A graphene conductive film preparation device

Abstract

The present invention relates to graphene conductive film processing, more specifically, a graphene conductive film preparation process, comprising the following steps: step 1: taking a sheet of copper foil and transporting it horizontally through a graphene conductive film preparation device; step 2: stopping horizontal transportation when the position to be processed on the copper foil reaches the processing point; step 3: forming a concave-convex surface on the copper foil by stamping, and then cleaning the copper foil; step 4: preparing a copper-based graphene conductive film by a metal substrate chemical vapor deposition method. The purpose is to enable the substrate to be attached to a heterogeneous structure.

Description

Technical Field

[0001] The invention relates to graphene conductive film processing, and more specifically to a graphene conductive film preparation process. Background Art

[0002] The conductivity of copper-based composite materials tends to decrease, while graphene is a two-dimensional nanomaterial with a single atomic layer. It is an excellent conductive material at room temperature and is considered to be an ideal copper-based composite reinforcement. The common processing method is metal substrate chemical vapor deposition, which includes the delivery of gaseous reactants in a controllable manner through a CVD system, providing a sealed reaction chamber, gas exhaust and reaction pressure control, providing energy for chemical reactions, and finally treating the waste gas to achieve deposition; the process is to deliver the reaction gas to the reactor, directly diffuse through the boundary layer and adsorb onto the copper substrate; or to form intermediate reactants and by-products through gas phase reactions, and deposit them on the substrate through diffusion and adsorption. Surface diffusion and heterogeneous reactions occur on the surface of the substrate before forming a film or coating. Finally, by-products and unreacted substances are desorbed from the surface and forced out of the reactor as waste gas. Its substrate is often a single extended structure, which is not suitable for attachment to a special-shaped structure. Summary of the invention

[0003] The invention provides a graphene conductive film preparation process, the purpose of which is to enable a substrate to be attached to a heterogeneous structure.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A process for preparing a graphene conductive film comprises the following steps:

[0006] Step 1: Take a sheet of copper foil and transport it horizontally through a graphene conductive film preparation device;

[0007] Step 2: The position to be processed on the copper foil reaches the processing point and stops horizontal transportation;

[0008] Step 3: forming a concave-convex surface on the copper foil by stamping, and then cleaning the copper foil;

[0009] Step 4: Prepare a copper-based graphene conductive film using a metal substrate chemical vapor deposition method.

[0010] In the step 1, the sheet copper foil is obtained by extending the rolled copper foil and then cutting it.

[0011] In the step three, a mold is provided at the bottom of the copper foil during the stamping.

[0012] The graphene conductive film preparation device comprises a belt conveyor and a punching mechanism arranged above the belt conveyor.

[0013] The belt conveyor includes a support frame I, four rollers I which are horizontally distributed linearly and are all rotatably connected to the support frame I, and two rollers II which are distributed one above and one below and are all rotatably connected to the support frame I. The two rollers II are located between the four rollers I, and rollers II are lower than rollers I. Conveyor belts are sleeved on the front and rear sides of rollers I and II. There is a gap between the two conveyor belts. The left and right sides of the upper end of the conveyor belt are horizontal end faces. The center of the upper end of the conveyor belt is located between the two rollers II for forming a placement groove. Rollers I and rollers II are driven by motor I to rotate.

[0014] The stamping mechanism includes a lower mold located in the placement groove, an upper mold arranged above the lower mold, a lifting mechanism I for driving the lower mold to rise and fall, and a lifting mechanism II for driving the upper mold to rise and fall.

