CN104672771A - Carbon fiber reinforced polyformaldehyde composite material capable of reducing friction coefficient and preparation method thereof - Google Patents
Carbon fiber reinforced polyformaldehyde composite material capable of reducing friction coefficient and preparation method thereof Download PDFInfo
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- CN104672771A CN104672771A CN201510062938.0A CN201510062938A CN104672771A CN 104672771 A CN104672771 A CN 104672771A CN 201510062938 A CN201510062938 A CN 201510062938A CN 104672771 A CN104672771 A CN 104672771A
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Abstract
The invention discloses a carbon fiber reinforced polyformaldehyde composite material capable of reducing friction coefficient 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, 3-5 parts of polytetrafluoroethylene micropowder, 2-5 parts of polyethylene micropowder, 2-4 parts of melamine, 0.5-1 part of magnesium naphthenate, 0.3-0.5 part of antioxidants MB, 0.3-0.6 part of silane coupling agent KH-550, 2-4 parts of graphene oxide and 2-3 parts of nanometer silicon dioxide. According to the carbon fiber reinforced polyformaldehyde composite material, the added carbon fibers are uniformly dispersed in polyformaldehyde after being pretreated, so that the comprehensive property of the material is enhanced; the added polytetrafluoroethylene and polyethylene improve the self friction coefficient of polyformaldehyde and reduce the frictional resistance, so that the carbon fiber reinforced polyformaldehyde composite material can be widely applied to a bearing anti-friction part.
Description
Technical field
the present invention relates to a kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient 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.As bearing anti-attrition part, when working temperature is for a long time more than 160 ° of C or when having very large radial load, thrust load, or need continuous high speed to operate, and require in long term time that the deflection of axle is minimum or require the wearing and tearing of axle prior to bearing wearing and tearing time, general plastics cannot meet its requirement.And the problems such as polyoxymethylene easily ftractures in post-production process, distortion, affect job efficiency greatly, waste resource, increases cost.
Summary of the invention
The object of this invention is to provide a kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient and preparation method thereof.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient and preparation method thereof, is made up of the raw material of following weight part: polyoxymethylene 90-100, carbon fiber 10-30, ptfe micropowder 3-5, polyethylene micropowder 2-5, trimeric cyanamide 2-4, magnesium naphthenate 0.5-1, oxidation inhibitor MB0.3-0.5, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3;
A kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient of the present invention and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, magnesium naphthenate and antioxidant MB 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 the ethanolic soln containing 1% trioctyl trimellitate, ultrasonic 5-10 minute under 90W, add ptfe micropowder and polyethylene micropowder continuation dispersion 20-30 minute again, filter, precipitation uses distilled water flushing post-drying, and and silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use even, then carbon fiber is carried out shortly to cut, 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 tetrafluoroethylene added and polyethylene improve the frictional coefficient of polyoxymethylene itself, reduce friction resistance, the polyoxymethylene composite plastic made is widely used in bearing anti-attrition part.
specific embodiments
Below by specific examples, the present invention is described in detail.
A kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient and preparation method thereof, is made up of the raw material of following weight part (kilogram): polyoxymethylene 96, carbon fiber 23, ptfe micropowder 5, polyethylene micropowder 4, trimeric cyanamide 3, magnesium naphthenate 0.7, oxidation inhibitor MB0.5, silane resin acceptor kh-550 0.5, graphene oxide 4, nano silicon 3;
A kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient of the present invention and preparation method thereof, be made up of following concrete steps:
(1) polyoxymethylene, magnesium naphthenate and antioxidant MB mixing 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% trioctyl trimellitate, under 90W ultrasonic 8 minutes, add ptfe micropowder and polyethylene micropowder again and continue dispersion 30 minutes, filter, precipitation uses distilled water flushing post-drying, and and silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use even, then carbon fiber is carried out shortly to cut, 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 190 ° 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 180 ° of C, and screw speed is 90r/min.
