CN112479194B - Graphene composite particle preparation device and method - Google Patents
Graphene composite particle preparation device and method Download PDFInfo
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- CN112479194B CN112479194B CN202011582879.7A CN202011582879A CN112479194B CN 112479194 B CN112479194 B CN 112479194B CN 202011582879 A CN202011582879 A CN 202011582879A CN 112479194 B CN112479194 B CN 112479194B
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Abstract
The invention provides a graphene composite particle preparation device and a method, which comprises a feeding device for adding various raw materials, wherein a roller stirring device for stirring the raw materials is arranged right below the feeding device, a stirring and evaporating device is arranged right below the roller stirring device, and a freeze drying and screening system is arranged right below the stirring and evaporating device; the freeze drying and screening system comprises a freeze drying device and a screening device; and a collecting system is arranged on the side surface of the freeze drying and screening system. The graphene composite particles have good dispersibility, fluidity and standard particle size, so that the graphene is effectively and uniformly wrapped on the surface of the core ions.
Description
Technical Field
The invention relates to a graphene composite particle preparation device, which is used for preparing graphene composite particles and belongs to the technical field of graphene preparation.
Background
Electromagnetic pollution has been recognized as the fourth major nuisance to be discharged after atmospheric pollution, water pollution, noise pollution. The human environment of united nations will largely place electromagnetic radiation as one of the major pollutants that must be controlled. According to foreign data, electromagnetic radiation has become one of the pathogenic sources harmful to human health today. Electromagnetic pollution refers to interference of various electromagnetic waves and harmful electromagnetic radiation, both natural and man-made. Along with the popularization and application of the 5G technology, the power of radio frequency equipment is multiplied, the electromagnetic radiation on the ground is greatly increased, and the human health is further harmed.
How to reduce the pollution of electromagnetic waves is one of the problems that we are exploring today. The magnetic coated core-shell structure has been recently researched due to its excellent electromagnetic properties, and the coating with magnetic metal is the most common, and can be divided into uniform film coating and particle coating according to the form of the coating layer. Traditional wave-absorbing materials, such as ferrite, metal micro powder, carbon materials, conductive polymers and the like, are difficult to meet the comprehensive requirements of thinness, width, lightness and strength. The coated core-shell type composite wave-absorbing material can simultaneously have the performances of a core layer material and a shell layer material, can show good wave-absorbing capability superior to that of a single-component material, and is widely applied in the electromagnetic shielding direction.
Graphene is a novel two-dimensional atomic crystal of a monoatomic layer structure with C atoms connected by sp2 hybridization, which is excellent in properties. The most stable benzene six-membered ring in the organic material, and the most ideal two-dimensional nano material. And also a layer of C atoms on a dense and wrapped honeycomb crystal lattice. The graphene has excellent physical properties due to the stable microstructure, and the excellent thermal conductivity, light transmittance, electrical conductivity and high strength of the graphene lay the foundation for wide use of the graphene.
The graphene composite particles can be used for molding and manufacturing electromagnetic shielding materials, and a solution blending method is one of the preparation methods, and the traditional preparation method is as follows (the preparation method of the aluminum powder graphene composite particles is introduced): respectively weighing the required weight of graphene, the core particles of alumina powder, absolute ethyl alcohol and the prepared absolute ethyl alcohol solution of phenolic resin. The graphene is added into the absolute ethyl alcohol solution and stirred, and at the moment, the graphene can be well dispersed in the absolute ethyl alcohol solution. Then adding the prepared phenolic resin, finally adding alumina powder and continuously stirring to disperse the alumina powder in the absolute ethyl alcohol solution, keeping the stirring state, taking the mixture on a water bath heater to evaporate to dryness, and continuously stirring while evaporating to dryness. And finally evaporating to dryness to obtain the alumina graphene composite particles. However, due to the self-weight of the aluminum alloy, and the centripetal force, the aluminum alloy ends up collecting at the bottom of the container, and it is difficult to achieve the desired dispersion effect. In the heating process, if the aluminum alloy powder cannot be fully dispersed in the solution, the graphene can be finally separated out earlier than the aluminum alloy particles, so that the self-adhesion of the graphene is caused, and the obtained composite particles are not the composite particles of the aluminum powder wrapped by the graphene but graphene clusters. Only a small part of aluminum alloy particles can be wrapped by graphene after being dried by distillation, and the desired composite particles are obtained. And the screening difficulty of the particles is high, and the particles are difficult to utilize. Therefore, the traditional method is time-consuming and labor-consuming, has poor preparation effect, and is easy to cause resource waste, difficult screening of useful particles and other problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for preparing graphene composite particles, which meet the requirements that the graphene composite particles have good dispersibility, flowability and standard particle size, so that graphene is effectively and uniformly wrapped on the surface of core ions.
