CN107629420A - A kind of preparation method of PBT carbon fibers heat-conductive composite material - Google Patents
A kind of preparation method of PBT carbon fibers heat-conductive composite material Download PDFInfo
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- CN107629420A CN107629420A CN201710799869.0A CN201710799869A CN107629420A CN 107629420 A CN107629420 A CN 107629420A CN 201710799869 A CN201710799869 A CN 201710799869A CN 107629420 A CN107629420 A CN 107629420A
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Abstract
The present invention provides a kind of preparation method of PBT carbon fibers heat-conductive composite material, the present invention is coated on carbon fiber surface with nano aluminum nitride, the lubricity of nano aluminum nitride is good, thermal diffusivity is good, improve the thermal diffusivity and dispersing uniformity of carbon fiber, and PBT combination is evenly, the anisotropy of carbon fiber is reduced simultaneously, improves the uniformity of radiating.Modified carbon fiber is modified with silane coupler kh 550, improves carbon fiber and PBT compatibility, improves the mechanical property of composite, improves intensity, toughness.
Description
Technical field
The present invention relates to PBT plastic field, more particularly to a kind of preparation method of PBT carbon fibers heat-conductive composite material.
Background technology
Polybutylene terephthalate (PBT) is one of five large-engineering plastics, because its excellent intensity and hardness, low temperature are high
Toughness, high resistance to stress cracking, high oil resistant solvent resistant, low thermal coefficient of expansion and good processability [1], are widely used in luminous two
The fields such as pole pipe, Electronic Packaging, electricity-saving lamp, heat exchanger, thermal barrier coating.But the thermal conductivities of PBT in itself limit it than relatively low
Application to it, it is necessary to carry out heat conduction modification.
It is modified and flame-retardant modified that modification to PBT at present focuses primarily upon enhancing, such as PBT/ acrylonitrile-butadienes-benzene second
Alkene plastics (ABS) system, PBT/ makrolon (PC) system etc., PBT halogen system, nitrogen system, phosphorus series elements or inorganic combustion inhibitor
It is flame-retardant modified etc.；But PBT heat conduction study on the modification report is less.Li Guolin etc. is added in PBT/ polyamide (PA) system
MgO, while anti-flammability is improved, improve the thermal conductivity of system.But when content of MgO is higher, thermal conductivity is less than
0.8W/ (m.K), the improvement to thermal conductivity are less obvious.
Carbon fiber (CF) be it is a kind of it is light, intensity is high, fiber that is heat-resisting, having higher heat-conductivity and electrical conductivity, by CF plus
Enter in polymer, while mechanical properties of polymer can be improved within the specific limits, additionally it is possible to improve polymer heat conduction and
Electric conductivity, it is a kind of preferable heat filling.But CF has certain directionality, after CF is added in PBT, PBT/
The thermal conductivity of CF composites may have certain directionality, and the thermal conductivity of different directions may be different, therefore《PBT/CF
The preparation and research of heat-conductive composite material》The author determines the thermal conductivity in direction in the interlayer direction and layer of PBT/CF composites
Rate.Meanwhile the thermal conductivity of PBT/CF composites is simulated using Lewis-Nielsen models, it is expected both predict
The thermal conductivity of PBT/CF composites during different CF contents, the parameter of sign CF directionality in the model, checking can be passed through again
CF has directionality in PBT matrixes.
Carbon fiber has the anisotropy of heat conduction, easily causes the uneven of radiating, it is necessary to improve.
The content of the invention
The defects of the object of the invention is exactly to make up prior art, there is provided a kind of PBT carbon fibers heat-conductive composite material
Preparation method.
The present invention is achieved by the following technical solutions：
A kind of preparation method of PBT carbon fibers heat-conductive composite material, step are：
（1）Carbon fiber is thoroughly dried, is redispersed in DMF, ultrasonic disperse is uniform, adds polyethylene glycol, disperses equal
It is even, nano aluminum nitride is added, is uniformly dispersed, is reacted at 75-80 DEG C 22-24 hours, filtering, is dried, grinding, is modified
Carbon fiber；
（2）Ethanol is heated to 70-75 DEG C, silane coupler kh-550 is added, stirs, adds modified carbon fiber, insulation
And 10-11min is stirred, 2-2.5h is stood, sucks supernatant liquor with suction pipe, remaining sediment is put into drying box, at 80-82 DEG C
2-2.5h is dried, obtains mixed material；
（3）PBT is fully dried, added with mixed material, antioxidant in Haake banbury, temperature is 230-235 DEG C, and rotating speed is
30-35r/min, 10-12 minutes are mixed, add in double screw extruder and be granulated, produce PBT carbon fiber heat-conductive composite materials.
Step（1）Middle polyethylene glycol：DMF：Carbon fiber：The mass ratio of nano aluminum nitride is 2-2.3:30-34:8-9:3-
3.5。
Step（1）The drying is freeze-drying.
Step（2）Middle ethanol：Silane coupler kh-550：The mass ratio of modified carbon fiber is 30-35:1-1.5:13-15.
By step（3）PBT：Mixed material：Antioxidant 40-42:53-56:2.5-3.
It is an advantage of the invention that：The present invention is coated on carbon fiber surface, the lubricity of nano aluminum nitride with nano aluminum nitride
It is good, thermal diffusivity is good, improve the thermal diffusivity and dispersing uniformity of carbon fiber, and PBT combination evenly, while reduce carbon fibre
The anisotropy of dimension, improve the uniformity of radiating.Modified carbon fiber is modified with silane coupler kh-550, improved
The compatibility of carbon fiber and PBT, the mechanical property of composite is improved, improve intensity, toughness.
