CN111303629A - High-temperature-resistant self-lubricating wear-resistant composite material and preparation method thereof - Google Patents
High-temperature-resistant self-lubricating wear-resistant composite material and preparation method thereof Download PDFInfo
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- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
- C08L81/02—Polythioethers; Polythioether-ethers
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- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
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- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a high-temperature-resistant self-lubricating wear-resistant composite material and a preparation method thereof, belonging to the field of high polymer materials. The composite material is prepared from the following raw materials in parts by weight: high temperature thermoplastic resin: 45-80 parts of; carbon fiber: 10-35; wear-resistant filler: 5-25; lubricant: 5-20 parts of; coupling agent: 0.5-3.0; the high-temperature-resistant self-lubricating wear-resistant composite material disclosed by the invention has the characteristics of excellent mechanical property, high temperature resistance, low friction coefficient and low wear loss, and can be widely applied to the fields of bearings, shaft sleeves, gears, retainers and the like.
Description
Technical Field
The invention belongs to the field of high-molecular wear-resistant materials, and particularly relates to a wear-resistant high-temperature-resistant self-lubricating composite material and a preparation method thereof.
Background
With the rapid development of industries such as aviation, aerospace, automobiles, ships, mechanical manufacturing and the like, transmission parts such as bearings, gears, shaft sleeves and the like are more and more widely applied. Since these transmission parts are in a high-speed rotating operating state for a long time, it is required that the material has a low friction coefficient and a low abrasion loss, thereby reducing energy loss and energy consumption.
The materials commonly used for manufacturing transmission parts such as bearings, gears, shaft sleeves and the like are metal materials and high polymer materials, and the metal materials have high specific gravity and are not suitable for precision equipment. The high polymer material has the characteristics of small specific gravity, good toughness, easy processing and the like, but a large amount of heat can be generated in the high-speed movement process, and the high polymer material is often deformed and loses efficacy.
The research progress of the polymer-based self-lubricating material, aeronautics report, volume 25, phase 2, 180-. It is also documented that the addition of chopped carbon fibers to resin-based composites can reduce the coefficient of friction and the rate of wear. The influence of the carbon fiber on the friction performance of the composite material is complicated, and the mechanical property of the composite material can be obviously improved by adding the carbon fiber. Graphite, MoS2The filler such as polytetrafluoroethylene is also in the field of composite materialsLubricating fillers are common, but they have a detrimental effect on the mechanical properties of the composite.
How to prepare the composite material with excellent mechanical property and self-lubricating property, high heat resistance, wear resistance and self-lubricating property is a technical bottleneck of the industry.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant wear-resistant self-lubricating composite material and a preparation method of the composite material. In order to realize the high-temperature-resistant wear-resistant self-lubricating composite material, the invention provides the following technical scheme: the composition comprises the following raw materials in parts by weight:
high temperature thermoplastic resin: 45-80 parts of;
carbon fiber: 10-35;
wear-resistant filler: 5-25;
lubricant: 5-20 parts of;
coupling agent: 0.5-3.0;
the high-temperature resistant thermoplastic resin is one or more of polyimide, polyetherimide, polyphenylene sulfide, polyether ether ketone, polyether sulfone and high-temperature nylon.
The carbon fiber contains one or two of PAN carbon fiber and pitch carbon fiber.
Further preferably, the carbon fiber includes both PAN-based carbon fiber and pitch carbon fiber.
Further preferably, the mass ratio of PAN-based carbon fibers to pitch carbon fibers in the carbon fibers is 1: 1-3.
Further, the carbon fiber preferably has a fiber length of 0.5 to 6mm and a diameter of 5 to 20 um.
Further, the addition amount of the carbon fiber is 15-25 parts by weight.
The wear-resistant filler is one or more of silicon carbide, boron carbide, aluminum nitride, silicon nitride, boron nitride, glass beads and the like.
Further preferably, the addition amount of the wear-resistant filler is 5 to 10 parts by weight.
The lubricant is one or more of polytetrafluoroethylene, graphite, molybdenum disulfide and silicone oil.
More preferably, the amount of the lubricant added is preferably 5 to 15 parts.
The coupling agent is one or two of silane coupling agent and titanate coupling agent.
The invention also provides a preparation method of the high-temperature-resistant wear-resistant self-lubricating composite material, which comprises the following steps:
s1, weighing the high-temperature-resistant thermoplastic resin, the wear-resistant filler, the lubricant and the coupling agent according to parts by weight, and mixing to obtain a mixture.
And S2, adding the mixture into a main feed of a double-screw extruder, adding the carbon fibers into a side feed of the double-screw extruder, and performing extrusion granulation to obtain the high-temperature-resistant self-lubricating wear-resistant composite material.
The melt extrusion temperature of the double-screw extruder is 280-380 ℃, and the screw rotating speed is 90-300 rpm/min.
The invention has the following advantages:
1. the thermal deformation temperature is high, the friction coefficient is low, the friction coefficient of the compound composite material of the asphalt carbon fiber and the lubricant can reach below 0.2, and the thermal deformation temperature can reach 275 ℃.
