CN104650530A - Carbon fiber reinforced polyformaldehyde composite material with high thermal conductivity and preparation method thereof - Google Patents
Carbon fiber reinforced polyformaldehyde composite material with high thermal conductivity and preparation method thereof Download PDFInfo
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- CN104650530A CN104650530A CN201510062851.3A CN201510062851A CN104650530A CN 104650530 A CN104650530 A CN 104650530A CN 201510062851 A CN201510062851 A CN 201510062851A CN 104650530 A CN104650530 A CN 104650530A
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Abstract
The invention discloses a carbon fiber reinforced polyformaldehyde composite material with high thermal conductivity and a preparation method thereof. The carbon fiber reinforced polyformaldehyde composite material is characterized by being prepared from the following raw materials in parts by weight: 90-100 parts of polyformaldehyde, 10-30 parts of carbon fibers, 1-2 parts of activated aluminum oxide, 0.4-0.6 part of glycerin trihydroxy stearate, 2-4 parts of melamine, 0.3-0.5 part of an antioxidant 1010, 5-8 parts of aluminum alloy powder, 0.3-0.6 part of a silane coupling agent KH-550, 2-4 parts of graphene oxide and 2-3 parts of nano silicon dioxide. According to the carbon fiber reinforced polyformaldehyde composite material disclosed by the invention, the added carbon fibers are uniformly dispersed into polyformaldehyde after being preheated so as to ensure that the comprehensive performance of materials can be improved; the added aluminum alloy powder can be used for increasing the thermal conductivity of polyformaldehyde, and can also be used for improving the mechanical performance; and the carbon fiber reinforced polyformaldehyde composite material is convenient to process and mold, is not easy to crack and deform, is low in cost, has significant heat-conducting performance and mechanical performance, and is worthy of being popularized.
Description
Technical field
the present invention relates to high fibre reinforced polyformaldehyde composite material of a kind of thermal conductivity and preparation method thereof, belong to technical field of plastic production.
Background technology
Polyoxymethylene is as one of engineering plastics, it is the linear polymer of a kind of high-density, high crystallization, there is higher strength and modulus, well wear-resistant, resistance to chemical attack, resistance to creep, fatigue performance, and the feature such as product size good stability, be replace the more satisfactory material of copper, zinc, aluminium and alloy product, be widely used in the fields such as automobile making, electric, mechanical, chemical industry.China's existing polyoxymethylene product is mostly universal, in order to improve the use of product at aerospace field, must shift to high-end modified polyacetal, the form of general employing matrix material carries out modification, this material modifiedly must have outstanding over-all properties, could for the preparation of mechanical component and the structure unit requiring to have the performance such as high-strength, Gao Mo, thermal stability are good, dimensional stabilizing, precision are high.
Existing much research adopts glass fiber reinforced acetal to prepare polyformaldehyde composite material more, and using carbon fiber as reinforcement, the rare report of research of the polyformaldehyde composite materials such as preparation high strength, high-modulus, height are heat-resisting.Carbon fiber, as a kind of new carbon, has that tensile strength is large, modulus is high, antifatigue, the performance that wear-resistant, corrosion-resistant, self lubricity, density are low, high temperature resistant, low temperature resistant, linear expansivity is little, conduction, heat conduction etc. are excellent.Carbon fiber, as reinforcement, can improve the mechanical property of material greatly, improves thermostability, frictional behaviour, raising rigidity, contributes to reducing molding shrinkage, ensureing dimensional precision.Polyoxymethylene after processing phase goods easily ftracture, the problem such as distortion, greatly affect job efficiency, waste resource, increases cost.
Summary of the invention
The object of this invention is to provide high fibre reinforced polyformaldehyde composite material of a kind of thermal conductivity and preparation method thereof.
