Preparation method of antibacterial, flame-retardant and ionic conductive cotton fabric

Abstract

The invention relates to the technical field of fabric processing, in particular to a preparation method of an antibacterial, flame-retardant and ion-conductive cotton fabric, which comprises the following specific steps: adjusting the pH value of 10-30 wt% of methacrylic acid aqueous solution to 7; stirring and mixing the cotton fabric and a methacrylic acid aqueous solution, and adding an initiator to complete an esterification reaction; washing with deionized water to remove the residual solution, and drying to obtain the cotton fabric grafted with methacrylic acid; weighing an imidazole hexafluorophosphate ionic liquid raw material, and dissolving the imidazole hexafluorophosphate ionic liquid raw material in the precursor solution to prepare ionic liquid with the mass fraction of 10-50%; adding a cross-linking agent and a photoinitiator, and carrying out covalent reaction to obtain a modified fabric; the preparation method of the antibacterial, flame-retardant and ion-conductive cotton fabric has excellent flame-retardant, antibacterial, ion-conductive and washable effects, is simple in process, and has wide application prospects and important practical application values.

Description

Technical Field

[0001] The invention relates to the technical field of fabric processing, and in particular to a method for preparing antibacterial, flame-retardant and ion-conductive cotton fabric. Background Art

[0002] Cotton fabric is an important product in daily life. It shows great advantages in water transmission, thermal management, health monitoring, etc.; however, cotton fabric has hydrophilic properties and easily provides a growth environment for bacteria, and cotton fabric has a low limiting oxygen index and is a flammable material.

[0003] At present, the hydroxyl groups on the surface of cotton fabrics are usually used for functionalization treatment, thereby giving the cotton fabrics more functionality; the existing patent publication number CN115247379B discloses a nano-silver antibacterial finishing method for phytic acid-based durable flame-retardant cotton fabrics, which imparts flame retardancy by adding phytic acid, and nano-silver provides antibacterial properties; however, the biggest technical difficulty is that when adding a variety of different functional finishing agents for modification, interference and conflict are likely to occur between the finishing agents, thereby greatly reducing the efficiency of the functional finishing agents, resulting in a waste of raw materials, poor washability of cotton fabrics and other problems; and the use of a variety of finishing agents has a great influence on the inherent properties of cotton fabrics such as softness and tensile strength, which loses the essence of cotton fabrics as fabric clothing.

[0004] Patent publication number CN118087073A discloses a phosphorus-nitrogen hyperbranched polymer for textiles, which imparts flame retardant, antibacterial and antiviral functions to textiles; however, there are also many problems in the above-mentioned prior art. The multifunctional finishing agent currently used has a long synthesis cost and time, a complex finishing process, a long time consumption, harsh reaction conditions, a low grafting amount, and severe loss, and is not suitable for small fabrics or fabrics of specific shapes and industrial applications; finishing agents such as macromolecules and polymers are used in fabric modification, which can easily cause pore blockage and adhere to the skin, affecting wearing comfort; therefore, in order to meet the needs of different application scenarios, it is of great significance to consider using a single reagent to impart antibacterial, flame retardant and conductive multifunctional composite properties to cotton fabrics; in view of this, we propose a method for preparing antibacterial, flame retardant and ion conductive cotton fabrics. Summary of the invention

[0005] The object of the present invention is to solve the deficiencies mentioned in the above background technology and provide a method for preparing antibacterial, flame retardant and ion conductive cotton fabric.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for preparing antibacterial, flame-retardant and ion-conductive cotton fabric, the specific steps of the preparation method are:

[0008] Step 1: Wash the cotton fabric and prepare a 10-30wt% methacrylic acid aqueous solution for standby use;

[0009] Step 2: Adjust the pH value of the methacrylic acid aqueous solution to 7;

[0010] Step 3: Stir and mix the cotton fabric with the methacrylic acid aqueous solution treated in step 2, add an initiator, heat in a water bath at 60-80° C. for 20-40 minutes, then control the wet weight to 100%±2%, and treat in a vacuum oven at 155-165° C. for 20-30 minutes to complete the esterification reaction;