In order to achieve the technical features, the invention is realized as follows: the graphene composite particle preparation device is characterized by comprising a feeding device for adding various raw materials, wherein a roller stirring device for stirring the raw materials is arranged right below the feeding device, a stirring and evaporating device is arranged right below the roller stirring device, and a freeze drying and screening system is arranged right below the stirring and evaporating device;
the freeze drying and screening system comprises a freeze drying device and a screening device;
and a collecting system is arranged on the side surface of the freeze drying and screening system.
Feeding device adopts compound reinforced structure, guarantees reinforced cylinder, reinforced cylinder is inside to separate into absolute ethyl alcohol feeding device, particle feeding device and graphite alkene feeding device through a plurality of baffles, and every feeding device's below all sets up corresponding opening for the raw materials that add falls into cylinder agitating unit's inside.
The drum stirring device comprises a cabin body, a first rotating motor and a first ultrasonic motor are respectively installed on two outer side walls of the cabin body, a stirring main shaft is installed between main shafts of the first rotating motor and the first ultrasonic motor, a longitudinal stirring strip and a transverse stirring plate are vertically fixed on the stirring main shaft, and a cabin door mechanism for blanking is arranged at the bottom of the cabin body; the cabin door mechanism adopts symmetrical open type cabin door plates.
The stirring and evaporating device comprises a stirring and evaporating outer barrel, an inner container is arranged inside the stirring and evaporating outer barrel, and a heating device is arranged in an interlayer between the inner container and the stirring and evaporating outer barrel; the central position of the outer barrel body of the stirring evaporation to dryness is provided with a central stirring shaft, the central stirring shaft is connected with a second rotating motor spindle used for driving the central stirring shaft to rotate, a second ultrasonic motor is installed below the second rotating motor, and a brush used for stirring is installed on the central stirring shaft.
The diameter of the stirring and drying outer cylinder is larger than the opening size of a cabin door mechanism of the stirring device of the roller;
the heating device adopts a water bath heating device, an electric heating device or an electromagnetic heating device;
the inner part of the stirring and evaporating outer cylinder body adopts a conical structure, and the inner container adopts a detachable structure;
the hairbrush is a fiber brush.
The freezing and evaporating device adopts a freezing vacuum box structure; the top of the freezing vacuum box structure is provided with a sliding chute, and a sealing cover plate is in sliding fit with the sliding chute.
The screening device comprises a large-particle screening frame, a medium-particle screening frame, a small-particle screening frame and a minimum particle collecting frame which are sequentially stacked from top to bottom.
The collecting system comprises a bearing frame, a sliding rail is arranged on the bearing frame, a plurality of layers of collecting plates are slidably supported on the sliding rail, and the collecting plates can stretch into the screening frame of the screening device.
