CN103013090A - Polyaryletherketone composite material and application of the same in bridge bearing - Google Patents
Polyaryletherketone composite material and application of the same in bridge bearing Download PDFInfo
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Abstract
The present invention discloses a polyaryletherketone composite material and a preparation method thereof. The polyaryletherketone composite material comprises the following components, by weight, 40-99.8 parts of a polyaryletherketone resin, 0.1-20 parts of a polytetrafluoroethylene resin, 0-20 parts of fibers, 0.1-30 parts of a solid lubricant, and 0-15 parts of a filler, wherein various components are completely mixed and grinded into fine powder, and the fine powder is subjected to molding forming to prepare the material. According to the present invention, polyaryletherketone modification is performed so as to prepare the polyaryletherketone composite material with characteristics of high wear resistance and good lubricity; test results show that an average friction coefficient of the composite material is not higher than 0.15, and an average wear rate is less than 10<-8> mm<3>/Nm; and the polyaryletherketone composite material is made into a bridge bearing used in the bridge field, and a high elasticity polyurethane is matchedly adopted as a pressure bearing plate and sealing ring buffer material so as to substantially improve mechanical properties of the bridge bearing and improve a service life of the bridge bearing.
Description
Technical field
The present invention relates to a kind of polymer composite and application thereof, particularly a kind of polyaryletherketone matrix material and the application on bridge pad thereof.
Background technology
Fast development along with China's transportation industries, various Longspan Bridges, high-speed railway continue to bring out, thereby the supporting capacity of bridge pad and the requirement that adapts to displacement and corner ability thereof improved constantly, the novel bridge bearing that R and D adapt with it seems extremely important.In recent years, the main bridge pad of using is pot rubber bearing or spherical bearing in the domestic bridge industry.All adopt macromolecular material in the structure design of pot rubber bearing both at home and abroad, utilize the steel loading plate to solve the power transmission of bridge, will have the lubricant of good abrasion resistance as main damping moving parts.
At present mainly adopt pure tetrafluoroethylene as gliding material for the bridge bearing gliding material with good antidetonation slipping property both at home and abroad, yet PTFE assumed load ability is on the low side, load displacement speed is less than normal, wear rate is higher, and especially under the load long term, its creep properties is larger, the cold flow phenomenon occurs easily, thereby cause slide plate under the effect of long-term load, to have obvious distortion, change comparatively frequently, in use can not satisfy the requirements at the higher level of bridge bearing gliding material.Can adapt to the Working environment that load is larger, relative displacement speed is faster, the accumulative total slide displacement is longer and the wear resistance requirement is higher in the urgent need to finding a kind of material to be used for the bearing slide block in the industry.
Polyaryletherketone (PEEK) is a kind of novel special engineered material, because it has higher use temperature, intensity and dimensional stability obtain to use as far back as aerospace field, and alternative aluminium and other metallic substance are made various airplane components.In automotive industry, have good crocking resistance and mechanical property owing to the PEEK resin, be used as the starting material of making the engine inner cover, be widely adopted in rotation, brake and the air-conditioning system of automobile with various component such as the bearing of its manufacturing, pad, sealing member, clutch coupling ring gears.PEEK is dissolved in all outer solvents of the vitriol oil hardly, thereby usually is used for making compressor valve plate, piston ring, sealing member and various chemical pump body, valve part.PEEK not only has hard wear resistant, high rigidity, and anti-creep, high impact, the good characteristics such as bend ductility, resistance to fatigue is outstanding, and many chemical substances and solvent are had erosion resistance.But when it was applied to the bridge pad field, the frictional coefficient of polyaryletherketone was excessive, and lubricity is inadequate, and wear resistance is relatively poor, has greatly shortened the work-ing life of bridge pad.
For above-mentioned deficiency, need to carry out modification to polyaryletherketone, both can reduce the cost of polyaryletherketone, can reduce again the frictional coefficient of polyaryletherketone, strengthen its wear resistance, can replace tetrafluoroethylene to be used to make the abrasion resistance material of bridge bearing gliding.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of polyaryletherketone matrix material and preparation method thereof, prepare high-wearing feature, matrix material that self lubricity is good, and it specifically is applied in the bridge pad field, greatly improve the mechanical property of bridge pad and the work-ing life of improving bridge pad.
The objective of the invention is to be achieved through the following technical solutions: a kind of polyaryletherketone matrix material, comprise by weight following component: 40-99.8 part ketone-grouped resin, 0.1-20 part teflon resin, 0-20 part fiber, 0.1-30 part solid lubricant and 0-15 part filler, each component through fully mix and wear into fine powder after compression molding make.
