Waterproof moisture-permeable lyocell blended fabric and preparation method thereof

Abstract

The invention relates to a waterproof moisture-permeable lyocell blended fabric and a preparation method thereof, and belongs to the technical field of fabrics. The preparation method of the waterproof and moisture-permeable lyocell blended fabric comprises the following steps: putting a lyocell blended fabric into a treating fluid, carrying out heating treatment, plasma treatment and filtration, then washing, carrying out vacuum drying, adding absolute ethyl alcohol, uniformly mixing, then adding an organic fluorine monomer, carrying out ultrasonic treatment, heating and preheating, then adding a cross-linking monomer, heating and stirring, and carrying out drying to obtain the waterproof and moisture-permeable lyocell blended fabric. And cooling to room temperature, filtering, washing, drying in vacuum, adding into a zinc salt aqueous solution, ultrasonically mixing, stirring, standing, filtering, washing, and drying in vacuum, thereby obtaining the product. The prepared blended fabric achieves a good waterproof effect, and meanwhile the original air permeability, moisture penetrability and comfort of the lyocell fibers are kept; the antibacterial performance of the blended fabric mainly comes from the addition of organic / inorganic compounded antibacterial agents, and the antibacterial agents can effectively inhibit the growth and reproduction of bacteria, so that the service life of the fabric is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics and relates to a waterproof and breathable lyocell blended fabric and a preparation method thereof. Background Art

[0002] Lyocell fiber, also affectionately known as "Tencel", is a new type of regenerated cellulose fiber made from natural plant fiber. This fiber can be industrialized on a large scale, bringing a new fabric option to the textile industry. Lyocell fiber not only has the excellent properties of natural fibers, but also combines the advantages of synthetic fibers. It has strong dry and wet strength, making the Lyocell fabric woven with it outstanding in terms of comfort. The raw material resources of this fabric are renewable, the production process is low-carbon and environmentally friendly, and there is no emission of toxic substances. In addition, the product can be completely degraded after use, which is environmentally friendly.

[0003] Lyocell is highly breathable, making it comfortable even in hot weather. It also has excellent dyeability, can be easily dyed into a variety of colors, and has a soft hand feel. In terms of washing, Lyocell performs well, with good anti-pilling properties and very low shrinkage, making it more durable in daily use.

[0004] Lyocell fabrics are widely used, from industrial fabrics to outerwear for clothing products, to home textiles, especially high-end women's clothing. As people's living standards continue to improve, the demand for fabrics is also increasing. Modern consumers not only require fabrics to be waterproof, but also hope that the fabrics can have good breathability while ensuring waterproofness. In addition, corrosion resistance and mechanical properties also need to be improved to meet a wider range of application needs. However, like other synthetic fibers, Lyocell fabrics have a significant disadvantage: they are prone to breeding bacteria. This feature greatly limits the application of Lyocell fabrics. Summary of the invention

[0005] The purpose of the present invention is to provide a waterproof and breathable lyocell blended fabric and a preparation method thereof. The blended fabric prepared by the present invention has excellent antibacterial and waterproof properties; the fabric achieves a good waterproof effect through the blending and post-finishing process of the lyocell fabric and other fabrics, while maintaining the original air permeability, moisture permeability and comfort of the lyocell fiber; the antibacterial property of the blended fabric mainly comes from the addition of organic / inorganic compound antibacterial agents, which can effectively inhibit the growth and reproduction of bacteria, thereby extending the service life of the fabric.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing a waterproof and breathable lyocell blended fabric comprises the following steps:

[0008] S1, placing the lyocell blended fabric in a treatment solution for heating treatment, plasma treatment, filtering, washing, and vacuum drying in a drying oven to constant weight to obtain a prefabricated fabric;

[0009] S2, after mixing the prefabricated fabric and anhydrous ethanol, adding an organic fluorine monomer for ultrasonic treatment, preheating and adding a cross-linking monomer, heating and stirring, cooling to room temperature, filtering, washing, and vacuum drying in a drying oven to constant weight to obtain a primary fabric;

[0010] S3. Add the pre-prepared fabric into the zinc salt aqueous solution, mix with ultrasound, stir, let stand, filter, wash, place in a drying oven, and vacuum dry to constant weight to obtain the fabric.

[0011] As a preferred technical solution of the present invention, in step S1, the lyocell blended fabric is formed by blending lyocell fabric and other fabrics in a mass ratio of 3:1; the other fabrics are one or two of polyester fabric and pure cotton fabric.

