CN104650533A - Scratch-resistant carbon fiber reinforced polyacetal composite material and preparation method thereof - Google Patents
Scratch-resistant carbon fiber reinforced polyacetal composite material and preparation method thereof Download PDFInfo
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Abstract
The invention disclose a scratch-resistant carbon fiber reinforced polyacetal composite material and a preparation method thereof. The scratch-resistant carbon fiber reinforced polyacetal composite material is characterized by being prepared from the following raw materials in parts by weight: 90-100 parts of polyacetal, 10-30 parts of carbon fibers, 0.5-0.7 part of calcium stearate, 0.1-0.3 part of antioxidant CA, 0.2-0.4 part of pentaerythritol ester, 4-6 parts of wollastone, 0.3-0.6 part of silane coupling agent KH-550, 2-4 parts of oxidized graphene, and 2-3 parts of nanosilica. The added carbon fibers are evenly dispersed in polyacetal after being preheated, so that the integrated performance of the material can be improved, the lubricating property of polyacetal during the process can be increased through the added calcium stearate, and the material loss can be decreased; and through the synergistic action of the added wollastone and carbon fibers, the scratch-resistant performance of polyacetal can be improved, and the decoration effect can be enhanced.
Description
Technical field
fibre reinforced polyformaldehyde composite material that the present invention relates to a kind of scratch resistant and preparation method thereof, belongs 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.If acetal plastic can be caused decorative effect to reduce when the material as decoration during sharp-pointed material scratch, and meeting cost of idleness when replacing, the present invention adds according to this situation the mobility that calcium stearate increases plastics in preparation process, reduce the injury of machinery to frosting, and add the scoring resistance that wollastonite increases plastics, in process prepared by technique, add the problem that thermal treatment process reduces goods distortion easy to crack in post production process, save resource.
Summary of the invention
Fibre reinforced polyformaldehyde composite material that the object of this invention is to provide a kind of scratch resistant 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 of a kind of scratch resistant and preparation method thereof, is made up of the raw material of following weight part: polyoxymethylene 90-100, carbon fiber 10-30, stearate calcium 0.5-0.7, antioxidant CA 0.1-0.3, pentaerythritol ester 0.2-0.4, wollastonite 4-6, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3;
Fibre reinforced polyformaldehyde composite material of a kind of scratch resistant of the present invention and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, stearate calcium and antioxidant CA mixing 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 dehydrated alcohol, ultrasonic 5-10 minute under 90W, add wollastonite 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 stearate calcium added adds the oilness of polyoxymethylene in the course of processing, reduce material unaccounted-for (MUF), the wollastonite added and carbon fiber synergy, improve the scratch resistant performance of polyoxymethylene, enhance decorative effect.
specific embodiments
Below by specific examples, the present invention is described in detail.
Fibre reinforced polyformaldehyde composite material of a kind of scratch resistant and preparation method thereof, is made up of the raw material of following weight part (kilogram): polyoxymethylene 100, carbon fiber 26, stearate calcium 0.7, antioxidant CA 0.3, pentaerythritol ester 0.4, wollastonite 6, silane resin acceptor kh-550 0.5, graphene oxide 4, nano silicon 3;
Fibre reinforced polyformaldehyde composite material of a kind of scratch resistant of the present invention and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, stearate calcium and antioxidant CA mixing is added in homogenizer and stirs, and in vacuum drying oven under 70 ° 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 dehydrated alcohol, under 90W ultrasonic 8 minutes, add wollastonite 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): 19.2;
Tensile strength (MPa): 158;
Flexural strength (MPa): 169;
Elongation at break (%): 0.78;
Notched Izod impact strength (kJ/m-2): 15.1;
Abrasion loss (mg): 11.3.
Claims (3)
1. the fibre reinforced polyformaldehyde composite material and preparation method thereof of a scratch resistant, it is characterized in that, be made up of the raw material of following weight part: polyoxymethylene 90-100, carbon fiber 10-30, stearate calcium 0.5-0.7, antioxidant CA 0.1-0.3, pentaerythritol ester 0.2-0.4, wollastonite 4-6, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3.
2. the fibre reinforced polyformaldehyde composite material and preparation method thereof of a kind of scratch resistant according to claim 1, is characterized in that, be made up of following concrete steps:
(1) polyoxymethylene, stearate calcium and antioxidant CA mixing 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 dehydrated alcohol, ultrasonic 5-10 minute under 90W, add wollastonite 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. the fibre reinforced polyformaldehyde composite material and preparation method thereof of a kind of scratch resistant according to claim 2, 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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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435964A (en) * | 2013-08-14 | 2013-12-11 | 吴江市英力达塑料包装有限公司 | Wear-resistant reinforced POM and preparation method thereof |
| CN103613902A (en) * | 2013-11-25 | 2014-03-05 | 大连路阳科技开发有限公司 | Heat-conducting friction-resistant polyformaldehyde composite material and preparation method thereof |
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- 2015-02-06 CN CN201510062949.9A patent/CN104650533A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435964A (en) * | 2013-08-14 | 2013-12-11 | 吴江市英力达塑料包装有限公司 | Wear-resistant reinforced POM and preparation method thereof |
| CN103613902A (en) * | 2013-11-25 | 2014-03-05 | 大连路阳科技开发有限公司 | Heat-conducting friction-resistant polyformaldehyde composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 马小丰等: "碳纤维增强聚甲醛复合材料的制备及性能研究", 《工程塑料应用》, vol. 42, no. 1, 31 January 2014 (2014-01-31), pages 23 - 26 * |
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Application publication date: 20150527 |