2. Low abrasion loss and good abrasion resistance. The carbon fibers and the powdery wear-resistant filler are compounded to form a net chain structure in the composite material, so that heat generated by friction is timely transmitted in the high-speed movement process, and the problem that the abrasion loss is increased due to decomposition of a resin material is solved.
3. The PAN carbon fiber with excellent mechanical property is compounded with the asphalt carbon fiber with good heat resistance and sliding property, so that the friction coefficient of the composite material is reduced, and the composite material can also have higher mechanical property. When the friction coefficient of the composite material is 0.2, the tensile strength of the composite material can reach 185 MPa.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention. The tensile strength of the invention is tested according to GB/T1040.2-2006, the bending strength is tested according to GB/T9341-2008, and the impact strength is tested according to GB/T1043.1-2008.
Example 1
50kg of polyphenylene sulfide, 5kg of silicon carbide, 5kg of polytetrafluoroethylene and 3kg of KH550 are uniformly stirred in a mixer, added into a main feeding hopper extruded by a double screw, and 30kg of PAN-series chopped carbon fiber and 10kg of asphalt-series carbon fiber are uniformly stirred in the mixer and added into a side feeding hopper of the double screw extruder.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to 280 ℃, 285 ℃, 300 ℃, 285 ℃ and 285 ℃. The rotation speed is 150 rpm/min.
Example 2
80kg of polyetherimide, 5kg of boron nitride, 3kg of polytetrafluoroethylene, 2kg of graphite and 1kg of KH550 are uniformly stirred in a mixer, added into a main feeding hopper of a double-screw extruder, and 10kg of PAN-series chopped carbon fiber is added into a side feeding hopper of the double-screw extruder.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to 340 ℃, 355 ℃, 365 ℃, 370 ℃, 365 ℃ and 365 ℃. The rotation speed is 110 rpm/min.
Example 3
55kg of polyether-ether-ketone, 5kg of silicon nitride, 5kg of hollow glass beads, 15kg of polytetrafluoroethylene, 5kg of silicone oil and 3kg of KH560 are uniformly stirred in a mixer and added into a main feeding hopper extruded by a double screw, and 10kg of PAN-series chopped carbon fiber and 5kg of asphalt-series carbon fiber are uniformly stirred in the mixer and added into a side feeding hopper of the double screw extruder.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to be 360 ℃, 370 ℃, 380 ℃, 390 ℃, 385 ℃, 380 ℃ and 375 ℃. The rotation speed is 150 rpm/min.
Example 4
45kg of polyether sulfone, 25kg of aluminum nitride, 7kg of polytetrafluoroethylene, 3kg of molybdenum disulfide and 1kg of KH550 are uniformly stirred in a mixer and added into a main feeding hopper extruded by a double screw, and 10kg of PAN-series chopped carbon fiber and 10kg of asphalt-series carbon fiber are uniformly stirred in the mixer and added into a side feeding hopper of the double screw extruder.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to 330 ℃, 340 ℃, 350 ℃, 360 ℃, 365 ℃, 360 ℃. The rotation speed is 150 rpm/min.
Comparative example 1
50kg of polyphenylene sulfide, 5kg of silicon carbide, 5kg of polytetrafluoroethylene and 3kg of KH550 are uniformly stirred in a mixer, added into a main feeding hopper extruded by a double screw, and 40kg of PAN series chopped carbon fiber is added into a side feeding hopper of the double screw extruder.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to 280 ℃, 285 ℃, 300 ℃, 285 ℃ and 285 ℃. The rotation speed is 150 rpm/min.
Comparative example 2
80kg of polyetherimide, 10kg of boron nitride, 5kg of polytetrafluoroethylene, 5kg of graphite and 1kg of KH550 are uniformly stirred in a mixer and added into a main feeding hopper extruded by a double screw.
Extruding and granulating the mixture in a double-screw extruder with the length-diameter ratio of 65, wherein the temperature of each section is set to 340 ℃, 355 ℃, 365 ℃, 370 ℃, 365 ℃ and 365 ℃. The rotation speed is 110 rpm/min.
The composite materials prepared in the above examples and comparative examples were subjected to performance tests with reference to national standards, and the results are shown in Table 1
The above table shows that the friction coefficient and the abrasion loss of the composite material can be obviously reduced by adding the pitch carbon fiber, and the compounding of the PAN carbon fiber and the pitch carbon fiber can reduce the friction coefficient of the composite material and endow the composite material with higher mechanical property.
Claims (10)
1. A composite material characterized by: comprises the following raw materials in parts by weight:
high-temperature resistant thermoplastic resin: 45-80 parts of;
carbon fiber: 10-35;
wear-resistant filler: 5-25;
lubricant: 5-20 parts of;
coupling agent: 0.5-3.0.
