CN106631083A - Method for preparing chopped carbon fiber reinforced carbon/carbon composite materials for pantograph slide plates - Google Patents
Method for preparing chopped carbon fiber reinforced carbon/carbon composite materials for pantograph slide plates Download PDFInfo
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- CN106631083A CN106631083A CN201610868451.6A CN201610868451A CN106631083A CN 106631083 A CN106631083 A CN 106631083A CN 201610868451 A CN201610868451 A CN 201610868451A CN 106631083 A CN106631083 A CN 106631083A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/20—Details of contact bow
- B60L5/205—Details of contact bow with carbon contact members
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention discloses a method for preparing chopped carbon fiber reinforced carbon/carbon composite materials for pantograph slide plates. The method includes placing chopped carbon fibers, mesophase asphalt powder and dispersing agents in water to obtain slurry; pouring the slurry into a metal container and carrying out freeze drying on the slurry in freeze drying equipment to obtain carbon fiber reinforcement; carrying out compression molding on the prepared carbon fiber reinforcement to obtain blanks; carrying out carbonization treatment on the prepared blanks; impregnating materials obtained after carbonization treatment is carried out in mesophase asphalt; carrying out carbonization treatment on materials obtained after materials are impregnated in the mesophase asphalt; repeatedly carrying out impregnation-carbonization by 4-6 times; carrying out graphitization treatment to obtain the target materials. The method has the advantages that the chopped carbon fiber reinforced carbon/carbon composite materials prepared by the aid of the method are excellent in electric conductivity and impact resistance, and the shortcoming of poor electric conductivity and impact resistance of existing pantograph slide plates made of carbon/carbon composite materials prepared in the prior art can be overcome.
Description
Technical field
The invention belongs to the preparation field of pantograph pan, and in particular to a kind of pantograph pan is strengthened with chopped carbon fiber
The preparation method of carbon/carbon compound material.
Background technology
By in September, 2016, China railways do business course more than 120,000 kilometers, and wherein high-speed railway is public more than 20,000
In, country is realized in advance《Chinese long-term railway network planning》Target.With the speed of the train gone at express speed on high-speed railway
Raising, correspondingly also bring numerous matter of science and technologys.The pantograph pan of bullet train slides with contact net lines and connects
Touch, the load current of 500A or so is transferred into train, increasingly harsher requirement is proposed to sliding material performance.At present by electricity
The conventional material of bow slide plate mainly has：Powder shaped charge liner, carbon slipper, metal-impregnated carbon slide.But in above-mentioned three kinds of slide plates
Find during use：The serious wear of powder shaped charge liner contact line conducting wire, arc resistant ability are weak；The mechanical strength of carbon slipper
Low, poor impact resistance, meets wire hard spot and easily causes slide plate fracture or fall block；Metal-impregnated carbon slide combines powder metallurgy cunning
Also the shortcoming of powder shaped charge liner and carbon slipper is remained while the advantage of plate and carbon slipper, for example：The shock resistance of carbon slipper
Ability is low, mechanical strength is relatively low, easily occurs fracture in operation and falls block；Powder shaped charge liner is big to the abrasion of wire,
Easily stick together with wire in operation.
To overcome the shortcoming of metal-impregnated carbon slide, the performance of sliding material is improved, reduces cost, researcher is increased to fibre
Dimension strengthens the research of composite slide plate, such as patent of invention（Application number：97106646.9）" use for electric locomotive carbon ~ carbon is multiple
Condensation material pantograph pan " discloses one kind and adopts to plate material based on copper powders, using short carbon fiber as reinforcing agent, with heat
Thermosetting resin is used as binding agent, the method for receiving electrician's slide plate using the preparation of hygrometric state or dry state mixed-forming.Using the method,
（1）Need to carbon dust（Graphite powder or coke powder）Copper plating treatment is carried out, equipment investment, and carbon dust copper coating is increased
It is uneven, it is unfavorable for improving the electrical conduction performance of sliding material；（2）The preparation method highest only 180 DEG C to blank at
Reason, treatment temperature is low, it is impossible to give full play to the wear-resisting and good mechanical performance of material with carbon element slide plate；（3）The method production cycle
Long, relatively costly, mass production ability is poor.Patent of invention（Application number：201310308748.3 ）" one kind is at a high speed
The preparation method of train pantograph slide plate carbon/carbon ~ graphite composite material " discloses a kind of composite slide plate preparation method.
