Production device for growing CNT on surface of carbon fiber

Abstract

The invention discloses a production device for growing CNT on the surface of carbon fiber. The production device comprises a machine base, and an unwinding device, a yarn guide device, a desizing drying oven device, an electrophoretic deposition device, a dipping catalysis device, a circulating drying device, a vertical growth CNT device, a traction device and a winding device which are sequentially arranged on the machine base in the carbon fiber yarn conveying direction. The production device provided by the invention can solve the problems existing in the field of micro-nano multi-scale carbon fibers and high-damage-resistance composite materials thereof, so that continuous, efficient and reliable growth of CNT on the surfaces of the carbon fibers is realized.

Description

Technical Field

[0001] The invention belongs to the field of carbon fiber material production equipment, and in particular relates to a production equipment for growing CNT on the surface of carbon fiber. Background Art

[0002] Carbon fiber reinforced resin-based composites have the characteristics of high specific strength, high specific modulus, and strong designability, and are widely used in aerospace structural components. The amount of advanced carbon fiber composites used in aircraft structures has become a symbol of the advancement of aircraft. However, due to the smooth surface of carbon fiber and the weak interface bonding performance between carbon fiber and resin matrix, the interlaminar performance of carbon fiber composites is weak and the impact resistance is poor. After being subjected to impact loads, delamination failure is easy to occur, which affects its service performance. In order to solve the problems of weak interlaminar bonding performance and poor interface toughness of carbon fiber reinforced resin-based composites, researchers have developed methods such as Z pinning, stitching, and three-dimensional weaving to improve the interlaminar bonding strength and toughness of composite laminates. However, these methods also inevitably weaken the in-plane performance of carbon fiber composite laminates because these reinforcement materials with a diameter of hundreds of microns inserted in the perpendicular direction of the reinforcing fibers introduce defects into the composite material.

[0003] Introducing nano-reinforced fillers (such as graphene, carbon nanotubes, etc.) on the surface of carbon fiber to construct micro-nano multi-scale reinforcements, and by improving the mechanical meshing between carbon fiber and resin matrix, constructing a toughened nano-reinforced interface is also an effective way to improve the interlayer bonding strength and increase the interlayer toughness of carbon fiber reinforced resin-based composites. Chemical grafting and chemical vapor deposition (CVD) are the most commonly used methods to introduce graphene and carbon nanotubes (CNT) on the surface of carbon fiber. However, the chemical grafting method has a cumbersome process and a small amount of processing, and is only suitable for small-scale laboratory preparation for experimental research; and the CVD method, although it can be grown in batches, has a large energy consumption and requires expensive special equipment and reagents, and is not suitable for large-scale growth and application. In addition, chemical grafting and CVD methods will also introduce defects on the surface of carbon fiber, weakening the bulk strength of the carbon fiber.

[0004] Patent document CN202410089415 discloses a metal cation functionalized carbon / carbon wear-resistant composite material and its preparation method and recovery method. First, CNTs are grown on the surface of carbon fibers by chemical vapor deposition, and then the carbon fiber fabric with CNTs grown on the surface is immersed in a cation-rich solution to obtain a metal cation functionalized CNT-CFC reinforcement; then a PHT precursor solution containing indole side chains is prepared by a high-temperature closed-loop reaction, and a metal cation functionalized carbon / carbon wear-resistant composite material is obtained by a melt impregnation method; the metal cation functionalized CNT-CFC reinforcement has excellent toughness. After impregnation, the metal cation functionalized CNT-CFC forms a non-covalently bonded, mutually entangled network structure through cations and indole groups, and a three-dimensional mesh CNT structure to give In-PHT-X@CNT-CFC a higher mechanical strength, so that it can avoid interface debonding damage under harsh conditions such as high speed and heavy load.

[0005] Patent document CN117024165A discloses a cross-scale toughened carbon / carbon composite material and a preparation method thereof. The cross-scale toughened carbon / carbon composite material includes a carbon fiber preform, SiC nanowires radially grown in situ on the carbon fiber surface of the carbon fiber preform, and carbon nanotubes randomly grown in situ on the growth direction of the SiC nanowire surface, and the carbon fiber preform on which the radial SiC nanowires-carbon nanotubes are grown isothermal chemical vapor infiltration densification treatment. Summary of the invention

[0006] The purpose of the present invention is to provide a production device for growing CNTs on the surface of carbon fiber, which can solve the problems existing in the field of micro-nano multi-scale carbon fibers and their highly damage-resistant composite materials, thereby realizing continuous, efficient and reliable growth of CNTs on the surface of carbon fiber.