[0011] Step 4: washing at least 3 times with deionized water of not less than 500 ml to remove residual solution, treating in a vacuum oven at 70-90° C. for 30-60 min, and drying to obtain a cotton fabric with methacrylic acid;

[0012] Step 5: Weigh the imidazole hexafluorophosphate ionic liquid raw material, dissolve it in the precursor solution, and prepare an ionic liquid with a mass fraction of 10-50%;

[0013] Step 6: Add a crosslinking agent and a photoinitiator to the ionic liquid prepared in step 5, and preheat in a vacuum oven at 60-80°C until completely dissolved;

[0014] Step 7: mixing the cotton fabric with methacrylic acid in step 4 with the solution in step 6 at a solid-liquid ratio of 1:2, applying 75W-150W ultraviolet light, and covalently reacting for 30-60 minutes to obtain a modified fabric;

[0015] Step 8: washing the modified fabric with ethyl acetate, treating it in a vacuum oven at 70-90° C. for 30-60 min, and drying it to obtain a modified antibacterial, flame-retardant, ion-conductive cotton fabric.

[0016] Preferably, urea is used in step 2 to adjust the pH value to 7.

[0017] Preferably, the initiator is dicyandiamide.

[0018] Preferably, the imidazole hexafluorophosphate ionic liquid raw material is any one of 1-vinyl-3-methylimidazole hexafluorophosphate, 1-allyl-3-methylimidazole hexafluorophosphate, 1-vinyl-3-ethylimidazole hexafluorophosphate, 1-vinyl-3-butylimidazole hexafluorophosphate, 1-vinyl-3-hexylimidazole hexafluorophosphate, 1-vinyl-3-octylimidazole hexafluorophosphate and 1-vinyl-3-dodecylimidazole hexafluorophosphate.

[0019] Preferably, the precursor solution is 1-butyl-3-methylimidazolium hexafluorophosphate.

[0020] Preferably, the cross-linking agent is methylene bisacrylamide

[0021] Preferably, the photoinitiator is 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone

[0022] Preferably, the mass fraction ratio between the imidazole hexafluorophosphate ionic liquid raw material and the cross-linking agent or the photoinitiator is 100:1.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The preparation method of the antibacterial, flame-retardant and ion-conductive cotton fabric can graft the ionic liquid onto the cotton fabric, and use methacrylic acid as an anchor point to firmly fix the cotton fabric and the ionic liquid together, thereby providing high durability;

[0025] 2. The ionic liquid contains imidazolium ring cations, which can be used as cationic antibacterial agents to achieve effective antibacterial effects and washability; and the hexafluorophosphate anions contained can act as hydrophobic anions to reduce bacterial attachment, and the anions and cations play a synergistic antibacterial role;

[0026] 3. The nitrogen-containing imidazole ring flame retardant group in the ionic liquid can have a synergistic effect with the phosphorus and fluorine flame retardant groups to improve the flame retardant efficiency and achieve self-extinguishing under flame;

[0027] 4. The product of the present invention has excellent flame retardant, antibacterial, ion conductive and washable effects, and the process of the invention is simple, with broad application prospects and important practical application value. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] The present invention describes the above technical solution in detail through the following embodiments:

[0030] Example 1

[0031] A method for preparing antibacterial, flame-retardant and ion-conductive cotton fabric, the preparation method specifically comprising:

[0032] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH to 7;

[0033] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and the mixture was heated in a water bath at 70° C. for 30 minutes. After the wet weight was controlled to be 100%±2%, the mixture was treated in a vacuum oven at 160° C. for 20 minutes to complete the esterification reaction;

[0034] Then, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 min;

[0035] Next, 25 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid with a mass fraction of 50%;

[0036] Weigh 0.25 g of crosslinker methylenebisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, place in the ionic liquid mixed solution, and preheat in an oven at 80° C. for 30 min until completely dissolved;

[0037] The cotton fabric connected with methacrylic acid was mixed with ionic liquid, the solid-liquid ratio of cotton fabric to ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes respectively; the modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80℃ for 30 minutes to obtain a modified antibacterial, flame retardant and ion conductive cotton fabric.

