CN103788551A - Polytetrafluoroethylene composite material and preparation method thereof - Google Patents
Polytetrafluoroethylene composite material and preparation method thereof Download PDFInfo
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- CN103788551A CN103788551A CN201410015514.4A CN201410015514A CN103788551A CN 103788551 A CN103788551 A CN 103788551A CN 201410015514 A CN201410015514 A CN 201410015514A CN 103788551 A CN103788551 A CN 103788551A
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- ptfe composite
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Abstract
The invention provides a polytetrafluoroethylene composite material. The polytetrafluoroethylene composite material contains Ti3SiC2 or Ti3AlC2. The present invention also provides a preparation method of the polytetrafluoroethylene composite material and comprises the following steps: mixing the pure polytetrafluoroethylene with Ti3SiC2 or Ti3AlC2, carrying out cold press molding and sintering on the mixture, so as to obtain the polytetrafluoroethylene composite material. The polytetrafluoroethylene composite material has high wearing feature, simple production process and low cost, and can achieve large-scale industrialization production.
Description
Technical field
The invention belongs to polymer modification technical field, be specifically related to a kind of ptfe composite and preparation method thereof.
Background technology
Tetrafluoroethylene has excellent erosion resistance, thermotolerance and thermostability, and there is very wide use temperature scope and lower frictional coefficient, also there is in addition outstanding flame retardant resistance, good electrical insulating property, non-viscosity and physiological compatibility, be widely used in the fields such as aerospace, petrochemical complex, machinery, electronics, building and medical treatment.But the wear resistance of pure tetrafluoroethylene is poor, its application is restricted.
Adopt at present several different methods to improve the wear resisting property of polytetrafluoroethylmaterial material, wherein filling-modified is very convenient and efficient manner, in tetrafluoroethylene, the nano material such as micron order material and filling carbon nano-pipe or Graphene such as filled glass fiber, carbon fiber or graphite all can be improved the wear resisting property of polytetrafluoroethylmaterial material effectively, but there is complex process in aforesaid method, cost is higher, improves the problems such as effect is undesirable.For example Chinese invention patent 200510061587.8 discloses a kind of PTFE anti-wear composite material of containing metal sulfide nano-tube, this matrix material has good wear resisting property, but the packing material nano metal sulfide pipe that it adopts is expensive, and technique is more complicated, be not suitable for producing in enormous quantities.
Therefore the wear resisting property that, how adopting process is simple, production cost is lower and the method for applicable production in enormous quantities improves polytetrafluoroethylmaterial material becomes this area problem demanding prompt solution.
Summary of the invention
For the problems referred to above, one object of the present invention is to provide a kind of ptfe composite, this composite material by adopting Ti
3siC
2or Ti
3alC
2as packing material preparation, production technique is simple, and cost is lower, can realize large-scale industrialization and produce.
Another object of the present invention is to provide a kind of preparation method of ptfe composite.
For achieving the above object, the invention provides a kind of ptfe composite, in described ptfe composite, contain Ti
3siC
2or Ti
3alC
2.
Preferably, the Ti that contains the preferred 1-5wt% of 1-10wt% in described ptfe composite
3siC
2or Ti
3alC
2.
Preferably, described ptfe composite is by the Ti of 1-10wt%
3siC
2or Ti
3alC
2make with the pure tetrafluoroethylene of 90-99wt%.
Preferably, described ptfe composite is by the Ti of 1-5wt%
3siC
2or Ti
3alC
2make with the pure tetrafluoroethylene of 95-99wt%.
Preferably, described Ti
3siC
2and Ti
3alC
2particle diameter be 30-50 μ m.
Preferably, the particle diameter of described pure tetrafluoroethylene is 50-100 μ m.
The present invention further provides the preparation method of above-mentioned ptfe composite, described preparation method comprises: by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix, then carry out coldmoulding and sintering, obtain ptfe composite.
Preferably, described preparation method comprises:
Step a: by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix, obtain mixture;
Step b: by mixture compression moulding under 15-25 ℃ and the preferred 30MPa of 30-60Mpa;
Step c: the mixture that step b is obtained sintering in air obtains ptfe composite.
Preferably, in described step a, by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix 30-120min, preferably 30min, obtains mixture.
