High-strength high-specific-surface-area activated carbon fiber cloth and preparation method and application thereof

Abstract

The application discloses high-strength high-specific-surface-area activated carbon fiber cloth and a preparation method and application thereof. The activated carbon fiber cloth is woven by polyacrylonitrile pre-oxidized fibers and metal fibers; the metal fibers are composed of polyacrylonitrile pre-oxidized fibers and a metal layer coated on the surfaces of the polyacrylonitrile pre-oxidized fibers. The activated carbon fiber cloth has the advantages of high strength, high specific surface area, low powderization degree, good adsorption performance, mechanical performance and antibacterial performance. The preparation method is simple in operation, does not need to change existing activated carbon fiber cloth production equipment, thus reducing cost, and has high practical value and economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of activated carbon fiber cloth technology, specifically relating to a high-strength, high-specific-surface-area activated carbon fiber cloth, its preparation method, and its application. Background Technology

[0002] Activated carbon fiber (ACF) is an adsorption material with a large specific surface area, abundant micropores, easy contact with adsorbates, low diffusion resistance, and fast adsorption-desorption rates. It possesses high technological content and high added value. Industrialized activated carbon fiber products are represented by polyacrylonitrile (PAN)-based activated carbon fiber. PAN-based activated carbon fiber is produced from fibrous precursors through a specific carbonization and activation process. Due to the presence of a large number of nitrogen-containing heteroatoms in the PAN-based raw materials, its well-developed specific surface area and narrow pore size distribution result in a fast adsorption-desorption rate and a large adsorption capacity.

[0003] CN106702538A discloses a method for preparing high-performance activated carbon fibers. This patent uses polyacrylonitrile precursor fibers to produce pre-oxidized fiber filaments. Under certain activation temperature conditions, by controlling the proportion of water vapor in a single physical or physicochemical activation process, activated carbon fibers with a certain specific surface area and strength are prepared. This method uses unwoven fiber bundles to prepare activated carbon fibers with good strength in a laboratory furnace. However, in the industrial-scale production process of weaving the fiber filaments into fiber cloth, the fibers aggregated into cloth release a large amount of heat in a short time, easily causing severe etching and pulverization of the fiber surface. This industrial problem has not yet been solved.

[0004] CN101660254A discloses a continuous preparation method for activated carbon fiber cloth with high tensile strength and elongation at break, but the method uses a horizontal furnace and carbon dioxide activation gas, resulting in a violent reaction, strict atmosphere control, and high difficulty in control.

[0005] CN115404569A discloses a continuous production method for PAN-based ACF containing protective propyl sulfide using a vertical carbon activation furnace to prepare activated carbon fiber cloth. The activated carbon fiber cloth prepared by this method has low strength, is easy to break, has uneven temperature distribution, and is easily pulverized.

[0006] In summary, existing activated carbon fiber cloths suffer from insufficient strength, susceptibility to breakage, and severe pulverization during use. Therefore, a new preparation process needs to be developed to improve the strength and durability of activated carbon fiber cloths without altering the equipment, in order to meet the demands of practical applications. Summary of the Invention

[0007] The purpose of this invention is to provide an activated carbon fiber cloth, its preparation method, and its applications. The activated carbon fiber cloth possesses advantages such as high strength, high specific surface area, low degree of powdering, good adsorption and mechanical properties, and antibacterial properties. The preparation method is simple to operate and requires no modification to existing activated carbon fiber cloth production equipment, thus reducing costs and possessing high practical value and economic benefits.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] In a first aspect, the present invention provides an activated carbon fiber cloth, which is woven from polyacrylonitrile pre-oxidized fibers and metal fibers;

[0010] The metal fiber consists of pre-oxidized polyacrylonitrile fiber and a metal layer covering its surface.

[0011] The weight ratio of the pre-oxidized polyacrylonitrile fiber to the metal fiber is 50:50-95:5, preferably 50:50-85:15.

[0012] The thickness of the metal layer is 50-200 nm, preferably 50-100 nm.

[0013] The metal includes at least copper.

[0014] The metal also includes non-copper metals; the non-copper metals are one or more of silver, aluminum, zinc, chromium and nickel; the weight ratio of copper to the non-copper metal is 80:20-99:1, preferably 80:20-95:5.

[0015] The metal fiber is obtained by metal plating on the surface of the polyacrylonitrile pre-oxidized fiber; the metal plating can be electroplating or chemical plating, as long as a stable and dense metal layer can be formed on the surface of the polyacrylonitrile pre-oxidized fiber.

