CN106751268A - A kind of high-performance heat sink material for LED light source - Google Patents
A kind of high-performance heat sink material for LED light source Download PDFInfo
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- CN106751268A CN106751268A CN201611108115.8A CN201611108115A CN106751268A CN 106751268 A CN106751268 A CN 106751268A CN 201611108115 A CN201611108115 A CN 201611108115A CN 106751268 A CN106751268 A CN 106751268A
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- heat sink
- sink material
- light source
- performance heat
- led light
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a kind of high-performance heat sink material for LED light source, its preparation process is as follows：Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, obtains dispersion liquid；Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heats 2 4h until being completely dissolved；Step 4, age resister and thickener are added the reaction solution in step 2, the 5h of heated sealed 3；Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, 3 8h of oil bath concentration reaction, you can obtain high-performance heat sink material.The inventive method is easy, and process conditions are gentle, low production cost, and material structure stabilization, thermal diffusivity is good.
Description
Technical field
The invention belongs to technical field of heat dissipation, and in particular to a kind of high-performance heat sink material for LED light source.
Background technology
In the manufacture field of light emitting diode (LED), due to the limitation of technology, the photoelectric transformation efficiency of LED need to be carried
Height, especially large-power LED light bead, because its power is higher, about more than 60% electric energy will become heat energy release, and this is just right
The thermal diffusivity of large-power light-emitting diodes proposes requirement higher.In the prior art, typically heat-conducting silicone grease is coated in
On aluminum fin or copper heat spreader, but it is known that the thermal conductivity factor of aluminium is about 200W/mK, and general heat-conducting silicone grease
Thermal conductivity factor there was only 1- 2W/mK, which results in some cases, silicone grease into hindering one of factor of heat transfer, from
For in theory, both thermal conductivity factors are closer to then heat transfer efficiency is higher, but according to the restriction of prior art, heat-conducting silicone grease
Thermal conductivity factor be difficult break through 4W/mK, this virtually also have impact on the heat dispersion of LED.And when exploitation is with higher
When the silicone grease of thermal conductivity factor runs into bottleneck, we should look for another way, it is intended to go to attempt the new height of exploitation from the angle of fin
Imitate compound heat sink material.
The content of the invention
It is an object of the invention to provide a kind of high-performance heat sink material for LED light source, the inventive method is easy, technique
Mild condition, low production cost, material structure stabilization, thermal diffusivity is good.
A kind of high-performance heat sink material for LED light source, its preparation process is as follows：
Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；
Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, is disperseed
Liquid；
Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heating 2-4h is until be completely dissolved；
Step 4, age resister and thickener are added the reaction solution in step 2, heated sealed 3-5h；
Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, oil bath concentration reaction 3-8h,
Can obtain high-performance heat sink material.
The preparation formula of the heat sink material is as follows：
Graphite 15-18 parts, aluminium nitride 5-7 parts, absolute ethyl alcohol 30-40 parts, dispersant 2-4 parts, polyvinyl alcohol 10-15 parts, poly- second
Glycol 10-15 parts, age resister 1-3 parts, thickener 1-3 parts.
The dispersant is using in vinyl bis-stearamides, glyceryl monostearate or glyceryl tristearate
Kind.
The age resister uses UV-531.
The thickener uses chitosan.
Ball milling crushes ball milling using constant temperature in the step 1, and thermostat temperature is 60-90 DEG C；The step uses constant temperature ball milling
It is prevented from the too high structure brought of temperature to destroy, it is ensured that the stability of graphite and aln structure.
Powder rate of addition in the step 2 is 5-10g/min, and the supersonic frequency is 3-12MHz, when described ultrasonic
Between be 10-15min；The step, being capable of rapid dispersion, the splendid liquid of formation dispersiveness by ultrasound and dropwise addition powder mode.
The pressure of the constant pressure heating in the step 3 is 10-15MPa, and temperature is 80-100 DEG C；The step is by heating energy
Enough promote dissolving of the polyvinyl alcohol in polyethylene glycol and dispersion, form good dispersing and dissolving liquid.
Heated sealed temperature in the step 4 is 130-150 DEG C.
Speed is slowly added dropwise for 15-30mL/min in the step 5, and the oil bath thickening temperature is 120-150 DEG C, institute
The concentrate for stating concentration reaction is the 30-50% before concentration；The step can fully be mixed graphite and aluminium nitride by the way that mixing is added dropwise
Close in polyvinyl alcohol, then by concentration, solvent is gone out to reclaim, the viscosity of heat sink material is increased, while reducing
Space between graphite and graphite, between graphite and aluminium nitride, mentions radiating efficiency.