The method for preparing the graphene composite particles by adopting the graphene composite particle preparation device comprises the following steps:
step one, adding raw materials: respectively adding corresponding amounts of absolute ethyl alcohol, core particles and graphene powder into an absolute ethyl alcohol feeding device, a particle feeding device and a graphene feeding device according to the mixing ratio;
step two, mixing and stirring the raw materials: feeding the liquid and the powder prepared in the step one into a roller stirring device after blanking, starting a first rotating motor and a first ultrasonic motor to drive corresponding stirring main shafts, longitudinally disturbing particles through longitudinal stirring strips in the stirring process, transversely disturbing the particles through a transverse stirring plate, and fully dispersing the particles in an absolute ethyl alcohol solution;
step three, heating and evaporating the mixture which is prepared uniformly by preliminary mixing: opening a bin door plate of a roller stirring device, putting the material into the stirring and drying outer barrel of the stirring and drying device, starting a second ultrasonic motor and a second rotating motor to drive a central stirring shaft, driving a brush through the central stirring shaft, and simultaneously starting a heating device, wherein the stirring and drying device is used for drying absolute ethyl alcohol by distillation so as to separate out particles, and continuously scattering the particles in the stirring process so as to avoid particle agglomeration and uniformly distribute the particles; the second ultrasonic motor assists the loose-shaped hairbrush to break up particles;
step four, performing vacuum freezing on the evaporated material: after the graphene composite particles are stirred and evaporated by the stirring and evaporation device, due to the fact that the graphene composite particles are loose and porous, moisture or absolute ethyl alcohol from air can be easily absorbed, and the graphene composite particles need to be evaporated by a vacuum drying system under a freezing vacuum condition;
step five, screening the graphene composite particles: the graphene composite particles which are stirred and steamed to be dry are collected into a large particle screening plate, at the moment, screening plates at all levels start to shake and screen, and the particles sequentially flow through a medium particle screening frame, a small particle screening frame and a minimum particle collecting frame;
step six, collecting the screened graphene composite particles: after the screening is finished, the collecting plate is stretched into each stage of screening frame, and the screening frame is taken out and finally collected and used by experimenters.
Compared with the prior art, the invention has the following beneficial effects:
1. the preparation device for the graphene composite particles can be used for preparing the graphene composite particles, and the graphene composite particles have good dispersibility, flowability and standard particle size, so that the graphene is effectively and uniformly wrapped on the surface of core ions; based on the traditional solution blending method, the method adjusts the coating of the special material graphene by means of ultrasonic oscillation, freeze drying and rolling ball milling, and greatly improves the coating effect and the powder flowability.
2. The fluid is driven to rotate in the vertical direction by the roller stirrer and the brush 21 thereof with the structure, so that the core particles at the bottom are rolled up and then sink due to self weight. This is repeated to disperse the core particles uniformly in the solution.
3. In the heating and drying process, the core particles still can be precipitated, so that the heating and stirring device is designed into a round hammer shape, and the area of concentrated precipitation of aluminum can be minimized. The high-density conical stirring brush and the second ultrasonic motor are used simultaneously, the high-density brush can well adsorb core particles and can well drive fluid, and when the second ultrasonic motor shakes off particles on the stirring brush, the particles can be uniformly dispersed in a solution of the stirring device.
4. In the process of drying by distillation, because the core particles are well distributed in the graphene solution in advance, when the graphene, the phenolic resin and the core particles are separated out, the graphene, the phenolic resin and the core particles are fully bonded together, meanwhile, due to the rotation of the high-density fiber brush and the vibration of ultrasonic waves, some large composite particles are crushed, secondary load wrapping is carried out on the composite particles, and the steps are repeated in such a way, so that the fine composite particles are finally obtained.
5. After the thermal evaporation, the graphene composite particles are in a loose porous structure, so that the graphene composite particles cannot be completely dried by the traditional preparation method, and the powder particles enter a screening device from a stirring evaporation device for further complete drying. After the particles are completely dried, the mixture is kept still to be recovered to room temperature, and then poured into a screening device for screening.
6. The screening device can select different screening nets according to experimental requirements and actual requirements, and specific mesh number of each layer can be utilized.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a three-dimensional view of the present invention.
Figure 2 is a diagram of a charging device according to the invention.
