A kind of anti-oxidation viscose-based graphite felt and production process

Abstract

The present invention relates to the technical field of graphite felt, specifically to a production process of an antioxidant viscose-based graphite felt, wherein the graphite felt is cut and then wound on a feed rack, the graphite felt surface is pretreated in a pretreatment tank, the graphite felt surface is subjected to an antioxidant treatment, and finally the graphite felt is dried to obtain an antioxidant viscose-based graphite felt. The present invention sets a movable feed rack on the top of a processing box, and when the graphite felt is subjected to surface treatment, the graphite felt is wound on the feed rack, and the fixed plate and the movable plate of the feed rack are controlled to clamp the other side of the graphite felt, so as to limit the winding of the graphite felt on the feed rack. Compared with the existing winding structure, the graphite felt is wound along a spiral rack between two feed racks in the present application, so that a certain gap is left between the surfaces of the graphite felt, thereby facilitating the antioxidant treatment of the graphite felt as a whole, and at the same time improving the curing and drying efficiency of the graphite felt.

Description

Technical Field

[0001] The invention relates to the technical field of graphite felt, in particular to an anti-oxidation viscose-based graphite felt and a production process. Background Art

[0002] Graphite felt is divided into three types: asphalt-based graphite felt, polyacrylonitrile-based (PAN-based) graphite felt and viscose-based graphite felt, depending on the type of raw felt used. Its main use is as a heat preservation and insulation material for single crystal silicon smelting furnaces. In the chemical industry, it can be used as a filter material for high-purity corrosive chemical reagents. The process is to cut polyacrylonitrile-based carbon felt or viscose-based carbon felt into the required size, roll it into a cylinder and put it into a container made of graphite material, place the graphite container in a high-temperature furnace (the high-temperature furnace is a graphite tube furnace, medium-frequency, high-frequency induction furnace or other high-temperature furnace with heating form), and use vacuum or high-purity inert gas protection, and heat it to 2200-2500℃ at a heating rate of 100-300℃ / h, and then naturally cool it to 100℃.

[0003] Compared with polyacrylonitrile graphite felt, the existing viscose-based graphite felt has the advantages of not being easy to pulverize under continuous high temperature and having a smooth surface. However, the oxidation resistance of viscose-based graphite felt is poor, resulting in the finished viscose-based graphite felt having problems such as short life, poor durability and high cost when actually used in thermal insulation.

[0004] To this end, we propose an anti-oxidation viscose-based graphite felt and also disclose a production process of the anti-oxidation viscose-based graphite felt. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an antioxidant viscose-based graphite felt and a production process for improving the antioxidant properties of the viscose-based graphite felt and improving the antioxidant treatment efficiency of the viscose-based graphite felt.

[0006] To achieve the above objectives, the present invention is implemented by the following technical scheme: a production process of an anti-oxidation viscose-based graphite felt, specifically comprising the following steps:

[0007] Step S1: firstly, the viscose-based graphite felt is cut into a certain size, and the graphite felt is fed into the inside of the unwinding rack for winding;

[0008] Step S2: passing one side of the graphite felt through the inside of the feeding rack, and then placing one side of the graphite felt into the inside of the traction rack, using the fixed plate and the movable plate of the traction rack to clamp one side of the graphite felt and then traction, after the graphite felt is wound on the unwinding rack, controlling the fixed plate and the movable plate of the feeding rack to clamp the other side of the graphite felt, and completing the winding limit of the graphite felt on the unwinding rack;

[0009] Step S3: introducing a pretreatment solution into the pretreatment tank through a water inlet pipe, using the first electric slide to drive the movable frame to move to the top of the pretreatment tank, using the driving end of the first servo electric cylinder to drive the connecting frame to descend to the inside of the pretreatment tank, and then using the driving ends of the two first micro-electric cylinders to control the discharge frame to move downward under the connecting frame, the driving end of the second micro-electric cylinder extends out to push the driving block to one side of the discharge frame, so that the card block is inserted into the inside of the card slot, and the output shaft of the servo motor is used to drive the card block to rotate inside the driving block through the connecting column, so that the rotating frame drives the graphite felt to rotate, and the surface of the graphite felt is treated with the pretreatment solution, and then the graphite felt is sent to the cleaning and drying treatment tank for cleaning and drying;

[0010] Step S4: The dried graphite felt is sent into an antioxidant treatment tank, and the sealing plate is driven by the second electric slide to seal the top of the antioxidant treatment tank, and the graphite felt is controlled to rotate inside the antioxidant treatment tank, and the surface of the graphite felt is subjected to antioxidant treatment using an antioxidant solution. After the surface antioxidant treatment of the graphite felt is completed, the graphite felt is sent into a cleaning and drying treatment tank for cleaning and drying, and finally the graphite felt is sent into a vacuum tube furnace for treatment to obtain an antioxidant viscose-based graphite felt.

