BIT alkali and acid resistant curing textile yarn and preparation method thereof

Abstract

The invention relates to a BIT alkali and acid resistant curing textile yarn and a preparation method thereof, and belongs to the technical field of textile. According to the preparation method, polyester fibers, bamboo charcoal fibers, a self-made BIT modified polyurethane urea solution and an ultraviolet light absorber are used as raw materials, and the BIT acid and alkali resistant curing textile yarn is prepared. Performing electrostatic spinning on the pre-prepared mixed solution, washing with an ethanol solution, and drying to obtain antibacterial fibers; and finally, mixing the antibacterial fibers with polyester fibers and bamboo charcoal fibers, and spinning in a spinning machine to obtain the BIT acid and alkali resistant cured textile yarn. According to the invention, the 1, 2-benzisothiazolin-3-one antibacterial agent is prepared into the polyurethane urea solution, and then the polyurethane fiber is prepared through electrostatic spinning, so that the chemical stability of the 1, 2-benzisothiazolin-3-one is greatly improved, and the 1, 2-benzisothiazolin-3-one can still exert excellent antibacterial performance.

Description

Technical Field

[0001] The invention belongs to the field of textile technology, and in particular relates to a BIT alkali-acid-resistant cured textile yarn and a preparation method thereof. Background Art

[0002] 1,2-Benzisothiazoline-3-one (BIT) is an excellent broad-spectrum antimicrobial agent with the advantages of strong antimicrobial ability, small application dosage, good compatibility, low toxicity, etc. It can kill a variety of bacteria and fungi, has good degradability, and will not leave residues. 1,2-Benzisothiazoline-3-one has a strong penetrating effect on microbial cell walls and cell membranes, and can enter the cells to act on proteins and other molecules containing S elements, so that the S atoms in the 1,2-benzisothiazolin-3-one molecules are attacked by nucleophilic reagents, resulting in the SN bond breaking and forming SS bonds with receptors, thereby destroying the normal physiological functions of microbial cells. In the textile industry, in order to improve the antibacterial properties of textiles, this type of antimicrobial agent is often used for antibacterial finishing.

[0003] However, 1,2-benzisothiazolin-3-one has strong reactivity and is greatly affected by pH. Once the alkaline environment is too strong, the active structures in 1,2-benzisothiazolin-3-one will be inactivated and lose their antibacterial activity, which greatly limits the application conditions of 1,2-benzisothiazolin-3-one antibacterial agents. Based on this, the present invention provides a BIT acid- and alkali-resistant cured textile yarn and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide a BIT alkali-acid-resistant cured textile yarn and a preparation method thereof, so as to solve the problems mentioned in the above background technology.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A BIT alkali-acid-resistant curing textile yarn comprises the following raw materials in parts by weight: 35-48 parts of polyester fiber, 12-15 parts of bamboo charcoal fiber, 22-30 parts of BIT-modified polyurethane urea solution, and 0.08-0.12 parts of ultraviolet absorber;

[0007] A method for preparing BIT alkali-acid-resistant cured textile yarn comprises the following steps:

[0008] The first step is to weigh the raw materials according to the mass proportions: 35-48 parts of polyester fiber, 12-15 parts of bamboo charcoal fiber, 22-30 parts of BIT modified polyurethane urea solution, and 0.08-0.12 parts of ultraviolet absorber;

[0009] Step 2: adding the ultraviolet absorber to the BIT-modified polyurethane urea solution, stirring and mixing at room temperature to obtain a spinning preform;

[0010] The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, prepare fibers by electrostatic spinning technology, and then wash the prepared fibers with an ethanol solution and dry them to obtain an antibacterial fiber;

[0011] The fourth step is to mix the dried antibacterial fiber with polyester fiber and bamboo charcoal fiber and then spin them in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn.

[0012] Furthermore, the ultraviolet absorber is one of Tinuvin622, Tinuvin328, TSA-011 or a mixture of several thereof.

[0013] Furthermore, in the second step, the rotation speed of the stirring and mixing is 150-200 r / min, and the time of the stirring and mixing is 60-90 min.

