CN1456717A - Method and apparatus for preapring high strength and high modulus graphitized carbon fibers - Google Patents
Method and apparatus for preapring high strength and high modulus graphitized carbon fibers Download PDFInfo
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- CN1456717A CN1456717A CN 03137023 CN03137023A CN1456717A CN 1456717 A CN1456717 A CN 1456717A CN 03137023 CN03137023 CN 03137023 CN 03137023 A CN03137023 A CN 03137023A CN 1456717 A CN1456717 A CN 1456717A
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Abstract
A high-strength and high-modulus graphitized carbon fibre is prepared through introducing cooling water, argon gas and methane gas to a plasma generator, turning on the plasma generator by applying 3-5 kg/sq.cm of pressure, 20-40 V and 80-100 A to form a high-temp area in it at 2500-3500 deg.c, and passing carbon fibre through it while staying in it for 5-15 S.
Description
Technical field:
The invention belongs to a kind of method for preparing carbon fiber, relate in particular to a kind of method and apparatus that utilizes the heat plasma technology to prepare the high-strength and high-modulus graphitized carbon fibre.
Background technology:
High modulus carbon fiber is an important kind in the carbon fiber family, is the most important reinforcing material of advanced composite material, and purposes is widely arranged in the national defense construction and the development of the national economy.Carbon fiber is at 2500 ℃～3500 ℃ and apply under the traction condition and heat, and makes that graphite microcrystal axial orientation degree increases in the fiber, and size increases, and degree of perfection increases, and promptly obtains high mould graphite fibre.Graphite fibre is to prepare through graphitization processing on the basis of carbon fiber, thereby the key of development graphite fibre is high-temperature technology and high-temperature service.At present general in the world graphitization technique adopts is the resistance graphitizing furnace of graphite heater or height, intermediate frequency graphitizing furnace, all there are shortcomings such as equipment manufacturing cost costliness, energy consumption is big, the thermal efficiency is low in these method for graphitizing, particularly can not realize the carburizing-strengthening action of graphite fibre.
Summary of the invention:
The method and apparatus that the purpose of this invention is to provide the preparation high-strength and high-modulus graphitized carbon fibre that a kind of energy consumption is low, cost is low.
The present invention utilizes heat plasma technology to make carbon fiber carry out graphitization, simultaneously the ion carbon that is produced by the working media methane cracking infiltrates in the hole of carbon fiber after the graphitization and the surface, is the method and apparatus that a cover is finished surface and inner carburizing when realizing carbon fiber and graphiteization.Reach the purpose of fiber densification and raising intensity, modulus.
The method of the present invention prepares high-strength, high mould graphite fibre comprises the steps:
One, cooling water, working media argon gas and methane gas are fed plasma generator, wherein the volume ratio of argon gas and methane gas is 1-8: 100;
Two, be 3～5kg/cm at pressure
2, when 20～40 volts of voltages, electric current 80～100A, plasma generator produces the high temperature of 2500 ℃～3500 ℃ of regional areas, beyond this zone is room temperature, with carbon fiber by the plasma high-temperature district, by the time the time of staying be 5～15 seconds, thereby the graphitized carbon fibre of the high strength of obtaining and high-modulus.
In order to reach the foregoing invention purpose, designed the plasma generator isolated plant, it is to connect by insulating flange between cathode reactor and the anode, one gas passage is arranged between insulating flange and the anode, gas passage one end has the distribution of gas ring between cathode reactor and anode, water inlet and delivery port are on cathode reactor, and air inlet communicates with gas passage, advance the silk mouth and be positioned at cathode reactor one end, filament mouth is positioned at anode one end.
The present invention compared with prior art has following advantage: owing to adopted such scheme, can in a set of equipment, realize graphitization and fiber surface and inner carburizing simultaneously, because of causing intensity, blemish reduces this great difficult problem after having solved carbon fiber and graphiteization, the present invention axially feeds fiber, so fiber is difficult for short splitting, finally obtain the graphitized carbon fibre of high strength and high-modulus, energy consumption is low, product cost is low.
The specific embodiment:
The present invention is further described below in conjunction with drawings and Examples.Fig. 1 is a plasma generator structural representation of the present invention
Connect by insulating flange 6 between cathode reactor 2 and the anode 7 as shown in the figure, between insulating flange 6 and the anode 7 gas passage is arranged, gas passage one end has distribution of gas ring 4 between cathode reactor 2 and anode 7, water inlet 3 and delivery port 9 are on cathode reactor 2, air inlet 5 communicates with gas passage, advance silk mouth 1 and be positioned at cathode reactor 2 one ends, filament mouth 8 is positioned at anode 7 one ends.