[0016] Secondly, the present invention provides a method for preparing the activated carbon fiber cloth, comprising the following steps:

[0017] The pre-oxidized polyacrylonitrile fiber and the metal fiber are blended into yarn and woven. The resulting fabric is then carbonized, reduced, and activated to obtain the activated carbon fiber cloth.

[0018] The warp and weft yarns used in the weaving are both obtained by blending the pre-oxidized polyacrylonitrile fiber and the metal fiber.

[0019] For example, the warp is made by mixing the pre-oxidized polyacrylonitrile fiber and the metal fiber in a weight ratio of 50:50-85:15; the weft is made by blending the pre-oxidized polyacrylonitrile fiber and the metal fiber in a weight ratio of 80:20-98:2.

[0020] The weaving can be performed using conventional weaving methods in the art, such as machine weaving or knitting.

[0021] The reduction is carried out by immersing the carbonized fabric sample in a solution containing a reducing agent.

[0022] The reducing agent is one or more of ascorbic acid, sodium ascorbate, tartaric acid, sodium tartrate, and potassium sodium tartrate.

[0023] The concentration of the solution is 0.1-1 mmol / L, preferably 0.12-0.3 mmol / L.

[0024] The pH of the solution is 4.0-6.0, preferably 5.0-5.75.

[0025] The carbonization process conditions are as follows: the protective gas is an inert gas, exemplarily nitrogen, and the flow rate of the protective gas is 100-110 cm⁻¹. 3 / min, preferably 102-108cm 3 / min; The carbonization furnace is divided into four temperature zones: the first temperature zone is 350-400℃, preferably 350-380℃, the second temperature zone is 450-500℃, preferably 450-470℃, the third temperature zone is 550-600℃, preferably 550-560℃, and the fourth temperature zone is 650-720℃, preferably 700-710℃.

[0026] The activation process conditions are as follows: the activation gas is water vapor, and the flow rate of the activation gas is 15-25 g / min, preferably 20-22 g / min; the activation furnace is a horizontal structure, divided into three temperature zones: the first temperature zone is 450-500℃, preferably 480-510℃; the second temperature zone is 800-900℃, preferably 850-860℃; and the third temperature zone is 800-900℃, preferably 850-860℃.

[0027] During the carbonization, reduction, and activation processes, the fabric traction speed is 0.1-1 m / min, preferably 0.1-0.3 m / min.

[0028] Thirdly, the present invention further provides the application of the activated carbon fiber cloth in personal protective products (masks, insoles), air purification equipment, water treatment equipment, and adsorption materials.

[0029] The beneficial effects achieved by this invention are as follows:

[0030] 1. The metal in the metal fiber of the present invention preferentially reacts with oxygen to generate metal oxides during the carbonization process, which can consume the residual oxygen in the fabric microenvironment. After the carbonized fabric is impregnated in the reducing solution, copper oxide can be reduced to cuprous oxide or copper. Cuprous oxide is relatively stable under high temperature activation environment, and copper can continue to consume oxygen in the microenvironment. Through the above two oxygen consumption methods, the oxygen content in the microenvironment can be significantly reduced, thereby reducing the occurrence of ablation and stiffness, and effectively improving the quality of activated carbon fiber cloth.

[0031] 2. After the carbonized fabric is immersed in the reducing solution, copper oxide can be reduced to cuprous oxide, and the resulting cuprous oxide also has excellent antibacterial properties.

[0032] 3. The metal fibers of the present invention have good thermal conductivity, resulting in a more uniform temperature distribution during weaving, and a more uniform degree of carbonization and activation, thereby reducing the occurrence of pulverization.

[0033] 4. The reducing reagent used in this invention reacts with oxygen to generate carbon dioxide and water vapor in an activation environment. The carbon dioxide and water vapor are then added to the activator gas to form an activation atmosphere with two activators, which further improves the quality of the activated carbon fiber cloth.

[0034] 4. The preparation method provided by this invention can employ a conventional horizontal carbonization furnace or activation furnace. The waste gas generated by the carbonization furnace is extracted by a gas extraction device. Due to its high temperature, the extracted gas can be used for the preheating process of the activator water vapor, achieving recycling and improving production efficiency.