In order to realize object of the present invention, the present invention is by following scheme implementation:
Fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity is high and preparation method thereof, is made up of the raw material of following weight part: polyoxymethylene 90-100, carbon fiber 10-30, activated alumina 1-2, glycerine three hydroxy stearic acid ester 0.4-0.6, trimeric cyanamide 2-4, antioxidant 1010 0.3-0.5, Al alloy powder 5-8, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3;
Fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity of the present invention is high and preparation method thereof, be made up of following concrete steps:
(1) mixing of polyoxymethylene, glycerine three hydroxy stearic acid ester and antioxidant 1010 is added in homogenizer and stirs, and in vacuum drying oven under 70-80 ° of C dry 2-3h for subsequent use;
(2) nano silicon is for subsequent use after vacuum sintering 2-3 hour under 400-450 ° of C, graphene oxide is added in the ethanolic soln containing 1% vinyl acetate, ultrasonic 5-10 minute under 90W, add Al alloy powder again and continue dispersion 20-30 minute, filter, precipitation use distilled water flushing post-drying, and and carbon fiber evenly, then carries out shortly cutting by silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use, after thermal pretreatment and above-mentioned mixture mixing and stirring for subsequent use;
(3) the polyoxymethylene batch mixing of step (1) and all the other surplus materialss are added to the main feeding trough of twin screw extruder, again the mixture of step (2) is added at natural venting port, setting processing parameter carries out extruding, tie rod, cooling, granulation, then the 70-80 ° of dry 2-3 hour of C in vacuum drying oven;
(4) the fibre reinforced polyformaldehyde composite material that step (3) obtains is heated to 150-180 ° of C, be added to again in injection moulding machine after rapid cooling, injection temperature is 180-190 ° of C, injection pressure is 50-60MPa, injection speed is 55-60mm/s, soaking time is 15-20s, and die temperature is 70-80 ° of C, can obtain the parts of different shape.
The processing parameter that the present invention extrudes is: extruder barrel temperature is 170-190 ° of C, and screw speed is 50-120r/min.
Advantage of the present invention is: be uniformly dispersed in polyoxymethylene after the carbon fiber thermal pretreatment that the present invention adds, improve the over-all properties of material, the Al alloy powder added adds the thermal conductivity of polyoxymethylene, and improve mechanical property, machine-shaping of the present invention is convenient, not easily craze and transfiguration, and cost is low, there is remarkable heat conductivility and mechanical property, be worthy to be popularized.
specific embodiments
Below by specific examples, the present invention is described in detail.
Fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity is high and preparation method thereof, is made up of the raw material of following weight part (kilogram): polyoxymethylene 98, carbon fiber 27, activated alumina 2, glycerine three hydroxy stearic acid ester 0.6, trimeric cyanamide 3, antioxidant 1010 0.5, Al alloy powder 7, silane resin acceptor kh-550 0.5, graphene oxide 4, nano silicon 3;
Fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity of the present invention is high and preparation method thereof, be made up of following concrete steps:
(1) mixing of polyoxymethylene, glycerine three hydroxy stearic acid ester and antioxidant 1010 is added in homogenizer and stirs, and in vacuum drying oven under 80 ° of C dry 3h for subsequent use;
(2) by for subsequent use after 3 hours for nano silicon vacuum sintering under 430 ° of C, graphene oxide is added in the ethanolic soln containing 1% vinyl acetate, under 90W ultrasonic 8 minutes, add Al alloy powder again and continue dispersion 30 minutes, filter, precipitation use distilled water flushing post-drying, and and carbon fiber evenly, then carries out shortly cutting by silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use, after thermal pretreatment and above-mentioned mixture mixing and stirring for subsequent use;
(3) the polyoxymethylene batch mixing of step (1) and all the other surplus materialss are added to the main feeding trough of twin screw extruder, again the mixture of step (2) is added at natural venting port, setting processing parameter carries out extruding, tie rod, cooling, granulation, then dry 3 hours of 80 ° of C in vacuum drying oven;
(4) the fibre reinforced polyformaldehyde composite material that step (3) obtains is heated to 170 ° of C, be added to again in injection moulding machine after rapid cooling, injection temperature is 180 ° of C, injection pressure is 60MPa, injection speed is 60mm/s, soaking time is 20s, and die temperature is 80 ° of C, can obtain the parts of different shape.
