Fabric-based conductive films, their preparation methods and applications

Abstract

The present invention provides a fabric-based conductive film and its preparation method and application. The present invention prepares a monomer aqueous solution and an oxidant aqueous solution respectively, and performs a cooling treatment on them; then the fabric is wrapped around the surface of a roller of a rolling mill, the rolling mill is started so that the two rollers are tightly attached and rotated, and during the rotation of the rolling mill, the monomer aqueous solution and the oxidant aqueous solution are alternately dripped onto the fabric surface, and after repeating several times, the rolling mill is stopped and the two rollers of the rolling mill are separated to obtain a fabric after the monomer is in-situ rolled and polymerized and deposited. After airing, washing, ethanol soaking, and drying, a fabric-based conductive film can be obtained. In the above manner, the present invention can prepare a fabric-based conductive film with a smooth and uniform surface and good conductivity, and the preparation method is simple, easy to operate, and suitable for large-scale production. The obtained fabric-based conductive film is relatively thin and easy to cut into a specific shape, and has very good application prospects.

Description

Technical Field

[0001] This invention relates to the field of conductive textile materials technology, and in particular to a fabric-based conductive film, its preparation method, and its application. Background Technology

[0002] Conductive polymers possess excellent conductivity, environmental stability, and energy storage properties, and are easy to prepare, making them promising candidates for applications in energy, sensors, and electromagnetic shielding. However, conductive polymers lack self-supporting capabilities and are difficult to form films on their own, typically requiring a template or substrate for support. For example, Chinese patent application CN201811023643.2 discloses a method for preparing a nanofiber composite polyester conductive fabric. This involves mixing an aqueous solution of graphene oxide with a nanofiber solution, shaking in a water bath to obtain a precipitate, pouring the precipitate onto the surface of a polyester fabric, and then coating and drying to obtain the nanofiber composite polyester conductive fabric. However, conductive polymers are difficult to formulate into homogeneous aqueous solutions, and using organic solvents often leads to environmental pollution problems. Furthermore, mixing them with polymers such as polyurethane to create conductive slurries results in a low proportion of conductive polymer components, leading to poor overall conductivity.

[0003] Compared with directly loading conductive paste onto the fabric surface, in-situ polymerization of conductive polymers onto the fabric substrate is an effective method for preparing flexible conductive materials, which can simultaneously achieve mechanical properties and conductivity. For example, Chinese patent application number CN201210429607.2 discloses a method for preparing conductive polypyrrole composite fabric for flexible supercapacitor electrodes, including: (1) dissolving pyrrole in an organic solvent to prepare solution A, and dissolving an oxidant and a dopant in an aqueous solution to prepare solution B; (2) transferring solution B into solution A to form a clear two-phase interface, wherein the organic solvent is the lower layer and the aqueous solution is the upper layer, placing the fabric at the interface and allowing it to react for 0.5 to 2 hours, then removing the fabric and repeatedly washing it with anhydrous ethanol and water to obtain a fabric with a single-sided coating; (3) turning the fabric with the single-sided coating over and coating it again according to step (2). However, the conductive polymers directly polymerized onto the fabric in this way are granular, and the resulting conductive fabric is relatively rough. During use, it is subject to greater friction, which makes the conductive polymers easy to fall off. Furthermore, for large-area fabrics, in-situ polymerization in the liquid phase can easily lead to uneven adhesion of conductive polymers, or require increased raw material input to achieve uniformity.

[0004] In view of this, it is necessary to design an improved method for preparing fabric-based conductive films to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a fabric-based conductive film with a smooth and uniform surface and good conductivity, so as to apply it to wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, sensors and other fields.

[0006] To achieve the above objectives, the present invention provides a method for preparing a fabric-based conductive film, comprising the following steps:

[0007] S1. Prepare aqueous solutions of monomer and oxidant separately, and then cool them down.

[0008] S2. Wrap the fabric around the surface of one of the rollers of the rolling mill, start the rolling mill so that the two rollers are in close contact and rotate; during the rotation of the rolling mill, the monomer aqueous solution and the oxidant aqueous solution are alternately dripped onto the surface of the fabric, and after repeating several times, the rolling mill is stopped and the two rollers of the rolling mill are separated to obtain the fabric after in-situ rolling polymerization deposition of monomer.

[0009] S3. The fabric after in-situ roll-press polymerization deposition of the monomer is sequentially subjected to air drying, water washing, ethanol soaking and drying treatment to obtain a fabric-based conductive film.

