CN102601026B - Heat dissipation layer and preparation method thereof - Google Patents
Heat dissipation layer and preparation method thereof Download PDFInfo
- Publication number
- CN102601026B CN102601026B CN201110432788.XA CN201110432788A CN102601026B CN 102601026 B CN102601026 B CN 102601026B CN 201110432788 A CN201110432788 A CN 201110432788A CN 102601026 B CN102601026 B CN 102601026B
- Authority
- CN
- China
- Prior art keywords
- preparation
- curtain coating
- heat dissipating
- dissipating layer
- graphite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a preparation method of a heat dissipation layer, which includes following steps: 1) adding graphite powder and curtain coating glue into organic curtain coating solvent, and stirring the organic curtain coating solvent to prepare sizing agent; 2) directly coating the sizing agent onto a plane needing heat dissipation in a curtain coating or coating manner; and 3) naturally drying the sizing agent on the plane and obtaining the heat dissipation layer formed on the plane. In the preparation method for the heat dissipation layer, after the graphite powder is prepared into the sizing agent, the sizing agent is directly coated on the plane needing heat dissipation in the curtain coating or coating manner, a chemical reagent treatment process and a high-temperature heating process for preparing the graphite powder are omitted in a preparation process, cost can be saved quite effectively, the preparation process is pollution-free, preparation technology is simple, and the prepared graphite heat dissipation layer is still natural. The invention further discloses the heat dissipation layer, the main ingredient of the heat dissipation layer is natural graphite, and preparation cost of the heat dissipation layer is low.
Description
Technical field
The present invention relates to heat dissipating layer and preparation method thereof, particularly for the heat dissipating layer of plasma display or LED display panel.
Background technology
Electroluminescent display, for example plasma scope, light emitting diode indicator, the display floater of wherein bringing into play main demonstration effect is made up of multiple discharge cells, by applying voltage on discharge cell, thereby makes the luminous formation image of discharge cell realize the demonstration of image.Because each discharge cell of luminous formation image can produce heat, therefore each discharge cell forms thermal source.The temperature of luminogen discharge cell significantly raises, and the temperature of unactivated discharge cell is lower, and the temperature difference may be higher between the two, and the temperature of the regional area of panel surface is different.This local temperature difference can be accelerated the aging of discharge cell, causes display floater to produce crack and breakage, and shorten service life.
For the service life that the heat that thermal source is produced does not have influence on the demonstration of image and guarantees panel, often need to adhere to one deck heat dissipating layer at the back side of display floater, in the each space temperature variation of balanced panel, heat is shed.Because graphite has anisotropic structure, demonstrate the heat conductivity of high orientation, therefore often adopting graphite is that raw material is made heat dissipating layer.
In the existing method of preparing graphite radiating layer, generally comprise: after graphite flake is dispersed in and carries out intercalation processing in strong acid strong oxidizer (as the solution containing nitric acid and sulfuric acid mixture), then at the temperature of 900-1000 DEG C, heating while puffing forms (leafing) graphite that expands, now graphite has been expanded graphite, then the compacting of the expansion making (leafing) graphite is obtained to the heat dissipating layer of one deck soft graphite.When application, soft graphite heat dissipating layer is bonded in to the back side of the electroluminescence display panel that needs heat radiation by binding agent.Sometimes for strengthening graphite flake intercalation and expansion effect in said method, also need, under approximately 3000 DEG C or higher graphitization temperature, carry out pretreatment to graphite flake.In above-mentioned preparation method, relate to intercalation, de-intercalation step, preparation process complexity.The use and the high-temperature heating that in preparation process, relate to chemical reagent expanded simultaneously, need to consume mass energy, and preparation method's cost is higher, and the graphite radiating layer cost finally making is also higher.What above-mentioned preparation method prepared simultaneously is all soft graphite heat dissipating layer, yet there are no the report that directly forms the preparation method of heat dissipating layer about native graphite in prior art.
Summary of the invention
Technical problem to be solved by this invention is: make up above-mentioned the deficiencies in the prior art, propose a kind of preparation method of heat dissipating layer, in preparation process, method is simple, and cost is lower, and what prepare is without expanded native graphite heat dissipating layer.
The further technical problem to be solved of the present invention is: propose a kind of heat dissipating layer, it is without expanded native graphite heat dissipating layer, and preparation cost is lower.
