CN101386699A - Abrasion-proof self-lubricating composite material and its preparation method - Google Patents
Abrasion-proof self-lubricating composite material and its preparation method Download PDFInfo
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- CN101386699A CN101386699A CN 200710018806 CN200710018806A CN101386699A CN 101386699 A CN101386699 A CN 101386699A CN 200710018806 CN200710018806 CN 200710018806 CN 200710018806 A CN200710018806 A CN 200710018806A CN 101386699 A CN101386699 A CN 101386699A
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Abstract
The invention relates to an abrasion resistant self-lubricating composite material and a preparation method thereof. The raw materials in weight percentage of the material are: 1 to 15 percent of nano-porous silicon dioxide and 85 to 99 percent of suspended PTFE resin moulding powder. The material can be widely applied to the fields of lubricating, sealing and so on, is made into various parts such as bushes, sealing rings, guiding rings and so on, and is suitable for the working occasions at ultralow temperature and ultrahigh temperature, such as oil forbidden self-lubricating abrasion resistant parts of ultralow temperature refrigerating machines, liquid fuel pumps, high pressure pumps, oxygen generating devices, high temperature driers, conveyor belts inside furnaces, medicines and foods and so on, and dynamic seals of liquid or gas of an engine.
Description
Technical field
The present invention relates to a kind of abrasion-proof self-lubricating composite material and preparation method thereof.
Background technology
Polytetrafluoroethylene (PTFE) has excellent thermotolerance, erosion resistance and dielectric properties, especially its unique Abherent and self lubricity, and it is not only paid attention to widely at chemical industry, electric utility but also in machinery, electron trade.But pure tetrafluoroethylene existence significantly wears no resistance, the shortcoming of creep resistant difference, and its range of application and effect are very restricted.Usually adopt the inorganic particle filled modified ptfe of micron order.But, still there is certain limitation in the filling-modified polytetrafluoroethylmaterial material of micro-size particles, increase as frictional coefficient, toughness significantly reduces, and hardness, creep resistant and wear resistance and inorganic content are closely related, when inorganic content is low, hardness and creep resistant change little, wear resistance is also improved not obvious, and inorganic content is when high slightly, and wear resistance and creep resistant are on a declining curve again.In addition, the polytetrafluoroethylmaterial material processing characteristics of the inorganic particle filled modification of micron order is also bad.
Nano-stephanoporate silicon dioxide has cellular porous structure, is the novel material with excellent properties that develops rapidly in recent years, has many micron orders or the not available physicochemical property of common nano material.Owing to have the duct of rule on its micro-scale and have big constitutional featuress such as specific surface, have important and extensive studies and application in fields such as catalysis, absorption, filtration, environmental protection and modified composite materials.Nano-stephanoporate silicon dioxide has small size, and (particle diameter is about 2～100nm), and high surface energy and high-specific surface area (are up to 1000m
2/ g), high porosity (being up to more than 90%), low density (the minimum 0.02g/cm of reaching
3) and property such as high temperature tolerance (high-temperature resistant can reach 1000 ℃), be filled in the polymkeric substance, can produce very strong interface interaction and good modified effect with matrix.And nano-stephanoporate silicon dioxide has raw material and is easy to get, and preparation is simple, advantages such as physics and stable chemical performance.Therefore, nano-stephanoporate silicon dioxide is applied in plastics and the rubber, will obviously improves the wear resistance and the mechanical property of material.Up to now, both at home and abroad also not about research report with nano-stephanoporate silicon dioxide modified Teflon material property.
Chinese invention patent CN 1176153C discloses a kind of PTFE anti-wear composite material that contains carbon nanotube, Chinese invention patent CN 1844228A discloses a kind of preparation method of rare earth modified carbon nanotube pipe/ptfe composite, Chinese invention patent CN 1775846A discloses a kind of PTFE anti-wear composite material that contains the transition metal dichalcogenide nanotube, and Chinese invention patent CN 1699464A discloses a kind of nanometer Si
3N
4The preparation method of/PTFE anti-wear composite material, but weighting material carbon nanotube, rare earth modified carbon nanotube pipe, transition metal dichalcogenide nanotube and nanometer Si
3N
4All exist preparation technology loaded down with trivial details, cost an arm and a leg, therefore the and weak point of unstable properties, is not suitable for using and producing in batches.