The method is comprised the following steps that：Prepare graphite suspension and prepare graphite precast body pair to impregnated graphite suspension in carbon felt
Repeatedly impregnation carbonization obtains carbon/carbon ~ graphite composite material to graphite precast body.Graphite granule in the method, in suspension
Or graphite powder is difficult to be impregnated into carbon felt, and the graphite being impregnated into there is also gradient distribution, cause the uneven of its distribution, so that
Slide plate poor mechanical property.
The content of the invention
The poorly conductive of the carbon/carbon compound material pantograph pan to overcome prior art to prepare, impact resistance are weak
Defect, the purpose of the present invention aims to provide a kind of pantograph pan chopped carbon fiber strengthens the preparation side of carbon/carbon compound material
Method, carbon/carbon compound material electric conductivity prepared by the method is excellent, shock resistance is good.
For achieving the above object, the technical scheme that the present invention takes is as follows：
A kind of pantograph pan strengthens the preparation method of carbon/carbon compound material with chopped carbon fiber, and step is as follows：
（1）Chopped carbon fiber, mesophase pitch powder and dispersant are put into water and make slip；Wherein, the chopped carbon fiber
Account for 20 ~ 70wt% of both chopped carbon fiber and mesophase pitch powder gross mass, both chopped carbon fiber and mesophase pitch powder
Gross mass accounts for the 40 ~ 60% of water quality, and the dispersant accounts for 0.5 ~ 2.0wt% of water quality；
（2）By step（1）The slip of preparation is poured into canister, is put into freeze-drying in freeze drying equipment, carbon is obtained fine
Dimension reinforcement；
（3）To step（2）The carbon fiber reinforcement of preparation carries out compression molding, and base substrate is obtained；
（4）To step（3）The base substrate of preparation carries out carbonization treatment；
（5）Mesophase pitch powder is taken, after thawing, then by step（4）The mesophase drip of resulting materials dipping liquid phase after carbonization treatment
It is blue or green；
（6）By step（5）Dipping mesophase pitch after resulting materials with step（4）Carry out at carbonization under identical treatment conditions
Reason；
（7）Repeat step（5）With（6）4 ~ 6 times；
（8）Graphitization processing, obtains final product target material.
Most preferably, the chopped carbon fiber accounts for the 30wt% of both chopped carbon fiber and mesophase pitch powder gross mass, is chopped
Both carbon fiber and mesophase pitch powder gross mass accounts for the 50wt% of water quality, and the dispersant accounts for the 1.5wt% of water quality.
Further, step（2）Specially：By step（1）The slip of preparation is poured into canister, is put into freeze-drying
In machine, -50 ~ -30 DEG C are refrigerated under vacuum, are incubated 20 ~ 40 min；- 20 ~ -10 DEG C are warming up to, insulation 20 ~ 40
min；- 10 ~ -5 DEG C are continuously heating to, 20 ~ 40 min are incubated；- 1 ~ 0 DEG C is continuously heating to, is incubated to being completely dried；Let out
Vacuum, takes out, and obtains final product carbon fiber reinforcement；Step（2）During the entire process of, heated up with the heating rate of 2 ~ 5 DEG C/h.This
Bright freeze-drying takes substep to heat up and control heating rate, can preferably control the speed of moisture evaporation, reaches control carbon fine
The effect of dimension reinforcement mesopore, at the same can realize carbon fiber along xy and z to being uniformly distributed, so as to obtain the preferable mesh of performance
Mark material.
Preferably, the chopped carbon fiber is the mesophase pitch-based carbon fibers that are chopped, and its length is 1 ~ 50 mm.
Preferably, step（1）With（5）In, the granularity of the mesophase pitch powder is 100 ~ 500 mesh.
Preferably, the dispersant is polyacrylamide, Sodium Polyacrylate or hydroxyethyl cellulose.
Preferably, step（3）In, compression molding temperature be 200 ~ 300 DEG C, briquetting pressure be 5 ~ 30 MPa, pressurize
The h of time 2 ~ 6.
Preferably, step（4）Specially：By step（3）The base substrate of preparation is positioned in carbide furnace, with 15 ~ 25 DEG C/h
Heating rate be warming up to 300 ~ 400 DEG C；It is continuously heating to 600 ~ 700 DEG C with the heating rate of 2 ~ 5 DEG C/h again；Again with 5
The heating rate of ~ 15 DEG C/h is continuously heating to 900 ~ 1000 DEG C, is incubated 1 ~ 3h；Cooling.