[0010] As a further improvement of the present invention, in step S1, the monomer aqueous solution is an aqueous solution of a conductive polymer monomer and a surfactant; in the monomer aqueous solution, the concentration of the conductive polymer monomer is 1.0 to 100.0 g / L, and the molar ratio of the conductive polymer monomer to the surfactant is 10:1 to 30:1; the conductive polymer monomer is one or a mixture of several selected from pyrrole, alkylpyrrole, aniline, thiophene, and 3,4-ethylenedioxythiophene; the surfactant is one or a mixture of several selected from sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, and sodium anthraquinone-2-sulfonate.

[0011] As a further improvement of the present invention, in step S1, the oxidant aqueous solution is a mixed aqueous solution of oxidant and doped acid; the molar ratio of oxidant to doped acid is 5:1 to 30:1; the oxidant is one or more of ferric chloride, ferric nitrate, and ammonium persulfate, and the doped acid is one or more of hydrogen chloride, p-toluenesulfonic acid, salicylic acid, and sulfosalicylic acid.

[0012] As a further improvement of the present invention, in step S2, the molar ratio of the oxidant in the aqueous solution of the oxidant added to the surface of the fabric each time to the conductive polymer monomer in the aqueous solution of the monomer is 0.5:1 to 4:1.

[0013] As a further improvement of the present invention, in step S2, the fabric is one of polypropylene nonwoven fabric, polyester nonwoven fabric, polylactic acid nonwoven fabric, cotton fabric, and nylon fabric; preferably, the surface of the fabric is coated with PVA-co-PE nanofibers.

[0014] As a further improvement of the present invention, in step S1, the temperature after the cooling treatment is 0 to 5°C.

[0015] As a further improvement of the present invention, in step S2, the two pressure rollers in the rolling mill are arranged side by side on the same horizontal plane.

[0016] As a further improvement of the present invention, the pressure between the two pressure rollers of the rolling mill is 0.3 to 0.8 MPa, and the rotational speed of the two pressure rollers is 5 to 25 r / min.

[0017] The present invention also provides a fabric-based conductive film, which is prepared by the preparation method described in any of the above technical solutions.

[0018] The present invention also provides the application of the fabric-based conductive film in the preparation of wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, and sensors.

[0019] The beneficial effects of the present invention are:

[0020] 1. The fabric-based conductive film preparation method provided by this invention involves alternately dripping monomer aqueous solution and oxidant aqueous solution onto the fabric surface during the rotation of a rolling mill. Under the squeezing action of the oxidant and the two pressure rollers of the rolling mill, the monomer undergoes a polymerization reaction while being forcefully deposited onto the fabric surface, thereby obtaining a fabric-based conductive film with a smooth and uniform surface and good conductivity. Furthermore, the fabric-based conductive film preparation method provided by this invention is simple, easy to operate, suitable for large-scale production, and produces a thinner fabric-based conductive film that is easy to cut into specific shapes for use in wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, sensors, and other fields, showing excellent application prospects.

[0021] 2. The method for preparing the fabric-based conductive film provided by the present invention, by adding a specific amount of surfactant to the monomer aqueous solution, can effectively improve the fineness of the conductive polymer particles synthesized in situ under the combined action of the surfactant and the extrusion of the two pressure rollers of the rolling mill, so that the conductive polymer can be directly attached to the fabric substrate in the thinnest possible state during the polymerization process, thereby obtaining a thin and uniform fabric-based conductive film with good conductivity. Attached Figure Description

[0022] Figure 1The diagram shows the two pressure rollers of the rolling mill and the structure of the fabric used in the fabric-based conductive film preparation method provided by the present invention.

[0023] Figure 2 A photograph of the fabric-based conductive film prepared in Example 1.

[0024] Figure 3 This is a SEM image of the fabric-based conductive film prepared in Example 1.

[0025] Figure 4 This is a SEM image of the fabric-based conductive film prepared in Example 2. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0028] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] This invention provides a method for preparing a fabric-based conductive film, comprising the following steps:

[0030] S1. Prepare aqueous solutions of monomer and oxidant separately, and then cool them down.

[0031] S2. Wrap the fabric around the surface of one of the rollers of the rolling mill, start the rolling mill so that the two rollers are in close contact and rotate; during the rotation of the rolling mill, the monomer aqueous solution and the oxidant aqueous solution are alternately dripped onto the surface of the fabric, and after repeating several times, the rolling mill is stopped and the two rollers of the rolling mill are separated to obtain the fabric after in-situ rolling polymerization deposition of monomer.