[0038] Example 2

[0039] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 20g, 0.24mol of methacrylic acid, add it to 80ml of water, and add 14.4g of urea to adjust the pH of the solution to 7;

[0040] After the cotton fabric is washed, the obtained solution is mixed with the cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide is added, and the mixture is heated in a water bath at 70° C. for 30 minutes. After the wet weight is controlled to be 100%±2%, the mixture is treated in a vacuum oven at 160° C. for 20 minutes to complete the esterification reaction;

[0041] Then, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 min;

[0042] Dissolve 25 g of 1-vinyl-3-methylimidazolium hexafluorophosphate in 25 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid with a mass fraction of 50%;

[0043] 0.25 g of a crosslinking agent, methylenebisacrylamide, and 0.25 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0044] The cotton fabric connected with methacrylic acid was mixed with an ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the fabric was placed under a 75W ultraviolet lamp and irradiated on both sides for 30 minutes; the modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0045] Example 3

[0046] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 30g, 0.36mol of methacrylic acid, add it to 70ml of water, and add 21.6g of urea to adjust the pH of the solution to 7;

[0047] The obtained solution was mixed with cotton fabric and stirred for 20 min, 5 g of dicyandiamide was added, and heated in a water bath at 70°C for 30 min. After the wet weight was controlled to 100% ± 2%, it was placed in a vacuum oven at 160°C for 20 min;

[0048] Then, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 min;

[0049] 25 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methylimidazolium hexafluorophosphate, and the mixture was adjusted to prepare a 50% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.25 g of a cross-linking agent, methylenebisacrylamide, and 0.25 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution, and the mixture was preheated in an oven at 80° C. for 30 min until it was completely dissolved;

[0050] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0051] Example 4

[0052] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0053] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and heated in a water bath at 70°C for 30 minutes. The wet weight was controlled to be 100% ± 2% and then placed in a vacuum oven at 160°C for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 minutes.

[0054] 20 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 30 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 40% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid; 0.20 g of cross-linking agent methylenebisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0055] The cotton fabric connected with methacrylic acid was mixed with an ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the fabric was placed under a 75W ultraviolet lamp and irradiated on both sides for 30 minutes; the modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0056] Example 5

[0057] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0058] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and the mixture was heated in a water bath at 70° C. for 30 minutes. The wet weight was controlled to be 100%±2%, and then placed in a vacuum oven at 160° C. for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80° C. for 30 minutes.

[0059] 15 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylenebisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0060] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0061] Example 6

[0062] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0063] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and the mixture was heated in a water bath at 70° C. for 30 minutes. The wet weight was controlled to be 100%±2%, and then placed in a vacuum oven at 160° C. for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80° C. for 30 minutes.

[0064] 10 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.1 g of a cross-linking agent, methylenebisacrylamide, and 0.1 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0065] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0066] Example 7

[0067] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0068] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and the mixture was heated in a water bath at 70° C. for 30 minutes. The wet weight was controlled to be 100%±2%, and then placed in a vacuum oven at 160° C. for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80° C. for 30 minutes.

[0069] 5 g of 1-vinyl-3-methylimidazolium hexafluorophosphate was dissolved in 45 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 10% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.05 g of a cross-linking agent, methylenebisacrylamide, and 0.05 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0070] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0071] Example 8

[0072] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0073] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and heated in a water bath at 70°C for 30 minutes. The wet weight was controlled to be 100% ± 2% and then placed in a vacuum oven at 160°C for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 minutes.

