CN109912912A - A kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its preparation and application - Google Patents
A kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its preparation and application Download PDFInfo
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Abstract
The present invention relates to a kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its preparations and application, including fluorinated graphene nanometer sheet and polyvinyl alcohol.Preparation: polyvinyl alcohol/fluorinated graphene uniform dispersion is made into fluorinated graphene nanometer sheet orderly accumulation on basement membrane by depressurizing aided filter membrane formation process.The fluorinated graphene composite membrane obtained by this method not only thermal conductivity in face with higher, while good electrical insulating property and bendable folding endurance are also maintained, therefore have potential application on the heat management of the following flexible electronic device.This method is easy to operate, and preparation condition is relatively easy, lower production costs, is easy to mass, large-scale production, has good industrialized production basis and wide application prospect.
Description
Technical field
The invention belongs to heat conduction composite membrane and its preparation and application field, in particular to a kind of flexible, electrical isolation fluorination stone
Black alkene heat conduction composite membrane and its preparation and application.
Background technique
In past ten years, all kinds of portable devices (mobile phone, tablet computer and other smart machines etc.) were towards multi-functional
Change, the fast-developing electronic building brick to its inside in lightening and flexibleization direction is in integrated, miniaturization and high power
Etc. more stringent requirements are proposed in indexs.In this case, the increase of unit area hot-fluid will certainly bring serious heat consumption
The problem of dissipating, and this can be closely related with the service life of electronic device and operational reliability.Using with direction thermal conductivity in high face,
Good electrical insulating property and anisotropic thermal film flexible are considered as a kind of highly integrated electronics of solution as heat dissipative material
The effective ways of apparatus overheat.
Graphene is as two-dimensional material instantly of greatest concern, the thermal conductivity (~5300W m with superelevation-1K-1), it is fabulous
Flexibility and high radius-thickness ratio.These excellent comprehensive performances make them become substitution conventional thermal conductive in preparing Heat Conduction Material
The splendid selection of filler.In many heat-conductive composite materials, prepared by the high temperature graphitization processing of graphene oxide membrane soft
Property graphene heat conducting film due to superelevation macroscopical thermal conductivity (be greater than 1000W m-1K-1) and receive academia and business circles
Extensive concern (Adv.Funct.Mater.2014,24,4542；Small,2018,14,1801346；Adv.Mater.2017,
29,1700589).For example, Liu et al. reports the natural volatile dry by GO aqueous solution on aluminium sheet and combines high temperature graphitization
Processing obtains graphene heat conducting film, and thermal conductivity can achieve 3200W m in face-1K-1(Small,2018,14,1801346)。
Furthermore lot of documents report also is answered commercialization graphene microchip or redox graphene and some polymer molecules
Close directly to prepare self-supporting heat conduction composite membrane (ACS Appl.Mater.Interfaces, 2018,10,41690；
J.Mater.Chem.C,2016,4,305；Compos.Sci.Technol.,2017,138,179).But regrettably, to the greatest extent
These graphene-based heat conducting films are managed with direction thermal conductivity in more excellent face, but the conductivity that graphene itself is fabulous
Also cause the electrical insulating property of composite membrane be usually it is poor, which greatly limits them in some electricity with highly integrated degree
Application in sub- device.Although introducing nano material such as boron nitride (Chem.Mater., the 2016,28,1049- of some insulating properties
1057), insulation oxide (Compos.Sci.Technol., 2016,137,16；ACS Appl.Mater.Interfaces
2015,7,14397) insulating of composite material can etc. be realized by blocking the formation of graphene conductive network, but
Mechanical performance or heating conduction to composite membrane can be remarkably decreased.In addition, it is contemplated that the needs of electrical isolation, equally have higher
The boron nitride that thermal conductivity has both excellent electrical insulating property simultaneously is believed to effectively substitute graphene as heat filling.It is so far
Only, boron nitride film reported in the literature is mainly to be constructed as interlayer adhesive with one by introducing a small amount of organic macromolecule
Determine intensity membrane structure (ACS Appl.Mater.Interfaces, 2017,9,30035；2D Mater.,2017,4,
025047；Compos.Sci.Technol.,2018,160,199).But it is hot in the face for the boron nitride heat conducting film reported at present
Conductance is respectively less than 60W m-1K-1。
The fluorination of graphene can make the bonding form of carbon-carbon bond by sp2To sp3Conversion, to realize the taboo to graphene
The Effective Regulation of bandwidth.It is reflected in intrinsic performance, with the raising of degree of fluorination, the conductivity of graphene can be shown quickly
Decline, namely rapidly go to insulator state from conductive state.However the thermal conductivity of graphene with degree of fluorination variation then
There is biggish difference.Simulated experiment finds that "U" shaped variation tendency is presented with the raising of degree of fluorination in the thermal conductivity of graphene.When
When degree of fluorination reaches 100%, the thermal conductivity of fluorinated graphene can reach the 35% of initial value.That is, fluoridized stone
Black alkene can also remain above 1800W m while possessing good electrical insulating property and flexibility-1K-1Theoretical thermal conductivity.
