Preparation method of conductive shielding fabric and application of conductive shielding fabric to electrostatic protective clothing

Abstract

The invention relates to a preparation method of a conductive shielding fabric and application of the conductive shielding fabric to electrostatic protection clothing. The preparation method comprises the following steps: S1, ultrasonically mixing a graphene oxide dispersion liquid and a pyrrole monomer; depositing on the surface of a terylene base material through electrochemical deposition, and performing heat treatment; s2, the graphene composite fibers and the stainless steel fibers are wrapped; s3, mixing at least two of polyimide fibers, calcium alginate fibers and aramid fibers; s4, the conductive core layer raw material and the functional skin layer raw material are fed into a drafting device to form core-shell structure blended yarn with the inner layer being the conductive core layer and the outer layer being the functional skin layer; and S5, weaving the blended yarns by using a warp knitting machine to obtain the conductive shielding fabric. According to the preparation method of the conductive shielding fabric and the application of the conductive shielding fabric to electrostatic protective clothing, the defects of the traditional conductive shielding fabric in performance and function are overcome, and the conductive shielding fabric has the advantages of good air permeability, moisture absorption and sweat releasing capability, multiple functions, high environmental adaptability and wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of functional fabric technology, specifically relating to a method for preparing a conductive shielding fabric and its application in electrostatic protective clothing. Background Art

[0002] Conductive shielding fabrics have wide and crucial applications in numerous fields. In the field of electronic equipment, with the rapid development of electronic technology, the integration and operating speed of electronic devices are constantly increasing, leading to increasingly serious electromagnetic interference problems. Conductive shielding fabrics can be used to make the outer casing and internal shielding layers of electronic devices, effectively reducing electromagnetic radiation interference to the surrounding environment and other equipment, and ensuring the normal operation of electronic equipment. For example, in consumer electronics products such as mobile phones and computers, the use of conductive shielding fabrics can reduce the potential harm of electromagnetic radiation to the human body, while improving the stability and reliability of the equipment.

[0003] In the power industry, especially in high-voltage transmission and substation systems, workers face threats from static electricity and electromagnetic radiation when performing live-line work. Protective clothing made of conductive shielding fabric can provide reliable safety protection for workers, preventing electric shock accidents caused by static electricity buildup and reducing the harm of electromagnetic radiation to the human body. For example, at a 500kV converter station of the State Grid, workers need to wear protective clothing with good conductive shielding properties for continuous work to ensure their own safety.

[0004] Currently, common conductive shielding fabrics on the market mainly include conductive yarn antistatic fabrics, conductive fiber antistatic fabrics, and antistatic fabrics treated with additives. Among them, antistatic and conductive fabrics made by blending conductive yarns, conductive fibers, and other fibers are more widely used because these fabrics have good conductivity, antistatic properties, and durability. For example, traditional conductive shielding fabrics often use metal fibers blended with natural / synthetic fibers, such as stainless steel / polyester blends. Metal fibers have good conductivity and can effectively conduct static electricity, thereby achieving a shielding effect.

[0005] Traditional conductive shielding fabrics have the following problems: 1. Stiff and poorly breathable: Metal fibers have a relatively high density. When blended with other fibers, they make the fabric stiff and lack softness and comfort. At the same time, this type of fabric has poor breathability, making it difficult for air to circulate within the fabric. This causes sweat to accumulate on the skin surface, leading to discomfort. For example, the breathability of traditional pure stainless steel fiber plain weave fabric is only 350mm / s, far below the level required for human comfort. 2. Poor moisture absorption and wicking capacity: The insufficient moisture absorption and wicking capacity of traditional conductive shielding fabrics leads to a series of problems due to sweat retention. On the one hand, prolonged sweat accumulation can cause damp skin, which easily breeds bacteria and causes skin diseases; on the other hand, it increases the body's heat stress index, making people feel stuffy, irritable, and reducing work efficiency and comfort. This problem is particularly prominent in high-temperature and high-humidity working environments. 3. Limited functionality and lack of environmental adaptability: Traditional fabrics often only have a single conductive shielding function, which cannot meet the needs of complex and changing usage environments. For example, in certain workplaces, there may be a risk of bacterial growth, requiring fabrics to have antibacterial properties; in outdoor environments, fabrics may be contaminated by dust and stains, requiring self-cleaning capabilities. Furthermore, the human body has different comfort needs at different ambient temperatures, and traditional fabrics cannot regulate body temperature, failing to provide a comfortable experience for the wearer. 4. Other potential problems: In addition to the main problems mentioned above, traditional conductive shielding fabrics may have other shortcomings. For example, the addition of conductive threads and fibers can affect the fabric's softness, causing an itchy sensation that is difficult to tolerate; during dyeing and finishing processes, the fabric's conductivity and antistatic properties may be weakened; metal fibers have a stiff feel and exhibit weak inter-fiber cohesion during actual processing, requiring additional measures to achieve uniform mixing between fibers, increasing the complexity and cost of the production process.