[0032] S3. The fabric after in-situ roll-press polymerization deposition of the monomer is sequentially subjected to air drying, water washing, ethanol soaking and drying treatment to obtain a fabric-based conductive film.

[0033] In step S1, the temperature after the cooling treatment is 0-5°C. This setting is beneficial for the in-situ polymerization of monomers into finer polymer particles and prevents the polymer particles from easily falling off the fabric substrate due to their large size.

[0034] The monomer aqueous solution is an aqueous solution of conductive polymer monomer and surfactant; the molar ratio of the conductive polymer monomer to the surfactant is 10:1 to 30:1; in the monomer aqueous solution, the concentration of the conductive polymer monomer is 1.0 to 100.0 g / L, and the conductive polymer monomer is one or a mixture of several selected from pyrrole, alkylpyrrole, aniline, thiophene, and 3,4-ethylenedioxythiophene; the surfactant is one or a mixture of several selected from sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, and sodium anthraquinone-2-sulfonate. The surfactant promotes finer conductive polymer particles, allowing them to adhere directly to the fabric substrate in the thinnest possible state under the pressure of the two rollers of the rolling mill, thereby obtaining a thin and uniform fabric-based conductive film with good conductivity.

[0035] The oxidant aqueous solution is a mixed aqueous solution of the oxidant and the doped acid; the molar ratio of the oxidant to the doped acid is 5:1 to 30:1; the oxidant is one or more of ferric chloride, ferric nitrate, and ammonium persulfate; and the doped acid is one or more of hydrogen chloride, p-toluenesulfonic acid, salicylic acid, and sulfosalicylic acid.

[0036] In step S2, the volumes of the monomer aqueous solution and the oxidant aqueous solution added to the fabric surface each time are equal. The specific volume can be selected according to the fabric width (the dimension in the length direction of the pressure roller). Preferably, the ratio of the total volume of the monomer aqueous solution and the oxidant aqueous solution to the fabric width is 1 to 10 mL / cm. The molar ratio of the oxidant in the oxidant aqueous solution and the conductive polymer monomer in the monomer aqueous solution added to the fabric surface each time is 0.5:1 to 4:1.

[0037] The fabric is one of polypropylene nonwoven fabric, polyester nonwoven fabric, polylactic acid nonwoven fabric, cotton fabric, and nylon fabric; preferably, the surface of the fabric is modified with PVA-co-PE nanofibers. Since the PVA-co-PE nanofibers are finer than the fibers of the fabric modified with them, the density of the entire fabric is improved, and more sites are provided for in-situ polymerization of monomers.

[0038] The two pressure rollers in the rolling mill are arranged side-by-side on the same horizontal plane, rather than vertically, which helps to retain the reaction liquid and allow it to react more extensively in situ on the fabric substrate. The pressure between the two pressure rollers is 0.3–0.8 MPa, and the rotational speed of the two pressure rollers is 5–25 r / min.

[0039] This invention also provides a fabric-based conductive film, prepared by the method described above. The fabric-based conductive film can be applied to the fabrication of wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, and sensors.

[0040] The preparation method of the fabric-based conductive film provided by the present invention will be specifically described below with reference to specific embodiments and comparative examples.

[0041] Example 1

[0042] This embodiment provides a method for preparing a fabric-based conductive film, including the following steps:

[0043] S1. Prepare 3 portions of 30 mL monomer aqueous solution (pyrrole monomer / anthraquinone-2-sulfonate sodium salt, molar ratio of 30:1, the concentration of pyrrole monomer in the monomer aqueous solution is 70 g / L) and 3 portions of 30 mL oxidant aqueous solution (ferric chloride / salicylic acid, molar ratio of 13:1, the molar ratio of ferric chloride to pyrrole is 2:1, and place the monomer aqueous solution and oxidant aqueous solution in a refrigerator to freeze and cool.

[0044] S2. Polypropylene nonwoven fabric modified with PVA-co-PE nanofibers (PVA-co-PE nanofiber loading is 6.5 g / m²). 2 The monomer is wrapped on one roller of a rolling mill. The rolling mill is started so that the two rollers are pressed together (pressure 0.6MPa) and rotated (20r / min). One part of monomer aqueous solution is slowly dripped onto the fabric, followed by one part of oxidant aqueous solution. Under the squeezing action of the oxidant and the two rollers of the rolling mill, the monomer undergoes a polymerization reaction and is strongly deposited on the fabric surface. Three parts of monomer aqueous solution and oxidant aqueous solution are added alternately. After both solutions are dripped, the rolling mill is stopped and the two rollers are separated to obtain the fabric after in-situ compression polymerization and deposition of monomer.

