CN105199278A - Graphene/ polytetrafluoroethylene composite material and method for preparing vulcanizer friction ring from same - Google Patents
Graphene/ polytetrafluoroethylene composite material and method for preparing vulcanizer friction ring from same Download PDFInfo
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- CN105199278A CN105199278A CN201510704832.6A CN201510704832A CN105199278A CN 105199278 A CN105199278 A CN 105199278A CN 201510704832 A CN201510704832 A CN 201510704832A CN 105199278 A CN105199278 A CN 105199278A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 26
- 239000004810 polytetrafluoroethylene Substances 0.000 title abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 title abstract 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004917 carbon fiber Substances 0.000 claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 238000007306 functionalization reaction Methods 0.000 claims description 12
- 238000009417 prefabrication Methods 0.000 claims description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 6
- 229940045803 cuprous chloride Drugs 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000003837 high-temperature calcination Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 241000446313 Lamella Species 0.000 claims description 4
- 238000010306 acid treatment Methods 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009747 press moulding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000005498 polishing Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract 1
- 238000004132 cross linking Methods 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000002356 single layer Substances 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a graphene/ polytetrafluoroethylene composite material and a method for preparing a vulcanizer friction ring from the same. The composite material is prepared from the following raw materials: functionalized graphene sheet, carbon fiber, copper powder, glass fiber, other functional auxiliary agents and polytetrafluoroethylene powder. The preparation method of the composite material comprises mechanically mixing all of the raw materials with stirring, and then performing molding, high-temperature calcining and the like, so as to prepare the composite material. The friction ring applied to a vulcanizer is prepared by performing mechanical cutting and polishing on the composite material. According to the technical scheme, the crosslinking and friction-reducing performances of graphene are utilized, the lubrication performance of polytetrafluoroethylene is also provided, and the prepared material possesses wear resistance and lubrication performance during concrete usage processes, and helps to improve the concrete service life of the vulcanizer.
Description
Technical field
The invention belongs to the Synthesis and applications technical field of ptfe composite, specifically, relate to a kind of Graphene/ptfe composite and prepared the method for vulcanizer friction ring set by it.
Background technology
Tetrafluoroethylene (Teflon or PTFE), by the macromolecular compound of tetrafluoroethylene through being polymerized, in present industrial application, tetrafluoroethylene has become most important macromolecular material, and it has excellent chemical stability, erosion resistance, stopping property, high lubrication, not viscosity, electrical insulating property and good anti-aging endurance and extremely low frictional coefficient etc.Although tetrafluoroethylene has above-mentioned so many excellent properties, also there are some defects in himself, as wear resisting property is poor, is easily out of shape and the feature such as easily to deform under continuous load during high temperature.In industrial application, normally adopt materials such as adding molybdenumdisulphide, graphite, glass fibre to carry out modification improve its wear resisting property.
Graphene is a kind of SP
2hydridization has cellular carbon material, and the thickness of single-layer graphene only has 0.334nm, is the thinnest known material at present.The specific surface area that Graphene has super large can reach about 2600m
2/ g, so large specific surface area makes graphene film can form good network in the material, and because its laminated structure energy is good and packing material forms overall decussate texture.Graphene has good mechanical property and mechanical property simultaneously, at people (LeeC. such as Lee in 2008, etal.Measurementoftheelasticpropertiesandintrinsicstreng thofmonolayergraphene.Science, 2008,321 (5887): 385-388.) utilize atomic force microscope probe to measure the breaking tenacity of single-layer graphene film and Young's modulus of elasticity result is 130 ± 10GPa and 1.0 ± 0.1TPa respectively, breakdown point (tensile strength) reaches 42 ± 4Nm
1, predict that flawless single-layer graphene has the highest tensile strength simultaneously.In addition, the people such as Lee (LeeC., etal.Elasticandfrictionalpropertiesofgraphene.PhysicaSta tusSolidiB-BasicSolidStatePhysics, 2009, 246 (11-12): 2562-2567.) test breaking tenacity and the Young's modulus of elasticity of bilayer graphene film by the method that atomic force microscope probe is measured, 126GPa and 1.04Tpa respectively, the breaking tenacity of 3 layer graphene films and Young's modulus of elasticity are then 101GPa and 0.98Tpa, certain may exist crystal boundary and defect in the grapheme material of macroscopic view unavoidably, but by the visible Graphene of research above, there is superpower comprehensive mechanical property.
