CN103131274B - A kind of Fluororesin heat radiation paint and preparation method thereof - Google Patents
A kind of Fluororesin heat radiation paint and preparation method thereof Download PDFInfo
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- CN103131274B CN103131274B CN201310089504.0A CN201310089504A CN103131274B CN 103131274 B CN103131274 B CN 103131274B CN 201310089504 A CN201310089504 A CN 201310089504A CN 103131274 B CN103131274 B CN 103131274B
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- 230000005855 radiation Effects 0.000 title claims abstract description 52
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
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- 238000000576 coating method Methods 0.000 claims abstract description 90
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 20
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 15
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- 239000004408 titanium dioxide Substances 0.000 claims abstract description 11
- LLYXJBROWQDVMI-UHFFFAOYSA-N 2-chloro-4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1Cl LLYXJBROWQDVMI-UHFFFAOYSA-N 0.000 claims abstract description 10
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- 229920005989 resin Polymers 0.000 claims description 19
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- 239000003795 chemical substances by application Substances 0.000 claims description 13
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- 239000004593 Epoxy Substances 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 229920001038 ethylene copolymer Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
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- 239000000470 constituent Substances 0.000 claims 1
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
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- 229910000838 Al alloy Inorganic materials 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 2
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- 239000002033 PVDF binder Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical class CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
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- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 description 1
- 235000013569 fruit product Nutrition 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
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Abstract
The invention discloses a kind of Fluororesin heat radiation paint and preparation method thereof, coating is mainly made up of the additives such as electron transfer type organic compound, Graphene, CNT, titanium dioxide and fluororesin.Wherein fluororesin is the coating brand that current combination property is the highest；Electron transfer type organic compound can be greatly improved the thermal emissivity rate of coating；Graphene and CNT can further speed up the conduction of heat；Electron transfer type organic compound, CNT and Graphene ultimately form the full three-dimensional network distribution of granule (electron transfer type organic compound)+line (CNT)+plane (Graphene) at internal fluid.Fluororesin heat radiation paint of the present invention has high-heating radiation rate, high thermal conductivity and low grade fever resistance, has from peace and quiet, acid and alkali-resistance, superpower insulating properties, have stronger practical value while radiation cooling.
Description
Technical field
The present invention relates to a kind of heat radiation coating, be specifically related to a kind of Fluororesin heat radiation paint and preparation method thereof.
Background technology
Along with the high speed development of electronics industry, modern electronic equipment is increasingly becoming the highly integrated system of High Density Packaging, and this makes the heat flow density of product increasingly become big.Heat-sinking capability such as fruit product is not enough, and parts and circuit temperature rise, and will make equipment thermal deformation and thermal failure, have influence on performance and the life-span of electronic product.It addition, in the industry fields such as metallurgy, petrochemical industry, pottery, medicine, often relate to the bodies of heater such as various Industrial Boiler, station boiler, flame furnace, its heat dispersion is most important to the safety of personnel and the reliability service of equipment.Therefore, the heat dispersion how improving electronics industry and other field has become the important topic advancing industrial progress.
For system radiating problem; frequently with actively and passive radiating mode, and many workplaces due to mechanical vibration and mechanicalness noise, power can not be had less and require the reason inconvenience such as heat radiation low cost, size or structure install fan and require strengthen dispel the heat while the situation such as protection metallic matrix.Therefore, the coating at all types of industries spreader surface coating high radiant rate improves its heat dispersion, and combining heat loss through radiation while Natural Heat Convection will be effectively radiating mode, have irreplaceable advantage in some cases.Such as at aerospace field, the waste heat of universe spacecraft finally can only distribute by the way of irradiator is with radiation, and High Radiant Rate Coating receives much attention as important strengthening heat loss through radiation material.
