A protective curtain made of activated carbon meltblown fabric and its preparation method

Abstract

This invention relates to an activated carbon meltblown fabric for protective curtains and its preparation method, belonging to the field of functional fabric technology. The meltblown fabric comprises, by weight percentage: 4.5-7.5 wt% modified activated carbon, 1.2-1.8 wt% electret agent, 0.1-0.15 wt% antioxidant, 0.1-0.2 wt% nucleating agent, and 0.2-0.35 wt% lubricant, with the balance being high melt flow index polypropylene. The modified activated carbon uses ultrafine activated carbon as a carrier and a thioalkyl coupling agent as a bridging material. Titanium oxide is captured by in-situ hydrolysis and combined with activated carbon, followed by quaternization treatment to form a complex. Its surface long-chain alkyl groups improve the compatibility between activated carbon and the polypropylene matrix, enhancing the porosity, adsorption capacity, and antibacterial properties of the meltblown fabric.

Description

Technical Field

[0001] This invention belongs to the field of functional fabric technology, specifically, it relates to an activated carbon meltblown fabric for protective curtains and its preparation method. Background Technology

[0002] Meltblown fabric is made by stretching a fine stream of polymer melt extruded from a spinneret using a high-speed hot air stream, thereby forming ultrafine fibers that are collected on a condensing screen or roller and bonded together to become a meltblown nonwoven fabric. Its unique capillary structure of ultrafine fibers increases the number of fibers and surface area per unit area, thus giving meltblown fabric excellent air filtration properties, making it the most widely used fabric in masks.

[0003] Protective curtains are generally used as partitions between beds in hospital wards, primarily to protect patient privacy. They also function similarly to masks, helping to prevent the spread of pathogens. With increasing demands on the medical environment, functional protective curtains are becoming more common. For example, deodorizing curtains are widely used to prevent discomfort from excrement or medication odors; and in infectious disease wards, antibacterial curtains are also used to prevent cross-infection among patients.

[0004] Beyond the medical field, curtains in homes serve not only as sunshade decorations but also as barriers separating indoors and outdoors. Especially in recent years, with the frequent outbreaks of influenza, functional protective curtains have increasingly been used in home decoration. Activated carbon has a large specific surface area and strong adsorption capacity. Current technology combines it with traditional curtain materials to create composite curtains with a certain degree of odor removal. However, as a rigid material, the introduction of activated carbon into polymer materials is a defect, disrupting the continuity of the polymer and causing a deterioration in mechanical properties. Furthermore, its poor compatibility with polymer curtain materials exacerbates this deterioration. Particularly in meltblown fabric, the small diameter of the meltblown fibers makes it easier for segregated activated carbon to cause localized deterioration, affecting the mechanical strength of the meltblown fabric and significantly limiting its application and service life. Summary of the Invention

[0005] In order to solve the technical problems mentioned in the background art, the purpose of this invention is to provide activated carbon meltblown fabric for protective curtains and its preparation method.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An activated carbon meltblown fabric for protective curtains comprises, by weight percentage:

[0008] Modified activated carbon 4.5-7.5 wt%, electret agent 1.2-1.8 wt%, antioxidant 0.1-0.15 wt%, nucleating agent 0.1-0.2 wt%, and lubricant 0.2-0.35 wt%, with the balance being high melt index polypropylene.

[0009] Modified activated carbon is made by the following method:

[0010] Step A1: Mix diallylamine, epoxy accelerator DMP-30 and dioxane, purge with dry nitrogen, control the temperature in an oil bath at 75-85℃, stir at 120-180 rpm, slowly add silane coupling agent KH560, control the total reaction time to 1.2-1.6 h, remove dioxane by rotary evaporation under reduced pressure after the reaction is completed, and obtain dienylated coupling agent;

[0011] Furthermore, the ratio of diallylamine, silane coupling agent KH560, epoxy accelerator DMP-30, and dioxane is 0.1 mol: 0.102-0.105 mol: 0.15-0.2 g: 50-70 mL. Epoxy accelerator DMP-30 acts as a ring-opening catalyst, promoting the ring-opening reaction between the epoxy structure of silane coupling agent KH560 and diallylamine, introducing a diene structure to the molecular end of silane coupling agent KH560.