Further, described ketone-grouped resin is the multipolymer of polyether-ether-ketone (PEEK), polyetherketone (PEK), polyether ether ketone ketone (PEEKK), polyethers biphenyl ether ketone (PEDEK), polyethers biphenyl ether ketone ketone (PEDEKK) or polyether-ether-ketone;
Further, described solid lubricant is one or more mixture in molybdenumdisulphide, graphite, carbon dust, silica powder, boron nitride, two selenizing niobiums and the nano-diamond powder;
Further, described fiber is carbon fiber, glass fibre, aramid fiber (Kevlar, Nomex or PBI fiber), graphite fibre or silicon carbide fiber, the diameter≤100um of fiber, and mean length is less than 50mm;
Further, described filler is one or more mixture in carbon black, tin bronze alloys, calcium carbonate and the calcium sulfate.
The present invention also provides this polyaryletherketone composite manufacture method, may further comprise the steps:
A, utilize mechanical mixer that the abundant pre-mixing of ketone-grouped resin, teflon resin, solid lubricant, fiber and filler is stirred;
B, process with the method for ball milling, fully blending dispersion is even again;
C, then put into baking oven, under 130-150 ℃ condition, toast 3h, to remove the moisture of mixture;
D, c step gained powder is packed in the mould, be forced into 1-3MPa, treat that temperature is elevated to 300-360 ℃, constant temperature 10-15min is in mold process, every the 5min venting once;
E, continue to be warmed up to 370-420 ℃, and slowly pressurization, when pressure reaches 2.5-10MPa, keep 10-60min, again with the speed cooling down of 10-50 ℃/min to 100-200 ℃, be incubated 1 hour and carry out Re-stress and process, die temperature is reduced to 100 ℃ can make the polyaryletherketone matrix material that outside surface has the oily cave of certain depth with bottom knockout.
The present invention also provides the application of this polyaryletherketone matrix material, is made into bridge pad and is applied to the bridge field.
Beneficial effect of the present invention: the present invention utilizes the excellent properties of polyaryletherketone, and it has been carried out modification, prepares to have high-wearing feature, keeps simultaneously the polyaryletherketone matrix material of good oilness.Through evidence, the average friction coefficient of this matrix material is not higher than 0.15, average abrasion speed＜10
-8Mm
3/ Nm.Be made into bridge pad and be applied to the bridge field, supporting employing high resilience polyurethane can improve the mechanical property of bridge pad and the work-ing life of improving bridge pad greatly as buffering bearing plate and sealing ring material.
Embodiment
Embodiment 1
(density of polyether-ether-ketone is 1.35g.cm to get 80 parts of PEEK resins
-3, size is less than 100um), 5 parts of polytetrafluoroethylene powders, (density is 1.67g.cm for carbon fiber mean diameter 100um, length 20mm for 5 parts of carbon fiber, graphite fibre or silicon carbide fibers
-3), 9 parts of molybdenumdisulphide, graphite or carbon dusts, 1 part of tin bronze alloys utilizes mechanical mixer that the abundant pre-mixing of this different materials is stirred; Process with the method for ball milling, fully dispersing and mixing is even, then puts into baking oven, carries out drying, and the moisture of mixture is sloughed again, and drying conditions is 130 ℃ of dry 3h; Above-mentioned powder is packed in the mould, be forced into 1MPa, treat that temperature is elevated to 340 ℃, constant temperature 15min is in above-mentioned mold process, every the 5min venting once.Continue to be warmed up under 400 ℃, and slowly pressurization, when pressure reaches 5MPa, and under this pressure, keep 30min, with the speed cooling down to 120 of 30 ℃/min ℃, be incubated 1 hour and carry out aftertreatment, with the elimination internal stress.Die temperature is reduced to 100 ℃ with bottom knockout.Compression molding obtains the polyaryletherketone composite slipper that there is oily cave on the surface.The sample of present embodiment preparation is sample one.
Embodiment 2
(density of polyether ether ketone ketone is 1.36g.cm to get 50 parts of PEEKK resins
-3), size is less than 200um, 20 parts of polytetrafluoroethylene powders, and 20 parts in glass fibre, 15 parts of nano-diamond powder or two selenizing niobiums, 15 parts in calcium carbonate or calcium sulfate utilize mechanical mixer that the abundant pre-mixing of this different materials is stirred; Process with the method for ball milling, fully dispersing and mixing is even, then puts into baking oven, carries out drying, and the moisture of mixture is sloughed again, and drying conditions is 135 ℃ of dry 3h; Above-mentioned powder is packed in the mould, be forced into 1.5MPa, treat that temperature is elevated to 350 ℃, constant temperature 15min is in above-mentioned mold process, every the 5min venting once.Continue to be warmed up under 400 ℃, and slowly pressurization, when pressure reaches 5MPa, and under this pressure, keep 40min, with the speed cooling down to 150 of 50 ℃/min ℃, be incubated 1 hour and carry out aftertreatment, with the elimination internal stress.Die temperature is reduced to 100 ℃ with bottom knockout.Compression molding obtains the polyaryletherketone composite slipper that there is oily cave on the surface.The sample of present embodiment preparation is sample two.