[0074] Dissolve 25 g of 1-allyl-3-methylimidazolium hexafluorophosphate in 25 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid with a mass fraction of 50%;

[0075] 0.25 g of a crosslinking agent, methylenebisacrylamide, and 0.25 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0076] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0077] Example 9

[0078] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0079] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and heated in a water bath at 70°C for 30 minutes. The wet weight was controlled to be 100% ± 2% and then placed in a vacuum oven at 160°C for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 minutes.

[0080] Dissolve 20 g of 1-allyl-3-methylimidazolium hexafluorophosphate in 30 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid with a mass fraction of 40%;

[0081] 0.2 g of crosslinker methylenebisacrylamide and 0.2 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution and preheated in an oven at 80°C for 30 min until completely dissolved;

[0082] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0083] Example 10

[0084] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and use, accurately weigh 10g, 0.12mol of methacrylic acid, add it to 90ml of water, and add 7.2g of urea to adjust the pH of the solution to 7;

[0085] The obtained solution was mixed with cotton fabric and stirred for 20 minutes, 5 g of dicyandiamide was added, and heated in a water bath at 70°C for 30 minutes. The wet weight was controlled to be 100% ± 2% and then placed in a vacuum oven at 160°C for 20 minutes. Subsequently, 500 ml of deionized water was used three times to remove the residual methacrylic acid and other solutions, and the cotton fabric with methacrylic acid was obtained after drying in an oven at 80°C for 30 minutes.

[0086] Dissolve 15 g of 1-allyl-3-methylimidazolium hexafluorophosphate in 35 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid with a mass fraction of 30%;

[0087] 0.15 g of a crosslinking agent, methylenebisacrylamide, and 0.15 g of a photoinitiator, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, were added to the ionic liquid mixed solution and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0088] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0089] Embodiment 11

[0090] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0091] 10 g of 1-allyl-3-methylimidazolium hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.10 g of cross-linking agent methylenebisacrylamide and 0.10 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0092] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0093] Example 12

[0094] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0095] 5 g of 1-allyl-3-methylimidazolium hexafluorophosphate was dissolved in 45 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 10% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylenebisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0096] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0097] Embodiment 13

[0098] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0099] 25 g of 1-vinyl-3-ethylimidazolium hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 50% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.25 g of cross-linking agent methylenebisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0100] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0101] Embodiment 14

[0102] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0103] 20 g of 1-vinyl-3-ethylimidazolium hexafluorophosphate was dissolved in 30 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 40% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.20 g of cross-linking agent methylenebisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0104] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0105] Embodiment 15

[0106] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0107] 15 g of 1-vinyl-3-ethylimidazolium hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylenebisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0108] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0109] Example 16

[0110] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0111] 10 g of 1-vinyl-3-ethylimidazolium hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.10 g of cross-linking agent methylenebisacrylamide and 0.10 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0112] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0113] Embodiment 17

[0114] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0115] 5 g of 1-vinyl-3-ethylimidazole hexafluorophosphate was dissolved in 45 g of 1-butyl-3-methylimidazole hexafluorophosphate to prepare a 10% mass fraction of 1-vinyl-3-methylimidazole hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylenebisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0116] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0117] Embodiment 18

[0118] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0119] 25 g of 1-vinyl-3-butyl imidazole hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 50% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.25 g of cross-linking agent methylene bisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0120] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0121] Embodiment 19

[0122] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0123] 20 g of 1-vinyl-3-butyl imidazole hexafluorophosphate was dissolved in 30 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 40% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.20 g of cross-linking agent methylene bisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0124] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0125] Embodiment 20

[0126] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0127] 15 g of 1-vinyl-3-butyl imidazole hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylene bisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0128] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0129] Embodiment 21

[0130] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0131] 10 g of 1-vinyl-3-butyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.10 g of cross-linking agent methylene bisacrylamide and 0.10 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0132] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0133] Embodiment 22

[0134] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0135] 5 g of 1-vinyl-3-butyl imidazole hexafluorophosphate was dissolved in 45 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 10% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylene bisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0136] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0137] Embodiment 23

[0138] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0139] 25 g of 1-vinyl-3-hexyl imidazole hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 50% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.25 g of cross-linking agent methylene bisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0140] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0141] Embodiment 24