Therefore, we, which are envisioned that, uses fluoridized or highly fluorinated graphene nanometer sheet as heat filling to prepare heat conducting film
It is expected to make it while obtaining high thermal conductivity and excellent electrical insulating property.And fluorinated graphene is used to make as heat filling at present
Standby heat dissipative material does not have document or patent report also.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of flexible, electrical isolation fluorinated graphene heat conduction composite membrane and its
Preparation and application, overcome the boron nitride composite membrane poor thermal conductivity obtained in the prior art and the nonisulated defect of graphene film, should
Inventing obtained fluorinated graphene heat conduction composite membrane structural relation is the fluorine that polyvinyl alcohol molecule chain is distributed in orderly orientations
Between graphite alkene nanoscale twins and play the role of bonding adjacent sheets, this structure imparts composite membrane while having both high face
Interior thermal conductivity, good electrical insulating property and bendable folding endurance.
A kind of fluorinated graphene heat conduction composite membrane of the invention, the composite membrane include fluorinated graphene nanometer sheet and interlayer
Adhesive polyethylene alcohol, polyvinyl alcohol molecule chain is distributed between the fluorinated graphene nanoscale twins of orderly orientations and Binder Phase
Adjacent lamella.
The fluorinated graphene nanometer sheet has the orientations of height along direction in film surface, can effectively facilitate hot edge
The transmitting in direction in film surface, and polyvinyl alcohol then plays bonding adjacent sheets and reduces interface layer thermal resistance and improve film mechanicalness
The effect of energy.
As described herein, " orderly orientations " refer to one-dimensional with big L/D ratio or two-dimensional nano filler its radial direction
Or axially along space a direction in a certain order regular distribution the phenomenon that.
The mass ratio of the fluorinated graphene and polyvinyl alcohol is 5~14:1~2.
The anisotropic membrane of the high-sequential passes through decompression aided filter membrane formation process preparation.
A kind of preparation method of fluorinated graphene heat conduction composite membrane of the invention, comprising:
(1) it disperses fluorinated graphene in solvent, ultrasound, centrifugation, the fluorinated graphene nanometer sheet removed；
(2) above-mentioned fluorinated graphene nanometer sheet is dispersed in water, polyvinyl alcohol water solution is added, ultrasound is fluorinated
Graphene dispersing solution is filtered under diminished pressure, and obtains fluorinated graphene heat conduction composite membrane.
The preferred embodiment of above-mentioned preparation method is as follows:
Solvent is N,N-dimethylformamide, in isopropanol, N-Methyl pyrrolidone, methylene chloride in the step (1)
One or more.
Ultrasound is that water bath sonicator instrument carries out ultrasound, power 150-500W, ultrasonic time 8-24h in the step (1)；
Centrifugation: 5-20min is centrifuged under the revolving speed of 1000-3000rpm.