Technical problem of the present invention is solved by following technical scheme:
A preparation method for heat dissipating layer, comprises the following steps: 1) graphite composite powder, curtain coating are placed in to organic curtain coating solvent with glue and stir, make slurry; 2) at room temperature, described slurry is directly coated in by the method for curtain coating or coating in the plane that needs heat radiation; 3) slurry in natural drying described plane, obtains being formed at the heat dissipating layer in described plane.
Technical problem of the present invention is solved by following further technical scheme:
A kind of heat dissipating layer, described heat dissipating layer is to be at room temperature directly coated in the plane that needs heat radiation by the method for curtain coating or coating by slurry, after natural drying, obtains; Described slurry is to be placed in organic curtain coating solvent by graphite composite powder, curtain coating glue to stir and make.
The beneficial effect that the present invention is compared with the prior art is:
In heat dissipating layer preparation method of the present invention, directly will after raw material graphite powder form slurry, be coated in the plane that needs heat radiation by the method for curtain coating or coating, in preparation process, do not relate to the chemical reagent processing procedure of preparing graphite composite powder, high-temperature heating process, can very effectively save preparation cost, preparation process is also pollution-free simultaneously.In preparation process, only relate to the process that slurrying applies, obtain heat dissipating layer after natural drying, preparation method's step is also simpler.Heat dissipating layer preparation method of the present invention, step is simple, and cost is lower.The heat dissipating layer making according to above-mentioned preparation method, its preparation cost is also lower, in preparation process, do not relate to high-temperature heating expanded simultaneously, what the heat dissipating layer that makes finally to make comprised is without expanded native graphite, the heat dissipating layer finally making is native graphite heat dissipating layer, and is no longer soft graphite heat dissipating layer.
Brief description of the drawings
Fig. 1 is the preparation method's of the heat dissipating layer of the specific embodiment of the invention flow chart;
Fig. 2 realizes by casting machine the schematic diagram that curtain coating applies in the preparation method of heat dissipating layer of the specific embodiment of the invention;
Fig. 3 is that the heat dissipating layer making in the specific embodiment of the invention is applied to the structural representation on electro-luminescence display device.
Detailed description of the invention
Below in conjunction with detailed description of the invention and contrast accompanying drawing the present invention is described in further details.
As shown in Figure 1, be the preparation method of heat dissipating layer in the present invention, comprise the following steps:
P1) graphite composite powder, curtain coating are placed in to organic curtain coating solvent with glue and stir, make slurry.
Wherein, graphite composite powder can be the native graphite powders such as existing conventional natural flake graphite, ball-type graphite, micro crystal graphite or amorphous graphite, also can be the graphite composite powder obtaining after high heat-conducting ceramic powders such as being added with the Carbon Materials of bar-shaped, the fibrous or sheet such as CNT, carbon fiber, nano graphite flakes, Graphene, carbon black and aluminium oxide, silica, aluminium nitride, silicon nitride, carborundum, boron nitride on the basis of above-mentioned native graphite powder, also can be the graphite composite powder that above-mentioned native graphite powder obtains through pulverizing, after nodularization.Curtain coating can be PVAC polyvinylalcohol, polyvinyl butyral resin PVB, polytetrafluoroethylene PTFE, Kynoar PVDF or styrene butadiene rubber sbr with glue.Organic curtain coating solvent can be water, ethanol, butanone or 1-METHYLPYRROLIDONE NMP.In this detailed description of the invention, choose 100 grams of natural flake graphites, 1 ~ 10 gram of curtain coating is placed in 100 ~ 500 milliliters of curtain coating etoh solvent uniform stirrings with glue PVB and makes slurry.
Preferably, can be in the process of preparing slurry being placed in organic curtain coating solvent together with graphite composite powder, curtain coating with glue using dispersant or heat conduction powder as filler stirs and makes slurry.Like this, in the heat dissipating layer being finally prepared into, include dispersant, can make the completed state of whole heat dissipating layer better.Dispersant can be castor oil, atoleine or CMC CMC.
P2) at room temperature, described slurry is directly coated in the plane that needs heat radiation by the method for curtain coating or coating.Needing the plane of heat radiation is herein also the heat-delivery surface of heater members, for example, can be the back side of electroluminescence display panel, concrete as the back side of plasma display or LED display panel.