[0142] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0143] 20 g of 1-vinyl-3-hexyl imidazole hexafluorophosphate was dissolved in 30 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 40% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.20 g of cross-linking agent methylene bisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0144] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0145] Embodiment 25

[0146] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0147] 15 g of 1-vinyl-3-hexyl imidazole hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylene bisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0148] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0149] Embodiment 26

[0150] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0151] 10 g of 1-vinyl-3-hexyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.10 g of cross-linking agent methylene bisacrylamide and 0.10 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0152] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0153] Embodiment 27

[0154] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0155] 5 g of 1-vinyl-3-hexyl imidazole hexafluorophosphate was dissolved in 45 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 10% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylene bisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0156] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0157] Embodiment 28

[0158] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0159] 25 g of 1-vinyl-3-octylimidazole hexafluorophosphate was dissolved in 25 g of 1-butyl-3-methylimidazole hexafluorophosphate to prepare a 50% mass fraction of 1-vinyl-3-methylimidazole hexafluorophosphate ionic liquid, 0.25 g of cross-linking agent methylenebisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0160] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0161] Embodiment 29

[0162] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0163] 20 g of 1-vinyl-3-octylimidazole hexafluorophosphate was dissolved in 30 g of 1-butyl-3-methylimidazole hexafluorophosphate to prepare a 40% mass fraction of 1-vinyl-3-methylimidazole hexafluorophosphate ionic liquid, 0.20 g of cross-linking agent methylenebisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0164] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0165] Embodiment 30

[0166] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0167] 15 g of 1-vinyl-3-octylimidazole hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methylimidazole hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methylimidazole hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylenebisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0168] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0169] Embodiment 31

[0170] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0171] Dissolve 10g of 1-vinyl-3-octylimidazole hexafluorophosphate in 40g of 1-butyl-3-methylimidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methylimidazole hexafluorophosphate ionic liquid, add 0.1g of cross-linking agent methylenebisacrylamide, 0.1g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone into the ionic liquid mixed solution, and preheat in an oven at 80°C for 30min until completely dissolved. Mix the cotton fabric with methacrylic acid and the ionic liquid solution, control the solid-liquid ratio of cotton fabric to ionic liquid to be 1:2, and place it under a 75w ultraviolet lamp and irradiate the front and back sides for 30min each;

[0172] The obtained modified fabric was washed three times with 200 ml of ethyl acetate and dried in an oven at 80° C. for 30 min to obtain a modified antibacterial, flame-retardant, ion-conductive cotton fabric.

[0173] Embodiment 32

[0174] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0175] 15 g of 1-vinyl-3-octylimidazole hexafluorophosphate was dissolved in 35 g of 1-butyl-3-methylimidazolium hexafluorophosphate to prepare a 30% mass fraction of 1-vinyl-3-methylimidazolium hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylenebisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80° C. for 30 min until completely dissolved;

[0176] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0177] Embodiment 33

[0178] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0179] 10 g of 1-vinyl-3-dodecyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.25 g of cross-linking agent methylene bisacrylamide and 0.25 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0180] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0181] Embodiment 34

[0182] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0183] 10 g of 1-vinyl-3-dodecyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.20 g of cross-linking agent methylene bisacrylamide and 0.20 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0184] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0185] Embodiment 35

[0186] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0187] 10 g of 1-vinyl-3-dodecyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.15 g of cross-linking agent methylene bisacrylamide and 0.15 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0188] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0189] Embodiment 36

[0190] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0191] 10 g of 1-vinyl-3-dodecyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.1 g of cross-linking agent methylene bisacrylamide and 0.1 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0192] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80°C for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0193] Embodiment 37