[0014] Furthermore, in the third step, the voltage conditions of electrospinning are 12-18 kV, the solution flow rate is 0.4-0.8 mL / h, and the needle distance is 10-16 cm.

[0015] Furthermore, the ethanol solution used for washing in the third step is an ethanol aqueous solution with a volume fraction of 75%, and the temperature condition for drying after washing is 40-60°C.

[0016] Furthermore, the BIT-modified polyurethane urea solution is prepared by the following steps.

[0017] Step 1, 1,2-benzisothiazolin-3-one, acetone, 2-hydroxy-4-(hydroxymethyl)benzaldehyde, proline and dimethyl sulfoxide were mixed in a three-necked flask, magnetic stirring was turned on, and the mixture was reacted at room temperature for 2-3 hours. After the reaction was completed, a saturated ammonium chloride solution was added to the three-necked flask to quench the reaction. After the organic layer was separated by a separatory funnel, the organic layer was evaporated to remove the solvent, and the remaining solid was washed with deionized water and dried to obtain an intermediate 1;

[0018] Step 2, mix the intermediate 1, ethyl bromide and acetonitrile in a three-necked flask, install a condenser and a thermometer, start magnetic stirring, react at a temperature of 20-30°C for 24 hours, and after the reaction is completed, rotary evaporate to obtain the intermediate 2;

[0019] Step 3, polytetrahydrofuran and 4,4'-diphenylmethane diisocyanate are mixed in a three-necked flask, a condenser and a thermometer are installed, magnetic stirring is turned on, the system temperature is raised to 75-85°C under nitrogen protection conditions, and then the first batch of dibutyltin laurate is added to the three-necked flask, and the reaction is carried out at a temperature of 75-85°C for 1.5h, and then the intermediate 2 is dissolved with N,N-dimethylformamide and added to the three-necked flask, and the second batch of dibutyltin laurate is added to the three-necked flask, and the reaction is continued at 75-85°C for 2h, and then the system temperature is reduced to 40-50°C, and ethylenediamine is added to the three-necked flask, and the reaction is continued for 30-50min. After the reaction is completed, the BIT-modified polyurethane urea solution is obtained.

[0020] Furthermore, the amount ratio of 1,2-benzisothiazolin-3-one, acetone, 2-hydroxy-4-(hydroxymethyl)benzaldehyde, proline and dimethyl sulfoxide used in step 1 is 0.1-0.11 mol: 0.1-0.13 mol: 0.1 mol: 0.02 mol: 100-120 mL.

[0021] Furthermore, the usage ratio of intermediate 1, ethyl bromide and acetonitrile used in step 2 is 0.08 mol: 0.09-0.11 mol: 40-60 mL.

[0022] Furthermore, the polytetrahydrofuran used in step 3 is one of polytetrahydrofuran 1000, polytetrahydrofuran 1400, and polytetrahydrofuran 1800.

[0023] Furthermore, the amount ratio of polytetrahydrofuran, 4,4'-diphenylmethane diisocyanate, the first batch of dibutyltin laurate, intermediate 2, N,N-dimethylformamide, the second batch of dibutyltin laurate, and ethylenediamine used in step 3 is 0.01mol: 0.012-0.013mol: 0.006-0.012g: 0.001mol: 70-120mL: 0.004-0.008g: 0.002-0.003mol.

[0024] Beneficial effects of the present invention:

[0025] 1) The present invention uses polyester fiber, bamboo charcoal fiber, homemade BIT modified polyurethane urea solution and ultraviolet absorber as raw materials to prepare a BIT acid-alkali resistant cured textile yarn. The present invention prepares a prefabricated mixed liquid by first adding the ultraviolet absorber into the homemade BIT modified polyurethane urea solution, and then washing and drying the prefabricated mixed liquid with an ethanol solution through electrostatic spinning to obtain an antibacterial fiber. Finally, the antibacterial fiber is mixed with polyester fiber and bamboo charcoal fiber and then spun in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn. The present invention prepares a polyurethane urea solution with 1,2-benzisothiazolin-3-one antibacterial agent and then prepares the polyurethane fiber through electrostatic spinning, thereby greatly improving the alkali resistance of 1,2-benzisothiazolin-3-one and still exerting excellent antibacterial properties.