[0035] In summary, the activated carbon fiber cloth provided by this invention has a radial tensile strength greater than 250 N, a weft tensile strength greater than 150 N, a yield greater than 35%, and a specific surface area of ​​up to 1200 m². 2 With a particle size of over / g, it possesses advantages such as low powdering degree, large specific surface area, high strength, high thermal adsorption capacity, good mechanical properties, and good antibacterial properties. Its preparation method is simple to operate and requires no modification to existing activated carbon fiber cloth production equipment, thus reducing costs and demonstrating high practical value and economic benefits. Attached Figure Description

[0036] Figure 1 The image shows a scanning electron microscope (SEM) image of the activated carbon fiber cloth prepared in Example 2.

[0037] Figure 2 The image shown is a scanning electron microscope image of the activated carbon fiber cloth prepared in Example 3.

[0038] Figure 3 The isothermal adsorption lines of the activated carbon fiber cloth in Example 1 and Comparative Example 2 are shown. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following embodiments.

[0040] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.

[0041] Unless otherwise specified, all reagents, materials, instruments, etc. used in the following examples are commercially available.

[0042] The polyacrylonitrile pre-oxidized fibers used in the following examples were purchased from Jilin Chemical Fiber Group Co., Ltd.

[0043] Example 1

[0044] The steps are as follows:

[0045] Step 1: Copper is plated on the surface of pre-oxidized polyacrylonitrile fibers with a coating thickness of 50-70 nm to obtain copper-plated fibers;

[0046] Step 2: The yarn is spun in a 50:50 ratio of pre-oxidized polyacrylonitrile fiber to copper-plated fiber in the radial direction and in an 80:20 ratio of pre-oxidized polyacrylonitrile fiber to copper-plated fiber in the weft direction. Finally, the fabric is obtained through weaving.

[0047] The resulting fabric has a weight of 373 g / m². 2 The fracture strength is: 553 N in the radial direction and 497 N in the latitudinal direction.

[0048] Step 3: The blended fabric is fed into a carbonization furnace via a traction column to carbonize it, resulting in carbonized fabric.

[0049] The traction speed is 0.1 m / min, nitrogen is used as the protective gas, and the gas flow rate is controlled at 105 cm / min. 3 The carbonization furnace is divided into four temperature zones: the first zone has a temperature of 350±10℃, the second zone has a temperature of 450±10℃, the third zone has a temperature of 550±10℃, and the fourth zone has a temperature of 700±10℃.

[0050] Step 4: The carbonized fabric from the carbonization furnace is cooled and then enters the reducing solution through a traction column for ultrasonic impregnation.

[0051] The traction speed was 0.1 m / min; the reducing solution was a mixed solution containing low concentrations of ascorbic acid and sodium ascorbate, with ascorbic acid concentration of 0.15 ± 0.02 mmol / L and sodium ascorbate concentration of 0.2 ± 0.02 mmol / L; the pH of the reducing solution was controlled by an automatic adjustment device at 5.75 ± 0.05. The ultrasonic conditions were: ultrasonic power 2000 W and residence time 20 min.

[0052] Step 5: The impregnated fabric is then fed into the activation furnace via a traction column for activation;

[0053] The traction speed is 0.1 m / min, the activation is carried out using steam, and the activation gas flow rate is 20 g / min. The activation furnace is a horizontal structure, divided into three temperature zones: the first temperature zone is 480±10℃, the second temperature zone is 850±10℃, and the third temperature zone is 850±10℃.

[0054] Step 6: Use cleaning equipment to rinse and dry the activated fabric.

[0055] Example 2

[0056] The steps are as follows:

[0057] Step 1: Copper is plated on the surface of pre-oxidized polyacrylonitrile fiber with a coating thickness of 60-80 nm to obtain copper-plated fiber; separately, pre-oxidized polyacrylonitrile fiber is plated with aluminum with a coating thickness of 60-80 nm to obtain aluminum-plated fiber.

[0058] Step 2: The yarn is spun in the radial direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 72:28, with m(copper-plated fiber):m(aluminized fiber) = 85:15 in the total metal fiber. The yarn is then spun in the weft direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 92:8, with m(copper-plated fiber):m(aluminized fiber) = 85:15 in the total metal fiber. Finally, the fabric is obtained through a weaving process.

[0059] The resulting fabric has a weight of 355 g / m². 2 The breaking strength is: 570N in the radial direction and 490N in the latitudinal direction.

[0060] Step 3: The blended fabric is fed into a carbonization furnace via a traction column to carbonize it, resulting in carbonized fabric.

[0061] The traction speed is 0.15 m / min, nitrogen is used as the protective gas, and the gas flow rate is controlled at 102 cm / min. 3 The carbonization furnace is divided into four temperature zones: the first zone has a temperature of 370±10℃, the second zone has a temperature of 460±10℃, the third zone has a temperature of 560±10℃, and the fourth zone has a temperature of 700±10℃.