[0011] Preferably, in step S1, a processing box and a movable frame are also provided on one side of the material discharging rack, two fixed frames are provided on the top of the processing box, and a first electric slide is provided on one side of the two fixed frames, a movable frame is movably provided between the two fixed frames, and both sides of the movable frame are respectively connected to one side of the two first electric slides, first servo electric cylinders are also provided on both sides of the bottom of the movable frame, and connecting frames are provided at the driving ends of the two first servo electric cylinders.

[0012] Preferably, two unloading racks are arranged below the connecting rack, and a rotating rack is arranged on one side of the two unloading racks, a spiral rack is arranged on the opposite side of the two rotating racks, and a traction rack is slidably arranged on one side of the spiral racks, and a material passing rack is also arranged on the opposite side of the two rotating racks.

[0013] Preferably, a slide groove is provided on one side of the spiral frame, and a rack is provided inside the slide groove, a movable block is slidably provided inside the slide groove, and a gear is rotatably provided inside the movable block, wherein the inside of the gear is driven by a motor, and the surface of the gear is meshed with the surface of the rack for transmission, and the top of the movable block is connected to the bottom of the traction frame.

[0014] Preferably, the traction frame and the material feeding frame are both composed of a fixed plate and a movable plate, and an electromagnet is provided on the side of the fixed plate opposite to the movable plate, connecting plates are provided on both sides of the bottom of the movable plate, and connecting grooves matching with the connecting plates are provided on both sides of the top of the fixed plate, first micro-electric cylinders are provided on both sides of the inside of the material discharge rack, and the driving ends of the two first micro-electric cylinders are connected to the bottom of the connecting frame, one side of the rotating frame located on the left extends to the left side of the material discharge rack, and a card slot is provided on one side of the rotating frame, and a pre-treatment tank, an antioxidant treatment tank and a cleaning and drying treatment tank are provided in sequence from left to right inside the processing box.

[0015] Preferably, driving components are provided on both sides of the inner walls of the pre-treatment tank, the antioxidant treatment tank and the cleaning and drying treatment tank, and the driving components include a driving frame, second micro-electric cylinders are provided on both sides of the inner walls of the pre-treatment tank, the antioxidant treatment tank and the cleaning and drying treatment tank, and the driving end of the second micro-electric cylinder is provided with a driving frame, a card block is provided for rotation inside the driving frame, and one side of the card block cooperates with the card slot on one side of the rotating frame, a servo motor is provided inside the processing box, and a connecting column is provided at one end of the output shaft of the servo motor, and one end of the connecting column is slidably connected to one side of the card block.

[0016] Preferably, an air duct is provided on one side of the front of the processing box, and one end of the air duct extends to the interior of the cleaning and drying processing tank. A water inlet pipe and a water outlet pipe are also provided on the front of the processing box. Three groups of water inlet pipes and water outlet pipes are provided on the front of the processing box, and one end of the three groups of water inlet pipes and water outlet pipes extend to the interior of the pre-treatment tank, the antioxidant treatment tank and the cleaning and drying processing tank respectively. A sealing groove is provided inside the processing box, and a second electric slide is provided on both sides of the inner wall of the sealing groove, and a sealing plate is provided on one side of the electric slide.

[0017] Preferably, in step S3, the pre-treatment method of the graphite felt is as follows:

[0018] A nitric acid aqueous solution is prepared, and the graphite felt is immersed in the nitric acid aqueous solution, and then the graphite felt is washed with distilled water and ethanol in sequence, and the washed graphite felt is dried in a vacuum drying oven to complete the pretreatment of the graphite felt;

[0019] The nitric acid aqueous solution is prepared by mixing concentrated nitric acid and water in a volume ratio of 1:1.