[0026] 2) The present invention uses 1,2-benzisothiazolin-3-one, acetone, and 2-hydroxy-4-(hydroxymethyl)benzaldehyde as raw materials, obtains intermediate 1 through Mannich condensation under proline catalysis conditions, and then uses intermediate 1 and ethyl bromide as raw materials to obtain intermediate 2 through quaternary ammonium salt reaction, and finally uses intermediate 2 as an isocyanate polymerization chain extender, first polymerizes polytetrahydrofuran and 4,4'-diphenylmethane diisocyanate under the catalytic action of dibutyltin laurate to form a prepolymer, and then adds the chain extender intermediate 2 and ethylenediamine to react respectively to obtain a BIT-modified polyurethane urea solution. The present invention provides a BIT-modified polyurethane urea solution. The polyurethane urea emulsion is a precursor of polyurethane fiber, and polyurethane fiber can be obtained by electrostatic spinning. The present invention prepares 1,2-benzisothiazolin-3-one into a Mannich base quaternary ammonium salt and polymerizes it in a polyurethane urea solution, thereby greatly improving the alkali resistance of 1,2-benzisothiazolin-3-one. At the same time, the active structure of 1,2-benzisothiazolin-3-one also has a quaternary ammonium salt structure, which can combine with anionic sites in the external tissue of bacteria, further improving the antibacterial property of 1,2-benzisothiazolin-3-one. Therefore, the prepared BIT alkali-acid-resistant cured textile yarn has good antibacterial stability.

[0027] 3) The BIT alkali-acid-resistant curing textile yarn of the present invention is a mixed yarn obtained by mixing and spinning polyester fiber, bamboo charcoal fiber and homemade antibacterial fiber, which combines the advantages of polyester fiber and bamboo charcoal fiber, has good elasticity and recovery ability, excellent strength, antibacterial and breathable, strong and wear-resistant, and can be widely used in the field of clothing fabrics DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] A BIT-modified polyurethane urea solution is prepared by the following steps:

[0031] Step 1, 0.1 mol 1,2-benzisothiazolin-3-one, 0.1 mol acetone, 0.1 mol 2-hydroxy-4-(hydroxymethyl)benzaldehyde, 0.02 mol proline, and 100 mL dimethyl sulfoxide were mixed in a three-necked flask, magnetic stirring was turned on, and the reaction was carried out at room temperature for 2 hours. After the reaction was completed, a saturated ammonium chloride solution was added to the three-necked flask to quench the reaction, and the organic layer was separated by a separatory funnel. The organic layer was evaporated to remove the solvent, and the remaining solid was washed with deionized water and dried to obtain intermediate 1;

[0032] Step 2, 0.08 mol of intermediate 1, 0.09 mol of ethyl bromide and 40 mL of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 20°C for 24 hours. After the reaction was completed, the intermediate 2 was obtained by rotary evaporation;

[0033] Step 3, 0.01mol polytetrahydrofuran 1000 and 0.12mol 4,4'-diphenylmethane diisocyanate were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, the system temperature was raised to 75°C under nitrogen protection conditions, and then 0.006g dibutyltin laurate was added to the three-necked flask, and the reaction was carried out at a temperature of 75°C for 1.5h, then 0.001mol intermediate 2 was dissolved in 70mL N,N-dimethylformamide and added to the three-necked flask, and 0.004g dibutyltin laurate was added to the three-necked flask, and the reaction was continued at 75°C for 2h, and then the system temperature was reduced to 40°C, and 0.002mol ethylenediamine was added to the three-necked flask, and the reaction was continued for 30min. After the reaction, a BIT-modified polyurethane urea solution was obtained.