In embodiment, the performance perameter of Carbon fibe enhancing acetal plastic is as follows:
Young's modulus (GPa): 18.3;
Tensile strength (MPa): 153;
Flexural strength (MPa): 175;
Elongation at break (%): 0.76;
Notched Izod impact strength (kJ/m-2): 16.1;
Static friction coefficient: 0.173.
Claims (3)
1. fibre reinforced polyformaldehyde composite material reducing frictional coefficient 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, ptfe micropowder 3-5, polyethylene micropowder 2-5, trimeric cyanamide 2-4, magnesium naphthenate 0.5-1, oxidation inhibitor MB0.3-0.5, silane resin acceptor kh-550 0.3-0.6, graphene oxide 2-4, nano silicon 2-3.
2. a kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient and preparation method thereof according to claim 1, is characterized in that, be made up of following concrete steps:
(1) polyoxymethylene, magnesium naphthenate and antioxidant MB 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 the ethanolic soln containing 1% trioctyl trimellitate, ultrasonic 5-10 minute under 90W, add ptfe micropowder and polyethylene micropowder continuation dispersion 20-30 minute again, filter, precipitation uses distilled water flushing post-drying, and and silane resin acceptor kh-550, nano silicon mixed grinding for subsequent use even, then carbon fiber is carried out shortly to cut, 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. a kind of fibre reinforced polyformaldehyde composite material reducing frictional coefficient according to claim 2 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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| CN201510062938.0A CN104672771A (en) | 2015-02-06 | 2015-02-06 | Carbon fiber reinforced polyformaldehyde composite material capable of reducing friction coefficient and preparation method thereof |
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| CN201510062938.0A CN104672771A (en) | 2015-02-06 | 2015-02-06 | Carbon fiber reinforced polyformaldehyde composite material capable of reducing friction coefficient and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365473A (en) * | 2017-09-05 | 2017-11-21 | 北京嘉倍通科技有限公司 | A kind of corrosion resisting bearing material and its preparation method and application |
| CN109627465A (en) * | 2018-12-03 | 2019-04-16 | 清华大学深圳研究生院 | Polyformaldehyde polymer composite and preparation method thereof, moulding material preparation method |
| CN114574161A (en) * | 2022-03-29 | 2022-06-03 | 扬州工业职业技术学院 | Friction material for brake pad |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319844A (en) * | 2012-03-21 | 2013-09-25 | 上海盈致橡塑制品有限公司 | Polyformaldehyde-resin-modified polytetrafluoroethylene alloy |
| CN103694623A (en) * | 2013-12-18 | 2014-04-02 | 河南能源化工集团研究院有限公司 | Flame-retardant anti-static polyformaldehyde resin based on composite halogen-free flame-retardant system |
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2015
- 2015-02-06 CN CN201510062938.0A patent/CN104672771A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319844A (en) * | 2012-03-21 | 2013-09-25 | 上海盈致橡塑制品有限公司 | Polyformaldehyde-resin-modified polytetrafluoroethylene alloy |
| CN103694623A (en) * | 2013-12-18 | 2014-04-02 | 河南能源化工集团研究院有限公司 | Flame-retardant anti-static polyformaldehyde resin based on composite halogen-free flame-retardant system |
Non-Patent Citations (1)
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| 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》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365473A (en) * | 2017-09-05 | 2017-11-21 | 北京嘉倍通科技有限公司 | A kind of corrosion resisting bearing material and its preparation method and application |
| CN109627465A (en) * | 2018-12-03 | 2019-04-16 | 清华大学深圳研究生院 | Polyformaldehyde polymer composite and preparation method thereof, moulding material preparation method |
| CN109627465B (en) * | 2018-12-03 | 2022-04-22 | 清华大学深圳研究生院 | Polyformaldehyde polymer composite material and preparation method thereof, and preparation method of molding material |
| CN114574161A (en) * | 2022-03-29 | 2022-06-03 | 扬州工业职业技术学院 | Friction material for brake pad |
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