[0062] Step 4: The carbonized fabric from the carbonization furnace, after cooling, is drawn into a reducing solution via a traction column for ultrasonic impregnation. The ultrasonic conditions are: ultrasonic power 2000W, residence time 20 minutes.

[0063] The traction speed is 0.15 m / min; the reducing solution is a mixed solution containing low concentrations of ascorbic acid and sodium ascorbate, with the concentration of ascorbic acid being 0.12±0.02 mmol / L and the concentration of sodium ascorbate being 0.13±0.02 mmol / L; and the pH of the reducing solution is controlled by an automatic adjustment device to be 5.70±0.05.

[0064] Step 5: The impregnated fabric is then fed into the activation furnace via a traction column for activation;

[0065] The traction speed is 0.15 m / min, the activation is carried out using steam, and the activation gas flow rate is 20 g / min. The activation furnace is a horizontal structure and is divided into three temperature zones: the first temperature zone is 500±10℃, the second temperature zone is 860±10℃, and the third temperature zone is 860±10℃.

[0066] Step 6: Use cleaning equipment to rinse and dry the activated fabric.

[0067] Example 3

[0068] The steps are as follows:

[0069] Step 1: Copper is plated on the surface of pre-oxidized polyacrylonitrile fiber with a coating thickness of 70-100 nm to obtain copper-plated fiber; another pre-oxidized polyacrylonitrile fiber is plated with silver metal with a coating thickness of 70-100 nm to obtain silver-plated fiber.

[0070] Step 2: The yarn is spun in a radial direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 85:15, where m(copper-plated fiber):m(silver-plated fiber) = 80:20. The yarn is also spun in a weft direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 85:15, where m(copper-plated fiber):m(silver-plated fiber) = 85:15. Finally, the fabric is obtained through a weaving process.

[0071] The resulting fabric has a weight of 345 g / m². 2 The breaking strength is: 510N in the radial direction and 465N in the latitudinal direction.

[0072] Step 3: The blended fabric is fed into a carbonization furnace via a traction column to carbonize it, resulting in carbonized fabric.

[0073] The traction speed is 0.3 m / min, nitrogen is used as the protective gas, and the gas flow rate is controlled at 108 cm. 3 The carbonization furnace is divided into four temperature zones: the first zone has a temperature of 380±10℃, the second zone has a temperature of 470±10℃, the third zone has a temperature of 560±10℃, and the fourth zone has a temperature of 710±10℃.

[0074] Step 4: The carbonized fabric from the carbonization furnace, after cooling, is drawn into a reducing solution via a traction column for ultrasonic impregnation. The ultrasonic conditions are: ultrasonic power 2000W, residence time 20 minutes.

[0075] The traction speed was 0.3 m / min, the reducing solution was a mixed solution containing tartaric acid and sodium ascorbate, the concentration of tartaric acid was 0.21±0.02 mmol / L, the concentration of sodium ascorbate was 0.30±0.02 mmol / L, and the pH of the reducing solution was controlled by an automatic adjustment device to be 5.00±0.05.

[0076] Step 5: The impregnated fabric is then fed into the activation furnace via a traction column for activation;

[0077] The traction speed is 0.3 m / min, the activation is carried out by steam, the activation gas flow rate is 22 g / min, the activation furnace is a horizontal structure, and it is divided into three temperature zones: the first temperature zone is 510±10℃, the second temperature zone is 860±10℃, and the third temperature zone is 860±10℃.

[0078] Step 6: Use cleaning equipment to rinse and dry the activated fabric.

[0079] Example 4

[0080] The steps are as follows:

[0081] Step 1: Copper is plated on the surface of pre-oxidized polyacrylonitrile fibers with a coating thickness of 50-70 nm to obtain copper-plated fibers; zinc metal is plated on the surface of pre-oxidized polyacrylonitrile fibers with a coating thickness of 50-70 nm to obtain zinc-plated fibers.

[0082] Step 2: The yarn is spun in the radial direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 66:34, with m(copper-plated fiber):m(plated fiber) = 90:10 in the total metal fiber. The yarn is then spun in the weft direction using a blend of m(pre-oxidized polyacrylonitrile fiber):m(total metal fiber) = 85:15, with m(copper-plated fiber):m(zinc-plated fiber) = 95:5 in the total metal fiber. Finally, the fabric is obtained through a weaving process.