[0034] Example 2

[0035] A BIT-modified polyurethane urea solution is prepared by the following steps:

[0036] Step 1, 0.105 mol 1,2-benzisothiazolin-3-one, 0.115 mol acetone, 0.1 mol 2-hydroxy-4-(hydroxymethyl)benzaldehyde, 0.02 mol proline, and 110 mL dimethyl sulfoxide were mixed in a three-necked flask, magnetic stirring was turned on, and the mixture was reacted at room temperature for 2.5 h. After the reaction was completed, a saturated ammonium chloride solution was added to the three-necked flask to quench the reaction. After the organic layer was separated with a separatory funnel, the organic layer was rotary evaporated to remove the solvent, and the remaining solid was washed with deionized water and dried to obtain intermediate 1;

[0037] Step 2, 0.08 mol of intermediate 1, 0.1 mol of ethyl bromide and 50 mL of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 25°C for 24 hours. After the reaction was completed, the intermediate 2 was obtained by rotary evaporation;

[0038] Step 3, 0.01 mol of polytetrahydrofuran 1400 and 0.125 mol of 4,4'-diphenylmethane diisocyanate were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, the system temperature was raised to 80°C under nitrogen protection conditions, and then 0.009 g of dibutyltin laurate was added to the three-necked flask, and the reaction was carried out at a temperature of 80°C for 1.5 hours, then 0.001 mol of intermediate 2 was dissolved in 95 mL of N,N-dimethylformamide and added to the three-necked flask, and 0.006 g of dibutyltin laurate was added to the three-necked flask, and the reaction was continued at 80°C for 2 hours, and then the system temperature was reduced to 45°C, and 0.0025 mol of ethylenediamine was added to the three-necked flask, and the reaction was continued for 40 minutes. After the reaction, a BIT-modified polyurethane urea solution was obtained.

[0039] Example 3

[0040] A BIT-modified polyurethane urea solution is prepared by the following steps:

[0041] Step 1, 0.11 mol 1,2-benzisothiazolin-3-one, 0.13 mol acetone, 0.1 mol 2-hydroxy-4-(hydroxymethyl)benzaldehyde, 0.02 mol proline, and 120 mL dimethyl sulfoxide were mixed in a three-necked flask, magnetic stirring was turned on, and the mixture was reacted at room temperature for 3 h. After the reaction was completed, a saturated ammonium chloride solution was added to the three-necked flask to quench the reaction. After the organic layer was separated with a separatory funnel, the organic layer was rotary evaporated to remove the solvent, and the remaining solid was washed with deionized water and dried to obtain intermediate 1;

[0042] Step 2, 0.08 mol of intermediate 1, 0.11 mol of ethyl bromide and 60 mL of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 30°C for 24 hours. After the reaction was completed, the intermediate 2 was obtained by rotary evaporation;

[0043] Step 3, 0.01mol polytetrahydrofuran 1800 and 0.13mol 4,4'-diphenylmethane diisocyanate were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, the system temperature was raised to 85°C under nitrogen protection conditions, and then 0.012g dibutyltin laurate was added to the three-necked flask, and the reaction was carried out at a temperature of 85°C for 1.5h, then 0.001mol intermediate 2 was dissolved in 120mL N,N-dimethylformamide and added to the three-necked flask, and 0.008g dibutyltin laurate was added to the three-necked flask, and the reaction was continued at 85°C for 2h, and then the system temperature was reduced to 50°C, and 0.003mol ethylenediamine was added to the three-necked flask, and the reaction was continued for 50min. After the reaction, a BIT-modified polyurethane urea solution was obtained.

[0044] Example 4

[0045] A polyurethane urea solution is prepared by the following steps:

[0046] 0.01 mol of polytetrahydrofuran 1800 and 0.13 mol of 4,4'-diphenylmethane diisocyanate were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, the system temperature was raised to 85°C under nitrogen protection conditions, and then 0.012 g of dibutyltin laurate was added to the three-necked flask, and the reaction was carried out at a temperature of 85°C for 1.5 hours. Subsequently, 0.001 mol of 1,4-butanediol was dissolved in 120 mL of N,N-dimethylformamide and added to the three-necked flask, and 0.008 g of dibutyltin laurate was added to the three-necked flask, and the reaction was continued at 85°C for 2 hours. Then, the system temperature was reduced to 50°C, and 0.003 mol of ethylenediamine was added to the three-necked flask, and the reaction was continued for 50 minutes. After the reaction, a polyurethane urea solution was obtained.