Therefore, Graphene is added in tetrafluoroethylene, effectively can improve wear-resisting, high temperature resistance and other the mechanical property of polytetrafluoroethylmaterial material.
Summary of the invention
The object of the present invention is to provide a kind of Graphene/ptfe composite and prepared the method for vulcanizer friction ring set by it.
The present invention, described Graphene/ptfe composite, is prepared by the raw material of following weight part: functionalization graphene sheet 0.01 ~ 1 part, 0.1 ~ 5 part, carbon fiber, copper powder 0.1 ~ 10 part, the glass fibre of 0 ~ 2 part and other performance aids 0.1 ~ 5 part and business polytetrafluorethylepowder powder 30 ~ 100 parts; Wherein said auxiliary agent is made up of following weight part: cuprous chloride 0.1 ~ 1 part, silane coupling agent 0.1 ~ 1 part, nano zinc oxide powder 0.1 ~ 2 part, 0.1 ~ 1 part, silicon carbide.
The present invention, described functionalization graphene sheet is by the functionalization graphene sheet of graphene film gained after strong acid treatment, concrete grammar is select the existing commerical prod that laboratory is standby by nano-graphene sheet reflation legal system or buy, its lamella is 1 ~ 10 carbon atomic layer thickness, the size of this lamella is 5 ~ 30 μm, then graphene film is processed 5 ~ 10 hours through concentrated nitric acid in 60 ~ 120 DEG C, or press the volume ratio mixing solutions of 1:1 through the vitriol oil and concentrated nitric acid in 60 ~ 120 DEG C of process 5 ~ 10 hours, the functionalization graphene sheet of gained after washing drying again.Graphene film is after strong acid treatment, and its surface has the oxygen-containing functional group such as hydroxyl and carboxyl.
The present invention, the chopped carbon fiber that described carbon fiber can be bought by business, its diameter is 1 ~ 5 μm, and length is 10 ~ 30 μm.
The present invention, the short glass fiber that described glass fibre can be bought by business, its length is 3 ~ 10mm, its separate constituent available or mixing element in use procedure.
The present invention, described copper powder can select the copper powder prepared by laboratory galvanic deposit or the copper powder bought by business, and its particle diameter is 50nm ~ 5 μm, and shape is spherical or sheet, and the mixing of its separate constituent available or different-grain diameter composition point.
The present invention, described cuprous chloride, silane coupling agent (KH-550, KH-560 and KH-570), nano zinc oxide powder and silicon carbide, all can be bought by business and obtain, nano zinc oxide powder also can be prepared by laboratory, and the particle diameter of nano zinc oxide powder is 20nm ~ 1 μm.
The present invention, described tetrafluoroethylene can be bought by business.
The present invention, the described method being prepared vulcanizer friction ring set by matrix material, the technical scheme adopted is for raw material with graphene film (preparation of laboratory reflation or business are bought), the functionalization graphene sheet obtained after strong acid treatment again, and and some other added ingredients and auxiliary agent joined in polytetrafluoroethylpowder powder by mechanical stirring and obtain mixed powder, then mold pressing obtains prefabrication, again prefabrication is prepared Graphene/ptfe composite through high-temperature calcination technique, finally Graphene/the ptfe composite of preparation is used in the method for the friction ring set on vulcanizer through cut mechanically and technique for grinding preparation, concrete preparation process is as follows:
(1) mixture of functional graphene sheet and tetrafluoroethylene: by functionalization graphene sheet, carbon fiber, copper powder, glass fibre and other performance aids and tetrafluoroethylene according to above-mentioned calculated amount, obtain uniform mixed powder after being mixed by mechanical stirring;
(2) preparation of functional graphene sheet/ptfe composite: by the above-mentioned powder mixed through mold pressing, high-temperature calcination, obtain graphene film/ptfe composite;
(3) Graphene/ptfe composite fired is prepared through cut mechanically and technique for grinding the friction ring set be used on vulcanizer.