Further, ultrasonic power is one of 150W, 250W and 500W in the step (1).
The molecular weight of polyvinyl alcohol is 47-205kg/mol in the step (2).
Further, in the step (2) polyvinyl alcohol molecular weight be 47kg/mol, 67kg/mol, 145kg/mol,
One of 205kg/mol.
Fluorinated graphene nanometer sheet is dispersed in water in the step (2), wherein the matter of fluorinated graphene nanometer sheet and water
Amount volume ratio is 20-40mg:100-200mL；The concentration of polyvinyl alcohol water solution is 6wt%；Fluorinated graphene nanometer sheet, poly- second
The mass ratio of enol is 20-40mg:3-40mg.
Ultrasonic time is 20-60min in the step (2)；It is filtered under diminished pressure to use to mix cellulose acetate as filter membrane
Pressure-reducing filter be filtered under diminished pressure.
A kind of application of fluorinated graphene heat conduction composite membrane provided by the invention, such as sets in portable or flexible electronic
There is biggish potential using value on standby heat management.
Beneficial effect
(1) the characteristics of present invention mainly has both high thermal conductivity, electrical isolation and two-dimension flexible using highly fluorinated graphene is come
Solve the problems, such as that electronation or low degree thermal reduction graphene film are low thermally conductive and nonisulated；
(2) method provided by the invention can obtain the anisotropy fluorine for having both high thermal conductivity, good electrical isolation and bending
Graphite alkene heat conduction composite membrane mainly realizes fluorinated graphene nanometer sheet along direction in film surface by decompression aided filter method
Layer upon layer obtains anisotropy Ordered Film, to promote the significant increase of film direction thermal conductivity in face；In addition a small amount of poly- second
Being added for enol then reinforces the interaction between adjacent sheets as interlayer adhesive, plays the work for reducing interface layer thermal resistance
With.The fluorinated graphene heat conduction composite membrane of this method preparation is in following highly integrated portable or flexible electronic devices the heat management
It is upper that there is biggish potential using value；
(3) the method for the present invention is easy to operate, and preparation condition is relatively easy, lower production costs, is easy to mass, scale
Production has good industrialized production basis and wide application prospect；
(4) present invention is flexible, is electrically insulated in fluorinated graphene heat conduction composite membrane, and fluorinated graphene nanometer sheet is along side in face
To the orientations feature with height, and polyvinyl alcohol effectively enhances the interaction of interlayer as interlayer adhesive,
So that the composite membrane of preparation shows good thermal conductivity, electrical insulating property and bending, when fluorinated graphene additive amount is
When 93wt%, thermal conductivity can achieve 61.3W/mK in the face of composite membrane, while keep good electrical insulating property (> 1011Ωcm)。
Although the fluorinated graphene composite membrane that the present invention obtains obtains after being less than graphene oxide high temperature graphitization on heating conduction
Graphene heat conducting film (> 1000W m-1K-1), but be higher than big counted by graphene microchip or reduction-oxidation graphite absolutely
Self-supporting the heat conduction composite membrane (< 50W m of alkene and the compound preparation of some polymer molecules-1K-1)(Nanoscale,2016,8,
19984；ACS Appl.Mater.Interfaces,2018,10,41690；J.Mater.Chem.C,2016,4,305；).This
Outside, fluorinated graphene film prepared by the present invention is then wanted to be higher than significantly on electrical insulation capability above-mentioned graphene-based thermally conductive multiple
Close film.
Detailed description of the invention
Fig. 1 is the transmission electron microscope figure of fluorinated graphene used in Examples 1 to 5.
Fig. 2 is the x-ray photoelectron spectroscopy figure of fluorinated graphene used in Examples 1 to 5.
Fig. 3 is the brittle failure Surface scan electron microscope of the fluorinated graphene film of different polyvinyl alcohol contents in Examples 1 to 5；Its
The additive amount that middle a, b, c and d respectively indicate fluorinated graphene is 93wt%, 88.6wt%, 81.8wt% and 73.3wt%.
