powder | |
| CN106384827A (en) | Graphene-molybdenum disulfide composite conductive paste for lithium battery and preparation method thereof | |
| CN105817637A (en) | Device for preparing nanometer powder through material melting pipe constraining electrical explosion method | |
| CN209698045U (en) | A kind of continuous wire feeder of metallic nano powder preparing equipment by electric explosion method | |
| CN110808375B (en) | Preparation method and device of graphene carbon nanotube composite conductive liquid and conductive liquid | |
| KR102416232B1 (en) | Manufacturing apparatus and manufacturing method of reduced graphene oxide | |
| CN109604619A (en) | A kind of method that styrene-based class monomer uv photopolymerization prepares Nano silver grain | |
| CN218795855U (en) | Device for preparing nano diamond powder by using underwater electric explosion metal wire | |
| CN111682202A (en) | Method for synthesizing rodlike lithium iron phosphate by PVA (polyvinyl alcohol) -assisted two-fluid spraying solid phase | |
| CN111533123B (en) | Device and method for preparing sulfur-free expandable graphite by using plasma | |
| CN218903622U (en) | Preparation facilities of nanoscale gold powder | |
| CN114932229B (en) | Continuous wire feeding mechanism and wire electric explosion device | |
| CN212264145U (en) | Garbage disposal system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |