A kind of preparation device and process of graphene fiber

Abstract

The present invention relates to the field of graphene fiber preparation, and specifically to a graphene fiber preparation device and process, wherein the preparation device includes a drying mechanism, a paving carrier, a spraying mechanism, a scraping mechanism, and a winding mechanism; the spraying mechanism and the paving carrier move relative to each other, the spraying mechanism includes a spraying plate located above the paving carrier plane, the bottom of the spraying plate is provided with a spraying port, and the spraying port is opposite to the paving carrier plane; the scraping mechanism and the paving carrier move relative to each other, the scraping mechanism includes a scraper located above the paving carrier plane, the bottom of the scraper is located on the paving carrier, and the bottom of the scraper is provided with a plurality of arc-shaped grooves arranged laterally. The process is carried out using the above-mentioned device. Through this application, the problem of easy breakage of graphene oxide primary filaments during winding and winding is solved.

Description

Technical Field

[0001] The present invention relates to the field of graphene fiber preparation, and in particular to a graphene fiber preparation device and process. Background Art

[0002] The preparation method of graphene fiber in the prior art is as follows: preparing graphene oxide suspension, extruding the graphene oxide suspension through a nozzle, spraying the graphene oxide suspension into a forming groove of a conveyor belt, drying the graphene oxide suspension in the forming groove to form graphene oxide primary filaments, and combining the graphene oxide suspension with the graphene oxide suspension. Figure 6 The figure shows a schematic diagram of a primary graphene oxide yarn 10 positioned in a forming groove. A conveyor belt then transports the primary graphene oxide yarn 10 to a winding wheel, where it is extracted from the forming groove and wound on the winding wheel. The primary graphene oxide yarn 10 on the winding wheel is then twisted into graphene oxide fibers, which are then chemically reduced to produce graphene fibers.

[0003] When the above method is used, since the primary graphene oxide filament 10 is located in the molding groove, the connection area between the outer wall of the primary graphene oxide filament 10 and the inner wall of the molding groove is large, the outer wall of the primary graphene oxide filament 10 and the inner wall of the molding groove are adhered together, and the primary graphene oxide filament 10 and the molding groove are not easy to separate. During the process of pulling the primary graphene oxide filament 10 out of the molding groove, if the operation is improper, such as improper control of the speed of the winding wheel, the primary graphene oxide filament 10 is prone to breakage. After breaking, the primary graphene oxide filament 10 needs to be connected or a new winding wheel needs to be replaced and rewound, which is troublesome. Summary of the Invention

[0004] The present invention aims to provide a graphene fiber preparation device and process to solve the problem that graphene oxide primary filaments are prone to breakage when being wound and rolled.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a graphene fiber preparation device, comprising a drying mechanism, a material laying carrier, a material spraying mechanism, a material scraping mechanism and a winding mechanism;

[0006] The spraying mechanism and the paving carrier move relative to each other. The spraying mechanism includes a spraying plate located above the plane of the paving carrier. The bottom of the spraying plate is provided with a spraying port, and the spraying port is opposite to the plane of the paving carrier.

[0007] The scraping mechanism and the paving carrier move relative to each other. The scraping mechanism includes a scraper located above the plane of the paving carrier. The bottom of the scraper is located on the paving carrier. The bottom of the scraper is laterally arranged with multiple arc-shaped grooves.

[0008] The principle and advantage of this solution are: the spraying mechanism is used to spray the graphene oxide suspension onto the paving carrier plane. Since the spraying mechanism and the paving carrier move relative to each other, the spraying mechanism can spray the graphene oxide suspension onto different parts of the paving carrier plane.

[0009] After the graphene oxide suspension is sprayed onto the paving carrier, a drying mechanism dries the graphene oxide suspension applied to the paving carrier, causing it to solidify and form a graphene oxide layer. A scraping mechanism then scrapes the graphene oxide layer on the plane of the paving carrier. Because the bottom of the scraper is provided with multiple arc-shaped grooves, when the bottom of the scraper and the paving carrier move relative to each other, the graphene oxide layer is scraped by the bottom of the scraper into multiple primary graphene oxide filaments. The drying mechanism then continues to dry the primary graphene oxide filaments, making them even more fully dried. Finally, a winding mechanism winds the primary graphene oxide filaments.

[0010] Because the groove at the bottom of the scraper is arc-shaped, the shape of the scraped graphene oxide primary filaments matches the shape of the groove. The top of the graphene oxide primary filaments is arc-shaped, and the contact area between adjacent graphene oxide primary filaments is very small (can be regarded as a line). Therefore, when the winding mechanism winds up a single graphene oxide primary filament, adjacent graphene oxide primary filaments are easily separated, thereby avoiding the situation where adjacent graphene oxide primary filaments are easily separated and broken due to a large degree of connection. At the same time, because the top of the paving carrier is flat, the bottom surface of the graphene oxide primary filaments is also flat. Compared with the prior art in which the graphene oxide primary filaments are located in the shaped groove of the paving carrier, the contact area between the graphene oxide primary filaments and the paving carrier is smaller, reducing the degree of contact between the graphene oxide primary filaments and the paving carrier, and the graphene oxide primary filaments are easily separated from the plane of the paving carrier. When the winding mechanism winds and winds the graphene oxide primary filaments, the graphene oxide primary filaments are not easily broken.

[0011] According to the present invention, a graphene oxide suspension can be spread on the plane of a paving carrier using a spray plate. After the graphene oxide suspension is dried, a graphene oxide layer is formed. Then, the graphene oxide layer is scraped and cut into a plurality of primary graphene oxide filaments by relative movement of a scraper and the paving carrier. The preparation method of the primary graphene oxide filaments is simple, and a plurality of primary graphene oxide filaments can be prepared at the same time. There is no need to use a plurality of spinnerets on the paving carrier to spray a plurality of primary graphene oxide filaments one by one. The operation is simple and convenient, and the efficiency of graphene oxide preparation is greatly improved.

[0012] Preferably, as an improvement, the drying mechanism is located below the plane of the paving carrier. Thus, the drying mechanism transfers heat to the paving carrier through heat transfer, and then the plane of the paving carrier can generate heat, thereby drying the graphene oxide suspension and the graphene oxide primary filaments.

[0013] Preferably, as an improvement, the drying mechanism includes a heating wire. Thus, the heating wire generates heat, thereby causing the plane of the paving carrier to heat up, thereby achieving drying and heating of the graphene oxide suspension and the primary graphene oxide filaments.

[0014] Preferably, as an improvement, the paving carrier is a conveyor belt, and the spraying mechanism and the scraping mechanism are in a stationary state. Thus, the paving carrier is moved by the conveyor belt, while the spraying mechanism and the scraping mechanism are in a stationary state relative to the ground, so that the spraying mechanism and the paving carrier move relative to each other, and the scraping mechanism and the paving carrier move relative to each other.

[0015] Preferably, as an improvement, the paving carrier is a stationary paving platform, and the spraying mechanism and the scraping mechanism are capable of moving along the paving platform. Of course, the paving carrier can also be stationary relative to the ground, while the spraying mechanism and the scraping mechanism are movable, thereby achieving the mutual movement of the spraying mechanism and the paving carrier, and the mutual movement of the scraping mechanism and the paving carrier.

[0016] Preferably, as an improvement, the paving platform is annular, and a vertical rotating shaft is provided at the center of the paving platform, and the spraying mechanism, the scraping mechanism and the winding mechanism are all installed on the rotating shaft. Thus, by rotating the rotating shaft, the rotating shaft drives the spraying mechanism, the scraping mechanism and the winding mechanism to rotate around the rotating shaft, and the movement trajectories of the spraying mechanism, the scraping mechanism and the winding mechanism are all annular. In this way, the spraying mechanism can move relative to the annular paving platform, and the movement trajectory of the spraying plate of the spraying mechanism is annular, so that the graphene oxide suspension is sprayed onto the annular paving platform, and then the scraper of the scraping mechanism moves along the annular trajectory on the paving platform, so that the dried graphene oxide layer is scraped and cut into a plurality of graphene oxide primary filaments, and then the movement trajectory of the winding mechanism is also annular, and the winding mechanism winds up the scraped graphene oxide primary filaments. Therefore, through this solution, while the material is being spread on the spreading table, the scraping mechanism scrapes and cuts the dried graphene oxide layer, and the winding mechanism rewinds the scraped and cut graphene oxide primary filaments. The spreading, scraping, and rewinding operations are performed simultaneously. After the primary graphene oxide filaments are rewound, new space is made on the spreading table, which can be used by the rotating spraying mechanism to spray the material. Because the spreading table is annular, the motion paths of the spraying mechanism, scraping mechanism, and rewinding mechanism are also annular, so the spreading table can be used continuously. As long as the entire device does not stop and the rotating shaft does not stop rotating, primary graphene oxide filaments can be continuously produced. Compared with the linear motion paths of the spraying mechanism, scraping mechanism, and rewinding mechanism (for example, a straight line, in this case, the spreading table is linear), there is no need to reverse the movement of the spraying mechanism, scraping mechanism, and rewinding mechanism from one end of the spreading table to the other end to reset.

