CN112742570B - A grinder for preparing boron nitride nanosheet - Google Patents
A grinder for preparing boron nitride nanosheet Download PDFInfo
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- CN112742570B CN112742570B CN202110024498.5A CN202110024498A CN112742570B CN 112742570 B CN112742570 B CN 112742570B CN 202110024498 A CN202110024498 A CN 202110024498A CN 112742570 B CN112742570 B CN 112742570B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a grinding device for preparing boron nitride nanosheets, and relates to the field of nano material preparation, wherein the grinding device comprises a material conveying structure, a grinding structure and an ultrasonic dispersion structure; the material conveying structure conveys materials to the grinding structure for grinding, and the materials enter the ultrasonic dispersion structure after grinding to be dispersed to obtain a product. Conveying the mixture of hexagonal boron nitride and hard particles to a material box through a material conveying belt, stripping the hexagonal boron nitride by using a grinding device, and finally obtaining the two-dimensional flaky boron nitride nanosheet through ultrasonic standing and drying. The device provided by the invention has the advantages of high yield, high automation degree, large size of the stripped nanosheet and the like.
Description
Technical Field
The invention relates to the field of nano material processing, in particular to a grinding device for preparing boron nitride nanosheets.
Background
The boron nitride nanosheet is a widely-applied 2D material, and has the characteristics of high thermal conductivity, low expansion coefficient, good high-temperature thermal insulation, stable chemical property, excellent lubricating property and the like. However, a method for efficiently producing boron nitride nanosheets is lacked at present, a mechanical ball milling method and an ultrasonic-assisted liquid phase stripping method are adopted in the traditional preparation process, but the boron nitride nanosheets prepared by the two methods are low in efficiency, complicated in process and difficult to realize industrial production, and meanwhile, the boron nitride nanosheets prepared by the two methods are small in size, and the quality of nanosheet structures is partially damaged. In view of this, it is necessary to develop an apparatus capable of efficiently and industrially producing boron nitride nanosheets.
Disclosure of Invention
The invention provides a grinding device for preparing boron nitride nanosheets, which is characterized in that through the arrangement of a disc with a through hole, a rotating shaft, a grinding head with a convex structure, an ultrasonic vibrator and other structures, on one hand, the complex process and a large amount of manual intervention of an ultrasonic-assisted liquid phase stripping method are avoided, the preparation efficiency is improved, on the other hand, the grinding head with the convex structure can be used for decomposing a compression force into a plurality of small shearing forces, so that the material is induced to be stripped more efficiently, the damage to the boron nitride nanosheet structure caused by the traditional ball milling collision is also avoided, and the quality of the prepared boron nitride nanosheets is improved.
A grinding device for preparing boron nitride nanosheets comprises a material conveying structure, a grinding structure and an ultrasonic dispersion structure; the material conveying structure conveys materials to the grinding structure for grinding, and the materials enter the ultrasonic dispersion structure after grinding to be dispersed to obtain a product.
Further, the grinding structure comprises a rotating shaft, a disc with a through hole and a grinding head; the rotating shaft can drive the perforated disc and the grinding head to rotate; when the material rotates along with the disk with the through hole, the material enters the grinding equipment body from the through hole of the disk with the through hole and is ground at the matching part of the grinding head and the grinding equipment body.
Furthermore, the grinding structure comprises a first rotating shaft, a second rotating shaft, a disc with a through hole and a grinding head; the first rotating shaft and the second rotating shaft respectively drive the disc with the through hole and the grinding head, when the first rotating shaft drives the disc with the through hole to rotate, materials enter the grinding equipment body from the through hole of the disc with the through hole, and the second rotating shaft drives the grinding head to grind the matched part of the grinding equipment body.
Furthermore, the grinding head is of a conical structure, a grinding groove is formed in the matching position of the grinding device main body and the grinding head, and the grinding groove is composed of a plurality of uniformly distributed bulges.
Furthermore, the through hole of the disc with the through hole is communicated with the input end of a material conveying pipeline, the output end of the material conveying pipeline is arranged at the main body of the grinding device, and materials enter the matching part of the grinding head and the main body of the grinding device through the material conveying pipeline.