[0012] Step A2: Mix the diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone, and apply at 150-200 W / m 2 The reaction was carried out under ultraviolet irradiation with stirring at 60-90 rpm and refluxed for 2.5-3 hours. After the reaction was completed, acetone was removed by rotary evaporation to obtain the thioalkyl coupling agent.

[0013] Furthermore, the ratio of diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone is 0.1 mol: 0.205-0.21 mol: 15-20 mg: 120-150 mL. Dimethylphenylphosphine initiates the click addition of the active thiol group of n-octyl mercaptan to the double bond of the diene coupling agent, forming an alkyl modification with a sulfur-nitrogen structure.

[0014] Step A3: Mix the thioalkyl coupling agent, dimethylacetamide and deionized water, add activated carbon powder, and slowly add titanium tetrachloride while maintaining ultrasonic dispersion. Control the total reaction time to 1.5-2 hours. After the reaction is completed, neutralize with ammonia water, centrifuge and dry the bottom precipitate to obtain double-loaded activated carbon.

[0015] Furthermore, the ratio of activated carbon micropowder, thioalkyl coupling agent, titanium tetrachloride, dimethylacetamide, and deionized water is 100g: 4.5-5.8g: 2.2-3.5mL: 50-70mL: 120-150mL. The sulfur and nitrogen in the thioalkyl coupling agent molecule form a complex, preferentially capturing the added titanium tetrachloride. With the hydrolysis, a complex of micro-nano structured titanium oxide and thioalkyl coupling agent is formed. At the same time, the acidic products generated with hydrolysis promote the ethoxy hydrolysis of the thioalkyl coupling agent and couple it with the activated carbon micropowder. Using the thioalkyl coupling agent as a bridging material, in-situ hydrolysis captures titanium oxide and combines it with activated carbon.

[0016] Furthermore, the fineness of the activated carbon powder is not less than 150 mesh.

[0017] A4: Mix dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol, purge with nitrogen for protection, stir at 80-120 rpm, reflux for 8-10 h, centrifuge, collect the bottom precipitate, wash and dry to obtain modified activated carbon.

[0018] Furthermore, the ratio of dual-loaded activated carbon, 3-chloropropanol, and anhydrous ethanol is 100g:60-80mL:100-150mL, and 3-chloropropanol is subjected to quaternization treatment with thioalkyl coupling agents grafted onto the surface of dual-loaded activated carbon.

[0019] A method for preparing activated carbon meltblown fabric for protective curtains involves mixing the raw materials using a high-speed mixer, drying them, and then transferring them to a meltblown spinning machine to form meltblown fabric.

[0020] Furthermore, the key process parameters for spinning during meltblown spinning are set as follows: 200℃ for zone 1 of the extruder barrel, 210℃ for zone 2, 220℃ for zone 3, 220℃ for zone 4, and 230℃ for the flange; the receiving distance is 15cm, the hot air temperature is 270℃, and the hot air pressure is 3.5bar.

[0021] The beneficial effects of this invention are:

[0022] This invention discloses a protective curtain activated carbon meltblown fabric with polypropylene as the matrix. By compounding a self-made modified activated carbon, the fabric is endowed with excellent breathability and filtration properties, while also possessing superior antibacterial capabilities. This modified activated carbon uses ultrafine activated carbon as a carrier. A ring-opening reaction is performed between silane coupling agent KH560 and diallylamine, introducing a dienyl structure to the molecular end of silane coupling agent KH560. Then, n-octyl mercaptan is click-added to the introduced dienyl structure, forming a sulfur-nitrogen-containing alkyl modification. In a liquid phase environment, using a thioalkyl coupling agent as a bridging material, titanium oxide is captured by in-situ hydrolysis and combined with activated carbon. Finally, the surface-grafted organic matter is quaternized with 3-chloropropanol. The long-chain alkyl groups introduced onto the surface of the modified activated carbon modify the activated carbon, improving the phase relationship between the activated carbon and the polypropylene matrix. The activated carbon carrier is more easily and evenly dispersed into the meltblown fibers during melt blending, providing support and forming uniform secondary pores. This improves the air permeability of the meltblown fabric. Compared to existing activated carbon composite meltblown fabrics, the uniformly dispersed activated carbon carrier has less mechanical impact on the meltblown fibers. At the same time, the uniform activated carbon pores can fully adsorb odorous gases, showing higher adsorption rates for ammonia and hydrogen sulfide in tests. The thioalkyl coupling agent captures titanium oxide and activated carbon loading in situ, resulting in better bonding performance between titanium oxide and activated carbon. This makes it less prone to falling off during repeated use, extending its service life. Furthermore, thanks to the in-situ capture and composite process, the quaternary ammonium structure and titanium oxide are uniformly loaded, fully exerting a synergistic antibacterial effect and giving the meltblown fabric excellent antibacterial efficacy. It has broad application prospects, especially in medical protective curtains. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Preparation of activated carbon meltblown fabric for protective curtains, as detailed below:

