CN111748905B - Reprocessing method for recycled carbon fiber - Google Patents
Reprocessing method for recycled carbon fiber Download PDFInfo
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- CN111748905B CN111748905B CN202010542418.0A CN202010542418A CN111748905B CN 111748905 B CN111748905 B CN 111748905B CN 202010542418 A CN202010542418 A CN 202010542418A CN 111748905 B CN111748905 B CN 111748905B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4242—Carbon fibres
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G11/00—Disintegrating fibre-containing articles to obtain fibres for re-use
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
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- Engineering & Computer Science (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
The invention relates to a reprocessing method for recycled carbon fibers, which comprises the following steps: (1) making the recycled carbon fibers into a recycled carbon fiber felt; (2) Cleaning and drying the recycled carbon fiber felt body, and removing surface impurities; (3) And connecting the leading lugs at two ends of the recycled carbon fiber felt body, connecting the leading lugs with a power supply, performing high-voltage electric treatment, taking down the leading lugs after the treatment, cleaning and drying to obtain the carbon fiber felt body. Compared with the prior art, the invention has wide application range and can be suitable for carbon fiber products with different resin residues and recovered by different methods. Meanwhile, the treatment time is short, and the improvement of the carbon fiber performance can be ensured under lower energy consumption.
Description
Technical Field
The invention relates to recovery of carbon fibers, in particular to a reprocessing method for recovering carbon fibers.
Background
The resin-based carbon fiber composite material (simply referred to as "composite material") is a composite material which uses thermosetting resin or thermoplastic resin as a matrix and uses carbon fibers and fabrics (unidirectional cloth, two-dimensional woven cloth, three-dimensional woven prefabricated body and the like) or short-cut scattered fibers as reinforcements. The composite material has high specific strength, high specific rigidity, high corrosion resistance, excellent performance, structural design and flexible formability, is widely applied to the fields of national defense, aerospace, aviation, automobiles, energy sources, buildings and the like, and becomes one of the strut materials in the important fields. With the expansion of the application field of composite material components, the recovery of composite material components and waste materials has become an important economic and environmental issue.
In view of the ease of forming the composite material and the differences in application fields and functions, the shape of the composite material member is generally complex, and the material systems are different, so that the recovery of the composite material is difficult to realize by a single means, wherein the carbon fiber composite material product has excellent performance and high manufacturing cost, and the high-cost carbon fiber and even high-performance resin matrix thereof is recovered and reused, so that the composite material has important strategic value. The main current composite material recovery technology mainly comprises a high-temperature pyrolysis method, a solution dissolution method and a supercritical dissolution method, and the basic ideas of the high-temperature pyrolysis method, the solution dissolution method and the supercritical dissolution method are to remove a resin matrix and obtain carbon fibers. During recycling, high temperature treatment or strong oxidizer corrosion processes are often involved, which can damage the morphology of the carbon fiber tows and even damage the carbon fiber tows themselves. Therefore, when the carbon fiber is reused, the recovered carbon fiber is cut and screened. Due to the messy morphology and dispersion of properties of the fibers, it is difficult to ensure stable quality after cutting, which limits the overall properties of the composite material using this as reinforcement. In addition, the cutting of the fiber introduces additional operation steps, the implementation is troublesome, and meanwhile, the cut carbon fiber is not suitable for the processing method of the braiding body molding, so the application field of the method is greatly limited, therefore, a great number of research and development personnel are researching how to process and recycle the carbon fiber, for example, chinese patent CN108586797A discloses a recycling preparation method of waste carbon fiber PA6 composite materials, and the partial recycling method can maintain the integrity of carbon fiber tows to a certain extent, but the recycling process involves a plurality of steps, and is not beneficial to large-scale recycling operation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a reprocessing method for recycling carbon fibers, which can effectively improve the performance of carbon fiber tows, improve the performance stability of carbon fiber felts and improve the comprehensive performance of composite materials.