[0012] As a preferred technical solution of the present invention, in step S1, the heating treatment is heating at a temperature of 80-90°C for 20-30 minutes; the plasma treatment is processing at a power of 1.8-2.0kW for 120-150 seconds; and the vacuum drying temperature is 80°C.

[0013] As a preferred technical solution of the present invention, in step S1, the usage ratio of the lyocell blended fabric and the treatment liquid is 1.2-1.5g:30-35mL; the treatment liquid is mixed by isobutanol, acetic acid and deionized water in a mass ratio of 4.0-4.2:0.3-0.4:10-11.

[0014] As a preferred technical solution of the present invention, when the lyocell blended fabric and the treatment liquid are placed under high temperature conditions, the interior of the fabric will swell and become soft, which promotes the removal of impurities in the fabric, and the plasma treatment can improve the reaction efficiency of acetic acid and help remove other impurities in lignin; at the same time, isobutanol combined with plasma treatment can effectively increase the number of hydroxyl groups on the surface of the fabric.

[0015] As a preferred technical solution of the present invention, in step S2, the ultrasonic treatment is ultrasonic treatment at a power of 150-200W for 6-10min; the preheating temperature is 50°C; the heating and stirring is stirring at a temperature of 60-70°C for 5-6h; and the vacuum drying temperature is 80°C.

[0016] As a preferred technical solution of the present invention, in step S2, the mass ratio of the prefabricated fabric, anhydrous ethanol, organic fluorine monomer and cross-linking monomer is 20-23:70-80:2.5-2.8:1.6-1.8; the organic fluorine monomer is 2-amino-4-fluorobenzenethiol; and the cross-linking monomer is a cardanol derivative.

[0017] As a preferred technical solution of the present invention, in step S3, the ultrasonic mixing is performed at a power of 80-100 W for 10-12 min; the stirring is performed at a speed of 300-400 r / min for 2-3 h; the standing time is 2 h; and the vacuum drying temperature is 75°C.

[0018] As a preferred technical solution of the present invention, in step S3, the mass ratio of the primary fabric to the zinc salt aqueous solution is 5-6:45; the zinc salt aqueous solution is formed by mixing zinc nitrate and deionized water in a mass ratio of 3:500.

[0019] The invention discloses a preparation method of the cardanol derivative, comprising the steps of: mixing cardanol, 3,4-dihydroxycinnamaldehyde and anhydrous ethanol, adding initiator AIBN, heating and stirring at 64-72°C for 6-7h, and centrifuging to remove the supernatant to obtain the cardanol derivative.

[0020] As a preferred technical solution of the present invention, the mass ratio of the cardanol, 3,4-dihydroxycinnamaldehyde, anhydrous ethanol and initiator AIBN is 1.6-1.8:2.1-2.5:15-18:0.07-0.08.

[0021] The invention discloses a waterproof and breathable lyocell blended fabric prepared by the preparation method.

[0022] Beneficial effects of the present invention:

[0023] The blended fabric prepared by the present invention has excellent antibacterial and waterproof properties; the fabric achieves good waterproof effect through the blending and post-finishing process of lyocell fabric and other fabrics, while maintaining the original air permeability, moisture permeability and comfort of lyocell fiber; the antibacterial property of the blended fabric mainly comes from the addition of organic / inorganic compound antibacterial agents, which can effectively inhibit the growth and reproduction of bacteria, thereby extending the service life of the fabric. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0025] Example 1

[0026] A method for preparing a waterproof and breathable lyocell blended fabric comprises the following steps:

[0027] S1. Placing a lyocell blended fabric in a treatment solution and heating it at 80°C for 30 minutes, subjecting it to a plasma treatment at 1.8kW for 150 seconds, filtering it and washing it, and vacuum drying it in a drying oven at 80°C to a constant weight to obtain a prefabricated fabric; the amount ratio of the lyocell blended fabric to the treatment solution is 1.2g:30mL; the treatment solution is prepared by mixing isobutanol, acetic acid and deionized water in a mass ratio of 4.0:0.3:10; the lyocell blended fabric is prepared by blending lyocell fabric and polyester fabric in a mass ratio of 3:1;

