CN105542464A - Nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material for LED and preparation method of heat dissipation material - Google Patents
Nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material for LED and preparation method of heat dissipation material Download PDFInfo
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Abstract
The invention discloses a nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material for an LED. According to the compound plastic, nanometer kaolin generated after high-temperature modification with nanometer lanthanum oxide serves as toughening and reinforcing filler, the surface of the nanometer kaolin is doped and mixed with stearic acid, the modified filler and polyphenylene sulfide have good compatibility, the agglomeration phenomenon among nanometer particles is effectively lowered, scattered associativity is better in the mixed melting process with the polyphenylene sulfide, the machining property and mechanical property of the polyphenylene sulfide are effectively improved, and adsorption and combination of modified masterbatch with nanometer lithium iron phosphate, nanometer silicon nitride and other high-thermal-conductivity filler are better, so that the composite material which is better in both mechanical property and thermal conductivity property is prepared, and the nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material has wide application space on the aspect of LED packaging.
Description
Technical field
The present invention relates to heat-conducting plastic preparing technical field, particularly relate to a kind of LED nano lanthanum oxide modified kaolin and strengthen polyphenylene sulfide ether heat sink material and preparation method thereof.
Background technology
LED is as the novel light source of a generation, there is efficient, energy-saving and environmental protection, long service life, be easy to safeguard etc. advantage, by the pre-third generation light source for incandescent light and luminescent lamp can be replaced, the working temperature of the light extraction efficiency of LED and life-span and chip has direct relation, heat dissipation problem is the subject matter that restriction packaged LED product improves power and luminous efficiency, the effective means solving LED heat dissipation problem be exactly utilize high heat conduction, high insulation, high permeability material heat is passed fast.
The heat sink material that current LED is commonly used is mainly metal aluminium or stupalith, all there are some defects in actual use in these materials, although such as aluminium base heat sink material has comparatively excellent heat-sinking capability, but its exist the moulding process cycle long, itself there is electroconductibility and the problem such as moulding is single, and although stupalith insulate, but higher than great, shaping difficulty, be unfavorable for batch production, its application is also restricted.
Polyphenylene sulfide is a kind of crystallinity, thermoplastic special engineering plastic, its over-all properties is superior, there is excellent thermotolerance, insulativity, erosion resistance, good stability of the dimension etc. advantage, its encapsulating plastics as LED lamp are particularly suitable, improving its thermal conductivity is a vital link, the method of common raising polyphenylene sulfide plastic thermal conductivity is blending high conduction powder in the plastic, but ubiquity plastic substrate intensity reduces in actual applications, mechanical property weakens, problem that heat-conducting effect is not good etc., application is restricted, along with the development on a large scale of high-power LED lamp, industry is badly in need of improving existing technique, to obtain the matrix material with the heat-conducting effect of efficient stable.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of LED nano lanthanum oxide modified kaolin to strengthen polyphenylene sulfide ether heat sink material and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of LED nano lanthanum oxide modified kaolin strengthens polyphenylene sulfide ether heat sink material, and this composite plastic is made up of the raw material of following weight part: nano lanthanum oxide 0.1-0.2, polyphenylene sulfide 50-60, nano-grade lithium iron phosphate 1-2, nano-silicon nitride 8-10, silane coupling agent 0.4-0.5, nano kaoline 3-4, calcium zinc stabilizer 1-2, stearic acid 0.5-0.6, dehydrated alcohol 8-10, deionized water are appropriate.
Described a kind of LED nano lanthanum oxide modified kaolin strengthens polyphenylene sulfide ether heat sink material and preparation method thereof, and described preparation method is:
(1) first by nano lanthanum oxide, nano kaoline, deionized water drops in high-energy mills, abundant ground and mixed 40-50min, by fully dry for mixture removing moisture after grinding terminates, subsequently gained composite granule is heated to 700-800 DEG C with the temperature rise rate of 15-20 DEG C under nitrogen atmosphere, insulation calcining 1-1.5h, room temperature is naturally cooled to after calcining terminates, obtain nano lanthanum oxide modified Nano kaolinite compound powder, last again by this powder and stearic acid, dehydrated alcohol mixes, heating in water bath is to 70-80 DEG C, after high-speed mixing stirs 1.5-2h, complete drying removes ethanol, the grinding of gained crushing material is for subsequent use,
(2) drop in high-speed mixer together with the material prepared by polyphenylene sulfide and step (1), be uniformly mixed melt blending granulation in rear input twin screw extruder, obtain modified polyphenyl thioether master batch for subsequent use;
(3) nano-grade lithium iron phosphate, nano-silicon nitride and dropping in high-speed mixer together with modified polyphenyl thioether master batch and other remaining component after silane coupling agent mixing and stirring is uniformly mixed, again drop in twin screw extruder and extrude pelletizing, obtain described matrix material.
Advantage of the present invention is: the present invention is using nano kaoline after nano lanthanum oxide is high temperature modified as toughened and reinforced filler, and at its surperficial blending stearic acid, this modified filler and polyphenylene sulfide have good consistency, agglomeration between nanoparticle is effectively reduced, with polyphenylene sulfide mixed smelting process in disperse associativity better, effectively improve processing characteristics and the mechanical property of polyphenylene sulfide, modified master batch and nano-grade lithium iron phosphate, the absorption associativity of the contour heat conductive filler of nano-silicon nitride is also better, thus prepare mechanical property and all good matrix material of heat conductivility, it has wide application space in LED.
Embodiment
The composite plastic of this embodiment is made up of the raw material of following weight part: nano lanthanum oxide 0.1, polyphenylene sulfide 50, nano-grade lithium iron phosphate 1, nano-silicon nitride 8, silane coupling agent 0.4, nano kaoline 3, calcium zinc stabilizer 1, stearic acid 0.5, dehydrated alcohol 8, deionized water are appropriate.