In this detailed description of the invention, realize curtain coating by casting machine and apply.Specific implementation as shown in Figure 2, comprise the height H 1 of the front scraper 1 that casting machine is set, the height H 2 of rear scraper 2, then at room temperature by step P1) slurry 3 that makes flows into and is coated in the plane that needs heat radiation by the direction of curtain coating shown in arrow in figure after flowing through the casting machine edge of a knife with the speed of 5 ~ 20 cm per minute.In figure, mark 4 represents the position of the plane that needs heat radiation.Wherein, can the requirement to slurry curtain coating according to user, it is 50～500 microns that the height H 1 of scraper 1 before casting machine is set, the height H 2 that the rear scraper 2 of casting machine is set is 100～1000 microns.Casting machine height arranges finally can affect the heat conduction and heat radiation of the heat dissipating layer making effect, get Tai Gao or too low meeting is set and causes the heat dissipating layer radiating effect that makes poor.
P3) slurry in natural drying above-mentioned plane, obtains being formed at the heat dissipating layer in above-mentioned plane.
In the preparation method of the heat dissipating layer of this detailed description of the invention, directly will after raw material graphite powder form slurry, be coated in the plane that needs heat radiation by the method for curtain coating or coating, expect product from former, method is simple to operate, do not relate to the embedding processing of chemical reagent, high-temperature heating expanding treatment, and preparation process is pollution-free.Meanwhile, owing to not relating to above-mentioned steps in preparation process, also just save chemical reagent, the use of heating energy consumption, preparation cost is also lower.Be the preparation method of the heat dissipating layer of this detailed description of the invention, step is simple, and cost is lower.
In this detailed description of the invention, also comprise a kind of heat dissipating layer.As shown in Figure 3, for the heat dissipating layer obtaining according to above-mentioned preparation method is applied to the structural representation that forms electroluminescent display on electro-luminescence display device, comprise electroluminescence display panel 5 and the heat dissipating layer 6 that is attached on electroluminescence display panel 5 back sides, wherein, heat dissipating layer 6 is to be at room temperature directly coated on the back side of described electroluminescence display panel by the method for curtain coating or coating by slurry, after natural drying, obtains; Described slurry is to be placed in organic curtain coating solvent by graphite composite powder, curtain coating glue to stir and make.
Wherein, graphite composite powder can be the native graphite powders such as existing conventional natural flake graphite, ball-type graphite, micro crystal graphite or amorphous graphite, also can be the graphite composite powder forming after high heat-conducting ceramic powders such as being added with other Carbon Materials such as CNT, carbon fiber, nano graphite flakes, Graphene, carbon black and aluminium oxide, silica, aluminium nitride, silicon nitride, carborundum, boron nitride on the basis of above-mentioned native graphite powder.Curtain coating can be PVAC polyvinylalcohol, polyvinyl butyral resin PVB, polytetrafluoroethylene PTFE, Kynoar PVDF or styrene butadiene rubber sbr with glue.Organic curtain coating solvent can be water, ethanol, butanone or 1-METHYLPYRROLIDONE NMP.In slurry, also can comprise dispersant or heat conduction powder, dispersant can be castor oil, atoleine or CMC CMC.
From Fig. 2, schematic diagram is known, flat crystal 301 in slurry 3 in graphite composite powder was mixed and disorderly arrangement before by the curtain coating edge of a knife, during fast by the curtain coating edge of a knife, shearing force effect by the curtain coating edge of a knife to slurry, flat crystal in slurry is aligned along shearing force direction, thereby the flat crystal that makes to be finally formed in the graphite in the heat dissipating layer at the electroluminescence display panel back side is high orientation, be to be much higher than perpendicular to carbon-coating direction (being c-axis direction in graphite carbon source sublayer structure) along the thermal conductivity of carbon-coating direction (being a direction of principal axis in graphite carbon source sublayer structure) in graphite molecule.Being finally in Fig. 3, in heat dissipating layer 6, to be parallel on the in-plane being formed by length a width b on electroluminescence display panel 6 surfaces to have high face thermal conductivity, is lower thermal conductivity in thickness d direction.Like this, the face thermal conductivity of heat radiation floor height, make the heat of light emitting display panel 6 parts be passed to fast whole in-plane by heat dissipating layer, the soaking of performance heat dissipating layer adds the effect of heat radiation, the temperature difference in the each region of balance panel, reduce the thermal stress that light emitting display panel is subject to, make active display be not easy to crack and breakage.Replace electroluminescence display panel to carry out verification experimental verification by face glass, the face glass that includes heat dissipating layer of making by preparation method in this detailed description of the invention, soaking is respond well, and peak temperature can decline 1 ~ 5 DEG C.