The aim of the invention can be achieved by the following technical scheme: a method for reprocessing recycled carbon fibers, comprising the steps of:
(1) Making the recycled carbon fibers into a recycled carbon fiber felt;
(2) Cleaning and drying the recycled carbon fiber felt body, and removing surface impurities;
(3) And connecting the leading lugs at two ends of the recycled carbon fiber felt body, connecting the leading lugs with the positive electrode and the negative electrode of the voltage-stabilizing direct current power supply, performing high-voltage electric treatment, taking down the leading lugs after the treatment, cleaning and drying to obtain the carbon fiber felt body.
The recycled carbon fiber in the step (1) is one or more of chopped fiber, continuous carbon fiber, two-dimensional carbon fiber fabric or three-dimensional carbon fiber fabric recycled by pyrolysis, solution dissolution or supercritical dissolution.
The method for preparing the recycled carbon fiber felt body from the recycled carbon fibers in the step (1) is to slit the recycled carbon fibers (if the size and the shape are proper, the recycled carbon fibers can not be slit), and the recycled carbon fiber felt body is prepared by non-woven forming (using a forming method such as needling).
Cutting the recycled carbon fiber felt body into rectangular felt pieces before cleaning in the step (2).
The cleaning agent used in the cleaning process of the step (2) and the step (3) is one or more of ethanol, acetone, methylene dichloride, trichloroethylene, tetrachloroethylene, chloroform or carbon tetrachloride, and is used for removing grease and impurities on the surface of the recovered carbon fiber to be treated, removing residual adhesive, impurities and the like on the surface of the recovered carbon fiber after the treatment.
The lug in the step (3) is a copper foil, a sheet red copper electrode, a sheet graphite electrode or a combination thereof.
And (3) binding the lugs at two ends of the recycled carbon fiber felt body through a binder, wherein the binder is one or more of conductive silver paste, conductive adhesive ICA and conductive adhesive ACA.
The high-voltage electric treatment in the step (3) is carried out in a protective atmosphere, wherein the protective atmosphere is an argon atmosphere, a nitrogen atmosphere or a combination thereof.
In the high-voltage electric treatment process of the step (3), the applied voltage density is 1V/cm 2 ～5V/cm 2 The treatment time is 10 s-300 s. Further preferably, the voltage density is 3V/cm 2 ～4V/cm 2 The treatment time is 60 s-120 s.
Since carbon fiber is a good electric heating element, when a sufficiently large current is supplied, the carbon fiber itself rapidly rises to an extremely high temperature. In the carbon fiber felt, the overlapping parts of the carbon fiber tows are in a hot spot state in the process of electrifying and heating due to lack of bonding, so that the overlapping parts become hot spots, and the heat is higher than that of the carbon fiber tows, so that the carbon fiber tows are co-lattice, the welding among fibers is realized, and the uniformity and the stability of the felt are improved. Meanwhile, the carbon fiber felt is in a high-temperature state (> 2000K) in the high-voltage electric treatment process and is close to the graphitization temperature of the carbon material, so that the graphitization degree of the carbon fiber tows is improved, cracks and defects on the carbon fibers can be effectively repaired, and the mechanical property, the electric conductivity and the heat conductivity of the carbon fibers are improved. In addition, impurities such as resin, surfactant and the like remained on the surface of the recovered carbon fiber can be further removed at high temperature, so that the interface performance between the fiber and the resin matrix can be further improved, and the comprehensive performance of the composite material can be improved.
The application mode of the invention comprises the steps of further sizing treatment, wherein the application mode is thermoplastic or thermosetting resin matrix composite material; the application is conductive and heat-conductive composite materials; the application is the electric heating element and other functional materials; the application is the electrocatalytic, energy storage and other functional materials.
