阅读说明：本技术 一种抗流感病毒的织物及其制备方法 (Fabric for resisting influenza virus and preparation method thereof ) 是由 向红荣 于 2021-02-06 设计创作，主要内容包括：本发明公开了一种抗流感病毒的织物的制备方法,其特征在于,包括如下步骤：步骤S1、2,6-二氨基嘌呤/咪唑-4,5-二羧酸缩聚物的制备；步骤S2、离子化缩聚物；步骤S3、织物成型；步骤S4、离子交换。本发明还提供了一种根据所述抗流感病毒的织物的制备方法制备得到的抗流感病毒的织物。本发明公开的抗流感病毒的织物抗流感病毒效果显著,性能稳定性好,耐水洗性能、吸湿排汗效果、防水性和抗静电性能优异。(The invention discloses a preparation method of an anti-influenza virus fabric, which is characterized by comprising the following steps: step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate; step S2, ionizing the polycondensate; step S3, forming fabric; and step S4, ion exchange. The invention also provides an anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric. The fabric for resisting the influenza virus disclosed by the invention has the advantages of obvious effect on resisting the influenza virus, good performance stability, excellent water washing resistance, moisture absorption and sweat releasing effect, excellent waterproofness and excellent antistatic performance.)

1. A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at the normal pressure of 110-;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in the step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 40-60 ℃ for 4-6 hours, precipitating in water, washing the crude product with dichloromethane for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 10-20 hours, taking out, washing with water for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the finished anti-influenza virus fabric.

2. The method of claim 1, wherein the molar ratio of the 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid, catalyst, high boiling point solvent in step S1 is 1:1 (0.8-1.2) to (6-10).

3. The method for preparing an anti-influenza-virus fabric according to claim 1, wherein the catalyst is at least one of thiophosphonate, phosphorous acid and thiophosphoramide.

4. The method for preparing fabric resisting influenza viruses according to claim 1, wherein the high-boiling-point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.

5. The method for preparing an anti-influenza-virus fabric according to claim 1, wherein the inert gas is any one of nitrogen, helium, neon and argon.

6. The method of claim 1, wherein the mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate to dimethyl sulfoxide to N-chloromethylbenzothiazole-2-thione in step S2 is (3-5) (10-20) to (0.5-0.8).

7. The method for preparing an anti-influenza-virus fabric according to claim 1, wherein the melt spinning process in the step S3 is specifically as follows: the spinning temperature is 280-310 ℃, the spinning speed is 1500-2200m/min, the drawing temperature is 65-85 ℃, and the total drawing ratio is 2-4.

8. The method for preparing an anti-influenza-virus fabric according to claim 1, wherein the mass ratio of the sodium pyrophosphate to the tea polyphenol to the water in the mixed aqueous solution containing the sodium pyrophosphate and the tea polyphenol in step S4 is (8-12) to (3-110).

9. An anti-influenza virus fabric prepared according to the method for preparing an anti-influenza virus fabric of any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of functional textile products, in particular to an anti-influenza-virus fabric and a preparation method thereof.

Background

The textile, especially the textile tightly adhered to the skin, forms a microenvironment with sufficient nutrients and temperature and humidity suitable for the propagation of microorganisms under the combined action of the skin, the textile and sweat, so that a great amount of microorganisms are rapidly propagated to cause various diseases. In particular, influenza viruses, which are transmitted through air vectors, can have serious health effects once they enter the body, especially in the elderly, children and people with weak resistance. Therefore, the development of a fabric having a significant anti-influenza virus effect is a new direction of research in today's society.

The preparation method of the antibacterial anti-influenza virus fabric commonly used at present comprises the following steps: (1) the post-finishing technology comprises a coating method, a padding method, a microcapsule method, a grafting method and the like. The method is simple and easy to cook, but the problem of poor washing fastness is generally existed; (2) the fibril blending technology is that the anti-influenza virus agent is added into fiber-forming polymer, and the anti-influenza virus fiber is obtained after spinning, and then the anti-influenza virus fabric is prepared. In addition, the anti-influenza virus fabric on the market has the defects of more or less single function, poor moisture absorption and sweat releasing effects, further improved waterproofness, flame retardance and weather resistance, and further improved performance stability.