Chinese invention patent CN 1221646C discloses a kind of nano-material modified polytetrafluoroethyloil oil seals dedicated set compound and preparation method thereof, but what adopt is common nano inoganic particle, it is limited that hardness, creep resistance and the wear resistance of material are improved degree, and its main application is an oil sealing PP Pipe Compound composition.
Summary of the invention
The purpose of this invention is to provide a kind of abrasion-proof self-lubricating composite material and preparation method thereof.
Form friction pair by tetrafluoroethylene and metal, when both relatively sliding, because the effect of frictional force, polymeric surface layer generation viscous deformation is transferred to the metallic surface and is formed transfer film, thereby causes adhesive wear.With the particle modified ptfe composite of nano-stephanoporate silicon dioxide, since the existence of nano redigity particle, the viscous deformation that has slowed down material, so adhesive wear alleviates.In addition, compare with the ptfe composite of common fine-grained particles modification, the particle modified ptfe composite of nano-stephanoporate silicon dioxide is subjected to the chance of abrasive wear also very little.This is because the uncompatibility of common inorganic particles and tetrafluoroethylene is apparent in view, in friction process, come off from friction surface easily, become the abrasive particle that is mixed in the friction pair, cause abrasive wear, and for the nano-stephanoporate silicon dioxide particle, because the specific surface area of nanoparticle increases, increase with the matrix contact area, and porous shape nanoparticle surface defective is many, the active centre is many, and is just many with the point of application of polymeric matrix, therefore be easy to and the PTFE substrate molecule between physics and chemical action take place, increase contacts and infiltration with matrix, thereby more helps combining closely of nano-stephanoporate silicon dioxide particle and PTFE matrix.When the external force that is subjected to rubbing is done the time spent, particle is difficult for breaking away from matrix.And, the nanoporous particle that splits away off individually, because the surface has very high activity, under the effect of load and friction Temperature Rise, can be embedded in the hardness that surface of friction pair improves transfer film on the one hand, make transfer film become fine and close and even, difficult drop-off, thus play repair to surface of friction pair; Can produce rich long-pending on the other hand again at the ptfe composite wear surface, the quilt nanoporous particle of embedded composite material has again almost covered whole wear surface gradually, and at the complete lubricant film of worn composite surface formation, thereby the friction reality of the ptfe composite of nano-stephanoporate silicon dioxide filling and mating plate has been converted into the friction between the nanoporous particle lubricant film, the probability that the PTFE matrix is is directly worn and torn further reduces, thereby has improved the wear resistance of ptfe composite.
A kind of abrasion-proof self-lubricating composite material is characterized in that the raw material weight per-cent of material is: nano-stephanoporate silicon dioxide 1～15%, suspended PTFE resin molding powder 85～99%.
Loose density＜the 0.12g/cm of the nano-stephanoporate silicon dioxide powder that the present invention is used
3, median size is 15～30nm, specific surface area is 600～1000m
2/ g.
The particle diameter of the suspended PTFE resin molding powder that the present invention is used is 10～50 μ m.
The preparation method of abrasion-proof self-lubricating composite material of the present invention in turn includes the following steps:
A, nano-stephanoporate silicon dioxide is added in the suspended PTFE resin molding powder, place mould, under 40～80MPa, pressurize 1～10min, coldmoulding;
B, the sample of compression moulding is put into high temperature sintering furnace,, be warming up to 370～385 ℃ then, after soaking time 2-3 hour, obtain matrix material 300-350 ℃ of insulation 1～1.5 hour.
Advantage of the present invention and positively effect are: by the abrasion-proof self-lubricating composite material of above-mentioned prescription and preparation method's preparation, the surface effects and the interfacial effect of nano-stephanoporate silicon dioxide mystery have been utilized, make it in the PTFE matrix, can reach high dispersing, the interface is in conjunction with good, and its porous feature and small-size effect have been eliminated the interface compatibility problem that organism and inorganics because thermal expansion coefficient difference etc. cause.Compare with the ptfe composite that the common particulate of tradition is filled, that this class matrix material is significantly high temperature resistant, super is wear-resisting, loss in toughness is little, and hardness and creep resistant improve outstanding feature.