[0025] 1) Preparation of modified activated carbon

[0026] Step A1: Mix diallylamine, epoxy accelerator DMP-30, and dioxane thoroughly, purge with dry nitrogen, maintain the temperature in an oil bath at 75°C, and stir at 120 rpm. Slowly add silane coupling agent KH560 over 30 minutes. After complete addition, continue stirring at a constant temperature. Control the total reaction time to 1.6 hours. The ratio of diallylamine, silane coupling agent KH560, epoxy accelerator DMP-30, and dioxane in the reaction is 0.1 mol: 0.102 mol: 0.2 g: 50 mL. After the reaction is complete, remove dioxane by rotary evaporation under reduced pressure to obtain the dienylated coupling agent.

[0027] Step A2: Mix diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone, and apply UVA light at a rate of 150 W / m. 2 The mixture was subjected to ultraviolet irradiation, stirred at 60 rpm, and refluxed at 58±2℃ for 3 h. The ratio of diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine and anhydrous acetone in the reaction was 0.1 mol: 0.205 mol: 20 mg: 120 mL. After the reaction was completed, the acetone was removed by rotary evaporation to obtain the thioalkyl coupling agent.

[0028] Step A3: Mix the thioalkyl coupling agent, dimethylacetamide, and deionized water, and add activated carbon micro powder. The ultrafine powder, approximately 200 mesh, provided by Ningxia Pingluo County Jinsheng Activated Carbon Co., Ltd., was used throughout the process. The mixture was ultrasonically dispersed at 28 kHz. Titanium tetrachloride was slowly added over 60 minutes. After complete addition, ultrasonic dispersion was maintained, and the total reaction time was controlled to 2 hours. The ratio of activated carbon micro powder, thioalkyl coupling agent, titanium tetrachloride, dimethylacetamide, and deionized water was 100 g: 4.5 g: 2.2 mL: 50 mL: 120 mL. After the reaction, the mixture was neutralized with ammonia water, centrifuged, and the bottom precipitate was dried to obtain double-loaded activated carbon.

[0029] A4: Mix dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol, purge with nitrogen for protection, stir at 80 rpm, and reflux for 10 h. The ratio of dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol is 100 g: 60 mL: 100 mL. After centrifugation, take the bottom precipitate, wash and dry to obtain modified activated carbon.

[0030] 2) Meltblown molding

[0031] Raw materials are calculated as a percentage by weight:

[0032] High melt index polypropylene (93.02 wt%) was used, and PPH-Y1500 raw materials provided by China Petroleum & Chemical Corporation were used throughout the implementation process.

[0033] 4.5 wt% modified activated carbon was prepared according to this embodiment;

[0034] The electret agent was 1.8 wt%, and tourmaline powder with a fineness of 1250 mesh was used throughout the process, which was provided by Shijiazhuang Tourmaline Mineral Products Co., Ltd.

[0035] Antioxidant 0.13wt%, antioxidant 1010 and antioxidant 168 were mixed in a mass ratio of 1:1 during the implementation process;

[0036] The lubricant was 0.2 wt%, and PP-202 polypropylene wax provided by Shanghai Huayi Chemical Additives Co., Ltd. was used throughout the process.

[0037] The above raw materials were added to a high-speed mixer according to the proportions and mixed at 1000 rpm for 10 minutes. The mixture was then placed in an electric heating drying oven and dried at 80°C for 3 hours. The mixture was then transferred to a meltblown spinning machine for meltblown molding. The key process parameters for the meltblown spinning process were set as follows: 200°C for zone 1, 210°C for zone 2, 220°C for zone 3, 220°C for zone 4, and 230°C for the flange; the receiving distance was 15 cm, the hot air temperature was 270°C, and the hot air pressure was 3.5 bar.

