A kind of moisture-absorbing antibacterial fabric and preparation method thereof

Abstract

The invention relates to a hygroscopic and antibacterial fabric and a preparation method thereof, and belongs to the technical field of textiles. The invention prepares a modified solution by dissolving a fabric modifier and an initiator with a solvent, modifies polyester fibers with the modified solution to obtain modified polyester fibers, and finally weaves the modified polyester fibers and blended fibers to obtain a hygroscopic and antibacterial fabric. The invention grafts and modifies the surface of polyester fibers to obtain modified polyester fibers, which retain the advantages of polyester fibers, have excellent strength and wear resistance, outstanding elastic recovery ability, and are not easy to wrinkle. The polyester fibers modified by the fabric modifier solve the problem of insufficient hygroscopicity caused by surface hydrophobicity and have antibacterial properties. The blended fabric finally obtained has good hygroscopicity and air permeability and antibacterial properties.

Description

Technical Field

[0001] The invention belongs to the field of textile technology, and in particular relates to a moisture-absorbing and antibacterial fabric and a preparation method thereof. Background Art

[0002] Polyester fabric is a widely used synthetic fiber fabric. Polyester fabric has high strength, is not easy to wear or tear, is durable, has good wrinkle resistance, is easy to clean, has excellent elastic recovery ability, is not easy to deform and wrinkle, and is one of the most heat-resistant materials. It is deeply loved by consumers in the market.

[0003] However, polyester fabrics also have some disadvantages that are difficult to ignore. The hygroscopicity of polyester fabrics is not as good as that of natural fibers, such as cotton and linen. This is because the molecular chains on the surface of polyester fibers are covered with a large number of non-polar ester groups. These non-polar groups make it difficult for water molecules to form hydrogen bonds or other strong interactions with the fiber surface. Therefore, the fiber surface exhibits hydrophobicity. Therefore, in the humid environment of summer, polyester fabrics may not be able to absorb and discharge sweat in time, causing the wearer to feel stuffy. Therefore, the air permeability is poor, which greatly limits the use of polyester fabrics in summer clothes. In addition, polyester fibers themselves lack antibacterial properties. Based on this, the present invention provides a hygroscopic and antibacterial fabric and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide a moisture-absorbing and antibacterial fabric 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 through the following technical solutions:

[0006] A moisture-absorbing and antibacterial fabric comprises the following raw materials in parts by weight: 100 parts of polyester fiber, 80 parts of blended fiber, 8-10 parts of fabric modifier, 0.2-0.4 parts of initiator, and 2500-3000 parts of solvent;

[0007] A method for preparing a moisture-absorbing and antibacterial fabric comprises the following steps:

[0008] The first step is to weigh the raw materials according to the mass proportions: 100 parts of polyester fiber, 80 parts of blended fiber, 8-10 parts of fabric modifier, 0.2-0.4 parts of initiator, and 2500-3000 parts of solvent;

[0009] Step 2: Add the fabric modifier and initiator into a container, add a solvent into the container, and stir and dissolve at room temperature to obtain a modified solution;

[0010] Step 3: Add polyester fiber to the modified solution, continue stirring to react, then take out the polyester fiber, squeeze out excess impregnation solution, and dry to obtain modified polyester fiber;

[0011] The fourth step is to wash the modified polyester fiber with an ethanol solution, dry it and use it as the warp, and use the blended fiber as the weft. The warp and weft are woven to obtain a moisture-absorbing and antibacterial fabric.

[0012] Furthermore, the blended fiber is one or a mixture of acrylic fiber, cotton fiber and spandex fiber.

[0013] Furthermore, the initiator is one of benzoyl peroxide and azobisisobutyronitrile.

[0014] Furthermore, the solvent is N,N-dimethylacetamide.

[0015] Furthermore, in the third step, the stirring speed condition is 150-250rpm, the stirring time condition is 40-60min, the rolling rate is 100%, and the drying condition is pre-baking at a temperature of 50°C for 10min and then baking at a temperature of 110°C for 10min.

[0016] Furthermore, the ethanol solution used in the fourth step is an ethanol aqueous solution with a volume fraction of 75%, and the drying condition is to dry to constant weight at a temperature of 50-60°C.