Preferably, in described step c, the mixture that step b is obtained in air with 60-100 ℃/h, preferably the temperature rise rate of 100 ℃/h is heated to 300 ℃, with 50-80 ℃/h, preferably the temperature rise rate of 60 ℃/h is heated to 370 ℃ again, is incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
Compared with prior art, ptfe composite of the present invention and preparation method thereof at least has the following advantages:
One, the present invention adopts Ti
3siC
2or Ti
3alC
2prepare ptfe composite as packing material, wherein Ti
3siC
2and Ti
3alC
2for having the stratiform ternary compound of pottery and metal premium properties concurrently, there is good mechanical property and the self-lubricating property of similar graphite, the experiment proved that, adopt Ti
3siC
2or Ti
3alC
2the ptfe composite of preparing as packing material has good wear resistance and lower frictional coefficient, wherein adds and fills Ti
3siC
2or Ti
3alC
2the wear rate of ptfe composite be only the 1/100-1/500 of pure polytetrafluoroethylmaterial material, the ptfe composite that therefore prepared by the present invention has high-wearing feature, can be widely used in space flight, chemical industry, medical treatment and the field such as mechanical;
Two, the present invention adopts the relatively cheap Ti of price
3siC
2or Ti
3alC
2prepare ptfe composite as packing material, production technique is simple, and cost is lower, can realize large-scale industrialization and produce.
Embodiment
Referring to specific embodiment, the present invention is described.It will be appreciated by those skilled in the art that these embodiment are only for the present invention is described, the scope that it does not limit the present invention in any way.
Experimental technique in following embodiment, if no special instructions, is ordinary method.In following embodiment, reagent material used etc., if no special instructions, is commercially available purchase product.
embodiment 1
By the Ti of 5wt%
3siC
2(particle diameter is about 30-50 μ, and m) (particle diameter is about 50-100 μ and m) puts into mixer mixing 30min powder with the pure polytetrafluorethylepowder powder of 95wt%, subsequently by mixture compression moulding under 15-25 ℃, 30MPa, then sample is put into sintering oven, in air, be heated to 300 ℃ with the temperature rise rate of 100 ℃/h, be heated to 370 ℃ with the temperature rise rate of 60 ℃/h again, be incubated 2 hours, then naturally cool to room temperature, obtain containing 5wt%Ti
3siC
2ptfe composite.
This embodiment is suitable for preparing the ptfe composite of different shape.As a comparison, adopt method same as described above and the component proportions preparation ptfe composite containing 5wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 5wt%Ti
3siC
2ptfe composite and containing the ptfe composite of 5wt% graphite with 45# steel to grinding, (contact pressure 3.18MPa under identical friction testing condition, 0.4m/s, 1h, room temperature) wear resistance of test material, the frictional coefficient that test obtains pure polytetrafluoroethylmaterial material is 0.162, containing 5wt%Ti
3siC
2the frictional coefficient of ptfe composite be 0.156, its wear rate is pure polytetrafluoroethylmaterial material 1/360; And be 0.158 containing the frictional coefficient of the ptfe composite of 5wt% graphite, its wear rate is pure polytetrafluoroethylmaterial material 1/50.
embodiment 2
By the Ti of 5wt%
3alC
2(particle diameter is about 30-50 μ, and m) (particle diameter is that 50-100 μ m) puts into mixer mixing 30min to powder with the pure polytetrafluorethylepowder powder of 95wt%, subsequently by mixture compression moulding under 15-25 ℃, 30MPa, then sample is put into sintering oven, in air, be heated to 300 ℃ with the temperature rise rate of 100 ℃/h, be heated to 370 ℃ with the temperature rise rate of 60 ℃/h again, be incubated 2 hours, then naturally cool to room temperature, obtain containing 5wt%Ti
3alC
2ptfe composite.
Respectively by the above-mentioned 5wt%Ti that contains
3alC
2ptfe composite and pure polytetrafluoroethylmaterial material and 45# steel to mill, the wear resistance of test material under the friction testing condition identical with embodiment 1, test obtains above-mentioned containing 5wt%Ti
3alC
2the frictional coefficient of ptfe composite be 0.150, its wear rate is pure polytetrafluoroethylmaterial material 1/300.
embodiment 3
By the Ti of 10wt%
3siC
2(particle diameter is about 30-50 μ, and m) (particle diameter is that 50-100 μ m) puts into mixer mixing 30min to powder with the pure polytetrafluorethylepowder powder of 90wt%, subsequently by mixture compression moulding under 15-25 ℃, 30MPa, then sample is put into sintering oven, in air, be heated to 300 ℃ with the temperature rise rate of 100 ℃/h, be heated to 370 ℃ with the temperature rise rate of 60 ℃/h again, be incubated 2 hours, then naturally cool to room temperature, obtain containing 10wt%Ti
3siC
2ptfe composite.