[0007] In order to achieve the purpose of the present invention, the following technical solution is provided: A production device for growing CNTs on the surface of carbon fiber, comprising a machine base, and an unwinding device, a yarn guiding device, a desizing oven device, an electrophoretic deposition device, an impregnation catalytic device, a circulating drying device, a vertical CNT growth device, a traction device and a winding device which are sequentially arranged on the machine base along the conveying direction of the carbon fiber yarn; The unwinding device is used to install the carbon fiber yarn bobbin and release the carbon fiber yarn at a constant tension; The yarn guiding device is used to adjust the left and right deviation of the carbon fiber yarn in the conveying direction; The desizing oven device is used to perform a baking and desizing treatment on the carbon fiber yarn; The electrophoretic deposition device is used to electrophoretically deposit GO on the carbon fiber yarn that has completed the baking and desizing treatment; The impregnation catalysis device is used to perform impregnation catalysis on the carbon fiber yarn after electrophoretic deposition of GO; The circulating drying device is used to heat and dry the carbon fiber yarn that has been impregnated with catalysis; The vertical CNT growth device comprises a split upper furnace body and a lower furnace body, a pair of auxiliary guide wheels for adjusting the horizontal entry of carbon fiber yarns into the upper furnace body are arranged on both sides of the upper furnace body, an upper electrode plate assembly located above the carbon fiber yarns is arranged on the top of the upper furnace body, and a flame spray gun assembly for vertically baking the carbon fiber yarns and a lower electrode plate assembly located below the flame spray gun assembly are arranged on the lower furnace body, and a vertical magnetic field perpendicular to the conveying direction of the carbon fiber yarns is formed by the upper electrode plate assembly and the lower electrode plate assembly during the baking process; The traction device is used to provide driving force to guide the carbon fiber yarn to pass through each device at a uniform speed; The winding device is used for the carbon fiber yarn in the wiring and winding preparation process.

[0008] The present invention is based on growing CNTs on the carbon fiber surface based on a flame method to construct a micro-nano multi-scale carbon fiber reinforcement, and by adding an electric field to guide the vertical growth of CNTs on the carbon fiber surface, thereby realizing the controllable growth of CNTs on the carbon fiber surface in batches.

[0009] Specifically, the unwinding device includes an unwinding frame mounted on a machine base and an unwinding roller with a resistance spring installed therein, the unwinding frame is provided with a first lifting track, the unwinding roller is provided with a sliding structure that slides with the lifting track, the unwinding roller is used to install the carbon fiber yarn bobbin, and the rotational resistance of the unwinding roller is controlled by the resistance spring.

[0010] Specifically, the yarn guiding device includes a yarn guide frame mounted on a machine base and a yarn guide seat across the carbon fiber yarn conveying direction, the yarn guide frame is provided with a second lifting track, the yarn guide seat slides with the second lifting track, the yarn guide seat is provided with a linear slide groove across the carbon fiber yarn conveying direction and parallel yarn guide rollers, the fixed axis of the yarn guide roller is assembled with the linear slide groove, there are multiple yarn guide rollers, and the multiple yarn guide rollers adjust the distance between two adjacent yarn guide rollers through the linear slide groove.

[0011] Specifically, it also includes a yarn passing device for adjusting the carbon fiber yarn delivery height to adapt to the next device, the yarn passing device includes a first yarn passing assembly located between the unwinding device and the yarn guiding device, a second yarn passing assembly located between the yarn guiding device and the desizing oven device, a third yarn passing assembly located between the impregnation catalytic device and the circulating drying device, a fourth yarn passing assembly located between the circulating drying device and the vertical growth CNT device, and a fifth yarn passing assembly located between the vertical growth CNT device and the traction device.

[0012] Specifically, the desizing oven device uses an infrared heating plate to perform a baking and desizing treatment on the carbon fiber yarn.

[0013] Specifically, the electrophoretic deposition device includes an electrophoretic deposition tank, and a first guide wheel group, an annular electrode assembly and a second guide wheel group located in the electrophoretic deposition tank and arranged along the conveying direction of the carbon fiber yarn.

[0014] Specifically, the impregnation catalytic device includes an impregnation catalytic tank, a third guide wheel group and a fourth guide wheel group arranged in sequence along the forward direction of the carbon fiber yarn, and an impregnation catalytic tank cover installed above the impregnation catalytic tank. All device materials are made of organic glass insulating material and are used to impregnate catalysts on fibers treated with electrophoretic deposition of GO.

[0015] Specifically, the circulating drying device includes an oven body, a front door panel for feeding, a rear door panel for discharging, a first upper flip cover plate, a second upper flip cover plate, a heater module device, an inner roller group device, a circulating exhaust fan, a device and an air guide dehumidification pipe joint installed at the upper end of the oven body, which is used for rapid drying of fibers after impregnation with catalysis.