[0017] Furthermore, the fabric modifier is prepared by the following steps:

[0018] Step 1, pyrogallol and glacial acetic acid 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 70-90°C, and then a glacial acetic acid solution of hexamethylenetetramine is added dropwise to the three-necked flask for 0.5h. After the addition is completed, the reaction is continued at a temperature of 70-90°C for 3-4h, and then cooled to room temperature, and dilute hydrochloric acid is added to the three-necked flask, and then stirring is continued for 1h. After the reaction is completed, extraction is performed with dichloromethane, and the organic layer is separated with a separatory funnel. The organic layer is rotary evaporated to obtain intermediate 1;

[0019] Step 2, the intermediate 1, N-methylallylamine, lauric acid and deionized water 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 80°C, and the reaction is carried out at a temperature of 80°C for 0.5h, then pyridine is added to the three-necked flask, and the reaction is continued at a temperature of 80°C for 4-5h. After the reaction is completed, extraction is carried out with dichloromethane, and the organic layer is separated with a separatory funnel. The organic layer is rotary evaporated and subjected to silica gel column chromatography to obtain the intermediate 2;

[0020] Step 3, the intermediate 2, butyl chloride and acetonitrile are mixed in a three-necked flask, a condenser and a thermometer are installed, magnetic stirring is turned on, and the reaction is carried out at a temperature of 40-60° C. for 12-16 hours. After the reaction is completed, rotary evaporation is performed to obtain the fabric modifier;

[0021] Furthermore, the glacial acetic acid solution of hexamethylenetetramine used in step 1 is prepared from 0.15 mol of hexamethylenetetramine and 40 mL of glacial acetic acid, and the concentration of the dilute hydrochloric acid used in step 1 is 4 mol / L.

[0022] Furthermore, the dosage ratio of pyrogallol, glacial acetic acid, glacial acetic acid solution of hexamethylenetetramine, and dilute hydrochloric acid used in step 1 is 0.09-0.11 mol: 50-60 mL: 63 g: 60-80 mL.

[0023] Furthermore, the usage ratio of intermediate 1, N-methylallylamine, lauric acid, deionized water and pyridine used in step 2 is 0.06 mol: 0.06-0.07 mol: 0.012-0.014 mol: 80-100 mL: 0.06 mol.

[0024] Furthermore, the usage ratio of the intermediate 2, butyl chloride and acetonitrile used in step 3 is 0.03 mol: 0.06-0.08 mol: 40-60 mL.

[0025] Beneficial effects of the present invention:

[0026] The invention prepares a modified solution by dissolving a fabric modifier and an initiator in a solvent, modifies polyester fibers with the modified solution to obtain modified polyester fibers, and finally weaves the modified polyester fibers and blended fibers to obtain a hygroscopic and antibacterial fabric. The invention grafts and modifies the surface of polyester fibers to obtain modified polyester fibers, which retain the advantages of polyester fibers, have excellent strength and wear resistance, outstanding elastic recovery ability, and are not easy to wrinkle. The polyester fibers modified by the fabric modifier solve the problem of insufficient hygroscopicity caused by surface hydrophobicity and have antibacterial properties. The blended fabric finally obtained has good hygroscopicity and air permeability and antibacterial properties.

[0027] The invention uses pyrogallol and urotropine as raw materials, obtains a formylated pyrogallol intermediate 1 through a Duff reaction under the action of glacial acetic acid, then uses the intermediate 1, N-methylallylamine and pyridine as raw materials, obtains an intermediate 2 with a double bond and a pyridine ring structure through a Mannich reaction under the catalytic action of lauric acid, and finally uses the intermediate 2 as a raw material, utilizes the intermediate 2 to react with butyl chloride to produce a quaternary ammonium salt to obtain a fabric modifier; the fabric modifier contains a double bond, can be grafted on the surface of a polyester fiber under the action of an initiator to modify the polyester fiber, contains a large amount of hydrophilic phenolic hydroxyl groups, is easy to form hydrogen bonds with water molecules, can improve the moisture absorption performance of the polyester fiber, and furthermore, the fabric modifier also has a pyridyl quaternary ammonium salt structure, can give the polyester fiber good antibacterial performance, and make the performance of the polyester fiber more excellent. 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. Example 1

[0029] A fabric modifier is prepared by the following steps:

[0030] Step 1, 0.09 mol of pyrogallol and 50 mL of glacial acetic acid were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the system temperature was raised to 70°C, and then 63 g of a solution prepared by 0.15 mol of hexamethylenetetramine and 40 mL of glacial acetic acid was added dropwise to the three-necked flask for 0.5 h. After the addition was completed, the reaction was continued at 70°C for 3 h, and then cooled to room temperature, and 60 mL of 4 mol / L dilute hydrochloric acid was added to the three-necked flask, and then stirring was continued for 1 h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated to obtain intermediate 1;