Fig. 4 is the tensile stress-strain curve of the fluorinated graphene film of different polyvinyl alcohol contents in Examples 1 to 5.
Fig. 5 is the fluorographite that polyvinyl alcohol content is respectively 7wt% (a) He 26.7wt% (b) in embodiment 1 and example 5
The flexible display diagram of alkene film.
Fig. 6 is the volume resistivity figure of the fluorinated graphene film of different polyvinyl alcohol contents in Examples 1 to 5.
Fig. 7 is thermal conductivity figure in the face of the fluorinated graphene film of polyvinyl alcohol contents different in Examples 1 to 5.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Reagent source: far at Science and Technology Ltd., (5-10 microns of size, fluorinated volume is about purchased from Hubei for fluorographite
58wt%)；Isopropanol is purchased from traditional Chinese medicines Reagent Company；Polyvinyl alcohol is purchased from Aladdin Reagent Company.
Embodiment 1
(1) disperse commercial fluorographite powder in isopropanol, on water bath sonicator instrument ultrasound for 24 hours (250W), then
Mixed dispersion liquid is centrifuged to the fluorinated graphene nanometer sheet that 10min is removed under the revolving speed of 3000rpm.
(2) it weighs and obtains fluorinated graphene in 40mg step (1) and be dispersed in 200ml water, be added 0.05ml 6wt%'s
Polyvinyl alcohol (molecular weight 145kg/mol) aqueous solution, ultrasonic 30min obtain evenly dispersed fluorinated graphene dispersion liquid；Then
Dispersion liquid is poured into the pressure-reducing filter of mixing cellulose acetate filter membrane, fluorinated graphene nanometer sheet is made uniformly successively to sink
Product obtains anisotropic composite graphite alkene heat conducting film, is by the fluorinated graphene content of thermogravimetic analysis (TGA) estimation under this condition
93wt%.
The transmission electron microscope figure of fluorinated graphene is as shown in Figure 1, show: the fluorinated graphene of removing is in class graphene
Flake, have biggish radius-thickness ratio.
The x-ray photoelectron spectroscopy figure of fluorinated graphene, as shown in Fig. 2, showing: the fluorinated graphene removed contains
Fluorine amount is 48.2at% (atomic percentage), and fluorine/atom ratio is 0.94, shows it with very high degree of fluorination.
Embodiment 2
(1) disperse commercial fluorographite powder in isopropanol, on water bath sonicator instrument ultrasound for 24 hours (250W), then
Mixed dispersion liquid is centrifuged to the fluorinated graphene nanometer sheet that 10min is removed under the revolving speed of 3000rpm.
(2) it weighs and obtains fluorinated graphene in 40mg step (1) and be dispersed in 200ml water, the poly- of 0.1ml 6wt% is added
Vinyl alcohol (molecular weight 145kg/mol) aqueous solution, ultrasonic 30min obtain evenly dispersed fluorinated graphene dispersion liquid；Then will
Dispersion liquid is poured into mixing cellulose acetate filter membrane pressure-reducing filter, obtains the uniform layer by layer deposition of fluorinated graphene nanometer sheet
To anisotropic composite graphite alkene heat conducting film, it is by the fluorinated graphene content of thermogravimetic analysis (TGA) estimation under this condition
88.6wt%.
Embodiment 3
(1) disperse commercial fluorographite powder in isopropanol, on water bath sonicator instrument ultrasound for 24 hours (250W), then
Mixed dispersion liquid is centrifuged to the fluorinated graphene nanometer sheet that 10min is removed under the revolving speed of 3000rpm.
(2) it weighs and obtains fluorinated graphene in 40mg step (1) and be dispersed in 200ml water, the poly- of 0.2ml 6wt% is added
Vinyl alcohol (molecular weight 145kg/mol) aqueous solution, ultrasonic 30min obtain evenly dispersed fluorinated graphene dispersion liquid；Then will
Dispersion liquid is poured into mixing cellulose acetate filter membrane pressure-reducing filter, obtains the uniform layer by layer deposition of fluorinated graphene nanometer sheet
To anisotropic composite graphite alkene heat conducting film, it is by the fluorinated graphene content of thermogravimetic analysis (TGA) estimation under this condition
81.8wt%.