[0045] S3. After the monomer is deposited by in-situ roll-press polymerization, the fabric is placed on the pressure roller and left to dry for a period of time. Then, it is washed with water, soaked in ethanol and dried in sequence to obtain a fabric-based conductive film.

[0046] In step S2, the structural diagram of the fabric roll on the rolling mill is shown below. Figure 1 As shown ( Figure 1 The white part is fabric, and the black part consists of two unpressed rollers.

[0047] The physical photographs and SEM images of the fabric-based conductive film prepared in this embodiment are shown below. Figure 2 , Figure 3 As shown. Figure 2 It is clearly visible that the conductive film is relatively smooth, and even has a certain degree of reflectivity; Figure 3 It can be seen that the gaps between the polypropylene fibers are filled with polypyrrole, and the polypyrrole is not suspended on the surface of the substrate fibers in the form of coarse particles.

[0048] Testing revealed that the fabric-based conductive film prepared in this embodiment has a thickness of 0.145 mm and a resistivity of 0.41 Ωcm, exhibiting good conductivity. A constant current charge-discharge test was conducted on a symmetrical supercapacitor assembled with this electrode using a two-electrode test system; at a current density of 1 A / g, the specific capacitance of this electrode was 65 F / g. Therefore, the fabric-based conductive film prepared by this invention has excellent potential application value in wearable electronic devices, supercapacitors, electromagnetic shielding, and other fields.

[0049] Example 2

[0050] This embodiment provides a method for preparing a fabric-based conductive film, including the following steps:

[0051] S1. Prepare two 30 mL monomer aqueous solutions (aniline monomer / sodium dodecyl sulfonate, molar ratio 15:1) and two 30 mL oxidant aqueous solutions (ammonium persulfate / p-toluenesulfonic acid, molar ratio 30:1), with the molar ratio of ammonium persulfate to aniline being 0.5:1. Place the monomer aqueous solution and oxidant aqueous solution in a refrigerator to freeze and cool.

[0052] S2. Wrap the polypropylene nonwoven fabric around one roller of a rolling mill. Start the rolling mill so that the two rollers are pressed together (pressure 0.8MPa) and rotate (5r / min). Slowly add 1 part of monomer aqueous solution to the fabric, followed by 1 part of oxidant aqueous solution. Under the squeezing action of the oxidant and the two rollers, the monomer undergoes a polymerization reaction and is strongly deposited on the fabric surface. Repeat the alternating addition of 2 parts of monomer aqueous solution and oxidant aqueous solution. After both solutions are finished, stop the rolling mill and separate the two rollers to obtain the fabric after in-situ compression polymerization and deposition of monomer.

[0053] S3. After the monomer is deposited by in-situ rolling and polymerization, the fabric is placed on a roller and left to dry for a period of time. Then, it is washed with water, soaked in ethanol and dried in sequence to obtain a fabric-based conductive film.

[0054] The SEM image of the fabric-based conductive film prepared in this embodiment is shown below. Figure 4 As shown. After testing, the thickness of the fabric-based conductive film prepared in this embodiment was 0.137 mm; the resistivity was 13.8 Ωcm, exhibiting good conductivity; a constant current charge-discharge test was performed on the symmetrical supercapacitor assembled with this electrode using a two-electrode test system, and the specific capacitance of the electrode was 78 F / g at a current density of 1 A / g.

[0055] Example 3

[0056] This embodiment provides a method for preparing a fabric-based conductive film, including the following steps:

[0057] S1. Prepare 4 parts of 15 mL monomer aqueous solution (pyrrole monomer / sodium dodecylbenzenesulfonate, molar ratio of 10:1) and 4 parts of 15 mL oxidant aqueous solution (ferric nitrate / sulfosalicylic acid, molar ratio of 5:1), with the molar ratio of ferric nitrate to pyrrole being 4:1. Place the monomer aqueous solution and oxidant aqueous solution in a refrigerator to freeze and cool.