[0020] Preferably, in step S4, the preparation method of the antioxidant solution is as follows:

[0021] Add melamine and deionized water into a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, heat the three-necked flask in a water bath to 80-90° C., stir and dissolve for 5-10 minutes at a stirring rate of 450-550 r / min to obtain a melamine aqueous solution, add boric acid into deionized water for mixed dissolution to obtain a boric acid aqueous solution, add the boric acid aqueous solution into the melamine aqueous solution, stir and react for 1-2 hours at a temperature of 80-90° C. and a stirring rate of 450-550 r / min, and finally perform a rotary evaporation treatment at a temperature of 90-100° C. to obtain a hexagonal boron nitride precursor powder;

[0022] Ammonium molybdate is added into deionized water for mixed dissolution to obtain an ammonium molybdate aqueous solution; polyvinyl pyrrolidone is added into deionized water for mixed dissolution to obtain a polyvinyl pyrrolidone aqueous solution; the ammonium molybdate aqueous solution and the polyvinyl pyrrolidone aqueous solution are evenly mixed and then added into a hydrochloric acid solution; the mixed solution is irradiated with ultraviolet light for 30 minutes, and then hexagonal boron nitride precursor powder is added, and ultrasonic treatment is performed for 45 minutes to obtain an antioxidant solution.

[0023] The mixing ratio of melamine and deionized water is 4 g: 200 mL, the mixing ratio of boric acid and deionized water is 2 g: 50 mL, the mixing ratio of ammonium molybdate and deionized water is 5 g: 60 mL, the mixing ratio of polyvinyl pyrrolidone and deionized water is 3 g: 30 mL, the volume ratio of the ammonium molybdate aqueous solution, the polyvinyl pyrrolidone aqueous solution and the hydrochloric acid solution is 60 mL: 30 mL: 2.5 mL, and the concentration of the hydrochloric acid solution is 1 mol / L;

[0024] The graphite felt is soaked in an antioxidant, and the entire graphite felt is immersed in the antioxidant for 30-50 minutes at a temperature of 50-70°C and a rotation speed of 60-80r / min. The graphite felt is then taken out and dried. Finally, the graphite felt is sent to a vacuum tube furnace and kept warm for 1-2 hours at a temperature of 1400-1500°C in an argon atmosphere, with an argon flow rate of 30mL / min and a heating rate of 5°C / min, so that the antioxidant is inorganicized on the surface of the graphite felt. Finally, the graphite felt is naturally cooled in the vacuum tube furnace to complete the antioxidant treatment of the graphite felt surface.

[0025] An antioxidant viscose-based graphite felt is produced by the production process of the antioxidant viscose-based graphite felt described in claims 1-9.

[0026] Compared with the prior art, it has the following beneficial effects:

[0027] 1. By arranging a movable unloading rack on the top of the processing box, when the graphite felt is surface treated, the graphite felt is wound on the unloading rack, and the fixed plate and the movable plate of the feeding rack are controlled to clamp the other side of the graphite felt to complete the winding limit of the graphite felt on the unloading rack. Compared with the existing winding structure, in this application, the graphite felt is wound along the spiral rack between the two unloading racks, so that a certain gap is left between the surfaces of the graphite felt, thereby facilitating the antioxidant treatment of the graphite felt as a whole and improving the curing and drying efficiency of the graphite felt.

[0028] 2. Pre-treating the graphite felt with nitric acid to remove the organic glue layer on the surface of the graphite felt, and introducing active groups to increase the surface energy of the graphite felt and the concentration of surface active carbon atoms, thereby improving the filling and adhesion of the antioxidant coating; then treating the surface of the graphite felt with an antioxidant and pre-treatment in turn, activating the surface of the graphite felt with an antioxidant to form an antioxidant coating on the surface of the graphite felt, and the nitrogen atoms in the antioxidant coating combine with CC in the graphite felt to form CN, thereby effectively improving the interface strength between the antioxidant coating and the graphite felt, and using the hexagonal boron nitride precursor powder and molybdenum trioxide in the antioxidant to block the diffusion of oxygen. The hexagonal boron nitride precursor powder generates a glassy boron oxide film under high-temperature oxidation conditions, which can further block the diffusion of oxygen into the interior of the boron nitride, thereby avoiding direct contact between oxygen and the graphite felt, and effectively improving the antioxidant properties of the graphite felt. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of a production process of an anti-oxidation viscose-based graphite felt according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the processing box and the material placing rack structure according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the movable frame and the material placing frame according to an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the connecting frame and the material placing frame according to an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the internal structure of a spiral rack according to an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of a fixed plate and a movable plate structure according to an embodiment of the present invention;

[0035] Figure 7 A top view of the internal structure of the processing box according to an embodiment of the present invention;

[0036] Figure 8 For the embodiment of the present invention Figure 7 A magnified view of the structure in the middle.