Embodiment 4
(1) isopropanol is dispersed by commercial fluorographite powder, ultrasound for 24 hours (250W), then will on water bath sonicator instrument
Mixed dispersion liquid is centrifuged the fluorinated graphene nanometer sheet that 10min is removed under the revolving speed of 3000rpm.
(2) it weighs and obtains fluorinated graphene in 40mg step (1) and be dispersed in 200ml water, the poly- of 0.3ml 6wt% is added
Vinyl alcohol (molecular weight 145kg/mol) aqueous solution, ultrasonic 30min obtain evenly dispersed fluorinated graphene dispersion liquid；Then will
Dispersion liquid is poured into mixing cellulose acetate filter membrane pressure-reducing filter, obtains the uniform layer by layer deposition of fluorinated graphene nanometer sheet
To anisotropic composite graphite alkene heat conducting film, it is by the fluorinated graphene content of thermogravimetic analysis (TGA) estimation under this condition
78.1wt%.
Embodiment 5
(1) isopropanol is dispersed by commercial fluorographite powder, ultrasound for 24 hours (250W), then will on water bath sonicator instrument
Mixed dispersion liquid is centrifuged the fluorinated graphene nanometer sheet that 10min is removed under the revolving speed of 3000rpm.
(2) it weighs and obtains fluorinated graphene in 40mg step (1) and be dispersed in 200ml water, the poly- of 0.5ml 6wt% is added
Vinyl alcohol (molecular weight 145kg/mol) aqueous solution, ultrasonic 30min obtain evenly dispersed fluorinated graphene dispersion liquid；Then will
Dispersion liquid is poured into mixing cellulose acetate filter membrane pressure-reducing filter, obtains the uniform layer by layer deposition of fluorinated graphene nanometer sheet
To anisotropic composite graphite alkene heat conducting film, it is by the fluorinated graphene content of thermogravimetic analysis (TGA) estimation under this condition
73.3wt%.
The brittle failure Surface scan electron microscope of the fluorinated graphene film of different polyvinyl alcohol contents is as shown in figure 3, show: obtaining
Fluorinated graphene nanometer sheet is closely orientated along direction in face inside fluorinated graphene film piles up.But with polyvinyl alcohol addition
Increase, the orientation of fluorinated graphene nanometer sheet piles up order degree and is gradually reduced, and adjacent piece interlamellar spacing is due to polyvinyl alcohol
Filling be also gradually increased.
The tensile stress-strain curve of the fluorinated graphene film of different polyvinyl alcohol contents is as shown in figure 4, show: fluorination
The composite membrane tensile strength that graphene content is 93wt% is 27.3MPa, with the increase of polyvinyl alcohol content, the drawing of composite membrane
It stretches intensity and elongation at break increases with it.
The flexible of fluorinated graphene film is shown as shown in figure 5, showing: fluorinated graphene composite membrane all has good bendable
Folding endurance.The composite membrane that fluorinated graphene content is 73.3wt% has fabulous folded form, it might even be possible in not damaged situation
Under be folded into complicated shape.
The volume resistivity of the fluorinated graphene film of different polyvinyl alcohol contents is as shown in fig. 6, show: even if in high fluorine
Under graphite alkene additive amount, composite membrane still has excellent electrical insulating property, and (volume resistivity is consistently greater than 1011Ωcm)。
Thermal conductivity is as shown in fig. 7, show in the face of the fluorinated graphene film of different polyvinyl alcohol contents: with fluorographite
The increase of alkene additive amount, thermal conductivity is gradually increased in the face of composite membrane, when the compound film surface that fluorinated graphene content is 93wt%
Interior thermal conductivity is up to 61.3W m-1K-1, it is higher than current boron nitride-base electric-insulation heat-conduction film (< 60W m reported in the literature-1K-1)
(ACS Appl.Mater.Interfaces,2017,9,30035；2D Mater.,2017,4,025047；
Compos.Sci.Technol.,2018,160,199；ACS Appl.Nano Mater.2018,1,4875).