[0016] Specifically, the upper electrode plate assembly includes an upper electrode adjustment plate arranged on the outer side of the top of the upper furnace body, and an upper electrode plate arranged parallel to the upper electrode adjustment plate and located on the inner side of the top of the upper furnace body. The upper electrode adjustment plate and the upper electrode plate are connected by a first connecting rod passing through the upper furnace body. The upper electrode adjustment plate is equipped with an upper adjustment slide that drives the upper electrode adjustment plate to perform lifting and lowering movements.

[0017] Specifically, the upper electrode plate is connected to the positive electrode of the DC power supply.

[0018] Specifically, the lower electrode plate assembly includes a lower electrode adjustment plate arranged on the outer side of the bottom of the lower furnace body, and a lower electrode plate arranged parallel to the lower electrode adjustment plate and located on the inner side of the bottom of the lower furnace body. The lower electrode adjustment plate and the lower electrode plate are connected by a second connecting rod passing through the lower furnace body. The lower electrode adjustment plate is equipped with a lower adjustment slide that drives the lower electrode adjustment plate to perform lifting and lowering movements.

[0019] Specifically, the lower electrode plate is connected to the negative electrode of the DC power supply.

[0020] Specifically, the traction device includes a traction seat plate and a plurality of traction roller mechanisms arranged in sequence along the conveying direction of the carbon fiber yarn. The traction roller mechanism that first contacts the carbon fiber yarn is driven by a servo motor, and then every two adjacent traction roller mechanisms are cross-connected end to end by a synchronous belt.

[0021] Specifically, the flame spray gun assembly includes a flame spray gun, a flame spray gun fixed on a flame spray gun regulating slide mechanism, and a gas cylinder connected to the flame spray gun through a hose, and the gas cylinder is also provided with a regulating flow valve switch.

[0022] Specifically, the flame spray gun assembly is also equipped with a flame temperature measuring device, which includes a temperature measuring probe, a probe bracket, and a temperature measuring bracket slide device for adjusting the height position of the temperature measuring probe.

[0023] Specifically, the winding device includes a winding force control device, a servo wire arrangement and patterning device, and a servo constant tension winding roller device.