[0015] The graphene conductive film preparation device further comprises a roller mechanism;

[0016] The roller mechanism includes a base I, a lead screw III rotatably connected to the base I, a round steel fixed to the base I, a base II spirally driven on the lead screw III and slidably connected to the round steel, two support rods slidably connected to the base II, the free ends of the support rods are fixedly connected to the limited portion, a motor seat is slidably connected to the support rods, a compression spring is sleeved on the support rods, the two ends of the compression spring are respectively in contact with the motor seat and the base II, a motor II is fixedly connected to the motor seat, a friction wheel is fixedly connected to the output shaft of the motor II, and also includes a shaft rotatably connected to the support frame I, a roller III fixedly connected to the shaft and located between the two conveyor belts, and a friction transmission member fixedly connected to one end of the shaft, the friction transmission member is in a cone shape, and the friction transmission member and the friction wheel are frictionally transmitted;

[0017] The roller mechanism is provided with two rollers, one on the left and one on the right. The roller III on the left rotates clockwise, and the roller III on the right rotates counterclockwise. The two rollers III are respectively located on the left and right sides of the placement groove.

[0018] The lifting mechanism I includes a support frame II, and the front and rear ends of the support frame II are each rotatably connected to a lead screw I. The bottoms of the two lead screws I are synchronously driven by a pulley and belt assembly, and one of the lead screws I is driven to rotate by a motor III, and the front and rear ends of the adjustment seat are spirally driven on the two lead screws I; the lifting mechanism II includes two lead screws II that are respectively rotatably connected to the support frame II, and the bottoms of the two lead screws II are synchronously driven by a pulley and belt assembly II, and one of the lead screws II is driven to rotate by a motor IV.

[0019] When the position sensor detects that the upper end surface of the lower mold is higher than the upper end surface of the conveyor belt, the motor II is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A process flow for preparing a graphene conductive film Figure 1 ;

[0021] Figure 2 Process flow for preparing graphene conductive film Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the overall structure of a graphene conductive film preparation device;

[0023] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0024] Figure 5 It is a structural schematic diagram of a belt conveyor;

[0025] Figure 6 It is a structural schematic diagram of the stamping mechanism;

[0026] Figure 7 and 8 It is a partial structural schematic diagram of the stamping mechanism;

[0027] Fig. 9 It is a schematic diagram of the structure of base I, screw III, base II, support rod and friction wheel. DETAILED DESCRIPTION

[0028] A process for preparing a graphene conductive film comprises the following steps:

[0029] refer to Figure 1 and Figure 2 , step 1: take the rolled copper foil, unfold it to a horizontal position, and obtain a sheet of copper foil by cutting; transport the sheet of copper foil horizontally through a graphene conductive film preparation device;

[0030] The graphene conductive film preparation device includes a belt conveyor, referring to Figure 3 and 5, the belt conveyor includes a support frame Ⅰ11, four rollers Ⅰ12 which are horizontally linearly distributed and rotatably connected to the support frame Ⅰ11, and the front ends of the rollers Ⅰ12 can be synchronously driven by the pulley belt assembly in pairs, and also includes two rollers Ⅱ13 which are distributed one above and one below and rotatably connected to the support frame Ⅰ11, and the rotation direction of the roller Ⅱ13 located above is opposite to that of the roller Ⅰ12, and the two rollers Ⅱ13 are located between the four rollers Ⅰ12, and the roller Ⅱ13 is lower than the roller Ⅰ12, and the front and rear sides of the rollers Ⅰ12 and Ⅱ13 are both sleeved with a conveyor belt 15, and the conveyor belt 15 rotates clockwise, and the left and right sides of the upper end of the conveyor belt 15 are horizontal end faces, and the center of the upper end of the conveyor belt 15 is located between the two rollers Ⅱ13 to form a placement groove, and the roller Ⅰ12 is driven by the motor Ⅰ to realize rotation, and the output shaft of the motor Ⅰ can be directly fixed to one of the rollers Ⅰ12, and the motor Ⅰ is installed on the support frame Ⅰ11;

[0031] The conveyor belt 15 is used to convey the sheet copper foil, and the location of the placement slot is the processing point.