Comparative example 1
Zheng etc. is published in the work on advanced function material periodical (Adv.Funct.Mater.2014,24,4542) in the recent period
The method for making to dry by 50 DEG C of graphene oxide water solution low temperature first is prepared for graphene oxide membrane, then again through 2000 DEG C
High temperature graphitization operates to obtain final graphene heat conducting film.It shows on heating conduction, direction heat in the face of the graphene film
Conductance can achieve 1100W m-1K-1.Furthermore the conductivity of the graphene composite film can achieve 1000S cm-1, show its tool
There is extremely excellent electric conductivity, this limits their applications in some electronic equipments to a certain degree.And it is obtained in the present invention
Fluorinated graphene film then there is excellent electrical insulating property and flexibility.
Comparative example 2
Drzal etc. be published in the work on carbon periodical (Carbon 2011,49,773) be prepared for hot soarfing from graphene receive
The heat conduction composite membrane of rice piece and polyethyleneimine.Thermal conductivity is up to 178W m in the face of the composite membrane-1K-1, it is relatively higher than this work
The thermal conductivity of the fluorinated graphene heat conduction composite membrane of work.But the electrical insulating property of the composite membrane be still it is poor, it is same this
Determine degree and limits their applications in some electronic equipments.And fluorinated graphene film obtained in the present invention then have it is excellent
Electrical insulating property and flexibility.
Comparative example 3
Song etc. is published in the work on materials chemistry will C periodical (J.Mater.Chem.C, 2016,4,305) in the recent period will
Water-soluble cellulose nanofiber (NFC) helps redox graphene (rGO) dispersion liquid of dispersion to smoke film by being filtered under diminished pressure
Method is prepared for NFC/rGO heat conduction composite membrane.Thermal conductivity is 6.17W m in the face of the NFC/rGO composite membrane-1K-1, and it is also
Electrically non-insulative.Therefore the standby fluorinated graphene film of this duty is intended to due to the NFC/rGO in thermal conductivity and electrical insulating property
Composite membrane.
Comparative example 4
Xie etc. be published in the recent period American Chemical Society's application material and interface magazine (J.Mater.Chem.C, 2016,4,
305) dispersion liquid of the Cellulose nanocrystal (OCNC) of oxidation and graphene (GNS) nanometer sheet is passed through natural drying by the work on
The heat conduction composite membrane that both is prepared for of method.Thermal conductivity can be in the face when graphene content is 4.1vol% for the composite membrane
Reach 25.66W m-1K-1.The same therefore standby fluorinated graphene film of this duty be intended in thermal conductivity and electrical insulating property due to
The OCNC/GNS composite membrane.
Comparative example 5
Li et al. is published in the recent period on composite science and technology (Compos.Sci.Technol., 2017,138,179)
Work be prepared for the thermally conductive of cellulose nano-fibrous (NFC) and graphene microchip (GNPs) by being filtered under diminished pressure the method for taking out film
Composite membrane.The NFC/GNPs composite membrane GNPs content be 75wt% when face in direction thermal conductivity up to 59.46W m-1K-1,
But it equally has better electric conductivity.Therefore the standby fluorinated graphene film of this duty is in thermal conductivity and electrical insulating property
Also it is better than NFC/GNPs composite membrane.
Claims (9)
1. a kind of fluorinated graphene heat conduction composite membrane, which is characterized in that the composite membrane includes fluorinated graphene nanometer sheet and gathers
Vinyl alcohol, polyvinyl alcohol molecule chain are distributed between the fluorinated graphene nanoscale twins of orderly orientations and bond adjacent sheets.
2. composite membrane according to claim 1, which is characterized in that the mass ratio of the fluorinated graphene and polyvinyl alcohol is 5
~14:1~2.
