CN111908460A - Preparation method of highly ordered and compact graphene heat-conducting film - Google Patents
Preparation method of highly ordered and compact graphene heat-conducting film Download PDFInfo
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- CN111908460A CN111908460A CN202010642939.3A CN202010642939A CN111908460A CN 111908460 A CN111908460 A CN 111908460A CN 202010642939 A CN202010642939 A CN 202010642939A CN 111908460 A CN111908460 A CN 111908460A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
- C01B32/192—Preparation by exfoliation starting from graphitic oxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/20—Graphene characterized by its properties
- C01B2204/24—Thermal properties
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/20—Graphene characterized by its properties
- C01B2204/32—Size or surface area
Abstract
The invention discloses a preparation method of a highly ordered and compact graphene heat-conducting film, which comprises the following steps: s1, carrying out high-speed centrifugal concentration on a low-concentration Graphene Oxide (GO) solution to prepare nematic phase liquid crystal graphene oxide; s2, mixing reduced graphene oxide (rGO) powder with S1 to prepare colloid; s3, preparing an rGO/GO membrane from an S2 colloid, and according to the preparation method of the highly ordered and dense graphene heat conduction membrane, a small part of rGO sheets with very small diameters are added before membrane preparation to fill gaps in the large sheet diameter of GO, in addition, pressure is applied after heat treatment or in the heat treatment process, the density of the GO membrane is further improved, industrial mass production is guaranteed by adopting a calendering treatment mode after heat treatment, secondary high-temperature treatment is carried out on a sample after calendering treatment to repair defects in crystal lattices, and therefore the graphene heat conduction membrane with thin size, high heat conductivity and flexibility is obtained, the heat conductivity of the graphene heat conduction membrane reaches 2025W/k.m, and the thickness of the membrane can be 2-100 micrometers.
Description
Technical Field
The invention relates to the technical field of heat management materials, in particular to a preparation method of a highly ordered and compact graphene heat-conducting film.
Background
With the miniaturization and integration of electronic products, space limitation is higher and more, and the use of large heat sinks is more difficult, so that a heat sink with a thin size, high thermal conductivity and flexibility is required for effective heat dissipation management, graphene suspended in a single layer has high thermal conductivity exceeding 5000W/m.k, but is not suitable for use as a heat dissipation material, and currently, flexible heat conductive films for industrialization mainly rely on flexible pyrolytic graphite or graphitized polyimide, and the highest thermal conductivity in the plane is 1950W/m.k.
The graphene oxide is an oxide of graphene, and a large number of oxygen-containing functional groups such as hydroxyl carboxyl and the like are introduced on the surface and the edge of the graphene oxide, so that the graphene oxide can exist stably in an aqueous solution and a polar solvent, the prepared solution can be manufactured into a film through various technologies (including vacuum filtration, spray coating, bar coating, electrochemical deposition and shearing arrangement), but the structure of sp2 hybridized carbon is damaged by the oxidized graphene, so that the thermal conductivity and the electrical conductivity are extremely low, the functional groups can be removed through reduction, and particularly the sp2 ring structure of the graphene can be recovered through high-temperature graphitization.
Disclosure of Invention
The invention aims to provide a preparation method of a highly ordered and dense graphene heat-conducting film, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a highly ordered and dense graphene heat-conducting film comprises the following steps:
s1, carrying out high-speed centrifugal concentration on a low-concentration Graphene Oxide (GO) solution to prepare nematic phase liquid crystal graphene oxide;
s2, mixing reduced graphene oxide (rGO) powder with S1 to prepare colloid;
s3, preparing an rGO/GO membrane from the S2 colloid;
s4, carrying out heat treatment on the film prepared in the S3;
s5, rolling the film subjected to the S4 heat treatment, and then carrying out secondary heat treatment.
Preferably, the concentration of Graphene Oxide (GO) with low concentration in S1 is 10 mg/mL.
Preferably, the high-speed centrifugation condition in S1 is 25000rpm of rotation speed, and the centrifugation time is 20 min.
Preferably, the concentration of GO in S1 is about 50mg/mL after concentration.
Preferably, the nematic liquid crystal GO in S1 is a pseudoplastic fluid.
Preferably, the C/O ratio of rGO powder in S2 is about 12: 8.
preferably, the rGO content in the rGO/GO colloid in S2 is 0.5-2.5%.
Preferably, the rGO/GO colloid preparation in S2 was ground using a mortar for 10 min.
Preferably, the preparation technology of the rGO/GO membrane in the S3 is vacuum filtration, tape casting and screen printing.