The preparation method of this embodiment matrix material is:
(1) first by nano lanthanum oxide, nano kaoline, deionized water drops in high-energy mills, abundant ground and mixed 40min, by fully dry for mixture removing moisture after grinding terminates, subsequently gained composite granule is heated to 700 DEG C with the temperature rise rate of 15 DEG C under nitrogen atmosphere, insulation calcining 1h, room temperature is naturally cooled to after calcining terminates, obtain nano lanthanum oxide modified Nano kaolinite compound powder, last again by this powder and stearic acid, dehydrated alcohol mixes, heating in water bath to 70 DEG C, after high-speed mixing stirs 1.5h, complete drying removes ethanol, the grinding of gained crushing material is for subsequent use,
(2) drop in high-speed mixer together with the material prepared by polyphenylene sulfide and step (1), be uniformly mixed melt blending granulation in rear input twin screw extruder, obtain modified polyphenyl thioether master batch for subsequent use;
(3) nano-grade lithium iron phosphate, nano-silicon nitride and dropping in high-speed mixer together with modified polyphenyl thioether master batch and other remaining component after silane coupling agent mixing and stirring is uniformly mixed, again drop in twin screw extruder and extrude pelletizing, obtain described matrix material.
The performance test results of the composite heat conducting material obtained by the present embodiment is:
| Project | Index |
| Tensile strength (MPa) | 154 |
| Flexural strength (MPa) | 348 |
| Thermal conductivity (w/mk) | 9.6 |
| Flame retardant rating | UL94-V0 |
| Volume specific resistance (Ω .cm) | ＞10 13 |
Claims (2)
1. a LED nano lanthanum oxide modified kaolin strengthens polyphenylene sulfide ether heat sink material, it is characterized in that, this composite plastic is made up of the raw material of following weight part: nano lanthanum oxide 0.1-0.2, polyphenylene sulfide 50-60, nano-grade lithium iron phosphate 1-2, nano-silicon nitride 8-10, silane coupling agent 0.4-0.5, nano kaoline 3-4, calcium zinc stabilizer 1-2, stearic acid 0.5-0.6, dehydrated alcohol 8-10, deionized water are appropriate.
2. a kind of LED nano lanthanum oxide modified kaolin as claimed in claim 1 strengthens polyphenylene sulfide ether heat sink material and preparation method thereof, and it is characterized in that, described preparation method is:
(1) first by nano lanthanum oxide, nano kaoline, deionized water drops in high-energy mills, abundant ground and mixed 40-50min, by fully dry for mixture removing moisture after grinding terminates, subsequently gained composite granule is heated to 700-800 DEG C with the temperature rise rate of 15-20 DEG C under nitrogen atmosphere, insulation calcining 1-1.5h, room temperature is naturally cooled to after calcining terminates, obtain nano lanthanum oxide modified Nano kaolinite compound powder, last again by this powder and stearic acid, dehydrated alcohol mixes, heating in water bath is to 70-80 DEG C, after high-speed mixing stirs 1.5-2h, complete drying removes ethanol, the grinding of gained crushing material is for subsequent use,
(2) drop in high-speed mixer together with the material prepared by polyphenylene sulfide and step (1), be uniformly mixed melt blending granulation in rear input twin screw extruder, obtain modified polyphenyl thioether master batch for subsequent use;
(3) nano-grade lithium iron phosphate, nano-silicon nitride and dropping in high-speed mixer together with modified polyphenyl thioether master batch and other remaining component after silane coupling agent mixing and stirring is uniformly mixed, again drop in twin screw extruder and extrude pelletizing, obtain described matrix material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610009195.5A CN105542464A (en) | 2016-01-07 | 2016-01-07 | Nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material for LED and preparation method of heat dissipation material |
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| CN201610009195.5A CN105542464A (en) | 2016-01-07 | 2016-01-07 | Nanometer-lanthanum-oxide-modified kaolin-enhanced polyphenylene-sulfide-based heat dissipation material for LED and preparation method of heat dissipation material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177203A (en) * | 2017-05-19 | 2017-09-19 | 合肥市惠科精密模具有限公司 | A kind of AMOLED screens composite heat dissipation material |
| CN116855077A (en) * | 2023-06-16 | 2023-10-10 | 东莞市曼塔新材料科技有限公司 | High-wear-resistance polyphenylene sulfide modified material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239308A (en) * | 2008-03-18 | 2008-08-13 | 江苏工业学院 | Method for preparing attapulgite loading with nano cerium oxide |
| CN104364900A (en) * | 2012-04-17 | 2015-02-18 | 莫门蒂夫性能材料股份有限公司 | Thermally conductive polymer compostions to reduce molding cycle time |
-
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- 2016-01-07 CN CN201610009195.5A patent/CN105542464A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239308A (en) * | 2008-03-18 | 2008-08-13 | 江苏工业学院 | Method for preparing attapulgite loading with nano cerium oxide |
| CN104364900A (en) * | 2012-04-17 | 2015-02-18 | 莫门蒂夫性能材料股份有限公司 | Thermally conductive polymer compostions to reduce molding cycle time |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177203A (en) * | 2017-05-19 | 2017-09-19 | 合肥市惠科精密模具有限公司 | A kind of AMOLED screens composite heat dissipation material |
| CN116855077A (en) * | 2023-06-16 | 2023-10-10 | 东莞市曼塔新材料科技有限公司 | High-wear-resistance polyphenylene sulfide modified material and preparation method thereof |
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