FIG. 3 is a diagram of a drum mixer according to the present invention.
FIG. 4 is a view showing an opened state of the drum mixer of the present invention.
FIG. 5 is a drawing of a conical stirring device of the present invention.
Figure 6 is a drawing of a collection plate and freeze-dryer of the present invention.
Figure 7 is a diagram of a screening device of the present invention.
FIG. 8 is a diagram of the collection process of the present invention.
In the figure: the device comprises a feeding device 1, a roller stirring device 2, a stirring and drying device 3, a freeze drying and screening system 4, a collecting system 5, an absolute ethyl alcohol feeding device 6, a particle feeding device 7, a graphene feeding device 8, a discharge hole 9, a first rotating motor 10, a cabin body 11, a transverse stirring plate 12, a longitudinal stirring strip 13, a first ultrasonic motor 14, a cabin door mechanism 15, a cabin door plate 16, a second ultrasonic motor 17, a second rotating motor 18, a stirring and drying device outer wall 19, an inner container 20, a brush 21, a bearing frame 22, a collecting plate 23, a screening and collecting device 24, a vacuum drying system 25, a large particle screening frame 26, a medium particle screening frame 27, a small particle screening frame 28, a minimum particle collecting frame 29, a sliding rail 30, a sealing cover plate 31 and a sliding chute 32.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings, and the specific embodiments described herein are only used for explaining the present invention, but the present invention is not limited to the scope.
Example 1:
referring to fig. 1-8, a graphene composite particle preparation device comprises a feeding device 1 for adding a plurality of raw materials, a roller stirring device 2 for stirring the raw materials is arranged right below the feeding device 1, a stirring and drying device 3 is arranged right below the roller stirring device 2, and a freeze-drying and screening system 4 is arranged right below the stirring and drying device 3; the freeze drying and screening system 4 comprises a freeze drying device 25 and a screening device 24; the side of the freeze drying and screening system 4 is provided with a collection system 5. The device with the structure can be used for preparing the graphene composite particles, and the graphene composite particles have good dispersity, flowability and standard particle size, so that the graphene is effectively and uniformly wrapped on the surface of the core ion; based on the traditional solution blending method, the method adjusts the coating of the special material graphene by means of ultrasonic oscillation, freeze drying and rolling ball milling, and greatly improves the coating effect and the powder flowability.
Further, feeding device 1 adopts compound reinforced structure, guarantees reinforced cylinder, reinforced cylinder is inside to separate into absolute ethyl alcohol feeding device 6, particle feeding device 7 and graphite alkene feeding device 8 through a plurality of baffles, and every feeding device's below all sets up corresponding opening for the raw materials that add fall into the inside of cylinder agitating unit 2. Respectively for adding corresponding powders, and are not miscible. The feeding device 1 can add powder or liquid according to the desired ratio. In the specific preparation process, the feeding device is a manual feeding device, and required materials need to be calculated and weighed by self. The purpose of this design is to reduce the difficulty of entry and initial development costs for junior users.
Further, the drum stirring device 2 comprises a cabin 11, a first rotating motor 10 and a first ultrasonic motor 14 are respectively installed on two outer side walls of the cabin 11, a stirring main shaft is installed between the main shafts of the first rotating motor 10 and the first ultrasonic motor 14, a longitudinal stirring bar 13 and a transverse stirring plate 12 are vertically fixed on the stirring main shaft, and a cabin door mechanism 15 for blanking is arranged at the bottom of the cabin 11; the hatch door mechanism 15 adopts a symmetrically-opened hatch door plate 16. The drum stirring device 2 is used to fully disperse the added graphene and core particles in the absolute ethyl alcohol. The drum stirrer is additionally provided with a longitudinal stirring bar 13 and a transverse stirring plate 12, the longitudinal stirring bar 13 with different hardness can be designed according to different requirements, two motors are arranged at two ends of the drum stirrer, a first rotating motor 10 is arranged at one end of the drum stirrer, and a first ultrasonic motor 14 is arranged at the other end of the drum stirrer. The motors can be additionally arranged or freely distributed according to actual requirements.