Preferably, step（5）In, dipping temperature is 300 ~ 400 DEG C, and impregnation pressure is 1 ~ 15MPa, and the dwell time is
2 ~ 6 h。
Preferably, step（8）In, graphitization processing temperature is 2100 ~ 2700 DEG C, and temperature retention time is 2 ~ 6 h.
Beneficial effect：
1st, it is of the invention using intermediate phase pitch-based chopped carbon fiber as reinforcement, using mesophase pitch powder as bonding agent and dipping
Agent, using freeze-drying, compression molding, pressure impregnation-carbonization method prepared pantograph chopped carbon fiber strengthen carbon/
Carbon composite, poorly conductive, the impact resistance for overcoming the carbon/carbon compound material pantograph pan of prior art preparation is weak
Defect；
2nd, according to the difference of pantograph pan structure, can be with different shape and the canister of size, with knot during freeze-drying
The controllability of structure；
3rd, the chopped carbon fiber enhancing carbon/carbon compound material that prepared by the present invention has good electric conductivity, shock resistance good, can
For high-speed train pantograph slide plate and brush.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described further.It should be understood that following examples are merely to illustrate
The present invention is not for restriction the scope of the present invention.
Embodiment 1
A kind of pantograph pan strengthens the preparation method of carbon/carbon compound material with chopped carbon fiber, and step is as follows：
（1）By chopped mesophase pitch-based carbon fibers（Length is 1mm）, mesophase pitch powder（The mesh of granularity 100）Put with dispersant
Enter and make in water slip；Wherein, both chopped carbon fiber and mesophase pitch powder account for the 50wt% of water quality, and the chopped carbon is fine
The mass ratio of peacekeeping mesophase pitch powder is 7：3, the dispersant accounts for the 1.5wt% of water quality；The dispersant is polyacrylamide
Amine；
（2）By step（1）The slip of preparation is poured into canister, is put into freeze drier, and under vacuum -30 DEG C are refrigerated to,
Insulation 30min；- 20 DEG C are continuously heating to the heating rate of 5 DEG C/h, 30min is incubated；Continued with the heating rate of 5 DEG C/h again
- 5 DEG C are warming up to, 30min is incubated；Again -1 DEG C is continuously heating to the heating rate of 5 DEG C/h, is incubated to being completely dried；Let out vacuum,
Take out, obtain final product carbon fiber along xy and z to equally distributed carbon fiber reinforcement；
（3）To step（2）The carbon fiber reinforcement of preparation carries out compression molding, and compression molding temperature is 200 DEG C, and briquetting pressure is
10MPa, dwell time 2h, are obtained base substrate；
（4）Carbonization treatment：By step（3）The base substrate of preparation is positioned in carbide furnace, and with the heating rate of 20 DEG C/h 350 are warming up to
℃；It is continuously heating to 650 DEG C with the heating rate of 5 DEG C/h again；Again 950 DEG C are continuously heating to the heating rate of 10 DEG C/h, are protected
2 h of temperature；Power-off is cooled to room temperature；
（5）Take mesophase pitch powder（The mesh of granularity 100）In being put into high-pressure impregnation tank, heat up after melting, by step（4）Carbonization treatment
Afterwards resulting materials are put into high-pressure impregnation tank, impregnate liquid phase mesophase pitch, and dipping temperature is 300 DEG C, and impregnation pressure is 5MPa,
Dwell time is 2h；
（6）By step（5）Dipping mesophase pitch after resulting materials with step（4）Carry out at carbonization under identical treatment conditions
Reason；
（7）Repeat step（5）With（6）5 times；
（8）Graphitization processing, graphitization processing temperature is 2500 DEG C, and temperature retention time is 2h, obtains final product target material.
Strengthen carbon/carbon compound material performance to obtained chopped carbon fiber to test：Density of material is 1.78g/cm3,
Impact flexibility 0.51J/cm2, resistivity is 6.6 μ Ω m.
