Continuous processing device and method for conductive polyaniline coating on surface of base material

Abstract

The invention belongs to the technical field of conductive materials, and discloses a continuous processing device and method for a conductive polyaniline coating on the surface of a base material, and the continuous processing device and method are used for processing the conductive polyaniline coating on the surface of the base material. The grounding end of the plasma power supply is connected with a grounding electrode, the grounding electrode and the discharge electrode are arranged in parallel, a gap for a base material to pass through is reserved between the grounding electrode and the discharge electrode, and the DBD plasma processor is used for carrying out hydrophilization and roughening treatment on the surface of the base material; the liquid storage system comprises three liquid storage tanks, and the three liquid storage tanks are filled with an aniline monomer solution, a doped acid solution and an oxidizing agent solution respectively; the problems that in the prior art, the preparation process is complex, and the coating uniformity and conductivity are poor are solved, the processing efficiency and quality of the conductive polyaniline coating are effectively improved, and environment-friendly and shape-controllable continuous production is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of conductive materials, and in particular relates to a device and method for continuously processing a conductive polyaniline coating on a substrate surface. Background Art

[0002] With the rapid development of modern science and technology, conductive materials have been widely used in many fields due to their unique properties; conductive fibers and their fabrics are widely used in electronics, electricity, medical, aviation, aerospace and other industries due to their excellent electrical conductivity, thermal conductivity, shielding and electromagnetic wave absorption functions; conductive materials can be generally divided into metal-based conductive materials, carbon black-based conductive materials, conductive polymer materials and composite conductive materials. Among them, there are two main types of conductive polymer fibers or fabrics. One is conductive polymer fibers and their fabrics made by direct spinning of high molecular conductive polymers such as polyacetylene, polyaniline, polypyrrole, polythiophene, etc.; the other is to obtain conductive polymer fibers or their fabrics by surface modification of ordinary non-conductive chemical fibers or their fabrics; since the direct use of high molecular conductive materials to prepare conductive polymer fibers or their fabrics has the disadvantages of difficulty in spinning and high cost, modification of ordinary chemical fibers is currently one of the main methods for obtaining conductive polymer fibers or fabrics;

[0003] Prior art generally uses a liquid-phase method to modify the surface of ordinary fibers or their fabrics with conductive polymers to form a conductive coating, thereby producing conductive fibers or their fabrics. Taking conductive fibers with polyaniline as the conductive coating as an example, the preparation method is as follows: ordinary fibers are immersed in an acidic medium containing aniline, a swelling agent, and a copper ion catalyst, and then immersed in an oxidant solution before polymerization to obtain conductive fibers. For chemical fibers that are more difficult to modify, such as polyester and acrylic, this method not only consumes a large amount of reagents and generates a large amount of wastewater, but also results in uneven aniline deposition and inconsistent polyaniline particle size and morphology in the coating, which can lead to unsatisfactory coating bonding and conductivity. Therefore, the prior art suffers from a complex preparation process, poor coating uniformity, and poor conductivity. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a device and method for continuously processing a conductive polyaniline coating on a substrate surface, which solves the problems of the prior art such as complex preparation process, poor coating uniformity and poor conductive performance.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for continuously processing a conductive polyaniline coating on a substrate surface, used for processing a conductive polyaniline coating on a substrate surface, comprising:

[0007] A DBD plasma processor includes a plasma power supply, wherein the output end of the plasma power supply is connected to a discharge electrode, and the ground end of the plasma power supply is connected to a ground electrode. The ground electrode and the discharge electrode are placed in parallel, and a gap is left between the ground electrode and the discharge electrode for the substrate to pass through. The DBD plasma processor is used to perform hydrophilic and roughening treatment on the surface of the substrate;

[0008] The liquid storage system includes three liquid storage tanks, each of which is filled with aniline monomer solution, doping acid solution and oxidant solution. The three liquid storage tanks are connected to a delivery pipe, and the delivery pipe is provided with a flow controller for pumping and accurately controlling the feed rate of the corresponding solution;

[0009] A spraying mechanism, wherein the three delivery pipes are connected to the spraying mechanism, and the spraying mechanism is used to spray a mixed solution of the three solutions;

[0010] The conveying mechanism is used to convey the substrate so that the substrate passes between the discharge electrode and the ground electrode and is conveyed to the bottom of the spraying mechanism.