Further, the stirring and evaporating device 3 comprises a stirring and evaporating outer cylinder 19, an inner container 20 is arranged inside the stirring and evaporating outer cylinder 19, and a heating device is arranged in an interlayer between the inner container 20 and the stirring and evaporating outer cylinder 19; the central part of the outer cylinder 19 of the stirring evaporation is provided with a central stirring shaft, the central stirring shaft is connected with a main shaft of a second rotating motor 18 for driving the second rotating motor to rotate, a second ultrasonic motor 17 is installed below the second rotating motor 18, and a brush 21 for stirring is installed on the central stirring shaft. And the stirring and drying device 3 is used for heating and drying the absolute ethyl alcohol to dryness and simultaneously separating out the composite particles. The stirring is to fully disperse the aluminum powder in the ethanol solution of the graphene and the resin when the aluminum powder is evaporated to dryness, and to prevent the composite particles from agglomerating, bonding and the like in the gradual evaporation to dryness process, so that the particles are uniformly distributed. The second ultrasonic motor 17 assists the loose stirring bar in breaking up the particles.
Further, the diameter of the stirring and drying outer cylinder 19 is larger than the opening size of the hatch door mechanism 15 of the drum stirring device 2; so as to avoid liquid leakage. The heating device adopts a water bath heating device, an electric heating device or an electromagnetic heating device; the inner part of the stirring and evaporating outer cylinder body 19 adopts a conical structure, and the inner container 20 adopts a detachable structure; the brush 21 is a fiber brush.
Further, the freeze drying device 25 adopts a freeze vacuum box structure; the top of the freezing vacuum box structure is provided with a chute 32, and a sealing cover plate 31 is matched on the chute 32 in a sliding manner. The effect of freeze-drying is to further dry the incompletely dried composite particulate powder. After stirring and steaming, the graphene composite particles are loose and porous, so that moisture or absolute ethyl alcohol from the air can be easily absorbed. Therefore, the graphene composite particles need to be further evaporated to dryness under the freezing vacuum condition.
Further, the screening device 24 includes a large particle screening frame 26, a medium particle screening frame 27, a small particle screening frame 28 and a minimum particle collecting frame 29 which are sequentially stacked from top to bottom. The screening device 24 can select different screening nets according to experimental requirements and actual needs, and specific mesh number of each layer can be utilized. Because of the expression needs, the holes on the graph are not completely shown, and the holes are densely distributed in the real situation. After the screening is finished, the collecting plate 23 extends into each stage of screening frame, and the screening frame is taken out and finally collected by experimenters.
Further, the collecting system 5 comprises a carrier 22, the carrier 22 is provided with a slide rail 30, the slide rail 30 is slidably supported with a plurality of layers of collecting plates 23, and the collecting plates 23 can extend into the screening frame of the screening device 24.