[0037] In the figure, 10, the material discharging rack; 20, the processing box; 30, the movable rack; 40, the fixed rack; 50, the first electric slide; 60, the first servo electric cylinder; 11, the connecting rack; 12, the rotating rack; 13, the spiral rack; 14, the traction rack; 15, the material passing rack; 16, the slide; 17, the rack; 18, the movable block; 19, the gear; 21, the fixed plate; 22, the movable plate; 23, the electromagnet; 24, the connecting plate; 25, the connecting groove; 26, the first micro electric cylinder; 31, the pre-treatment groove; 32, the antioxidant treatment groove; 33, the cleaning and drying treatment groove; 34, the air guide tube; 35, the water inlet pipe; 36, the water outlet pipe; 37, the sealing groove; 38, the second electric slide; 39, the sealing plate; 41, the driving rack; 42, the second micro electric cylinder; 43, the block; 44, the servo motor; 45, the connecting column. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figures 1 to 8 As shown, a production process of an antioxidant viscose-based graphite felt specifically comprises the following steps:

[0041] Step S1: firstly, the viscose-based graphite felt is cut into a certain size, and the graphite felt is fed into the unwinding rack 10 for winding;

[0042] Step S2: passing one side of the graphite felt through the inside of the feeding rack 15, and then putting one side of the graphite felt into the inside of the traction rack 14, using the fixed plate 21 and the movable plate 22 of the traction rack 14 to clamp one side of the graphite felt and then traction, after the graphite felt is wound on the unwinding rack 10, controlling the fixed plate 21 and the movable plate 22 of the feeding rack 15 to clamp the other side of the graphite felt, and completing the winding limit of the graphite felt on the unwinding rack 10;

[0043] Step S3: introducing the pretreatment solution into the pretreatment tank 31 through the water inlet pipe 35, using the first electric slide 50 to drive the movable frame 30 to move to the top of the pretreatment tank 31, using the driving end of the first servo electric cylinder 60 to drive the connecting frame 11 to descend to the inside of the pretreatment tank 31, and then using the driving ends of the two first micro-electric cylinders 26 to control the discharge rack 10 to move downward under the connecting frame 11, the driving end of the second micro-electric cylinder 42 extends out to push the driving block to one side of the discharge rack 10, so that the card block 43 is inserted into the inside of the card slot, and the output shaft of the servo motor 44 is used to drive the card block 43 to rotate inside the driving block through the connecting column 45, so that the rotating frame 12 drives the graphite felt to rotate, and the surface of the graphite felt is treated with the pretreatment solution, and then the graphite felt is sent to the cleaning and drying treatment tank 33 for cleaning and drying;

[0044] Step S4: The dried graphite felt is sent into the antioxidant treatment tank 32, and the sealing plate 39 is driven by the second electric slide 38 to seal the top of the antioxidant treatment tank 32, and the graphite felt is controlled to rotate inside the antioxidant treatment tank 32, and the surface of the graphite felt is subjected to antioxidant treatment using an antioxidant solution. After the antioxidant treatment of the surface of the graphite felt is completed, the graphite felt is sent to the cleaning and drying treatment tank 33 for cleaning and drying, and finally the graphite felt is sent to a vacuum tube furnace for treatment to obtain an antioxidant viscose-based graphite felt.

[0045] Further, the preparation method of the antioxidant solution is as follows:

[0046] Add melamine and deionized water into a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, heat the three-necked flask in a water bath to 80-90° C., stir and dissolve for 5-10 minutes at a stirring rate of 450-550 r / min to obtain a melamine aqueous solution, add boric acid into deionized water for mixed dissolution to obtain a boric acid aqueous solution, add the boric acid aqueous solution into the melamine aqueous solution, stir and react for 1-2 hours at a temperature of 80-90° C. and a stirring rate of 450-550 r / min, and finally perform a rotary evaporation treatment at a temperature of 90-100° C. to obtain a hexagonal boron nitride precursor powder;

[0047] Ammonium molybdate is added into deionized water for mixed dissolution to obtain an ammonium molybdate aqueous solution; polyvinyl pyrrolidone is added into deionized water for mixed dissolution to obtain a polyvinyl pyrrolidone aqueous solution; the ammonium molybdate aqueous solution and the polyvinyl pyrrolidone aqueous solution are evenly mixed and then added into a hydrochloric acid solution; the mixed solution is irradiated with ultraviolet light for 30 minutes, and then hexagonal boron nitride precursor powder is added, and ultrasonic treatment is performed for 45 minutes to obtain an antioxidant solution.

