Membrane material joule heat heating equipment

Abstract

The invention discloses Joule heat heating equipment for a membrane material. The equipment at least comprises an unwinding roller used for unwinding a film material, a plurality of heating roller sets used for heating the film material and a winding roller used for winding the film material. The heating roller group comprises a first electrifying roller and a second electrifying roller which are used for applying pressure to the film material and providing Joule heat, and the first electrifying roller and the second electrifying roller are connected with a power supply. The number of the heating roller sets can be set according to practical requirements, and the pressure, voltage and heating time of the heating roller sets are adjusted, so that the requirements of different film materials for Joule heat heating are met, and automation of Joule heat shock preparation is achieved.

Description

Technical Field

[0001] This invention relates to Joule heating equipment, and more particularly to a Joule heating equipment for membrane materials. Background Technology

[0002] The heater is an indispensable component in the reaction chamber of a high-temperature thermal shock synthesis apparatus. Besides the most widely used freestanding conductive carbon substrate heater, several other heaters have recently been developed for high-temperature thermal shock heating devices. Examples include a cylindrical quartz tube heater between two copper electrodes and a sandwich-like heater with two highly flexible carbon ribbons. However, existing devices suffer from cumbersome operation and low preparation efficiency. Summary of the Invention

[0003] To address the above problems, this invention provides a Joule heating device for membrane materials.

[0004] The present invention provides the following technical solution: a Joule heating device for membrane materials, comprising at least an unwinding roller for unwinding the membrane material, a plurality of heating roller groups for heating the membrane material, and a winding roller for winding the membrane material; the heating roller group includes a first energized roller and a second energized roller that apply pressure to the membrane material and provide Joule heat, the first energized roller and the second energized roller being connected to a power source.

[0005] By controlling the distance between the electrified roller groups, programmable pressure can be applied to the film. For example, if the film is initially thick, to avoid the first and second electrified rollers being too close together to pass through or the film being crushed, the distance between subsequent electrified roller groups can be gradually shortened, thereby gradually narrowing the film, increasing the film's density, and further improving the film's conductivity, mechanical strength, and other properties, as well as its resistance to puncture and cutting.

[0006] Furthermore, it also includes several cooling roller groups for cooling the membrane material, the cooling roller groups including a first cooling roller and a second cooling roller.

[0007] Furthermore, the first cooling roller and the second cooling roller have hollow cavities, and the hollow cavities contain a cooling medium.

[0008] Furthermore, the cooling medium is water, oil, liquid nitrogen, argon, or nitrogen.

[0009] Furthermore, the cooling medium is connected to a cooling medium source via a pipeline, thereby forming a circulation.

[0010] Furthermore, the distance between the first and second energized rollers is adjustable, thereby changing the pressure on the membrane material.

[0011] Furthermore, the distance between adjacent heating roller groups is adjustable, thereby changing the tension of the membrane material between adjacent heating roller groups.

[0012] Furthermore, the heating roller assembly and the cooling roller assembly are mounted on a threaded rod, and their positions are changed by rotating the threaded rod.

[0013] The beneficial effects of this invention are as follows: This application allows for the setting of the number of heating roller groups according to practical needs, and by adjusting the pressure, voltage, and heating time of the heating roller groups, it can meet the Joule heating requirements of different film materials, thereby achieving automation of Joule thermal shock preparation with high preparation efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the device structure in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the heating roller assembly and cooling roller assembly installed on the threaded rod according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the device structure in Embodiment 2 of the present invention. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0016] The Joule heating device for membrane materials of the present invention is simple to use and has high preparation efficiency.

[0017] The embodiments of the present invention will be further described below with reference to several examples.

[0018] Example 1 like Figure 1 A Joule heating device for membrane materials includes an unwinding roller 1 for unwinding the membrane material, three heating roller groups 2 for heating the membrane material, and a winding roller 3 for winding the membrane material; the heating roller group 2 includes a first energized roller 2-1 and a second energized roller 2-2 that apply pressure to the membrane material and provide Joule heat, and the first energized roller 2-1 and the second energized roller 2-2 are connected to a power supply 5.