[0011] A dielectric plate is provided between the ground electrode and the discharge electrode, and the dielectric plate is fixed on the ground electrode or the discharge electrode.

[0012] The conveying mechanism includes a pulley, a transmission belt and a drive motor;

[0013] The number of pulleys is at least two;

[0014] The transmission belt is set between multiple pulleys and is in a closed loop. The discharge electrode and the grounding electrode are located on the inner and outer sides of the belt loop respectively. The transmission belt is used to transport the substrate through the gap between the discharge electrode and the grounding electrode.

[0015] The output shaft of the driving motor is coaxially fixed with any pulley, and the driving motor is used to drive the pulley to rotate.

[0016] The spraying mechanism includes a nozzle and a flow channel control part. The end of the delivery pipe away from the liquid storage tank is connected to the flow channel control part. The nozzle is installed on the flow channel control part. The nozzle is used to spray the mixed solution in the flow channel control part onto the upper surface of the substrate on the delivery mechanism.

[0017] The flow channel control part is a four-way component, the three delivery pipes are respectively connected to the three inlets of the four-way component, and the outlet of the four-way component is connected to the nozzle.

[0018] The flow controller includes any one of a metering pump, an injection pump or a fluid pump.

[0019] Substrates include yarns, fabrics, films, glass or ceramic sheets.

[0020] Oxidants include ammonium persulfate;

[0021] Doping acids include inorganic acids and organic acids;

[0022] Inorganic acid includes any one of hydrochloric acid, nitric acid or sulfuric acid;

[0023] The organic acid includes any one of benzenesulfonic acid, malonic acid or glycine.

[0024] A method for continuously processing a conductive polyaniline coating on a substrate surface, using the device for continuously processing a conductive polyaniline coating on a substrate surface to spray the conductive polyaniline coating on the substrate surface, specifically comprising the following steps:

[0025] placing the substrate to be processed on the conveying mechanism;

[0026] The substrate is transported between a discharge electrode and a ground electrode of a DBD plasma processor by a transport mechanism;

[0027] The surface of the substrate is hydrophilized and roughened by a DBD plasma processor;

[0028] The substrate treated by the DBD plasma processor is transported to the bottom of the spraying mechanism through the conveying mechanism;

[0029] According to the intrinsic properties of the substrate to be treated, the feed rates of the aniline monomer solution, the doping acid solution and the oxidant solution are precisely controlled by a flow controller;

[0030] spraying a mixed solution of the three solutions onto the surface of the substrate through a spraying mechanism;

[0031] The micromorphology of the polyaniline coating can be controlled by selecting the type of doping acid solution.

[0032] The substrate after spraying is removed from the conveying mechanism, and a new substrate to be processed is placed at the end of the conveying mechanism close to the DBD plasma processor;

[0033] Repeat the above steps to achieve continuous processing of the conductive polyaniline coating on the surface of the substrate.

[0034] The intrinsic characteristics of the substrate include the porosity, grammage, and thickness of the substrate.

[0035] Beneficial effects of the present invention:

[0036] The present invention achieves hydrophilic and roughening treatments on the substrate surface by providing a DBD plasma processor and a liquid storage system, in conjunction with a spraying mechanism and a conveying mechanism. The hydrophilic treatment makes the substrate surface more easily adsorbed and wetted by the solution, while the roughening treatment increases the specific surface area and mechanical adhesion of the substrate surface. The two work together to significantly increase the activity of the substrate surface, promote the adsorption and polymerization reaction of the aniline monomer, and thus achieve the preparation of a uniform polyaniline coating.

[0037] At the same time, the three solutions are placed independently in three different liquid storage tanks, and the three solutions are only mixed when they enter the flow channel control part together, which can effectively improve the storage stability of the solutions; and the feed rate of the aniline monomer solution, the doping acid solution and the oxidant solution is precisely controlled by a flow controller, and then the mixed solution is sprayed onto the surface of the substrate through a spraying mechanism; this design can complete the uniform preparation of the conductive polyaniline coating with the required morphological and structural characteristics at room temperature, while avoiding the defects of complex temperature control in traditional methods, and solving the problems of large raw material consumption, waste caused by excess, and generation of a large amount of synthetic wastewater in the traditional preparation process, significantly improving the adhesion and conductivity of the coating, reducing production costs, and solving the problems of complex preparation process, poor coating uniformity and conductivity in the existing technology, effectively improving the processing efficiency and quality of the conductive polyaniline coating, and ensuring environmentally friendly and morphology-controllable continuous production, with significant economic benefits and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 This is a schematic structural diagram of a conductive polyaniline coating continuous processing device according to the present invention;