[0024] Compared with the prior art, the present invention has the following beneficial effects: By pre-depositing graphene oxide, direct etching of the catalyst on the carbon fiber surface during the CNT growth process is avoided; at the same time, the electric field is added to the flame-grown CNT module to achieve vertical growth of CNT on the carbon fiber surface; in addition, during the CNT growth process, automatic deviation correction and unwinding of continuous carbon fibers, uniform impregnation of carbon fibers with catalysts, fast belt dehumidification cycle drying, and constant tension and uniform speed deviation correction and winding are achieved. The whole device has a simple structure and is easy to implement. It can achieve the controllable growth of CNT on the carbon fiber surface continuously, efficiently, reliably, and in batches, and has excellent application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a production device for growing CNTs on the surface of carbon fiber provided in this embodiment; Figure 2 A schematic diagram of the structure of the unwinding device provided in this embodiment; Figure 3 A schematic structural diagram of the first yarn passing assembly provided in this embodiment; Figure 4 A schematic diagram of the structure of the yarn guide device provided in this embodiment; Figure 5 A schematic diagram of the structure of the second yarn passing assembly provided in this embodiment; Figure 6 A schematic diagram of the structure of the desizing oven device provided in this embodiment; Figure 7 A schematic diagram of the structure of the electrophoretic deposition device provided in this embodiment; Figure 8 A schematic diagram of the structure of the electrophoretic deposition tank provided in this embodiment; Fig. 9 A schematic diagram of the structure of the first guide wheel group provided in this embodiment; Fig.10 A schematic diagram of the structure of the annular electrode assembly provided in this embodiment; Fig.11A schematic diagram of the structure of the second guide wheel group provided in this embodiment; Fig.12 A schematic diagram of the structure of the impregnation catalytic device provided in this embodiment; Fig.13 A schematic structural diagram of a third yarn passing assembly provided in this embodiment; Fig.14 A schematic diagram of the structure of the circulating drying device provided in this embodiment; Fig.15 A schematic structural diagram of a fourth yarn passing assembly provided in this embodiment; Fig.16 A schematic diagram of the structure of a vertically growing CNT device provided in this embodiment; Fig.17 A schematic diagram of the structure of the lower furnace body provided in this embodiment; Fig.18 A schematic diagram of the structure of the upper furnace body provided in this embodiment; Fig.19 A schematic diagram of the structure of the flame spray gun assembly provided in this embodiment; Fig. 20 A schematic diagram of the structure of the flame temperature measuring device provided in this embodiment; Fig.21 A schematic structural diagram of a fifth yarn passing assembly provided in this embodiment; Fig. 22 A schematic diagram of the structure of the traction device provided in this embodiment; Fig.23 A winding device provided for this embodiment; In the figure, 1, machine base; 2, unwinding device; 201, unwinding frame; 202, unwinding yarn roller; 203, carbon fiber yarn tube; 3, first yarn passing assembly; 301, first yarn passing roller; 302, first left yarn passing roller bracket; 303, first right yarn passing roller bracket; 4, yarn guiding device; 401, yarn guiding frame; 402, yarn guiding seat; 403, yarn guiding roller; 5, second yarn passing assembly; 501, second yarn passing roller; 502, second left yarn passing roller bracket; 503, second right yarn passing roller bracket; 6, desizing oven device; 601, lower oven body; 602, first hinge; 603, upper oven body; 604, upper far-infrared heating plate; 605, lower far-infrared heating plate; 7, electrophoretic deposition device; 701, electrophoretic deposition tank; 702, first Guide wheel group; 7021, first left electrophoresis support plate; 7022, first right electrophoresis support plate; 7023, first upper guide wheel shaft; 7024, first upper guide wheel; 7025, first lower guide wheel shaft; 7026, first lower guide wheel; 703, annular electrode assembly; 7031, annular electrode bracket; 7032, annular electrode; 704, second guide wheel group; 7041, second left electrophoresis support plate; 7042, second right electrophoresis support plate; 7043, second upper guide wheel shaft; 7044, second upper guide wheel; 7045, second lower guide wheel shaft; 7046, second lower guide wheel; 705, electrophoresis deposition tank cover; 8, impregnation catalytic device; 801, impregnation catalytic tank; 802, third guide wheel group; 803 , fourth guide wheel group; 804, impregnation catalytic tank cover; 9, third yarn passing assembly; 901, third yarn passing roller; 902, third left yarn passing roller bracket; 903, third right yarn passing roller bracket; 10, circulation drying device; 1001, oven body; 1002, front door plate for feeding; 1003, rear door plate for discharging; 1004, first upper flip cover plate; 1005, second upper flip cover plate; 1006, heater module device; 1007, inner roller group device; 1008, circulation exhaust fan; 1009, air guide dehumidification pipe joint; 11, fourth yarn passing assembly; 1101, fourth yarn passing roller; 1102, fourth left yarn passing roller bracket; 1103, fourth right yarn passing roller bracket; 12, vertical growth CNT device; 1201, lower furnace body ; 12011, lower furnace cover; 12012, lower electrode plate; 12013, lower electrode adjustment plate; 12014, lower adjustment slide; 12015, negative electrode connection line; 1202, second hinge; 1203, upper furnace body; 12031, upper furnace cover; 12032, upper electrode plate; 12033, upper electrode adjustment plate; 12034, upper adjustment slide; 12035, right yarn inlet limit wheel device; 12036, left yarn outlet limit wheel device; 12037, positive electrode connection line; 1204, flame spray gun assembly; 12041, flame spray gun; 12042, flame spray gun adjustment slide device; 12043, hose; 12044, gas cylinder; 12045, regulating flow valve switch; 1205, flame temperature measuring device;12051, temperature probe; 12052, probe bracket; 12053, temperature bracket slide device; 13, fifth yarn passing assembly; 1301, fifth yarn passing roller; 1302, fifth left yarn passing roller bracket; 1303, fifth right yarn passing roller bracket; 14, traction device; 1401, traction seat plate; 1402, traction roller mechanism; 1403, synchronous belt step; 1404, servo motor; 15, winding device; 1501, winding force control device; 1502, servo line arrangement and patterning device; 1503, servo constant tension winding roller device. ; DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, a production device for growing CNTs on the surface of carbon fiber provided in this embodiment includes a machine base 1, and an unwinding device 2, a yarn guiding device 4, a desizing oven device 6, an electrophoretic deposition device 7, an impregnation catalytic device 8, a circulating drying device 10, a vertical CNT growth device 12, a traction device 14 and a winding device 15 which are sequentially arranged on the machine base 1 along the conveying direction of the carbon fiber yarn.

[0028] A yarn passing device for adjusting the height of the carbon fiber yarn to adapt to the next device is also provided between each device, and the yarn passing device includes a first yarn passing assembly 3 located between the unwinding device 2 and the yarn guiding device 4, a second yarn passing assembly 5 located between the yarn guiding device 4 and the desizing oven device 6, a third yarn passing assembly 9 located between the impregnation catalytic device 8 and the circulating drying device 10, a fourth yarn passing assembly 11 located between the circulating drying device 10 and the vertical growth CNT device 12, and a fifth yarn passing assembly 13 located between the vertical growth CNT device 12 and the traction device 14.