[0038] Example 2: Preparation of activated carbon meltblown fabric for protective curtains, as detailed below:

[0039] 1) Preparation of modified activated carbon

[0040] Step A1: Mix diallylamine, epoxy accelerator DMP-30, and dioxane thoroughly, purge with dry nitrogen, maintain the temperature in an oil bath at 80°C, and stir at 120 rpm. Slowly add silane coupling agent KH560 over 25 minutes. After complete addition, continue stirring at a constant temperature. Control the total reaction time to 1.4 hours. The ratio of diallylamine, silane coupling agent KH560, epoxy accelerator DMP-30, and dioxane in the reaction is 0.1 mol: 0.105 mol: 0.18 g: 65 mL. After the reaction is complete, remove dioxane by rotary evaporation under reduced pressure to obtain the dienylated coupling agent.

[0041] Step A2: Mix diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone, and apply UVA light at 200 W / m. 2 The mixture was subjected to ultraviolet irradiation, stirred at 90 rpm, and refluxed at 58±2℃ for 2.6 h. The ratio of diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone in the reaction was 0.1 mol: 0.207 mol: 17 mg: 140 mL. After the reaction was completed, the acetone was removed by rotary evaporation to obtain the thioalkyl coupling agent.

[0042] Step A3: Mix the thioalkyl coupling agent, dimethylacetamide, and deionized water, add activated carbon powder, and sonicate at 33 kHz. Maintain the ultrasonic dispersion state and slowly add titanium tetrachloride over 50 min. After complete addition, continue ultrasonic dispersion reaction, controlling the total reaction time to 1.8 h. During the reaction, the ratio of activated carbon powder, thioalkyl coupling agent, titanium tetrachloride, dimethylacetamide, and deionized water is 100 g: 5.2 g: 2.7 mL: 60 mL: 130 mL. After the reaction is completed, neutralize with ammonia water, centrifuge, and dry the bottom precipitate to obtain double-loaded activated carbon.

[0043] A4: Mix dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol, purge with nitrogen for protection, stir at 120 rpm, and reflux for 9 h. The ratio of dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol is 100 g: 70 mL: 130 mL. After centrifugation, collect the bottom precipitate, wash and dry to obtain modified activated carbon.

[0044] 2) Meltblown molding

[0045] Raw materials are calculated as a percentage by weight:

[0046] The composition includes 91.85 wt% high melt flow index polypropylene, 6.2 wt% modified activated carbon, 1.4 wt% electret agent, 0.1 wt% antioxidant, 0.15 wt% nucleating agent, and 0.3 wt% lubricant.

[0047] The above raw materials were added to a high-speed mixer according to the proportions and mixed at 1000 rpm for 10 minutes. The mixture was then placed in an electric heating drying oven and dried at 80°C for 3 hours. The mixture was then transferred to a meltblown spinning machine for meltblown molding. The key process parameters for the meltblown spinning process were set as follows: extruder barrel zone 1 210°C, zone 2 220°C, zone 3 220°C, zone 4 230°C, flange 240°C; receiving distance 15cm, hot air temperature 270°C, and hot air pressure 4.0 bar.

[0048] Example 3: Preparation of activated carbon meltblown fabric for protective curtains, as detailed below:

[0049] 1) Preparation of modified activated carbon

[0050] Step A1: Mix diallylamine, epoxy accelerator DMP-30, and dioxane thoroughly, purge with dry nitrogen, maintain the temperature in an oil bath at 85°C, and stir at 180 rpm. Slowly add silane coupling agent KH560 over 20 minutes. After complete addition, continue stirring at a constant temperature. Control the total reaction time to 1.2 hours. The ratio of diallylamine, silane coupling agent KH560, epoxy accelerator DMP-30, and dioxane in the reaction is 0.1 mol: 0.105 mol: 0.15 g: 70 mL. After the reaction is complete, remove dioxane by rotary evaporation under reduced pressure to obtain the dienylated coupling agent.

[0051] Step A2: Mix diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone, and apply UVA light at 200 W / m. 2 The mixture was subjected to ultraviolet irradiation, stirred at 90 rpm, and refluxed at 58±2℃ for 2.5 h. The ratio of dienoyl coupling agent, n-octyl mercaptan, dimethylphenylphosphine and anhydrous acetone in the reaction was 0.1 mol: 0.21 mol: 15 mg: 150 mL. After the reaction was completed, the acetone was removed by rotary evaporation to obtain the thioalkyl coupling agent.

