CN108148214A - A kind of graphite-based phase transformation composite membrane and preparation method thereof, application - Google Patents
A kind of graphite-based phase transformation composite membrane and preparation method thereof, application Download PDFInfo
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- CN108148214A CN108148214A CN201711443196.1A CN201711443196A CN108148214A CN 108148214 A CN108148214 A CN 108148214A CN 201711443196 A CN201711443196 A CN 201711443196A CN 108148214 A CN108148214 A CN 108148214A
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- graphite
- based phase
- composite membrane
- phase transformation
- transformation composite
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
Abstract
The present invention discloses a kind of graphite-based phase transformation composite membrane and preparation method thereof, application.Wherein, the graphite-based phase transformation composite membrane includes：Basement membrane and the graphite based phase-change material compound with the basement membrane.The present invention passes through the composite graphite based phase-change material on basement membrane, preparing has the function of the graphite-based phase transformation composite membrane of heat storage, the graphite-based phase transformation composite membrane has the function of apparent intelligent temperature control, when heat source temperature is excessively high, can absorb excessive heat and play the role of preventing overtemperature；Phase transformation composite heat conduction film has preferable insulation performance, solves the problems, such as graphite film on-insulated in itself, can not have in addition coat insulating film again.Prepared graphite-based phase transformation composite membrane can be applied in battery thermal management, radiating element.
Description
Technical field
The present invention relates to phase transformation composite membrane technology field more particularly to a kind of graphite-based phase transformation composite membrane and its preparation sides
Method, application.
Background technology
The radiating mode of electronic product is mainly otherwise known as conductive graphite using conduction graphite film, conduction graphite film at present
Piece, heat dissipation graphite film film etc..Conduction graphite film is a kind of novel heat conduction and heat radiation material, due to its heat conduction and heat radiation effect very
Significantly, it has been widely used in the electronic products such as LCDTV, Notebook PC, MPU, Power Supply, LED.
Although existing conduction graphite film thermal conductivity factor is very high, heat can comparatively fast be conducted.If but heat source wink
Between generate very big heat, because existing conduction graphite film do not have heat storage function, the work for preventing overtemperature is not had to electronic product
With.
Therefore, the prior art has yet to be improved and developed.
Invention content
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of graphite-based phase transformation composite membrane and its systems
Preparation Method, application, it is intended to solve existing conduction graphite film, occur that moment heat is increased, and not having prevents in heat source
The problem of overtemperature.
Technical scheme is as follows：
A kind of graphite-based phase transformation composite membrane, wherein, including basement membrane and the graphite-based phase transformation material with being arranged on the membrane surface
Material, the graphite based phase-change material include the multilayer chip graphene of 5-10%, the carbon fiber of 2-5%, 60- by weight percentage
80% long chain alkane.
The graphite-based phase transformation composite membrane, wherein, the graphite based phase-change material further includes 5- by weight percentage
10% reinforced resin and the oil-absorbing resin of 5-10%.
A kind of preparation method of graphite-based phase transformation composite membrane, wherein, including step：
A, by weight, 2-5 parts of binding agent and 40-70 parts of graphite based phase-change material are added to 30-50 parts of solvent
In, it is uniformly mixing to obtain slurry；
B, the slurry is coated on basement membrane, obtains preliminary composite membrane；Again by the preliminary composite membrane successively drying, roll-in
After obtain graphite-based phase transformation composite membrane.
The preparation method of the graphite-based phase transformation composite membrane, wherein, the step A is specifically included：
A1, solvent 30-50 parts described is warming up to predetermined temperature, 2-5 parts of binding agent is added in stirring, binding agent is obtained and mixes
Close liquid；
A2, by graphite based phase-change material 40-70 parts described, be added in the binding agent mixed liquor, stir in the given time
It mixes and uniformly obtains slurry.
The preparation method of the graphite-based phase transformation composite membrane, wherein, the solvent is pure water.
The preparation method of the graphite-based phase transformation composite membrane, wherein, the binding agent is Kynoar or neoprene rubber
Glue.
The preparation method of the graphite-based phase transformation composite membrane, wherein, in the step A1, the predetermined temperature is 40-
55℃。
The preparation method of the graphite-based phase transformation composite membrane, wherein, the viscosity of the slurry is 5000-10000Pa
s·25℃。
A kind of application of graphite-based phase transformation composite membrane, wherein, the graphite-based phase transformation composite membrane is applied to battery thermal
In reason, radiating element.