[0047] Example 5

[0048] A BIT alkali-acid-resistant curing textile yarn comprises the following raw materials in parts by weight: 35 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the BIT-modified polyurethane urea solution obtained in Example 1, and 0.08 parts of Tinuvin 622;

[0049] A method for preparing BIT alkali-acid-resistant cured textile yarn comprises the following steps:

[0050] The first step is to weigh 35 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the BIT-modified polyurethane urea solution obtained in Example 1, and 0.08 parts of Tinuvin 622 according to the mass fractions;

[0051] In the second step, Tinuvin 622 was added to the BIT-modified polyurethane urea solution obtained in Example 1, and the mixture was stirred at a speed of 150 r / min for 60 min at room temperature to obtain a spinning preform.

[0052] The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, and prepare fibers by electrospinning technology, and then wash the prepared fibers with a 75% volume fraction ethanol aqueous solution and dry them at a temperature of 40°C to obtain an antibacterial fiber, wherein the voltage condition of electrospinning is 12 kV, the solution flow rate is 0.4 mL / h, and the needle distance is 10 cm;

[0053] The fourth step is to mix the dried antibacterial fiber with polyester fiber and bamboo charcoal fiber and then spin them in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn.

[0054] Example 6

[0055] A BIT alkali-acid-resistant curing textile yarn comprises the following raw materials in parts by weight: 35 parts of polyester fiber, 15 parts of bamboo charcoal fiber, 30 parts of the BIT-modified polyurethane urea solution obtained in Example 2, and 0.1 parts of Tinuvin 328;

[0056] A method for preparing BIT alkali-acid-resistant cured textile yarn comprises the following steps:

[0057] The first step is to weigh 35 parts of polyester fiber, 15 parts of bamboo charcoal fiber, 30 parts of the BIT-modified polyurethane urea solution obtained in Example 2, and 0.1 parts of Tinuvin 328 according to the mass fractions;

[0058] In the second step, Tinuvin 328 was added to the BIT-modified polyurethane urea solution obtained in Example 2, and the mixture was stirred at a speed of 175 r / min for 75 min at room temperature to obtain a spinning preform.

[0059] The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, and prepare fibers by electrospinning technology, and then wash the prepared fibers with a volume fraction of 75% ethanol aqueous solution and dry them at a temperature of 50°C to obtain an antibacterial fiber, wherein the voltage condition of electrospinning is 15 kV, the solution flow rate is 0.6 mL / h, and the needle distance is 13 cm;

[0060] The fourth step is to mix the dried antibacterial fiber with polyester fiber and bamboo charcoal fiber and then spin them in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn.

[0061] Example 7

[0062] A BIT alkali-acid-resistant curing textile yarn comprises the following raw materials in parts by weight: 48 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the BIT-modified polyurethane urea solution obtained in Example 3, and 0.12 parts of TSA-011;

[0063] A method for preparing BIT alkali-acid-resistant cured textile yarn comprises the following steps:

[0064] The first step is to weigh 48 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the BIT-modified polyurethane urea solution obtained in Example 3, and 0.12 parts of TSA-011 according to the mass fractions;

[0065] In the second step, TSA-011 was added to the BIT-modified polyurethane urea solution obtained in Example 3, and the mixture was stirred at a speed of 200 r / min for 90 minutes at room temperature to obtain a spinning preform.

[0066] The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, and prepare fibers by electrospinning technology, and then wash the prepared fibers with a 75% volume fraction ethanol aqueous solution and dry them at a temperature of 60°C to obtain an antibacterial fiber, wherein the voltage condition of electrospinning is 18 kV, the solution flow rate is 0.8 mL / h, and the needle distance is 16 cm;

[0067] The fourth step is to mix the dried antibacterial fiber with polyester fiber and bamboo charcoal fiber and then spin them in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn.

[0068] Comparative Example 1

[0069] The dried polyester yarn and the bamboo charcoal fiber are mixed and then spun in a spinning machine to obtain a mixed yarn.