Compared with the prior art, the invention has the following beneficial effects:
1. aiming at the problems of disordered recycled carbon fiber forms, dispersed performance and serious performance loss, the invention carries out rapid treatment on carbon fiber tows with different forms and unstable performance by reproducing the felt body and then leading high voltage at the two ends of the felt body, thereby effectively improving the performance of the carbon fiber tows, improving the performance stability of the carbon fiber felt body, improving the comprehensive performance of the composite material and expanding the recycling field of the recycled carbon fibers. Compared with the traditional reprocessing method of the recycled carbon fiber, the method provided by the invention can be suitable for the recycled carbon fiber with different surface residual resins and different treatment methods, has high universality and can obviously reduce the treatment time. Defects in the recycled carbon fiber tows subjected to retreatment can be effectively repaired, the mechanical properties, the electric conductivity and the thermal conductivity are improved, the lap joint in the fabric is effectively welded, the carbon fiber fabric is stable and uniform in performance, and the carbon fiber fabric is suitable for being used as a reinforcing body in the preparation of high-performance composite materials, so that the recycling of the recycled carbon fibers can be effectively promoted, and the application field of the recycled carbon fibers is enlarged.
2. The invention has short treatment time, can realize the improvement of mechanical, electric conduction, heat conduction and other performances of the recovered carbon fiber under lower energy consumption, and can effectively improve the interface performance between the carbon fiber and the resin matrix. The recycled carbon fiber after being electrified and reprocessed is suitable for being used as a reinforcement or a functional body, and is prepared into a composite material again to realize reutilization, so that the recycled carbon fiber has a huge application prospect as a mechanical part or an electrothermal heating functional part, and the development of a high added value reutilization technology of the recycled carbon fiber is promoted.
3. The carbon fiber fabric treated by the method is suitable for being used as a mechanical reinforcement or an electric heating function body, is prepared into a composite material integrating structure and functions, and can effectively promote the development of high added value recycling technology of the recycled carbon fiber.
Drawings
FIG. 1 is a reprocessing apparatus for recovering carbon fibers according to the present invention;
FIG. 2 is a schematic diagram of a reprocessing method for recovering carbon fibers according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
In the following examples, unless otherwise indicated, materials or processing techniques are all typical of those commercially available in the art.
As shown in fig. 1, the method comprises the steps of firstly finishing the recovered disordered carbon fibers to obtain a felt, then cutting the felt into regular rectangular recovered carbon fiber felt 1, connecting lugs 2 at two ends of the felt, placing the felt in a closed box, connecting the two ends of the lugs 2 with a voltage-stabilizing direct-current power supply 4 through wires under the atmosphere of protective gas 3, applying high voltage to the two ends of the recovered carbon fiber felt 1, enabling the recovered carbon fiber felt 1 to reach extremely high temperature (> 1600K) in a short time by utilizing the principle of joule heat, and further removing impurities such as resin, surfactant and the like remained on the surface of the recovered carbon fibers at the high temperature, thereby improving the interface performance between the carbon fibers and a resin matrix. At the same time, the extremely high temperature is favorable for graphitization of carbon, so that the electrified treatment can repair defects in the carbon fiber tows and realize connection of overlapping parts of the carbon fiber tows, and the schematic diagram is shown in fig. 2. From a macroscopic view, the mechanical property of the carbon fiber felt can be obviously improved; meanwhile, the electric conductivity and the heat conductivity of the carbon fiber felt can be effectively improved by improving the graphitization degree. In addition, as the welding of the lap joint of the carbon fiber tows is realized in the electrifying treatment, the performance of the felt body becomes more uniform, and the performance stability of the felt body is effectively improved.