[0040] Figure 2 This is the SEM image of the surface of the polyaniline conductive coating prepared by the traditional liquid phase method;

[0041] Figure 3 This is a SEM image of the surface of the polyaniline conductive coating prepared using benzenesulfonic acid in the present invention;

[0042] Figure 4 This is a SEM image of the surface of the polyaniline conductive coating prepared using malonic acid in the present invention;

[0043] Figure 5 This is a SEM image of the surface of the polyaniline conductive coating prepared using glycine in the present invention;

[0044] Figure 6 This is the SEM image of the surface of the unmodified yarn in Experiment 3 of the present invention;

[0045] Figure 7 This is an SEM image of the yarn surface modified by the method of the present invention. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0047] like Figures 1 to 7 As shown, a device for continuously processing a conductive polyaniline coating on a substrate surface is used to process a conductive polyaniline coating on the surface of a substrate 4, comprising:

[0048] The DBD plasma processor includes a plasma power supply 1, the output end of the plasma power supply 1 is connected to a discharge electrode plate 2, the ground end of the plasma power supply 1 is connected to a ground electrode plate 5, the ground electrode plate 5 is placed parallel to the discharge electrode plate 2, and a gap is left between the ground electrode plate 5 and the discharge electrode plate 2 for the substrate 4 to pass through. The DBD plasma processor is used to hydrophilize and roughen the surface of the substrate 4;

[0049] The liquid storage system includes three liquid storage tanks 8, each of which is filled with an aniline monomer solution, a doping acid solution, and an oxidant solution. Each liquid storage tank 8 is connected to a delivery pipe 9, and each delivery pipe 9 is provided with a flow controller 10. The flow controller 10 is used to pump and accurately control the feed rate of the corresponding solution;

[0050] The three delivery pipes 9 are connected to the spraying mechanism, and the spraying mechanism is used to spray a mixed solution of the three solutions;

[0051] The conveying mechanism is used to convey the substrate 4 so that the substrate 4 passes between the discharge electrode plate 2 and the ground electrode plate 5 and is conveyed to the bottom of the spraying mechanism;

[0052] When the DBD plasma processor is in operation, a voltage is applied between the ground electrode plate 5 and the discharge electrode plate 2 to ionize the gas (usually air), generating a large number of active particles, including free electrons, ions, free radicals, ultraviolet rays, and a large number of active oxygen free radicals (such as -OH, -O, etc.) and ozone (O3), which can react with organic matter on the surface of the substrate 4 to generate hydrophilic functional groups, such as hydroxyl (-OH) and carboxyl (-COOH). These functional groups can significantly improve the hydrophilicity of the surface of the substrate 4; and the ions and free electrons in the plasma can attach to the surface of the substrate 4 to form a charge distribution. These charges can attract polar water molecules through electrostatic action, thereby further improving the hydrophilicity of the surface of the substrate 4; the high-energy particles generated by the DBD plasma processor can also break the chemical bonds on the surface of the substrate 4 to form new active sites, which can further interact with water molecules to increase the hydrophilicity of the surface;

[0053] At the same time, the high-energy electrons, ions, and free radicals generated in the DBD plasma processor can impact the surface of the substrate 4, resulting in physical removal of the surface material. This physical etching action can roughen the surface of the substrate 4, increasing the specific surface area of the surface. The impact of high-energy particles can also form micropores or microcracks on the surface of the substrate 4, further increasing the surface roughness. This allows the DBD plasma processor to hydrophilize and roughen the surface of the substrate 4.

[0054] The hydrophilic treatment makes the surface of substrate 4 more receptive to adsorption and wetting of the solution, while the roughening treatment increases the specific surface area and mechanical adhesion of the substrate 4 surface. These two treatments work together to significantly increase the activity of the substrate 4 surface, promoting the adsorption and polymerization of aniline monomers, thereby achieving the preparation of a uniform polyaniline coating.