3. a kind of preparation method of any fluorinated graphene heat conduction composite membrane of claim 1-2, comprising:
(1) by Graphite fluoride Composite Deposition in solvent, ultrasound, centrifugation, the fluorinated graphene nanometer sheet removed；
(2) above-mentioned fluorinated graphene nanometer sheet is dispersed in water, polyvinyl alcohol water solution is added, ultrasound obtains equably fluorine
Graphite alkene dispersion liquid, is filtered under diminished pressure, and obtains fluorinated graphene heat conduction composite membrane.
4. preparation method according to claim 3, which is characterized in that solvent is N, N- dimethyl formyl in the step (1)
One or more of amine, isopropanol, N-Methyl pyrrolidone, methylene chloride.
5. preparation method according to claim 3, which is characterized in that ultrasound is that water bath sonicator instrument carries out in the step (1)
Ultrasound, power 150-500W, ultrasonic time 8-24h；Centrifugation: 5-20min is centrifuged under the revolving speed of 1000-3000rpm.
6. preparation method according to claim 3, which is characterized in that the molecular weight of polyvinyl alcohol is 47- in the step (2)
205kg/mol。
7. preparation method according to claim 3, which is characterized in that fluorinated graphene nanometer sheet is dispersed in the step (2)
In water, wherein the mass volume ratio of fluorinated graphene nanometer sheet and water is 20-40mg:100-200mL；Polyvinyl alcohol water solution
Concentration be 6wt%；Fluorinated graphene nanometer sheet, polyvinyl alcohol mass ratio be 20-40mg:3-40mg.
8. preparation method according to claim 3, which is characterized in that ultrasonic time is 20-60min in the step (2)；Subtract
Press filtration is to use to be filtered under diminished pressure to mix cellulose acetate as the pressure-reducing filter of filter membrane.
9. the application of fluorinated graphene heat conduction composite membrane described in a kind of claim 1.
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| CN111410190A (en) * | 2020-04-28 | 2020-07-14 | 上海交通大学 | Graphene-boron nitride composite film with insulating and heat-conducting properties and preparation method thereof |
| CN111908460A (en) * | 2020-07-06 | 2020-11-10 | 深圳市展旺新材料科技有限公司 | Preparation method of highly ordered and compact graphene heat-conducting film |
| CN113321444A (en) * | 2021-07-08 | 2021-08-31 | 南方科技大学 | Fluorinated graphene heat-conducting film and preparation method and application thereof |
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| CN111410190B (en) * | 2020-04-28 | 2023-04-07 | 上海交通大学 | Graphene-boron nitride composite film with insulating and heat-conducting properties and preparation method thereof |
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| CN113321444A (en) * | 2021-07-08 | 2021-08-31 | 南方科技大学 | Fluorinated graphene heat-conducting film and preparation method and application thereof |
| CN113321444B (en) * | 2021-07-08 | 2023-11-03 | 南方科技大学 | Fluorinated graphene heat-conducting film and preparation method and application thereof |
| CN114456526A (en) * | 2022-02-28 | 2022-05-10 | 中国科学院上海应用物理研究所 | Polymer composite material and preparation method and application thereof |
| CN115231565A (en) * | 2022-06-29 | 2022-10-25 | 安徽宇航派蒙健康科技股份有限公司 | Fluorinated graphene heat-conducting film and preparation method thereof |
| CN115011072A (en) * | 2022-07-08 | 2022-09-06 | 安徽宇航派蒙健康科技股份有限公司 | Epoxy resin composite heat conducting fin and preparation method thereof |
| CN115160733A (en) * | 2022-07-19 | 2022-10-11 | 安徽宇航派蒙健康科技股份有限公司 | Epoxy resin composite material, preparation method thereof, heat conducting fin and electronic device |
| CN115340767A (en) * | 2022-08-26 | 2022-11-15 | 安徽宇航派蒙健康科技股份有限公司 | High-thermal-conductivity insulating silica gel and preparation method thereof |
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