Research in terms of heat-dissipation paint is the most few the most both at home and abroad, it is confined to solvent based coating, in Chinese Patent Application No. CN200810146607.5 heat radiation coating and preparation method thereof, use silicones and organic solvent, add carborundum, aluminium powder and zinc oxide and prepare heat radiation coating；The preparation force method of 201110165349.7 1 kinds of temperature resistant non-halogen fire resistant ultraviolet curing the moon solder paste ink of Chinese Patent Application No., propylene oxide acids photosensitive resin, light trigger, epoxy resin, firming agent, filler, diluent etc. is used to prepare heat radiation coating, its ink composition added is poor with the Combination of inorganic heat filling, affects coating property.
The solvent type resin of research typically uses acrylic resin, polyurethane resin and organic siliconresin at present, and its hardening time generally requires about one hour, and solidification temperature needs to reach 150 degree Celsius, and production cost is high and causes certain environmental pollution；And among various resins, fluorine resin coating is big due to the fluorine element electronegativity introduced, carbon-fluorine bond can be strong, its weatherability, thermostability, lower temperature resistance, chemical proofing are strong, and there is the non-sticky and low abrasiveness of uniqueness, it is the coating brand that current combination property is the highest, and uses fluororesin to prepare heat radiation coating, the most not yet have been reported that.
In existing heat radiation coating, filler is generally metal material and graphite material.The thermal conductivity of graphite powder is typically at 150-300W/ (M K), and the argentum powder that in metal material, thermal conductivity is superior is also only 429W/ (M K), and expensive, and the raising to coating bulk thermal conductivity helps limited.And the thermal conductivity of single-layer graphene is 3080-5150W/ (M K), the thermal conductivity of multi-layer graphene is general also at more than 1500W/ (M K), far above graphite powder and the thermal conductivity of argentum powder, as the application in terms of heat radiation coating additive, have not yet to see report.
It addition, the present invention is by adding electron transfer type organic compound, on the basis of there is superior heat-resisting heat conductivility, increases substantially the thermal emissivity rate of heat radiation coating, improve the heat dispersion of coating.
Finally, the present invention improves the problem of heat filling Combination difference in heat radiation coating by adding CNT, it has good combination interface with resin, be conducive to its dispersion in resin, filler and the compatibility of resin and affinity can be improved, thus reduce the thermal contact resistance between interface, improve heat conductivity, ultimately form the three-dimensional macroreticular heat conduction system in " point-line-face ".
To sum up analyze, use the fluororesin of superior performance and change heat sinking coating prepared by additive composition to have very wide applications.
Summary of the invention
It is an object of the invention to provide that a kind of heat transfer efficiency, radiation efficiency be higher, the more preferable novel Fluororesin heat radiation paint of radiating effect.
The purpose of the present invention is achieved through the following technical solutions:
A kind of Fluororesin heat radiation paint, compositions includes fluororesin, special diluting agent, filler, firming agent, and its weight proportion is as follows:
Fluororesin 40 %～60%
Special diluting agent 40%～50%
Filler 2%～10%
Firming agent 2%～5%
Wherein, described fluororesin is the one in fluorocarbon resin and fluorine silicon resin or a combination thereof.
Wherein, described fluorocarbon resin is specially one or a combination thereof of politef (PTFE), polytrifluorochloroethylene (PCTFE), Kynoar (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoro-ethylene copolymer (ECTFE), polyvinyl fluoride (PVF) etc..
Wherein, described special diluting agent is one or a combination thereof thing of lacquer thinner, phenolic paint diluent, acrylic paint diluent, epoxy lacquer diluent, organosilicon coating diluent etc..
Wherein, described filler is Graphene, electron transfer type organic compound, CNT, the one of titanium dioxide or a combination thereof.
Wherein, the purity >=95wt% of described CNT, ash≤0.2wt%, specific surface area is about 40～300m2/g。
Wherein, described titanium dioxide is rutile-type or the one of anatase titanium dioxide or a combination thereof.
Wherein, described heat radiation coating also includes other additive components such as optional stabilizer, levelling agent, coloring agent, thixotropic agent.
