CN217607995U - Low-temperature heat treatment device for graphene oxide heat-conducting film - Google Patents
Low-temperature heat treatment device for graphene oxide heat-conducting film Download PDFInfo
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- CN217607995U CN217607995U CN202221536942.8U CN202221536942U CN217607995U CN 217607995 U CN217607995 U CN 217607995U CN 202221536942 U CN202221536942 U CN 202221536942U CN 217607995 U CN217607995 U CN 217607995U
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Abstract
A low-temperature heat treatment device for a graphene oxide heat-conducting film comprises a heat-insulating cabin, wherein an insulating material layer is arranged at the bottom in the heat-insulating cabin; a plurality of layers of graphene oxide films to be pressed and a plurality of graphite plate interlayers are arranged in the heat-insulating cabin, and the graphene oxide films to be pressed and the graphite plate interlayers are alternately stacked in the vertical direction to form a cylindrical material pile; wherein the edge of the graphene oxide film to be pressed does not exceed the edge of the adjacent graphite plate interlayer; the left side and the right side of the cylindrical material pile are respectively and vertically provided with a first flexible graphite electrode and a second flexible graphite electrode, the two electrodes are both attached to the side edges of the graphite plate interlayers and are electrically conductive, and the two electrodes are respectively and electrically connected with the positive electrode and the negative electrode of a power supply mechanism. The device can realize the even heating of waiting to press the oxidation graphite alkene membrane.
Description
Technical Field
The utility model relates to a graphite alkene processing field especially relates to a low temperature heat treatment device of oxidation graphite alkene heat conduction membrane.
Background
The graphene oxide heat-conducting film is a novel heat-conducting material, and a low-temperature heat treatment process below 300 ℃ is a mainstream method for preparing the graphene oxide heat-conducting film at present; in the existing low-temperature heat treatment process, graphene oxide and a natural graphite plate are generally laminated in a jig and heated by infrared radiation or hot air convection.
However, when the two heating methods are adopted, the temperature rise process of the jig is from outside to inside, so that the temperature difference between the inside and the outside of the material is large in the process of low-temperature heat treatment, the temperature is not uniform, and finally the performance difference of the product is large; meanwhile, due to the requirement of uniform temperature in the treatment process, the heat preservation waiting time is also longer, so that the process time is long and the energy efficiency is low.
In view of the above problems, it is desirable to provide a low temperature heat treatment apparatus with uniform heating.
Disclosure of Invention
An object of the utility model is to provide a low temperature heat treatment device of oxidation graphite alkene heat conduction membrane.
The utility model adopts the technical proposal that: the low-temperature heat treatment device for the graphene oxide heat-conducting film comprises a heat-insulating cabin, wherein an insulating material layer is arranged at the bottom in the heat-insulating cabin;
a plurality of layers of graphene oxide films to be pressed and a plurality of graphite plate interlayers are arranged in the heat-insulating cabin, and the graphene oxide films to be pressed and the graphite plate interlayers are alternately stacked in the vertical direction to form a cylindrical material pile; wherein the edge of the graphene oxide film to be pressed does not exceed the edge of the adjacent graphite plate interlayer;
the left side and the right side of the cylindrical material pile are respectively and vertically provided with a first flexible graphite electrode and a second flexible graphite electrode, the two electrodes are both attached to the side edges of the graphite plate interlayers and are electrically conductive, and the two electrodes are respectively and electrically connected with the positive electrode and the negative electrode of a power supply mechanism.
The relevant content in the above technical solution is explained as follows:
1. in the above scheme, the device further comprises a pressure column head, wherein the pressure column head is arranged corresponding to the top surface of the cylindrical material pile, and provides vertical downward pressure for the cylindrical material pile during working.
2. In the above scheme, the upper end of the pressure column head is fixedly connected with a hydraulic piston of a hydraulic mechanism, so that the pressure column head is driven by hydraulic pressure.
3. In the above scheme, the hydraulic mechanism comprises an overpressure overflow mechanism.
4. In the above scheme, the power supply mechanism is a control unit, and the control unit controls the power supply to be switched on and off during work.