The processing parameter extruded of the present invention is: extruder barrel temperature is 190 ° of C, and screw speed is 80r/min.
In embodiment, the performance perameter of Carbon fibe enhancing acetal plastic is as follows:
Young's modulus (GPa): 16.6;
Tensile strength (MPa): 141;
Flexural strength (MPa): 167;
Elongation at break (%): 0.68;
Notched Izod impact strength (kJ/m-2): 13.4;
Thermal conductivity (W/mK): 1.25.
Claims (3)
1. fibre reinforced polyformaldehyde composite material that a thermal conductivity is high and preparation method thereof, it is characterized in that, be made up of the raw material of following weight part: polyoxymethylene 90-100, carbon fiber 10-30, activated alumina 1-2, glycerine three hydroxy stearic acid ester 0.4-0.6, trimeric cyanamide 2-4, antioxidant 1010 0.3-0.5, Al alloy powder 5-8, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3.
2. fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity is high according to claim 1 and preparation method thereof, is characterized in that, be made up of following concrete steps:
(1) mixing of polyoxymethylene, glycerine three hydroxy stearic acid ester and antioxidant 1010 is added in homogenizer and stirs, and in vacuum drying oven under 70-80 ° of C dry 2-3h for subsequent use;
(2) nano silicon is for subsequent use after vacuum sintering 2-3 hour under 400-450 ° of C, graphene oxide is added in the ethanolic soln containing 1% vinyl acetate, ultrasonic 5-10 minute under 90W, add Al alloy powder again and continue dispersion 20-30 minute, filter, precipitation use distilled water flushing post-drying, and and carbon fiber evenly, then carries out shortly cutting by silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use, after thermal pretreatment and above-mentioned mixture mixing and stirring for subsequent use;
(3) the polyoxymethylene batch mixing of step (1) and all the other surplus materialss are added to the main feeding trough of twin screw extruder, again the mixture of step (2) is added at natural venting port, setting processing parameter carries out extruding, tie rod, cooling, granulation, then the 70-80 ° of dry 2-3 hour of C in vacuum drying oven;
(4) the fibre reinforced polyformaldehyde composite material that step (3) obtains is heated to 150-180 ° of C, be added to again in injection moulding machine after rapid cooling, injection temperature is 180-190 ° of C, injection pressure is 50-60MPa, injection speed is 55-60mm/s, soaking time is 15-20s, and die temperature is 70-80 ° of C, can obtain the parts of different shape.
3. fibre reinforced polyformaldehyde composite material that a kind of thermal conductivity according to claim 2 is high and preparation method thereof, it is characterized in that, the processing parameter extruded is: extruder barrel temperature is 170-190 ° of C, and screw speed is 50-120r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510062851.3A CN104650530A (en) | 2015-02-06 | 2015-02-06 | Carbon fiber reinforced polyformaldehyde composite material with high thermal conductivity and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390842A (en) * | 2015-10-16 | 2016-03-09 | 宁波天鹭莱电子技术有限公司 | Electrical connector |
| CN109181208A (en) * | 2018-07-31 | 2019-01-11 | 长沙理工大学 | A kind of polyformaldehyde composite material and preparation method thereof |
-
2015
- 2015-02-06 CN CN201510062851.3A patent/CN104650530A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390842A (en) * | 2015-10-16 | 2016-03-09 | 宁波天鹭莱电子技术有限公司 | Electrical connector |
| CN109181208A (en) * | 2018-07-31 | 2019-01-11 | 长沙理工大学 | A kind of polyformaldehyde composite material and preparation method thereof |
| CN109181208B (en) * | 2018-07-31 | 2020-11-13 | 长沙理工大学 | Polyformaldehyde composite material and preparation method thereof |
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Application publication date: 20150527 |
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