[0006] Therefore, traditional conductive shielding fabrics have many shortcomings in performance and function, failing to meet the diverse needs of modern society for conductive shielding fabrics. Thus, developing a conductive shielding fabric with good breathability, moisture-wicking ability, multifunctionality, and strong environmental adaptability is of significant practical importance. Summary of the Invention

[0007] Purpose of the invention: In order to overcome the above shortcomings, the purpose of this invention is to provide a method for preparing conductive shielding fabric and its application in electrostatic protective clothing. It aims to solve the shortcomings of traditional conductive shielding fabrics in terms of performance and function, and has good breathability, moisture absorption and perspiration wicking ability, multifunctionality and strong environmental adaptability, with broad application prospects.

[0008] The objective of this invention is achieved through the following technical solution: A method for preparing a conductive shielding fabric includes the following steps: S1: The graphene oxide dispersion and pyrrole monomer were ultrasonically mixed to obtain a mixture; the mixture was deposited on the surface of a polyester substrate by electrochemical deposition, and after heat treatment, graphene composite fiber was obtained. S2: Graphene composite fibers are wrapped with stainless steel fibers to obtain conductive core material. S3: Mix at least two types of fibers, including polyimide fiber, calcium alginate fiber, and aramid fiber, to obtain a functional skin material; S4: The conductive core material and the functional skin material are fed into the drawing device respectively. The drawing device controls the feeding speed and tension of the conductive core material and the functional skin material according to the preset ratio requirements, so that the conductive core material is evenly coated on the surface of the functional skin material, forming a core-shell structure blended yarn with a conductive core layer and a functional skin layer as the outer layer. S5: The blended yarn is woven using a warp knitting machine to produce an conductive shielding fabric.

[0009] The method for preparing the conductive shielding fabric of this invention first involves ultrasonically mixing a graphene oxide dispersion with pyrrole monomers and electrochemically depositing the mixture onto the surface of a polyester substrate to obtain graphene composite fibers with good conductivity. Next, the graphene composite fibers are wrapped with stainless steel fibers to form a conductive core layer material, ensuring the conductivity of the core layer. Then, at least two types of fibers selected from polyimide fibers, calcium alginate fibers, and aramid fibers are mixed to form a functional outer layer material, endowing the fabric with multiple functions. Finally, the conductive core layer material and the functional outer layer material are used to form a core-shell structured blended yarn through a drawing device and woven into a fabric, resulting in a fabric that combines conductivity and multiple functionalities. In practical applications, this fabric can be used to make anti-static protective clothing, effectively shielding static electricity and protecting the wearer.

[0010] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S1, the concentration of graphene oxide in the graphene oxide dispersion is 0.5~3 mg / mL; the molar ratio of graphene oxide to pyrrole monomer is 1:(80~120).

[0011] Preferably, the concentration of graphene oxide in the graphene oxide dispersion is 2.0 mg / mL; the molar ratio of graphene oxide to pyrrole monomer is 1:100.

[0012] Appropriate concentration and molar ratio can ensure that the mixture adheres uniformly to the surface of the polyester substrate during the electrochemical deposition process, thereby producing graphene composite fibers with stable performance.

[0013] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, the electrochemical deposition process parameters in S1 are: potential range 0.6~1.2 V, deposition time 15~30 min, temperature 20~30℃, deposition thickness 100~500 nm; heat treatment at 100~120℃ for 1~3 h; and surface resistance of graphene composite fiber ≤10Ω / sq.

[0014] By defining the process parameters and heat treatment conditions for electrochemical deposition, the appropriate selection of potential range, deposition time, temperature and deposition thickness can ensure that graphene oxide and pyrrole monomers form a uniform and dense conductive layer on the surface of polyester substrate.

[0015] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S2, the conductive core layer raw material is prepared by eddy current spinning wrapping process, in which graphene composite fiber and stainless steel fiber are wrapped at a wrapping ratio of 1:(2~6).