[0055] When the treated substrate 4 enters the spraying area via the conveying mechanism, the aniline monomer solution, doping acid solution, and oxidant solution in the liquid storage system are pumped through a flow controller 10 and precisely controlled at each flow rate before being mixed and evenly sprayed onto the surface of the substrate 4 by the spraying mechanism. This spraying process not only achieves precise quantitative mixing of the three solutions but also, by controlling the spraying rate, precisely regulates the thickness, uniformity, and microstructure of the polyaniline coating. Furthermore, because the spraying method directly applies the mixed solution to the surface of the substrate 4, it avoids the problem of uneven coating caused by uneven solution concentration in traditional immersion methods, thereby significantly improving the conductivity and adhesion of the coating.

[0056] The entire reaction process can be carried out at room temperature, without the need for a complex temperature control system. This not only simplifies the operating process and reduces equipment costs and energy consumption, but also avoids uneven reactions or side reactions caused by improper temperature control in traditional chemical oxidative polymerization. In addition, the application of the spraying method reduces reagent waste, and no wastewater or exhaust gas is generated during the reaction process, meeting the environmental protection requirements of green production and effectively solving the environmental pollution problems existing in traditional wet synthesis processes.

[0057] The present invention utilizes a DBD plasma processor and a liquid storage system, combined with a spraying mechanism and a conveying mechanism, to achieve hydrophilization and roughening of the substrate surface (4). This method also precisely controls the feed rate and mixed spraying of the aniline monomer solution, doping acid solution, and oxidant solution. This innovative design allows for uniform preparation of a conductive polyaniline coating at room temperature, avoiding the complex temperature control and wastewater and exhaust emissions associated with traditional methods. This significantly enhances the coating's adhesion and conductivity, reduces production costs, and effectively improves the efficiency and quality of the conductive polyaniline coating. It also ensures environmentally friendly, continuous production with controllable morphology, offering significant economic benefits and broad application prospects.

[0058] It should be noted that the concentration of the solutions contained in the three liquid storage tanks and the type of doping acid can be adjusted according to the actual area of the substrate to be coated, the actual morphology and structure required, and other requirements.

[0059] A dielectric plate 3 is provided between the ground electrode plate 5 and the discharge electrode plate 2, and the dielectric plate 3 is fixed on the ground electrode plate 5 or the discharge electrode plate 2;

[0060] Preferably, the dielectric plate 3 can be a quartz plate made of quartz material.

[0061] The conveying mechanism includes a pulley 7, a transmission belt 6 and a drive motor;

[0062] The number of pulleys 7 is at least two;

[0063] The transmission belt 6 is sleeved between a plurality of pulleys 7. The transmission belt 6 is in a closed loop. The discharge electrode plate 2 and the ground electrode plate 5 are located on the inner and outer sides of the belt loop of the transmission belt 6, respectively. The transmission belt 6 is used to transport the substrate 4 through between the discharge electrode plate 2 and the ground electrode plate 5.

[0064] The output shaft of the driving motor is coaxially fixed to any pulley 7, and the driving motor is used to drive the pulley 7 to rotate;

[0065] Preferably, the conveying mechanism further comprises a bracket, the pulley 7 is rotatably connected to the bracket, and the driving motor is fixed to the bracket via a mounting base;

[0066] It should be noted that after the conveying mechanism and the dielectric plate 3 are provided, the remaining gap between the ground electrode plate 5 and the discharge electrode plate 2 for the substrate 4 to pass through is controlled to a height of 3-5 mm.

[0067] The spraying mechanism includes a nozzle 11 and a flow channel control unit 12. The end of the delivery tube 9 away from the liquid storage tank 8 is connected to the flow channel control unit 12. The nozzle 11 is installed on the flow channel control unit 12 and is used to spray the mixed solution in the flow channel control unit 12 onto the upper surface of the substrate 4 on the delivery mechanism.

[0068] Through the coordinated arrangement of the flow channel control part 12 and the delivery pipe 9, not only can the three solutions be mixed during the spraying process, but the three solutions are also independently placed in three different liquid storage tanks 8. The three solutions are only mixed when they enter the flow channel control part 12 together, which can effectively improve the stability of solution storage.

[0069] The flow channel control part 12 is a four-way component, the three delivery pipes 9 are respectively connected to the three inlets of the four-way component, and the outlet of the four-way component is connected to the nozzle 11;

[0070] Preferably, the four-way assembly can use a four-way valve with three inlets and one outlet;

[0071] The four-way valve can effectively achieve the mixing of three solutions and has the advantages of simple structure and space saving.