A kind of Fluororesin heat radiation paint, each composition weight proportioning is as follows:
Fluororesin 40 %～60%
Special diluting agent 40%～50%
Graphene 1%～2%
Electron transfer type organic compound 2%～5%
CNT 0.1～0.2%
Titanium dioxide 0.5%～1%
Firming agent 2%～5%
A kind of Fluororesin heat radiation paint, its preparation process is:
(1) press component proportion, fluororesin is mixed with special diluting agent, form resin compound；
(2) take the resin compound of all-mass in step (1), mix with CNT, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(3) take the coating of all-mass in step (2), mix with Graphene, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(4) take the coating of all-mass in step (3), mix with electron transfer type organic compound, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(5) take the coating of all-mass in step (4), mix with titanium dioxide, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(6) take the coating of all-mass in step (5), mix homogeneously with firming agent, form target coating, stand-by after standing 15 minutes.
Optionally component, some conventional additives or filler can also join in heat radiation coating mixture of the present invention, and premise is that the addition of these optional components will not weaken the purpose of the present invention.These optional components include: stabilizer, levelling agent, coloring agent, thixotropic agent etc..
Compared with prior art, Fluororesin heat radiation paint of the present invention provides the benefit that:
(1) among various resins, fluorine resin coating is big due to the fluorine element electronegativity introduced, and carbon-fluorine bond can be strong, and its weatherability, thermostability, lower temperature resistance, chemical proofing are strong, and there is the non-sticky and low abrasiveness of uniqueness, it is the coating brand that current combination property is the highest.Specifically, this heat radiation coating has automatically cleaning, acid and alkali-resistance function, it is adaptable to high salinity mist and the city of high Acid Rain Zone, also has the generation of the short circuit accident of the core components such as superpower insulating properties, enough prevention transformator.
(2) thermal conductivity as the single-layer graphene of one of additive is 3080-5150W/ (M K), the thermal conductivity of multi-layer graphene is at more than 1500W/ (M K), far above the 150-300W/ (M K) and the 429W/ (M K) of argentum powder of graphite powder.The heat conductivity that the addition of Graphene makes system overall is enhanced.
(3) CNT there was added beneficially its dispersion in resin, and thus can form an effective heat conduction network in resin, reduce the thermal contact resistance between interface, reach improve coating heat transfer performance and extend the purpose in its service life.
(4) selecting electron transfer type organic compound as filler, its temperature-sensing discoloration function can make heat dissipation equipment have self-checking function, it is possible to judges its Temperature Distribution according to the distribution of color of spreader surface；Amount of heat can be siphoned away at short notice as a kind of phase-change material, at Enhanced Radiation Reduced Blast rate auxiliary heat dissipation simultaneously, play effect of quick heat radiating.
(5) CNT, Graphene and filler are formed by the present invention as the basic of additive, finally define the full three-dimensional network distribution in " point-line-face " in the coating, there is high thermal conductivity and radiance, substantially increase radiating efficiency and the service life of product facility, there is practical value widely.
Detailed description of the invention
Further describing the present invention, advantages of the present invention and feature below in conjunction with embodiment will be clearer along with description, but is not intended as being the present invention foundation of any restriction.It will be understood by those skilled in the art that after having read the present invention, the amendment of the various equivalent form of values of the present invention or replace all is fallen within scope.
Most preferred embodiment 1
Following components by weight ratio, the fluororesin of 50%, the special diluting agent of 40%, the electron transfer type organic compound of 4%, the Graphene of 1%, the CNT of 1%, the titanium dioxide of 1%, the firming agent of 3% stir under the conditions of room temperature 800-1000 rev/min after mixing by step and form target coating.Deoil to the product facility surface needing to spray heat radiation coating, decontamination cleaning processes, and pours spray gun after being sufficiently stirred for by target coating into, and spray gun pressure is set to 0.4MPa, alignment target surface, both distances are 10-20cm, and spraying 2-3 time, makes coating uniform fold body surface back and forth.Coating uniform, glossy, its thickness can optimized choice as required, coating can toast 10 minutes fast setting in solidifying 12 hours with natural air drying or be placed in baking oven.