[0028] S2. After mixing the prefabricated fabric and anhydrous ethanol, add the organic fluorine monomer and perform ultrasound at a power of 150 W for 10 minutes, preheat the temperature to 50°C, add the cross-linking monomer and stir at 60°C for 6 hours, cool to room temperature, filter, wash, and vacuum dry in a drying oven at 80°C to constant weight to obtain the primary fabric; the mass ratio of the prefabricated fabric, anhydrous ethanol, organic fluorine monomer and cross-linking monomer is 20:70:2.5:1.6;

[0029] S3, adding the pre-made fabric to the zinc salt aqueous solution, ultrasonically treating at 80W power for 12 minutes, stirring at 300r / min speed for 3 hours, standing for 2 hours, filtering, washing, placing in a drying oven, and vacuum drying at 75°C to constant weight, to obtain; wherein the mass ratio of the pre-made fabric to the zinc salt aqueous solution is 5:45; the zinc salt aqueous solution is prepared by mixing zinc nitrate and deionized water at a mass ratio of 3:500;

[0030] In step S2, the organic fluorine monomer is 2-amino-4-fluorobenzenethiol; the cross-linking monomer is a cardanol derivative; wherein the preparation of the cardanol derivative comprises mixing cardanol, 3,4-dihydroxycinnamaldehyde and anhydrous ethanol, adding initiator AIBN, heating and stirring at 64°C for 7 hours, and centrifuging to remove the supernatant to obtain the cardanol derivative; wherein the mass ratio of the cardanol, 3,4-dihydroxycinnamaldehyde, anhydrous ethanol and initiator AIBN is 1.6:2.1:15:0.07.

[0031] Example 2

[0032] A method for preparing a waterproof and breathable lyocell blended fabric comprises the following steps:

[0033] S1. Placing a lyocell blended fabric in a treatment solution and heating it at 85°C for 25 minutes, subjecting it to a plasma treatment at 1.9kW for 135 seconds, filtering it and washing it, and vacuum drying it in a drying oven at 80°C to a constant weight to obtain a prefabricated fabric; the amount ratio of the lyocell blended fabric to the treatment solution is 1.4g:32mL; the treatment solution is prepared by mixing isobutanol, acetic acid and deionized water in a mass ratio of 4.1:0.35:10.5; the lyocell blended fabric is prepared by blending lyocell fabric and polyester fabric in a mass ratio of 3:1;

[0034] S2. After mixing the prefabricated fabric and anhydrous ethanol, add the organic fluorine monomer and perform ultrasonic treatment at 175W power for 8 minutes, preheat the temperature to 50°C, add the cross-linking monomer and stir at 65°C for 5.5 hours, cool to room temperature, filter, wash, and vacuum dry in a drying oven at 80°C to constant weight to obtain the primary fabric; the mass ratio of the prefabricated fabric, anhydrous ethanol, organic fluorine monomer and cross-linking monomer is 22:75:2.6:1.7;

[0035] S3, adding the pre-made fabric to the zinc salt aqueous solution, ultrasonically treating at 90W power for 11 minutes, stirring at 350r / min speed for 2.5 hours, standing for 2 hours, filtering, washing, placing in a drying oven, and vacuum drying at 75°C to constant weight to obtain; wherein the mass ratio of the pre-made fabric to the zinc salt aqueous solution is 5.5:45; the zinc salt aqueous solution is prepared by mixing zinc nitrate and deionized water at a mass ratio of 3:500;

[0036] In step S2, the organic fluorine monomer is 2-amino-4-fluorobenzenethiol; the cross-linking monomer is a cardanol derivative; wherein the preparation of the cardanol derivative comprises mixing cardanol, 3,4-dihydroxycinnamaldehyde and anhydrous ethanol, adding initiator AIBN, heating and stirring at 68°C for 6.5h, and centrifuging to remove the supernatant to obtain the cardanol derivative; wherein the mass ratio of the cardanol, 3,4-dihydroxycinnamaldehyde, anhydrous ethanol and initiator AIBN is 1.7:2.3:16:0.075.