[0029] like Figure 2As shown, it is a schematic diagram of the structure of the unwinding device provided in this embodiment, and the unwinding device 2 includes an unwinding frame 201 mounted on the machine base 1 and an unwinding yarn roller 202 with a resistance spring therein, the unwinding frame 201 is provided with a first lifting rail, and the unwinding yarn roller 202 is provided with a sliding structure that slides with the lifting rail, and the unwinding yarn roller 203 is used to install the carbon fiber yarn tube 203.

[0030] That is, the unwinding yarn roller 202 is installed on the unwinding frame 201 and can be adjusted to slide up and down. The carbon fiber yarn tube 203 is installed on the unwinding yarn roller 202. The internal spring tension of the unwinding yarn roller 202 is controlled to achieve constant tension automatic unwinding.

[0031] like Figure 3 As shown, it is a schematic diagram of the structure of the first yarn passing assembly provided in this embodiment. The first yarn passing group 3 includes a first yarn passing roller 301, a first left yarn passing roller bracket 302 and a first right yarn passing roller bracket 303, which are used to control the yarn height when the carbon fiber yarn tube is unwound.

[0032] like Figure 4 As shown, it is a schematic diagram of the structure of the yarn guiding device provided in this embodiment, and the yarn guiding device 4 includes a yarn guiding frame 401, a yarn guiding seat 402 installed on the yarn guiding frame 401, and four yarn guiding rollers 403 are arranged in sequence along the length direction of the yarn guiding seat 402, which are used to control the left and right directions of the yarn when the carbon fiber yarn tube is unwound.

[0033] like Figure 5 As shown, it is a schematic diagram of the structure of the second yarn passing assembly provided in this embodiment. The second yarn passing assembly 5 includes a second yarn passing roller 501, a second left yarn passing roller bracket 502 and a second right yarn passing roller bracket 503, which are used to control the yarn height before the carbon fiber yarn tube enters the desizing oven device 6.

[0034] like Figure 6 As shown, it is a schematic diagram of the structure of the desizing oven device provided in this embodiment. The desizing oven device 6 includes a lower oven body 601 and an upper oven body 603 connected by a first hinge 602 and capable of flipping the cover. Four groups of upper far-infrared heating plates 604 are installed in sequence along the upper oven body 603, and four groups of lower far-infrared heating plates 605 are installed in sequence along the lower oven body 601, so as to realize rapid high-temperature desizing of carbon fiber yarns.

[0035] like Figure 7 As shown, it is a schematic diagram of the structure of the electrophoretic deposition device provided in this embodiment, and the electrophoretic deposition device 7 includes an electrophoretic deposition tank 701 and an electrophoretic deposition tank cover 705, as well as a first guide wheel group 702, an annular electrode assembly 703 and a second guide wheel group 704 located in the electrophoretic deposition tank 701 and arranged along the conveying direction of the carbon fiber yarn.

[0036] like Figure 8As shown, it is a cross-sectional view of the electrophoretic deposition tank provided in this embodiment. A drain port is provided at the bottom of the electrophoretic deposition tank 701 for releasing the used electrolytic solution, and the material thereof is organic glass insulating material to prevent the annular electrode assembly from being affected by the conductor when it is powered on.

[0037] like Fig. 9 As shown, it is a schematic diagram of the structure of the first guide wheel group provided in this embodiment, which includes a first left electrophoresis support plate 7021, a first right electrophoresis support plate 7022, a first upper guide wheel shaft 7023, a first upper guide wheel 7024, a first lower guide wheel shaft 7025 and a first lower guide wheel 7026, wherein the first lower guide wheel shaft 7025, the first lower guide wheel 7026, the first left electrophoresis support plate 7021, and the first right electrophoresis support plate 7022 are made of organic glass insulating material, and the first upper guide wheel shaft 7023 and the first upper guide wheel 7024 are made of metal 304 material, which is used to connect the negative pole of the power supply to make the fiber yarn conductive.

[0038] like Fig.10 As shown, it is a schematic diagram of the structure of the annular electrode assembly provided in this embodiment, the annular electrode assembly 703 includes an annular electrode bracket 7031, and an annular electrode 7032 installed in the middle of the annular electrode bracket 7031, wherein the annular electrode bracket 7 is made of organic glass insulating material, and the annular electrode 7032 is made of conductive material copper ring, and the positive pole connected to the power supply forms a conductive circuit with the negative pole fiber yarn to react in the electrolytic solution.