[0048] The mixing ratio of melamine and deionized water is 4g:200mL, the mixing ratio of boric acid and deionized water is 2g:50mL, the mixing ratio of ammonium molybdate and deionized water is 5g:60mL, the mixing ratio of polyvinyl pyrrolidone and deionized water is 3g:30mL, the volume ratio of ammonium molybdate aqueous solution, polyvinyl pyrrolidone aqueous solution and hydrochloric acid solution is 60mL:30mL:2.5mL, and the concentration of the hydrochloric acid solution is 1mol / L.

[0049] Further, the pre-treatment method of graphite felt is as follows:

[0050] Prepare a nitric acid aqueous solution, soak the graphite felt in the nitric acid aqueous solution at a temperature of 70-90°C, then wash the graphite felt with distilled water and ethanol in turn, dry the washed graphite felt in a vacuum drying oven at a temperature of 70-80°C, and complete the pretreatment of the graphite felt.

[0051] The nitric acid aqueous solution is prepared by mixing concentrated nitric acid and water in a volume ratio of 1:1.

[0052] Furthermore, the graphite felt is soaked in an antioxidant, and the entire graphite felt is immersed in the antioxidant for 30-50 minutes at a temperature of 50-70°C and a rotation speed of 60-80r / min. The graphite felt is then taken out and dried, and finally the graphite felt is sent to a vacuum tube furnace for 1-2 hours at a temperature of 1400-1500°C in an argon atmosphere, wherein the argon flow rate is 30mL / min and the heating rate is 5°C / min, so that the antioxidant is inorganicized on the surface of the graphite felt. Finally, the graphite felt is naturally cooled in the vacuum tube furnace to complete the antioxidant treatment of the graphite felt surface.

[0053] Example 2

[0054] Furthermore, a processing box 20 and a movable frame 30 are also provided on one side of the material discharging rack 10, two fixed frames 40 are provided on the top of the processing box 20, and a first electric slide 50 is provided on one side of the two fixed frames 40, a movable frame 30 is movably provided between the two fixed frames 40, and both sides of the movable frame 30 are respectively connected to one side of the two first electric slides 50, first servo electric cylinders 60 are also provided on both sides of the bottom of the movable frame 30, and connecting frames 11 are provided at the driving ends of the two first servo electric cylinders 60, material discharging racks 10 are provided on both sides below the connecting frame 11, and a rotating frame 12 is provided on one side of the two material discharging racks 10, a spiral frame 13 is provided on the opposite side of the two rotating frames 12, and a traction frame 14 is slidably provided on one side of the spiral frame 13, and a material passing rack 15 is also provided on the opposite side of the two rotating frames 12;

[0055] It should be noted that when the graphite felt is subjected to antioxidant treatment, the graphite felt is first wound on the unloading rack 10, and the graphite felt is passed through the inside of the feeding rack 15. Then, one side of the graphite felt is pulled by the traction rack 14, and the graphite felt is wound along the spiral rack 13 between the two unloading racks 10, so that a certain gap is left between the surfaces of the graphite felt, thereby facilitating the antioxidant treatment of the graphite felt as a whole and improving the curing and drying efficiency of the graphite felt.

[0056] Furthermore, a slide groove 16 is provided on one side of the spiral frame 13, and a rack 17 is provided inside the slide groove 16, a movable block 18 is slidably provided inside the slide groove 16, and a gear 19 is rotatably provided inside the movable block 18, wherein the interior of the gear 19 is driven by a motor, and the surface of the gear 19 is meshed with the surface of the rack 17 for transmission, and the top of the movable block 18 is connected to the bottom of the traction frame 14, and the meshing transmission between the gear 19 and the rack 17 drives the movable block 18 to move inside the slide groove 16, so that the traction frame 14 moves on the surface of the spiral frame 13, thereby realizing the spiral traction of the graphite felt on the discharge rack 10.