Example 1:
and ultrasonically cleaning the bi-directional carbon fiber cloth after pyrolysis recovery by using ethanol for 1h. And then placing the cleaned carbon fiber cloth in a vacuum oven at 60 ℃ and drying for 12 hours. And then carrying out non-woven forming on the recycled carbon fiber cloth, and cutting the recycled carbon fiber cloth into rectangular pieces with the length of 10cm multiplied by 5cm for later use. And bonding two red copper sheet electrodes with the size of 4cm multiplied by 5cm on two sides of the cut recycled carbon fiber cloth sheet by utilizing conductive silver paste, and placing the two red copper sheet electrodes in a vacuum oven at 70 ℃ for drying for 3 hours. And transferring the dried sample into a closed box body with an argon protective atmosphere, and connecting the anode and the cathode of the stabilized DC power supply with the red copper sheet electrode. Electrifying the carbon fiber cloth by using 150V voltage with the voltage density of 3V/cm 2 The power-on time is 1min. And (3) taking out the sample after electrifying, removing red copper sheet electrode lugs at two ends, cleaning the carbon fiber after electrifying treatment by using acetone, removing residual adhesive and impurities, and drying in a vacuum oven at 60 ℃ for 12 hours to obtain a solid sample.
The carbon fiber cloth before and after the electrifying treatment is used as a reinforcement body to prepare a thermosetting resin matrix composite material respectively, bisphenol A epoxy resin (E-51) is used as a resin matrix, methyl nadic anhydride is used as a curing agent, tertiary amine salt is used as an accelerator, and the materials are uniformly mixed at normal temperature, wherein the mass ratio of the resin to the curing agent to the accelerator is 100:98.5:4. And (3) molding by using a vacuum auxiliary molding process, wherein the curing system is 1h at 100 ℃ and 4h at 130 ℃, and the carbon fiber reinforced composite material is obtained. Through mechanical tests, the tensile strength of the composite material taking the carbon fiber before treatment as a reinforcement is 377.4MPa, and the bending strength is 449.3MPa; the tensile strength of the composite material prepared from the carbon fibers after the electrification treatment reaches 430.6MPa and the bending strength is 503.9MPa, which shows that the electrification treatment effectively repairs the defects in the carbon fiber tows, and meanwhile realizes 'welding' on the lap joint of the carbon fiber fabrics, thereby remarkably improving the mechanical properties of the carbon fiber fabrics.
Example 2:
and carrying out ultrasonic cleaning on the carbon fiber precursor obtained by the supercritical dissolution thermosetting composite material method, wherein the cleaning time is 1h. And then placing the cleaned carbon fiber cloth in a vacuum oven at 60 ℃ and drying for 12 hours. And then carrying out non-woven forming on the recycled carbon fiber cloth, and cutting the recycled carbon fiber cloth into rectangular sheets with the length of 8cm multiplied by 6cm for standby. Two pieces of copper foil with the size of 6cm multiplied by 5cm are adhered to two sides of the cut recovered carbon fiber cloth piece by using conductive adhesive ICA, and the cut recovered carbon fiber cloth piece is placed in a vacuum oven at 70 ℃ and dried for 3 hours. Transferring the dried sample into a closed box body with an argon protective atmosphere, and connecting the anode and the cathode of the stabilized DC power supply with the copper foil. The carbon fiber cloth is electrified by using 120V voltage with the voltage density of 2.5V/cm 2 The energizing time is 3min. And (3) taking out the sample after electrifying, removing copper foil lugs at two ends, cleaning the carbon fiber after electrifying treatment by using acetone, removing residual adhesive and impurities, and drying in a vacuum oven at 60 ℃ for 12 hours to obtain a solid sample.
The carbon fiber cloth before and after the electrifying treatment is used as a reinforcement body to prepare a thermosetting resin matrix composite material respectively, bisphenol A epoxy resin (E-48) is used as a resin matrix, triethylene tetramine is used as a curing agent, tertiary amine salt is used as an accelerator, and the materials are uniformly mixed at normal temperature, wherein the mass ratio of the resin to the curing agent to the accelerator is 100:15:2. And (3) molding by using a vacuum auxiliary molding process, wherein the curing system is that the carbon fiber reinforced composite material is cured for 24 hours at room temperature. Through mechanical tests, the tensile strength of the composite material taking the carbon fiber before treatment as a reinforcement is 280.3MPa, and the bending strength is 322.7MPa; the tensile strength of the composite material prepared from the carbon fiber after the electrification treatment reaches 348.6MPa, and the bending strength is 385.5MPa, which shows that the electrification treatment can obviously improve the mechanical property of the composite material and improve the high added value recycling value of the recovered carbon fiber.