[0031] Step 2, 0.06 mol of intermediate 1, 0.06 mol of N-methylallylamine, 0.012 mol of lauric acid and 80 mL of deionized water 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, and the reaction was carried out at 80°C for 0.5 h, then 0.06 mol of pyridine was added to the three-necked flask, and the reaction was continued at 80°C for 4 h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated and subjected to silica gel column chromatography to obtain intermediate 2;

[0032] Step 3: Mix 0.03 mol of intermediate 2, 0.06 mol of butyl chloride and 40 mL of acetonitrile in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at 40° C. for 12 h. After the reaction is completed, rotary evaporation is performed to obtain the fabric modifier. Example 2

[0033] A fabric modifier is prepared by the following steps:

[0034] Step 1, 0.1 mol of pyrogallol and 55 mL of glacial acetic acid were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the system temperature was raised to 80°C, and then 63 g of a solution prepared by 0.15 mol of hexamethylenetetramine and 40 mL of glacial acetic acid was added dropwise to the three-necked flask for 0.5 h. After the addition was completed, the reaction was continued at 80°C for 3.5 h, and then cooled to room temperature, and 70 mL of 4 mol / L dilute hydrochloric acid was added to the three-necked flask, and then stirring was continued for 1 h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated to obtain intermediate 1;

[0035] Step 2, 0.06 mol of intermediate 1, 0.065 mol of N-methylallylamine, 0.013 mol of lauric acid, and 90 mL of deionized water 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, and the reaction was carried out at 80°C for 0.5 h, then 0.06 mol of pyridine was added to the three-necked flask, and the reaction was continued at 80°C for 4.5 h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated and subjected to silica gel column chromatography to obtain intermediate 2;

[0036] Step 3: Mix 0.03 mol of intermediate 2, 0.07 mol of butyl chloride and 50 mL of acetonitrile in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at a temperature of 50° C. for 14 hours. After the reaction is completed, rotary evaporation is performed to obtain the fabric modifier. Example 3

[0037] A fabric modifier is prepared by the following steps:

[0038] Step 1, 0.11mol of pyrogallol and 60mL of glacial acetic acid were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the system temperature was raised to 90°C, and then 63g of a solution prepared by 0.15mol of hexamethylenetetramine and 40mL of glacial acetic acid was added dropwise to the three-necked flask for 0.5h. After the addition was completed, the reaction was continued at 90°C for 4h, and then cooled to room temperature, and 80mL of 4mol / L dilute hydrochloric acid was added to the three-necked flask, and then stirring was continued for 1h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated to obtain intermediate 1;

[0039] Step 2, 0.06 mol of intermediate 1, 0.07 mol of N-methylallylamine, 0.014 mol of lauric acid, and 100 mL of deionized water 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, and the reaction was carried out at 80°C for 0.5 h, then 0.06 mol of pyridine was added to the three-necked flask, and the reaction was continued at 80°C for 5 h. After the reaction was completed, it was extracted with dichloromethane, and the organic layer was separated with a separatory funnel. The organic layer was rotary evaporated and subjected to silica gel column chromatography to obtain intermediate 2;

[0040] Step 3: Mix 0.03 mol of intermediate 2, 0.08 mol of butyl chloride and 60 mL of acetonitrile in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at a temperature of 60° C. for 16 hours. After the reaction is completed, rotary evaporation is performed to obtain the fabric modifier. Example 4

[0041] A moisture-absorbing and antibacterial fabric comprises the following raw materials in parts by weight: 100 parts of polyester fiber, 80 parts of acrylic fiber, 8 parts of the fabric modifier obtained in Example 1, 0.2 parts of benzoyl peroxide, and 2500 parts of N,N-dimethylacetamide;

[0042] A method for preparing a moisture-absorbing and antibacterial fabric comprises the following steps:

[0043] The first step is to weigh the raw materials according to their mass fractions: 100 parts of polyester fiber, 80 parts of acrylic fiber, 8 parts of the fabric modifier obtained in Example 1, 0.2 parts of benzoyl peroxide, and 2500 parts of N,N-dimethylacetamide;

[0044] Step 2: Add the fabric modifier and benzoyl peroxide obtained in Example 1 into a container, and add N,N-dimethylacetamide into the container, and stir and dissolve at room temperature to obtain a modified solution;