[0037] Example 3

[0038] A method for preparing a waterproof and breathable lyocell blended fabric comprises the following steps:

[0039] S1. Placing a lyocell blended fabric in a treatment solution and heating it at 90° C. for 20 min, subjecting it to a plasma treatment at 2.0 kW for 120 s, filtering it, washing it, and vacuum drying it in a drying oven at 80° C. to a constant weight to obtain a prefabricated fabric; the amount ratio of the lyocell blended fabric to the treatment solution is 1.5 g:35 mL; the treatment solution is prepared by mixing isobutanol, acetic acid and deionized water in a mass ratio of 4.2:0.4:11; the lyocell blended fabric is prepared by blending lyocell fabric and polyester fabric in a mass ratio of 3:1;

[0040] S2. After mixing the prefabricated fabric and anhydrous ethanol, add the organic fluorine monomer and perform ultrasonic treatment at a power of 200 W for 6 minutes, preheat the temperature to 50°C, add the cross-linking monomer and stir at 70°C for 5 hours, cool to room temperature, filter, wash, and vacuum dry in a drying oven at 80°C to constant weight to obtain the primary fabric; the mass ratio of the prefabricated fabric, anhydrous ethanol, organic fluorine monomer and cross-linking monomer is 23:80:2.8:1.8;

[0041] S3, adding the pre-made fabric to the zinc salt aqueous solution, ultrasonically treating at 100W power for 10 minutes, stirring at 400r / min speed for 2 hours, filtering and washing after standing for 2 hours, placing in a drying oven, and vacuum drying at 75°C to constant weight, to obtain; wherein the mass ratio of the pre-made fabric to the zinc salt aqueous solution is 6:45; the zinc salt aqueous solution is prepared by mixing zinc nitrate and deionized water at a mass ratio of 3:500;

[0042] In step S2, the organic fluorine monomer is 2-amino-4-fluorobenzenethiol; the cross-linking monomer is a cardanol derivative; wherein the preparation of the cardanol derivative comprises mixing cardanol, 3,4-dihydroxycinnamaldehyde and anhydrous ethanol, adding initiator AIBN, heating and stirring at 72°C for 6 hours, and centrifuging to remove the supernatant to obtain the cardanol derivative; wherein the mass ratio of the cardanol, 3,4-dihydroxycinnamaldehyde, anhydrous ethanol and initiator AIBN is 1.8:2.5:18:0.08.

[0043] Comparative Example 1

[0044] Compared with Example 3, the difference in Comparative Example 1 is that step S1 is not performed, and lyocell blended fabric is used instead of the prefabricated fabric in step S2, and the other components, preparation steps and parameters are the same.

[0045] Comparative Example 2

[0046] Compared with Example 3, the difference in Comparative Example 2 is that o-aminothiophenol replaces the organic fluorine monomer, and the other components, preparation steps and parameters are the same.

[0047] Comparative Example 3

[0048] Compared with Example 3, the difference in Comparative Example 3 is that cardanol is used instead of the cardanol derivative, and the other components, preparation steps and parameters are the same.

[0049] Comparative Example 4

[0050] Compared with Example 3, Comparative Example 4 is different in that 3,4-dihydroxycinnamaldehyde replaces the cardanol derivative, and the other components, preparation steps and parameters are the same.

[0051] Comparative Example 5

[0052] Compared with Example 3, Comparative Example 5 is different in that no organic fluorine monomer is used, and the remaining components, preparation steps and parameters are the same.

[0053] Comparative Example 6

[0054] Compared with Example 3, Comparative Example 6 is different in that deionized water replaces the zinc salt aqueous solution, and the other components, preparation steps and parameters are the same.

[0055] The fabrics prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to the following performance tests, respectively, and the test results are shown in Table 1.

[0056] Hydrophobic performance test: The contact angle is measured using a contact angle meter at room temperature using a 4 μl constant water droplet. The final contact angle value is obtained by calculating the average of five measurements of different areas of the sample.

[0057] Antibacterial performance test: According to GB / T20944.3-2008, the tested bacteria is Escherichia coli;

[0058] Table 1

[0059] Contact angle (°) Antibacterial rate (%) Example 1 137 98.9 Example 2 139 99.1 Example 3 140 99.2 Comparative Example 1 103 73.8 Comparative Example 2 112 81.7 Comparative Example 3 105 71.9 Comparative Example 4 114 84.5 Comparative Example 5 94 65.7 Comparative Example 6 109 72.5

[0060] From the test results in Table 1, it can be seen that compared with Comparative Examples 1-6, the blended fabrics prepared in Examples 1-3 of the present invention have excellent antibacterial ability against Escherichia coli and hydrophobic ability, that is, have significant antibacterial and waterproof properties.