[0070] Comparative Example 2

[0071] A BIT textile yarn comprises the following raw materials in parts by weight: 48 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the polyurethane urea solution obtained in Example 4, 0.06 parts of 1,2-benzisothiazolin-3-one, and 0.12 parts of TSA-011;

[0072] A method for preparing BIT alkali-acid-resistant cured textile yarn comprises the following steps:

[0073] The first step is to weigh 48 parts of polyester fiber, 12 parts of bamboo charcoal fiber, 22 parts of the polyurethane urea solution obtained in Example 4, 0.06 parts of 1,2-benzisothiazolin-3-one, and 0.12 parts of TSA-011 according to the mass fractions;

[0074] In the second step, TSA-011 and 1,2-benzisothiazolin-3-one were added to the polyurethane urea solution obtained in Example 4, and the mixture was stirred at a speed of 200 r / min for 90 minutes at room temperature to obtain a spinning preform.

[0075] The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, and prepare fibers by electrospinning technology, and then wash the prepared fibers with a 75% volume fraction ethanol aqueous solution and dry them at a temperature of 60°C to obtain an antibacterial fiber, wherein the voltage condition of electrospinning is 18 kV, the solution flow rate is 0.8 mL / h, and the needle distance is 16 cm;

[0076] The fourth step is to mix the dried antibacterial fiber with the polyester fiber and the bamboo charcoal fiber and then spin the mixture in a spinning machine to obtain a BIT textile yarn.

[0077] Comparative Example 3

[0078] This comparative example is the antibacterial yarn sold by Zhejiang Huilong New Materials Co., Ltd.

[0079] Two portions of each of the BIT acid- and alkali-resistant cured textile yarn obtained in Examples 5-7, the mixed yarn in Comparative Example 1, the BIT textile yarn in Comparative Example 2, and the commercially available antibacterial yarn in Comparative Example 3 were tested for antibacterial properties according to the national standard GB / T20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Oscillation Method". The first portion was directly tested for antibacterial ability against Staphylococcus aureus, Escherichia coli, and Candida albicans, and the conventional polyester fiber was used as a blank control. The second portion was immersed in a sodium hydroxide aqueous solution with a pH of 10 for 2 hours, and then tested for antibacterial ability against Staphylococcus aureus, Escherichia coli, and Candida albicans, and the conventional polyester fiber was used as a blank control. The test results are shown in Table 1:

[0080] Table 1

[0081]

[0082]

[0083] It can be seen from Table 1 that the BIT acid- and alkali-resistant cured textile yarn of the present invention has better antibacterial ability and excellent alkali resistance than the commercially available antibacterial yarn. Comparative Examples 1-2 respectively carried out control tests on other raw materials used in the present invention. The mixed bamboo charcoal fiber in Comparative Example 1 can also improve the antibacterial performance of polyester fiber, but the effect is not good. In Comparative Example 2, 1,2-benzisothiazolin-3-one is added to the polyurethane urea solution by a conventional method, and is not modified by a quaternary ammonium salt. Although it also has excellent antibacterial properties, it is greatly affected by pH. The antibacterial properties will be inactivated after contacting an alkaline environment. In summary, the BIT acid- and alkali-resistant cured textile yarn prepared by the present invention has excellent antibacterial properties and excellent alkali resistance, and can be widely used in the field of clothing fabrics.

[0084] The above is a detailed introduction to a BIT alkali-acid-resistant cured textile yarn and a preparation method thereof provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enables any technician in the field to practice the present invention, including the manufacture and use of any device or system, and the implementation of any combination method. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be used in combination with each other in any way. The fact that these combinations are not exhaustively described in this specification is only for the purpose of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A BIT alkali-acid-resistant cured textile yarn, characterized in that: The invention comprises the following raw materials in parts by weight: 35-48 parts of polyester fiber, 12-15 parts of bamboo charcoal fiber, 22-30 parts of BIT modified polyurethane urea solution, and 0.08-0.12 parts of ultraviolet absorber; Wherein, the BIT-modified polyurethane urea solution is prepared by the following steps: Step 1, 1,2-benzisothiazolin-3-one, acetone, 2-hydroxy-4-(hydroxymethyl)benzaldehyde, proline and dimethyl sulfoxide are mixed in a container, stirred evenly, and reacted at room temperature for 2-3 hours to obtain intermediate 1; Step 2, intermediate 1, ethyl bromide and acetonitrile are mixed in a container, stirred evenly, and reacted at a temperature of 20-30° C. for 24 hours to obtain intermediate 2; Step 3, polytetrahydrofuran and 4,4'-diphenylmethane diisocyanate are mixed in a container, stirred evenly, the system temperature is raised to 75-85°C under nitrogen protection conditions, and then the first batch of dibutyltin laurate is added to the container, and the reaction is carried out at a temperature of 75-85°C for 1.5 hours, and then the intermediate 2 is dissolved with N,N-dimethylformamide and added to the container, and the second batch of dibutyltin laurate is added to the container, and the reaction is continued at 75-85°C for 2 hours, and then the system temperature is reduced to 40-50°C, and ethylenediamine is added to the container, and the reaction is continued for 30-50 minutes to obtain the BIT-modified polyurethane urea solution.