[0083] The resulting fabric has a weight of 342 g / m². 2 The fracture strength is: 553 N in the radial direction and 497 N in the latitudinal direction.

[0084] Step 3: The blended fabric is fed into a carbonization furnace via a traction column to carbonize it, resulting in carbonized fabric.

[0085] The traction speed is 0.2 m / min, nitrogen is used as the protective gas, the gas flow rate is controlled at 106 cm3 / min, and the carbonization furnace is divided into four temperature zones: the first temperature zone is 350±10℃, the second temperature zone is 450±10℃, the third temperature zone is 560±10℃, and the fourth temperature zone is 710±10℃.

[0086] Step 4: The carbonized fabric from the carbonization furnace is cooled and then enters the reducing solution through a traction column for ultrasonic impregnation.

[0087] The traction speed is 0.2 m / min, the reducing solution is a mixed solution of low concentration ascorbic acid and sodium ascorbate, the concentration of ascorbic acid is 0.15±0.02 mmol / L, the concentration of sodium ascorbate is 0.2±0.02 mmol / L, and the pH of the reducing solution is controlled by an automatic adjustment device to be 5.75±0.05.

[0088] Step 5: The impregnated fabric is then fed into the activation furnace via a traction column for activation;

[0089] The traction speed is 0.2 m / min, the activation is carried out using steam, the activation gas flow rate is 22 g / min, the activation furnace is a horizontal structure, and it is divided into three temperature zones: the first temperature zone is 510±10℃, the second temperature zone is 860±10℃, and the third temperature zone is 860±10℃.

[0090] Step Six: After the fabric is activated, rinse it with a cleaning device and then dry it.

[0091] Effect verification

[0092] 1. Microstructure:

[0093] Figure 1 , Figure 2 Scanning electron microscope (SEM) images of the activated carbon fiber cloth obtained in Examples 2 and 3 are shown below. Figure 1 , Figure 2 As shown, the surface of the activated carbon fiber prepared by this invention has obvious grooves composed of micropores.

[0094] 2. Antibacterial test

[0095] The antibacterial properties of the activated carbon fiber cloth obtained in Example 2 were tested.

[0096] Test method: According to GB / T 20944.2-2007 "Evaluation of antimicrobial properties of textiles" Part 2: Absorption method, the control sample is 100% pure cotton fabric, Ct is the average number of bacteria (CFU) measured after 24 hours of inoculation and incubation of the three control samples, C0 is the average number of bacteria (CFU) measured immediately after inoculation of the three control samples, F is the bacterial growth value of the control sample, F = lgCt - lgC0, Tt is the average number of bacteria (CFU) measured after 24 hours of inoculation and incubation of the three test samples.

[0097] A represents the bacterial growth value of the control sample. F = lgCt - lgTt, and the inhibition rate is (Ct - Tt) × 100% / Ct. According to the evaluation criteria for antibacterial effect in GB / T20944.2-2007: when the inhibition value is ≥1 or the inhibition rate is ≥90%, the sample has an antibacterial effect; when the inhibition value is ≥2 or the inhibition rate is ≥99%, the sample has a good antibacterial effect.

[0098] The results are shown in the table below.

[0099] Table 1. Results of antibacterial performance testing of the activated carbon fiber cloth obtained in Example 2.

[0100] Detection of bacterial species Escherichia coli 8099 Inoculated bacterial concentration (CFU / mL) <![CDATA[1.9×10 5 ]]> F 4.1 Ct(CFU) <![CDATA[5.3×10 8 ]]> C0(CFU) <![CDATA[3.7×10 4 ]]> Tt(CFU) <![CDATA[1.7×10 6 ]]> Antibacterial value A 2.5 Inhibition rate (%) >99 evaluate Meets the criteria: Has good antibacterial effect

[0101] 3. Mechanical properties, specific surface area, and yield

[0102] Comparative Example 1: The difference from Example 1 is that the reducing agent impregnation step is omitted.

[0103] Comparative Example 2: Commercially available polyacrylonitrile (PAN) based activated carbon fiber cloth.