[0019] It also includes a cooling roller assembly 4 for cooling the membrane material, the cooling roller assembly 4 including a first cooling roller 4-1 and a second cooling roller 4-2.

[0020] The first cooling roller 4-1 and the second cooling roller 4-2 have hollow cavities, and the hollow cavities contain cooling media.

[0021] In this embodiment, the cooling medium is water. In some embodiments, oil, liquid nitrogen, argon, or nitrogen may also be used.

[0022] The cooling medium is connected to the cooling medium source 6 through a pipeline, thereby forming a circulation.

[0023] like Figure 2 The distance between the first energized roller 2-1 and the second energized roller 2-2 is adjustable, thereby changing the pressure on the membrane material.

[0024] The distance between adjacent heating roller groups 2 is adjustable, thereby changing the tension of the membrane material between adjacent heating roller groups 2.

[0025] Heating roller assembly 2 and cooling roller assembly 4 are mounted on threaded rod 7, and their positions are changed by rotating threaded rod 7.

[0026] To prepare high-strength carbon nanotube fiber narrow strips, three heating roller groups 2 and one cooling roller group 4 are set up. The first and second heating roller groups 2 are arranged with one high and one low position to achieve a fiber tension of 0.5N. The second and third heating roller groups 2 are also arranged with one high and one low position to achieve a carbon nanotube narrow strip tension of 0.5N. The heating rollers 2 have no pressure setting, while the cooling rollers 4 are designed with a narrower spacing than the narrow strip to apply a certain pressure to it. If the narrow strip thickness is 50 micrometers, the spacing of the cooling rollers 4 can be adjusted between 40 and 25 micrometers. If the roller spacing is uncontrollable, a polytetrafluoroethylene film can be inserted to increase the thickness and apply a certain pressure to the narrow strip.

[0027] Adjust the current and voltage, set the current between the first and second heating rollers to 0.06A, the heating time to 10 seconds, and the heating temperature to 250 degrees Celsius.

[0028] Between the second and third sets of heating rollers, the design current is 0.35A, the temperature is 1600 degrees Celsius, and the heating time is 8 seconds.

[0029] After being heated, the narrow carbon nanotube strips are cooled by a cooling roller. The spacing of the cooling roller is adjusted to apply pressure to the narrow strips, which can further densify them and improve the mechanical properties of the material.

[0030] The treated narrow ribbons can have twice the mechanical properties of their original form. Twisting further enhances their mechanical properties, allowing them to be processed into carbon nanotube fibers.

[0031] Example 2 like Figure 3 A Joule heating device for membrane materials includes an unwinding roller 1 for unwinding the membrane material, a group of seven heating rollers 2 for heating the membrane material, and a winding roller 3 for winding the membrane material; the heating roller group 2 includes a first energized roller 2-1 and a second energized roller 2-2 that apply pressure to the membrane material and provide Joule heat, and the first energized roller 2-1 and the second energized roller 2-2 are connected to a power supply 5.

[0032] It also includes a cooling roller assembly 4 for cooling the membrane material, the cooling roller assembly 4 including a first cooling roller 4-1 and a second cooling roller 4-2.

[0033] The first cooling roller 4-1 and the second cooling roller 4-2 have hollow cavities, and the hollow cavities contain cooling media.

[0034] In this embodiment, the cooling medium is water. In some embodiments, oil, liquid nitrogen, argon, or nitrogen may also be used.

[0035] The cooling medium is connected to the cooling medium source 6 through a pipeline, thereby forming a circulation.

[0036] like Figure 2 The distance between the first energized roller 2-1 and the second energized roller 2-2 is adjustable, thereby changing the pressure on the membrane material.

[0037] The distance between adjacent heating roller groups 2 is adjustable, thereby changing the tension of the membrane material between adjacent heating roller groups 2.