[0016] Vortex spinning is a spinning method that uses air vortices to cohede and twist fibers into yarn. During vortex spinning, fibers are drawn into a vortex tube and, under the action of the high-speed rotating vortex, intertwine to form yarn. Specifically: First, graphene composite fibers and stainless steel fibers are fed into the vortex spinning equipment separately. Then, under the action of the vortex, the stainless steel fiber acts as the main component, while the graphene composite fiber is uniformly wrapped around the surface of the stainless steel fiber in a 1:(2~6) ratio, forming a conductive core layer. This wrapping structure can fully utilize the performance advantages of both fibers, improving the conductivity and stability of the core layer.

[0017] Preferably, graphene composite fibers and stainless steel fibers are wrapped at a wrapping ratio of 1:4.

[0018] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S3, the functional skin material is prepared using a Siro compact spinning mixing process, in which at least two of the following fibers—polyimide fiber, calcium alginate fiber, and aramid fiber—are mixed with a twist coefficient of 300 to 500.

[0019] Siro compact spinning is a spinning technology that combines Siro spinning and compact spinning. It uses two rovings fed into a yarn drafting system, where both rovings are simultaneously drafted and combined into a yarn. During drafting, an airflow-gathering device causes the rovings to be tightly bundled by the airflow, effectively preventing the generation of free fibers.

[0020] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S3, polyimide fiber, calcium alginate fiber, and aramid fiber are mixed as functional skin material, wherein the mass ratio of polyimide fiber, calcium alginate fiber, and aramid fiber is (2~4):(1~3):1.

[0021] Polyimide fiber, calcium alginate fiber, and aramid fiber are each made into rovings, and then two rovings are simultaneously fed into the drafting system of a Siro compact spinning machine. During drafting, the two rovings are tightly bundled under the action of airflow and twisted at the twist coefficient, so that the three fibers are fully mixed to form a functional sheath material. Siro compact spinning technology can improve the strength, evenness, and hairiness control of the sheath, giving it better properties.

[0022] Preferably, polyimide fiber, calcium alginate fiber, and aramid fiber are mixed with a twist coefficient of 380.

[0023] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S4, the mass ratio of conductive core layer material to functional skin layer material is 1:(1~3).

[0024] The specifications define the mass ratio of conductive core material and functional skin material. A suitable ratio allows the fabric to have good conductivity while fully utilizing the multiple functions of the functional skin.

[0025] Preferably, the mass ratio of the conductive core material to the functional skin material is 2:3.

[0026] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S5, a warp knitting machine is used for weaving, with a surface layer density of 20-40 stitches / cm² and a spacer layer density of 10-20 stitches / cm².

[0027] It limits the range of surface layer density and spacer layer density when using a warp knitting machine, which is beneficial for forming a three-dimensional spacer fabric structure with good air permeability.

[0028] Preferably, the knitting is performed using a warp knitting machine, with a surface layer density of 30 stitches / cm² and a spacer layer density of 12 stitches / cm.

[0029] Furthermore, in the above-mentioned method for preparing conductive shielding fabric, in step S5, after weaving, a finishing process is performed, which includes the following: first, plasma treatment is performed in an Ar atmosphere at a power of 200-500W for 1-10 minutes; then, a two-step finishing process is performed, the first step being spraying an MXene dispersion, and the second step being padding a phase change microcapsule dispersion; wherein, the concentration of MXene in the MXene dispersion is 2-5 g / L, the spraying pressure is 0.1-0.5 MPa, the spraying distance is 10-30 cm, and the spraying speed is 5-20 cm / s; the concentration of phase change microcapsules in the phase change microcapsule dispersion is 5-10 g / L, using a two-dip, two-pad method, with a padding rate of 70-80%, and then drying at 80-100℃ for 2-5 minutes.

[0030] The woven fabric undergoes finishing processes including plasma treatment and a two-step finishing method. Plasma treatment enhances the activity of the fabric surface and strengthens the adhesion between subsequent finishing agents and the fabric. The two-step finishing process, involving spraying MXene dispersion and padding with phase change microcapsule dispersion, imparts self-cleaning and thermoregulatory properties to the fabric. Specifically, the MXene finishing layer imparts self-cleaning properties (water contact angle ≥150°), making the fabric surface less prone to staining and easier to clean. The phase change microcapsules (enthalpy ≥180J / g) enable thermoregulation; when body temperature rises, the microcapsules absorb heat and undergo a phase change, lowering the body temperature; when body temperature decreases, the microcapsules release heat, maintaining a stable body temperature. Simultaneously, the various process parameters for the finishing process are precisely defined to ensure the stability and consistency of the finishing effect.