As a comparison, adopt method same as described above and the component proportions preparation ptfe composite containing 10wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 10wt%Ti
3siC
2ptfe composite and containing the ptfe composite of 10wt% graphite with 45# steel to mill, the wear resistance of test material under the friction testing condition identical with embodiment 1, test obtains containing 10wt%Ti
3siC
2the frictional coefficient of ptfe composite be 0.155, its wear rate is pure polytetrafluoroethylmaterial material 1/500; And be 0.156 containing the frictional coefficient of the ptfe composite of 10wt% graphite, its wear rate is pure polytetrafluoroethylmaterial material 1/120.
embodiment 4
By the Ti of 1wt%
3siC
2(particle diameter is about 30-50 μ, and m) (particle diameter is that 50-100 μ m) puts into mixer mixing 30min to powder with the pure polytetrafluorethylepowder powder of 99wt%, subsequently by mixture compression moulding under 15-25 ℃, 30MPa, then sample is put into sintering oven, in air, be heated to 300 ℃ with the temperature rise rate of 100 ℃/h, be heated to 370 ℃ with the temperature rise rate of 60 ℃/h again, be incubated 2 hours, then naturally cool to room temperature, obtain containing 1wt%Ti
3siC
2ptfe composite.
As a comparison, adopt method same as described above and the component proportions preparation ptfe composite containing 1wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 1wt%Ti
3siC
2ptfe composite and containing the ptfe composite of 1wt% graphite with 45# steel to mill, the wear resistance of test material under the friction testing condition identical with embodiment 1, test obtains containing 1wt%Ti
3siC
2the frictional coefficient of ptfe composite be 0.16, its wear rate is pure polytetrafluoroethylmaterial material 1/100; And be 0.165 containing the frictional coefficient of the ptfe composite of 1wt% graphite, its wear rate is pure polytetrafluoroethylmaterial material 1/3.
embodiment 5
By the Ti of 2wt%
3siC
2(particle diameter is about 30-50 μ, and m) (particle diameter is that 50-100 μ m) puts into mixer mixing 30min to powder with the pure polytetrafluorethylepowder powder of 98wt%, subsequently by mixture compression moulding under 15-25 ℃, 30MPa, then sample is put into sintering oven, in air, be heated to 300 ℃ with the temperature rise rate of 100 ℃/h, be heated to 370 ℃ with the temperature rise rate of 60 ℃/h again, be incubated 2 hours, then naturally cool to room temperature, obtain containing 2wt%Ti
3siC
2ptfe composite.
As a comparison, adopt method same as described above and the component proportions preparation ptfe composite containing 2wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 2wt%Ti
3siC
2ptfe composite and containing the ptfe composite of 2wt% graphite with 45# steel to mill, the wear resistance of test material under the friction testing condition identical with embodiment 1, test obtains containing 2wt%Ti
3siC
2the frictional coefficient of ptfe composite be 0.157, its wear rate is pure polytetrafluoroethylmaterial material 1/260; And be 0.160 containing the frictional coefficient of the ptfe composite of 2wt% graphite, its wear rate is pure polytetrafluoroethylmaterial material 1/8.
The polishing machine test data of the ptfe composite of preparing in above-described embodiment 1-5 is as shown in table 1.
The polishing machine of ptfe composite test in table 1 embodiment 1-5
As seen from Table 1, the present invention adopts and fills Ti
3siC
2or Ti
3alC
2the frictional coefficient of the ptfe composite of preparation is a little less than the frictional coefficient of the ptfe composite that adopts filling graphite to prepare under the same terms, its wear rate is only the 1/100-1/500 of pure polytetrafluoroethylmaterial material, and the 1/3-1/120 that the wear rate of ptfe composite prepared by the graphite of employing filling is under the same conditions pure polytetrafluoroethylmaterial material, the 1/113-1/210 that in patent 200510061587.8, the wear rate of the PTFE anti-wear composite material of disclosed containing metal sulfide nano-tube is pure polytetrafluoroethylmaterial material in addition, find out thus, with respect to existing ptfe composite, ptfe composite prepared by the present invention has preferably wear resisting property.
Specific description of embodiments of the present invention above does not limit the present invention, and those skilled in the art can make according to the present invention various changes or distortion, only otherwise depart from spirit of the present invention, all should belong to the scope of claims of the present invention.
