Odor-removing textile fabric and production process thereof

Abstract

The invention discloses a peculiar smell removing textile fabric and a production process thereof, and belongs to the technical field of textile fabric preparation, and the production process comprises the following steps: step S1, placing a textile fabric washed with acetone and dried in a sodium hydroxide solution with the concentration of 2 wt%, dipping at 90-95 DEG C for 0.5-1 h, washing with deionized water, and drying to obtain a pretreated fabric; s2, adding the pretreated fabric into the modified finishing liquid, standing for 1 min, taking out, drying at 100-110 DEG C, baking at 160-170 DEG C for 4-5 min, and cooling to obtain the odor-removing textile fabric. The hydroxyl activity of the surface of the textile fabric is effectively improved through alkali treatment, the intermolecular force between the modified deodorant and the textile fabric is enhanced, and meanwhile, the modified deodorant can improve the peculiar smell elimination performance of the textile fabric and can also improve the antibacterial performance of the textile fabric.

Description

Technical Field

[0001] The invention belongs to the technical field of textile fabric preparation, and in particular relates to an odor-removing textile fabric and a production process thereof. Background Art

[0002] With the improvement of people's living standards and the enhancement of health awareness, the requirements for textiles are no longer limited to the basic function of keeping warm. Antibacterial and deodorizing functional fabrics that are conducive to physical and mental comfort and health are booming. Among many functional textiles, deodorizing textile fabrics have received widespread attention because they can effectively improve the wearing experience and reduce the discomfort caused by odor.

[0003] In the prior art, tea polyphenols are usually added when preparing textile fabrics. Tea polyphenols, as the main bioactive compound in tea, is a natural polyphenol compound containing multiple active hydroxyl groups and has good deodorizing properties. However, tea polyphenols are easily oxidized by oxygen in air or water to form o-quinone, thereby reducing the application of tea polyphenols in the antibacterial and deodorizing properties of textile fabrics. Therefore, how to effectively prevent tea polyphenols from being oxidized by air without affecting the deodorizing properties of tea polyphenols on textile fabrics is a technical problem that needs to be solved at present. Summary of the invention

[0004] The object of the present invention is to provide a deodorizing textile fabric and a production process thereof to solve the problems in the background technology.

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

[0006] A production process for deodorizing textile fabrics comprises the following steps:

[0007] Step S1: Pretreatment of textile fabrics

[0008] The textile fabric washed with acetone and dried is placed in a sodium hydroxide solution, immersed at 90-95° C. for 0.5-1 h, and then washed with deionized water and dried to obtain a pretreated fabric; the textile fabric may be any one of cotton fabric, linen fabric or bamboo fiber fabric, and the alkali treatment can effectively increase the hydroxyl activity on the surface of the textile fabric;

[0009] Step S2: Preparation of odor-removing textile fabric

[0010] The pretreated fabric is added to the modified finishing liquid, and after standing for 1 minute, the fabric is taken out, the water is dried at 100-110° C., and then baked at 160-170° C. for 4-5 minutes. After cooling, the deodorized textile fabric is obtained.

[0011] Furthermore, the usage ratio of the textile fabric and the sodium hydroxide solution is 10-15 g:90 mL; and the concentration of the sodium hydroxide solution is 2 wt %.

[0012] Furthermore, the usage ratio of the pretreated fabric to the modified finishing liquid is 10-15 g:100 mL.

[0013] Furthermore, the modified finishing liquid is prepared by the following steps:

[0014] Sodium hypophosphite is added to deionized water, stirred to dissolve, a modified deodorant is added, mixed evenly, and then butane tetraacetic acid is added, stirred to mix, to obtain a modified finishing liquid; butane tetraacetic acid is used as a connector and sodium hypophosphite is used as a catalyst to cause an esterification reaction between the modified deodorant and the fibers of the pretreated fabric, thereby grafting the modified deodorant onto the textile fabric.

[0015] Furthermore, the usage ratio of the deionized water, sodium hypophosphite, modified deodorant and butane tetraacetic acid is 100 mL: 0.5-1 g: 8-16 g: 2-5 g.