[0045] The third step is to add polyester fiber to the modified solution and stir it at a speed of 150 rpm for 40 minutes, then take out the polyester fiber and squeeze out the excess impregnation solution, the squeezing rate is 100%, and finally pre-bake at a temperature of 50°C for 10 minutes and then bake at a temperature of 110°C for 10 minutes to obtain the modified polyester fiber;

[0046] The fourth step is to wash the modified polyester fiber with a 75% by volume ethanol solution, dry it at 50°C to constant weight and use it as the warp, and use the acrylic fiber as the weft. The warp and weft are woven to obtain a moisture-absorbing and antibacterial fabric. Example 5

[0047] A moisture-absorbing and antibacterial fabric comprises the following raw materials in parts by weight: 100 parts of polyester fiber, 80 parts of cotton fiber, 9 parts of the fabric modifier obtained in Example 2, 0.3 parts of benzoyl peroxide, and 2750 parts of N,N-dimethylacetamide;

[0048] A method for preparing a moisture-absorbing and antibacterial fabric comprises the following steps:

[0049] The first step is to weigh the raw materials according to their mass fractions: 100 parts of polyester fiber, 80 parts of cotton fiber, 9 parts of the fabric modifier obtained in Example 2, 0.3 parts of benzoyl peroxide, and 2750 parts of N,N-dimethylacetamide;

[0050] Step 2: Add the fabric modifier and benzoyl peroxide obtained in Example 2 into a container, and add N,N-dimethylacetamide into the container, and stir and dissolve at room temperature to obtain a modified solution;

[0051] The third step is to add polyester fiber to the modified solution and stir it at a speed of 200 rpm for 50 minutes, then take out the polyester fiber and squeeze out the excess impregnation solution, the squeezing rate is 100%, and finally pre-bake it at a temperature of 50°C for 10 minutes and then bake it at a temperature of 110°C for 10 minutes to obtain the modified polyester fiber;

[0052] The fourth step is to wash the modified polyester fiber with a 75% by volume ethanol solution, dry it at 55°C to constant weight and use it as the warp, and use cotton fiber as the weft. The warp and weft are woven to obtain a moisture-absorbing and antibacterial fabric. Example 6

[0053] A moisture-absorbing and antibacterial fabric comprises the following raw materials in parts by weight: 100 parts of polyester fiber, 80 parts of spandex fiber, 10 parts of the fabric modifier obtained in Example 3, 0.4 parts of azobisisobutyronitrile, and 3000 parts of N,N-dimethylacetamide;

[0054] A method for preparing a moisture-absorbing and antibacterial fabric comprises the following steps:

[0055] The first step is to weigh the raw materials according to their mass fractions: 100 parts of polyester fiber, 80 parts of spandex fiber, 10 parts of the fabric modifier obtained in Example 3, 0.4 parts of azobisisobutyronitrile, and 3000 parts of N,N-dimethylacetamide;

[0056] Step 2: Add the fabric modifier and azobisisobutyronitrile obtained in Example 3 into a container, and add N,N-dimethylacetamide into the container, and stir and dissolve at room temperature to obtain a modified solution;

[0057] The third step is to add polyester fiber to the modified solution and stir it at a speed of 250 rpm for 60 minutes, then take out the polyester fiber and squeeze out the excess impregnation solution, the squeezing rate is 100%, and finally pre-bake it at a temperature of 50°C for 10 minutes and then bake it at a temperature of 110°C for 10 minutes to obtain the modified polyester fiber;

[0058] The fourth step is to wash the modified polyester fiber with a 75% by volume ethanol solution, dry it at 60°C to constant weight and use it as the warp, and use the spandex fiber as the weft. The warp and weft are woven to obtain a moisture-absorbing and antibacterial fabric.

[0059] Comparative Example 1

[0060] A moisture-absorbing and antibacterial fabric comprises the following raw materials in parts by mass: 100 parts of polyester fibers and 80 parts of spandex fibers.

[0061] A method for preparing a hygroscopic and antibacterial fabric comprises taking polyester fibers as warps and spandex fibers as wefts, and weaving the warps and wefts to obtain the hygroscopic and antibacterial fabric.

[0062] Comparative Example 2

[0063] This comparative example is a commercially available polyester fabric.