[0058] S2. Wrap the polyester nonwoven fabric around one roller of a rolling mill. Start the rolling mill so that the two rollers are pressed together (pressure 0.3MPa) and rotate (25r / min). Slowly add 1 part of monomer aqueous solution to the fabric, followed by 1 part of oxidant aqueous solution. Under the squeezing action of the oxidant and the two rollers, the monomer undergoes polymerization while being strongly deposited on the fabric surface. Repeat the alternating addition of 4 parts of monomer aqueous solution and oxidant aqueous solution. After both solutions are finished, stop the rolling mill and separate the two rollers to obtain the fabric after in-situ compression polymerization and deposition of monomer.

[0059] S3. After the monomer is deposited by in-situ roll-press polymerization, the fabric is placed on the pressure roller and left to dry for a period of time. Then, it is washed with water, soaked in ethanol and dried in sequence to obtain a fabric-based conductive film.

[0060] After testing, the thickness of the fabric-based conductive film prepared in this embodiment was 0.141 mm; the resistivity was 1.5 Ωcm, showing good conductivity; the symmetrical supercapacitor assembled with this electrode was subjected to constant current charge-discharge test using a two-electrode test system, and the specific capacitance of the electrode was 73 F / g at a current density of 1 A / g.

[0061] Comparative Example 1

[0062] This comparative example provides a method for preparing a fabric-based conductive film. The difference between Comparative Example 1 and Example 2 is that Comparative Example 1 involves a reaction conducted in a water bath shaker, without the fabric rolling process. The specific preparation process is as follows:

[0063] Polypropylene nonwoven fabric modified with PVA-co-PE nanofibers was placed in 90 mL of monomer aqueous solution (pyrrole monomer / anthraquinone-2-sulfonate sodium salt, molar ratio 30:1), and the reaction system was subjected to polymerization reaction at low temperature. Under the ring rotation condition of water bath shaker, 60 mL of oxidant aqueous solution (ferric chloride / salicylic acid, molar ratio 13:1) was added dropwise. The molar ratio of ferric chloride to pyrrole was 2:1. After reacting for 12 hours, the resulting black fabric was taken out, washed with water, soaked in ethanol, and dried to obtain polypyrrole conductive fabric.

[0064] Testing revealed that the conductive fabric had a thickness of 0.157 mm and a resistivity of 1.5 Ωcm, but its conductivity was somewhat uneven. A constant current charge-discharge test was conducted on a symmetrical supercapacitor assembled with this electrode using a two-electrode test system; at a current density of 1 A / g, the specific capacitance of this electrode was 33 F / g. Additionally, due to the lack of a rolling mill, the surface of the conductive fabric felt rough to the touch.

[0065] Comparative Example 2

[0066] This comparative example provides a method for preparing a fabric-based conductive film. Compared with Example 1, the difference lies in step S2, where the fabric is first immersed in a monomer aqueous solution for padding, and then immersed in an oxidant aqueous solution for padding. The specific preparation process is as follows:

[0067] The polypropylene nonwoven fabric modified with PVA-co-PE nanofibers was impregnated in a monomer aqueous solution (pyrrole monomer / anthraquinone-2-sulfonate sodium salt, molar ratio of 30:1). After thorough impregnation, it was removed and then placed in an oxidant aqueous solution (ferric chloride / salicylic acid, molar ratio of 13:1) for further impregnation. After impregnation, a polymerization reaction was carried out at a low temperature. After 12 hours of reaction, the resulting black fabric was removed, washed with water, soaked in ethanol, and dried to obtain a fabric-based conductive film.

[0068] After testing, the thickness of the fabric-based conductive film prepared in this comparative example was 0.149 mm. Compared with Example 1, the polymer obtained by in-situ polymerization in this comparative example was not continuously subjected to rolling action, so the polypyrrole film-forming properties were poor and the resistivity was 5.8 Ωcm. A constant current charge-discharge test was performed on the symmetrical supercapacitor assembled with this electrode using a two-electrode test system. The specific capacitance of this electrode was 25 F / g at a current density of 1 A / g.

[0069] Comparative Example 3

[0070] This comparative example provides a method for preparing a fabric-based conductive film. Compared with Example 1, the only difference is that the monomer aqueous solution does not contain a surfactant. All other steps and parameters are the same as in Example 1 and will not be repeated here.

[0071] After testing, the thickness of the fabric-based conductive film prepared in this comparative example was 0.162 mm. Compared with Example 1, the resistivity was higher, at 8.2 Ωcm. This is because the surfactant can better disperse the pyrrole monomer in the reaction solution, thereby making the pyrrole monomer adsorbed by the fabric uniformly distributed, and the polypyrrole obtained by polymerization is more uniform and delicate. The symmetrical supercapacitor assembled with this electrode was subjected to constant current charge-discharge test using a two-electrode test system. At a current density of 1 A / g, the specific capacitance of this electrode was 16 F / g.