Further, material conveying structure includes material conveyer belt and material storage platform, and material storage platform is provided with the band-pass hole disc in the material incasement through material conveyer belt transport material incasement, and the material case passes through material case fixed bolster support, and material case fixed bolster is installed on the stand, be provided with elevating gear on the stand, thereby elevating gear can drive the stand and translate from top to bottom and drive the band-pass hole disc in the material case and reciprocate for the band-pass hole disc drives the pivot and reciprocates.
Furthermore, the pressing force of the grinding head and the grinding equipment main body on the materials can be adjusted by adjusting the vertical position of the rotating shaft.
Furthermore, a timing switch is arranged on the material conveying pipeline and used for controlling the time of the material entering the grinding head.
Furthermore, a blanking hole is formed in the grinding equipment main body, and a timing switch is arranged on the blanking hole and used for controlling the time when the materials enter the ultrasonic dispersion structure.
Further, the ultrasonic dispersion structure comprises an ultrasonic oscillator and an ultrasonic oscillator conveyor belt; the ultrasonic oscillator conveying belts are used for sequentially transmitting the ultrasonic oscillators falling into the ground materials to set positions; and the ultrasonic oscillator is used for carrying out ultrasonic dispersion on the ground material for two hours and standing in deionized water for eight hours, so that the boron nitride nanosheet is obtained.
Compared with the prior art, the invention has the beneficial effects that:
1. the grinding head surface adopted in the device has the raised ripples and the non-smooth surface, and the raised ripples on the grinding head surface are used for converting macroscopic compression force into microscopic friction force during grinding, so that the shearing force on hexagonal boron nitride can be improved, the stripping rate of the hexagonal boron nitride is greatly increased, and the yield of boron nitride nanosheets is improved.
2. The device provided by the invention utilizes the grinding device for preparing the boron nitride nanosheets, and avoids the defects that the prepared boron nitride nanosheet material is small in size and the structure is damaged due to the traditional ball-milling impact.
3. The device can realize batch production of the boron nitride nanosheets, obtains the boron nitride nanosheets from the material conveying device, the grinding device to the ultrasonic oscillation device, has high automation degree, improves the production efficiency of the boron nitride nanosheets, and can realize batch production of the boron nitride nanosheets.
4. The grinding grooves on the inner surface of the grinding equipment main body are provided with raised ripples, so that the preparation of boron nitride nanosheets is facilitated, and the boron nitride nanosheets are matched with the working surface of the grinding head to extrude particles downwards during grinding.
5. The product structure is easy to realize, the operation and the maintenance are simple and convenient, the requirements on technical personnel are reduced, and the labor intensity of workers can be reduced in practical application.
6. When the grinding head and the disc with the through hole are arranged on the same rotating shaft, the distance between the grinding head and the grinding main body equipment can be adjusted by adjusting the position of the disc with the through hole, so that the pressing force of the grinding material is adjusted, the structure is convenient to operate, simple in structure and space-saving; meanwhile, the grinding head and the disc with the through hole work simultaneously, and the blanking time is controlled by setting a time switch, so that the blanking accuracy is improved, and the material is ground more uniformly. When the grinding head and the disc with the through hole are arranged on the two rotating shafts, the grinding head and the disc with the through hole respectively work independently, the working state can be adjusted according to actual working requirements, and intelligent management is facilitated.
7. The grinding head has replaceability, and the size and the clearance distance of the convex structure on the surface of different grinding heads are different, so that different grinding heads can be selected according to different sizes of material particles to achieve the optimal grinding effect.
Drawings
FIG. 1 is a schematic view of the general assembly of the apparatus of the present invention;
FIG. 2 is a detail view of a disk with through holes of the apparatus of the present invention;
FIG. 3 is a schematic view of a polishing groove structure of the apparatus of the present invention;
FIG. 4 is a schematic diagram of the conveyor belt control of the apparatus of the present invention.