[0057] Furthermore, the traction frame 14 and the feeding frame 15 are both composed of a fixed plate 21 and a movable plate 22, and an electromagnet 23 is provided on the side of the fixed plate 21 opposite to the movable plate 22, and connecting plates 24 are provided on both sides of the bottom of the movable plate 22, and connecting grooves 25 matching with the connecting plates 24 are provided on both sides of the top of the fixed plate 21, wherein one side of the connecting plate 24 is slidably connected with the inside of the connecting groove 25, and the fixed plate 21 and the movable plate 22 are expanded and fitted by controlling the change of the magnetic poles of the two electromagnets 23. When the graphite felt is pulled, one side of the graphite felt is passed through the inside of the feeding frame 15, and then one side of the graphite felt is placed in the inside of the traction frame 14. One side of the graphite felt is clamped and then pulled by the fixed plate 21 and the movable plate 22 of the traction frame 14. After the graphite felt is wound on the unwinding rack 10, the fixed plate 21 and the movable plate 22 of the feeding rack 15 are controlled to clamp the other side of the graphite felt to complete the winding limit of the graphite felt on the unwinding rack 10. Compared with the existing winding structure, the scheme in the present application uses the spiral frame 13 to limit the two sides of the graphite felt, so that the surfaces of the graphite felt do not contact each other after winding, and a gap is left, so that the treatment effect of the graphite felt can be significantly improved during the pre-treatment and immersion of the graphite felt in the antioxidant, and the drying and cleaning efficiency of the graphite felt can also be effectively improved.

[0058] Furthermore, first micro-electric cylinders 26 are provided on both sides of the discharge rack 10, and the driving ends of the two first micro-electric cylinders 26 are connected to the bottom of the connecting frame 11, and the driving ends of the two first micro-electric cylinders 26 are used to control the discharge rack 10 to move downward under the connecting frame 11; one side of the rotating rack 12 located on the left side extends to the left side of the discharge rack 10, and a card slot is provided on one side of the rotating rack 12, and the interior of the processing box 20 is provided with a pre-treatment tank 31, an antioxidant treatment tank 32 and a cleaning and drying treatment tank 33 from left to right, and the two inner walls of the pre-treatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying treatment tank 33 are A driving component is provided on both sides, and the driving component includes a driving frame 41. Second micro-electric cylinders 42 are provided on both sides of the inner walls of the pre-treatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying treatment tank 33, and the driving end of the second micro-electric cylinder 42 is provided with a driving frame 41, and a block 43 is provided for rotation inside the driving frame 41, and one side of the block 43 cooperates with the slot on one side of the rotating frame 12. A servo motor 44 is provided inside the processing box 20, and a connecting column 45 is provided at one end of the output shaft of the servo motor 44, one end of the connecting column 45 is slidably connected to one side of the block 43, and the block 43 is provided in the shape of a regular hexagonal prism.

[0059] It should be noted that after the movable frame 30 drives the graphite felt on the discharge rack 10 to be placed into the pretreatment tank 31, the discharge rack 10 is controlled to move downward so that the slot on one side of the rotating rack 12 and the block 43 are on the same horizontal line, and then the driving end of the second micro-electric cylinder 42 is extended to push the driving block to one side of the discharge rack 10 so that the block 43 is inserted into the slot, and the output shaft of the servo motor 44 is used to drive the block 43 to rotate inside the driving block through the connecting column 45, so that the rotating rack 12 drives the graphite felt to rotate, so that the graphite felt can be better mixed with the solvent.

[0060] Furthermore, an air duct 34 is provided on one side of the front of the processing box 20, and one end of the air duct 34 extends to the interior of the cleaning and drying processing tank 33, wherein a blow pipe is provided inside the cleaning and drying processing tank 33, and the interior of the blow pipe is connected with the interior of the air duct 34, and hot air is sent into the interior of the blow pipe through the air duct 34 to quickly dry the graphite felt; a water inlet pipe 35 and a water outlet pipe 36 are also provided on the front of the processing box 20, and three groups of water inlet pipes 35 and water outlet pipes 36 are provided on the front of the processing box 20, and one end of the three groups of water inlet pipes 35 and water outlet pipes 36 respectively extend to the interior of the pre-treatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying processing tank 33, and the water inlet pipe 35 and the water outlet pipe 36 are used to introduce and discharge the solvent into and out of the pre-treatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying processing tank 33 to perform surface treatment on the graphite felt.

