CN104672763A - Carbon fiber reinforced polyformaldehyde composite material with high fatigue strength and preparation method of composite material - Google Patents
Carbon fiber reinforced polyformaldehyde composite material with high fatigue strength and preparation method of composite material Download PDFInfo
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- CN104672763A CN104672763A CN201510062832.0A CN201510062832A CN104672763A CN 104672763 A CN104672763 A CN 104672763A CN 201510062832 A CN201510062832 A CN 201510062832A CN 104672763 A CN104672763 A CN 104672763A
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Abstract
The invention discloses a carbon fiber reinforced polyformaldehyde composite material with high fatigue strength and preparation method of the composite material. The composite material is characterized by comprising the following raw materials in part by weight: 5-7 parts of talcum powder, 90-100 parts of polyformaldehyde, 10-30 parts of carbon fiber, 0.3-0.5 part of ethylene bis stearamide, 0.2-0.4 part of an antioxidant 1076, 0-3-0.6 part of a silane coupling agent KH-570, 2-4 parts of graphene oxide, and 2-3 parts of nano silica. According to the invention, the added carbon fiber is uniformly dispersed in polyformaldehyde after preheating treatment to improve the comprehensive performance of the material; the compatibility with the polyformaldehyde plastic is increased on the added talcum powder through the coupling treatment, and the fatigue resistance of polyformaldehyde is improved through the synergistic effect of the talcum powder and the carbon fiber. The composite material disclosed by the invention has the features of low construction cost, environment friendliness, simple process operation and saved use cost.
Description
Technical field
the present invention relates to high fibre reinforced polyformaldehyde composite material of a kind of fatigue strength 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.Major part engineering plastics can crack or rupture under long-time use, fatigue strength is low, work-ing life is not long, harm can be brought in the course of the work, and polyoxymethylene after processing phase goods easily ftracture, the problem such as distortion, greatly affect job efficiency, waste resource, increase cost, the present invention adds talcum powder, and by coupling agent treatment, add the consistency with acetal plastic, and technological operation is simple, solve the problem easily occurring craze and transfiguration in end processing sequences, save cost.
Summary of the invention
The object of this invention is to provide high fibre reinforced polyformaldehyde composite material of a kind of fatigue strength 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 fatigue strength is high and preparation method thereof, is made up of the raw material of following weight part: talcum powder 5-7, polyoxymethylene 90-100, carbon fiber 10-30, ethylene bis stearamide 0.3-0.5, antioxidant 1076 0.2-0.4, Silane coupling reagent KH-570 0.3-0.6, graphene oxide 2-4, nano silicon 2-3;
Fibre reinforced polyformaldehyde composite material that a kind of fatigue strength of the present invention is high and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, ethylene bis stearamide and antioxidant 1076 mixing be added in homogenizer stir, 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 dehydrated alcohol, ultrasonic 5-10 minute under 90W, add talcum 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 coupling reagent KH-570, 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 extruded of the present invention 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 talcum powder added adds the consistency with acetal plastic through coupling processing, the feature of improve the fatigue resistance of polyoxymethylene with carbon fiber synergy, the present invention has that cost is low, environmental protection, technological operation are simple, saving use cost.
specific embodiments
Below by specific examples, the present invention is described in detail.
Fibre reinforced polyformaldehyde composite material that a kind of fatigue strength is high and preparation method thereof, is made up of the raw material of following weight part (kilogram): talcum powder 7, polyoxymethylene 100, carbon fiber 24, ethylene bis stearamide 0.5, antioxidant 1076 0.4, Silane coupling reagent KH-570 0.6, graphene oxide 4, nano silicon 3;
Fibre reinforced polyformaldehyde composite material that a kind of fatigue strength of the present invention is high and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, ethylene bis stearamide and antioxidant 1076 mixing be added in homogenizer stir, 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 420 ° of C, graphene oxide is added in dehydrated alcohol, under 90W ultrasonic 8 minutes, add talcum 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 coupling reagent KH-570, 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 18s, 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 70r/min.
In embodiment, the performance perameter of Carbon fibe enhancing acetal plastic is as follows:
Young's modulus (GPa): 21.2;
Tensile strength (MPa): 163;
Flexural strength (MPa): 189;
Elongation at break (%): 0.57;
Notched Izod impact strength (kJ/m-2): 15.8.
Claims (3)
1. fibre reinforced polyformaldehyde composite material that a fatigue strength is high and preparation method thereof, it is characterized in that, be made up of the raw material of following weight part: talcum powder 5-7, polyoxymethylene 90-100, carbon fiber 10-30, ethylene bis stearamide 0.3-0.5, antioxidant 1076 0.2-0.4, Silane coupling reagent KH-570 0.3-0.6, graphene oxide 2-4, nano silicon 2-3.
2. fibre reinforced polyformaldehyde composite material that a kind of fatigue strength is high according to claim 1 and preparation method thereof, is characterized in that, be made up of following concrete steps:
(1) polyoxymethylene, ethylene bis stearamide and antioxidant 1076 mixing be added in homogenizer stir, 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 dehydrated alcohol, ultrasonic 5-10 minute under 90W, add talcum 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 coupling reagent KH-570, 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 fatigue strength 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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| CN201510062832.0A CN104672763A (en) | 2015-02-06 | 2015-02-06 | Carbon fiber reinforced polyformaldehyde composite material with high fatigue strength and preparation method of composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105153632A (en) * | 2015-07-31 | 2015-12-16 | 苏州天健竹业科技有限公司 | Creep-resistant composite material for indoor body-building equipment and preparation method thereof |
| CN106751584A (en) * | 2016-12-27 | 2017-05-31 | 铜陵市铜峰光电科技有限公司 | A kind of LED fills fire-retardant plastic of high heat conduction and preparation method thereof with oxidative grafting modified carbon fiber Graphene |
| CN106751423A (en) * | 2017-01-14 | 2017-05-31 | 董地 | It is a kind of to be applied to composite of robot building and preparation method thereof |
-
2015
- 2015-02-06 CN CN201510062832.0A patent/CN104672763A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105153632A (en) * | 2015-07-31 | 2015-12-16 | 苏州天健竹业科技有限公司 | Creep-resistant composite material for indoor body-building equipment and preparation method thereof |
| CN106751584A (en) * | 2016-12-27 | 2017-05-31 | 铜陵市铜峰光电科技有限公司 | A kind of LED fills fire-retardant plastic of high heat conduction and preparation method thereof with oxidative grafting modified carbon fiber Graphene |
| CN106751423A (en) * | 2017-01-14 | 2017-05-31 | 董地 | It is a kind of to be applied to composite of robot building and preparation method thereof |
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Application publication date: 20150603 |