For example, chinese patent application CN 1609336a discloses an antiviral fiber and its manufacturing method and use, the raw material fiber provided by the invention can be natural fiber or chemical fiber, the raw material fiber is directly grafted with grafting solution to make grafted fiber matrix, then the anionic or cationic functional group and its corresponding cationic or anionic group are introduced. Forming the fiber with special structure and different chemical adsorption capacity and virus and bacteria adsorption capacity. The antiviral fiber can be processed into medical products, environment-friendly products or personal hygiene products and the like. However, the cationic antiviral fiber uses toxic and possibly carcinogenic chloromethyl ether in the preparation process, so that the cationic antiviral fiber has great harm to human bodies, and meanwhile, the hydrolysis product formaldehyde of the chloromethyl ether can also cause the problem of textile formaldehyde residue, so that the production, the application and the popularization are limited.

Therefore, the anti-influenza virus fabric with remarkable anti-influenza virus effect, good performance stability, excellent water washing resistance, moisture absorption and sweat release effect, water resistance and antistatic performance is developed, meets the market demand, has wide market value and application prospect, and has very important significance for promoting the development of the field of functional textiles.

Disclosure of Invention

The invention aims to solve the problems and provides the fabric for resisting the influenza viruses, which has the advantages of obvious effect on resisting the influenza viruses, good performance stability, washing resistance, moisture absorption and sweat releasing effect, water resistance and excellent antistatic property; meanwhile, the invention also provides a preparation method of the anti-influenza-virus fabric.

In order to achieve the above object, the present invention provides the following technical solution, a method for preparing an anti-influenza virus fabric, comprising the steps of:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at the normal pressure of 110-;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in the step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 40-60 ℃ for 4-6 hours, precipitating in water, washing the crude product with dichloromethane for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 10-20 hours, taking out, washing with water for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the finished anti-influenza virus fabric.

Preferably, the molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high boiling point solvent in step S1 is 1:1 (0.8-1.2): 6-10.

Preferably, the catalyst is at least one of thiophosphonate, phosphorous acid and thiophosphoryl amide; the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone; the inert gas is any one of nitrogen, helium, neon and argon.

Preferably, the mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 is (3-5): (10-20): (0.5-0.8).

Preferably, the melt spinning process in step S3 specifically includes: the spinning temperature is 280-310 ℃, the spinning speed is 1500-2200m/min, the drawing temperature is 65-85 ℃, and the total drawing ratio is 2-4.

Preferably, the mass ratio of the sodium pyrophosphate to the tea polyphenol to the water in the mixed aqueous solution containing the sodium pyrophosphate and the tea polyphenol in the step S4 is (8-12):3 (90-110).

The invention also aims to provide an anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

(1) the preparation method of the anti-influenza-virus fabric provided by the invention is simple in process, does not need special equipment, is convenient to operate, is high in preparation efficiency, and has higher popularization and application values.

(2) The fabric for resisting influenza viruses overcomes the defects that the anti-influenza virus fabric on the market has more or less single function, poor moisture absorption and sweat releasing effects, water resistance, flame resistance and weather resistance which need to be further improved, and performance stability which needs to be further improved; through the synergistic effect of the structures, the prepared anti-influenza virus fabric has the advantages of obvious anti-influenza virus effect, good performance stability, excellent water washing resistance, excellent moisture absorption and sweat releasing effect, excellent waterproofness and excellent antistatic performance.

(3) The fabric for resisting influenza viruses provided by the invention takes a 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate as a base material, and a purine, imidazole and amide structure is introduced into a molecular main chain to realize a synergistic effect, so that the prepared fabric has good mechanical properties, durability, water resistance and performance stability.

(4) According to the anti-influenza-virus fabric, a benzothiazole-2-thioketone and imidazole salt structure is introduced on a molecular chain through ionization, and a synergistic effect is achieved, so that the anti-influenza-virus fabric not only can effectively improve the anti-influenza-virus function, but also can play an antistatic role. Imidazolium salts on a molecular chain can be connected with sodium pyrophosphate and anionic groups on tea polyphenol through ionic bonds to form a three-dimensional network structure, so that the comprehensive performance of the fabric is effectively improved, and the water resistance of the fabric is excellent; the anti-influenza virus active ingredients in the fabric are connected to the molecular chain in a chemical bond mode, and phase separation caused by compatibility problems can not occur.

(5) According to the anti-influenza-virus fabric, in the preparation steps, the fabric is formed firstly, and then ion exchange is carried out, so that the defects that the fabric is insoluble, infusible and difficult to form due to the fact that a cross-linked structure is formed by exchange firstly are effectively overcome.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following provides a detailed description of the product of the present invention with reference to the examples.