The present invention, described churned mechanically process first adopts the mode stirring then rapid stirring slowly, and wherein the slow speed stirred is 100 ~ 400rpm, and churning time is 10 ~ 40min, and the speed of rapid stirring is 800 ~ 1500rpm, churning time is 30 ~ 120min.
The present invention, described press moulding mode first suppresses in a mold, and then the technique of the demoulding after constant voltage, and the pressure wherein suppressed is 10 ~ 15Mpa, and constant voltage time is 10 ~ 15min.
The present invention, described high-temperature calcination technique adopts progressively that intensification-constant temperature-heat up-constant temperature-cooling fragmentary works mode again, and wherein: the heat-up rate being raised to 355 ~ 360 DEG C by room temperature is 8 ~ 10 DEG C/min, then constant temperature keeps 30 ~ 70min; The heat-up rate being warmed up to 395 ~ 400 DEG C by 355 ~ 360 DEG C is again 2 ~ 5 DEG C/min, and then constant temperature keeps 1 ~ 15min, finally controls to be cooled to room temperature, obtains graphene film/ptfe composite, wherein, lower the temperature as Temperature fall.
The present invention, due to functionalization graphene sheet and other added ingredients and auxiliary agent are added in tetrafluoroethylene, effectively can improve wear-resisting, high temperature resistance and other the mechanical property of polytetrafluoroethylmaterial material, it makes use of the crosslinked of Graphene and fall mill performance, have the lubricity of tetrafluoroethylene concurrently, Graphene/ptfe composite prepared therefrom, for the production of processing the friction ring set be used on vulcanizer, there is wear-resistant and lubricity, vulcanizer concrete work-ing life can be improved.
Accompanying drawing explanation
The SEM figure of Fig. 1 Graphene;
Fig. 2 tetrafluoroethylene SEM schemes;
Fig. 3 carbon fiber SEM schemes;
Fig. 4 copper powder SEM schemes;
Fig. 5 zinc oxide SEM schemes;
Fig. 6 Graphene/ptfe composite is processed into the photo of vulcanizer ring set.
Embodiment
Explain the present invention further below in conjunction with specific embodiment, but embodiment does not limit in any form to invention.
embodiment 1:
Take the graphene film 0.5g for preparing in laboratory through concentrated nitric acid 120 DEG C of process after 5 hours, through washing drying.It is 150rpm that copper powder 5g, 3mm glass fibre 1g, the cuprous chloride 0.5g of carbon fiber 1.5g, 100nm of then with 1 μm, silane coupling agent (KH-550) 0.2g, nano zinc oxide powder 1g, silicon carbide 0.5g and business polytetrafluorethylepowder powder 50g control rotating speed through machine mixer, its raising speed is obtained the mixed powder mixed after being uniformly mixed 15min to 1000rpm stirring 40min again.Then proceeded in mould by powder and slowly suppress under the pressure of 10Mpa, then constant voltage obtains prefabrication in 10 minutes.Again prefabrication is put into temperature controllable stove by room temperature be elevated to 360 DEG C control heat-up rates be 8 ~ 10 DEG C/min, constant temperature 40min after 360 DEG C, be that 2 DEG C/min is raised to 395 DEG C and constant temperature 10min with heat-up rate again, reduce the temperature to the room temperature demoulding subsequently and obtain graphene film/ptfe composite, the friction ring set used at vulcanizer is obtained again after mechanical workout and polishing, the SEM figure of Fig. 1 Graphene, Fig. 2 tetrafluoroethylene SEM schemes, Fig. 3 carbon fiber SEM schemes, Fig. 4 copper powder SEM schemes, Fig. 5 zinc oxide SEM schemes, Fig. 6 Graphene/ptfe composite is processed into the photo of vulcanizer ring set.