Embodiment 2
A kind of pantograph pan strengthens the preparation method of carbon/carbon compound material with chopped carbon fiber, and step is as follows：
（1）By chopped mesophase pitch-based carbon fibers（Length is 25mm）, mesophase pitch powder（The mesh of granularity 250）Put with dispersant
Enter and make in water slip；Wherein, both chopped carbon fiber and mesophase pitch powder account for the 50wt% of water quality, and the chopped carbon is fine
The mass ratio of peacekeeping mesophase pitch powder is 5：5, the dispersant accounts for the 1.5wt% of water quality；The dispersant is polyacrylic acid
Sodium；
（2）By step（1）The slip of preparation is poured into canister, is put into freeze drier, and under vacuum -40 DEG C are refrigerated to,
Insulation 30min；- 20 DEG C are continuously heating to the heating rate of 5 DEG C/h, 30min is incubated；Continued with the heating rate of 5 DEG C/h again
- 5 DEG C are warming up to, 30min is incubated；Again -1 DEG C is continuously heating to the heating rate of 5 DEG C/h, is incubated to being completely dried；Let out vacuum,
Take out, obtain final product carbon fiber along xy and z to equally distributed carbon fiber reinforcement；
（3）To step（2）The carbon fiber reinforcement of preparation carries out compression molding, and compression molding temperature is 250 DEG C, and briquetting pressure is
20MPa, dwell time 2h, are obtained base substrate；
（4）Carbonization treatment：By step（3）The base substrate of preparation is positioned in carbide furnace, and with the heating rate of 20 DEG C/h 350 are warming up to
℃；It is continuously heating to 650 DEG C with the heating rate of 5 DEG C/h again；Again 950 DEG C are continuously heating to the heating rate of 10 DEG C/h, are protected
2 h of temperature；Power-off is cooled to room temperature；
（5）Take mesophase pitch powder（The mesh of granularity 250）In being put into high-pressure impregnation tank, heat up after melting, by step（4）Carbonization treatment
Afterwards resulting materials are put into high-pressure impregnation tank, impregnate liquid phase mesophase pitch, and dipping temperature is 350 DEG C, and impregnation pressure is
10MPa, the dwell time is 2h；
（6）By step（5）Dipping mesophase pitch after resulting materials with step（4）Carry out at carbonization under identical treatment conditions
Reason；
（7）Repeat step（5）With（6）5 times；
（8）Graphitization processing, graphitization processing temperature is 2500 DEG C, and temperature retention time is 2h, obtains final product target material.
Strengthen carbon/carbon compound material performance to obtained chopped carbon fiber to test：Density of material is 1.81g/cm3,
Impact flexibility 0.52J/cm2, resistivity is 5.2 μ Ω m.
Embodiment 3
A kind of pantograph pan strengthens the preparation method of carbon/carbon compound material with chopped carbon fiber, and step is as follows：
（1）By chopped mesophase pitch-based carbon fibers（Length is 50mm）, mesophase pitch powder（The mesh of granularity 500）Put with dispersant
Enter and make in water slip；Wherein, both chopped carbon fiber and mesophase pitch powder account for the 50wt% of water quality, and the chopped carbon is fine
The mass ratio of peacekeeping mesophase pitch powder is 3：7, the dispersant accounts for the 1.5wt% of water quality；The dispersant is that ethoxy is fine
Dimension element；
（2）By step（1）The slip of preparation is poured into canister, is put into freeze drier, and under vacuum -50 DEG C are refrigerated to,
Insulation 30min；- 20 DEG C are continuously heating to the heating rate of 5 DEG C/h, 30min is incubated；Continued with the heating rate of 5 DEG C/h again
- 5 DEG C are warming up to, 30min is incubated；Again -1 DEG C is continuously heating to the heating rate of 5 DEG C/h, is incubated to being completely dried；Let out vacuum,
Take out, obtain final product carbon fiber along xy and z to equally distributed carbon fiber reinforcement；
（3）To step（2）The carbon fiber reinforcement of preparation carries out compression molding, and compression molding temperature is 300 DEG C, and briquetting pressure is
30MPa, dwell time 2h, are obtained base substrate；
（4）Carbonization treatment：By step（3）The base substrate of preparation is positioned in carbide furnace, and with the heating rate of 20 DEG C/h 350 are warming up to
℃；It is continuously heating to 650 DEG C with the heating rate of 5 DEG C/h again；Again 950 DEG C are continuously heating to the heating rate of 10 DEG C/h, are protected
2 h of temperature；Power-off is cooled to room temperature；
（5）Take mesophase pitch powder（The mesh of granularity 500）In being put into high-pressure impregnation tank, heat up after melting, by step（4）Carbonization treatment
Afterwards resulting materials are put into high-pressure impregnation tank, impregnate liquid phase mesophase pitch, and dipping temperature is 375 DEG C, and impregnation pressure is
15MPa, the dwell time is 2h；
（6）By step（5）Dipping mesophase pitch after resulting materials with step（4）Carry out at carbonization under identical treatment conditions
Reason；
（7）Repeat step（5）With（6）5 times；
（8）Graphitization processing, graphitization processing temperature is 2500 DEG C, and temperature retention time is 2h, obtains final product target material.