Example 1

A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling-point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at the normal pressure of 110 ℃ for 4 hours, heating to 230 ℃, carrying out polycondensation reaction at 300Pa for 10 hours, cooling to room temperature, adjusting to the normal pressure, precipitating in water, washing the precipitated polycondensate with ethanol for 3 times, and drying in a vacuum drying oven at the temperature of 85 ℃ to constant weight to obtain the polycondensate of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in the step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 40 ℃ for 4 hours, precipitating in water, washing the crude product with dichloromethane for 3 times, and finally drying in a vacuum drying oven at 85 ℃ to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 10 hours, taking out, washing with water for 3 times, and finally drying in a vacuum drying oven at 85 ℃ to constant weight to obtain a finished anti-influenza virus fabric.

The molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high-boiling solvent in step S1 is 1:1:0.8: 6; the catalyst is thiophosphonate; the high boiling point solvent is dimethyl sulfoxide; the inert gas is nitrogen.

The mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 was 3:10: 0.5.

The melt spinning process in the step S3 specifically includes: the spinning temperature is 280 ℃, the spinning speed is 1500m/min, the drawing temperature is 65 ℃, and the total drawing ratio is 2.

In the step S4, the mass ratio of the sodium pyrophosphate to the tea polyphenol to the water in the mixed water solution containing the sodium pyrophosphate and the tea polyphenol is 8:3: 90.

An anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Example 2

A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at 112 ℃ under normal pressure for 4.5 hours, heating to 235 ℃, performing polycondensation reaction at 350Pa for 11 hours, cooling to room temperature, adjusting to normal pressure, precipitating in water, washing the precipitated polycondensate for 4 times with ethanol, and drying in a vacuum drying oven at 87 ℃ to constant weight to obtain the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 45 ℃ for 4.5 hours, precipitating in water, washing the crude product with dichloromethane for 4 times, and finally drying at 87 ℃ in a vacuum drying oven to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 13 hours, taking out, washing with water for 4 times, and finally drying in a vacuum drying oven at 87 ℃ to constant weight to obtain a finished anti-influenza virus fabric.

The molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high-boiling solvent in step S1 is 1:1:0.9: 7; the catalyst is phosphorous acid; the high boiling point solvent is N, N-dimethylformamide; the inert gas is helium.

The mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 was 3.5:13: 0.6.

The melt spinning process in the step S3 specifically includes: the spinning temperature is 290 ℃, the spinning speed is 1700m/min, the drawing temperature is 69 ℃, and the total drawing ratio is 2.5.

In the step S4, the mass ratio of the sodium pyrophosphate to the tea polyphenol to the water in the mixed water solution containing the sodium pyrophosphate and the tea polyphenol is 9:3: 95.

An anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Example 3

A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at 115 ℃ under normal pressure for 5 hours, heating to 240 ℃, carrying out polycondensation reaction under 400Pa for 13 hours, cooling to room temperature, adjusting to normal pressure, precipitating in water, washing the precipitated polycondensate with ethanol for 5 times, and drying in a vacuum drying oven at 90 ℃ to constant weight to obtain a 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring at 50 ℃ for reaction for 5 hours, precipitating in water, washing the crude product with dichloromethane for 5 times, and finally drying at 90 ℃ in a vacuum drying oven to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 15 hours, taking out, washing with water for 5 times, and finally drying in a vacuum drying oven at 90 ℃ to constant weight to obtain a finished anti-influenza virus fabric.

The molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high-boiling solvent in the step S1 is 1:1:1: 8; the catalyst is thiophosphoryl amide; the high boiling point solvent is N, N-dimethylacetamide; the inert gas is neon.

The mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 was 4:15: 0.65.

The melt spinning process in the step S3 specifically includes: the spinning temperature is 295 ℃, the spinning speed is 1800m/min, the drawing temperature is 75 ℃, and the total drawing ratio is 3.

In the step S4, the mass ratio of the sodium pyrophosphate to the tea polyphenol to the water in the mixed water solution containing the sodium pyrophosphate and the tea polyphenol is 10:3: 98.

An anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Example 4

A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at 118 ℃ under normal pressure for 5.5 hours, heating to 248 ℃, carrying out polycondensation reaction at 480Pa for 14 hours, cooling to room temperature, adjusting to normal pressure, precipitating in water, washing the precipitated polycondensate for 6 times with ethanol, and drying in a vacuum drying oven at 93 ℃ to constant weight to obtain the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in the step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 55 ℃ for 5.8 hours, precipitating in water, washing the crude product with dichloromethane for 6 times, and finally drying at 93 ℃ in a vacuum drying oven to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 18 hours, taking out, washing with water for 6 times, and finally drying in a vacuum drying oven at 93 ℃ to constant weight to obtain a finished anti-influenza virus fabric.

The molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high-boiling solvent in step S1 is 1:1:1.1: 9.5; the catalyst is formed by mixing thiophosphonate, phosphorous acid and thiophosphoryl amide according to the mass ratio of 1:3: 5; the high-boiling-point solvent is formed by mixing dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone according to a mass ratio of 1:1:3: 2; the inert gas is argon.

The mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 was 4.7:18: 0.75.

The melt spinning process in the step S3 specifically includes: the spinning temperature was 305 ℃, the spinning speed was 2100m/min, the drawing temperature was 83 ℃, and the total draw ratio was 3.5.

In the step S4, the mass ratio of sodium pyrophosphate to tea polyphenol to water in the mixed aqueous solution containing sodium pyrophosphate and tea polyphenol is 11:3: 105.

An anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Example 5

A preparation method of an anti-influenza virus fabric is characterized by comprising the following steps:

step S1, preparation of 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate: dissolving 2, 6-diaminopurine, imidazole-4, 5-dicarboxylic acid and a catalyst in a high-boiling point solvent to form a solution, adding the solution into a reaction kettle, replacing the air in the kettle with inert gas, reacting at 120 ℃ under normal pressure for 6 hours, heating to 250 ℃, carrying out polycondensation reaction at 500Pa for 15 hours, cooling to room temperature, adjusting to normal pressure, precipitating in water, washing the precipitated polycondensate for 6 times with ethanol, and drying in a vacuum drying oven at 95 ℃ to constant weight to obtain a 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate;

step S2, ionizing the polycondensate: dissolving the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate prepared in the step S1 in dimethyl sulfoxide, adding N-chloromethylbenzothiazole-2-thione, stirring and reacting at 60 ℃ for 6 hours, precipitating in water, washing the crude product with dichloromethane for 6 times, and finally drying at 95 ℃ in a vacuum drying oven to constant weight to obtain an ionized polycondensate;

step S3, fabric forming: adding the ionized polycondensate prepared in the step S2 into a double-screw extruder for extrusion, and then performing melt spinning to prepare functional fibers; weaving the functional fibers by a circular knitting machine to obtain grey cloth; then pre-shaping, softening and dehydrating the grey cloth, and drying to obtain an anti-influenza virus fabric primary product;

step S4, ion exchange: and (3) soaking the primary anti-influenza virus fabric prepared in the step (S3) in a mixed aqueous solution containing sodium pyrophosphate and tea polyphenol for 20 hours, taking out, washing with water for 6 times, and finally drying in a vacuum drying oven at 95 ℃ to constant weight to obtain a finished anti-influenza virus fabric.

The molar ratio of the 2, 6-diaminopurine, the imidazole-4, 5-dicarboxylic acid, the catalyst and the high-boiling solvent in step S1 is 1:1:1.2: 10; the catalyst is thiophosphonate; the high boiling point solvent is N-methyl pyrrolidone; the inert gas is nitrogen.

The mass ratio of the 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate, dimethyl sulfoxide and N-chloromethylbenzothiazole-2-thione in step S2 was 5:20: 0.8.

The melt spinning process in the step S3 specifically includes: the spinning temperature is 310 ℃, the spinning speed is 2200m/min, the drawing temperature is 85 ℃, and the total drawing ratio is 4.

In the step S4, the mass ratio of sodium pyrophosphate to tea polyphenol to water in the mixed aqueous solution containing sodium pyrophosphate and tea polyphenol is 12:3: 110.

An anti-influenza virus fabric prepared according to the preparation method of the anti-influenza virus fabric.

Comparative example 1

An anti-influenza virus fabric having a formulation and a preparation method substantially the same as those of example 1 except that no step S4, ion exchange, was performed.

Comparative example 2

An anti-influenza virus fabric having substantially the same formulation and preparation as in example 1, except that in the step S3, a 2, 6-diaminopurine/imidazole-4, 5-dicarboxylic acid polycondensate is used in place of the ionized polycondensate in the fabric formation.

In order to further illustrate the beneficial technical effects of the anti-influenza virus fabric according to the embodiment of the present invention, the national standard GB/T20944.3-2008, section 3 of evaluation of antibacterial properties of textiles, is adopted: quantitative antibacterial property test IS carried out according to the oscillation method, and the antibacterial property test IS carried out according to IS 018184: 2014 antiviral textile test standard for performing antiviral performance test, and measuring by antiviral rate; the performance stability was measured as the anti-H1N 1 virus rate after 30 water washes.

TABLE 1

As can be seen from table 1, the fabric for resisting influenza viruses disclosed in the embodiments of the present invention has more excellent antibacterial performance and antiviral performance, and the stability of the water washing resistance is better, which is a result of the synergistic effect of the raw materials.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention can be readily implemented by those of ordinary skill in the art in view of the foregoing description; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.