CN105235529A - Preparation method for pantograph slide plate made of graphene-copper modified carbon/carbon composite material - Google Patents
Preparation method for pantograph slide plate made of graphene-copper modified carbon/carbon composite material Download PDFInfo
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Abstract
The invention discloses a preparation method for a pantograph slide plate made of a graphene-copper modified carbon/carbon composite material. The preparation method comprises the following steps: conducting acid pickling on a piece of integral carbon fiber needled felt to remove a colloid on the surface of the felt, and conducting vacuum drying on the felt without the colloid; soaking the treated felt into a graphene solution of a certain concentration, and taking out the soaked felt for draining and drying; soaking the obtained felt-graphene perform into a copper-ammonia complex solution of a certain concentration; putting the felt-graphene perform introduced with copper into a chemical vapor deposition furnace for carbon deposition and pyrolysis, so as to obtain a low-density carbon/carbon composite material; then, carrying out medium temperature coal-tar pitch circulating impregnation-carbonization to obtain the high-density graphene-copper modified carbon/carbon composite material; and processing the obtained graphene-copper modified carbon/carbon composite material according to drawings to obtain the high-quality pantograph slide plate. According to the preparation method provided by the invention, a graphene film is introduced to the surface of a short cut carbon fiber, so as to improve the conductivity at a fiber/matrix interface of the graphene-copper modified carbon/carbon composite material, and relatively good mechanical properties are achieved; and meanwhile, copper is introduced to the surface of the graphene film, so as to further lower the resistivity of the graphene-copper modified carbon/carbon composite material.
Description
technical field:
The present invention relates to a kind of preparation method of carbon/carbon composite pantograph pan, the preparation method of particularly a kind of Graphene-copper modification carbon/carbon composite pantograph pan.
background technology:
The electrification of railway and high speed have become the trend of world's railway development.Along with the development of national economy and the aggravation of communication and transport market competition, raising electric locomotive running velocity has become an important topic urgently to be resolved hurrily, and pantograph pan is the soul parts of electric locomotive, it is the important sliding collecting element that electric locomotive obtains power resources.Slide plate in the electric locomotive of high-speed cruising was once lose efficacy, and seriously will jeopardize traffic safety, therefore the quality of slide plate quality has very important impact to locomotive.Good pantograph pan need possess following characteristic: the mechanical strength that (1) is enough; (2) little electrical resistivity and contact resistance; (3) good anti-attrition and self lubricity; (4) certain resistance to abrasion; (5) good heat-resisting, arc resistance energy and weather resisting property.Current pantograph pan mainly contains powder shaped charge liner, pure carbon slipper and leaching metal slider three major types.
Powder shaped charge liner mechanical strength is high, good impact resistance, has good electric conductivity, heat conductivity, arc resistance, resistance to abrasion and anti-attrition; But it is because powder shaped charge liner material is metal and self lubricity is poor, more serious to lead abrasion.Self lubricity and the anti-attrition of carbon slipper are good, and high temperature resistant, not easily occur to weld phenomenon with contact line conducting wire; But the mechanical strength of carbon slipper is low, poor impact resistance, run into wire hard spot in operation and easily cause slide plate fracture or break, service life is short.In addition, carbon slipper intrinsic resistance is large, and current collection capacity is little.The feature that metal-impregnated carbon slide existing powder shaped charge liner mechanical strength is high, electrical resistivity is little, has again the premium properties that pure carbon slipper is little to lead abrasion, but metal-impregnated carbon slide also exists impact resistance deficiency, easily occurs falling block, cost crosses the problems such as high.
Carbon/carbon composite is the composite material of fibre reinforced carbon matrix, there is high-strength and high-modulus, density be little, thermal expansion coefficient is little, anticorrosive, heat shock resistance, chemical inertness are good, a series of super performance such as structural behaviour designability, be a kind of material of construction of heat structure-function integration of excellence.Along with improving constantly of carbon/carbon composite performance, its application is constantly expanded.Because carbon/carbon composite has excellent wear resistance, mechanical property and electric conductivity, become a kind of Novel friction current-collecting member of excellence, be very suitable for preparing pantograph pan.