embodiment 2:
Take the graphene film 0.6g for preparing in laboratory through the vitriol oil and concentrated nitric acid (volume ratio 1:1) mixing solutions 60 DEG C process after 10 hours, through washing drying.Glass fibre 1g, the cuprous chloride 0.6g of the carbon fiber 1.4g of then with 5 μm, copper powder 5g, 7mm of 1 μm, silane coupling agent (KH-560) 0.25g, nano zinc oxide powder 1.2g, silicon carbide 0.8g and business polytetrafluorethylepowder powder 50g are 120rpm through machine mixer control rotating speed, its raising speed are obtained the mixed powder mixed after being uniformly mixed 20min to 1200rpm stirring 35min again.Then proceeded in mould by powder and slowly suppress under the pressure of 12Mpa, then constant voltage obtains prefabrication in 8 minutes.Again prefabrication is put into temperature controllable stove by room temperature be elevated to 355 DEG C control heat-up rates be ~ 10 DEG C/min, constant temperature 45min after 355 DEG C, be that 2 DEG C/min is raised to 400 DEG C and constant temperature 8min with heat-up rate again, reduce the temperature to the room temperature demoulding subsequently and obtain graphene film/ptfe composite, then obtain the friction ring set in vulcanizer use after mechanical workout and polishing.By the friction ring set that with the addition of Graphene of preparation with not have the friction ring of Graphene of interpolation to be enclosed within contrast test on two identical vulcanizers of working conditions, result shows that the work-ing life of the friction ring set adding Graphene is 10 months, and the work-ing life of the friction ring set of the Graphene do not added is 4 months.
embodiment 3:
Take business buy graphene film 0.8g through concentrated nitric acid 120 DEG C process 5 hours after, through washing drying.The carbon fiber 1.6g(mass ratio 2:1 of then with 1 μm and 5 μm), the copper powder 6g(mass ratio 1:1 of 50nm and 1 μm), the glass fibre 1.1g(mass ratio 2:1 of 3mm and 7mm), to control rotating speed through machine mixer be 200rpm for cuprous chloride 0.5g, silane coupling agent (KH-570) 0.2g, nano zinc oxide powder 1g, silicon carbide 0.5g and business polytetrafluorethylepowder powder 55g, its raising speed obtained the mixed powder mixed after being uniformly mixed 10min to 1500rpm stirring 20min again.Then proceeded in mould by powder and slowly suppress under the pressure of 15Mpa, then constant voltage obtains prefabrication in 6 minutes.Again prefabrication is put into temperature controllable stove by room temperature be elevated to 360 DEG C control heat-up rates be ~ 10 DEG C/min, constant temperature 40min after 360 DEG C, be that 2 DEG C/min is raised to 400 DEG C and constant temperature 8min with heat-up rate again, reduce the temperature to the room temperature demoulding subsequently and obtain graphene film/ptfe composite, then obtain the friction ring set in vulcanizer use after mechanical workout and polishing.
The concentration of the vitriol oil described in specification sheets is 98%, and the concentration of concentrated nitric acid is 60%, is mass ratio, commercially available prod.
Claims (9)
1. Graphene/ptfe composite, is prepared by the raw material of following weight part: functionalization graphene sheet 0.01 ~ 1 part, 0.1 ~ 5 part, carbon fiber, copper powder 0.1 ~ 10 part, the glass fibre of 0 ~ 2 part and other performance aids 0.1 ~ 5 part and business polytetrafluorethylepowder powder 30 ~ 100 parts; Wherein said auxiliary agent is made up of following weight part: cuprous chloride 0.1 ~ 1 part, silane coupling agent 0.1 ~ 1 part, nano zinc oxide powder 0.1 ~ 2 part, 0.1 ~ 1 part, silicon carbide.
2. matrix material according to claim 1, it is characterized in that: described functionalization graphene sheet is the functionalization graphene sheet of graphene film gained after strong acid treatment, concrete grammar is the graphene film selected, its lamella is 1 ~ 10 carbon atomic layer thickness, the size of this lamella is 5 ~ 30 μm, then graphene film is processed 5 ~ 10 hours through concentrated nitric acid in 60 ~ 120 DEG C, or press the volume ratio mixing solutions of 1:1 through the vitriol oil and concentrated nitric acid in 60 ~ 120 DEG C of process 5 ~ 10 hours, the functionalization graphene sheet of gained after washing drying again, wherein, the concentration of the vitriol oil is 98%, the concentration of concentrated nitric acid is 60%.