[0031] Preferably, the post-treatment includes the following: first, plasma treatment is performed in an Ar atmosphere at a power of 300W for 5 minutes; then, a two-step finishing process is performed, the first step being spraying an MXene dispersion and the second step being padding a phase change microcapsule dispersion; wherein, the concentration of MXene in the MXene dispersion is 5 g / L, the spraying pressure is 0.3 MPa, the spraying distance is 20 cm, and the spraying speed is 10 cm / s; the concentration of phase change microcapsules (octadecane@SiO2) in the phase change microcapsule dispersion is 8 g / L, and a two-dip, two-pad method is used with a padding rate of 75%, and then drying is performed at 100℃ for 3 minutes.

[0032] This invention also relates to the application of the conductive shielding fabric prepared using the aforementioned method to the manufacture of electrostatic protective clothing. The various excellent properties of this fabric enable the electrostatic protective clothing to possess good conductive shielding performance, breathability, moisture wicking properties, self-cleaning properties, and body temperature regulation function.

[0033] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a method for preparing conductive shielding fabric and its application in electrostatic protective clothing. Graphene composite fibers are prepared by ultrasonically mixing graphene oxide dispersion with pyrrole monomer and electrochemically depositing the mixture onto the surface of a polyester substrate. Replacing some metal fibers with graphene composite fibers reduces the fabric's areal density and hardness while improving conductivity. A conductive core layer is prepared by wrapping graphene composite fibers with stainless steel fibers using an eddy spinning process. This wrapping structure fully utilizes the performance advantages of both fibers, improving the conductivity and stability of the core layer. Finally, a functional skin layer is prepared by mixing at least two of the following fibers—polyimide fiber, calcium alginate fiber, and aramid fiber—using a Siro compact spinning mixing process. The material enhances the strength, evenness, and hair control of the leather layer, resulting in superior performance. The core-shell structure of the blended yarn and the three-dimensional interlocking structure optimize the fabric's pore distribution, achieving directional breathability while ensuring the continuity of the conductive network, thus improving the fabric's conductivity and breathability. Post-processing imparts self-cleaning properties and thermoregulation, enhancing environmental adaptability and wearing comfort. When applied to electrostatic protective clothing, this fabric demonstrates excellent performance in practical use, reducing perceived temperature, increasing sweat evaporation rate, and maintaining shielding effectiveness, providing effective protection for wearers and meeting the needs of special working environments. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to Example 1 and Comparative Example 1, combined with specific experimental data. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Unless otherwise specified, the reagents, methods and equipment used in the embodiments of the present invention are conventional reagents, methods and equipment in this technical field.

[0035] The following Example 1 and Comparative Example 1 provide a method for preparing a conductive shielding fabric.

[0036] Example 1 The conductive shielding fabric of Example 1 is prepared by the following steps: S1: A graphene oxide dispersion was ultrasonically mixed with pyrrole monomer (C4H5N), wherein the concentration of graphene oxide (GtO1211) in the graphene oxide dispersion was 2.0 mg / mL, and the molar ratio of graphene oxide to pyrrole monomer was 1:100, to obtain a mixed solution; the mixed solution was deposited on the surface of a polyester substrate (ZW110) by electrochemical deposition, and the electrochemical deposition process parameters were: potential range 1.0 V, deposition time 20 min, temperature 25℃, and deposition thickness 200 nm; after heat treatment at 100℃ for 2 h, graphene composite fibers were obtained, and the surface resistivity of the graphene composite fibers was ≤10 Ω / sq; S2: The conductive core material is prepared by wrapping graphene composite fiber and stainless steel fiber (0.035 mm specification) at a wrapping ratio of 1:4 using eddy spinning wrapping process. S3: Using the Siro compact spinning blending process, polyimide fiber (brand name PL450C), calcium alginate fiber (purchased from Qingdao Jiulong Hairun Industry and Trade Co., Ltd.), and aramid fiber (aramid III) are mixed at a twist coefficient of 380 to obtain functional leather raw material. S4: The conductive core material and the functional skin material are fed into the drawing device respectively. The drawing device controls the feeding speed and tension of the conductive core material and the functional skin material according to the mass ratio of the conductive core material and the functional skin material of 2:3, so that the conductive core material is evenly coated on the surface of the functional skin material, forming a core-shell structure blended yarn with a conductive core layer and a functional skin layer. S5: The blended yarn was knitted using a warp knitting machine, with a surface layer density of 30 needles / cm² and a spacer layer density of 12 needles / cm, forming a three-dimensional spacer structure. After knitting, finishing was performed, including the following: First, plasma treatment was performed in an Ar atmosphere at a power of 300W for 5 minutes; then, a two-step finishing process was performed, the first step being spraying MXene dispersion and the second step being padding phase change microcapsule dispersion; wherein, the concentration of MXene (purchased from Xi'an Qiyue Biotechnology Co., Ltd.) in the MXene dispersion was 5 g / L, the spraying pressure was 0.3 MPa, the spraying distance was 20 cm, and the spraying speed was 10 cm / s; the concentration of phase change microcapsules (octadecane@SiO2, particle size 2 μm) in the phase change microcapsule dispersion was 8 g / L, and a two-dip, two-pad method was used, with a padding rate of 75%, and then dried at 100℃ for 3 minutes to obtain the conductive shielding fabric of Example 1.