Embodiment
A kind of preparation method of PBT carbon fibers heat-conductive composite material, step are：
（1）Carbon fiber is thoroughly dried, is redispersed in DMF, ultrasonic disperse is uniform, adds polyethylene glycol, disperses equal
It is even, nano aluminum nitride is added, is uniformly dispersed, is reacted 23 hours at 75 DEG C, filtering, is dried, grinding, obtains carbon modified fibre
Dimension；
（2）Ethanol is heated to 70 DEG C, silane coupler kh-550 is added, stirs, modified carbon fiber is added, is incubated and stirs
10min is mixed, 2h is stood, supernatant liquor is sucked with suction pipe, remaining sediment is put into drying box, and 2h is dried at 80 DEG C, is mixed
Compound material；
（3）PBT is fully dried, added with mixed material, antioxidant in Haake banbury, temperature is 230 DEG C, rotating speed 30r/
Min, mix 10 minutes, add in double screw extruder and be granulated, produce PBT carbon fiber heat-conductive composite materials.
Step（1）Middle polyethylene glycol：DMF：Carbon fiber：The mass ratio of nano aluminum nitride is 2:30:8:3.
Step（1）The drying is freeze-drying.
Step（2）Middle ethanol：Silane coupler kh-550：The mass ratio of modified carbon fiber is 30:1:13.
By step（3）PBT：Mixed material：Antioxidant 40:53:2.5.
Claims (5)
1. a kind of preparation method of PBT carbon fibers heat-conductive composite material, it is characterised in that step is：
（1）Carbon fiber is thoroughly dried, is redispersed in DMF, ultrasonic disperse is uniform, adds polyethylene glycol, disperses equal
It is even, nano aluminum nitride is added, is uniformly dispersed, is reacted at 75-80 DEG C 22-24 hours, filtering, is dried, grinding, is modified
Carbon fiber；
（2）Ethanol is heated to 70-75 DEG C, silane coupler kh-550 is added, stirs, adds modified carbon fiber, insulation
And 10-11min is stirred, 2-2.5h is stood, sucks supernatant liquor with suction pipe, remaining sediment is put into drying box, at 80-82 DEG C
2-2.5h is dried, obtains mixed material；
（3）PBT is fully dried, added with mixed material, antioxidant in Haake banbury, temperature is 230-235 DEG C, and rotating speed is
30-35r/min, 10-12 minutes are mixed, add in double screw extruder and be granulated, produce PBT carbon fiber heat-conductive composite materials.
2. the preparation method of PBT carbon fibers heat-conductive composite material as claimed in claim 1, it is characterised in that step（1）In poly- second
Glycol：DMF：Carbon fiber：The mass ratio of nano aluminum nitride is 2-2.3:30-34:8-9:3-3.5.
3. the preparation method of PBT carbon fibers heat-conductive composite material as claimed in claim 1, it is characterised in that step（1）It is described dry
Dry is freeze-drying.
4. the preparation method of PBT carbon fibers heat-conductive composite material as claimed in claim 1, it is characterised in that step（2）Middle second
Alcohol：Silane coupler kh-550：The mass ratio of modified carbon fiber is 30-35:1-1.5:13-15.
5. the preparation method of PBT carbon fibers heat-conductive composite material as claimed in claim 1, it is characterised in that by step（3）PBT：
Mixed material：Antioxidant 40-42:53-56:2.5-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710799869.0A CN107629420A (en) | 2017-09-07 | 2017-09-07 | A kind of preparation method of PBT carbon fibers heat-conductive composite material |
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| CN201710799869.0A CN107629420A (en) | 2017-09-07 | 2017-09-07 | A kind of preparation method of PBT carbon fibers heat-conductive composite material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314778A (en) * | 2018-02-28 | 2018-07-24 | 南方科技大学 | A kind of modified epoxy resin composite and preparation method thereof |
| CN108641402A (en) * | 2018-06-08 | 2018-10-12 | 徐州乐泰机电科技有限公司 | A kind of preparation method of novel heat-conducting insulating materials |
| CN110437591A (en) * | 2019-08-16 | 2019-11-12 | 南通星辰合成材料有限公司 | A kind of optical cable high viscosity PBT material and preparation method thereof |
| CN116120638A (en) * | 2023-03-06 | 2023-05-16 | 杭州蓝碳新材料有限公司 | Preparation method of carbon ceramic nanomaterial and high-thermal-conductivity nano carbon Tao Rongjiao thereof |
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| 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 |
| CN104559145A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-toughness and high-thermal-conductivity polymer 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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- 2017-09-07 CN CN201710799869.0A patent/CN107629420A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104559145A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-toughness and high-thermal-conductivity polymer 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314778A (en) * | 2018-02-28 | 2018-07-24 | 南方科技大学 | A kind of modified epoxy resin composite and preparation method thereof |
| CN108314778B (en) * | 2018-02-28 | 2021-01-05 | 南方科技大学 | Modified epoxy resin composite material and preparation method thereof |
| CN108641402A (en) * | 2018-06-08 | 2018-10-12 | 徐州乐泰机电科技有限公司 | A kind of preparation method of novel heat-conducting insulating materials |
| CN110437591A (en) * | 2019-08-16 | 2019-11-12 | 南通星辰合成材料有限公司 | A kind of optical cable high viscosity PBT material and preparation method thereof |
| CN116120638A (en) * | 2023-03-06 | 2023-05-16 | 杭州蓝碳新材料有限公司 | Preparation method of carbon ceramic nanomaterial and high-thermal-conductivity nano carbon Tao Rongjiao thereof |
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Application publication date: 20180126 |