[0064] The moisture regain of each group of fabrics was tested with reference to the national standard GB / T6503 "Test method for moisture regain of chemical fibers". The moisture regain refers to the percentage of the mass of water absorbed by the material under the condition of moisture absorption equilibrium to its dry mass. The moisture regain can reflect the moisture absorption performance. The higher the moisture regain, the stronger the moisture absorption performance. The antibacterial rate of each group of fabrics against Escherichia coli and Staphylococcus aureus was tested with reference to the national standard GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method". The test results are shown in Table 1:

[0065] Table 1

[0066]

[0067] It can be seen from Table 1 that the hygroscopic and antibacterial fabrics of the present invention in Examples 4-6 have good hygroscopicity and antibacterial effect, and their performance is better than that of commercially available polyester fabrics. However, the hygroscopic and antibacterial fabric in Comparative Example 1 has poor performance because the fabric modifier of the present invention is not used for grafting modification. In summary, the hygroscopic and antibacterial fabric of the present invention has good hygroscopicity and antibacterial performance, and can be widely used in the field of clothing fabrics.

[0068] The above is a detailed introduction to a hygroscopic and antibacterial fabric and a preparation method thereof provided by the present invention. The principle and implementation method of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention, including the best mode, and also enables any technician in the field to practice the present invention, including manufacturing and using any device or system, and implementing any combination method. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principle 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 within the scope of the claims.

Claims

1. A method for preparing a hygroscopic and antibacterial fabric, characterized in that: The method comprises the following preparation steps: The first step is to weigh the raw materials according to the mass proportions: 100 parts of polyester fiber, 80 parts of blended fiber, 8-10 parts of fabric modifier, 0.2-0.4 parts of initiator, and 2500-3000 parts of solvent; The second step is to prepare the fabric modifier, initiator and solvent to obtain a modified solution; Step 3: Add polyester fiber to the modified solution, continue stirring to react, then take out the polyester fiber, squeeze out excess impregnation solution, and dry to obtain modified polyester fiber; Step 4: Wash the modified polyester fiber with an ethanol solution, dry it and use it as the warp, and use the blended fiber as the weft. Weave the warp and weft to obtain a moisture-absorbing and antibacterial fabric. Wherein, the fabric modifier is prepared by the following steps: Step 1, pyrogallol and glacial acetic acid are mixed evenly and the system is heated to 70-90°C, then a glacial acetic acid solution of hexamethylenetetramine is added to the system, the reaction temperature is controlled to be 70-90°C for reaction, after the reaction is completed, the system is cooled to room temperature, and dilute hydrochloric acid is added to the system, and the reaction is continued at room temperature to obtain intermediate 1; Step 2, the intermediate 1, N-methylallylamine, lauric acid and deionized water are mixed evenly, and the reaction temperature is controlled to be 80°C for reaction. After the reaction is completed, pyridine is added to the system, and the reaction temperature is controlled to be 80°C for further reaction to obtain the intermediate 2; Step 3, the intermediate 2, butyl chloride and acetonitrile are mixed evenly, and the reaction temperature is controlled at 40-60° C. to react to obtain the fabric modifier; The initiator is one of benzoyl peroxide and azobisisobutyronitrile, the solvent is N,N-dimethylacetamide, the acetic acid solution of urotropine used in step 1 is prepared from 0.15 mol urotropine and 40 mL glacial acetic acid, the concentration of the dilute hydrochloric acid used is 4 mol / L, and the amount ratio of pyrogallol, glacial acetic acid, urotropine acetic acid solution, and dilute hydrochloric acid used in step 1 is 0.09-0.11 mol: 50-60 m L: 63g: 60-80mL, the amount ratio of intermediate 1, N-methylallylamine, lauric acid, deionized water and pyridine used in step 2 is 0.06mol: 0.06-0.07mol: 0.012-0.014mol: 80-100mL: 0.06mol, and the amount ratio of intermediate 2, butyl chloride and acetonitrile used in step 3 is 0.03mol: 0.06-0.08mol: 40-60mL.

2. The method for preparing a hygroscopic and antibacterial fabric according to claim 1, characterized in that: The blended fiber is one or a mixture of acrylic fiber, cotton fiber and spandex fiber.

3. The method for preparing a hygroscopic and antibacterial fabric according to claim 1, characterized in that: In the third step, the stirring speed condition is 150-250rpm, the stirring time condition is 40-60min, the rolling rate is 100%, and the drying condition is pre-baking at a temperature of 50°C for 10min and then baking at a temperature of 110°C for 10min.

4. The method for preparing a hygroscopic and antibacterial fabric according to claim 1, characterized in that: The ethanol solution used in the fourth step is an ethanol aqueous solution with a volume fraction of 75%, and the drying condition is to dry at a temperature of 50-60° C. to a constant weight.

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