[0061] Through comparative analysis, it can be seen that this is because the present invention removes impurities in the fabric and effectively increases the number of hydroxyl groups on the surface of the fabric by compounding under isobutyl alcohol and acetic acid environment through high temperature and plasma treatment, which is beneficial to the modification of the organic components in the later stage. The introduction of fluorine element can form a fluorinated layer with low surface energy on the surface of the fabric fiber, making the surface of the blended fabric super-hydrophobic, and this super-hydrophobic property can effectively reduce the effective contact area between bacteria and the fabric surface, thereby reducing the adhesion and reproduction opportunities of bacteria; the cardanol derivatives formed by the dihydroxycinnamaldehyde modified cardanol Biological materials contain long carbon chains, benzene ring structures and o-diphenol structures with strong hydrophobicity, which can effectively improve the hydrophobicity and antibacterial properties of fabrics. The aldehyde group of cardanol derivatives can form a covalent bond with the amino group of organic fluorine monomers to form a stable Schiff base structure and organically modify the surface of the fabric to form a porous microporous structure. When immersed in a zinc salt aqueous solution, its zinc metal ions can undergo a strong chelating effect with groups such as catechol, amino, hydroxyl, thiol, and Schiff base structures, which can further improve the mechanical properties of blended fabrics and give them better hydrophobic and antibacterial properties.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any indirect modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a waterproof and breathable lyocell blended fabric, characterized in that: The preparation method comprises the following steps: S1, placing the lyocell blended fabric in a treatment solution for heating treatment, plasma treatment, filtering, washing, and vacuum drying in a drying oven to constant weight to obtain a prefabricated fabric; S2, after mixing the prefabricated fabric and anhydrous ethanol, adding an organic fluorine monomer for ultrasonic treatment, preheating and adding a cross-linking monomer, heating and stirring, cooling to room temperature, filtering, washing, and vacuum drying in a drying oven to constant weight to obtain a primary fabric; S3. Add the pre-prepared fabric into the zinc salt aqueous solution, mix with ultrasound, stir, let stand, filter, wash, place in a drying oven, and vacuum dry to constant weight to obtain the fabric.

2. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S1, the lyocell blended fabric is formed by blending lyocell fabric and other fabrics in a mass ratio of 3:1; the other fabrics are one or two of polyester fabric and pure cotton fabric.

3. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S1, the heating treatment is heating at a temperature of 80-90°C for 20-30 minutes; the plasma treatment is treating at a power of 1.8-2.0kW for 120-150 seconds; and the vacuum drying temperature is 80°C.

4. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S1, the usage ratio of the lyocell blended fabric and the treatment liquid is 1.2-1.5 g: 30-35 mL; the treatment liquid is prepared by mixing isobutyl alcohol, acetic acid and deionized water in a mass ratio of 4.0-4.2: 0.3-0.4: 10-11.

5. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S2, the ultrasonic treatment is performed at a power of 150-200 W for 6-10 min; the preheating temperature is 50° C.; the heating stirring is performed at a temperature of 60-70° C. for 5-6 h; and the vacuum drying temperature is 80° C.

6. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S2, the mass ratio of the prefabricated fabric, anhydrous ethanol, organic fluorine monomer and cross-linking monomer is 20-23:70-80:2.5-2.8:1.6-1.8; the organic fluorine monomer is 2-amino-4-fluorobenzenethiol; the cross-linking monomer is a cardanol derivative; the preparation of the cardanol derivative comprises mixing cardanol, 3,4-dihydroxycinnamaldehyde and anhydrous ethanol, adding initiator AIBN, heating and stirring at 64-72°C for 6-7h, and centrifuging to remove the supernatant.

7. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 6, characterized in that: The mass ratio of the cardanol, 3,4-dihydroxycinnamaldehyde, anhydrous ethanol and initiator AIBN is 1.6-1.8: 2.1-2.5: 15-18: 0.07-0.

08.

8. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S3, the ultrasonic mixing is performed at a power of 80-100 W for 10-12 min; the stirring is performed at a speed of 300-400 r / min for 2-3 h; the standing time is 2 h; and the vacuum drying temperature is 75°C.

9. The method for preparing a waterproof and breathable lyocell blended fabric according to claim 1, characterized in that: In step S3, the mass ratio of the primary fabric to the zinc salt aqueous solution is 5-6:45; the zinc salt aqueous solution is prepared by mixing zinc nitrate and deionized water in a mass ratio of 3:

500.

10. A waterproof and breathable lyocell blended fabric prepared by the preparation method according to any one of claims 1 to 9.