[0039] like Fig.11 As shown, it is a schematic diagram of the structure of the second guide wheel group provided in this embodiment, and the second guide wheel group 704 includes a second left electrophoresis support plate 7041, a second right electrophoresis support plate 7042, a second upper guide wheel shaft 7043, a second upper guide wheel 7044, a second lower guide wheel shaft 7045 and a second lower guide wheel 7046, all of which are made of plexiglass insulating material.

[0040] When the carbon fiber yarn after the desizing treatment enters the above-mentioned electrophoretic deposition device 7, the carbon fiber yarn is introduced from the top of the first upper guide wheel 7024, bypasses the bottom of the first lower guide wheel 7026, passes through the annular electrode 7032, and then bypasses the bottom of the second lower guide wheel 7046 in turn, and is led out from the top of the second upper guide wheel 7044.

[0041] In this process, the first lower guide wheel shaft 7025 and the first upper guide wheel 7024 are connected to the negative pole of the power supply to make the carbon fiber yarn conductive, and the annular electrode 7032 is connected to the positive pole of the power supply to form a conductive loop with its carbon fiber yarn, and reacts with the electrolytic solution of the electrophoretic deposition tank 701 to achieve electrophoretic deposition of GO.

[0042] like Fig.12 As shown, it is a schematic diagram of the structure of the impregnation catalytic device provided in this embodiment, wherein the carbon fiber yarn first enters the impregnation catalytic tank 801 around the third guide wheel group 802, and is led out through the fourth guide wheel group 803, and its yarn threading path is similar to the electrophoretic deposition device in the above-mentioned embodiment, and the catalyst is added to the impregnation catalytic tank 801 to perform impregnation catalysis on the fibers treated with electrophoretic deposition GO. In this process, the impregnation catalytic tank 801 is sealed by the impregnation catalytic tank cover 804 to prevent the catalyst from volatilizing or being contaminated by impurities.

[0043] like Fig.13 As shown, it is a schematic diagram of the structure of the third yarn passing assembly provided in this embodiment, which includes a third yarn passing roller 901, a third left yarn passing roller bracket 902, and a third right yarn passing roller bracket 903, which are used to control the yarn height of the carbon fiber yarn tube before entering the circulating drying device.

[0044] like Fig.14 As shown, it is a schematic diagram of the structure of the circulating drying device provided in this embodiment, which includes a drying oven body 1001, a front door panel 1002 for feeding, a rear door panel 1003 for discharging, a first upper flip cover plate 1004, a second upper flip cover plate 1005, a heater module device 1006, an inner roller group device 1007, a circulating exhaust fan 1008, a device and an air guide dehumidification pipe joint 1009 installed at the upper end of the drying oven body 1001, which is used for rapid drying of fibers after impregnation with catalysis.

[0045] Among them, the carbon fiber yarn impregnated with catalyst has humidity, which is quickly dried by the heater module device 1006 and heat exchanged by the circulating exhaust fan 1008. The moisture is discharged outside the oven through the air guide dehumidification pipe joint 1009 installed at the upper end of the oven body 1001. The carbon fiber yarn passes on the top of the inner roller group device 1007 to prevent the carbon fiber yarn from sagging over a long distance.

[0046] like Fig.15 As shown, it is a schematic diagram of the structure of the fourth yarn passing assembly provided in this embodiment, including a fourth yarn passing roller 1101, a fourth left yarn passing roller bracket 1102, and a fourth right yarn passing roller bracket 1103, which are used to control the height of the carbon fiber yarn before entering the vertical growth CNT device.

[0047] like Fig.16 As shown, it is a schematic diagram of the structure of the vertical growth CNT device provided in this embodiment, including a lower furnace body 1201, an upper furnace body 1203 connected to the lower furnace body 1201 through a second hinge 1202, a flame spray gun assembly 1204 and a flame temperature measuring device 1205 installed at the bottom of the lower furnace body 1201, which are used to realize the electric field induced flame growth of CNTs by carbon fiber filaments.

[0048] like Fig.17As shown, it is a schematic diagram of the structure of the lower furnace body provided in this embodiment, including a lower furnace cover 12011, a lower electrode plate 12012, and a lower electrode 12012 plate fixed on a lower electrode adjustment plate 12013 and not connected to the lower furnace cover 12011 with a gap, the lower electrode adjustment plate 12013 is adjusted by a lower adjustment slide 12014 to control and adjust the height of the lower electrode plate 12012, the lower adjustment slide 12014 is fixed at the bottom of the lower furnace cover 12011, and the lower electrode plate 12012 is connected to the negative pole of the DC power supply.