Preferably, the rGO/GO membrane in S3 is prepared by vacuum drying at 100 ℃ for 2 h.
Preferably, the heat treatment of the film in S4 is carbonization and graphitization.
Preferably, the carbonization temperature of the heat treatment is 1000 ℃, the heating rate is 1 ℃/min in a quartz tube in the atmosphere of argon (200sccm, 1atm), the temperature is raised to 1000 ℃, the temperature is kept for 2h, and then the product is naturally cooled.
Preferably, the heat treatment graphitization temperature is 3000 ℃, the temperature rise rate is divided into three stages in a graphite furnace and in an argon (200L/hr) atmosphere.
Preferably, the three temperature-rise rate stages of graphitization are as follows: in the first stage, the temperature is between normal temperature and 1200 ℃, and the heating rate is 15 ℃/min; the second stage is 1200 ℃ and 2700 ℃, and the temperature rise rate is 10 ℃/min; in the third stage 2700-.
Preferably, the rolling device in S5 is a twin roll machine, and the pressure is 4 tons.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a small part of rGO sheet with very small diameter is added before the film is prepared to fill the gap in the large diameter of GO sheet, so that the density of the heat-conducting film is prevented from being influenced by the density, internal lattice arrangement and the like of the heat-conducting film, in addition, the density of the GO film is further improved by applying pressure after heat treatment or in the heat treatment process, and in consideration of the industrial mass production requirement, calendering treatment after heat treatment is adopted, but defects can be introduced into the crystal lattice after calendering treatment, so that secondary high-temperature treatment is carried out on a sample to repair the defects in the crystal lattice, and thus, the graphene heat-conducting film with thin size, high heat conductivity and flexibility is obtained, the heat conductivity reaches 2025W/k.m, and the thickness of the film can be 2-100 micrometers.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
S1, centrifuging a Graphene Oxide (GO) solution of 10mg/mL at 25000rpm at a high speed for 20min, pouring off supernatant, and concentrating to prepare graphene oxide with nematic liquid crystal phase of about 50 mg/mL;
s2, adding reduced graphene oxide (rGO) powder into S1 according to the proportion of 0.5%, grinding the mixture by using a mortar for 10min, and mixing to prepare rGO/GO colloid;
s3, preparing the colloid prepared in the S2 into an rGO/GO membrane by adopting a tape casting forming method, and drying the rGO/GO membrane in a vacuum drying oven at 100 ℃ for 2 hours;
s4, placing the film prepared in S3 into a quartz tube, heating to 1000 ℃ at a heating rate of 1 ℃/min under an argon (200sccm, 1atm) atmosphere, preserving heat for 2h, and naturally cooling.
S5, graphitizing the carbonized film of S4 in a graphite furnace, and heating to 3000 ℃ in three stages in an argon (200L/hr) atmosphere.
In the first stage, the temperature is between normal temperature and 1200 ℃, and the heating rate is 15 ℃/min; the second stage is 1200 ℃ and 2700 ℃, and the temperature rise rate is 10 ℃/min; in the third stage 2700-.
S6, rolling the graphitized film of S5 with a roll mill under a pressure of 4 tons.
S7, carrying out secondary graphitization treatment on the film after the rolling of S6 under the same treatment conditions as S5.
S8, the in-plane thermal conductivity of the obtained highly ordered and dense graphene thermal conductive film is 1000W/k.m.
Example 2
S1, centrifuging a Graphene Oxide (GO) solution of 10mg/mL at 25000rpm at a high speed for 20min, pouring off supernatant, and concentrating to prepare graphene oxide with nematic liquid crystal phase of about 50 mg/mL;
s2, adding reduced graphene oxide (rGO) powder into S1 according to the proportion of 1.5%, grinding the mixture by using a mortar for 10min, and mixing to prepare rGO/GO colloid;
s3, preparing the colloid prepared in the S2 into an rGO/GO membrane by adopting a tape casting forming method, and drying the rGO/GO membrane in a vacuum drying oven at 100 ℃ for 2 hours;
s4, placing the film prepared in S3 into a quartz tube, heating to 1000 ℃ at a heating rate of 1 ℃/min under an argon (200sccm, 1atm) atmosphere, preserving heat for 2h, and naturally cooling.
S5, graphitizing the carbonized film of S4 in a graphite furnace, and heating to 3000 ℃ in three stages in an argon (200L/hr) atmosphere.
In the first stage, the temperature is between normal temperature and 1200 ℃, and the heating rate is 15 ℃/min; the second stage is 1200 ℃ and 2700 ℃, and the temperature rise rate is 10 ℃/min; in the third stage 2700-.