The reference numbers are as follows:
1-a material storage platform; 2-a first induction variable speed motor; 3-a baffle plate; 4-a support frame; 5-a main electric box; 6-material conveying belt; 7-a second induction variable speed motor; 8-a material box; 9-a rotating shaft; 10-drive bevel gear; 11-a cross beam; 12-a rotating shaft; 13-a third induction variable speed motor; 14-material box fixing support; 15-upright post; 16-a lifting device; no. 17-1 infrared sensor; infrared sensor number 18-2; 19-a disk with through holes; 20-driven bevel gear; 21-a first via; 22-a material conveying pipeline; 23-ultrasonic oscillator; 24-a blanking hole; 25-a conveyor belt of an ultrasonic oscillator; 26-grinding equipment body, 27-grinding head; 28-grinding groove.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientation or positional relationship shown in the figures, and are used for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
a grinding device for preparing boron nitride nanosheets comprises a material conveying structure, a grinding structure and an ultrasonic dispersion structure; the material conveying structure conveys the material to the grinding structure for grinding, and the material enters the ultrasonic dispersion structure for dispersion after grinding to obtain a product; the grinding structure comprises a rotating shaft 9, a disc 19 with a through hole and a grinding head 27; the rotating shaft 9 can drive the perforated disc 19 and the grinding head 27 to rotate; when the material rotates along with the disk 19 with the through hole, the material enters the grinding device body 26 from the through hole of the disk 19 with the through hole and is ground at the matching part of the grinding head 27 and the grinding device body 26; the through hole of the disk 19 with the through hole is communicated with the input end of a material conveying pipeline 22, the output end of the material conveying pipeline 22 is arranged at the grinding device main body 26, and materials enter the matching part of the grinding head 27 and the grinding device main body 26 through the material conveying pipeline 22.
The grinding head 27 is a conical structure, and a grinding groove 28 is formed in the grinding device body 26 at the position where the grinding head 27 is matched with the grinding device body, and the grinding groove 28 is composed of a plurality of uniformly distributed protrusions. The surfaces of the grinding groove and the grinding head are provided with raised ripples and non-smooth surfaces, so that the shearing force to the hexagonal boron nitride can be improved during grinding, the stripping rate of the hexagonal boron nitride is greatly increased, and the yield of boron nitride nanosheets is improved.
The material conveying structure comprises a material conveying belt 6 and a material storage platform 1, the material storage platform 1 is conveyed to a material box 8 through the material conveying belt 6, a disc 19 with a through hole is arranged in the material box 8, the material box 8 is supported through a material box fixing support 14, the material box fixing support 14 is installed on a stand column 15, a lifting device 16 is arranged on the stand column 15, and the lifting device 16 can drive the stand column 15 to move up and down to drive the disc 19 with the through hole in the material box 8 to move up and down, so that the disc 19 with the through hole drives a rotating shaft 9 to move up and down.
The pressing force of the grinding head 27 and the grinding equipment main body 26 on the materials can be adjusted by adjusting the vertical position of the rotating shaft 9; the material conveying pipeline 22 is provided with a timing switch for controlling the time for the material to enter the grinding head 27; the grinding device main body 26 is also provided with a blanking hole 24, and the blanking hole 24 is provided with a timing switch for controlling the time of the material entering the ultrasonic dispersion structure.
The ultrasonic dispersion structure comprises an ultrasonic oscillator 23 and an ultrasonic oscillator conveyor belt 25; the ultrasonic oscillators 23 are arranged on an ultrasonic oscillator conveyor belt 25, and the ultrasonic oscillator conveyor belt 25 is used for sequentially transmitting the ultrasonic oscillators 23 falling into the ground material to a set position; the ultrasonic oscillator 23 is used for performing ultrasonic dispersion on the ground material for two hours, and standing in deionized water for eight hours, so as to obtain the boron nitride nanosheet.