[0038] Heating roller assembly 2 and cooling roller assembly 4 are mounted on threaded rod 7, and their positions are changed by rotating threaded rod 7.

[0039] The heating rollers have no pressure setting, and the cooling rollers are designed with a narrower gap than the narrow strip, thus applying a certain amount of pressure to the narrow strip. If the narrow strip thickness is 50 micrometers, the cooling roller gap can be adjusted between 40-25 micrometers. If the roller gap is uncontrollable, a PTFE film can be inserted to increase the thickness and apply a certain amount of pressure to the narrow strip. A composite film was prepared by embedding pristine silicon microparticles (approximately 2 µm) into a reduced graphene oxide (RGO) matrix. Heating rollers 1, 2, 3, 4, 5, 6, and 7 were energized with a current of 1000A and a voltage of 24V. The temperature of the composite film was controlled at 1800K using a PLC system and selected temperature control mode. Seven rollers were used in this case. Due to the non-uniform resistance of the film and the inherent properties of Joule heating, the material heats from the center outwards. Excessive length would result in poor heating uniformity; therefore, a single heating length should not exceed 10 cm. Multiple heating rollers significantly improve the uniformity of the heating effect. Furthermore, heating a 10 cm sample requires 30 seconds with only two heating rollers, but with seven rollers, each roller only needs 5 seconds, increasing the heating efficiency by six times and improving production efficiency. After heating, the film is cooled by cooling rollers. The tension per unit width of the film is set to 1 kg / m. The heating rollers have no pressure setting, while the cooling rollers are designed with a narrower gap than the film, thus applying pressure to the film. If the film thickness is 0.1 cm, the cooling roller gap can be adjusted to 0.08 cm. If the roller gap is uncontrollable, a polytetrafluoroethylene (PTFE) film can be inserted to increase the thickness and apply pressure to the narrow strip. The specific pressure needs to be determined by the material properties and thickness. After processing, in-situ converted silicon nanoparticles are obtained. Measurements show that the silicon nanoparticles have a diameter of approximately 10 nm, which is much smaller than the initial diameter of 2 µm, greatly improving the material properties.

[0040] This method can also be used to prepare tin or aluminum nanomaterials, and has strong versatility.

[0041] This roller-to-roll thermal shock treatment can convert SiMPs into SiNPs in situ and uniformly disperse them in the RGO matrix, while maintaining the flexibility of the RGO film. Furthermore, this RGO-SiNPs film can be used as a high-performance lithium-ion battery anode.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A Joule heating device for membrane materials, characterized in that, It includes at least an unwinding roller for unwinding the membrane material, a plurality of heating roller groups for heating the membrane material, and a winding roller for winding the membrane material; the heating roller groups include a first energized roller and a second energized roller that apply pressure to the membrane material and provide Joule heat, and the first energized roller and the second energized roller are connected to a power source.

2. The Joule heating device for membrane materials according to claim 1, characterized in that, It also includes several cooling roller sets for cooling the membrane material, the cooling roller sets including a first cooling roller and a second cooling roller.

3. The Joule heating device for membrane materials according to claim 2, characterized in that, The first cooling roller and the second cooling roller have hollow cavities, and the hollow cavities contain cooling media.

4. The Joule heating device for membrane materials according to claim 3, characterized in that, The cooling medium is water, oil, liquid nitrogen, argon, or nitrogen.

5. The Joule heating device for membrane materials according to claim 3, characterized in that, The cooling medium is connected to a cooling medium source through a pipeline, thereby forming a circulation.

6. The Joule heating device for membrane materials according to claim 1, characterized in that, The distance between the first and second energized rollers is adjustable, thereby changing the pressure on the membrane material.

7. The Joule heating device for membrane materials according to claim 1, characterized in that, The distance between adjacent heating roller groups is adjustable, thereby changing the tension of the membrane material between adjacent heating roller groups.

8. The Joule heating device for membrane materials according to claim 6, characterized in that, The heating roller assembly and cooling roller assembly are mounted on a threaded rod, and their positions are changed by rotating the threaded rod.

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