[0049] like Fig.18 As shown, it is a schematic diagram of the structure of the upper furnace body provided in this embodiment, including an upper furnace cover 12031, an upper electrode plate 12032, and the upper electrode plate 12032 is fixed on the upper electrode adjustment plate 12033 and is not connected to the upper furnace cover 12031 with a gap, the upper electrode adjustment plate 12033 is adjusted by the upper adjustment slide 12034 to control the height of the lower upper electrode plate 12032, the upper adjustment slide 12034 is fixed to the upper part of the lower upper furnace cover 12031, and a right yarn feeding limit wheel device 12035 and a left yarn outlet limit wheel device 12036 are also provided on both sides of the upper furnace cover 12031 for controlling the horizontal plane position of the carbon fiber filaments in the furnace, the upper electrode plate is connected to the positive pole of the DC power supply, and in addition, the upper furnace cover 12031 is also provided with a sight glass window to facilitate observation of the reaction situation and position adjustment.

[0050] like Fig.19 As shown, it is a schematic diagram of the structure of the flame spray gun assembly provided in this embodiment, including a flame spray gun 12041, the flame spray gun 12041 is fixed on a flame spray gun adjustment slide device 12042, and a gas cylinder 12044 is connected to the flame spray gun 12041 through a hose 12043, and the gas cylinder 12044 is also provided with a regulating flow valve switch 12045.

[0051] like Fig. 20 As shown, it is a schematic diagram of the structure of the flame temperature measuring device provided in this embodiment, including a temperature measuring probe 12051, a probe bracket 12052, and a temperature measuring bracket slide device 12053, which is used to adjust the height position of the temperature measuring probe 12051.

[0052] Among them, the right yarn inlet limiting wheel device 12035 of the upper furnace body 1203 is passed through the bottom, and then the left yarn outlet limiting wheel device 12036 is led out from the bottom to control the horizontal plane position of the carbon fiber filament in the furnace, the flame spray gun 12041 of the flame spray gun assembly 1204 is turned on, and the regulating flow valve switch 12045 of the gas cylinder 12044 is adjusted to adjust the flame size. The flame height adjustment is carried out by adjusting the upper and lower heights through the flame spray gun adjusting slide device 12042. The flame temperature measuring device 1205 adjusts the upper and lower height positions of the temperature measuring probe through the temperature measuring bracket slide device 12053. The upper electrode plate 12032 is adjusted and controlled by the upper adjustment slide 12034. The lower electrode plate 12012 is adjusted and controlled by the lower adjustment slide 12014.

[0053] like Fig.21 As shown, it is a schematic diagram of the structure of the fifth yarn passing assembly provided in this embodiment, which includes a fifth yarn passing roller 1301, a fifth left yarn passing roller bracket 1302, and a fifth right yarn passing roller bracket 1303, which are used to control the height of the carbon fiber yarn before it enters the traction device.

[0054] like Fig. 22 As shown, it is a schematic diagram of the structure of the traction device provided in this embodiment, including a traction seat plate 1401, and 5 groups of traction roller mechanisms 1402 are arranged in sequence along the direction of the traction seat plate 1401, and are cross-connected end to end through the same belt step 1403 for transmission. The first group of traction roller mechanisms is driven by a servo motor 1404 to realize synchronous transmission of the 5 groups of guide roller mechanisms 1402.

[0055] The yarn passes through the upper and lower roller surfaces of 5 groups of traction roller devices in sequence, and the traction control is achieved through the friction of the carbon fiber yarn on the roller surface and the tension generated by passing through each roller surface. The first group of traction roller devices is driven by a servo motor, and the other 4 groups of traction roller devices are synchronously driven by synchronous belt cross-drive.

[0056] like Fig.23 As shown, the winding device provided in this embodiment includes a winding force control device 1501, a servo wire arrangement and punching device 1502, and a servo constant tension winding roller device 1503.

[0057] Finally, the carbon fiber yarn after vertically growing CNT is wound up. The tension is first controlled by the winding force control device 1501 to achieve winding speed control by the servo constant tension winding roller device 1503. The servo wire arrangement and patterning device 1502 is used for uniform wire arrangement and winding on the winding roller surface.

[0058] In addition, the terms "upper", "lower", "inner", "outer", "front", "rear" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps described in these embodiments do not limit the scope of the present invention.