Compared with prior art, the invention has the advantages that：
1st, the inventive method is easy, and process conditions are gentle, low production cost, and material structure stabilization, thermal diffusivity is good.
2nd, the present invention can not only ensure thermal diffusivity using heat-conductive bonding agent as the binding agent between graphite and aluminium nitride
Stabilization and radiating effect continue.
3rd, the present invention is applied to the LED lamp of relatively high power, and thermal diffusivity is good, non-aging, breakage.
Specific embodiment
The present invention is described further with reference to embodiment：
Embodiment 1
A kind of high-performance heat sink material for LED light source, its preparation process is as follows：
Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；
Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, is disperseed
Liquid；
Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heating 2h is until be completely dissolved；
Step 4, age resister and thickener are added the reaction solution in step 2, heated sealed 3h；
Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, oil bath concentration reaction 3h, i.e.,
Can obtain high-performance heat sink material.
The preparation formula of the heat sink material is as follows：
It is 15 parts of graphite, 5 parts of aluminium nitride, 30 parts of absolute ethyl alcohol, 2 parts of dispersant, 10 parts of polyvinyl alcohol, 10 parts of polyethylene glycol, anti-ageing
1 part of agent, 1 part of thickener.
The dispersant uses vinyl bis-stearamides.
The age resister uses UV-531.
The thickener uses chitosan.
Ball milling crushes ball milling using constant temperature in the step 1, and thermostat temperature is 60 DEG C.
Powder rate of addition in the step 2 is 5g/min, and the supersonic frequency is 3MHz, and the ultrasonic time is
10min。
The pressure of the constant pressure heating in the step 3 is 10MPa, and temperature is 80 DEG C.
Heated sealed temperature in the step 4 is 130 DEG C.
Speed is slowly added dropwise for 15mL/min in the step 5, and the oil bath thickening temperature is 120 DEG C, the concentration
The concentrate of reaction is 30% before concentrating.
Embodiment 2
A kind of high-performance heat sink material for LED light source, its preparation process is as follows：
Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；
Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, is disperseed
Liquid；
Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heating 4h is until be completely dissolved；
Step 4, age resister and thickener are added the reaction solution in step 2, heated sealed 5h；
Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, oil bath concentration reaction 8h, i.e.,
Can obtain high-performance heat sink material.
The preparation formula of the heat sink material is as follows：
It is 18 parts of graphite, 7 parts of aluminium nitride, 40 parts of absolute ethyl alcohol, 4 parts of dispersant, 15 parts of polyvinyl alcohol, 15 parts of polyethylene glycol, anti-ageing
3 parts of agent, 3 parts of thickener.
The dispersant uses glyceryl monostearate.
The age resister uses UV-531.
The thickener uses chitosan.
Ball milling crushes ball milling using constant temperature in the step 1, and thermostat temperature is 90 DEG C.
Powder rate of addition in the step 2 is 10g/min, and the supersonic frequency is 12MHz, and the ultrasonic time is
15min。
The pressure of the constant pressure heating in the step 3 is 15MPa, and temperature is 100 DEG C.
Heated sealed temperature in the step 4 is 150 DEG C.
Speed is slowly added dropwise for 30mL/min in the step 5, and the oil bath thickening temperature is 150 DEG C, the concentration
The concentrate of reaction is 50% before concentrating.
Embodiment 3
A kind of high-performance heat sink material for LED light source, its preparation process is as follows：
Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；
Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, is disperseed
Liquid；
Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heating 3h is until be completely dissolved；
Step 4, age resister and thickener are added the reaction solution in step 2, heated sealed 4h；
Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, oil bath concentration reaction 5h, i.e.,
Can obtain high-performance heat sink material.
The preparation formula of the heat sink material is as follows：
It is 16 parts of graphite, 6 parts of aluminium nitride, 35 parts of absolute ethyl alcohol, 3 parts of dispersant, 12 parts of polyvinyl alcohol, 13 parts of polyethylene glycol, anti-ageing
2 parts of agent, 2 parts of thickener.
The dispersant uses glyceryl tristearate.
The age resister uses UV-531.
The thickener uses chitosan.
Ball milling crushes ball milling using constant temperature in the step 1, and thermostat temperature is 80 DEG C.
Powder rate of addition in the step 2 is 8g/min, and the supersonic frequency is 8MHz, and the ultrasonic time is
13min。
The pressure of the constant pressure heating in the step 3 is 13MPa, and temperature is 90 DEG C.
Heated sealed temperature in the step 4 is 140 DEG C.
Speed is slowly added dropwise for 25mL/min in the step 5, and the oil bath thickening temperature is 130 DEG C, the concentration
The concentrate of reaction is 40% before concentrating.
