CN105255183A - Magnesium oxide whisker-nanometer boron nitride filling-modified PPS/PBT composite thermal conductive plastic for LEDs and preparation method thereof - Google Patents
Magnesium oxide whisker-nanometer boron nitride filling-modified PPS/PBT composite thermal conductive plastic for LEDs and preparation method thereof Download PDFInfo
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- CN105255183A CN105255183A CN201510589394.3A CN201510589394A CN105255183A CN 105255183 A CN105255183 A CN 105255183A CN 201510589394 A CN201510589394 A CN 201510589394A CN 105255183 A CN105255183 A CN 105255183A
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Abstract
The invention discloses a magnesium oxide whisker-nanometer boron nitride filling-modified PPS/PBT composite thermal conductive plastic for LEDs and a preparation method thereof. The thermal conductive plastic employs a mixture of PPS and PBT plastics and has good mechanical properties and resistance to heat, corrosion and the like; and filling materials in a fibrous material prepared from PBT and PPS composite materials having undergone thermal conduction modification by magnesium oxide whisker and nanometer boron nitride are uniformly dispersed, and the two composite short fibers are more uniformly dispersed and bonded in later mixing and can form a uniform and stable heat transfer network, so the phenomenon of nonuniform heat transfer of plastics in traditional production methods can be improved and the utilization rate of the thermal conductive filling materials can be enhanced. Test results show that the composite thermal conductive plastic has excellent thermal conductivity, fire resistance, safety and resistance to light radiation ageing, can maintain good usage performance after long-time usage and can be widely used in the field of heat dissipation of the LEDs.
Description
Technical field
The present invention relates to heat-conducting plastic preparing technical field, particularly relate to filling-modified PPS/PBT composite heat-conducting plastics of a kind of LED magnesia crystal whisker-nm-class boron nitride and preparation method thereof.
Background technology
LED is as the novel light source of a generation, and the working temperature of its light extraction efficiency and life-span and chip has direct relation, and heat dissipation problem is always the focus paid close attention to.No matter LED chip encapsulates or Design of Luminaires application, often need to discharge by thermally conductive material the heat that LED produces, cost for dispelling the heat also occupies the proportion of system cost about 20% ~ 30%, and the Cooling Solution seeking high performance-price ratio also becomes the target of dealer's pursuit always.
At present in LED illumination light source and light fixture are produced, main employing metal aluminium or stupalith are as heat conduction and heat radiation system, but, 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, 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.
Organic heat-conducting plastic starts to be paid close attention in the industry in recent years gradually, first plastics itself have the advantages such as good insulation, lightweight, inexpensive, various shapes, production for LED illumination product provides a kind of new thinking and solution, the difficult point of heat-conducting plastic is to improve its thermal conductivity, traditional production method mainly by the plastic directly the blended banburying of blending height heat conductive filler extrude and obtain, this method produces the problem that the heat conduction of heat-conducting plastic ubiquity is uneven, filler utilization ratio is low obtained, and its comprehensive heat conduction and heat radiation effect is still to be modified.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, PPS/PBT composite heat-conducting plastics providing a kind of LED magnesia crystal whisker-nm-class boron nitride filling-modified and preparation method thereof.
The present invention is achieved by the following technical solutions:
The PPS/PBT composite heat-conducting plastics that a kind of LED magnesia crystal whisker-nm-class boron nitride is filling-modified, it is characterized in that, this composite plastic is made up of the raw material of following weight part: PPS master batch 60-70, PBT master batch 20-25, triphenyl phosphite 0.2-0.3, antioxidant 1010 0.1-0.2, silane coupling agent 1-2, polyether-ether-ketone 2-3, magnesia crystal whisker 12-16, nm-class boron nitride 22-25, calcium zinc stabilizer 1-1.5.
The preparation method of the PPS/PBT composite heat-conducting plastics that described a kind of LED magnesia crystal whisker-nm-class boron nitride is filling-modified is:
(1) PBT-magnesia crystal whisker conjugated fibre is prepared: be first uniformly mixed by the silane coupling agent of magnesia crystal whisker and 0.2-0.3 weight part, subsequently itself and PBT master batch are uniformly mixed, through melt-spinning technology, gained compound makes that length is 20-30mm, diameter is that the composite short fiber of 50-80 μm is for subsequent use;
(2) PPS-nm-class boron nitride conjugated fibre is prepared: first mixed by the silane coupling agent of nm-class boron nitride with residuals weight part, subsequently itself and polyether-ether-ketone, PPS master batch mix and blend are uniformly dispersed, through melt-spinning technology, gained material makes that length is 10-20mm, diameter is that the composite short fiber of 60-80 μm is for subsequent use;
(3) mix in rear input twin screw extruder by step (1) and (2) gained composite short fiber and other leftover materials, extruding pelletization under 240-250 DEG C of condition, obtains described composite heat-conducting plastics.
Beneficial effect: the present invention by PPS plastics and PBT plastic used in combination, combine both advantages, there is good mechanical property and heat-resistant anticorrosive loses effect, the PBT after heat conduction modification is carried out through magnesia crystal whisker and nm-class boron nitride, in filamentary material prepared by PPS matrix material, fillers dispersed is even, and these two kinds of composite short fibers disperse the more even of combination in later stage mixing process, uniform and stable heat trnasfer network can be formed, significantly can improve the phenomenon of the plastics heat conduction inequality that conventional production methods is brought, improve heat conductive filler utilization ratio, test result shows that this composite heat-conducting plastics have excellent thermal conductivity, flame-retarding, fast light radiation aging, long-time use still can keep good use properties, LED field of radiating can be widely used in.