[0194] Select 5 pieces of 5cm×5cm, 2.4g cotton fabrics for washing and standby, accurately weigh 10g and 0.12mol of methacrylic acid, add them to 90ml water, add 7.2g urea to adjust the pH of the solution to 7, mix the obtained solution with the cotton fabric and stir for 20min, add 5g of dicyandiamide, heat in a water bath at 70℃ for 30min, control the wet weight to 100%±2%, and then place in a vacuum oven at 160℃ for 20min. Then use 500ml of deionized water three times to remove the residual methacrylic acid and other solutions, and dry in an oven at 80℃ for 30min to obtain the cotton fabric with methacrylic acid;

[0195] 10 g of 1-vinyl-3-dodecyl imidazole hexafluorophosphate was dissolved in 40 g of 1-butyl-3-methyl imidazole hexafluorophosphate to prepare a 20% mass fraction of 1-vinyl-3-methyl imidazole hexafluorophosphate ionic liquid, 0.05 g of cross-linking agent methylene bisacrylamide and 0.05 g of photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone were added to the ionic liquid mixed solution, and preheated in an oven at 80°C for 30 min until completely dissolved;

[0196] The cotton fabric with methacrylic acid was mixed with the ionic liquid solution, the solid-liquid ratio of the cotton fabric to the ionic liquid was controlled to be 1:2, and the front and back sides were irradiated under a 75W ultraviolet lamp for 30 minutes each. The modified fabric was washed with 200ml ethyl acetate three times, and dried in an oven at 80℃ for 30 minutes to obtain a modified antibacterial, flame-retardant, and ion-conductive cotton fabric.

[0197] The modified antibacterial, flame-retardant, and ion-conductive cotton fabric samples prepared according to Examples 1 to 37 were tested for the antibacterial rate of each sample against Escherichia coli and Staphylococcus aureus, the maximum number of standard washings after which the antibacterial rate was reduced to 90%, and the limiting oxygen index, ion conductivity, tensile strength, and water vapor permeability.

[0198] The specific data is as follows:

[0199]

[0200]

[0201]

[0202] It is important to explain that: first, the ionic liquid in the present application is a room temperature molten salt composed of imidazole ring cations and hexafluorophosphate anions. The main chain of the ionic liquid is composed of vinyl or allyl groups, and the side chain is composed of 2-12 carbon atoms. It has strong designability, a wide temperature operating range and a wide electrochemical window. Ionic liquids provide three major characteristics for the multifunctional modification of cotton fabrics. Among them, the combination of cations and side chains can achieve antibacterial properties. Secondly, ionic liquids containing nitrogen, phosphorus and fluorine elements can achieve synergistic flame retardant effects. Finally, its intrinsic ionic conductivity meets the sensing requirements. Therefore, ionic liquids achieve multifunctional modification of cotton fabrics.

[0203] The ionic liquid in the present invention can play the role of a cationic antibacterial agent, giving cotton fabrics good antibacterial effects on Escherichia coli and Staphylococcus aureus, while the phosphorus element carried in the anions in the ionic liquid gives the cotton fabrics good flame retardant effects, and the intrinsic ionic conductivity of the ionic liquid gives the cotton fabrics good electrical conductivity; in addition, by increasing the side chain length on the imidazole ring, the cotton fabrics are given better antibacterial and flame retardant properties and anti-cleaning ability.

[0204] In addition, it should be noted that the methacrylic acid aqueous solution in the present invention is used as a precursor solution, which serves as an anchor point. Since methacrylic acid contains two functional groups, a carboxyl group and a carbon-carbon double bond, methacrylic acid can react with the hydroxyl group of the cotton fabric through the carboxyl group to undergo an esterification reaction, exposing the active carbon-carbon double bond on the surface of the cotton fabric.

[0205] At the same time, the second aspect of the present invention is to use imidazole hexafluorophosphate ionic liquids with double bonds in side chains of different lengths to covalently connect with the activated carbon-carbon double bonds exposed on the surface of cotton fabric, thereby forming an ion gel film on the fiber surface of cotton fabric.