[0052] Step A3: Mix the thioalkyl coupling agent, dimethylacetamide, and deionized water, add activated carbon powder, and sonicate at 33 kHz. Maintain the ultrasonic dispersion state and slowly add titanium tetrachloride over 40 minutes. After complete addition, continue ultrasonic dispersion reaction, controlling the total reaction time to 1.5 hours. During the reaction, the ratio of activated carbon powder, thioalkyl coupling agent, titanium tetrachloride, dimethylacetamide, and deionized water is 100 g: 5.8 g: 3.5 mL: 70 mL: 150 mL. After the reaction is completed, neutralize with ammonia water, centrifuge, and dry the bottom precipitate to obtain double-loaded activated carbon.

[0053] A4: Mix dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol, purge with nitrogen for protection, stir at 120 rpm, and reflux for 8 hours. The ratio of dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol is 100 g: 80 mL: 150 mL. After centrifugation, collect the bottom precipitate, wash and dry to obtain modified activated carbon.

[0054] 2) Meltblown molding

[0055] Raw materials are calculated as a percentage by weight:

[0056] The composition includes 90.85 wt% high melt flow index polypropylene, 7.5 wt% modified activated carbon, 1.2 wt% electret agent, 0.15 wt% antioxidant, 0.1 wt% nucleating agent, and 0.2 wt% lubricant.

[0057] The above raw materials were added to a high-speed mixer according to the proportions and mixed at 1000 rpm for 10 minutes. The mixture was then placed in an electric heating drying oven and dried at 80°C for 3 hours. The mixture was then transferred to a meltblown spinning machine for meltblown molding. The key process parameters for the meltblown spinning process were set as follows: extruder barrel zone 1 210°C, zone 2 225°C, zone 3 230°C, zone 4 230°C, flange 240°C; receiving distance 15cm, hot air temperature 280°C, and hot air pressure 4.5 bar.

[0058] In comparison, referring to publicly available technology, meltblown fabric was prepared using activated carbon doped with titanium dioxide, as detailed below:

[0059] Take activated carbon micro powder, add twice the mass of concentrated hydrochloric acid and soak for 24 hours. Repeat centrifugation and washing 3 times to remove hydrochloric acid. Then dry at 120℃ for 2 hours. Mix it with nano titanium dioxide at a mass ratio of 3:1 to make activated carbon doped with titanium dioxide. Referring to Example 3, replace the modified activated carbon with activated carbon doped with titanium dioxide of the same weight percentage, and the rest is exactly the same.

[0060] Examples 1-3 and the comparative example were used to test the air permeability and filtration efficiency of meltblown fabric using a mask particulate filtration efficiency tester. The specific test results are shown in Table 1.

[0061] Table 1

[0062]

[0063] Note: K 0.3 K 1.0 and K 3.0 The figures represent the filtration efficiencies of meltblown fabric for particles with diameters of 0.3 μm, 1.0 μm, and 3.0 μm, respectively.

[0064] As shown in Table 1, the meltblown fabric prepared in the examples has excellent filtration efficiency, with a filtration efficiency of over 99.99% for 3.0 μm particles and a filtration efficiency for 0.3 μm particles that is much higher than that in the comparative example, exhibiting better fine filtration. In the air permeability test, the air permeability increased significantly with the increase of the proportion of modified activated carbon, which may be related to the supporting role of modified activated carbon between meltblown fibers, forming air-permeable pores. In the comparative example, the air permeability was lower than that of Example 3, and the resistance was higher than that of Example 3, which may be related to the dispersibility of titanium dioxide doped with activated carbon.

[0065] Examples 1-3 and the comparative example were used. Referring to GB / T 33610.2-2017, 100 μL / L ammonia and 30 μL / L hydrogen sulfide were used as odor sources to test the deodorization properties of the meltblown fabric. Specific test data are shown in Table 2.

[0066] Table 2

[0067]

[0068] As shown in Table 2, the meltblown fabric prepared in the example has a strong adsorption capacity for common unpleasant gases, which is much higher than that of the comparative example, and exhibits excellent air purification effect.