[0072] The flow controller 10 includes any one of a metering pump, an injection pump or a fluid pump;

[0073] Preferably, a precision metering pump can be used in the present application to achieve pumping of the solution while tightly controlling the pumping volume of the solution and effectively controlling the pumping feed rate;

[0074] Preferably, the feed rate is controlled at 3-10 mL / min.

[0075] The substrate 4 comprises yarn, fabric, film, glass or ceramic sheet;

[0076] For soft substrates such as yarn, fabric, film or nonwoven materials, DBD plasma processors usually only need to process them for 30-60 seconds;

[0077] For hard substrates such as glass or ceramic sheets, 4 the DBD plasma processor typically treats them for several minutes;

[0078] According to the characteristics of the substrate 4 to be treated (such as fabric, non-woven material, membrane, etc.) itself (such as porosity, grammage, thickness, etc.), the amount of polyaniline coating attached to the substrate 4 is adjusted by precisely controlling the spraying rate and spraying time of the spraying equipment, and ultimately the loading rate of the polyaniline coating (i.e., the percentage of the coating mass to the total mass of the substrate 4) reaches the desired range (1-10wt%).

[0079] Oxidants include ammonium persulfate;

[0080] Doping acids include inorganic acids and organic acids;

[0081] Inorganic acid includes any one of hydrochloric acid, nitric acid or sulfuric acid;

[0082] The organic acid includes any one of benzenesulfonic acid, malonic acid or glycine;

[0083] The preferred doping acid in this application is an inorganic acid; among organic acids, hydrochloric acid, nitric acid, sulfuric acid, etc. are strong acids and are easily ionized in water to produce hydrogen ions for polyaniline doping; while organic acids such as benzenesulfonic acid, malonic acid or glycine are weak acids and have weak hydrogen ion ionization ability. Therefore, the degree of polyaniline doping is weaker than that of strong acids, and the conductivity of polyaniline is also relatively weak. In addition, the strength of the ionization ability will affect the morphology of the polyaniline nanoparticles during the doping process.

[0084] A method for continuously processing a conductive polyaniline coating on a substrate surface, wherein the conductive polyaniline coating is sprayed on the surface of a substrate 4 using the continuous processing device for the conductive polyaniline coating on the substrate surface, specifically comprising the following steps:

[0085] Placing the substrate 4 to be processed on the conveying mechanism;

[0086] The substrate 4 is transported between the discharge electrode plate 2 and the ground electrode plate 5 of the DBD plasma processor by a transport mechanism;

[0087] The surface of the substrate 4 is subjected to hydrophilization and roughening treatment by a DBD plasma processor;

[0088] The substrate 4 treated by the DBD plasma processor is transported to the bottom of the spraying mechanism through the transport mechanism;

[0089] According to the intrinsic properties of the substrate 4 to be treated, the feed rates of the aniline monomer solution, the doping acid solution and the oxidant solution are precisely controlled by the flow controller 10;

[0090] The mixed solution of the three solutions is sprayed onto the surface of the substrate 4 by a spraying mechanism;

[0091] The micromorphology of the polyaniline coating can be controlled by selecting the type of doping acid solution.

[0092] The substrate 4 after spraying is removed from the conveying mechanism, and a new substrate 4 to be processed is placed at the end of the conveying mechanism close to the DBD plasma processor;

[0093] Repeat the above steps to achieve continuous processing of the conductive polyaniline coating on the surface of the substrate 4.

[0094] The intrinsic characteristics of the substrate 4 include the porosity, grammage, and thickness of the substrate 4;

[0095] When the porosity, gram weight, and thickness are different, the amount of oxidant, doping acid, and aniline monomer that can be adsorbed is usually different. Therefore, it is necessary to adjust the appropriate rate according to different substrates 4 to save costs while ensuring conductive properties.

[0096] The following experiments were conducted in this application to verify this method:

[0097] Experiment 1: Comparison between the traditional liquid phase method and this method;

[0098] Using the filter membrane as substrate 4 and ammonium persulfate as oxidant, the filter membrane surface was modified with polyaniline coating using the traditional liquid phase method and the present method respectively;

[0099] In the experiment, benzenesulfonic acid was selected as the doping acid, ammonium persulfate was used as the oxidant, and the concentrations of the aniline monomer solution, doping acid solution, and oxidant solution were all set to 0.5 mol / L.