Comparative example 2
Following components by weight ratio, the fluororesin of 50%, the special diluting agent of 40%, the electron transfer type organic compound of 6%, the titanium dioxide of 1%, the firming agent of 3% stir under the conditions of room temperature 800-1000 rev/min after mixing by step and form target coating.Deoil to the product facility surface needing to spray heat radiation coating, decontamination cleaning processes, and pours spray gun after being sufficiently stirred for by target coating into, and spray gun pressure is set to 0.4MPa, alignment target surface, both distances are 10-20cm, and spraying 2-3 time, makes coating uniform fold body surface back and forth.Coating uniform, glossy, its thickness can optimized choice as required, coating can toast 10 minutes fast setting in solidifying 12 hours with natural air drying or be placed in baking oven.
Experimental data compares
1, most preferred embodiment heat radiation coating radiating effect contrast test
Taking the fin that two blocks of aluminium alloys make, a size of 100mm × 50mm × 15mm, fin number is 6.The heat radiation coating that one of spraying is prepared by preferred embodiment, another block does blank, does not spray heat radiation coating, is designated as blank example.The above-mentioned two fin back side connects 10WLED chip respectively, and is connected on D.C. regulated power supply form LED test system, stand-by.LED chip with fin connect thermocouple probe respectively, after starting experiment, records each channel temperature data.Test temperature is room temperature 25 DEG C.
Table 1 most preferred embodiment and blank example coating heat radiation contrast test result
Can be clearly seen from table 1, the chip temperature rise after spraying is substantially slow than the chip temperature rise not sprayed, and from chip with the fin temperature difference it can be seen that temperature approach is all at about 1 DEG C after spraying most preferred embodiment coating, and the temperature difference not sprayed is up to 10.5 DEG C.After spraying, chip reduces about 5 DEG C with the chip final temperature not sprayed, and after spraying is described, system radiating ability is stronger；And the fin surface temperature of sprayed coating exceeds about 3 DEG C than the fin surface temperature not sprayed, illustrate that the cooling system spraying the heat radiation coating of most preferred embodiment has more preferable thermal radiation capability, the temperature that chip produces is radiate with higher efficiency, thus reduce the temperature of LED chip, improve overall radiating efficiency.
2, most preferred embodiment and comparative example heat radiation coating radiating effect contrast test
Taking the fin that two blocks of aluminium alloys make, a size of 100mm × 50mm × 15mm, fin number is 6.The heat radiation coating of one piece of spraying preferred embodiment, another block spraying comparative example heat radiation coating.The above-mentioned two fin back side connects 10WLED chip respectively, and is connected on D.C. regulated power supply form LED test system, stand-by.LED chip with fin connect thermocouple probe respectively, after starting experiment, records each channel temperature data.Test temperature is room temperature 25 DEG C.
Table 2 most preferred embodiment and blank example heat radiation coating contrast test result
From Table 2, it can be seen that the chip of most preferred embodiment is compared with the chip temperature of comparative example, reduce 2.3 DEG C, illustrate to add most preferred embodiment system radiating ability relatively strong,；And correspondence fin surface temperature exceeds 1 DEG C than embodiment fin surface temperature.Chip is found out with the contrast of the fin temperature difference, the most preferred embodiment temperature difference is about 1 DEG C, and the temperature difference is 3.6 DEG C to the maximum in comparative example, illustrate most preferred embodiment to add CNT, Graphene as additive, the full three-dimensional network distribution in " point-line-face " can be defined in the coating, there is high thermal conductivity and thermal emissivity rate.The cooling system of the heat radiation coating of most preferred embodiment has more preferable thermal radiation capability, the temperature that chip produces is radiate with higher efficiency, thus reduce the temperature of LED chip, improve radiating efficiency and the service life of product facility, there is practical value widely.