[0016] Further, the modified deodorant is prepared by the following steps:

[0017] A1. Add chitosan to an acetic acid solution with a concentration of 1wt%, stir to dissolve, filter through a 0.45μm microporous membrane, add a sodium hydroxide solution with a concentration of 5wt% to adjust the pH value to 3.2-6.4, add a sodium tripolyphosphate aqueous solution, stir and mix, dropwise add a tea polyphenol aqueous solution, control the dropwise addition time to 3min, and stir and react at 20-30°C for 40-50min, then centrifuge, wash, and dry to obtain a modified inclusion compound; use acetic acid as a solvent and sodium tripolyphosphate as a cross-linking agent, adopt an ionic cross-linking method, and effectively coat tea polyphenols inside the nanoparticles formed by chitosan through hydrogen bonds;

[0018] A2. Add polyhexamethylene guanidine to a 51wt% glacial acetic acid solution, stir to dissolve, add the modified inclusion compound, stir to mix, add ammonium cerium nitrate in a nitrogen atmosphere and mix evenly, then add dilute nitric acid with a concentration of 10wt% to adjust the pH value to 5-6, continue stirring to react for 3-4h, then add excess acetone to precipitate, finally extract with anhydrous ethanol, dry and grind to obtain a modified deodorant; using glacial acetic acid as solvent and ammonium cerium nitrate as initiator, combining the amino group on the surface of the modified inclusion compound with the guanidine group of the polyhexamethylene guanidine molecule under acidic conditions to obtain a modified deodorant with polyhexamethylene guanidine grafted on the surface.

[0019] Furthermore, the dosage ratio of the acetic acid solution, chitosan, sodium tripolyphosphate aqueous solution and tea polyphenol aqueous solution is 100mL:18-23g:6mL:2.4mL; and the deacetylation degree of the chitosan is 90%.

[0020] Furthermore, the concentration of the sodium tripolyphosphate aqueous solution is 2-6 mg / mL; the concentration of the tea polyphenol aqueous solution is 12-20 mg / mL.

[0021] Furthermore, the usage ratio of the glacial acetic acid solution, polyhexamethylene guanidine, modified inclusion compound and ammonium cerium nitrate is 100 mL: 8-13 g: 6-15 g: 0.02-0.2 g.

[0022] A deodorizing textile fabric is produced by the above production process.

[0023] Beneficial effects of the present invention:

[0024] The modified deodorant molecule of the present invention is grafted with polyhexamethylene guanidine. Under the catalytic action of linker butane tetraacetic acid and sodium hypophosphite, the modified deodorant is firmly grafted on the surface of the textile fabric through an esterification reaction, thereby enhancing the interface bonding force between the modified deodorant and the textile fabric. In addition, the modified deodorant molecule also contains a modified inclusion compound, in which tea polyphenols are effectively coated inside the nanoparticles formed by chitosan. On the one hand, the oxidation of tea polyphenols can be effectively inhibited, thereby improving the odor elimination performance of the modified deodorant. On the other hand, the chitosan on the surface of the modified inclusion compound can adsorb odorous gases containing -SH, -NH2 and the like into the interior, thereby effectively inhibiting the oxidation of tea polyphenols. The modified deodorant can eliminate the emission of odorous gases. At the same time, the tea polyphenols inside the modified inclusion compound can decompose the odorous gas molecules through redox reactions. While completely eliminating the odor, it can also emit the aromatic smell brought by tea polyphenols, thereby giving the textile fabrics excellent deodorizing properties. In addition, the polyhexamethylene guanidine in the modified deodorant, as a cationic polymer, not only has strong antibacterial properties, effectively inhibits the reproduction of organic microorganisms such as bacteria on the surface of textile fabrics, and gives the textile fabrics good antibacterial properties, but also can improve the encapsulation rate of the modified inclusion compound through ionic cross-linking, effectively prevent the oxidation of tea polyphenols, and further improve the deodorizing performance of textile fabrics.