Example 3
In the high-voltage electric treatment, the applied voltage density is 1V/cm 2 The treatment time was 300s. The procedure is as in example 1.
The carbon fiber cloth before and after the electrifying treatment is used as a reinforcement body to prepare a thermosetting resin matrix composite material respectively, bisphenol A epoxy resin (E-51) is used as a resin matrix, methyl nadic anhydride is used as a curing agent, tertiary amine salt is used as an accelerator, and the materials are uniformly mixed at normal temperature, wherein the mass ratio of the resin to the curing agent to the accelerator is 100:98.5:4. And (3) molding by using a vacuum auxiliary molding process, wherein the curing system is 1h at 100 ℃ and 4h at 130 ℃, and the carbon fiber reinforced composite material is obtained. Through mechanical tests, the tensile strength of the composite material taking the carbon fiber before treatment as a reinforcement is 377.4MPa, and the bending strength is 449.3MPa; the tensile strength of the composite material prepared from the carbon fibers after the electrification treatment reaches 440.3MPa and the bending strength is 510.5MPa, which shows that the electrification treatment effectively repairs the defects in the carbon fiber tows, and meanwhile realizes 'welding' on the lap joint of the carbon fiber fabrics, thereby remarkably improving the mechanical properties of the carbon fiber fabrics.
Example 4
In the high-voltage electric treatment, the applied voltage density was 5V/cm 2 The treatment time was 10s. The procedure is as in example 1.
The carbon fiber cloth before and after the electrifying treatment is used as a reinforcement body to prepare a thermosetting resin matrix composite material respectively, bisphenol A epoxy resin (E-51) is used as a resin matrix, methyl nadic anhydride is used as a curing agent, tertiary amine salt is used as an accelerator, and the materials are uniformly mixed at normal temperature, wherein the mass ratio of the resin to the curing agent to the accelerator is 100:98.5:4. And (3) molding by using a vacuum auxiliary molding process, wherein the curing system is 1h at 100 ℃ and 4h at 130 ℃, and the carbon fiber reinforced composite material is obtained. Through mechanical tests, the tensile strength of the composite material taking the carbon fiber before treatment as a reinforcement is 377.4MPa, and the bending strength is 449.3MPa; the tensile strength of the composite material prepared from the carbon fibers after the electrification treatment reaches 436.7MPa and the bending strength is 495.4MPa, which shows that the electrification treatment effectively repairs the defects in the carbon fiber tows, and meanwhile realizes 'welding' on the lap joint of the carbon fiber fabrics, thereby remarkably improving the mechanical properties of the carbon fiber fabrics.
Claims (2)
1. A method for reprocessing recycled carbon fibers, comprising the steps of:
(1) Making the recycled carbon fibers into a recycled carbon fiber felt body: slitting the recycled carbon fibers, and performing non-woven molding to prepare a recycled carbon fiber felt;
(2) Cutting the recycled carbon fiber felt into rectangular felt pieces, cleaning, drying and removing surface impurities;
(3) Connecting the two ends of the recycled carbon fiber felt body with the leading lugs, connecting the recycled carbon fiber felt body with a power supply through the leading lugs, performing high-voltage electric treatment, taking down the leading lugs after the treatment, cleaning and drying to obtain the carbon fiber felt body; in the high-voltage electric treatment, the applied voltage density is 3V/cm 2 ～4V/cm 2 The treatment time is 60 s-120 s; the high-voltage electric treatment is carried out in a protective atmosphere, wherein the protective atmosphere is argon atmosphere, nitrogen atmosphere or a combination thereof; the leading lugs are adhered to the two ends of the recycled carbon fiber felt body through an adhesive, and the adhesive is one or more of conductive silver paste, conductive adhesive ICA and conductive adhesive ACA; the lug is copper foil, a sheet red copper electrode, a sheet graphite electrode or a combination thereof;
the recycled carbon fiber in the step (1) is one or more of chopped fiber, continuous carbon fiber, two-dimensional carbon fiber fabric or three-dimensional carbon fiber fabric recycled by pyrolysis, solution dissolution or supercritical dissolution.