[0017] Preferably, as an improvement, the winding mechanism includes a plurality of winding rollers, each of which is fixed with a plurality of partition plates, the partition plates and the winding rollers are arranged vertically, the plurality of partition plates are arranged in parallel, and there are gaps between adjacent partition plates.

[0018] As a result, the graphene oxide layer is scraped and cut into multiple graphene oxide primary filaments by the scraper. The number of primary graphene oxide filaments is large, so multiple winding rollers are required to wind the primary graphene oxide filaments. At the same time, each winding roller will wind multiple primary graphene oxide filaments. Therefore, multiple partition plates are provided on each winding roller, and separate gaps are formed between adjacent partition plates. In this way, different primary graphene oxide filaments will be wound separately in different gaps, avoiding the situation where different primary graphene oxide filaments on the same winding roller interfere with each other and cause winding chaos.

[0019] To achieve the above object, the present invention also adopts the following technical solution: a preparation process of graphene fiber, comprising the following steps:

[0020] S1, spraying the graphene oxide suspension onto the plane of the paving carrier to form a graphene oxide layer;

[0021] S2. The scraping mechanism and the paving carrier are moved relative to each other, and the bottom of the scraper scrapes the graphene oxide layer and cuts the graphene oxide layer into a plurality of primary graphene oxide filaments;

[0022] S3, drying the primary graphene oxide filaments, and then winding the primary graphene oxide filaments with a winding mechanism.

[0023] According to this solution, since the groove at the bottom of the scraper in S2 is in an arc shape, the shape of the scraped graphene oxide primary filaments matches the shape of the groove, the top of the graphene oxide primary filaments is in an arc shape, and the contact surface between adjacent graphene oxide primary filaments is very small (can be regarded as a line). Therefore, when the winding mechanism in S3 winds up a single graphene oxide primary filament, adjacent graphene oxide primary filaments are easily separated, thereby avoiding the situation where adjacent graphene oxide primary filaments are difficult to separate and break due to a large degree of connection. At the same time, since the top of the paving carrier is flat, the bottom surface of the primary graphene oxide filaments is also flat. Compared with the prior art in which the primary graphene oxide filaments are located in the forming grooves of the paving carrier, the contact area between the primary graphene oxide filaments and the paving carrier is smaller, which reduces the degree of contact between the primary graphene oxide filaments and the paving carrier. The primary graphene oxide filaments are easily separated from the plane of the paving carrier, and when the winding mechanism winds and rewinds the primary graphene oxide filaments, the primary graphene oxide filaments are not easy to break.

[0024] Preferably, as an improvement, the method further comprises the following steps:

[0025] S4, twisting the graphene oxide primary filaments to form twisted fibers;

[0026] S5. Reduce the twisted fibers to convert them into graphene fibers.

[0027] Preferably, as an improvement, the speed at which the scraper and the paving carrier move relative to each other is 0.02-20 m / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a graphene fiber preparation device from a top view.

[0029] Figure 2 Schematic diagram of the structure of the bottom of the scraper.

[0030] Figure 3 Schematic diagram of the winding mechanism winding the graphene oxide primary filaments located on the laying table.

[0031] Figure 4 This is the main sectional view of the spray plate and the paving table.

[0032] Figure 5 This is a schematic diagram of the semicircular cross-section of primary graphene oxide filaments formed by scraping on a paving table using the scraper of this embodiment.

[0033] Figure 6 This is a schematic cross-sectional view of the graphene oxide primary filaments located in the forming groove of the laying table.