5. In the above scheme, the device further comprises a temperature sensor, the temperature sensor is arranged on the first flexible graphite electrode and/or the second flexible graphite electrode, and a signal output end of the temperature sensor is electrically connected with the control unit.
6. In the above scheme, the temperature sensor is an infrared thermometer.
7. In the above scheme, the heat preservation cabin comprises a base and a heat preservation interlayer arranged on the periphery and the top, wherein the heat preservation interlayer is a carbon felt.
8. In the scheme, the vertical projection patterns of the graphite plate interlayers are overlapped.
9. In the scheme, the graphite plate interlayer is an isostatic pressing graphite plate, and the thickness of the graphite plate interlayer is 0.3mm to 8mm.
The beneficial effects of the utility model reside in that: when the low-temperature heat treatment device for the graphene oxide heat-conducting film is used, the high conductivity and the high heat conductivity of the graphite plate interlayer are utilized, the flexible graphite electrode is used for directly electrifying and heating each graphite plate interlayer, and then the graphene oxide film to be pressed which is alternately stacked with each graphite plate interlayer is indirectly heated; under the design, on one hand, tens of layers of graphite plates are uniformly distributed in an electric field through the high electrical conductivity and the design of a parallel circuit, so that the problem of overlarge local power is avoided, and on the other hand, the high thermal conductivity of the graphite plates can further promote the uniformity of a thermal field, so that the graphene oxide film to be pressed is uniformly heated, the product performance is ensured, and the process time is shortened.
In addition, the graphene oxide film can emit moisture and small molecular gas in the low-temperature heat treatment process, so that the structure is loose, the order of the internal structure of the graphene oxide film is disturbed, and the product quality is influenced; according to the scheme, a hydraulic pressurization method is adopted, an electrified heating and high-pressure hydraulic connection mechanism is formed, on one hand, the low-temperature heat treatment process of the graphene oxide film can be uniformly, accurately and efficiently controlled, on the other hand, the expansion degree and the micro-order of the graphene oxide film are controlled, and the product quality is guaranteed.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a cross-sectional view of an embodiment of the present invention from a top view.
In the above drawings: 1. a heat-preservation cabin; 11. a layer of insulating material; 12. a base; 13. a heat insulation interlayer; 2. pressing the graphene oxide film; 3. a graphite plate interlayer; 4. a first flexible graphite electrode; 5. a second flexible graphite electrode; 6. a pressure column head; 7. a hydraulic piston; 8. a control unit; 9. and a temperature sensor.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.
The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another element or operation described in such technical terms.
As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.
As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.
As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this application, and in the special art. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.
The terms "front", "rear", "upper", "lower", "left" and "right" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the scope of protection and the actual direction of the present invention.
As shown in fig. 1 and 2, a low-temperature thermal treatment apparatus for a graphene oxide thermal conductive film is provided.
The device comprises a heat insulation cabin 1, wherein an insulating material layer 11 is arranged at the bottom in the heat insulation cabin 1, and the insulating material layer 11 can be made of insulating materials such as rubber, ceramics and the like; the graphene oxide film 2 to be pressed and the graphite plate interlayer 3 are arranged in the heat preservation cabin 1 in a multilayer mode, the graphene oxide film 2 to be pressed is a graphene oxide heat conduction film waiting for low-temperature heat treatment, and the graphene oxide film 2 to be pressed and the graphite plate interlayer 3 are alternately stacked in the vertical direction to form a cylindrical material pile.
The graphene oxide films 2 to be pressed and the graphite plate interlayers 3 are arranged in a staggered manner one by one, so that the adjacent graphite plate interlayers 3 are arranged above and below each graphene oxide film 2 to be pressed, and the heat conduction efficiency of the graphene oxide films 2 to be pressed is ensured.
The left side and the right side of the cylindrical material pile are respectively vertically provided with a first flexible graphite electrode 4 and a second flexible graphite electrode 5, the two electrodes are both attached to the side edges of the graphite plate interlayers 3 and are electrically conductive, and the two electrodes are respectively and electrically connected with the positive electrode and the negative electrode of a power supply mechanism.
The first flexible graphite electrode 4 and the second flexible graphite electrode 5 are made of flexible graphite materials and are supported by taking an aluminum alloy frame as a framework.