2. The composite material of claim 1, wherein: the high-temperature resistant thermoplastic resin is one or more of polyimide, polyetherimide, polyphenylene sulfide, polyether ether ketone, polyether sulfone and high-temperature nylon; the carbon fiber contains one or two of PAN carbon fiber and pitch carbon fiber.
3. The composite material of claim 1, wherein: the carbon fiber comprises PAN carbon fiber and pitch carbon fiber.
4. The composite material of claim 3, wherein: the mass ratio of PAN carbon fiber to pitch carbon fiber in the carbon fiber is 1: 1-3.
5. The composite material of claim 1, wherein: the carbon fiber preferably has a fiber length of 0.5-6mm and a diameter of 5-20 um.
6. The composite material of claim 1, wherein: the addition amount of the carbon fiber is 15-25 parts by weight.
7. The composite material of claim 1, wherein: the wear-resistant filler is one or more of silicon carbide, boron carbide, aluminum nitride, silicon nitride, boron nitride, glass beads and the like; the lubricant is one or more of polytetrafluoroethylene, graphite, molybdenum disulfide and silicone oil.
8. The composite material of claim 7, wherein: the addition amount of the wear-resistant filler is 5-10 parts by weight; the addition amount of the lubricant is preferably 5 to 15 parts.
9. The composite material of claim 1, wherein: the coupling agent is one or two of silane coupling agent and titanate coupling agent.
10. A method for preparing a composite material according to any one of claims 1 to 9, comprising the steps of:
s1, weighing the high-temperature-resistant thermoplastic resin, the wear-resistant filler, the lubricant and the coupling agent according to the mass parts, and mixing to obtain a mixture;
s2, adding the mixture into a main feed of a double-screw extruder, adding the carbon fibers into a side feed of the double-screw extruder, and performing extrusion granulation to obtain the high-temperature-resistant self-lubricating wear-resistant composite material; the melt extrusion temperature of the double-screw extruder is 280-380 ℃, and the screw rotating speed is 90-300 rpm/min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126230A (en) * | 2020-09-15 | 2020-12-25 | 暨南大学 | Wear-resistant polyether sulfone composite material and preparation method thereof |
| CN112194897A (en) * | 2020-09-15 | 2021-01-08 | 暨南大学 | Wear-resistant polyphenylene sulfone composite material and preparation method thereof |
| CN112226141A (en) * | 2020-09-27 | 2021-01-15 | 湘潭大学 | Composite coating and preparation method thereof |
| CN113024856A (en) * | 2021-03-15 | 2021-06-25 | 中国科学院兰州化学物理研究所 | Carbon fiber reinforced polyimide self-lubricating composite material and preparation method thereof |
| CN113292855A (en) * | 2021-05-07 | 2021-08-24 | 青岛科技大学 | Thermoplastic special engineering plastic PPS/PI alloy material and preparation method thereof |
| CN113908633A (en) * | 2021-10-25 | 2022-01-11 | 安徽欣创节能环保科技股份有限公司 | Low-resistance high-efficiency bag type dust collector based on high-strength filter bag |
| CN114381113A (en) * | 2021-12-30 | 2022-04-22 | 昆山科运新型工程材料科技有限公司 | Preparation method of self-lubricating high-wear-resistance fluorine-containing polymer alloy |
| CN116622232A (en) * | 2023-07-20 | 2023-08-22 | 广州傲群刷业科技有限公司 | Wear-resistant composite material, wire drawing process thereof and application of wear-resistant composite material in hairbrush |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126230A (en) * | 2020-09-15 | 2020-12-25 | 暨南大学 | Wear-resistant polyether sulfone composite material and preparation method thereof |
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| CN112226141A (en) * | 2020-09-27 | 2021-01-15 | 湘潭大学 | Composite coating and preparation method thereof |
| CN113024856A (en) * | 2021-03-15 | 2021-06-25 | 中国科学院兰州化学物理研究所 | Carbon fiber reinforced polyimide self-lubricating composite material and preparation method thereof |
| CN113024856B (en) * | 2021-03-15 | 2022-03-01 | 中国科学院兰州化学物理研究所 | Carbon fiber reinforced polyimide self-lubricating composite material and preparation method thereof |
| CN113292855A (en) * | 2021-05-07 | 2021-08-24 | 青岛科技大学 | Thermoplastic special engineering plastic PPS/PI alloy material and preparation method thereof |
| CN113908633A (en) * | 2021-10-25 | 2022-01-11 | 安徽欣创节能环保科技股份有限公司 | Low-resistance high-efficiency bag type dust collector based on high-strength filter bag |
| CN114381113A (en) * | 2021-12-30 | 2022-04-22 | 昆山科运新型工程材料科技有限公司 | Preparation method of self-lubricating high-wear-resistance fluorine-containing polymer alloy |
| CN116622232A (en) * | 2023-07-20 | 2023-08-22 | 广州傲群刷业科技有限公司 | Wear-resistant composite material, wire drawing process thereof and application of wear-resistant composite material in hairbrush |
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Application publication date: 20200619 |