The mixture of hexagonal boron nitride and hard particles on the material storage platform 1 is put into the material box 8 for standby use through the material conveying belt 6, the infrared sensor 17 No. 1 in the material box 8 has a monitoring effect on the mixture particles in the material box 8 to prevent excessive mixture particles in the material box 8 from contacting the driving bevel gear 10 and interfering transmission with the driven bevel gear 20, the infrared sensor 18 No. 2 has a detection effect on the minimum amount of particles in the material box 8, when the particles in the material box are used up, the particles are supplemented into the material box in time, the bracket 4 has an auxiliary supporting effect on the material conveying belt 6 in the conveying process, the baffle 3 on the material conveying belt 6 has a protective effect on the mixture particles to prevent the mixture particles from falling off from the side due to interference in the conveying process, the first induction variable speed motor 2 and the second induction variable speed motor 7 are matched to control the conveying speed (0.3-0.7 m/s) of the conveying belt, the first induction variable speed motor 2 and the second induction variable speed motor 7 are controlled by the main electric box 5; before the grinding starts, the lifting device 16 and the auxiliary device material box fixing support 14 are used for controlling the grinding head 27 to move up and down to generate downward pressure on mixture particles, so that the grinding efficiency is increased, and in addition, the grinding head 27 is in a conical structure, so that the grinding efficiency and precision are further increased; the third induction variable speed motor 13 rotates to drive the rotating shaft 12 to rotate, the driving bevel gear 10 on the rotating shaft 12 rotates, the axial rotation of the third induction variable speed motor 13 is converted into the axial rotation of the grinding head 27 through the matching with the driven bevel gear 20, the through hole disc 19 and the grinding head 27 which are connected through the key slot on the rotating shaft 9 rotate together with the rotation of the rotating shaft 9, wherein the through hole disc 19 is connected with the rotating shaft 9 through the key slot and is separated from the bottom plate of the material box by a certain distance to reduce the friction during the rotation; when the first through hole 21 and the material conveying pipeline inlet 22 are overlapped, the mixture of hexagonal boron nitride and hard particles enters the material conveying pipeline 22, passes through the material conveying pipeline 22 and enters the grinding groove 28 to start grinding, the mixture is conveyed downwards while being ground by matching with the grinding equipment main body 26 in the rotating process of the grinding head 27, enters the ultrasonic oscillator through the blanking hole 24 after the grinding is finished, the ground mixture is subjected to ultrasonic dispersion for two hours, then stands in deionized water for eight hours and is conveyed to a technician through the ultrasonic oscillator conveyor belt 25, the upper layer is taken out and dried, and the boron nitride nanosheet is prepared.
Because the rotating shaft 9 drives the disc 19 with the through hole and the grinding head 27 at the same time, the disc 19 with the through hole and the grinding head 27 must work at the same time, in order to make the grinding effect of the grinding head 27 on the materials consistent, the blanking time of the disc 19 with the through hole needs to be controlled, so the blanking time of the disc 19 with the through hole is realized by setting a timing switch, the disc 19 with the through hole does not discharge materials in a certain time, the grinding effect of the grinding head 27 on the materials can be ensured, and similarly, in order to ensure the ultrasonic dispersion effect, the materials ground by the grinding head 27 also need to fall into different ultrasonic oscillators 23 at regular time.
Example two:
the difference from the first embodiment is as follows: the grinding structure comprises a first rotating shaft, a second rotating shaft, a disc 19 with a through hole and a grinding head 27; the first rotating shaft and the second rotating shaft respectively drive the disk 19 with the through hole and the grinding head 27, when the first rotating shaft drives the disk 19 with the through hole to rotate, materials enter the grinding device main body 26 from the through hole of the disk 19 with the through hole, and the second rotating shaft drives the grinding head 27 to grind the matched part of the grinding device main body 26; the purpose of this arrangement is to control the disc with through holes 19 and the grinding head 27 separately, for example, when the disc with through holes 19 works, the grinding head 27 does not work, and vice versa, by arranging the first rotating shaft and the second rotating shaft, the disc with through holes 19 and the grinding head 27 do not need to work simultaneously, and the grinding quality is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (3)
1. A grinding device for preparing boron nitride nanosheets is characterized by comprising a material conveying structure, a grinding structure and an ultrasonic dispersion structure; the material conveying structure conveys the material to the grinding structure for grinding, and the material enters the ultrasonic dispersion structure for dispersion after grinding to obtain a product;