3, to sum up, fluororesin selected by the present invention, have more more preferable combination property than conventional resins, separately electron transfer type organic compound, CNT, Graphene are formed as the basic of additive, the full three-dimensional network distribution of line-face-body is finally defined at internal fluid, improve thermal conductivity and thermal emissivity rate, improve radiating efficiency and the combination property thereof of heat radiation coating, there is stronger practical value.
Claims (5)
1. the preparation method of a Fluororesin heat radiation paint coating, it is characterised in that: the Fluororesin heat radiation paint that this coating production is used includes fluororesin, special diluting agent, filler, firming agent, and its quality proportioning is as follows,
Fluororesin 40 %～50%,
Special diluting agent 40%～50%,
Filler 2%～10%,
Firming agent 2%～5%,
Described filler constituent is made up of electron transfer type organic compound, CNT, Graphene and titanium dioxide；
Described filler composition quality ratio is:
Electron transfer type organic compound 40%～60%,
CNT 5%～10%,
Graphene 20%～40%,
Titanium dioxide 10%～20%；
The preparation method of described coating comprises the following steps,
(1) press component proportion, fluororesin is mixed with special diluting agent, form resin compound；
(2) take the resin compound of all-mass in step (1), mix with CNT, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(3) take the coating of all-mass in step (2), mix with Graphene, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(4) take the coating of all-mass in step (3), mix with electron transfer type organic compound, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(5) take the coating of all-mass in step (4), mix with titanium dioxide, stir under the conditions of room temperature 800-1000 rev/min, form coating；
(6) take the coating of all-mass in step (5), mix homogeneously with firming agent, form target coating, stand-by after standing 15 minutes；
(7) needed the product facility surface of coating objective coating to deoil, decontamination cleaning processes, spray gun is poured into after being sufficiently stirred for by target coating, spray gun pressure is set to 0.4MPa, alignment target surface, both distances are 10-20cm, spraying 2-3 time back and forth, makes coating uniform fold body surface, forms coating；
(8) coating natural air drying solidifies 12 hours or is placed in 10 minutes fast setting of baking in baking oven；
CNT, Graphene and other fillers define the full three-dimensional network distribution in " point-line-face " in the coating；
Described special diluting agent is the one in lacquer thinner, phenolic paint diluent, acrylic paint diluent, epoxy lacquer diluent, organosilicon coating diluent or a combination thereof thing.
2. the preparation method of Fluororesin heat radiation paint coating as claimed in claim 1, it is characterised in that: described fluororesin is politef, polytrifluorochloroethylene, Kynoar, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoro-ethylene copolymer, the one of polyvinyl fluoride or a combination thereof.
3. the preparation method of Fluororesin heat radiation paint coating as claimed in claim 1 or 2, it is characterised in that: the purity >=95wt% of described CNT, ash≤0.2wt%, specific surface area is 40～300m2/g。
4. the preparation method of Fluororesin heat radiation paint coating as claimed in claim 1 or 2, it is characterised in that: described titanium dioxide is rutile-type or the one of anatase titanium dioxide or a combination thereof.
5. the preparation method of Fluororesin heat radiation paint coating as claimed in claim 1 or 2, it is characterised in that: described heat radiation coating also includes one or more in stabilizer, levelling agent, coloring agent, thixotropic agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103351738A (en) * | 2013-06-19 | 2013-10-16 | 天长市驰程电子科技有限公司 | Fluororesin heat dissipation coating and preparation method thereof |
| CN103360804B (en) * | 2013-07-24 | 2016-01-20 | 刘新利 | A kind of graphite radiating coating and preparation method thereof |
| CN103555087B (en) * | 2013-09-25 | 2016-03-02 | 天长市天泰光电科技有限公司 | Fluororesin heat radiation paint of a kind of LED and preparation method thereof |
| AR099038A1 (en) * | 2014-01-08 | 2016-06-22 | General Cable Tech Corp | COVERED AIR CONDUCTOR |
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