S6, rolling the graphitized film of S5 with a roll mill under a pressure of 4 tons.
S7, carrying out secondary graphitization treatment on the film after the rolling of S6 under the same treatment conditions as S5.
S8, the in-plane thermal conductivity of the obtained highly ordered and dense graphene thermal conductive film is 2025W/k.m.
Example 3
S1, centrifuging a Graphene Oxide (GO) solution of 10mg/mL at a high speed of 25000rpm for 20min, pouring off supernatant, and concentrating to prepare graphene oxide with nematic liquid crystal phase of about 50 mg/mL;
s2, adding reduced graphene oxide (rGO) powder into S1 according to the proportion of 2.0%, grinding the mixture by using a mortar for 10min, and mixing to prepare rGO/GO colloid;
s3, preparing the colloid prepared in the S2 into an rGO/GO membrane by adopting a tape casting forming method, and drying the rGO/GO membrane in a vacuum drying oven at 100 ℃ for 2 hours;
s4, placing the film prepared in S3 into a quartz tube, heating to 1000 ℃ at a heating rate of 1 ℃/min under an argon (200sccm, 1atm) atmosphere, preserving heat for 2h, and naturally cooling.
S5, graphitizing the carbonized film of S4 in a graphite furnace, and heating to 3000 ℃ in three stages in an argon (200L/hr) atmosphere.
In the first stage, the temperature is between normal temperature and 1200 ℃, and the heating rate is 15 ℃/min; the second stage is 1200 ℃ and 2700 ℃, and the temperature rise rate is 10 ℃/min; in the third stage 2700-.
S6, rolling the graphitized film of S5 with a roll mill under a pressure of 4 tons.
S7, carrying out secondary graphitization treatment on the film after the rolling of S6 under the same treatment conditions as S5.
S8, the in-plane thermal conductivity of the obtained highly ordered and dense graphene thermal conductive film is 1500W/k.m.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (15)
1. A preparation method of a highly ordered and dense graphene heat-conducting film comprises the following steps:
s1, carrying out high-speed centrifugal concentration on a low-concentration Graphene Oxide (GO) solution to prepare nematic phase liquid crystal graphene oxide;
s2, mixing reduced graphene oxide (rGO) powder with S1 to prepare colloid;
s3, preparing an rGO/GO membrane from the S2 colloid;
s4, carrying out heat treatment on the film prepared in the S3;
s5, rolling the film subjected to the S4 heat treatment, and then carrying out secondary heat treatment.
2. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the concentration of the low-concentration Graphene Oxide (GO) in S1 is 10 mg/mL.
3. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: in S1, the high speed centrifugation condition is 25000rpm and the centrifugation time is 20 min.
4. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the concentration of GO in S1 was about 50mg/mL after concentration.
5. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: nematic liquid crystal GO in S1 is a pseudoplastic fluid.
6. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the C/O ratio of rGO powder in S2 is about 12: 8.
7. the method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: in the rGO/GO colloid in S2, the rGO content is 0.5-2.5%.
8. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: rGO/GO colloid preparation in S2 was ground using a mortar for 10 min.
9. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the preparation technology of the rGO/GO membrane in the S3 comprises vacuum filtration, tape casting and screen printing.
10. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the rGO/GO membrane in S3 is prepared by vacuum drying for 2h at 100 ℃.
11. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: the heat treatment of the film in S4 is carbonization and graphitization.
12. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 11, wherein: the carbonization temperature of the heat treatment is 1000 ℃, the heating rate is 1 ℃/min in a quartz tube under the atmosphere of argon (200sccm, 1atm), the temperature is raised to 1000 ℃, the temperature is kept for 2h, and then the product is naturally cooled.
13. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 12, wherein: the heat treatment graphitization temperature is 3000 ℃, the temperature rise rate is divided into three stages in a graphite furnace in argon (200L/hr) atmosphere.
14. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 13, wherein: the three temperature-rise rate stages of graphitization are as follows: in the first stage, the temperature is between normal temperature and 1200 ℃, and the heating rate is 15 ℃/min; the second stage is 1200 ℃ and 2700 ℃, and the temperature rise rate is 10 ℃/min; in the third stage 2700-.