[0069] Examples 1-3 and the comparative example were used. Tensile tests were conducted at 50 mm / min using a universal testing machine, referring to GB / T 24218.3-2010 standard. The maximum strain and maximum tensile stress were recorded. The antibacterial properties of the meltblown fabric were tested using the antibacterial ring method. Simultaneously, the samples were repeatedly immersed in the solution 20 times before the antibacterial properties were tested again. Specific test data are shown in Table 3.

[0070] Table 3

[0071]

[0072] As can be seen from the test results in Table 3, the meltblown fabric prepared in the example has good mechanical properties and exhibits excellent antibacterial ability in the antibacterial test.

[0073] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An activated carbon meltblown fabric for protective curtains, characterized in that, The composition by weight percentage includes: 4.5-7.5 wt% modified activated carbon, 1.2-1.8 wt% electret agent, 0.1-0.15 wt% antioxidant, 0.1-0.2 wt% nucleating agent, and 0.2-0.35 wt% lubricant, with the balance being high melt index polypropylene; Modified activated carbon is made by the following method: Step A1: Mix diallylamine, epoxy accelerator DMP-30 and dioxane, purge with dry nitrogen for protection, control the temperature in an oil bath at 75-85℃, stir and slowly add silane coupling agent KH560, control the total addition reaction time to 1.2-1.6h, remove dioxane by rotary evaporation under reduced pressure after the reaction is completed, and obtain dienylated coupling agent; Step A2: Mix the diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine, and anhydrous acetone, and apply at 150-200 W / m 2 The mixture was subjected to ultraviolet irradiation, stirred and heated to reflux for 2.5-3 hours. After the reaction was completed, acetone was removed by rotary evaporation to obtain the thioalkyl coupling agent. Step A3: Mix the thioalkyl coupling agent, dimethylacetamide and deionized water, add activated carbon powder, and slowly add titanium tetrachloride while maintaining ultrasonic dispersion. Control the total reaction time to 1.5-2 hours. After the reaction is completed, neutralize with ammonia water, centrifuge and dry the bottom precipitate to obtain double-loaded activated carbon. Step A4: Mix the dual-loaded activated carbon, 3-chloropropanol and anhydrous ethanol, purge with nitrogen for protection, stir and reflux for 8-10 hours, centrifuge, collect the bottom precipitate, wash and dry to obtain modified activated carbon.

2. The activated carbon meltblown fabric for protective curtains according to claim 1, characterized in that, The ratio of diallylamine, silane coupling agent KH560, epoxy accelerator DMP-30, and dioxane is 0.1 mol: 0.102-0.105 mol: 0.15-0.2 g: 50-70 mL.

3. The activated carbon meltblown fabric for protective curtains according to claim 2, characterized in that, The ratio of diene coupling agent, n-octyl mercaptan, dimethylphenylphosphine and anhydrous acetone is 0.1 mol: 0.205-0.21 mol: 15-20 mg: 120-150 mL.

4. The activated carbon meltblown fabric for protective curtains according to claim 3, characterized in that, The ratio of activated carbon powder, thioalkyl coupling agent, titanium tetrachloride, dimethylacetamide and deionized water is 100g: 4.5-5.8g: 2.2-3.5mL: 50-70mL: 120-150mL.

5. The activated carbon meltblown fabric for protective curtains according to claim 4, characterized in that, The fineness of activated carbon powder is not less than 150 mesh.

6. The activated carbon meltblown fabric for protective curtains according to claim 4, characterized in that, The ratio of dual-loaded activated carbon, 3-chloropropanol, and anhydrous ethanol is 100g: 60-80mL: 100-150mL.

7. The method for preparing activated carbon meltblown fabric for protective curtains according to claim 1, characterized in that, The raw materials are mixed evenly by a high-speed mixer, dried, and then transferred to a meltblown spinning machine to be meltblown into meltblown fabric.

8. The method for preparing activated carbon meltblown fabric for protective curtains according to claim 7, characterized in that, The key process parameters for spinning during meltblown spinning are set as follows: 200℃ for zone 1 of the extruder barrel, 210℃ for zone 2, 220℃ for zone 3, 220℃ for zone 4, and 230℃ for the flange; the receiving distance is 15cm, the hot air temperature is 270℃, and the hot air pressure is 3.5bar.

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