Advantageous effect：The present invention prepares the stone with heat storage by the composite graphite based phase-change material on basement membrane
Black base phase transformation composite membrane, the graphite-based phase transformation composite membrane has the function of apparent intelligent temperature control, when heat source temperature is excessively high, energy
It enough absorbs excessive heat and plays the role of preventing overtemperature；Phase transformation composite heat conduction film has preferable insulation performance, solves stone
The problem of ink film on-insulated in itself, can not have in addition coat insulating film again.Prepared graphite-based phase transformation composite membrane can answer
For in battery thermal management, radiating element.
Description of the drawings
Fig. 1 is a kind of flow chart of the preparation method preferred embodiment of graphite-based phase transformation composite membrane of the present invention.
Specific embodiment
The present invention provides a kind of graphite-based phase transformation composite membrane and preparation method thereof, application, to make the purpose of the present invention, technology
Scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.It is it should be appreciated that described herein specific
Embodiment is only used to explain the present invention, is not intended to limit the present invention.
The graphite-based phase transformation composite membrane of the present invention, including：Basement membrane and the graphite-based phase with being arranged on the membrane surface
Become material, the basement membrane is common conduction graphite film, has the function of what heat was stored up by compound in common conduction graphite film
Graphite based phase-change material so that prepared graphite-based phase transformation composite membrane has the function of intelligent temperature control, works as heat source（As LCD screen,
Laptop）When the temperature is excessively high, excessive heat can be absorbed and play prevent heat source be more than its normal temperature in use, energy
Enough play a very good protection.
Further, the graphite based phase-change material is to do main material with multilayer chip graphene and long chain alkane, addition
Fire retardant, carbon fiber, reinforced resin and oil-absorbing resin are prepared.
Specifically, the graphite based phase-change material includes：The multilayer chip graphene of 5-10%（Such as 8%）, the carbon of 2-5% it is fine
Dimension（Such as 3%）, 60-80% long chain alkane（Such as 70%）, the reinforced resin of 5-10%（Such as 8%）With the oil-absorbing resin of 5-10%（Such as 7%）
By weight percentage.
Preferably, the long chain alkane can be one kind in 52# paraffin or 60# paraffin（Such as 60# fully refined paraffin wax）, it is described
Reinforced resin is one kind in HDPE or ABS, and the oil-absorbing resin is polyacrylate, and the fire retardant is hindered for phosphorus series non-halogen element
It fires one or more in agent, nitrogen system bittern-free element fire retardant or phosphorous-nitrogen system bittern-free element fire retardant.
Preferably, the carbon fiber is chopped carbon fiber, effective enhancing can be played to graphite based phase-change material and is made
With, can resist graphite based phase-change material melt, solidify during phase transformation because of volume expansion repeatedly, shrink caused by destruction；
The content of graphite based phase-change material can be largely put forward, and then improves the heat storage capacity of graphite-based phase transformation composite membrane, makes its right
The adjusting control of temperature is more stable.
Referring to Fig. 1, the flow chart of the preparation method preferred embodiment of its graphite-based phase transformation composite membrane for the present invention, such as
Shown in Fig. 1, including step：
2-5 parts of binding agent and 40-70 parts of graphite based phase-change material are added to 30-50 parts molten by S100, by weight
In agent, it is uniformly mixing to obtain slurry；
S200, the slurry is coated on basement membrane, obtains preliminary composite membrane；Again by the preliminary composite membrane successively drying,
Graphite-based phase transformation composite membrane is obtained after roll-in.
Specifically, it is relatively thin in order to prepare film thickness（If film thickness is 0.02mm）Graphite-based phase transformation composite membrane, need to use coating
It is prepared by the method for forming.It is not easy to disperse since graphite based phase-change material grain size itself is larger, it is pre- using first solvent is warming up to
Constant temperature degree, adds in binding agent in stirring, and binding agent is uniformly dispersed in a solvent, then adds in the graphite-based of certain phase transition temperature
Phase-change material is stirred under vacuum environment, and the slurry of certain viscosity is made.Slurry is applied to by graphite film by extrusion coating machine
On, obtain preliminary composite membrane；Graphite-based phase transformation composite membrane will be obtained after the preliminary composite membrane successively drying, roll-in again,
Prepared graphite group compound film stability is good, and film thickness consistency is good.
The present invention program is described in detail below by specific embodiment：
Embodiment 1
30 parts of solvent pure water are added in 100L reaction kettles, are heated to 40 DEG C, with 4000rpm, 2 parts of bondings are added in stirring
Agent Kynoar or neoprene stir 30min, then 40 parts of 60 DEG C of phase transition temperature graphite based phase-change material powder are existed
It is uniformly added into reaction kettle in 20min, is stirred under vacuum 60min, mixing speed is adjusted to 3000rpm, obtains viscosity in 5000Pa
S25 DEG C of slurry.