[0104] Table 2. Basic properties of the activated carbon fiber cloths obtained in Examples 1-4

[0105] sample Fracture strength (radial) N Fracture strength (latitudinal) N <![CDATA[Specific surface area m 2 / g]]> Yield % Example 1 320 160 1312 42 Example 2 310 157 1413 35.1 Example 3 340 180 1355 37.3 Example 4 390 165 1427 40.4 Comparative Example 1 275 111 1213 33％ Comparative Example 2 178 35 871 /

[0106] As shown in Table 2, compared with Comparative Example 1, the activated carbon fiber cloth with added copper fiber exhibits significantly improved tensile strength and specific surface area. Adding a reducing agent impregnation step further enhances the yield, strength, and specific surface area. This demonstrates that the present invention, using polyacrylonitrile pre-oxidized fiber as the matrix, and by adjusting the blending ratio and employing a specific impregnation treatment, can significantly improve the mechanical properties and specific surface area of ​​activated carbon fibers, thereby improving their adsorption performance and reducing powdering. Simultaneously, the yield is high, meeting the requirements of industrial production.

[0107] 4. Adsorption performance

[0108] Figure 3The isothermal adsorption curves of the activated carbon fiber cloths in Examples 1 and 2 are shown in the figure. As can be seen, when the relative partial pressure p∶p0≤0.1, the adsorption capacity is essentially saturated. This indicates that the adsorption of the activated carbon fiber cloth is monolayer adsorption, with most of the pores being microporous. The adsorption capacity of Example 1 is significantly higher than that of commercially available polyacrylonitrile-based activated carbon fiber cloth. This further demonstrates that the present invention, using pre-oxidized polyacrylonitrile fiber as the matrix, significantly improves the adsorption performance of activated carbon fibers by adding a metal layer, adjusting the blending ratio, and employing a specific impregnation treatment. Similarly, the activated carbon fiber cloths obtained in Examples 2-4 also exhibit similarly high adsorption capacities.

[0109] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for producing a high-strength high-surface-area activated carbon fiber sheet, characterized by: It comprises the following steps: The polyacrylonitrile pre-oxidized fiber and the metal fiber are blended into threads for weaving, and the obtained fabric is carbonized, reduced, and activated to obtain the activated carbon fiber cloth; The metal in the metal fiber reacts with oxygen to form metal oxide in the carbonization process, and consumes the residual oxygen in the micro-environment of the fabric; after the obtained carbonized fabric is immersed in a solution containing a reducing agent, copper oxide is reduced to cuprous oxide or copper, and copper continues to consume oxygen in the micro-environment; through the above two oxygen consumption methods, the oxygen content in the micro-environment is reduced, and the occurrence of ablation and rigidity is reduced; The metal fiber is composed of polyacrylonitrile pre-oxidized fiber and a metal layer coated on the surface thereof; The weight ratio of the polyacrylonitrile pre-oxidized fiber to the metal fiber is (50:50)-(95:5); The metal at least includes copper; the metal further includes a non-copper metal; the weight ratio of the copper to the non-copper metal is (80:20)-(99:1); The reduction is performed by immersing the carbonized fabric in a solution containing a reducing agent; The reducing agent is one or more of ascorbic acid, sodium ascorbate, tartaric acid, sodium tartrate, and potassium sodium tartrate; The process conditions for carbonization are as follows: The protective gas is an inert gas, the flow rate of the protective gas is 100-110 cm 3 / min; The carbonization temperature zones are as follows: the first temperature zone is 350-400℃, the second temperature zone is 450-500℃, the third temperature zone is 550-600℃, and the fourth temperature zone is 650-720℃; The process conditions for activation are as follows: The activation gas is water vapor, and the flow rate of the activation gas is 15-25 g / min; The activation temperature zones are as follows: the first temperature zone is 450-500℃, the second temperature zone is 800-900℃, and the third temperature zone is 800-900℃.

2. The method for preparing high-strength, high-specific-surface-area activated carbon fiber cloth according to claim 1, characterized in that: The thickness of the metal layer is 50-200 nm.

3. The method for preparing high-strength, high-specific-surface-area activated carbon fiber cloth according to claim 1, characterized in that: The non-copper metal is one or more of silver, aluminum, zinc, chromium, and nickel.

4. The method for preparing high-strength, high-specific-surface-area activated carbon fiber cloth according to claim 1, characterized in that: Both the warp and weft used for weaving are obtained by blending the polyacrylonitrile pre-oxidized fiber and the metal fiber.

5. The method for preparing high-strength, high-specific-surface-area activated carbon fiber cloth according to claim 1, characterized in that: The concentration of the solution is 0.1-1 mmol / L, and the pH of the solution is 4.0-6.

0.

6. The high-strength high-specific surface area activated carbon fiber cloth obtained by the preparation method of any one of claims 1-5.

7. The application of the high-strength high-specific surface area activated carbon fiber cloth of claim 6 in individual protection products, air purification equipment, water treatment equipment, and adsorption materials.

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