[0061] Furthermore, a sealing groove 37 is provided inside the processing box 20, and a second electric slide 38 is provided on both sides of the inner wall of the sealing groove 37, and a sealing plate 39 is provided on one side of the electric slide, and two sealing plates 39 are provided above the pretreatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying treatment tank 33 on both sides. After the wound graphite felt is placed in the pretreatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying treatment tank 33, the sealing plate 39 is driven by the second electric slide 38 to seal the top of the pretreatment tank 31, the antioxidant treatment tank 32 and the cleaning and drying treatment tank 33, so as to avoid contamination of the graphite felt during the surface treatment process and improve the surface treatment quality of the graphite felt.

[0062] Furthermore, this embodiment also discloses an anti-oxidation viscose-based graphite felt, which is produced by the above-mentioned production process of the anti-oxidation viscose-based graphite felt.

[0063] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for anti-oxidation viscose-based graphite felt, characterized in that: The specific steps include: Step S1: firstly, the viscose-based graphite felt is cut into a certain size, and the graphite felt is fed into the inside of the unwinding rack (10) for winding; Step S2: passing one side of the graphite felt through the inside of the material passing rack (15), and then placing one side of the graphite felt into the inside of the traction rack (14), using the fixed plate (21) and the movable plate (22) of the traction rack (14) to clamp one side of the graphite felt and then traction, after the graphite felt is wound on the unwinding rack (10), controlling the fixed plate (21) and the movable plate (22) of the material passing rack (15) to clamp the other side of the graphite felt, and completing the winding limit of the graphite felt on the unwinding rack (10); Step S3: introducing a pretreatment solution into the interior of the pretreatment tank (31) through the water inlet pipe (35), using the first electric slide (50) to drive the movable frame (30) to move to the top of the pretreatment tank (31), using the driving end of the first servo electric cylinder (60) to drive the connecting frame (11) to descend to the interior of the pretreatment tank (31), then using the driving ends of the two first micro electric cylinders (26) to control the discharge frame (10) to move downward under the connecting frame (11), the driving end of the second micro electric cylinder (42) extends to push the driving frame (41) to one side of the discharge frame (10), so that the card block (43) is inserted into the interior of the card slot, and using the output shaft of the servo motor (44) to drive the card block (43) to rotate inside the driving frame (41) through the connecting column (45), so that the rotating frame (12) drives the graphite felt to rotate, and the surface of the graphite felt is treated with the pretreatment solution, and then the graphite felt is sent to the cleaning and drying treatment tank (33) for cleaning and drying; The specific pretreatment method of graphite felt is as follows: A nitric acid aqueous solution is prepared, and the graphite felt is immersed in the nitric acid aqueous solution, and then the graphite felt is washed with distilled water and ethanol in sequence, and the washed graphite felt is dried in a vacuum drying oven to complete the pretreatment of the graphite felt; The nitric acid aqueous solution is prepared by mixing concentrated nitric acid and water in a volume ratio of 1:1; Step S4: the dried graphite felt is sent into an antioxidant treatment tank (32), and the sealing plate (39) is driven by the second electric slide (38) to seal the top of the antioxidant treatment tank (32), and the graphite felt is controlled to rotate inside the antioxidant treatment tank (32), and the surface of the graphite felt is subjected to antioxidant treatment using an antioxidant solution. After the surface antioxidant treatment of the graphite felt is completed, the graphite felt is sent into a cleaning and drying treatment tank (33) for cleaning and drying, and finally the graphite felt is sent into a vacuum tube furnace for treatment to obtain an antioxidant viscose-based graphite felt; Wherein, the preparation method of antioxidant solution is as follows: Mixing melamine and deionized water, stirring and dissolving to obtain a melamine aqueous solution, adding boric acid to deionized water for mixed dissolution to obtain a boric acid aqueous solution, adding the boric acid aqueous solution to the melamine aqueous solution, stirring and reacting, and finally performing a rotary evaporation treatment to obtain a hexagonal boron nitride precursor powder; Ammonium molybdate is added into deionized water for mixed dissolution to obtain an ammonium molybdate aqueous solution; polyvinyl pyrrolidone is added into deionized water for mixed dissolution to obtain a polyvinyl pyrrolidone aqueous solution; the ammonium molybdate aqueous solution and the polyvinyl pyrrolidone aqueous solution are evenly mixed and then added into a hydrochloric acid solution; after irradiating with ultraviolet light, hexagonal boron nitride precursor powder is added and ultrasonic treatment is performed to obtain an antioxidant solution.