Embodiment 3
Get 70 parts of PEK or polyether-ether-ketone raw materials, 2 parts of Kevlar, Nomex or PBI fibers, 27 parts of molybdenumdisulphide, silica powder or boron nitride, 1 part of carbon black utilizes mechanical mixer that the abundant pre-mixing of this different materials is stirred; Process with the method for ball milling, fully dispersing and mixing is even, then puts into baking oven, carries out drying treatment, and the moisture of mixture is sloughed again, and drying conditions is 150 ℃ of dry 3h; Above-mentioned powder is packed in the mould, be forced into 3MPa, treat that temperature is elevated to 360 ℃, constant temperature 12min is in above-mentioned mold process, every the 5min venting once.Continue to be warmed up under 420 ℃, and slowly pressurization, when pressure reaches 10MPa, and under this pressure, keep 60min, with the speed cooling down to 200 of 20 ℃/min ℃, be incubated 1 hour and carry out aftertreatment, with the elimination internal stress.Die temperature is reduced to 100 ℃ with bottom knockout.Compression molding obtains the polyaryletherketone composite slipper that there is oily cave on the surface.The sample of present embodiment preparation is sample three.
Embodiment 4
Get 99 parts of PEEK raw materials, 0.5 part of Nano diamond, 0.5 part of polytetrafluoroethylene powder utilizes mechanical mixer that the abundant pre-mixing of this different materials is stirred; Process with the method for ball milling, fully dispersing and mixing is even, then puts into baking oven, carries out drying treatment again, and the moisture of mixture is sloughed, and drying conditions is 130 ℃ of lower dry 3h; Above-mentioned powder is packed in the mould, be forced into 3MPa, treat that temperature is elevated to 300 ℃, constant temperature 15min continues to be warmed up under 370 ℃, and slowly pressurization, when pressure reaches 10MPa, and under this pressure, keep 10min, with the speed cooling down to 100 of 10 ℃/min ℃, be incubated 1 hour and carry out aftertreatment, to eliminate internal stress.Die temperature is reduced to 100 ℃ with bottom knockout.In above-mentioned mold process, every the 5min venting once.Compression molding obtains the polyaryletherketone composite slipper that there is oily cave on the surface.The prepared sample of this embodiment is sample four.
Embodiment 5
Feeding according to the following formulation: 40 parts of polyethers biphenyl ether ketones (PEDEK), 0.1 part of teflon resin, 20 parts of glass fibre, the mean diameter 80um of fiber, the mixture of mean length 40mm, 30 parts of graphite, carbon dust and silica powders, 9.9 the mixture of part carbon black and tin bronze alloys utilizes mechanical mixer that its abundant pre-mixing is stirred; Process with the method for ball milling, fully blending dispersion is even again; Then put into baking oven, under 130 ℃ condition, toast 3h, to remove the moisture of mixture; The gained powder is packed in the mould, be forced into 1MPa, treat that temperature is elevated to 300 ℃, constant temperature 10min is in mold process, every the 5min venting once; Continue to be warmed up to 370 ℃, and slowly pressurization, when pressure reaches 2.5MPa, keep 10min, again with the speed cooling down to 100 of 10 ℃/min ℃, be incubated 1 hour and carry out Re-stress and process, die temperature is reduced to 100 ℃ can make the polyaryletherketone matrix material that outside surface has the oily cave of certain depth with bottom knockout.The sample of present embodiment preparation is sample five.
Embodiment 6
Feeding according to the following formulation: the mixture of 99.8 parts of polyether-ether-ketones, 0.1 part of teflon resin, 0.1 part of silica powder and boron nitride, utilize mechanical mixer that its abundant pre-mixing is stirred; Process with the method for ball milling, fully blending dispersion is even again; Then put into baking oven, under 150 ℃ condition, toast 3h, to remove the moisture of mixture; The gained powder is packed in the mould, be forced into 3MPa, treat that temperature is elevated to 360 ℃, constant temperature 15min is in mold process, every the 5min venting once; Continue to be warmed up to 420 ℃, and slowly pressurization, when pressure reaches 10MPa, keep 60min, again with the speed cooling down to 200 of 50 ℃/min ℃, be incubated 1 hour and carry out Re-stress and process, die temperature is reduced to 100 ℃ can make the polyaryletherketone matrix material that outside surface has the oily cave of certain depth with bottom knockout.The sample of present embodiment preparation is sample six.