The heat dissipating layer of this detailed description of the invention, make according to above-mentioned preparation method, do not relate to high-temperature heating expanded in preparation process, the main body composition in the heat dissipating layer that makes finally to make is without expanded native graphite, heat dissipating layer is native graphite heat dissipating layer, and the preparation cost of heat dissipating layer is also lower.It is combined to application with electroluminescent display, is suitable for the production in enormous quantities of the electroluminescent display that comprises heat dissipating layer.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, make without departing from the inventive concept of the premise some substituting or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. a preparation method for heat dissipating layer, is characterized in that: comprise the following steps: 1) graphite composite powder, the curtain coating glue that include flat crystal are placed in to organic curtain coating solvent and stir, make slurry; 2) at room temperature, described slurry is directly coated in by the method for curtain coating in the plane that needs heat radiation; When curtain coating, use casting machine, the front scraper height that described casting machine is set is 50～500 microns, the rear scraper height that described casting machine is set is 100～1000 microns, at room temperature described slurry is flow through after the described casting machine edge of a knife and flows into and be coated in described plane with the speed of 5～20 cm per minute; 3) slurry in natural drying described plane, obtains being formed at the heat dissipating layer in described plane; The height of wherein said front scraper is lower than the height of rear scraper.
2. the preparation method of heat dissipating layer according to claim 1, is characterized in that: in described step 1), also comprise that dispersant is placed in to described organic curtain coating solvent stirring obtains slurry.
3. the preparation method of heat dissipating layer according to claim 1, it is characterized in that: in described step 1), graphite composite powder is native graphite powder, or the graphite composite powder of native graphite powder through pulverizing, obtaining after nodularization, or on the basis of native graphite powder, add the graphite composite powder that Carbon Materials or ceramic powder obtain.
4. the preparation method of heat dissipating layer according to claim 1, is characterized in that: described step 2) in to need the plane of heat radiation be plasma display the back side or the back side of LED display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110432788.XA CN102601026B (en) | 2011-12-21 | 2011-12-21 | Heat dissipation layer and preparation method thereof |
| HK12110539.3A HK1169819A1 (en) | 2011-12-21 | 2012-10-23 | Dispelling heat layer and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110432788.XA CN102601026B (en) | 2011-12-21 | 2011-12-21 | Heat dissipation layer and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102601026A CN102601026A (en) | 2012-07-25 |
| CN102601026B true CN102601026B (en) | 2014-06-11 |
Family
ID=46519011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110432788.XA Active CN102601026B (en) | 2011-12-21 | 2011-12-21 | Heat dissipation layer and preparation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102601026B (en) |
| HK (1) | HK1169819A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171207B (en) * | 2013-03-06 | 2015-03-04 | 厦门理工学院 | Heat sink material and preparation method thereof |
| CN104386948A (en) * | 2013-10-30 | 2015-03-04 | 长沙理工大学 | Fast preparation method of graphite composite material with high thermal conductivity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460661A (en) * | 2003-06-03 | 2003-12-10 | 浙江大学 | Method for preparing functional gradient material by adopting doctor-blade casting process |
| CN1472833A (en) * | 2003-05-22 | 2004-02-04 | 上海交通大学 | High-per formance carbon material preparing method by water-base curtain coating technology |
| EP1777579A1 (en) * | 2005-10-24 | 2007-04-25 | LG Electronics Inc. | Backlight unit having heat dissipating layer, display device having heat dissipating layer, and method for manufacturing heat dissipating layer |
| CN101817083A (en) * | 2010-04-06 | 2010-09-01 | 武汉理工大学 | Casting method for preparing Mg-Cu system density gradient material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1794085A1 (en) * | 2004-10-01 | 2007-06-13 | Imperial Chemical Industries Plc. | Dispersions, films, coatings and composites |
| EP2414286A4 (en) * | 2009-04-03 | 2014-10-29 | Vorbeck Materials Corp | Polymer compositions containing graphene sheets and graphite |
-
2011
- 2011-12-21 CN CN201110432788.XA patent/CN102601026B/en active Active