Chinese patent " CN101049803B; the preparation method of charcoal/charcoal pantograph pan in use for electric locomotive " adopts acupuncture without the accurate three-dimensional structure precast body of latitude carbon cloth, chemical vapor deposition is adopted to prepare pyrolytic carbon matrix on precast body surface, carrying out resin-dipping-charring process with Posterior circle carries out densified to precast body, finally obtains rate density and is greater than 1.70g/cm
3carbon/carbon composite; Use for electric locomotive carbon/carbon composite pantograph pan has been obtained by pattern processing.Chinese patent " CN101830723B; a kind of preparation method of carbon/carbon composite material for pantograph pan " adds the thermosetting resin of the high fixing carbon of boron class catalyst by dipping in carbon fabric perform, through circulation dipping-cure under pressure-charing, and obtain carbon/carbon composite material for pantograph pan through last graphitization processing.All adopt the overall felt of carbon fiber or Needled mat as the reinforcement of carbon/carbon composite in said method, the mechanical property of obtained carbon/carbon composite, resistance to abrasion and anti-attrition are better, but electric conductivity is poor.In addition, need in forming materials process circulation repeatedly carry out flooding-carbonize densification process, the production cycle is longer, further increases material cost.Carbon/carbon composite high cost limits its key applied on electric locomotive pantograph sliding plate.
The three-dimensional hybrid knitted body that Chinese patent " CN103192718A; a kind of pantograph pan composite material and preparation method thereof " adopts carbon fiber and copper wire to form is as reinforcement, prepare metallic copper well-distributed composite material by chemical vapor deposition and thermosetting resin dipping-charring process, improve the electric conductivity of carbon/carbon composite.Chinese patent " CN101403079B, the preparation method of carbon/carbon-carbon/carbon-copper composite material " adopts high temperature insostatic pressing (HIP) to ooze process for copper, achieves metallic copper being uniformly distributed in porous carbon/carbon compound material.Chinese patent " ZL200710035954.6; a kind of charcoal/composite material of carbon/carbon/copper and production technology thereof " is using needled carbon felt as carbon/carbon composite reinforcement, obtain preparing low-density carbon/carbon composite by chemical vapor deposition or resin-dipping-charring process, then ooze copper acquisition charcoal/composite material of carbon/carbon/copper by vacuum pressure.The three-dimensional structure that said method adopts needled carbon felt (alternately laminated with carbon net tire without latitude carbon cloth) or carbon cloth to become with proof copper-wire braided is as the reinforcement of carbon/carbon composite, and the carbon/carbon composite prepared exists the anisotropy of larger performance.Adopt vacuum to ooze process for copper when preparing charcoal/composite material of carbon/carbon/copper, need add the Problem of Wettability that Ni, Cr or Ti improve copper and carbon/carbon composite, because the pressure that infiltrates is limited, there is the problem of copper skewness in the material prepared.Adopt high temperature insostatic pressing (HIP) to ooze the problem that copper solves copper skewness in carbon/carbon composite, but equipment manufacturing cost is expensive, operation and maintenance difficulty, is unsuitable for the extensive preparation of charcoal/composite material of carbon/carbon/copper.
summary of the invention:
Technical matters to be solved by this invention is: provide a kind of good as the mechanical property of modifier using homodisperse Graphene-copper (silver), electrical resistivity is low, the preparation method of with short production cycle, lower-cost carbon/carbon composite pantograph pan.
The technical scheme that the present invention takes for technical solution problem is as follows:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.05 ~ 0.5mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.10 ~ 0.50M, regulate pH to 4.5 ~ 6.5 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
In step (4), in described chemical vapor deposition stove, depositing temperature is 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane.
In step (5), in described coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours.
The present invention has the following advantages compared with the method described in background technology:
(1) needled carbon fabric integer felt is made up of the chopped carbon fiber of length 1 ~ 10mm, and the performance of the carbon/carbon composite obtained for reinforcement with it goes out isotropy.
(2) introduce graphene film on chopped carbon fiber surface, the conductivity of carbon/carbon composite fiber/matrix interface can be improved; Meanwhile, introduce in graphene membrane surface the electrical resistivity that copper can reduce composite material further.
detailed description of the invention:
Below in conjunction with specific embodiment, concrete elaboration is done to the present invention.