Embodiment 7
Feeding according to the following formulation: 50 parts of polyethers biphenyl ether ketone ketone (PEDEKK), 10 parts of teflon resins, 10 parts of black fibers or silicon carbide fiber, the mixture of 20 parts of silica powders, boron nitride and two selenizing niobiums, 10 parts of carbon blacks, utilize mechanical mixer that its abundant pre-mixing is stirred; Process with the method for ball milling, fully blending dispersion is even again; Then put into baking oven, under 140 ℃ condition, toast 3h, to remove the moisture of mixture; The gained powder is packed in the mould, be forced into 2MPa, treat that temperature is elevated to 320 ℃, constant temperature 13min is in mold process, every the 5min venting once; Continue to be warmed up to 400 ℃, and slowly pressurization, when pressure reaches 6MPa, keep 40min, again with the speed cooling down to 150 of 30 ℃/min ℃, be incubated 1 hour and carry out Re-stress and process, die temperature is reduced to 100 ℃ can make the polyaryletherketone matrix material that outside surface has the oily cave of certain depth with bottom knockout.The sample of present embodiment preparation is sample seven.
Control sample
Get the PTFE fine powder and cold pressing in 28MPa, room temperature leaves standstill after 24 hours and made the PTFE slide block in 5 hours in 380 ℃ of constant temperature sintering.The sample of this example preparation is sample eight.
By each embodiment resulting materials is carried out various mechanical property tests, specifically draw following form testing data:
As can be seen from the above table, carry out modification polyaryletherketone matrix material afterwards by the inventive method, various mechanical properties are obviously improved, and are a kind of novel high polymer matrix materials that has application prospect.
Sample one and sample eight are carried out stiction and kinetic friction coefficient contrast, and the result is as shown in the table:
As can be seen from the above table: sample one is to the static friction coefficient μ of sample eight composite sliders and PTFE slide block
StAll lower and basic identical, and the kinetic friction coefficient μ of PEEK matrix material
DynBe starkly lower than the PTFE slide block, this shows that the PEEK composite slipper has the self-lubricating property more outstanding than PTFE slide block.
Be made into bridge pad and be applied to the bridge field, supporting employing high resilience polyurethane can improve the mechanical property of bridge pad and the work-ing life of improving bridge pad greatly as buffering bearing plate and sealing ring material.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of invention.
Claims (7)
1. polyaryletherketone matrix material, it is characterized in that, comprise by weight following component: 40-99.8 part ketone-grouped resin, 0.1-20 part teflon resin, 0-20 part fiber, 0.1-30 part solid lubricant and 0-15 part filler, each component through fully mix and wear into fine powder after compression molding make.
2. polyaryletherketone matrix material according to claim 1, it is characterized in that: described ketone-grouped resin is the multipolymer of polyether-ether-ketone (PEEK), polyetherketone (PEK), polyether ether ketone ketone (PEEKK), polyethers biphenyl ether ketone (PEDEK), polyethers biphenyl ether ketone ketone (PEDEKK) or polyether-ether-ketone.
3. polyaryletherketone matrix material according to claim 1 is characterized in that: described solid lubricant is one or more mixture in molybdenumdisulphide, graphite, carbon dust, silica powder, boron nitride, two selenizing niobiums and the nano-diamond powder.
4. polyaryletherketone matrix material according to claim 1, it is characterized in that: described fiber is carbon fiber, glass fibre, aramid fiber, graphite fibre or silicon carbide fiber, the diameter≤100um of fiber, mean length is less than 50mm.
5. polyaryletherketone matrix material according to claim 1 is characterized in that: described filler is one or more mixture in carbon black, tin bronze alloys, calcium carbonate and the calcium sulfate.
6. polyaryletherketone composite manufacture method claimed in claim 1 is characterized in that: may further comprise the steps:
A, utilize mechanical mixer that the abundant pre-mixing of ketone-grouped resin, teflon resin, solid lubricant, fiber and filler is stirred;
B, process with the method for ball milling, fully blending dispersion is even again;
C, then put into baking oven, under 130-150 ℃ condition, toast 3h, to remove the moisture of mixture;
D, c step gained powder is packed in the mould, be forced into 1-3MPa, treat that temperature is elevated to 300-360 ℃, constant temperature 10-15min is in mold process, every the 5min venting once;
E, continue to be warmed up to 370-420 ℃, and slowly pressurization, when pressure reaches 2.5-10MPa, keep 10-60min, again with the speed cooling down of 10-50 ℃/min to 100-200 ℃, be incubated 1 hour and carry out Re-stress and process, die temperature is reduced to 100 ℃ can make the polyaryletherketone matrix material that outside surface has the oily cave of certain depth with bottom knockout.
7. the application of a polyaryletherketone matrix material claimed in claim 1 is characterized in that: be made into bridge pad and be applied to the bridge field.
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