3. matrix material according to claim 1, is characterized in that: described carbon fiber is chopped carbon fiber, and its diameter is 1 ~ 5 μm, and length is 10 ~ 30 μm.
4. matrix material according to claim 1, is characterized in that: described glass fibre is short glass fiber, and its length is 3 ~ 10mm, its separate constituent available or mixing element in use procedure.
5. matrix material according to claim 1, is characterized in that: described copper powder, and its particle diameter is 50nm ~ 5 μm, and shape is spherical or sheet, and the mixing of its separate constituent available or different-grain diameter composition point.
6. prepared the method for vulcanizer friction ring set by matrix material described in claim 1 or 2 for one kind, it is characterized in that: by described functionalization graphene sheet, carbon fiber, copper powder, glass fibre and other performance aids and tetrafluoroethylene are according to calculated amount, uniform mixed powder is obtained after being mixed by mechanical stirring, then mold pressing obtains prefabrication, again prefabrication is prepared Graphene/ptfe composite through high-temperature calcination technique, finally Graphene/the ptfe composite of preparation is prepared through cut mechanically and technique for grinding the friction ring set be used on vulcanizer.
7. method according to claim 6, it is characterized in that: described churned mechanically process first adopts the mode stirring then rapid stirring slowly, wherein the slow speed stirred is 100 ~ 400rpm, churning time is 10 ~ 40min, and the speed of rapid stirring is 800 ~ 1500rpm, churning time is 30 ~ 120min.
8. method according to claim 6, is characterized in that: described press moulding mode, is first suppress in a mold, and then the technique of the demoulding after constant voltage, and the pressure wherein suppressed is 10 ~ 15Mpa, and constant voltage time is 10 ~ 15min.
9. method according to claim 6, it is characterized in that: described high-temperature calcination technique adopts progressively that intensification-constant temperature-heat up-constant temperature-cooling fragmentary works mode again, wherein: the heat-up rate being raised to 355 ~ 360 DEG C by room temperature is 8 ~ 10 DEG C/min, then constant temperature keeps 30 ~ 70min; The heat-up rate being warmed up to 395 ~ 400 DEG C by 355 ~ 360 DEG C is again 2 ~ 5 DEG C/min, and then constant temperature keeps 1 ~ 15min, finally controls to be cooled to room temperature, obtains graphene film/ptfe composite, wherein, lower the temperature as Temperature fall.
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Cited By (10)
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| CN106380762A (en) * | 2016-08-31 | 2017-02-08 | 温州赵氟隆有限公司 | Graphene and polytetrafluoroethylene composite material conductive belt and production method thereof |
| CN107043508A (en) * | 2017-06-05 | 2017-08-15 | 巨轮智能装备股份有限公司 | A kind of preparation method of nitrogen-doped graphene/ptfe composite |
| CN107189290A (en) * | 2017-07-11 | 2017-09-22 | 济南大学 | Filled polytetrafluoroethylene plate and preparation method thereof |
| CN108236738A (en) * | 2016-12-26 | 2018-07-03 | 苏州东泉生物科技有限公司 | A kind of bion composite material oesophagus sticking patch with radio therapy sensitization |
| CN108236741A (en) * | 2016-12-26 | 2018-07-03 | 苏州东泉生物科技有限公司 | A kind of bion composite material oesophagus sticking patch |
| CN108236740A (en) * | 2016-12-26 | 2018-07-03 | 苏州东泉生物科技有限公司 | A kind of composite material oesophagus sticking patch |
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| CN108236738A (en) * | 2016-12-26 | 2018-07-03 | 苏州东泉生物科技有限公司 | A kind of bion composite material oesophagus sticking patch with radio therapy sensitization |
| CN108236741A (en) * | 2016-12-26 | 2018-07-03 | 苏州东泉生物科技有限公司 | A kind of bion composite material oesophagus sticking patch |
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