Fields such as material of the present invention can be widely used in lubricating, sealing, be made into parts such as various linings, wear ring, guide ring, be applicable to the workplace under very low temperature～high temperature, such as the dynamic seal of the oily self-lubricating abrasion-resistant parts of the taboo of travelling belt, medicine, food etc. in ultra-low temperature refrigerating device, liquid fuel feed pump, high-pressure hydraulic pump, oxygen generating plant, high-temperature drier, the stove, motor fluid or gas.
The ptfe composite performance that nano-stephanoporate silicon dioxide and common particulate are filled relatively
Annotate: according to the friction and wear behavior of GB GB 3960-83 test materials, metal to-metal contact under the room temperature, antithesis is the GCr15 steel loop.
Embodiment
The prescription of embodiment 1～embodiment 5
Press the matrix material of the formulation of embodiment 1～embodiment 5, its preparation method in turn includes the following steps:
A, nano-stephanoporate silicon dioxide is added in the suspended PTFE resin molding powder, place mould, under 40～80MPa, pressurize 1～10min, coldmoulding;
B, the sample of compression moulding is put into high temperature sintering furnace,, be warming up to 370～385 ℃ then, after soaking time 2-3 hour, obtain matrix material 300-350 ℃ of insulation 1～1.5 hour.
The product performance of embodiment 1～embodiment 5
Annotate: according to the friction and wear behavior of GB GB 3960-83 test materials, metal to-metal contact under the room temperature, antithesis is the GCr15 steel loop.
Claims (4)
1, a kind of abrasion-proof self-lubricating composite material is characterized in that the raw material weight per-cent of material is: nano-stephanoporate silicon dioxide 1～15%, suspended PTFE resin molding powder 85～99%.
2, material according to claim 1 is characterized in that the loose density＜0.12g/cm of nano-stephanoporate silicon dioxide powder
3, median size is 15～30nm, specific surface area is 600～1000m
2/ g.
3, material according to claim 1, the particle diameter that it is characterized in that suspended PTFE resin molding powder are 10～50 μ m.
4, preparation methods according to claim 1 is characterized in that this method in turn includes the following steps:
A, nano-stephanoporate silicon dioxide is added in the suspended PTFE resin molding powder, place mould, under 40～80MPa, pressurize 1～10min, coldmoulding;
B, the sample of compression moulding is put into high temperature sintering furnace,, be warming up to 370～385 ℃ then, after soaking time 2-3 hour, obtain material 300-350 ℃ of insulation 1～1.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710018806 CN101386699A (en) | 2007-09-14 | 2007-09-14 | Abrasion-proof self-lubricating composite material and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710018806 CN101386699A (en) | 2007-09-14 | 2007-09-14 | Abrasion-proof self-lubricating composite material and its preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN101386699A true CN101386699A (en) | 2009-03-18 |
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|---|---|---|---|
| CN 200710018806 Pending CN101386699A (en) | 2007-09-14 | 2007-09-14 | Abrasion-proof self-lubricating composite material and its preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387697A (en) * | 2013-08-14 | 2013-11-13 | 安徽中鼎密封件股份有限公司 | Stabilizer bar bushing and preparation method thereof |
| CN109337350A (en) * | 2018-09-11 | 2019-02-15 | 东莞市雄林新材料科技股份有限公司 | A kind of heatproof TPU film for automobile interiors and preparation method thereof |
-
2007
- 2007-09-14 CN CN 200710018806 patent/CN101386699A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387697A (en) * | 2013-08-14 | 2013-11-13 | 安徽中鼎密封件股份有限公司 | Stabilizer bar bushing and preparation method thereof |
| CN103387697B (en) * | 2013-08-14 | 2015-08-12 | 安徽中鼎密封件股份有限公司 | A kind of stabilizer bar bushing and preparation method thereof |
| CN109337350A (en) * | 2018-09-11 | 2019-02-15 | 东莞市雄林新材料科技股份有限公司 | A kind of heatproof TPU film for automobile interiors and preparation method thereof |
| CN109337350B (en) * | 2018-09-11 | 2021-02-12 | 东莞市雄林新材料科技股份有限公司 | Temperature-resistant TPU film for automotive interior and preparation method thereof |
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Open date: 20090318 |