Embodiment 1:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.05mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.10M, regulate the pH=4.5 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon, depositing temperature: 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours, dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
The density of the carbon/carbon composite of obtained Graphene-copper modification is 1.72g/cm
3, compressive strength 96.2MPa, rupture strength 66.8MPa, electrical resistivity 6.1mW × m, Shore hardness 63HS.
Embodiment 2:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.20mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.20M, regulate the pH=5.0 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon, depositing temperature: 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
The density of the carbon/carbon composite of obtained Graphene-copper modification is 1.74g/cm
3, compressive strength 100.4MPa, rupture strength 71.2MPa, electrical resistivity 5.4mW × m, Shore hardness 67HS.
Embodiment 3:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.30mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.30M, regulate the pH=5.5 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon, depositing temperature: 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
The density of the carbon/carbon composite of obtained Graphene-copper modification is 1.77g/cm
3, compressive strength 112.5MPa, rupture strength 80.3MPa, electrical resistivity 4.9mW × m, Shore hardness 65HS.
Embodiment 4:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol.%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.40mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.40M, regulate the pH=6.0 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon, depositing temperature: 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
The density of the carbon/carbon composite of obtained Graphene-copper modification is 1.75g/cm
3, compressive strength 118.7MPa, rupture strength 82.4MPa, electrical resistivity 4.9mW × m, Shore hardness 66HS.
Embodiment 5:
A preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, comprises following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.50mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.50M, regulate the pH=6.5 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon, depositing temperature: 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
The density of the carbon/carbon composite of obtained Graphene-copper modification is 1.77g/cm
3, compressive strength 120.0MPa, rupture strength 85.1MPa, electrical resistivity 5.1mW × m, Shore hardness 68HS.
The above, be only preferred embodiment of the present invention, and be not used to limit scope of the present invention, and the above embodiment of the present invention can also make a variety of changes.Namely every claims according to the present patent application and description are done simple, equivalence change and modify, and all fall into the claims of patent of the present invention.The not detailed description of the present invention be routine techniques content.
Claims (3)
1. a preparation method for Graphene-copper modification carbon/carbon composite pantograph pan, is characterized in that, comprise following preparation process:
(1) needled carbon fabric integer felt being immersed concentration is in the nital of 45vol%, soaks and to pull out after 5 hours and to be washed with distilled water to neutrality, puts into 60 DEG C of vacuum drying chambers dryings 24 hours afterwards;
(2) the needled carbon fabric integer felt that step (1) processed being dipped in concentration is in 0.05 ~ 0.5mg/mL graphene solution, soaks and drains away the water after 36 hours, puts into 120 DEG C of vacuum drying chambers dry 2 hours;
(3) Graphene step (2) prepared-needled carbon fabric integer felt is dipped in the cupric ammine complex solution of 0.10 ~ 0.50M, regulate pH to 4.5 ~ 6.5 of cupric ammine complex solution, be aided with ultrasonic vibration during immersion, soak taking-up after 10 hours and put into 120 DEG C of vacuum drying chambers dry 2 hours;
(4) the overall felt of carbon fiber of Graphene-copper modification step (3) prepared is put into chemical vapor deposition stove and is deposited pyrolytic carbon;
(5) the low-density carbon/carbon composite obtained step (4) carries out coal tar dipping-charing process; Dipping-charing circulation 5 times, the carbon/carbon composite of obtained Graphene-copper modification;
(6) carbon/carbon composite of Graphene-copper modification obtained for step (5) is pressed figure paper conversion, the carbon/carbon composite pantograph pan of Graphene-copper modification can be obtained.
2. the preparation method of Graphene according to claim 1-copper modification carbon/carbon composite pantograph pan, it is characterized in that: in step (4), in described chemical vapor deposition stove, depositing temperature is 1100 DEG C; Deposition pressure: 10kPa; Sedimentation time: 20 hours; Carbon-source gas is methane.
3. the preparation method of Graphene according to claim 1-copper modification carbon/carbon composite pantograph pan, it is characterized in that: in step (5), in described coal tar dipping-charing process, dipping temperature: 240 DEG C, pressure 5.0MPa, dip time 2 hours; Carbonization temperature 1200 DEG C, carbonization heating rate 1 DEG C/min, Carbonization Pressure 1.0MPa, carbonization time 2 hours.