[0034] Figure 7 Schematic diagram of the cross section of the square graphene oxide primary silk formed by scraping on the laying table. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The figure marks in the drawings of the specification include: laying platform 1, rotating shaft 2, second support arm 3, first support arm 4, spray plate 5, scraper 6, third support arm 7, winding roller 8, groove 9, graphene oxide primary filament 10, spray chamber 11, partition plate 12, gap 13.

[0037] The embodiment is basically as shown in the attached Figure 1-Figure 5 A graphene fiber production device is shown, comprising a drying mechanism, a material spreading carrier, a material spraying mechanism, a material scraping mechanism, and a winding mechanism. The material spreading carrier in this embodiment is an annular material spreading platform 1, with a width of 0.1-1m and an inner diameter of 0.3-3m. The top of the material spreading platform 1 is made of metal and has a smooth surface.

[0038] The center of the paving platform 1 is equipped with a vertically mounted rotating shaft 2, which is bolted to a base on the ground. The bottom end of the rotating shaft 2 is rotatably connected to the base via a bearing. A motor is mounted on the outside of the rotating shaft 2 to drive the rotating shaft 2. A gearbox is connected between the motor and the rotating shaft 2. The material spraying mechanism, scraping mechanism, and winding mechanism are all mounted on the rotating shaft 2.

[0039] The spraying mechanism in this embodiment includes a first support arm 4 and a spraying plate 5. The first support arm 4 is fixed to the rotating shaft 2 by bolts, and the spraying plate 5 is installed on the first support arm 4 by screws. The first support arm 4 and the spraying plate 5 are both located above the paving platform 1. The spraying plate 5 is arranged vertically, and a spraying chamber 11 is provided inside the spraying plate 5. A spraying port is provided at the bottom of the spraying plate 5, and the spraying port is connected to the spraying chamber 11. The thickness of the spraying plate 5 is 5 cm, and the thickness of the spraying chamber 11 is 2-4 cm. The thickness of the spraying port is less than the thickness of the spraying chamber 11, and the length of the spraying port is ≤ the width of the paving platform 1, so as to avoid the graphene oxide suspension sprayed from the spraying port from being sprayed to the outside of the plane of the paving platform 1. The distance between the bottom of the spraying plate 5 and the plane of the paving platform 1 is 0.1-2 mm. A material box (not shown in the figure) is installed on the rotating shaft 2, and the material box is filled with graphene oxide suspension. A material pipe (not shown in the figure) is connected between the material box and the spraying chamber 11 of the spraying plate 5, and the graphene oxide suspension in the material box can enter the spraying plate 5 through the material pipe.

[0040] In this embodiment, the scraping mechanism includes a second support arm 3 and a scraper 6 located above the paving carrier plane. The scraper 6 is fixed to the second support arm 3 by screws. The scraper 6 is vertically arranged. The scraper 6 is made of metal. The bottom of the scraper 6 is located on the paving carrier plane. Figure 2 As shown, the bottom of the scraper 6 is laterally arranged with a plurality of arc-shaped grooves 9, the shape of the grooves 9 is semicircular, and the bottom end of the connection between two adjacent grooves 9 is a pointed tip, and the radius of the groove 9 is 0.1-2 mm. The radius of the groove 9 is determined according to the diameter size requirements of the prepared fiber filaments. For example, the fiber filaments of reinforcing materials, thermal insulation materials, and protective materials are thicker, and the fiber filaments in the medical, filtration and protection fields are thinner.

[0041] The winding mechanism includes a plurality of third support arms 7 and a plurality of rotating shafts and a winding roller 8. In this embodiment, the number of the third support arms 7, the rotating shaft and the winding roller 8 are all three. The rotating shaft is rotatably connected to the end of the third support arm 7 through a bearing. The third support arm 7 is provided with a motor for driving the rotating shaft to rotate. The winding roller 8 is cylindrical and can be sleeved on the rotating shaft. The inner wall of the winding roller 8 and the outer wall of the rotating shaft are matched through splines and spline grooves, so that the rotating shaft can drive the winding roller 8 to rotate. The winding roller 8 and the rotating shaft are fixed by magnetic attraction, thereby preventing the winding roller 8 from sliding axially on the rotating shaft. Combined with Figure 3As shown, each winding roller 8 is welded and fixed (or clamped) with multiple partition plates 12, the partition plates 12 and the winding roller 8 are arranged vertically, and the multiple partition plates 12 are arranged in parallel. There is a gap 13 between adjacent partition plates 12, and a graphene oxide primary filament 10 can be wound in each gap 13.