When the low-temperature heat treatment device for the graphene oxide heat-conducting film is used, the high conductivity and the high heat conductivity of the graphite plate interlayer 3 are utilized, the flexible graphite electrode directly carries out power-on heating on each graphite plate interlayer 3, and then the graphene oxide film 2 to be pressed which is alternately stacked with each graphite plate interlayer 3 is indirectly heated; under this design, on the one hand, tens of layers of graphite plates are through its high electric conductivity and parallel circuit's design for electric field distribution is more even, can not have the too big problem of local power, and on the other hand, the high thermal conductivity of graphite plate can further promote the homogeneity of thermal field, realizes waiting to press the even heating of oxidation graphite alkene membrane 2 from this, guarantees to produce the property ability, reduces process time.
In this embodiment, the vertical projection patterns of each graphite sheet partition 3 are overlapped, that is, the graphite sheet partitions have the same shape when viewed from the top, so that the first flexible graphite electrode 4 and the second flexible graphite electrode 5 can be conveniently attached to and contacted with the side edges of each graphite sheet partition 3, and particularly, it is preferable that each graphite sheet partition 3 has the same specification.
Wherein the graphite plate interlayer 3 is an isostatic pressing graphite plate, and the thickness range is between 0.3mm and 8 mm; the graphite plate prepared by the isostatic pressing process has high and uniform density, is not easy to deform, has high strength and good machinability, can greatly reduce the internal stress, is convenient to manufacture, has long service life and relatively low cost, and is suitable for being used in the scheme; the thickness range of 0.3mm to 8mm is suitable for the heat conduction and the electric conduction requirements in the scheme.
In addition, the edge of each graphene oxide film 2 to be pressed does not exceed the edge of the adjacent graphite plate interlayer 3, so that the contact between the first flexible graphite electrode 4 and the second flexible graphite electrode 5 with each graphite plate interlayer 3 is prevented from being influenced, and the part of the graphene oxide film 2 to be pressed, which is exposed out of the graphite plate interlayer 3, is prevented from being damaged.
In this embodiment, the device further comprises a pressure column head 6, wherein the pressure column head 6 is arranged corresponding to the top surface of the cylindrical material pile and provides vertical downward pressure to the cylindrical material pile during operation; the upper end of the pressure column head 6 is fixedly connected with a hydraulic piston 7 of a hydraulic mechanism, and the pressure column head 6 is driven by hydraulic pressure; the fixed connection of the pressure column head 6 and the hydraulic piston 7 can be selected from integral casting, bolt connection and the like.
Only a part of the hydraulic piston 7 is drawn in this hydraulic mechanism diagram.
The graphene oxide film can emit moisture and small molecular gas in the low-temperature heat treatment process, so that the structure is loose, the order of the internal structure of the graphene oxide film is disturbed, and the product quality is influenced; according to the scheme, a hydraulic pressurization method is adopted to form a power-on heating and high-pressure hydraulic connection mechanism, so that the low-temperature heat treatment process of the graphene oxide film can be uniformly, accurately and efficiently controlled on one hand, and meanwhile, the expansion degree and the micro-order of the graphene oxide film are controlled on the other hand, and the product quality is ensured.
Specifically, the maximum pressure of the hydraulic mechanism is 500kg, and the hydraulic mechanism further comprises an overpressure overflow mechanism, so that hydraulic oil is automatically discharged when the pressure exceeds a set value, and the actual pressure is ensured to be consistent with the set pressure; the overpressure overflow mechanism comprises a pressure gauge for monitoring hydraulic pressure, an electromagnetic valve for controlling hydraulic flow and a control module, and the specific structure and the working principle of the overpressure overflow mechanism are all in the prior art and are well known by persons skilled in the art and are not the point of the invention, so that the detailed description is omitted here.
In this embodiment, the power supply mechanism is a control unit 8, and the control unit 8 controls the power supply to be on and off during operation; the heating device is characterized by further comprising a temperature sensor 9, wherein the temperature sensor 9 is arranged on the first flexible graphite electrode 4 and the second flexible graphite electrode 5, a signal output end of the temperature sensor 9 is electrically connected with the control unit 8, and the control unit 8 can control power supply according to a monitoring structure of the temperature sensor 9 so as to control a heating process.