2. The method according to claim 1, wherein the cleaning agent used in the cleaning process of step (2) and step (3) is one or more of ethanol, acetone, methylene chloride, trichloroethylene, tetrachloroethylene, chloroform or carbon tetrachloride.
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| CN202010542418.0A CN111748905B (en) | 2020-06-15 | 2020-06-15 | Reprocessing method for recycled carbon fiber |
| PCT/CN2021/099540 WO2021254256A1 (en) | 2020-06-15 | 2021-06-11 | Method for reprocessing recycled carbon fibers |
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| CN111748905B (en) * | 2020-06-15 | 2023-06-06 | 上海交通大学 | Reprocessing method for recycled carbon fiber |
| CN114567941B (en) * | 2022-03-11 | 2024-03-15 | 郑州大学 | Method for preparing electrothermal heating sheet by utilizing carbon fiber braided fabric leftover materials |
| GB2615837B (en) * | 2022-03-15 | 2024-07-24 | Mdf Recovery Ltd | Method and apparatus for recovering fibres |
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| JPH0726450A (en) * | 1993-07-06 | 1995-01-27 | Mitsubishi Paper Mills Ltd | Active carbon fiber sheet and its production |
| CN200950668Y (en) * | 2006-09-08 | 2007-09-19 | 许安民 | Soft, breathable planar heating composite electric heating cloth |
| FR2942149B1 (en) * | 2009-02-13 | 2012-07-06 | Camille Cie D Assistance Miniere Et Ind | METHOD AND SYSTEM FOR VALORIZING MATERIALS AND / OR PRODUCTS BY PULSE POWER |
| DE102010001787A1 (en) * | 2010-02-10 | 2011-08-11 | Sgl Carbon Se, 65203 | A method of making a molded article from a carbon material using recycled carbon fibers |
| CN103938429B (en) * | 2014-04-28 | 2016-01-20 | 华南理工大学 | A kind of surface treatment of carbon fibers device and method based on corona discharge |
| CN104772116B (en) * | 2015-04-02 | 2017-11-10 | 江苏科净炭纤维有限公司 | A kind of discarded active carbon fiber fabrics/felt recovery reconstruction method |
| CN205556988U (en) * | 2016-04-28 | 2016-09-07 | 常州市新创复合材料有限公司 | Make production of carbon fiber felt equips through carbon fiber waste material |
| CN105854512A (en) * | 2016-06-13 | 2016-08-17 | 何莉 | Activated carbon fiber adsorption device |
| CN107083020A (en) * | 2017-05-19 | 2017-08-22 | 常熟市奥欣复合材料有限公司 | The recycling method of carbon fiber and its product |
| CN109866441A (en) * | 2017-12-05 | 2019-06-11 | 广州金发碳纤维新材料发展有限公司 | A kind of manufacturing method recycling fibre reinforced Thermoplastic Laminates |
| CN108176388A (en) * | 2017-12-06 | 2018-06-19 | 张家港绿色三星净化科技股份有限公司 | Activated carbon fiber desorption method |
| CN109637842A (en) * | 2018-11-22 | 2019-04-16 | 武汉纺织大学 | A kind of preparation method of carbon fiber felt electrode material |
| CN111235864A (en) * | 2020-03-19 | 2020-06-05 | 上海交通大学 | Surface treatment method for recycled carbon fibers |
| CN111748905B (en) * | 2020-06-15 | 2023-06-06 | 上海交通大学 | Reprocessing method for recycled carbon fiber |
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