[0100] When using traditional liquid-phase chemical synthesis methods to prepare conductive polyaniline coatings, the reaction temperature is usually controlled at 0°C and the reaction time is usually 12 hours. However, this method can form a conductive polyaniline coating at room temperature within 2 hours.

[0101] The micromorphology of the coating was observed by scanning electron microscopy (SEM), and the resistivity of the filter membrane surface was measured to evaluate the conductive performance; the micromorphologies of the polyaniline conductive coating prepared by the traditional liquid phase method and the present method were as follows: Figure 2 、 Figure 3 As shown;

[0102] The resistivity of the filter membrane surface after modification by the two methods is shown in the following table:

[0103] Table 1 Surface resistivity (kΩ) of polyaniline-coated polymer membranes modified by two methods

[0104]

[0105] The results show that the filter membrane coating prepared by the traditional method has an uneven microscopic morphology, exists in various forms, and the coating is unevenly distributed, resulting in limited conductivity and high resistivity; while the filter membrane coating prepared by this method has consistent morphology, is granular, and the coating is evenly distributed, which significantly improves the conductivity and significantly reduces the resistivity. At the same time, it avoids the generation of wastewater and waste gas, reflecting the advantages of this method in preparing high-quality conductive filter membranes.

[0106] Experiment 2: Comparison of results using different doping acids in this method;

[0107] The conductive polyaniline coating was processed on the filter membrane using the method when the filter membrane was used as substrate 4, ammonium persulfate was used as oxidant, and the concentrations of the aniline monomer solution, the doping acid solution, and the oxidant solution were all 0.5 mol / L;

[0108] When the doping acid is benzenesulfonic acid, the polyaniline coatings formed are all nano-granular in morphology and the coatings are also very uniform. Figure 3 As shown;

[0109] When the doping acid is malonic acid, the microscopic morphology of the polyaniline formed is nano-granular and the coating is relatively uniform, but the density is not as good as the coating processed by benzenesulfonic acid. Figure 4 As shown;

[0110] When the doping acid is glycine, the microstructure of the formed polyaniline is mainly rod-shaped and network-shaped, and the surface of the modified substrate is emerald green, such as Figure 5 As shown;

[0111] After using three different doping acids to process the conductive polyaniline coating, the surface resistivity of the filter membrane is as follows:

[0112] Table 2 Surface resistivity (kΩ) of polymer filter membranes coated with three acid-doped conductive polyaniline

[0113]

[0114] As can be seen from the table, the coating doped with benzenesulfonic acid has the lowest resistivity, showing excellent conductivity; the coating doped with malonic acid has good conductivity; and the coating doped with glycine has a relatively high resistivity.

[0115] Experiment 3: Preparation of conductive polyaniline coating modified chemical fiber yarn;

[0116] In this experiment, a conductive polyaniline coating was prepared on polyester yarn using hydrochloric acid as the doping acid. The concentrations of aniline monomer, doping acid, and oxidant were all set at 0.1 mol / L. Prior to polyaniline modification, the polyester yarn was treated with a DBD plasma treatment at 30 V for 120 s.

[0117] SEM images show that the surface of untreated polyester fibers is smooth (e.g. Figure 6 After being treated by this method, a uniform nano-granular polyaniline coating is formed on the fiber surface (as shown in Figure 7 shown);

[0118] The volume resistivity of the polyester yarn was measured, and the measurement results are as follows:

[0119] Table 3 Volume resistivity of conductive polyaniline modified polyester yarn (MΩ·cm)

[0120]

[0121] As can be seen from the above table, the conductivity of the yarn was significantly improved after modification; this result shows that this method combined with plasma pretreatment can effectively improve the surface properties of chemical fiber yarns and achieve uniform conductive polyaniline coating preparation, providing a new efficient and environmentally friendly way for the functional modification of chemical fiber materials.