[0032] Step 2: When the position to be processed on the copper foil reaches the processing point, the conveyor belt 15 stops rotating to stop horizontal transportation;

[0033] Step 3: Reference Figure 6 The stamping mechanism includes a lower mold 33 located in the placement groove, an upper mold 41 arranged directly above the lower mold 33, a lifting mechanism I driving the lower mold 33 to rise and fall, and a lifting mechanism II driving the upper mold 41 to rise and fall. When the lower mold 33 rises and is higher than the conveyor belt 15, the upper mold 41 descends and presses down the copper foil to fit the lower mold 33 to complete the stamping.

[0034] Among them, the lifting mechanism I includes a support frame II14, and the front and rear ends of the support frame II14 are respectively rotatably connected to a vertical screw I31, the two screws I31 have the same spiral rotation direction, and the bottoms of the two screws I31 are synchronously driven by a pulley belt assembly 34, the top of one of the screws I31 is fixedly connected to the output shaft of the motor III, the motor III is fixedly connected to the support frame II14, and the front and rear ends of the adjustment seat 32 are spirally driven on the two screws I31; the lifting mechanism II includes two vertical screws II42 respectively rotatably connected to the support frame II14, the two screws II42 have the same spiral rotation direction, and the bottoms of the two screws II42 are synchronously driven by a pulley belt assembly II43, one of the screws II42 is fixedly connected to the output shaft of the motor IV, the motor IV is fixedly connected to the support frame II14, and the front and rear ends of the upper mold 41 are spirally driven on the two screws II42, the screw I31 rotates to drive the adjustment seat 32 to rise and fall, and the screw II42 rotates to drive the upper mold 41 to rise and fall.

[0035] Step 4: Prepare a special-shaped copper-based graphene conductive film using a metal substrate chemical vapor deposition method.

[0036] The graphene conductive film preparation device further comprises a roller mechanism;

[0037] Among them, reference Fig. 9 The roller mechanism includes a base Ⅰ51, a lead screw Ⅲ52 rotatably connected to the base Ⅰ51, a round steel fixed to the base Ⅰ51, a base Ⅱ53 spirally driven on the lead screw Ⅲ52 and slidably connected to the round steel, two support rods 54 are slidably connected to the base Ⅱ53, the free end of the support rod 54 is fixedly connected to the limited portion, the lead screw Ⅲ52 is fixedly connected to the output shaft of the motor to achieve rotation, the motor is fixedly connected to the rear end of the base Ⅰ51, the support rod 54 is slidably connected to the motor seat, the support rod 54 is sleeved with a compression spring, the two ends of the compression spring are respectively in contact with the motor seat and the base Ⅱ53, the motor seat is fixedly connected to the motor II, the output shaft of the motor II is fixedly connected to the friction wheel 55, and also includes a shaft 21 rotatably connected to the support frame Ⅰ11, fixedly connected to the shaft 21 and located between the two conveyor belts 15 The roller III 22 between the two ends of the shaft 21 is fixedly connected to a friction transmission member 23, which is in the shape of a cone. The friction transmission member 23 and the friction wheel 55 are frictionally transmitted. The axis of the friction transmission member 23 extends forward and backward, and the rotation of the lead screw III 52 drives the friction wheel 55 forward and backward to adjust the rotation speed of the friction transmission member 23, in order to change the rotation speed of the roller III 22. The rotation speed is changed according to the contraction speed of the copper foil when it is deformed. When the contraction speed increases, the rotation speed of the roller III 22 is increased, and when the contraction speed decreases, the rotation speed of the roller III 22 is reduced. When the position sensor detects that the upper end surface of the lower mold 33 is higher than the upper end surface of the conveyor belt 15, the motor II is started, and the relative position of the friction transmission member 23 and the friction wheel 55 is controlled by detecting the movement speed of the upper mold 41 and the lower mold 33 or the contraction speed of the copper foil through the speed sensor;

[0038] The roller mechanism is provided with two rollers, one on the left and one on the right. Figure 3 Only the roller mechanism on the left side is visible. The roller III22 on the left side rotates clockwise, and the roller III22 on the right side rotates counterclockwise. The two rollers III22 are respectively located on the left and right sides of the placement groove; when the copper foil is deformed, the left and right sides of the copper foil shrink toward the processing point, and the roller III22 on the left side rotates clockwise, and the roller III22 on the right side rotates counterclockwise to drive the synchronous left and right sides to move toward the middle, thereby realizing adaptive transportation.