2. A BIT alkali-acid-resistant curing textile yarn according to claim 1, characterized in that: The amount ratio of 1,2-benzisothiazolin-3-one, acetone, 2-hydroxy-4-(hydroxymethyl)benzaldehyde, proline and dimethyl sulfoxide used in step 1 is 0.1-0.11 mol: 0.1-0.13 mol: 0.1 mol: 0.02 mol: 100-120 mL.

3. The BIT alkali-acid-resistant curing textile yarn according to claim 1, characterized in that: The amount ratio of intermediate 1, ethyl bromide and acetonitrile used in step 2 is 0.08 mol: 0.09-0.11 mol: 40-60 mL.

4. The BIT alkali-acid-resistant curing textile yarn according to claim 1, characterized in that: The polytetrahydrofuran used in step 3 is one of polytetrahydrofuran 1000, polytetrahydrofuran 1400 and polytetrahydrofuran 1800.

5. The BIT alkali-acid-resistant curing textile yarn according to claim 1, characterized in that: The amount ratio of polytetrahydrofuran, 4,4'-diphenylmethane diisocyanate, the first batch of dibutyltin laurate, intermediate 2, N,N-dimethylformamide, the second batch of dibutyltin laurate, and ethylenediamine used in step 3 is 0.01mol: 0.012-0.013mol: 0.006-0.012g: 0.001mol: 70-120mL: 0.004-0.008g: 0.002-0.003mol.

6. A method for preparing the BIT alkali-acid-resistant cured textile yarn according to claim 1, characterized in that: The method comprises the following preparation steps: The first step is to weigh the raw materials according to the mass proportions: 35-48 parts of polyester fiber, 12-15 parts of bamboo charcoal fiber, 22-30 parts of BIT modified polyurethane urea solution, and 0.08-0.12 parts of ultraviolet absorber; Step 2: adding the ultraviolet absorber to the BIT-modified polyurethane urea solution, stirring and mixing at room temperature to obtain a spinning preform; The third step is to add the spinning preformed liquid obtained in the second step into the spinning tube, prepare fibers by electrostatic spinning technology, and then wash the prepared fibers with an ethanol solution and dry them to obtain an antibacterial fiber; The fourth step is to mix the dried antibacterial fiber with polyester fiber and bamboo charcoal fiber and then spin them in a spinning machine to obtain a BIT acid-alkali resistant cured textile yarn.

7. The method for preparing a BIT alkali-acid-resistant cured textile yarn according to claim 6, characterized in that: The ultraviolet absorber is one of Tinuvin622, Tinuvin328 and TSA-011 or a mixture of several thereof.

8. The method for preparing a BIT alkali-acid-resistant cured textile yarn according to claim 6, characterized in that: In the second step, the stirring and mixing speed condition is 150-200r / min, and the stirring and mixing time condition is 60-90min.

9. The method for preparing a BIT alkali-acid-resistant cured textile yarn according to claim 6, characterized in that: In the third step, the voltage conditions of electrospinning were 12-18 kV, the solution flow rate was 0.4-0.8 mL / h, and the needle distance was 10-16 cm.

10. The method for preparing a BIT alkali-acid-resistant cured textile yarn according to claim 6, characterized in that: The ethanol solution used for washing in the third step is an ethanol aqueous solution with a volume fraction of 75%, and the temperature condition for drying after washing is 40-60°C.

Images