By 50 meters of extrusion coating machines, speed is transferred to 2 meters per minute, and then slurry is uniformly extruded in 50cm × 50m heat conduction stones
On ink film, preliminary composite membrane is obtained, the preliminary composite membrane is at the uniform velocity then entered into baking oven region（Drying box temperature 60 C）, most
Afterwards with 2 tons of roll squeezer two pairs of rollers, cutting edge and coiled, you can obtain the high latent heat of high heat conduction of 60 DEG C of phase transformation temperature points, thickness exists
The graphite-based phase transformation composite membrane of 0.03mm.
Embodiment 2
50 parts of solvent pure water are added in 100L reaction kettles, are heated to 55 DEG C, with 4000rpm, 5 parts of bondings are added in stirring
Agent Kynoar or neoprene stir 30min, then 70 parts of 80 DEG C of phase transition temperature graphite based phase-change material powder are existed
It is uniformly added into reaction kettle in 20min, is stirred under vacuum 60min, mixing speed is adjusted to 3000rpm, obtains viscosity in 10000Pa
S25 DEG C of slurry.
By 50 meters of extrusion coating machines, speed is transferred to 2 meters per minute, and then slurry is uniformly extruded in 50cmX50m conductive graphites
On film, preliminary composite membrane is obtained, the preliminary composite membrane is at the uniform velocity then entered into baking oven region（Drying box temperature 60 C）, finally
With 2 tons of roll squeezer two pairs of rollers, cutting edge and coiled, you can obtain the high latent heat of high heat conduction of 80 DEG C of phase transformation temperature points, thickness exists
The graphite-based phase transformation composite membrane of 0.05mm.
Further, heretofore described graphite-based phase transformation composite membrane, it is mutually multiple with basement membrane in graphite-based phase change composite material
During conjunction, in addition to using coated and molded method, such as compression molding method, roll-forming method can also be used.
Below by specific embodiment in the present invention compression molding method, roll-forming method is described in detail：
1st, compression molding method
500mm × 500mm conduction graphite films are placed in the female mold intracavity bottom of 500mm × 500mm stainless steel band diversion trenches
（Depth of inner cavity 3mm）, then uniformly it is coated with graphite-based phase change composite material, the phase transition temperature of the graphite-based phase change composite material
20-200℃（Such as 100 DEG C）Between, about 500 grams of weight, then mold is placed in insulating box and is heated to 90 degree, constant temperature
30minmin is then put into the mold after heating in 10 tons of moulding press and suppresses, and constant pressure 30min treats that mold temperature is down to room temperature,
Form removal, you can obtain graphite-based phase transformation composite membrane of the thickness in certain high latent heat of phase transition temperature high heat conduction of 1mm, phase transition temperature model
Enclose 20-200 DEG C（Such as 100 DEG C）.
2nd, roll-forming method
Using the roll-in in three times of continuous rolling method, distance about 2m between two pairs of rollers, first by 20-200 DEG C（Such as 200 DEG C）Phase transition temperature
Graphite base composite phase-change pellet uniform stirring is to molten state, mixing speed 30r/min, 90-170 DEG C of heating temperature（Such as 150 DEG C）,
Then the graphite-based phase transformation material of molten state is at the uniform velocity expressed into movement speed in 1m/s conduction graphite films（Heat conducting film size
50cmX20m）, then sequentially enter a roller（1 ton of pressure）, two rollers（2 tons of pressure）With three rollers（5 tons of pressure）, last cutting edge obtains
200 DEG C of phase transition temperature laminated films or phase transformation compound foil, thickness is in 0.03-5mm（Such as 2mm）.
Further, the graphite group compound film can be applied in battery thermal management, radiating element by the present invention.
In conclusion the present invention prepares the stone with heat storage by the composite graphite based phase-change material on basement membrane
Black base phase transformation composite membrane, the graphite-based phase transformation composite membrane has the function of apparent intelligent temperature control, when heat source temperature is excessively high, energy
It enough absorbs excessive heat and plays the role of preventing overtemperature；Phase transformation composite heat conduction film has preferable insulation performance, solves stone
The problem of ink film on-insulated in itself, can not have in addition coat insulating film again.Further, by selecting different phase transition temperatures
Graphite based phase-change material, can obtain the graphite group compound film of different phase transition temperatures, and film can be obtained by using coated and molded method
Thick relatively thin graphite-based phase transformation composite membrane, the thicker graphite-based phase of film thickness can be obtained using compression molding method and roll-forming method
Become composite membrane, so as to expand the scope of application of graphite group compound film.