The heat sink material of embodiment 1-3 is tested
| Embodiment | Heat storage capacity（J/g） | Heat emission rate | Thermal conductivity factor W/ (mK) | Heatproof temperature DEG C |
| Embodiment 1 | 30 | 0.95 | 40 | 150 |
| Embodiment 2 | 36 | 0.96 | 43 | 162 |
| Embodiment 3 | 42 | 0.97 | 47 | 173 |
One embodiment of the invention is the foregoing is only, the side of the present invention, all use equivalents or equivalent transformation is not intended to limit
The technical scheme that formula is obtained, all falls within protection scope of the present invention.
Claims (10)
1. a kind of high-performance heat sink material for LED light source, it is characterised in that its preparation process is as follows：
Step 1, is put into graphite and aluminium nitride ball mill and is pre-processed, and mixed powder is obtained after drying；
Step 2, the mixed powder in step 1 is slowly added into absolute ethyl alcohol, adds dispersant quickly ultrasonic, is disperseed
Liquid；
Step 3, polyvinyl alcohol is added to polyethylene glycol, and constant pressure heating 2-4h is until be completely dissolved；
Step 4, age resister and thickener are added the reaction solution in step 2, heated sealed 3-5h；
Step 5, reaction solution in step 4 is slowly added to by the dispersion liquid in step 2, after being added dropwise to complete, oil bath concentration reaction 3-8h,
Can obtain high-performance heat sink material.
2. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the radiating
The preparation formula of material is as follows：
Graphite 15-18 parts, aluminium nitride 5-7 parts, absolute ethyl alcohol 30-40 parts, dispersant 2-4 parts, polyvinyl alcohol 10-15 parts, poly- second
Glycol 10-15 parts, age resister 1-3 parts, thickener 1-3 parts.
3. a kind of high-performance heat sink material for LED light source according to claim 2, it is characterised in that the dispersion
Agent is using the one kind in vinyl bis-stearamides, glyceryl monostearate or glyceryl tristearate.
4. a kind of high-performance heat sink material for LED light source according to claim 2, it is characterised in that described anti-ageing
Agent uses UV-531.
5. a kind of high-performance heat sink material for LED light source according to claim 2, it is characterised in that the thickening
Agent uses chitosan.
6. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the step 1
Middle ball milling crushes ball milling using constant temperature, and thermostat temperature is 60-90 DEG C.
7. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the step 2
In powder rate of addition be 5-10g/min, the supersonic frequency be 3-12MHz, the ultrasonic time be 10-15min.
8. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the step 3
In constant pressure heating pressure be 10-15MPa, temperature be 80-100 DEG C.
9. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the step 4
In heated sealed temperature be 130-150 DEG C.
10. a kind of high-performance heat sink material for LED light source according to claim 1, it is characterised in that the step
Speed is slowly added dropwise for 15-30mL/min in 5, the oil bath thickening temperature is 120-150 DEG C, the concentration of the concentration reaction
Liquid is the 30-50% before concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611108115.8A CN106751268A (en) | 2016-12-06 | 2016-12-06 | A kind of high-performance heat sink material for LED light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611108115.8A CN106751268A (en) | 2016-12-06 | 2016-12-06 | A kind of high-performance heat sink material for LED light source |
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| Publication Number | Publication Date |
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| CN106751268A true CN106751268A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611108115.8A Pending CN106751268A (en) | 2016-12-06 | 2016-12-06 | A kind of high-performance heat sink material for LED light source |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550330A (en) * | 2009-05-18 | 2009-10-07 | 浙江大学 | Lightweight high heat conductive composite material and preparation method thereof |
| US20130116371A1 (en) * | 2011-11-08 | 2013-05-09 | Kenner Material & System Co., Ltd. | Thermally Conductive and Flame-Retarded Compositions |
| CN105885418A (en) * | 2015-12-14 | 2016-08-24 | 湖南工业大学 | Aluminum nitride/graphene composite thermally conductive silicone grease and preparing method thereof |
-
2016
- 2016-12-06 CN CN201611108115.8A patent/CN106751268A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550330A (en) * | 2009-05-18 | 2009-10-07 | 浙江大学 | Lightweight high heat conductive composite material and preparation method thereof |
| US20130116371A1 (en) * | 2011-11-08 | 2013-05-09 | Kenner Material & System Co., Ltd. | Thermally Conductive and Flame-Retarded Compositions |
| CN105885418A (en) * | 2015-12-14 | 2016-08-24 | 湖南工业大学 | Aluminum nitride/graphene composite thermally conductive silicone grease and preparing method thereof |
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Application publication date: 20170531 |