Embodiment
Embodiment
The composite plastic of this embodiment is prepared by the raw material of following weight part: PPS master batch 65, PBT master batch 25, triphenyl phosphite 0.2, antioxidant 1010 0.1, silane coupling agent 1.5, polyether-ether-ketone 2.5, magnesia crystal whisker 15, nm-class boron nitride 24, calcium zinc stabilizer 1.2.
The preparation method of the PPS/PBT composite heat-conducting plastics that described a kind of LED magnesia crystal whisker-nm-class boron nitride is filling-modified is:
(1) PBT-magnesia crystal whisker conjugated fibre is prepared: be first uniformly mixed by the silane coupling agent of magnesia crystal whisker and 0.2 weight part, subsequently itself and PBT master batch are uniformly mixed, through melt-spinning technology, gained compound makes that length is 30mm, diameter is that the composite short fiber of 60 μm is for subsequent use;
(2) PPS-nm-class boron nitride conjugated fibre is prepared: first mixed by the silane coupling agent of nm-class boron nitride with residuals weight part, subsequently itself and polyether-ether-ketone, PPS master batch mix and blend are uniformly dispersed, through melt-spinning technology, gained material makes that length is 15mm, diameter is that the composite short fiber of 70 μm is for subsequent use;
(3) mix in rear input twin screw extruder by step (1) and (2) gained composite short fiber and other leftover materials, extruding pelletization under 250 DEG C of conditions, obtains described composite heat-conducting plastics.
The performance test results of the composite heat-conducting plastics obtained by the present embodiment is:
Project | Index |
Resistance to impact shock (KJ/m 2) | 31.5 |
Flexural strength (MPa) | 840 |
Thermal conductivity (w/mk) | 17.4 |
Flame retardant rating | UL94-V0 |
Volume specific resistance (10 21Ω.cm) | 3.6 |
Claims (2)
1. the PPS/PBT composite heat-conducting plastics that LED magnesia crystal whisker-nm-class boron nitride is filling-modified, it is characterized in that, this composite plastic is made up of the raw material of following weight part: PPS master batch 60-70, PBT master batch 20-25, triphenyl phosphite 0.2-0.3, antioxidant 1010 0.1-0.2, silane coupling agent 1-2, polyether-ether-ketone 2-3, magnesia crystal whisker 12-16, nm-class boron nitride 22-25, calcium zinc stabilizer 1-1.5.
2. PPS/PBT composite heat-conducting plastics that a kind of LED magnesia crystal whisker-nm-class boron nitride as claimed in claim 1 is filling-modified and preparation method thereof, its spy is, described preparation method is:
(1) PBT-magnesia crystal whisker conjugated fibre is prepared: be first uniformly mixed by the silane coupling agent of magnesia crystal whisker and 0.2-0.3 weight part, subsequently itself and PBT master batch are uniformly mixed, through melt-spinning technology, gained compound makes that length is 20-30mm, diameter is that the composite short fiber of 50-80 μm is for subsequent use;
(2) PPS-nm-class boron nitride conjugated fibre is prepared: first mixed by the silane coupling agent of nm-class boron nitride with residuals weight part, subsequently itself and polyether-ether-ketone, PPS master batch mix and blend are uniformly dispersed, through melt-spinning technology, gained material makes that length is 10-20mm, diameter is that the composite short fiber of 60-80 μm is for subsequent use;
(3) mix in rear input twin screw extruder by step (1) and (2) gained composite short fiber and other leftover materials, extruding pelletization under 240-250 DEG C of condition, obtains described composite heat-conducting plastics.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110129994A (en) * | 2019-05-24 | 2019-08-16 | 东华大学 | Micro nanometer fiber film and preparation method thereof with efficient absorbent cooling function |
CN112094499A (en) * | 2020-06-01 | 2020-12-18 | 西北工业大学 | PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof |
CN115547691A (en) * | 2022-11-04 | 2022-12-30 | 深圳市米韵科技有限公司 | Heat-conducting diaphragm for high-frequency capacitor and preparation method thereof |
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CN102532897A (en) * | 2010-12-27 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Electric-insulating heat-conducting polyphenyl thioether composite material and preparation method thereof |
CN104559149A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | Carbon composite high-thermal-conductivity plastic material and preparation method thereof |
CN104559148A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-thermal-diffusion-coefficient high molecular material and preparation method thereof |
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Patent Citations (3)
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CN102532897A (en) * | 2010-12-27 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Electric-insulating heat-conducting polyphenyl thioether composite material and preparation method thereof |
CN104559149A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | Carbon composite high-thermal-conductivity plastic material and preparation method thereof |
CN104559148A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-thermal-diffusion-coefficient high molecular material and preparation method thereof |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110129994A (en) * | 2019-05-24 | 2019-08-16 | 东华大学 | Micro nanometer fiber film and preparation method thereof with efficient absorbent cooling function |
CN112094499A (en) * | 2020-06-01 | 2020-12-18 | 西北工业大学 | PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof |
CN112094499B (en) * | 2020-06-01 | 2022-04-05 | 西北工业大学 | PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof |
CN115547691A (en) * | 2022-11-04 | 2022-12-30 | 深圳市米韵科技有限公司 | Heat-conducting diaphragm for high-frequency capacitor and preparation method thereof |
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