Strengthen carbon/carbon compound material performance to obtained chopped carbon fiber to test：Density of material is 1.86g/cm3,
Impact flexibility 0.57J/cm2, resistivity is 3.5 μ Ω m.
Reference examples 3 '
It is with the difference of embodiment 3：Step（2）Single step is taken to heat up during freeze-drying, its detailed process is：Will step
Suddenly（1）The slip of preparation is poured into canister, is put into freeze drier, and -50 DEG C are refrigerated under vacuum, is incubated 30min；With
The heating rate of 5 DEG C/h is directly warming up to -1 DEG C, is incubated to being completely dried；Vacuum is let out, is taken out, obtain final product carbon fiber reinforcement.
Strengthen carbon/carbon compound material performance to obtained chopped carbon fiber to test：Density of material is 1.76g/cm3,
Impact flexibility 0.37J/cm2, resistivity is 5.2 μ Ω m.
Conclusion：
1st, by above-described embodiment 1 ~ 3：Carbon/carbon is strengthened according to chopped carbon fiber prepared by method provided by the present invention
The density of composite, impact flexibility, electric conductivity are satisfied by the requirement as High Speed Railway Trains pantograph pan, only will need to make
Standby chopped carbon fiber strengthens acquisition pantograph by carbon/carbon compound material is processed according to the mechanical drawing of pantograph pan
Slide plate.In above three embodiment, particularly the mass ratio of chopped carbon fiber and mesophase pitch powder is 3:When 7, density and
Shock resistance is best, resistivity is minimum；
2nd, by embodiment 3 and reference examples 3 '：Under conditions of other conditions are identical, freeze-drying is by the present invention point
Chopped carbon fiber prepared by step intensification mechanism strengthens density, impact flexibility, the electric conductivity of carbon/carbon compound material and is significantly better than one
Step formula intensification mechanism.This is because heating up using multiple step format, and the speed of the controllable water volatilization of heating rate is controlled, reach control
The effect of carbon fiber reinforcement mesopore, at the same realize carbon fiber along xy and z to being uniformly distributed, the performance of the material of acquisition is more
It is good.
Embodiment described above, only presently preferred embodiments of the present invention, are not limited to the scope of the present invention, the present invention
Above-described embodiment can also make a variety of changes.I.e. every claims and description institute according to the present patent application
The simple of work, equivalence changes and modification, fall within the claims of patent of the present invention.The not detailed description of the present invention
It is routine techniques content.
Claims (10)
1. a kind of pantograph pan strengthens the preparation method of carbon/carbon compound material with chopped carbon fiber, it is characterised in that step is such as
Under：
（1）Chopped carbon fiber, mesophase pitch powder and dispersant are put into water and make slip；Wherein, the chopped carbon fiber
Account for 20 ~ 70wt% of both chopped carbon fiber and mesophase pitch powder gross mass, both chopped carbon fiber and mesophase pitch powder
Gross mass accounts for 40 ~ 60 wt% of water quality, and the dispersant accounts for 0.5 ~ 2.0wt% of water quality；
（2）By step（1）The slip of preparation is poured into canister, is put into freeze-drying in freeze drying equipment, carbon is obtained fine
Dimension reinforcement；
（3）To step（2）The carbon fiber reinforcement of preparation carries out compression molding, and base substrate is obtained；
（4）To step（3）The base substrate of preparation carries out carbonization treatment；
（5）Mesophase pitch powder is taken, after thawing, then by step（4）The mesophase drip of resulting materials dipping liquid phase after carbonization treatment
It is blue or green；
（6）By step（5）Dipping mesophase pitch after resulting materials with step（4）Carry out at carbonization under identical treatment conditions
Reason；
（7）Repeat step（5）With（6）4 ~ 6 times；
（8）Graphitization processing, obtains final product target material.
2. preparation method according to claim 1, it is characterised in that：The chopped carbon fiber accounts for chopped carbon fiber and centre
The 30wt% of both asphalt phase powder gross masses, both chopped carbon fiber and mesophase pitch powder gross mass accounts for the 50wt% of water quality,
The dispersant accounts for the 1.5wt% of water quality.
3. preparation method according to claim 1, it is characterised in that step（2）Specially：By step（1）The material of preparation
Slurry is poured into canister, is put into freeze drier, and -50 ~ -30 DEG C are refrigerated under vacuum, is incubated 20 ~ 40 min；Rise
Temperature is incubated 20 ~ 40 min to -20 ~ -10 DEG C；- 10 ~ -5 DEG C are continuously heating to, 20 ~ 40 min are incubated；Continue to heat up
To -1 ~ 0 DEG C, it is incubated to being completely dried；Vacuum is let out, is taken out, obtain final product carbon fiber reinforcement.