Claims (10)
1. a ptfe composite, contains Ti in described ptfe composite
3siC
2or Ti
3alC
2.
2. ptfe composite according to claim 1, is characterized in that, contains the Ti of the preferred 1-5wt% of 1-10wt% in described ptfe composite
3siC
2or Ti
3alC
2.
3. ptfe composite according to claim 1 and 2, is characterized in that, described ptfe composite is by the Ti of 1-10wt%
3siC
2or Ti
3alC
2make with the pure tetrafluoroethylene of 90-99wt%.
4. ptfe composite according to claim 3, is characterized in that, described ptfe composite is by the Ti of 1-5wt%
3siC
2or Ti
3alC
2make with the pure tetrafluoroethylene of 95-99wt%.
5. according to the ptfe composite described in any one in claim 1-4, it is characterized in that described Ti
3siC
2and Ti
3alC
2particle diameter be 30-50 μ m.
6. according to the ptfe composite described in any one in claim 3-5, it is characterized in that, the particle diameter of described pure tetrafluoroethylene is 50-100 μ m.
7. according to the preparation method of the ptfe composite described in any one in claim 1-6, described preparation method comprises: by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix, then carry out coldmoulding and sintering, obtain ptfe composite.
8. preparation method according to claim 7, is characterized in that, described preparation method comprises:
Step a: by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix, obtain mixture;
Step b: by mixture compression moulding under 15-25 ℃ and the preferred 30MPa of 30-60Mpa;
Step c: the mixture that step b is obtained sintering in air obtains ptfe composite.
9. according to the preparation method described in claim 7 or 8, it is characterized in that, in described step a, by pure tetrafluoroethylene and Ti
3siC
2or Ti
3alC
2mix 30-120min, preferably 30min, obtains mixture.
10. according to the preparation method described in any one in claim 7-9, it is characterized in that, in described step c, the mixture that step b is obtained is with 60-100 ℃/h in air, and preferably the temperature rise rate of 100 ℃/h is heated to 300 ℃, then with 50-80 ℃/h, preferably the temperature rise rate of 60 ℃/h is heated to 370 ℃, be incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105924862A (en) * | 2016-06-07 | 2016-09-07 | 扬州大学 | Method for preparing composite polytetrafluoroethene conductive material |
CN106633552A (en) * | 2016-12-18 | 2017-05-10 | 余姚市庆达机械有限公司 | Environment-friendly composite engineering plastic |
CN109021471A (en) * | 2018-08-09 | 2018-12-18 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
CN110358230A (en) * | 2019-08-18 | 2019-10-22 | 赵伟芬 | Anti abrasive PTFE based composites under a kind of dry friction |
CN111073185A (en) * | 2019-12-04 | 2020-04-28 | 沈阳化工大学 | B4Preparation method of C/polytetrafluoroethylene composite material |
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WO2012177712A1 (en) * | 2011-06-21 | 2012-12-27 | Drexel University | Compositions comprising free standing two dimensional nanocrystals |
CN103515600A (en) * | 2013-10-14 | 2014-01-15 | 天津大学 | Ti3SiC2 and carbon composite modified LiFePO4 lithium ion battery anode material and preparation method thereof |
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CN102022544A (en) * | 2011-01-06 | 2011-04-20 | 武汉理工大学 | Mechanical seal friction pair material and preparation method thereof |
WO2012177712A1 (en) * | 2011-06-21 | 2012-12-27 | Drexel University | Compositions comprising free standing two dimensional nanocrystals |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105924862A (en) * | 2016-06-07 | 2016-09-07 | 扬州大学 | Method for preparing composite polytetrafluoroethene conductive material |
CN105924862B (en) * | 2016-06-07 | 2017-11-21 | 扬州大学 | A kind of preparation method of compound polytetrafluoroethylene (PTFE) conductive material |
CN106633552A (en) * | 2016-12-18 | 2017-05-10 | 余姚市庆达机械有限公司 | Environment-friendly composite engineering plastic |
CN109021471A (en) * | 2018-08-09 | 2018-12-18 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
CN109021471B (en) * | 2018-08-09 | 2019-10-29 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
CN110358230A (en) * | 2019-08-18 | 2019-10-22 | 赵伟芬 | Anti abrasive PTFE based composites under a kind of dry friction |
CN111073185A (en) * | 2019-12-04 | 2020-04-28 | 沈阳化工大学 | B4Preparation method of C/polytetrafluoroethylene composite material |
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