15. The method for preparing a highly ordered and dense graphene thermal conductive film according to claim 1, wherein: in S5, the rolling equipment is a double-roll machine, and the pressure is 4 tons.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277503A (en) * | 2021-05-28 | 2021-08-20 | 常州第六元素材料科技股份有限公司 | Preparation method of reduced graphene oxide and graphene heat-conducting film |
| CN114988397A (en) * | 2022-06-08 | 2022-09-02 | 江苏斯迪克新材料科技股份有限公司 | Preparation method of highly-ordered and compact graphene heat-conducting film |
| CN116675221A (en) * | 2023-06-01 | 2023-09-01 | 南京工业大学 | Graphene film with high electrical conductivity and high thermal conductivity as well as preparation method and application thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104354447A (en) * | 2014-11-19 | 2015-02-18 | 江苏悦达新材料科技有限公司 | Preparation method of novel graphene composite heat conduction film |
| CN104592950A (en) * | 2014-12-26 | 2015-05-06 | 苏州格瑞丰纳米科技有限公司 | High-thermal conductivity graphite alkenyl polymer heat conducting film and preparation method thereof |
| CN109181654A (en) * | 2018-09-13 | 2019-01-11 | 江苏成康石墨烯科技有限公司 | A kind of graphene-based composite heat conduction film and preparation method thereof and its application |
| CN109467078A (en) * | 2017-09-07 | 2019-03-15 | 常州富烯科技股份有限公司 | Graphene heat conducting film and preparation method thereof, production equipment |
| CN109824033A (en) * | 2019-03-06 | 2019-05-31 | 华南理工大学 | A kind of method of low cost preparation high thermal conductivity graphene film |
| CN109912912A (en) * | 2019-03-06 | 2019-06-21 | 东华大学 | A kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its preparation and application |
| CN110482537A (en) * | 2019-09-10 | 2019-11-22 | 北京中石伟业科技无锡有限公司 | A kind of dispersing agent and its application that can moderately reduce graphene oxide slurry viscosity |
| CN110668434A (en) * | 2019-11-29 | 2020-01-10 | 苏州世华新材料科技股份有限公司 | Heat-conducting graphene film with adjustable vertical and in-plane heat conductivity coefficients and preparation method thereof |
| CN106520079B (en) * | 2015-09-11 | 2020-05-08 | 徐海波 | Graphene heat-conducting film and preparation method thereof |
-
2020
- 2020-07-06 CN CN202010642939.3A patent/CN111908460A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104354447A (en) * | 2014-11-19 | 2015-02-18 | 江苏悦达新材料科技有限公司 | Preparation method of novel graphene composite heat conduction film |
| CN104592950A (en) * | 2014-12-26 | 2015-05-06 | 苏州格瑞丰纳米科技有限公司 | High-thermal conductivity graphite alkenyl polymer heat conducting film and preparation method thereof |
| CN106520079B (en) * | 2015-09-11 | 2020-05-08 | 徐海波 | Graphene heat-conducting film and preparation method thereof |
| CN109467078A (en) * | 2017-09-07 | 2019-03-15 | 常州富烯科技股份有限公司 | Graphene heat conducting film and preparation method thereof, production equipment |
| CN109181654A (en) * | 2018-09-13 | 2019-01-11 | 江苏成康石墨烯科技有限公司 | A kind of graphene-based composite heat conduction film and preparation method thereof and its application |
| CN109824033A (en) * | 2019-03-06 | 2019-05-31 | 华南理工大学 | A kind of method of low cost preparation high thermal conductivity graphene film |
| CN109912912A (en) * | 2019-03-06 | 2019-06-21 | 东华大学 | A kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its preparation and application |
| CN110482537A (en) * | 2019-09-10 | 2019-11-22 | 北京中石伟业科技无锡有限公司 | A kind of dispersing agent and its application that can moderately reduce graphene oxide slurry viscosity |
| CN110668434A (en) * | 2019-11-29 | 2020-01-10 | 苏州世华新材料科技股份有限公司 | Heat-conducting graphene film with adjustable vertical and in-plane heat conductivity coefficients and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| ABOZAR AKBARI ET AL.: "Highly Ordered and Dense Thermally", 《MATTER》 * |
| 樊春雷: "石墨烯基柔性导热材料的制备及导热性能的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277503A (en) * | 2021-05-28 | 2021-08-20 | 常州第六元素材料科技股份有限公司 | Preparation method of reduced graphene oxide and graphene heat-conducting film |
| CN114988397A (en) * | 2022-06-08 | 2022-09-02 | 江苏斯迪克新材料科技股份有限公司 | Preparation method of highly-ordered and compact graphene heat-conducting film |
| CN116675221A (en) * | 2023-06-01 | 2023-09-01 | 南京工业大学 | Graphene film with high electrical conductivity and high thermal conductivity as well as preparation method and application thereof |
| CN116675221B (en) * | 2023-06-01 | 2024-04-09 | 南京工业大学 | Graphene film with high electrical conductivity and high thermal conductivity as well as preparation method and application thereof |
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