CN103788551B - A kind of ptfe composite and preparation method thereof - Google Patents

A kind of ptfe composite and preparation method thereof Download PDF

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CN103788551B
CN103788551B CN201410015514.4A CN201410015514A CN103788551B CN 103788551 B CN103788551 B CN 103788551B CN 201410015514 A CN201410015514 A CN 201410015514A CN 103788551 B CN103788551 B CN 103788551B
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ptfe composite
sic
alc
preparation
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CN103788551A (en
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许剑光
严汉兵
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Yangcheng Institute of Technology
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Yangcheng Institute of Technology
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Abstract

The invention provides a kind of ptfe composite, in described ptfe composite, comprise Ti 3siC 2or Ti 3alC 2.The present invention also provides a kind of preparation method of ptfe composite in addition, and the method comprises pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing, then carries out coldmoulding and sintering, obtains ptfe composite.Ptfe composite of the present invention has high-wearing feature, and production technique is simple, and cost is lower, can realize industrialization scale operation.

Description

A kind of ptfe composite and preparation method thereof
Technical field
The invention belongs to field of high polymer material modification, 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 outstanding flame retardant resistance, good electrical insulating property, non-viscosity and physiological compatibility in addition, 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, makes it apply and be restricted.
Multiple method has been adopted to improve the wear resisting property of polytetrafluoroethylmaterial material at present, wherein filling-modified is very convenient and efficient manner, in tetrafluoroethylene, the micron order material such as filled glass fiber, carbon fiber or graphite and the nano material such as filling carbon nano-pipe or Graphene all can improve 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.Such as 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, how to adopt that technique is simple, production cost is lower and the wear resisting property that 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, and this matrix material adopts Ti 3siC 2or Ti 3alC 2as packing material preparation, production technique is simple, and cost is lower, can realize industrialization scale operation.
Another object of the present invention is the preparation method providing a kind of ptfe composite.
For achieving the above object, the invention provides a kind of ptfe composite, containing Ti in described ptfe composite 3siC 2or Ti 3alC 2.
Preferably, the Ti containing 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 μm.
Preferably, the particle diameter of described pure tetrafluoroethylene is 50-100 μm.
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 2mixing, then carries out coldmoulding and sintering, obtains ptfe composite.
Preferably, described preparation method comprises:
Step a: by pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing, obtains mixture;
Step b: by mixture compression moulding under 15-25 DEG C and the preferred 30MPa of 30-60Mpa;
Step c: the mixture obtained by step b sinters in atmosphere and obtains ptfe composite.
Preferably, in described step a, by pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing 30-120min, preferred 30min, obtains mixture.
Preferably, in described step c, the mixture obtained by step b is in atmosphere with 60-100 DEG C/h, preferably the temperature rise rate of 100 DEG C/h is heated to 300 DEG C, again with 50-80 DEG C/h, preferably the temperature rise rate of 60 DEG C/h is heated to 370 DEG C, 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 2ptfe composite is prepared, wherein Ti as packing material 3siC 2and Ti 3alC 2for having the stratiform ternary compound of pottery and metal premium properties concurrently, there is the self-lubricating property of good mechanical property and similar graphite, the experiment proved that, adopt Ti 3siC 2or Ti 3alC 2the ptfe composite prepared 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 Ti of adopting price relatively cheap 3siC 2or Ti 3alC 2prepare ptfe composite as packing material, production technique is simple, and cost is lower, can realize industrialization scale operation.
Embodiment
Referring to specific embodiment, the present invention is described.It will be appreciated by those skilled in the art that these embodiments are only for illustration of the present invention, its scope do not limited the present invention in any way.
Experimental technique in following embodiment, if no special instructions, is ordinary method.Reagent material etc. used in following embodiment, if no special instructions, is commercially available purchase product.
embodiment 1
By the Ti of 5wt% 3siC 2powder (particle diameter is about 30-50 μm) puts into mixer mixing 30min with the pure polytetrafluorethylepowder powder (particle diameter is about 50-100 μm) of 95wt%, subsequently by mixture 15-25 DEG C, compression moulding under 30MPa, then sample is put into sintering oven, 300 DEG C are heated in atmosphere with the temperature rise rate of 100 DEG C/h, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain containing 5wt%Ti 3siC 2ptfe composite.