[0025] The present invention effectively improves the hydroxyl activity on the surface of the textile fabric through alkali treatment, provides chemical reaction sites for the grafting reaction of the modified deodorant, and enhances the intermolecular force between the modified deodorant and the textile fabric. At the same time, the introduced modified deodorant can not only improve the odor elimination performance of the textile fabric, but also improve the antibacterial performance of the textile fabric. DETAILED DESCRIPTION

[0026] 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.

[0027] Example 1

[0028] This embodiment provides a modified deodorant, which is prepared by the following steps:

[0029] A1. Add 18 g of chitosan to 100 mL of 1 wt% acetic acid solution, stir to dissolve, filter through a 0.45 μm microporous membrane, add 5 wt% sodium hydroxide solution to adjust the pH value to 3.2, add 6 mL of 2 mg / mL sodium tripolyphosphate aqueous solution, stir to mix, dropwise add 2.4 mL of 12 mg / mL tea polyphenol aqueous solution, control the dropping time to 3 min, stir and react at 20 ° C for 40 min, centrifuge, wash and dry to obtain a modified inclusion compound;

[0030] A2. Add 8 g of polyhexamethylene guanidine to 100 mL of 51 wt% glacial acetic acid solution, stir to dissolve, add 6 g of modified inclusion compound, stir to mix, add 0.02 g of ammonium cerium nitrate in a nitrogen atmosphere and mix well, then add 10 wt% dilute nitric acid to adjust the pH value to 5, and continue stirring to react for 3 h, then add excess acetone to precipitate, and finally extract with anhydrous ethanol, dry and grind to obtain a modified deodorant.

[0031] Example 2

[0032] This embodiment provides a modified deodorant, which is prepared by the following steps:

[0033] A1. Add 20 g of chitosan to 100 mL of 1 wt% acetic acid solution, stir to dissolve, filter through a 0.45 μm microporous membrane, add 5 wt% sodium hydroxide solution to adjust the pH value to 5.3, add 6 mL of 4 mg / mL sodium tripolyphosphate aqueous solution, stir to mix, dropwise add 2.4 mL of 16 mg / mL tea polyphenol aqueous solution, control the dropping time to 3 min, stir and react at 25 ° C for 45 min, centrifuge, wash and dry to obtain a modified inclusion compound;

[0034] A2. Add 10 g of polyhexamethylene guanidine to 100 mL of 51 wt% glacial acetic acid solution, stir to dissolve, add 10 g of modified inclusion compound, stir to mix, add 0.1 g of ammonium cerium nitrate in a nitrogen atmosphere and mix well, then add 10 wt% dilute nitric acid to adjust the pH value to 5.5, continue stirring and react for 3.5 h, then add excess acetone to precipitate, and finally extract with anhydrous ethanol, dry and grind to obtain a modified deodorant.

[0035] Example 3

[0036] This embodiment provides a modified deodorant, which is prepared by the following steps:

[0037] A1. Add 23 g of chitosan to 100 mL of 1 wt% acetic acid solution, stir to dissolve, filter through a 0.45 μm microporous membrane, add 5 wt% sodium hydroxide solution to adjust the pH value to 6.4, add 6 mL of 6 mg / mL sodium tripolyphosphate aqueous solution, stir to mix, dropwise add 2.4 mL of 20 mg / mL tea polyphenol aqueous solution, control the dropping time to 3 min, stir and react at 30 ° C for 50 min, centrifuge, wash and dry to obtain a modified inclusion compound;

[0038] A2. Add 13 g of polyhexamethylene guanidine to 100 mL of 51 wt% glacial acetic acid solution, stir to dissolve, add 15 g of modified inclusion compound, stir to mix, add 0.2 g of ammonium cerium nitrate in a nitrogen atmosphere and mix well, then add 10 wt% dilute nitric acid to adjust the pH to 6, and continue stirring to react for 4 h, then add excess acetone to precipitate, and finally extract with anhydrous ethanol, dry and grind to obtain a modified deodorant.