[0072] In summary, this invention provides a fabric-based conductive film, its preparation method, and its applications. The invention involves preparing aqueous solutions of monomer and oxidant, respectively, and then cooling them. The fabric is then wrapped around the surface of one of the rollers of a rolling mill. The rolling mill is started so that the two rollers are tightly pressed together and rotated. During the rotation of the rolling mill, the monomer aqueous solution and the oxidant aqueous solution are alternately dripped onto the fabric surface. After repeating this process several times, the rolling mill is stopped, and the two rollers are separated, resulting in a fabric after in-situ compression polymerization deposition of the monomer. After drying, washing, ethanol soaking, and drying, the fabric-based conductive film is obtained. Through this method, this invention can prepare a fabric-based conductive film with a smooth and uniform surface and good conductivity. The preparation method is simple, easy to operate, and suitable for large-scale production. The resulting fabric-based conductive film is relatively thin, making it easy to cut into specific shapes and use in wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, and sensors, showing excellent application prospects.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for preparing a fabric-based conductive film, characterized in that, The steps include: S1. Prepare aqueous solutions of monomer and oxidant separately, and then cool them down. The aqueous solution of monomer is an aqueous solution of conductive polymer monomer and surfactant. In the aqueous solution of monomer, the concentration of conductive polymer monomer is 1.0~100.0 g / L, and the molar ratio of conductive polymer monomer to surfactant is 10:1~30:

1. The conductive polymer monomer is one or a mixture of several of pyrrole, alkylpyrrole, aniline, thiophene, and 3,4-ethylenedioxythiophene. The surfactant is one or a mixture of several of sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, and sodium anthraquinone-2-sulfonate. S2. The fabric is wrapped around the surface of one of the pressure rollers of a rolling mill. The rolling mill is started so that the two pressure rollers are pressed together and rotated. During the rotation of the rolling mill, the monomer aqueous solution and the oxidant aqueous solution are alternately dripped onto the surface of the fabric. After repeating this several times, the rolling mill is stopped and the two pressure rollers of the rolling mill are separated to obtain the fabric after in-situ compression polymerization deposition of the monomer. The two pressure rollers in the rolling mill are arranged side by side on the same horizontal plane. S3. The fabric after in-situ roll-press polymerization deposition of the monomer is sequentially subjected to air drying, water washing, ethanol soaking and drying treatment to obtain a fabric-based conductive film.

2. The method for preparing the fabric-based conductive film according to claim 1, characterized in that: In step S1, the oxidant aqueous solution is a mixed aqueous solution of oxidant and doped acid; the molar ratio of oxidant to doped acid is 5:1 to 30:1; the oxidant is one or more of ferric chloride, ferric nitrate, and ammonium persulfate; and the doped acid is one or more of hydrogen chloride, p-toluenesulfonic acid, salicylic acid, and sulfosalicylic acid.

3. The method for preparing the fabric-based conductive film according to claim 2, characterized in that: In step S2, the molar ratio of the oxidant in the oxidant aqueous solution to the conductive polymer monomer in the monomer aqueous solution added to the surface of the fabric each time is 0.5:1 to 4:

1.

4. The method for preparing the fabric-based conductive film according to claim 1, characterized in that: In step S2, the fabric is one of polypropylene nonwoven fabric, polyester nonwoven fabric, polylactic acid nonwoven fabric, cotton fabric, and nylon fabric.

5. The method for preparing the fabric-based conductive film according to claim 4, characterized in that: In step S2, the surface of the fabric is modified with PVA-co-PE nanofibers.

6. The method for preparing the fabric-based conductive film according to claim 1, characterized in that: In step S1, the temperature after the cooling treatment is 0~5℃.

7. The method for preparing the fabric-based conductive film according to claim 1, characterized in that: The pressure between the two rollers of the rolling mill is 0.3~0.8MPa, and the rotational speed of the two rollers is 5~25r / min.

8. A fabric-based conductive film, characterized in that: It is prepared by the preparation method described in any one of claims 1-7.

9. The application of the fabric-based conductive film of claim 8 in the preparation of wearable electronic devices, electronic circuits, supercapacitors, electromagnetic shielding, stealth technology, and sensors.

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