This embodiment is suitable for the ptfe composite preparing different shape.As a comparison, method same as described above and component proportions preparation is adopted to contain the ptfe composite of 5wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 5wt%Ti 3siC 2ptfe composite and containing the ptfe composite of 5wt% graphite and 45# steel to mill, (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 1/360 of pure polytetrafluoroethylmaterial material; And be 0.158 containing the frictional coefficient of the ptfe composite of 5wt% graphite, its wear rate is 1/50 of pure polytetrafluoroethylmaterial material.
embodiment 2
By the Ti of 5wt% 3alC 2powder (particle diameter is about 30-50 μm) puts into mixer mixing 30min with the pure polytetrafluorethylepowder powder (particle diameter is 50-100 μm) of 95wt%, subsequently by mixture 15-25 DEG C, compression moulding under 30MPa, then sample is put into sintering oven, 300 DEG C are heated in atmosphere with the temperature rise rate of 100 DEG C/h, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain containing 5wt%Ti 3alC 2ptfe composite.
5wt%Ti is contained respectively by above-mentioned 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 1/300 of pure polytetrafluoroethylmaterial material.
embodiment 3
By the Ti of 10wt% 3siC 2powder (particle diameter is about 30-50 μm) puts into mixer mixing 30min with the pure polytetrafluorethylepowder powder (particle diameter is 50-100 μm) of 90wt%, subsequently by mixture 15-25 DEG C, compression moulding under 30MPa, then sample is put into sintering oven, 300 DEG C are heated in atmosphere with the temperature rise rate of 100 DEG C/h, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain containing 10wt%Ti 3siC 2ptfe composite.
As a comparison, method same as described above and component proportions preparation is adopted to contain the ptfe composite of 10wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 10wt%Ti 3siC 2ptfe composite and containing ptfe composite and the 45# steel of 10wt% graphite 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 1/500 of pure polytetrafluoroethylmaterial material; And be 0.156 containing the frictional coefficient of the ptfe composite of 10wt% graphite, its wear rate is 1/120 of pure polytetrafluoroethylmaterial material.
embodiment 4
By the Ti of 1wt% 3siC 2powder (particle diameter is about 30-50 μm) puts into mixer mixing 30min with the pure polytetrafluorethylepowder powder (particle diameter is 50-100 μm) of 99wt%, subsequently by mixture 15-25 DEG C, compression moulding under 30MPa, then sample is put into sintering oven, 300 DEG C are heated in atmosphere with the temperature rise rate of 100 DEG C/h, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain containing 1wt%Ti 3siC 2ptfe composite.
As a comparison, method same as described above and component proportions preparation is adopted to contain the ptfe composite of 1wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 1wt%Ti 3siC 2ptfe composite and containing ptfe composite and the 45# steel of 1wt% graphite 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 1/100 of pure polytetrafluoroethylmaterial material; And be 0.165 containing the frictional coefficient of the ptfe composite of 1wt% graphite, its wear rate is 1/3 of pure polytetrafluoroethylmaterial material.
embodiment 5
By the Ti of 2wt% 3siC 2powder (particle diameter is about 30-50 μm) puts into mixer mixing 30min with the pure polytetrafluorethylepowder powder (particle diameter is 50-100 μm) of 98wt%, subsequently by mixture 15-25 DEG C, compression moulding under 30MPa, then sample is put into sintering oven, 300 DEG C are heated in atmosphere with the temperature rise rate of 100 DEG C/h, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain containing 2wt%Ti 3siC 2ptfe composite.
As a comparison, method same as described above and component proportions preparation is adopted to contain the ptfe composite of 2wt% graphite.Respectively by pure polytetrafluoroethylmaterial material, containing 2wt%Ti 3siC 2ptfe composite and containing ptfe composite and the 45# steel of 2wt% graphite 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 1/260 of pure polytetrafluoroethylmaterial material; And be 0.160 containing the frictional coefficient of the ptfe composite of 2wt% graphite, its wear rate is 1/8 of pure polytetrafluoroethylmaterial material.
The polishing machine test data of the ptfe composite prepared in above-described embodiment 1-5 is as shown in table 1.
The polishing machine test of ptfe composite 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 adopting the frictional coefficient of filling ptfe composite prepared by graphite under the same terms, its wear rate is only the 1/100-1/500 of pure polytetrafluoroethylmaterial material, and the wear rate of the ptfe composite adopting filling graphite to prepare under the same conditions is the 1/3-1/120 of pure polytetrafluoroethylmaterial material, the wear rate of the PTFE anti-wear composite material of containing metal sulfide nano-tube disclosed in patent 200510061587.8 is the 1/113-1/210 of pure polytetrafluoroethylmaterial material in addition, find out thus, relative to existing ptfe composite, ptfe composite prepared by the present invention has preferably wear resisting property.
Specific description of embodiments of the present invention does not above limit the present invention, and those skilled in the art can make various change or distortion according to the present invention, only otherwise depart from spirit of the present invention, all should belong to the scope of claims of the present invention.