-
2012
- 2012-10-23 HK HK12110539.3A patent/HK1169819A1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472833A (en) * | 2003-05-22 | 2004-02-04 | 上海交通大学 | High-per formance carbon material preparing method by water-base curtain coating technology |
| CN1460661A (en) * | 2003-06-03 | 2003-12-10 | 浙江大学 | Method for preparing functional gradient material by adopting doctor-blade casting process |
| EP1777579A1 (en) * | 2005-10-24 | 2007-04-25 | LG Electronics Inc. | Backlight unit having heat dissipating layer, display device having heat dissipating layer, and method for manufacturing heat dissipating layer |
| CN101817083A (en) * | 2010-04-06 | 2010-09-01 | 武汉理工大学 | Casting method for preparing Mg-Cu system density gradient material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102601026A (en) | 2012-07-25 |
| HK1169819A1 (en) | 2013-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102367353B (en) | Low thermal conductivity composite thermal insulation paint and preparation method thereof | |
| CN104877496B (en) | Crack-resistant insulated flame-retardant building material coating | |
| CN108192577A (en) | A kind of fire-retardant graphene flexible membrane of high heat conduction and preparation method thereof | |
| CN106633916B (en) | A kind of graphene-based heat-conducting interface material and preparation method thereof | |
| CN105536585A (en) | Dispersion method for carbon nanotubes | |
| CN104627977B (en) | Graphene oxide reinforced composite carbon nanopaper and production method thereof | |
| CN103725263A (en) | Film made from graphene-carbon nanotube composite material and preparation method of film | |
| CN104973590B (en) | Method of preparing high-heat-conductive and high-electric-conductive thin film through dispersion of high-quality graphite powder and graphene with graphene oxide | |
| CN103387225B (en) | A kind of conduction graphite film and preparation method | |
| CN101255055B (en) | Carbon nano-tube zirconium boride-carborundum based material | |
| CN109943075A (en) | A kind of preparation method of the graphene thermally conductive silicone rubber composite material of magnetic aligning | |
| CN105163539A (en) | Zirconia ceramic rear cover having wireless charging function and manufacture method thereof | |
| CN102601026B (en) | Heat dissipation layer and preparation method thereof | |
| CN102898053B (en) | Modified adhesive and preparation method for alumina silicate fiber paperboard | |
| CN104269564B (en) | The preparation method of bipolar plates used for all-vanadium redox flow battery | |
| Xiao et al. | Polybenzimidazole/conductive carbon black composite driven at low voltage for high-temperature heaters | |
| CN108929521B (en) | High-thermal-conductivity and high-electric-conductivity graphene-based composite material and preparation method thereof | |
| CN105188295A (en) | Toughened glass rear cover having wireless charging function and manufacturing method thereof | |
| CN106888548A (en) | A kind of aluminium-based copper-clad laminate and its painting method with graphene/carbon nano-tube composite radiating coating | |
| Chen et al. | An investigation on heat transfer of three-dimensional graphene oxide network shape memory anti-/deicing component | |
| CN116462436A (en) | Conductive aggregate, intelligent cement composite material, and preparation method and application thereof | |
| CN110344099A (en) | A kind of preparation method of high thermal conductivity graphene composite thin film material | |
| CN104927502A (en) | Important component factor for elastic building-material heat-insulation weather-resistant waterproof coating | |
| CN110194910A (en) | Electric heating ink and preparation method thereof with low-work voltage and farsighted infrared emittance | |
| CN104556966A (en) | Preparation method of fumed silica and nanoscale carbon black composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1169819 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1169819 Country of ref document: HK |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180509 Address after: 518055 Qinghua campus, Xili University Town, Nanshan District, Shenzhen, Guangdong Co-patentee after: Tsinghua University Patentee after: Graduate School at Shenzhen, Tsinghua University Address before: 518055 Qinghua campus, Xili University Town, Nanshan District, Shenzhen, Guangdong Patentee before: Graduate School at Shenzhen, Tsinghua University |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190808 Address after: 518000 15th Floor, Building A1, Smart City, China Merchants Bureau, Fenghuang Street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Graphene Innovation Center Co., Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili of Tsinghua Co-patentee before: Tsinghua University Patentee before: Graduate School at Shenzhen, Tsinghua University |