[0059] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

[0060] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A production device for growing CNT on the surface of carbon fiber, characterized in that: It includes a machine base, and an unwinding device, a yarn guiding device, a desizing oven device, an electrophoretic deposition device, an impregnation catalytic device, a circulating drying device, a vertical CNT growth device, a traction device and a winding device which are sequentially arranged on the machine base along the conveying direction of the carbon fiber yarn; The unwinding device is used to install the carbon fiber yarn bobbin and release the carbon fiber yarn at a constant tension; The yarn guiding device is used to adjust the left and right deviation of the carbon fiber yarn in the conveying direction; The desizing oven device is used to perform a baking and desizing treatment on the carbon fiber yarn; The electrophoretic deposition device is used to electrophoretically deposit GO on the carbon fiber yarn that has completed the baking and desizing treatment; The impregnation catalysis device is used to perform impregnation catalysis on the carbon fiber yarn after electrophoretic deposition of GO; The circulating drying device is used to heat and dry the carbon fiber yarn that has been impregnated with catalysis; The vertical CNT growth device comprises a split upper furnace body and a lower furnace body, a pair of auxiliary guide wheels for adjusting the horizontal entry of carbon fiber yarns into the upper furnace body are arranged on both sides of the upper furnace body, an upper electrode plate assembly located above the carbon fiber yarns is arranged on the top of the upper furnace body, and a flame spray gun assembly for vertically baking the carbon fiber yarns and a lower electrode plate assembly located below the flame spray gun assembly are arranged on the lower furnace body, and a vertical magnetic field perpendicular to the conveying direction of the carbon fiber yarns is formed by the upper electrode plate assembly and the lower electrode plate assembly during the baking process; The traction device is used to provide driving force to guide the carbon fiber yarn to pass through each device at a uniform speed; The winding device is used for the carbon fiber yarn in the wiring and winding preparation process.

2. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The unwinding device includes an unwinding frame mounted on a machine base and an unwinding roller with a resistance spring installed therein, the unwinding frame is provided with a first lifting track, the unwinding roller is provided with a sliding structure that slides with the lifting track, the unwinding roller is used to install a carbon fiber yarn bobbin, and the rotational resistance of the unwinding roller is controlled by the resistance spring.

3. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The yarn guiding device includes a yarn guide frame mounted on a machine base and a yarn guide seat across the carbon fiber yarn conveying direction, the yarn guide frame is provided with a second lifting track, the yarn guide seat slides with the second lifting track, the yarn guide seat is provided with a linear slide across the carbon fiber yarn conveying direction and parallel yarn guide rollers, the fixed shaft of the yarn guide roller is assembled with the linear slide, there are multiple yarn guide rollers, and the multiple yarn guide rollers adjust the distance between two adjacent yarn guide rollers through the linear slide.

4. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: It also includes a yarn passing device for adjusting the carbon fiber yarn delivery height to adapt to the next device, the yarn passing device includes a first yarn passing assembly located between the unwinding device and the yarn guiding device, a second yarn passing assembly located between the yarn guiding device and the desizing oven device, a third yarn passing assembly located between the impregnation catalytic device and the circulating drying device, a fourth yarn passing assembly located between the circulating drying device and the vertical growth CNT device, and a fifth yarn passing assembly located between the vertical growth CNT device and the traction device.

5. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The desizing oven device uses an infrared heating plate to perform a baking and desizing treatment on the carbon fiber yarn.

6. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The electrophoretic deposition device comprises an electrophoretic deposition tank, and a first guide wheel group, a ring electrode assembly and a second guide wheel group which are located in the electrophoretic deposition tank and arranged along the conveying direction of the carbon fiber yarn.

7. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The upper electrode plate assembly includes an upper electrode adjustment plate arranged on the outer side of the top of the upper furnace body, and an upper electrode plate arranged parallel to the upper electrode adjustment plate and located on the inner side of the top of the upper furnace body. The upper electrode adjustment plate and the upper electrode plate are connected by a first connecting rod that passes through the upper furnace body. The upper electrode adjustment plate is equipped with an upper adjustment slide that drives the upper electrode adjustment plate to perform lifting and lowering movements.

8. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The lower electrode plate assembly includes a lower electrode adjustment plate arranged on the outer side of the bottom of the lower furnace body, and a lower electrode plate arranged parallel to the lower electrode adjustment plate and located on the inner side of the bottom of the lower furnace body. The lower electrode adjustment plate and the lower electrode plate are connected by a second connecting rod that passes through the lower furnace body. The lower electrode adjustment plate is equipped with a lower adjustment slide that drives the lower electrode adjustment plate to perform lifting and lowering movements.

9. The production device for growing CNT on the surface of carbon fiber according to claim 1, characterized in that: The traction device includes a traction seat plate and a plurality of traction roller mechanisms arranged in sequence along the conveying direction of the carbon fiber yarn. The traction roller mechanism that first contacts the carbon fiber yarn is driven by a servo motor, and then every two adjacent traction roller mechanisms are cross-connected end to end by a synchronous belt.

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