[0039] Example 4

[0040] This embodiment provides a production process for deodorizing textile fabrics, comprising the following steps:

[0041] Step S1: Pretreatment of textile fabrics

[0042] 10 g of textile fabric washed with acetone and dried was placed in 90 mL of a 2 wt% sodium hydroxide solution, immersed at 90° C. for 0.5 h, then washed with deionized water and dried to obtain a pretreated fabric;

[0043] Step S2: Preparation of modified finishing liquid

[0044] Add 0.5 g of sodium hypophosphite to 100 mL of deionized water, stir to dissolve, add 8 g of modified deodorant, mix well, then add 2 g of butane tetraacetic acid, stir to mix, and obtain a modified finishing solution;

[0045] Step S3: Preparation of odor-removing textile fabric

[0046] Add 10 g of pretreated fabric to 100 mL of modified finishing liquid, let it stand for 1 min, then take it out, dry the water at 100 ° C, and then bake it at 160 ° C for 4 min. After cooling, the deodorized textile fabric is obtained.

[0047] Example 5

[0048] This embodiment provides a production process for deodorizing textile fabrics, comprising the following steps:

[0049] Step S1: Pretreatment of textile fabrics

[0050] 13 g of textile fabric washed with acetone and dried was placed in 90 mL of a 2 wt % sodium hydroxide solution, immersed at 93° C. for 0.5 h, then washed with deionized water and dried to obtain a pretreated fabric;

[0051] Step S2: Preparation of modified finishing liquid

[0052] Add 0.7 g of sodium hypophosphite to 100 mL of deionized water, stir to dissolve, add 12 g of modified deodorant, mix well, then add 4 g of butane tetraacetic acid, stir to mix, and obtain a modified finishing solution;

[0053] Step S3: Preparation of odor-removing textile fabric

[0054] 13 g of pretreated fabric was added to 100 mL of modified finishing liquid, and the fabric was taken out after standing for 1 min, and the water was dried at 105 ° C, and then baked at 165 ° C for 4.5 min. After cooling, the deodorized textile fabric was obtained.

[0055] Example 6

[0056] This embodiment provides a production process for deodorizing textile fabrics, comprising the following steps:

[0057] Step S1: Pretreatment of textile fabrics

[0058] 15 g of textile fabric washed with acetone and dried was placed in 90 mL of a 2 wt% sodium hydroxide solution, immersed at 95° C. for 1 hour, then washed with deionized water and dried to obtain a pretreated fabric;

[0059] Step S2: Preparation of modified finishing liquid

[0060] Add 1 g of sodium hypophosphite to 100 mL of deionized water, stir to dissolve, add 16 g of modified deodorant, mix well, then add 5 g of butane tetraacetic acid, stir to mix, and obtain a modified finishing solution;

[0061] Step S3: Preparation of odor-removing textile fabric

[0062] 15 g of pretreated fabric was added to 100 mL of modified finishing liquid, and the fabric was taken out after standing for 1 min, and the water was dried at 110° C., and then baked at 170° C. for 5 min. After cooling, the deodorized textile fabric was obtained.

[0063] Comparative Example 1: Compared with Example 4, the modified deodorant was replaced with tea polyphenols in equal amount, and the rest was the same.

[0064] Comparative Example 2: Compared with Example 4, the modified deodorant was replaced with chitosan in equal amount, and the rest was the same.

[0065] Comparative Example 3: Compared with Example 4, the modified deodorant was replaced with β-cyclodextrin in equal amount, and the rest was the same.

[0066] Performance tests were performed on Examples 4 to 6 and Comparative Examples 1 to 3. Deodorization test: According to GB / T33610.2-2017, the sample was made into a test specimen with a specification of 10 cm×10 cm, placed in a concentrated ammonia water suction bottle, and 100 mL of gas was extracted after 2 hours to detect the ammonia content. The ammonia removal rate was calculated and recorded; the antibacterial performance test was performed according to GB / T 20944.3-2008 on Gram-negative bacteria Escherichia coli and Gram-positive Staphylococcus aureus. The antibacterial rate was calculated at the same dilution ratio. The results are shown in Table 1:

[0067] Table 1

[0068]

[0069]