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| CN105887059A (en) * | 2016-06-14 | 2016-08-24 | 西北工业大学 | Preparation method of high-thermal-conductivity carbon/carbon-copper composite material |
| CN106585388A (en) * | 2016-12-07 | 2017-04-26 | 中南大学 | Composite for pantograph slide plate of electric vehicle and preparation method thereof |
| CN106698396A (en) * | 2016-12-06 | 2017-05-24 | 董兰田 | Method for preparing powdered graphene membrane through vacuum oscillation and pressurization |
| CN107446159A (en) * | 2017-07-18 | 2017-12-08 | 成都新柯力化工科技有限公司 | Graphene calcium carbonate nanosphere and preparation method are used in a kind of plastics enhancing |
| CN107556059A (en) * | 2017-08-29 | 2018-01-09 | 自贡东新电碳有限责任公司 | A kind of preparation method of high ferro with pantograph with leaching copper carbon slide plate |
| CN108585913A (en) * | 2018-03-14 | 2018-09-28 | 江苏大学 | A kind of use for electric locomotive graphene is modified the preparation method of charcoal/charcoal pantograph pan |
| CN108726508A (en) * | 2018-07-07 | 2018-11-02 | 福州大学 | A kind of low cost prepares the preparation method of graphene hollow fibre |
| CN109484190A (en) * | 2018-10-17 | 2019-03-19 | 大同新成新材料股份有限公司 | A kind of preparation process of carbon-fiber reinforced carbon pantograph pan |
| CN114853496A (en) * | 2022-04-22 | 2022-08-05 | 陕西科技大学 | C/C-Cu-Ni composite material for pantograph and preparation method thereof |
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| CN105887059A (en) * | 2016-06-14 | 2016-08-24 | 西北工业大学 | Preparation method of high-thermal-conductivity carbon/carbon-copper composite material |
| CN106698396A (en) * | 2016-12-06 | 2017-05-24 | 董兰田 | Method for preparing powdered graphene membrane through vacuum oscillation and pressurization |
| CN106698396B (en) * | 2016-12-06 | 2022-10-25 | 董兰田 | Method for preparing powdery graphene membrane by vacuum oscillation pressurization |
| CN106585388B (en) * | 2016-12-07 | 2020-01-14 | 中南大学 | Composite material for pantograph slide plate of electric vehicle and preparation method thereof |
| CN106585388A (en) * | 2016-12-07 | 2017-04-26 | 中南大学 | Composite for pantograph slide plate of electric vehicle and preparation method thereof |
| CN107446159A (en) * | 2017-07-18 | 2017-12-08 | 成都新柯力化工科技有限公司 | Graphene calcium carbonate nanosphere and preparation method are used in a kind of plastics enhancing |
| CN107446159B (en) * | 2017-07-18 | 2019-02-05 | 深圳市高科塑化有限公司 | A kind of plastics enhancing graphene calcium carbonate nanosphere and preparation method |
| CN107556059B (en) * | 2017-08-29 | 2020-07-07 | 自贡东新电碳有限责任公司 | Preparation method of copper-impregnated carbon sliding plate for pantograph for high-speed rail |
| CN107556059A (en) * | 2017-08-29 | 2018-01-09 | 自贡东新电碳有限责任公司 | A kind of preparation method of high ferro with pantograph with leaching copper carbon slide plate |
| CN108585913A (en) * | 2018-03-14 | 2018-09-28 | 江苏大学 | A kind of use for electric locomotive graphene is modified the preparation method of charcoal/charcoal pantograph pan |
| CN108585913B (en) * | 2018-03-14 | 2020-05-01 | 江苏大学 | Preparation method of graphene modified carbon/carbon pantograph slide plate for electric locomotive |
| CN108726508A (en) * | 2018-07-07 | 2018-11-02 | 福州大学 | A kind of low cost prepares the preparation method of graphene hollow fibre |
| CN109484190A (en) * | 2018-10-17 | 2019-03-19 | 大同新成新材料股份有限公司 | A kind of preparation process of carbon-fiber reinforced carbon pantograph pan |
| CN109484190B (en) * | 2018-10-17 | 2020-06-05 | 大同新成新材料股份有限公司 | Preparation process of carbon fiber reinforced carbon pantograph slide plate |
| CN114853496A (en) * | 2022-04-22 | 2022-08-05 | 陕西科技大学 | C/C-Cu-Ni composite material for pantograph and preparation method thereof |
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