[0042] The drying mechanism is located below the plane of the paving carrier and includes a heating wire connected to a power source so that the heating wire can heat the plane of the paving carrier by energizing the heating wire.

[0043] In this embodiment, the rotation of the rotating shaft 2 drives the spraying mechanism and the scraping mechanism to rotate about the rotating shaft 2, while the paving carrier remains stationary, thereby achieving relative movement between the paving carrier and the spraying mechanism, and thus the relative movement between the paving carrier and the scraping mechanism. Of course, in other embodiments, the spraying mechanism and the scraping mechanism may also be stationary relative to the ground, and the paving carrier may be a conveyor belt with a smooth upper surface. The movement of the conveyor belt achieves relative movement between the paving carrier and the spraying mechanism, and thus the relative movement between the paving carrier and the scraping mechanism.

[0044] This embodiment also discloses a preparation process of graphene fiber, comprising the following steps:

[0045] S1. Take graphene oxide, add graphene oxide to deionized water to form a graphene oxide suspension with a mass concentration of 5g / L, add the graphene oxide suspension to a material box, a pressure tube is connected to the material box, nitrogen is used for pressurization, and pressure is applied to the material box through the pressure tube, and the graphene oxide suspension in the material box enters the spray plate 5, and the graphene oxide suspension is sprayed onto the plane of the paving platform 1 through the spray port at the bottom of the spray plate 5. At the same time, the rotating shaft 2 rotates, and the rotating shaft 2 drives the spray plate 5 to move through the first support arm 4. The movement speed of the spray plate 5 relative to the paving platform 1 is 1 meter / minute. After the graphene oxide suspension is sprayed onto the plane of the paving platform 1, the paving platform 1 initially heats the graphene oxide suspension, so that the graphene oxide suspension on the paving platform 1 forms a graphene oxide layer. The temperature of the surface of the paving platform 1 is 50-80°C.

[0046] S2, during the clockwise rotation of the shaft 2, the shaft 2 drives the second support arm 3 to move, and the second support arm 3 drives the scraper 6 to move, and the bottom of the scraper 6 scrapes the graphene oxide layer and cuts the graphene oxide layer into a plurality of graphene oxide primary filaments 10. Since the shape of the groove 9 at the bottom of the scraper 6 is semicircular, the Figure 5As shown, the resulting primary graphene oxide yarn 10 has a semicircular cross-section, an arc-shaped top, and a flat bottom. The contact between two adjacent primary graphene oxide yarns 10 can be considered as line contact. After the scraper 6 scrapes the graphene oxide layer, the spreading table 1 continues to dry the primary graphene oxide yarns 10, ensuring that they are dried more thoroughly.

[0047] S3, then as the shaft 2 continues to rotate, the shaft 2 drives the winding mechanism to rotate to the dried graphene oxide primary filaments 10, combined with Figure 3 As shown, a rotating winding roller 8 winds and reels the graphene oxide filaments 10, with different graphene oxide filaments 10 wound in different gaps 13. A partition plate 12 separates the graphene oxide filaments 10 to prevent them from becoming intertwined. Due to the large number of graphene oxide filaments 10, multiple winding rollers 8 are used to wind and reel the filaments 10 separately. The rotation speed of the winding rollers 8 is set based on parameters such as the rotation speed of the rotating shaft 2 and the diameter of the winding rollers 8 to ensure stable winding of the graphene oxide filaments 10.

[0048] S4. Twisting the graphene oxide primary filaments 10 to form twisted fibers.

[0049] S5. Reducing the twisted fibers to convert them into graphene fibers, for example, by chemical reduction, under the following conditions: avoiding light, at a temperature of 80 degrees Celsius, and using hydroiodic acid for reduction.

[0050] In this embodiment, because the rotating shaft 2 simultaneously performs material laying, scraping, and winding during rotation, multiple graphene oxide primary fibers 10 are formed simultaneously during the scraping process, thereby improving the efficiency of producing the primary graphene oxide fibers 10. Furthermore, after the primary graphene oxide fibers 10 on the laying platform 1 are wound, the laying platform 1 makes room for the spraying mechanism to continue laying material onto the laying platform 1, thereby achieving a continuous production and winding cycle of the primary graphene oxide fibers 10.