Claims

1. A graphene conductive film preparation device, comprising: A belt conveyor, comprising a support frame I (11), four rollers I (12) which are horizontally linearly distributed and rotatably connected to the support frame I (11), and two rollers II (13) which are distributed one above the other and rotatably connected to the support frame I (11), the two rollers II (13) being located between the four rollers I (12), and the rollers II (13) being lower than the rollers I (12), the front and rear sides of the rollers I (12) and the rollers II (13) being sleeved with conveyor belts (15), there being a gap between the two conveyor belts (15), the left and right sides of the upper end of the conveyor belt (15) being horizontal end surfaces, the center of the upper end of the conveyor belt (15) being located between the two rollers II (13) for forming a placement groove, and the rollers I (12) and the rollers II (13) being driven by the motor I to achieve rotation; It also includes a stamping mechanism, the stamping mechanism including a lower mold (33) located in the placement groove, an upper mold (41) arranged above the lower mold (33), a lifting mechanism I for driving the lower mold (33) to rise and fall, and a lifting mechanism II for driving the upper mold (41) to rise and fall; The roller mechanism also includes a base I (51), a lead screw III (52) rotatably connected to the base I (51), a round steel fixed to the base I (51), a base II (53) spirally driven on the lead screw III (52) and slidably connected to the round steel, two support rods (54) slidably connected to the base II (53), the free end of the support rod (54) is fixedly connected to the limiting portion, the support rod (54) is slidably connected to the motor seat, the support rod (54) is sleeved with a compression spring, and the compression spring The two ends of the compression spring are in contact with the motor seat and the base II (53) respectively. The motor seat is fixedly connected to the motor II. The output shaft of the motor II is fixedly connected to the friction wheel (55). The compression spring also includes a shaft (21) rotatably connected to the support frame I (11), a roller III (22) fixedly connected to the shaft (21) and located between the two conveyor belts (15), and a friction transmission member (23) fixedly connected to one end of the shaft (21). The friction transmission member (23) is in a cone shape. The friction transmission member (23) and the friction wheel (55) are frictionally driven. The roller mechanism is provided with two rollers, one on the left and one on the right. The roller III (22) on the left rotates clockwise, and the roller III (22) on the right rotates counterclockwise. The two rollers III (22) are respectively located on the left and right sides of the placement groove. When the position sensor detects that the upper end surface of the lower mold (33) is higher than the upper end surface of the conveyor belt (15), the motor II is started, and the speed sensor detects the movement speed of the upper mold (41) and the lower mold (33) or the contraction speed of the copper foil to control the relative position of the friction transmission member (23) and the friction wheel (55); When the copper foil is deformed, the left and right sides of the copper foil shrink toward the processing point, and the roller III (22) located on the left side rotates clockwise, while the roller III (22) located on the right side rotates counterclockwise to drive the left and right sides to move toward the middle synchronously, thereby achieving adaptive transportation.

2. The graphene conductive film preparation device according to claim 1, wherein the lifting mechanism I comprises a support frame II (14), the front and rear ends of the support frame II (14) are rotatably connected to a lead screw I (31), the bottoms of the two lead screws I (31) are synchronously driven by a pulley belt assembly (34), one of the lead screws I (31) is driven to rotate by a motor III, and the front and rear ends of the adjustment seat (32) are spirally driven on the two lead screws I (31); the lifting mechanism II comprises two lead screws II (42) respectively rotatably connected to the support frame II (14), the bottoms of the two lead screws II (42) are synchronously driven by a pulley belt assembly II (43), and one of the lead screws II (42) is driven to rotate by a motor IV.

Images