4. preparation method according to claim 1, it is characterised in that：The chopped carbon fiber is the intermediate phase pitch-based that is chopped
Carbon fiber, its length is 1 ~ 50 mm.
5. preparation method according to claim 1, it is characterised in that：Step（1）With（5）In, the mesophase pitch powder
Granularity be 100 ~ 500 mesh.
6. preparation method according to claim 1, it is characterised in that：The dispersant is polyacrylamide, polyacrylic acid
Sodium or hydroxyethyl cellulose.
7. preparation method according to claim 1, it is characterised in that：Step（3）In, compression molding temperature be 200 ~
300 DEG C, briquetting pressure is 5 ~ 30 MPa, the h of dwell time 2 ~ 6.
8. preparation method according to claim 1, it is characterised in that step（4）Specially：By step（3）The base of preparation
Body is positioned in carbide furnace, and with the heating rate of 15 ~ 25 DEG C/h 300 ~ 400 DEG C are warming up to；Again with the intensification of 2 ~ 5 DEG C/h
Speed is continuously heating to 600 ~ 700 DEG C；Again 900 ~ 1000 DEG C are continuously heating to the heating rate of 5 ~ 15 DEG C/h, insulation 1
~ 3h；Cooling.
9. preparation method according to claim 1, it is characterised in that：Step（5）In, dipping temperature is 300 ~ 400 DEG C,
Impregnation pressure is 1 ~ 15MPa, and the dwell time is 2 ~ 6 h.
10. preparation method according to claim 1, it is characterised in that：Step（8）In, graphitization processing temperature is 2100
~ 2700 DEG C, temperature retention time is 2 ~ 6 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610868451.6A CN106631083B (en) | 2016-09-30 | 2016-09-30 | A kind of pantograph pan enhances the preparation method of carbon/carbon compound material with chopped carbon fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610868451.6A CN106631083B (en) | 2016-09-30 | 2016-09-30 | A kind of pantograph pan enhances the preparation method of carbon/carbon compound material with chopped carbon fiber |
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| Publication Number | Publication Date |
|---|---|
| CN106631083A true CN106631083A (en) | 2017-05-10 |
| CN106631083B CN106631083B (en) | 2019-09-06 |
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Cited By (6)
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| CN107916466A (en) * | 2017-11-28 | 2018-04-17 | 株洲科威铁路配件有限公司 | Carbon fibre material and preparation method and application, the method for preparation pantograph sliding block |
| CN110436950A (en) * | 2019-08-15 | 2019-11-12 | 合肥工业大学 | A kind of preparation method of the compound Material for Pantograph Slide of carbon/carbon of high component carbon fiber |
| CN111675547A (en) * | 2020-07-07 | 2020-09-18 | 湖南东映碳材料科技有限公司 | Quasi-isotropic high-thermal-conductivity C/C composite material and preparation method thereof |
| CN113584940A (en) * | 2021-06-24 | 2021-11-02 | 浙江超探碳纤维科技有限公司 | Preparation method of carbon fiber paper |
| CN114039256A (en) * | 2021-12-23 | 2022-02-11 | 捷和电机制品(深圳)有限公司 | Asphalt-based carbon fiber reinforced copper-based graphite motor carbon brush and preparation method thereof |
| CN115894062A (en) * | 2022-12-26 | 2023-04-04 | 内蒙古航天红岗机械有限公司 | Low-cost carbon/graphite throat lining material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107916466A (en) * | 2017-11-28 | 2018-04-17 | 株洲科威铁路配件有限公司 | Carbon fibre material and preparation method and application, the method for preparation pantograph sliding block |
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| CN114039256A (en) * | 2021-12-23 | 2022-02-11 | 捷和电机制品(深圳)有限公司 | Asphalt-based carbon fiber reinforced copper-based graphite motor carbon brush and preparation method thereof |
| CN114039256B (en) * | 2021-12-23 | 2024-01-09 | 捷和电机制品(深圳)有限公司 | Asphalt-based carbon fiber reinforced copper-based graphite motor carbon brush and preparation method thereof |
| CN115894062A (en) * | 2022-12-26 | 2023-04-04 | 内蒙古航天红岗机械有限公司 | Low-cost carbon/graphite throat lining material and preparation method thereof |
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