[0122] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0123] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A continuous processing device for a conductive polyaniline coating on a substrate surface, used for processing a conductive polyaniline coating on a substrate (4), characterized in that: include: A DBD plasma processor comprises a plasma power supply (1), wherein the output end of the plasma power supply (1) is connected to a discharge electrode plate (2), and the ground end of the plasma power supply (1) is connected to a ground electrode plate (5). The ground electrode plate (5) and the discharge electrode plate (2) are placed in parallel, and a gap for a substrate (4) to pass through is left between the ground electrode plate (5) and the discharge electrode plate (2). The DBD plasma processor is used to perform hydrophilic and roughening treatment on the surface of the substrate (4); A liquid storage system, comprising three liquid storage tanks (8), each containing an aniline monomer solution, a doping acid solution, and an oxidant solution. The three liquid storage tanks (8) are each connected to a delivery pipe (9), each of which is provided with a flow controller (10). The flow controller (10) is used to pump and accurately control the feed rate of the corresponding solution. A spraying mechanism, wherein the three delivery pipes (9) are connected to the spraying mechanism, and the spraying mechanism is used to spray a mixed solution of the three solutions; The conveying mechanism is used to convey the substrate (4) so that the substrate (4) passes between the discharge electrode plate (2) and the ground electrode plate (5) and is conveyed to the bottom of the spraying mechanism.

2. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 1, characterized in that: A dielectric plate (3) is provided between the grounding electrode plate (5) and the discharge electrode plate (2), and the dielectric plate (3) is fixed on the grounding electrode plate (5) or the discharge electrode plate (2).

3. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 2, characterized in that: The conveying mechanism includes a pulley (7), a transmission belt (6) and a driving motor; The number of pulleys (7) is at least two; The transmission belt (6) is sleeved between a plurality of pulleys (7), the transmission belt (6) is in a closed loop, the discharge electrode plate (2) and the ground electrode plate (5) are respectively located on the inner and outer sides of the belt loop of the transmission belt (6), and the transmission belt (6) is used to transport the substrate (4) through between the discharge electrode plate (2) and the ground electrode plate (5); The output shaft of the driving motor is coaxially fixed with any pulley (7), and the driving motor is used to drive the pulley (7) to rotate.

4. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 3, characterized in that: The spraying mechanism comprises a nozzle (11) and a flow channel control part (12); one end of the delivery pipe (9) away from the liquid storage tank (8) is connected to the flow channel control part (12); the nozzle (11) is mounted on the flow channel control part (12); and the nozzle (11) is used to spray the mixed solution in the flow channel control part (12) onto the upper surface of the substrate (4) on the delivery mechanism.

5. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 4, characterized in that: The flow channel control part (12) is a four-way component, the three delivery pipes (9) are respectively connected to the three inlets of the four-way component, and the outlet of the four-way component is connected to the nozzle (11).

6. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 5, characterized in that: The flow controller (10) includes any one of a metering pump, an injection pump or a fluid pump.

7. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 6, characterized in that: The substrate (4) includes yarn, fabric, film, glass or ceramic sheet.

8. The device for continuously processing a conductive polyaniline coating on a substrate surface according to claim 7, characterized in that: Oxidants include ammonium persulfate; Doping acids include inorganic acids and organic acids; Inorganic acid includes any one of hydrochloric acid, nitric acid or sulfuric acid; The organic acid includes any one of benzenesulfonic acid, malonic acid or glycine.

9. A method for continuously processing a conductive polyaniline coating on a substrate surface, comprising spraying a conductive polyaniline coating on a substrate surface using the apparatus for continuously processing a conductive polyaniline coating on a substrate surface as claimed in any one of claims 1 to 8, wherein: The specific steps include: placing a substrate (4) to be processed on a conveying mechanism; The substrate (4) is transported between the discharge electrode plate (2) and the ground electrode plate (5) of the DBD plasma processor by a transport mechanism; Performing hydrophilic and roughening treatment on the surface of the substrate (4) by using a DBD plasma processor; The substrate (4) processed by the DBD plasma processor is transported to the bottom of the spraying mechanism through the transport mechanism; According to the intrinsic characteristics of the substrate to be treated (4), the feed rates of the aniline monomer solution, the doping acid solution and the oxidant solution are precisely controlled by a flow controller (10); spraying a mixed solution of the three solutions onto the surface of the substrate (4) through a spraying mechanism; The micromorphology of the polyaniline coating can be controlled by selecting the type of doping acid solution. The substrate (4) after spraying is removed from the conveying mechanism, and a new substrate (4) to be processed is placed at one end of the conveying mechanism close to the DBD plasma processor; Repeat the above steps to achieve continuous processing of the conductive polyaniline coating on the surface of the substrate (4).

10. The method for continuously processing a conductive polyaniline coating on a substrate surface according to claim 9, characterized in that: The intrinsic characteristics of the substrate (4) include the porosity, grammage and thickness of the substrate (4).

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