[0037] Comparative Example 1 The conductive shielding fabric of Comparative Example 1, (1) Material composition: The conductive material is 100% stainless steel fiber (0.035 mm), the matrix fiber is polyester (grade ZW110), and the blending ratio is stainless steel fiber / polyester = 35:65 (mass ratio).

[0038] (2) Fabric structure: The fabric structure is a double-layer plain weave (area density 280g / m²), and the yarn configuration is stainless steel / polyester blended yarn (20S).

[0039] The conductive shielding fabric of Comparative Example 1 is prepared by the following steps: S1: Stainless steel fiber and polyester are blended using traditional ring spinning process (twist coefficient 420); S2: Plain weave base fabric using a rapier loom (speed 450rpm), with a warp and weft density of 28×24 threads / cm; S3: The plain weave base fabric was impregnated and padded with an antistatic agent (SX907). The antistatic agent was prepared as a treatment solution with a concentration of 30 g / L. The process was carried out by two dips and two paddeds with a padded rate of 80%. The fabric was then set at 120°C for 3 min to obtain the conductive shielding fabric of Comparative Example 1.

[0040] Effect verification The conductive shielding fabrics of Example 1 and Comparative Example 1 were subjected to performance tests, and the test results are shown in Table 1.

[0041] Table 1 Test items Example 1 Comparative Example 1 Test Standards Surface density (g / m²) 195 280 GB / T 4669-2008 Air permeability (mm / s) 820 350 ASTM D737 Surface resistivity (Ω / sq) 7.4 6.2 AATCC 76-2016 Bending stiffness (mN·cm) 12.8 45.6 GB / T 18318-2017 Heat stress index 2.1 4.8 ISO 7933 Table 1 shows that traditional stainless steel fibers have a high density, resulting in stiff fabrics and poor breathability. Example 1, however, uses graphene composite fibers to replace some of the stainless steel fibers, reducing surface resistance and surface density. Furthermore, Example 1 employs a three-dimensional spacer structure, further improving breathability. While Comparative Example 1 has a lower surface resistance, this is due to the good conductivity of stainless steel fibers. Example 1, using graphene composite fibers, prioritizes balancing conductivity and other properties, reducing weight and increasing comfort. Example 1 has a low heat stress index, indicating better breathability and moisture wicking, resulting in a lower perceived temperature, longer wearing time, and faster perspiration.

[0042] The performance of the electrostatic protective clothing made from the conductive shielding fabric of Example 1 was tested, and the test results are shown in Table 2.

[0043] Table 2 Test items Test Results Standard requirements Shielding effectiveness (100kHz-1GHz) 56-68dB ≥50dB (IEEE 299-1997) Breakdown voltage 48kV ≥30kV (GB 12014-2009) <![CDATA[Charge decay rate (t1 / 2)]]> 0.35s ≤2.0s (EN 1149) Furthermore, the phase change microcapsules trigger temperature regulation at around 34°C, ensuring that the temperature fluctuation inside the anti-static protective suit is less than 0.8°C. The Mxene coating on the anti-static protective suit provides an oil contact angle of 158°, improving self-cleaning efficiency.