[0051] Combine Figure 5 As shown, the cross-sectional shape of the graphene oxide primary filament 10 in this embodiment is semicircular. Assuming that the bottom diameter of the graphene oxide primary filament 10 is d and the length is L, the contact area between the graphene oxide primary filament 10 and the laying platform 1 is d*L. Figure 6As shown, if a forming groove is set on the surface of the paving platform 1 according to the existing technology, when the shape and size of the primary graphene oxide filaments 10 are consistent, the contact area between the primary graphene oxide filaments 10 and the paving platform 1 is 0.5*π*d*L. It is obvious that 0.5*π*d*L>d*L. Therefore, the contact area between the primary graphene oxide filaments 10 prepared by the present device and method and the paving platform 1 is small, the primary graphene oxide filaments 10 and the paving platform 1 are easier to separate, and the primary graphene oxide filaments 10 are not easy to break when separated from the paving carrier.

[0052] In addition, the shape of the groove 9 in this embodiment is very important. If the groove 9 is square, combined with Figure 7 As shown, the cross-section of the graphene oxide primary filaments 10 formed after scraping is square, and the contact area between adjacent graphene oxide primary filaments 10 is surface contact. This larger contact area allows adjacent graphene oxide primary filaments 10 to adhere to each other over a large area during winding and wrapping, making separation difficult and prone to breakage. Therefore, the use of the arc-shaped grooves 9 in this embodiment makes the graphene oxide primary filaments 10 less susceptible to breakage.

[0053] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A graphene fiber preparation device, characterized in that: It includes drying mechanism, material spreading carrier, material spraying mechanism, material scraping mechanism and winding mechanism; The material spraying mechanism and the paving carrier move relative to each other. The material spraying mechanism includes a material spraying plate located above the plane of the paving carrier. The bottom of the material spraying plate is provided with a material spraying port, and the material spraying port is opposite to the plane of the paving carrier. The scraping mechanism and the paving carrier move relative to each other. The scraping mechanism includes a scraper located above the plane of the paving carrier. The bottom of the scraper is located on the paving carrier. The bottom of the scraper is provided with a plurality of arc-shaped grooves arranged transversely. The drying mechanism is located below the plane of the paving carrier.

2. The graphene fiber preparation device according to claim 1, characterized in that: The drying mechanism includes a heating wire.

3. The graphene fiber preparation device according to claim 1, characterized in that: The material spreading carrier is a conveyor belt, and the material spraying mechanism and the material scraping mechanism are in a stationary state.

4. The graphene fiber preparation device according to claim 1, characterized in that: The paving carrier is a stationary paving platform, and the spraying mechanism and the scraping mechanism can move along the paving platform.

5. The graphene fiber preparation device according to claim 4, characterized in that: The material spreading platform is annular, and a vertical rotating shaft is provided at the center of the material spreading platform. The material spraying mechanism, the material scraping mechanism and the winding mechanism are all installed on the rotating shaft.

6. The graphene fiber preparation device according to claim 5, characterized in that: The winding mechanism includes a plurality of winding rollers, each of which is fixed with a plurality of partition plates, the partition plates and the winding rollers are arranged vertically, the plurality of partition plates are arranged in parallel, and there is a gap between adjacent partition plates.

7. A process for preparing graphene fiber, characterized in that: The following steps are involved: S1, spraying the graphene oxide suspension onto the plane of the paving carrier to form a graphene oxide layer; S2. The scraping mechanism and the paving carrier according to claim 1 are moved relative to each other, and the bottom of the scraper scrapes the graphene oxide layer and cuts the graphene oxide layer into a plurality of primary graphene oxide filaments; S3, drying the primary graphene oxide filaments, and then winding the primary graphene oxide filaments using a winding mechanism.

8. The process for preparing graphene fiber according to claim 7, wherein: The following steps are also included: S4, twisting the graphene oxide primary filaments to form twisted fibers; S5. Reducing the twisted fibers.

9. The process for preparing graphene fiber according to claim 7, wherein: The relative movement speed of the scraper and the paving carrier is 0.02-20 m / min.

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