Example 2:
the method for preparing the graphene composite particles by adopting the graphene composite particle preparation device comprises the following steps:
step one, adding raw materials: adding corresponding amounts of absolute ethyl alcohol, core particles and graphene powder into the absolute ethyl alcohol feeding device 6, the particle feeding device 7 and the graphene feeding device 8 respectively according to the mixing ratio;
step two, mixing and stirring the raw materials: feeding the prepared liquid and powder in the step one into a roller stirring device 2 after blanking, starting a first rotating motor 10 and a first ultrasonic motor 14 to drive corresponding stirring main shafts, longitudinally disturbing the particles through a longitudinal stirring strip 13 in the stirring process, transversely disturbing the particles through a transverse stirring plate 12, and fully dispersing the particles in an absolute ethyl alcohol solution;
step three, heating and evaporating the mixture which is preliminarily mixed and prepared to be uniform: opening a bin door plate 16 of a roller stirring device 2, putting the materials into an inner part of a stirring and drying outer barrel 19 of the stirring and drying device 3, starting a second ultrasonic motor 17 and a second rotating motor 18 to drive a central stirring shaft, driving a brush 21 through the central stirring shaft, and simultaneously starting a heating device, wherein the stirring and drying device 3 is used for drying absolute ethyl alcohol by distillation so as to separate out particles, and continuously scattering the particles in the stirring process to avoid particle agglomeration and ensure that the particles are uniformly distributed; the second ultrasonic motor 17 assists the loose-shaped brush 21 to break up the particles;
step four, vacuum freezing the evaporated material: after the graphene composite particles are stirred and evaporated by the stirring and evaporating device 3, due to the fact that the graphene composite particles are loose and porous, moisture or absolute ethyl alcohol from the air can be easily absorbed, and the graphene composite particles need to be evaporated by a vacuum drying system 25 under a freezing vacuum condition;
step five, screening the graphene composite particles: the graphene composite particles which are stirred and steamed to be dry are collected into a large particle screening plate 26, at the moment, screening plates at all levels start to shake and screen, and the particles sequentially flow through a medium particle screening frame 27, a small particle screening frame 28 and a minimum particle collecting frame 29;
step six, collecting the screened graphene composite particles: after the screening is finished, the collecting plate 23 is stretched into each stage of screening frame, and the screening frame is taken out and finally collected by experimenters.
Claims (5)
1. The method for preparing the graphene composite particles by adopting the graphene composite particle preparation device comprises a feeding device (1) for adding various raw materials, a roller stirring device (2) for stirring the raw materials is arranged under the feeding device (1), a stirring and evaporating device (3) is arranged under the roller stirring device (2), and a freeze drying and screening system (4) is arranged under the stirring and evaporating device (3);
the freeze drying and screening system (4) comprises a freeze drying device (25) and a screening device (24);
a collecting system (5) is arranged on the side surface of the freeze drying and screening system (4);
the drum stirring device (2) comprises a cabin body (11), a first rotating motor (10) and a first ultrasonic motor (14) are respectively installed on two outer side walls of the cabin body (11), a stirring main shaft is installed between main shafts of the first rotating motor (10) and the first ultrasonic motor (14), a longitudinal stirring strip (13) and a transverse stirring plate (12) are vertically fixed on the stirring main shaft, and a cabin door mechanism (15) for blanking is arranged at the bottom of the cabin body (11); the cabin door mechanism (15) adopts a symmetrical open type cabin door plate (16);
the stirring and drying device (3) comprises a stirring and drying outer barrel body (19), an inner container (20) is arranged inside the stirring and drying outer barrel body (19), and a heating device is arranged in an interlayer between the inner container (20) and the stirring and drying outer barrel body (19); a central stirring shaft is arranged at the central part of the stirring and drying outer cylinder body (19), the central stirring shaft is connected with a main shaft of a second rotating motor (18) for driving the central stirring shaft to rotate, a second ultrasonic motor (17) is arranged below the second rotating motor (18), and a brush (21) for stirring is arranged on the central stirring shaft;
the screening device (24) comprises a large particle screening frame (26), a medium particle screening frame (27), a small particle screening frame (28) and a minimum particle collecting frame (29) which are sequentially stacked from top to bottom;
the method is characterized in that: the preparation method comprises the following steps:
step one, adding raw materials: adding corresponding amounts of absolute ethyl alcohol, core particles and graphene powder into an absolute ethyl alcohol feeding device (6), a particle feeding device (7) and a graphene feeding device (8) respectively according to the mixing ratio;