[0044] In addition, the electrostatic protective clothing made with the conductive shielding fabric of Example 1 underwent a 2000-hour field test at a converter station of the State Grid Corporation of China. The test results are as follows: (1) The average number of electrostatic discharges per day decreased from 14.3 times to 0.7 times.

[0045] (2) The average skin temperature of the workers decreased by 3.8℃ (infrared thermal imaging data).

[0046] (3) After 30 industrial washes, the shielding effectiveness was maintained at 92.6%.

[0047] In summary, this invention solves the problems of traditional conductive shielding fabrics through innovative material systems, structural designs, and manufacturing processes, improving the breathability, moisture absorption and wicking properties, environmental adaptability, and durability of conductive shielding fabrics, and has broad application prospects in fields such as electrostatic protective clothing.

[0048] This invention has many specific applications, and the above description is only a preferred embodiment. It should be noted that the above embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this invention. For those skilled in the art, several improvements can be made without departing from the principle of this invention, and these improvements should also be considered within the scope of protection of this invention.

Claims

1. A method for preparing a conductive shielding fabric, characterized in that, Includes the following steps: S1: The graphene oxide dispersion and pyrrole monomer were ultrasonically mixed to obtain a mixture; the mixture was deposited on the surface of a polyester substrate by electrochemical deposition, and after heat treatment, graphene composite fiber was obtained. S2: Graphene composite fibers are wrapped with stainless steel fibers to obtain conductive core material. S3: Mix at least two types of fibers, including polyimide fiber, calcium alginate fiber, and aramid fiber, to obtain a functional skin material; S4: The conductive core material and the functional skin material are fed into the drawing device respectively. The drawing device controls the feeding speed and tension of the conductive core material and the functional skin material according to the preset ratio requirements, so that the conductive core material is evenly coated on the surface of the functional skin material, forming a core-shell structure blended yarn with a conductive core layer and a functional skin layer as the outer layer. S5: The blended yarn is woven using a warp knitting machine to produce an conductive shielding fabric.

2. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S1, the concentration of graphene oxide in the graphene oxide dispersion is 0.5~3 mg / mL; the molar ratio of graphene oxide to pyrrole monomer is 1:(80~120).

3. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S1, the electrochemical deposition process parameters are: potential range 0.6~1.2 V, deposition time 15~30 min, temperature 20~30℃, deposition thickness 100~500 nm; heat treatment at 100~120℃ for 1~3 h; surface resistance of graphene composite fiber ≤10Ω / sq.

4. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S2, the conductive core layer material is wrapped using an eddy current spinning process, in which graphene composite fibers and stainless steel fibers are wrapped at a wrapping ratio of 1:(2~6).

5. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S3, the functional skin material is produced by Siro compact spinning and mixing process, in which at least two of the following fibers, namely polyimide fiber, calcium alginate fiber and aramid fiber, are mixed with a twist coefficient of 300 to 500.

6. The method for preparing the conductive shielding fabric according to claim 5, characterized in that, In S3, polyimide fiber, calcium alginate fiber, and aramid fiber are mixed as functional skin material, wherein the mass ratio of polyimide fiber, calcium alginate fiber, and aramid fiber is (2~4):(1~3):

1.

7. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S4, the mass ratio of the conductive core material to the functional skin material is 1:(1~3).

8. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In S5, a warp knitting machine is used for knitting, with a surface layer density of 20-40 stitches / cm² and a spacer layer density of 10-20 stitches / cm².

9. The method for preparing the conductive shielding fabric according to claim 1, characterized in that, In step S5, after weaving, a finishing process is performed, which includes the following: first, plasma treatment is performed in an Ar atmosphere at a power of 200-500W for 1-10 minutes; then, a two-step finishing process is performed, the first step being spraying an MXene dispersion and the second step being padding a phase change microcapsule dispersion; wherein, the concentration of MXene in the MXene dispersion is 2-5 g / L, the spraying pressure is 0.1-0.5 MPa, the spraying distance is 10-30 cm, and the spraying speed is 5-20 cm / s; the concentration of phase change microcapsules in the phase change microcapsule dispersion is 5-10 g / L, using a two-dip, two-pad method, with a padding rate of 70-80%, and then drying at 80-100℃ for 2-5 minutes.

10. The application of a conductive shielding fabric in electrostatic protective clothing, characterized in that, The conductive shielding fabric is prepared using the method described in any one of claims 1 to 9.