2. The production process of an antioxidant viscose-based graphite felt according to claim 1, characterized in that: In step S1, a processing box (20) and a movable frame (30) are also provided on one side of the material discharging frame (10), two fixed frames (40) are provided on the top of the processing box (20), and a first electric slide (50) is provided on one side of the two fixed frames (40), a movable frame (30) is movably provided between the two fixed frames (40), and both sides of the movable frame (30) are respectively connected to one side of the two first electric slides (50), and first servo electric cylinders (60) are also provided on both sides of the bottom of the movable frame (30), and the driving ends of the two first servo electric cylinders (60) are provided with connecting frames (11).

3. The production process of an antioxidant viscose-based graphite felt according to claim 2, characterized in that: Two material discharging racks (10) are arranged below the connecting rack (11), and a rotating rack (12) is arranged on one side of the two material discharging racks (10), a spiral rack (13) is arranged on the opposite side of the two rotating racks (12), and a traction rack (14) is slidably arranged on one side of the spiral rack (13), and a material passing rack (15) is also arranged on the opposite side of the two rotating racks (12).

4. The production process of an antioxidant viscose-based graphite felt according to claim 3, characterized in that: A slide groove (16) is provided on one side of the spiral frame (13), and a rack (17) is provided inside the slide groove (16), a movable block (18) is slidably provided inside the slide groove (16), and a gear (19) is rotatably provided inside the movable block (18), wherein the inside of the gear (19) is driven by a motor, and the surface of the gear (19) is meshed with the surface of the rack (17) for transmission, and the top of the movable block (18) is connected to the bottom of the traction frame (14).

5. The production process of an antioxidant viscose-based graphite felt according to claim 3, characterized in that: The traction frame (14) and the material feeding frame (15) are both composed of a fixed plate (21) and a movable plate (22), and an electromagnet (23) is provided on one side of the fixed plate (21) opposite to the movable plate (22), a connecting plate (24) is provided on both sides of the bottom of the movable plate (22), and a connecting groove (25) matching with the connecting plate (24) is provided on both sides of the top of the fixed plate (21), a first micro-electric cylinder (26) is provided on both sides of the inside of the material discharging frame (10), and the driving ends of the two first micro-electric cylinders (26) are connected to the bottom of the connecting frame (11), one side of the rotating frame (12) located on the left side extends to the left side of the material discharging frame (10), and a card slot is provided on one side of the rotating frame (12), and a pre-treatment tank (31), an anti-oxidation treatment tank (32) and a cleaning and drying treatment tank (33) are provided in sequence from left to right inside the processing box (20).

6. The production process of an antioxidant viscose-based graphite felt according to claim 5, characterized in that: Both sides of the inner wall of the pre-treatment tank (31), the antioxidant treatment tank (32) and the cleaning and drying treatment tank (33) are provided with driving components, and the driving components include a driving frame (41). Both sides of the inner wall of the pre-treatment tank (31), the antioxidant treatment tank (32) and the cleaning and drying treatment tank (33) are provided with a second micro-electric cylinder (42), and the driving end of the second micro-electric cylinder (42) is provided with a driving frame (41). A card block (43) is provided inside the driving frame (41) for rotation, and one side of the card block (43) cooperates with a card slot on one side of the rotating frame (12). A servo motor (44) is provided inside the processing box (20), and one end of the output shaft of the servo motor (44) is provided with a connecting column (45), and one end of the connecting column (45) is slidably connected to one side of the card block (43).

7. The production process of an anti-oxidation viscose-based graphite felt according to claim 6, characterized in that: An air duct (34) is also provided on one side of the front of the processing box (20), and one end of the air duct (34) extends to the interior of the cleaning and drying processing tank (33). A water inlet pipe (35) and a water outlet pipe (36) are also provided on the front of the processing box (20). Three groups of the water inlet pipe (35) and the water outlet pipe (36) are provided on the front of the processing box (20), and one end of the three groups of water inlet pipes (35) and water outlet pipes (36) respectively extend to the interior of the pre-treatment tank (31), the antioxidant treatment tank (32) and the cleaning and drying processing tank (33). A sealing groove (37) is provided inside the processing box (20), and a second electric slide (38) is provided on both sides of the inner wall of the sealing groove (37), and a sealing plate (39) is provided on one side of the second electric slide (38).

8. An anti-oxidation viscose-based graphite felt, characterized in that: The antioxidant viscose-based graphite felt is produced by the production process of the antioxidant viscose-based graphite felt described in any one of claims 1-7.

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