[0206] Specifically, the principle of the present invention is that cotton fabric and methacrylic acid can undergo an esterification reaction under high temperature and the catalysis of dicyandiamide, and the ionic liquid containing vinyl / allyl groups can undergo a covalent reaction with the cotton fabric esterified with methacrylic acid under an ultraviolet light environment, and then cross-link to obtain an antibacterial, flame-retardant and conductive cotton fabric;

[0207] When bacteria come into contact with the surface of modified cotton fabric, the imidazole cationic groups will interact electrostatically with negatively charged proteins, leading to bacterial cell membrane destruction and cell fluid leakage. In addition, by designing the length of the ionic liquid side chain, the antibacterial effect increases with the increase of the side chain.

[0208] The nitrogen, fluorine and phosphorus elements carried by the ionic liquid achieve dual flame retardant effects in the solid phase and the gas phase during the combustion process; the intrinsic conductivity of the ionic liquid gives the cotton fabric good conductivity.

[0209] In summary, and based on the data in the above table, it can be seen that the present application can obtain a composite functional cotton fabric with antibacterial, flame retardant, ion conductive, and long-lasting washability, and its preparation process is simple, and it has broad application prospects and important practical application value.

[0210] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A method for preparing antibacterial, flame retardant and ion conductive cotton fabric, characterized in that: The specific steps of the preparation method are: Step 1: Wash the cotton fabric and prepare a 10-30wt% methacrylic acid aqueous solution for standby use; Step 2: Adjust the pH value of the methacrylic acid aqueous solution to 7; Step 3: Stir and mix the cotton fabric with the methacrylic acid aqueous solution treated in step 2, add an initiator, heat in a water bath at 60-80° C. for 20-40 minutes, then control the wet weight to 100%±2%, and treat in a vacuum oven at 155-165° C. for 20-30 minutes to complete the esterification reaction; Step 4: washing at least 3 times with deionized water of not less than 500 ml to remove residual solution, treating in a vacuum oven at 70-90° C. for 30-60 min, and drying to obtain a cotton fabric with methacrylic acid; Step 5: Weigh the imidazole hexafluorophosphate ionic liquid raw material, dissolve it in the precursor solution, and prepare an ionic liquid with a mass fraction of 10-50%; Step 6: Add a crosslinking agent and a photoinitiator to the ionic liquid prepared in step 5, and preheat in a vacuum oven at 60-80°C until completely dissolved; Step 7: mixing the cotton fabric with methacrylic acid in step 4 with the solution in step 6 at a solid-liquid ratio of 1:2, applying 75W-150W ultraviolet light, and covalently reacting for 30-60 minutes to obtain a modified fabric; Step 8: washing the modified fabric with ethyl acetate, treating it in a vacuum oven at 70-90° C. for 30-60 min, and drying it to obtain a modified antibacterial, flame-retardant, ion-conductive cotton fabric.

2. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 1, characterized in that: In the step 2, urea is used to adjust the pH value to 7.

3. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 1, characterized in that: The initiator is dicyandiamide.

4. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 1, characterized in that: The imidazole hexafluorophosphate ionic liquid raw material is specifically any one of 1-vinyl-3-methylimidazole hexafluorophosphate, 1-allyl-3-methylimidazole hexafluorophosphate, 1-vinyl-3-ethylimidazole hexafluorophosphate, 1-vinyl-3-butylimidazole hexafluorophosphate, 1-vinyl-3-hexylimidazole hexafluorophosphate, 1-vinyl-3-octylimidazole hexafluorophosphate, and 1-vinyl-3-dodecylimidazole hexafluorophosphate.

5. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 1, characterized in that: The precursor solution adopts 1-butyl-3-methylimidazolium hexafluorophosphate.

6. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 1, characterized in that: The cross-linking agent is methylene bisacrylamide.

7. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 6, characterized in that: The photoinitiator is 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone.

8. The method for preparing the antibacterial, flame retardant and ion conductive cotton fabric according to claim 7, characterized in that: The mass fraction ratio between the imidazole hexafluorophosphate ionic liquid raw material and the crosslinking agent or the photoinitiator is 100:1.

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