Embodiment 1
Cooling water is fed from water inlet 3, and argon gas and methane gas are that 5: 100 ratio feeds air inlet 5 with volume ratio, and to make pressure be 3kg/cm
2, apply simultaneously the direct current of 80A to cathode reactor 2 and anode 7, adjusting voltage is 20 volts, argon gas and methane gas make gas discharge from 4 ejections of distribution of gas ring, formation electric arc.Methane cracking produces the ion carbon vapor under the effect of hot plasma.Feed a carbon fiber from advancing silk mouthful 1, the control time of staying of carbon fiber in stove is 15 seconds, and from the filament mouth 8 high-strength and high-modulus graphitized carbon fibre that comes out, reaction finishes back its elastic modelling quantity of test and tensile strength, and its result lists in the table 1.
Argon gas and methane gas feed gas inlet 5 with 1: 100 ratio, and making the reacting furnace internal pressure is 4kg/cm
2, the electric current at the two poles of the earth is 90A, and voltage is 30 volts, and the control time of staying of carbon fiber in stove is 10 seconds, and other all carries out with quadrat method and condition by embodiment 1, and reaction finishes back its elastic modelling quantity of test and tensile strength, the results are shown in Table 1.
Argon gas and methane gas feed air inlet 5 with 8: 100 ratio, and the adjustment electric current is 100A, and voltage is 40 volts, and the pressure in the reacting furnace is 5kg/cm
2The control time of staying of carbon fiber in stove is 5 seconds.Other all carries out with quadrat method and condition by embodiment 1, and reaction finishes back its elastic modelling quantity of test and tensile strength, the results are shown in Table 1.Table 1
As can be seen from the above table: adopt above-mentioned embodiment, the fiber that produces has reached M40J (elastic modelling quantity 379Gpa, tensile strength 4.43GPa) level.
| Condition, result/example number | Embodiment 1 | | |
| Pressure (kg/cm 2) | ????3 | ?????4 | ??????5 |
| The time of staying (s) | ????15 | ?????10 | ??????5 |
| Electric current (A) | ????80 | ?????90 | ??????100 |
| Voltage (V) | ????20 | ?????30 | ??????40 |
| Tensile strength (GPa) | ????4.49 | ?????4.36 | ??????4.43 |
| Elastic modelling quantity (GPa) | ????378 | ?????391 | ??????384 |
Claims (2)
1. a method for preparing the high-strength and high-modulus graphitized carbon fibre is characterized in that comprising the steps:
(1) cooling water, working media argon gas and methane gas are fed plasma generator, wherein the volume ratio of argon gas and methane gas is 1-8: 100;
(2) be 3～5kg/cm at pressure
2, when 20～40 volts of voltages, electric current 80～100A, plasma generator produces the high temperature of 2500 ℃～3500 ℃ of regional areas, beyond this zone is room temperature, with carbon fiber by the plasma high-temperature district, by the time the time of staying be 5～15 seconds, thereby the graphitized carbon fibre of the high strength of obtaining and high-modulus.
2. a kind of device for preparing the method for high-strength and high-modulus graphitized carbon fibre as claimed in claim 1, it is characterized in that connecting by insulating flange 6 between cathode reactor 2 and the anode 7, between insulating flange 6 and the anode 7 gas passage is arranged, gas passage one end has distribution of gas ring 4 between cathode reactor 2 and anode 7, water inlet 3 and delivery port 9 are on cathode reactor 2, air inlet 5 communicates with gas passage, advances silk mouth 1 and is positioned at cathode reactor 2 one ends, and filament mouth 8 is positioned at anode 7 one ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03137023 CN1456717A (en) | 2003-05-29 | 2003-05-29 | Method and apparatus for preapring high strength and high modulus graphitized carbon fibers |
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| CN 03137023 CN1456717A (en) | 2003-05-29 | 2003-05-29 | Method and apparatus for preapring high strength and high modulus graphitized carbon fibers |
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| CN 03137023 Pending CN1456717A (en) | 2003-05-29 | 2003-05-29 | Method and apparatus for preapring high strength and high modulus graphitized carbon fibers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696113A (en) * | 2015-12-04 | 2016-06-22 | 江西大有科技有限公司 | Device for manufacturing carbon fibers through nonequilibrium plasma and method of device |
| CN109763320A (en) * | 2018-12-24 | 2019-05-17 | 西安交通大学 | A kind of technique that graphene film repairs carbon fiber surface hole and crackle |
| CN111962287A (en) * | 2020-07-29 | 2020-11-20 | 孙世超 | Process for preparing high-performance low-cost graphitized carbon fiber by using joule heating technology |
-
2003
- 2003-05-29 CN CN 03137023 patent/CN1456717A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696113A (en) * | 2015-12-04 | 2016-06-22 | 江西大有科技有限公司 | Device for manufacturing carbon fibers through nonequilibrium plasma and method of device |
| CN105696113B (en) * | 2015-12-04 | 2018-06-26 | 江西大有科技有限公司 | A kind of devices and methods therefor using nonequilibrium plasma manufacture carbon fiber |
| CN109763320A (en) * | 2018-12-24 | 2019-05-17 | 西安交通大学 | A kind of technique that graphene film repairs carbon fiber surface hole and crackle |
| CN111962287A (en) * | 2020-07-29 | 2020-11-20 | 孙世超 | Process for preparing high-performance low-cost graphitized carbon fiber by using joule heating technology |
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