It should be understood that the application of the present invention is not limited to the above, it for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect range.
Claims (9)
1. a kind of graphite-based phase transformation composite membrane, which is characterized in that including basement membrane and the graphite with being arranged on the membrane surface
Based phase-change material, the carbon of the graphite based phase-change material multilayer chip graphene including 5-10%, 2-5% by weight percentage
The long chain alkane of fiber, 60-80%.
2. graphite-based phase transformation composite membrane according to claim 1, which is characterized in that the graphite based phase-change material is by weight
Percentages further include the reinforced resin of 5-10% and the oil-absorbing resin of 5-10%.
3. a kind of preparation method of graphite-based phase transformation composite membrane as described in claim 1, which is characterized in that including step：
A, by weight, 2-5 parts of binding agent and 40-70 parts of graphite based phase-change material are added to 30-50 parts of solvent
In, it is uniformly mixing to obtain slurry；
B, the slurry is coated on basement membrane, obtains preliminary composite membrane；Again by the preliminary composite membrane successively drying, roll-in
After obtain graphite-based phase transformation composite membrane.
4. the preparation method of graphite-based phase transformation composite membrane according to claim 3, which is characterized in that the step A is specific
Including：
A1, solvent 30-50 parts described is warming up to predetermined temperature, 2-5 parts of binding agent is added in stirring, binding agent is obtained and mixes
Close liquid；
A2, by graphite based phase-change material 40-70 parts described, be added in the binding agent mixed liquor, stir in the given time
It mixes and uniformly obtains slurry.
5. the preparation method of graphite-based phase transformation composite membrane according to claim 3, which is characterized in that the solvent is pure
Water.
6. the preparation method of graphite-based phase transformation composite membrane according to claim 3, which is characterized in that the binding agent is poly-
Vinylidene or neoprene.
7. the preparation method of graphite-based phase transformation composite membrane according to claim 4, which is characterized in that in the step A1,
The predetermined temperature is 40-55 DEG C.
8. the preparation method of graphite-based phase transformation composite membrane according to claim 3, which is characterized in that the viscosity of the slurry
It is 5000-10000Pas25 DEG C.
9. a kind of application of graphite-based phase transformation composite membrane, which is characterized in that by any graphite-based phase transformations of claim 1-2
Composite membrane is applied in battery thermal management, radiating element.
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| CN201711443196.1A CN108148214A (en) | 2017-12-27 | 2017-12-27 | A kind of graphite-based phase transformation composite membrane and preparation method thereof, application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109640411A (en) * | 2019-01-29 | 2019-04-16 | 长沙暖宇新材料科技有限公司 | A kind of graphene constant temperature electric heating film and preparation method thereof |
| CN113881124A (en) * | 2021-11-16 | 2022-01-04 | 深圳航美新材料科技有限公司 | Composite phase change film and preparation method thereof |
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| CN103342993A (en) * | 2013-06-26 | 2013-10-09 | 苏州天脉导热科技有限公司 | Composite material of graphite film and thermal interface material |
| CN106494028A (en) * | 2016-12-28 | 2017-03-15 | 镇江博昊科技有限公司 | A kind of flexible multi-layered graphene composite film and preparation method thereof |
| CN106987233A (en) * | 2017-04-11 | 2017-07-28 | 航美（深圳）新能源科技有限公司 | A kind of thermal management materials and preparation method thereof, application |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342993A (en) * | 2013-06-26 | 2013-10-09 | 苏州天脉导热科技有限公司 | Composite material of graphite film and thermal interface material |
| CN106494028A (en) * | 2016-12-28 | 2017-03-15 | 镇江博昊科技有限公司 | A kind of flexible multi-layered graphene composite film and preparation method thereof |
| CN106987233A (en) * | 2017-04-11 | 2017-07-28 | 航美（深圳）新能源科技有限公司 | A kind of thermal management materials and preparation method thereof, application |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640411A (en) * | 2019-01-29 | 2019-04-16 | 长沙暖宇新材料科技有限公司 | A kind of graphene constant temperature electric heating film and preparation method thereof |
| CN109640411B (en) * | 2019-01-29 | 2021-05-25 | 长沙暖宇新材料科技有限公司 | Graphene constant-temperature electrothermal film and preparation method thereof |
| CN113881124A (en) * | 2021-11-16 | 2022-01-04 | 深圳航美新材料科技有限公司 | Composite phase change film and preparation method thereof |
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Application publication date: 20180612 |
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