the grinding structure comprises a rotating shaft (9), a disc (19) with a through hole and a grinding head (27); the rotating shaft (9) can drive the disc (19) with the through hole and the grinding head (27) to rotate; when the material rotates along with the disc (19) with the through hole, the material enters the grinding equipment main body (26) from the through hole of the disc (19) with the through hole and is ground at the matching part of the grinding head (27) and the grinding equipment main body (26); or the grinding structure comprises a first rotating shaft, a second rotating shaft, a disc (19) with a through hole and a grinding head (27); the first rotating shaft and the second rotating shaft respectively drive the disc (19) with the through hole and the grinding head (27) to rotate, when the first rotating shaft drives the disc (19) with the through hole to rotate, materials enter the grinding equipment main body (26) from the through hole of the disc (19) with the through hole, the second rotating shaft drives the grinding head (27) to rotate, and grinding is carried out at the matching part of the grinding head (27) and the grinding equipment main body (26);
the grinding head (27) is of a conical structure, a grinding groove (28) is formed in the matching position of the grinding device main body (26) and the grinding head (27), and the grinding groove (28) is composed of a plurality of uniformly distributed bulges; the through hole of the disc (19) with the through hole is communicated with the input end of a material conveying pipeline (22), the output end of the material conveying pipeline (22) is arranged at the position of the grinding equipment main body (26), and materials enter the matching position of the grinding head (27) and the grinding equipment main body (26) through the material conveying pipeline (22);
the material conveying structure comprises a material conveying belt (6) and a material storage platform (1), the material storage platform (1) is conveyed into a material box (8) through the material conveying belt (6), a disc with a through hole (19) is arranged in the material box (8), the material box (8) is supported through a material box fixing support (14), the material box fixing support (14) is installed on an upright post (15), a lifting device (16) is arranged on the upright post (15), and the lifting device (16) can drive the upright post (15) to move up and down to drive the disc with the through hole (19) in the material box (8) to move up and down, so that the disc with the through hole (19) drives a rotating shaft (9) to move up and down; the pressing force of the grinding head (27) and the grinding equipment main body (26) on the materials can be adjusted by adjusting the vertical position of the rotating shaft (9);
the ultrasonic dispersion structure comprises an ultrasonic oscillator (23) and an ultrasonic oscillator conveyor belt (25); the ultrasonic oscillators (23) are arranged on an ultrasonic oscillator conveyor belt (25), and the ultrasonic oscillator conveyor belt (25) is used for sequentially transmitting the ultrasonic oscillators (23) falling into the ground material to a set position; and the ultrasonic oscillator (23) is used for carrying out ultrasonic dispersion on the ground material for two hours and standing in deionized water for eight hours, so that the boron nitride nanosheet is obtained.
2. The grinding device for preparing boron nitride nanosheets of claim 1, wherein the material conveying pipe (22) is provided with a timing switch for controlling the time for which material enters the grinding head (27).
3. The grinding device for preparing boron nitride nanosheets according to claim 1, wherein the grinding apparatus main body (26) is further provided with a blanking hole (24), and the blanking hole (24) is provided with a timing switch for controlling the time for the material to enter the ultrasonic dispersion structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110024498.5A CN112742570B (en) | 2021-01-08 | 2021-01-08 | A grinder for preparing boron nitride nanosheet |
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| CN202110024498.5A CN112742570B (en) | 2021-01-08 | 2021-01-08 | A grinder for preparing boron nitride nanosheet |
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| CN112742570B true CN112742570B (en) | 2022-05-17 |
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| KR101049781B1 (en) * | 2008-11-10 | 2011-07-19 | 주식회사 제이오 | Integrated Grinding Dispersion System for Dispersion of Carbon Nanotubes |
| CN107163290B (en) * | 2017-05-18 | 2019-08-23 | 清华-伯克利深圳学院筹备办公室 | A kind of functionalization hexagonal boron nitride nanosheet, dispersion liquid and its preparation method and application |
| CN109718923A (en) * | 2017-10-31 | 2019-05-07 | 北方奥钛纳米技术有限公司 | Ultrasonic grinding device |
| CN210207135U (en) * | 2019-04-30 | 2020-03-31 | 烟台恒诺新材料有限公司 | Multi-stage grinding equipment for multilayer graphite microchip coating additive |
| CN211329618U (en) * | 2019-11-06 | 2020-08-25 | 广州同心源生物科技有限公司 | Can reduce ejection of compact temperature's fodder grinder |
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