Wherein, the temperature sensor 9 is an infrared thermometer.
The control unit 8 is operative to provide a low voltage dc of 32V.
The specific structure and control logic of the control unit 8 are well known in the art and are not considered to be the point of the present invention, and therefore are not described herein again.
In this embodiment, the heat preservation cabin 1 includes base 12 and locates all around and the heat preservation interlayer 13 at top, heat preservation interlayer 13 is the carbon felt, and this kind of material keeps warm effectually, and the cost is lower, and simple to operate is suitable for this scheme to use.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a low temperature heat treatment device of graphite oxide alkene heat conduction membrane which characterized in that:
the insulation cabin comprises a heat insulation cabin (1), wherein an insulation material layer (11) is arranged at the bottom in the heat insulation cabin (1);
a plurality of graphene oxide films (2) to be pressed and a plurality of graphite plate interlayers (3) are arranged in the heat preservation cabin (1), and the graphene oxide films (2) to be pressed and the graphite plate interlayers (3) are alternately stacked in the vertical direction to form a cylindrical material stack; wherein the edge of the graphene oxide film (2) to be pressed does not exceed the edge of the adjacent graphite plate interlayer (3);
the left side and the right side of the cylindrical material pile are respectively and vertically provided with a first flexible graphite electrode (4) and a second flexible graphite electrode (5), the two electrodes are attached to the side edges of the graphite plate interlayers (3) to conduct electricity, and the two electrodes are respectively and electrically connected with the positive electrode and the negative electrode of a power supply mechanism.
2. The apparatus for low-temperature thermal treatment of graphene oxide thermal conductive film according to claim 1, wherein: the device is characterized by further comprising a pressure column head (6), wherein the pressure column head (6) is arranged corresponding to the top surface of the cylindrical material pile and provides vertical downward pressure for the cylindrical material pile during work.
3. The apparatus according to claim 2, wherein: the upper end of the pressure column head (6) is fixedly connected with a hydraulic piston (7) of a hydraulic mechanism, and the pressure column head (6) is driven by hydraulic pressure.
4. The apparatus according to claim 3, wherein: the hydraulic mechanism comprises an overpressure overflow mechanism.
5. The apparatus according to claim 1, wherein: the power supply mechanism is a control unit (8), and the control unit (8) controls the on-off of power supply in work.
6. The apparatus according to claim 5, wherein: the flexible graphite electrode structure is characterized by further comprising a temperature sensor (9), wherein the temperature sensor (9) is arranged on the first flexible graphite electrode (4) and/or the second flexible graphite electrode (5), and a signal output end of the temperature sensor (9) is electrically connected with the control unit (8).
7. The apparatus of claim 6, wherein: the temperature sensor (9) is an infrared thermometer.
8. The apparatus for low-temperature thermal treatment of graphene oxide thermal conductive film according to claim 1, wherein: the heat-preservation cabin (1) comprises a base (12) and a heat-preservation interlayer (13) arranged on the periphery and the top, wherein the heat-preservation interlayer (13) is a carbon felt.
9. The apparatus according to claim 1, wherein: the vertical projection patterns of the graphite plate interlayers (3) are overlapped.
10. The apparatus according to claim 1, wherein: the graphite plate interlayer (3) is an isostatic pressing graphite plate, and the thickness of the graphite plate interlayer is 0.3mm to 8mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221536942.8U CN217607995U (en) | 2022-06-17 | 2022-06-17 | Low-temperature heat treatment device for graphene oxide heat-conducting film |
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| CN202221536942.8U CN217607995U (en) | 2022-06-17 | 2022-06-17 | Low-temperature heat treatment device for graphene oxide heat-conducting film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115709988A (en) * | 2022-11-30 | 2023-02-24 | 广东墨睿科技有限公司 | Graphene superconducting film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115709988A (en) * | 2022-11-30 | 2023-02-24 | 广东墨睿科技有限公司 | Graphene superconducting film and preparation method thereof |
| CN115709988B (en) * | 2022-11-30 | 2024-01-26 | 广东墨睿科技有限公司 | Graphene superconducting film and preparation method thereof |
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