[0070] It can be seen from Table 1 that the ammonia removal rate of the textile fabrics prepared by the modified deodorant in Examples 4-6 is significantly greater than that in Comparative Examples 1-3, and has good deodorizing performance. At the same time, the antibacterial rates for Escherichia coli and Staphylococcus are significantly greater than those in Comparative Examples 1-3, and have good antibacterial performance, indicating that the textile fabrics prepared by the modified finishing liquid containing the modified deodorant have more excellent deodorizing performance.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for deodorizing textile fabrics, characterized in that: The following steps are involved: Step S1: Pretreatment of textile fabrics The textile fabric washed with acetone and dried is placed in a sodium hydroxide solution, immersed for 0.5-1h at 90-95°C, then washed with deionized water and dried to obtain a pretreated fabric; Step S2: Preparation of odor-removing textile fabric The pretreated fabric is added to the modified finishing liquid, and after standing for 1 minute, the fabric is taken out, the water is dried at 100-110° C., and then baked at 160-170° C. for 4-5 minutes. After cooling, the deodorized textile fabric is obtained.

2. The production process of a deodorizing textile fabric according to claim 1, characterized in that: The usage ratio of the textile fabric and the sodium hydroxide solution is 10-15 g:90 mL; the concentration of the sodium hydroxide solution is 2 wt %.

3. The production process of a deodorizing textile fabric according to claim 1, characterized in that: The usage ratio of the pretreated fabric to the modified finishing liquid is 10-15 g:100 mL.

4. The production process of a deodorizing textile fabric according to claim 1, characterized in that: The modified finishing liquid is prepared by the following steps: Add sodium hypophosphite to deionized water, stir to dissolve, add modified deodorant, mix evenly, then add butane tetraacetic acid, stir to mix, and obtain modified finishing liquid.

5. The production process of a deodorizing textile fabric according to claim 4, characterized in that: The usage ratio of the deionized water, sodium hypophosphite, modified deodorant and butane tetraacetic acid is 100 mL: 0.5-1 g: 8-16 g: 2-5 g.

6. The production process of a deodorizing textile fabric according to claim 4, characterized in that: The modified deodorant is prepared by the following steps: A1. Add chitosan to an acetic acid solution with a concentration of 1wt%, stir to dissolve, filter through a 0.45μm microporous membrane, add a sodium hydroxide solution with a concentration of 5wt% to adjust the pH value to 3.2-6.4, add a sodium tripolyphosphate aqueous solution, stir and mix, dropwise add a tea polyphenol aqueous solution, control the dropping time to 3min, and stir and react at 20-30°C for 40-50min, then centrifuge, wash and dry to obtain a modified inclusion compound; A2. Add polyhexamethylene guanidine to a 51wt% glacial acetic acid solution, stir to dissolve, add the modified inclusion compound, stir to mix, add cerium ammonium nitrate in a nitrogen atmosphere and mix evenly, then add 10wt% dilute nitric acid to adjust the pH value to 5-6, continue stirring to react for 3-4h, then add excess acetone to precipitate, and finally extract with anhydrous ethanol, dry and grind to obtain a modified deodorant.

7. The production process of a deodorizing textile fabric according to claim 6, characterized in that: The dosage ratio of the acetic acid solution, chitosan, sodium tripolyphosphate aqueous solution and tea polyphenol aqueous solution is 100mL:18-23g:6mL:2.4mL; the deacetylation degree of the chitosan is 90%.

8. The production process of a deodorizing textile fabric according to claim 6, characterized in that: The concentration of the sodium tripolyphosphate aqueous solution is 2-6 mg / mL; the concentration of the tea polyphenol aqueous solution is 12-20 mg / mL.

9. The production process of a deodorizing textile fabric according to claim 6, characterized in that: The usage ratio of the glacial acetic acid solution, polyhexamethylene guanidine, modified inclusion compound and ammonium cerium nitrate is 100 mL: 8-13 g: 6-15 g: 0.02-0.2 g.

10. A deodorizing textile fabric, characterized in that: Obtained according to the production process according to any one of claims 1 to 9.

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