step two, mixing and stirring the raw materials: feeding the prepared liquid and powder in the step one into a roller stirring device (2) after blanking, starting a first rotating motor (10) and a first ultrasonic motor (14) to drive corresponding stirring main shafts, longitudinally disturbing particles through a longitudinal stirring strip (13) and a transverse stirring plate (12) in the stirring process, and finally fully dispersing the particles in an absolute ethyl alcohol solution;
step three, heating and evaporating the mixture which is prepared uniformly by preliminary mixing: opening a bin door plate (16) of a roller stirring device (2), putting the materials into the stirring and drying outer barrel body (19) of the stirring and drying device (3), starting a second ultrasonic motor (17) and a second rotating motor (18) to drive a central stirring shaft, driving a brush (21) through the central stirring shaft, starting a heating device, and continuously scattering particles in the stirring process to avoid particle agglomeration and ensure that the particles are uniformly distributed, wherein the stirring and drying device (3) is used for drying absolute ethyl alcohol to dryness so as to separate out the particles; the second ultrasonic motor (17) assists the loose-shaped brush (21) to break up the particles;
step four, performing vacuum freezing on the evaporated material: after the graphene composite particles are stirred and evaporated by the stirring and evaporating device (3), the graphene composite particles can easily absorb water or absolute ethyl alcohol from the air due to the loose and porous structure of the graphene composite particles, and the graphene composite particles are evaporated by evaporation under a freezing vacuum condition by using a freezing and evaporating device (25);
step five, screening the graphene composite particles: the graphene composite particles which are stirred and steamed to be dry are collected into a large particle screening frame (26), at the moment, screening plates at all levels start to shake and screen, and the particles sequentially flow through a medium particle screening frame (27), a small particle screening frame (28) and a minimum particle collecting frame (29);
step six, collecting the screened graphene composite particles: after screening is finished, the collecting plate (23) is stretched into each stage of screening frame, and the screening frames are taken out and finally collected and used by experimenters.
2. The method for preparing graphene composite particles using the graphene composite particle preparation apparatus according to claim 1, wherein: feeding device (1) adopts compound reinforced structure, guarantees reinforced cylinder, reinforced cylinder is inside to separate into absolute ethyl alcohol feeding device (6), particle feeding device (7) and graphite alkene feeding device (8) through a plurality of baffles, and every feeding device's below all sets up corresponding opening for the raw materials that add fall into the inside of cylinder agitating unit (2).
3. The method for preparing graphene composite particles using the graphene composite particle preparation apparatus according to claim 1, wherein: the diameter of the stirring and drying outer cylinder (19) is larger than the opening size of a cabin door mechanism (15) of the drum stirring device (2);
the heating device adopts a water bath heating device, an electric heating device or an electromagnetic heating device;
the inner part of the stirring and evaporating outer barrel body (19) adopts a conical structure, and the inner container (20) adopts a detachable structure;
the hairbrush (21) adopts a fiber brush.
4. The method for preparing graphene composite particles using the graphene composite particle preparation apparatus according to claim 1, wherein: the freezing and drying device (25) adopts a freezing vacuum box structure; the top of freezing vacuum box structure is provided with spout (32), sliding fit has sealed apron (31) on spout (32).
5. The method for preparing graphene composite particles using the graphene composite particle preparation apparatus according to claim 1, wherein: the collecting system (5) comprises a bearing frame (22), sliding rails (30) are arranged on the bearing frame (22), a plurality of layers of collecting boards (23) are slidably supported on the sliding rails (30), and the collecting boards (23) can stretch into the interior of a screening frame of the screening device (24).
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| CN107955200A (en) * | 2017-11-29 | 2018-04-24 | 三峡大学 | A kind of graphene/organic matter composite particles and preparation method thereof |
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| US20200287207A1 (en) * | 2019-03-06 | 2020-09-10 | Nanotek Instruments, Inc. | Process for producing porous particulates of graphene shell-protected alkali metal, electrodes, and alkali metal battery |
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| CN106566963A (en) * | 2016-11-08 | 2017-04-19 | 中航装甲科技有限公司 | Preparation method and stirring device of aluminum alloy composite armor material |
| CN106513694A (en) * | 2016-12-14 | 2017-03-22 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of graphene/ metal composite powder |
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