Claims (15)

1. a ptfe composite, the Ti containing 1-10wt% in described ptfe composite 3siC 2or Ti 3alC 2.
2. ptfe composite according to claim 1, is characterized in that, the Ti containing 1-5wt% in described ptfe composite 3siC 2or Ti 3alC 2.
3. ptfe composite according to claim 1, 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. the ptfe composite according to any one of claim 1-4, is characterized in that, described Ti 3siC 2and Ti 3alC 2particle diameter be 30-50 μm.
6. the ptfe composite according to any one of claim 3 or 4, is characterized in that, the particle diameter of described pure tetrafluoroethylene is 50-100 μm.
7. the preparation method of the ptfe composite according to any one of claim 1-6, described preparation method comprises: by pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing, then carries out coldmoulding and sintering, obtains 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 2mixing, obtains mixture;
Step b: by mixture compression moulding under 15-25 DEG C and 30-60Mpa;
Step c: the mixture obtained by step b sinters in atmosphere and obtains ptfe composite.
9. preparation method according to claim 8, is characterized in that, in described step b, by mixture compression moulding under 15-25 DEG C and 30MPa.
10. preparation method according to claim 8, is characterized in that, in described step a, by pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing 30-120min, obtains mixture.
11. preparation methods according to claim 10, is characterized in that, in described step a, by described pure tetrafluoroethylene and Ti 3siC 2or Ti 3alC 2mixing 30min, obtains mixture.
12. preparation methods according to Claim 8 according to any one of-11, it is characterized in that, in described step c, the mixture obtained by step b is heated to 300 DEG C with the temperature rise rate of 60-100 DEG C/h in atmosphere, 370 DEG C are heated to again with the temperature rise rate of 50-80 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
13. preparation methods according to claim 12, it is characterized in that, in described step c, the mixture obtained by step b is heated to 300 DEG C with the temperature rise rate of 100 DEG C/h in atmosphere, 370 DEG C are heated to again with the temperature rise rate of 50-80 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
14. preparation methods according to claim 12, it is characterized in that, in described step c, the mixture obtained by step b is heated to 300 DEG C with the temperature rise rate of 60-100 DEG C/h in atmosphere, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
15. preparation methods according to claim 12, it is characterized in that, in described step c, the mixture obtained by step b is heated to 300 DEG C with the temperature rise rate of 100 DEG C/h in atmosphere, 370 DEG C are heated to again with the temperature rise rate of 60 DEG C/h, be incubated 2 hours, then naturally cool to room temperature, obtain ptfe composite.
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CN105924862B (en) * 2016-06-07 2017-11-21 扬州大学 A kind of preparation method of compound polytetrafluoroethylene (PTFE) conductive material
CN106633552B (en) * 2016-12-18 2018-10-02 星威国际家居有限公司 A kind of environmental protection composite engineering plastics
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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WO2012177712A1 (en) * 2011-06-21 2012-12-27 Drexel University Compositions comprising free standing two dimensional nanocrystals
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