Antibacterial and comfortable spandex fabric and manufacturing method thereof

Abstract

The invention discloses an antibacterial and comfortable spandex fabric. The spandex fabric is prepared by dipping spandex yarn into an antibacterial solution containing an antibacterial composition, irradiating the fabric with ultraviolet light to bond effective antibacterial components to the spandex yarn, and finally spinning and weaving the fabric to obtain the antibacterial and comfortable spandex fabric. The spandex yarn is a polyurethane block copolymer obtained by polycondensing polytetramethylene ether glycol and isophorone diisocyanate with ethylenediamine as a chain extender. The antibacterial composition comprises the following raw materials in parts by weight: 5-10 parts of a p-coumaric acid derivative, 15-20 parts of a surfactant, 1-3 parts of menthol, and 1-3 parts of sodium carboxymethyl cellulose. The prepared spandex fabric has a smooth hand feel, is soft and comfortable, has good antibacterial performance, and has good durability. The spandex fabric can be applied to the fields of sportswear, underwear fabrics, socks fabrics, and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics, and in particular relates to an antibacterial and comfortable spandex fabric and a manufacturing method thereof. Background Art

[0002] Spandex is a block copolymer in which polyurethane accounts for more than 85%, also known as polyurethane fiber. There are two types of segments in spandex fiber, one is called soft segment and the other is called hard segment. The part containing urea and carbamate groups is called "hard segment" because this part has the characteristics of high rigidity, easy crystallization, and high melting point. The part containing diol structure is generally called "soft segment" because this part has the characteristics of high flexibility, high molecular weight, and long chain segment.

[0003] Spandex boasts excellent elasticity, fineness, high strength, high elongation, light weight, soft feel, good lightfastness, and excellent dyeing properties and color fastness. It is widely used in underwear, outerwear, swimwear, stockings, and medical and sanitary products. Spandex fiber, when used as fabric for clothing, comes into close contact with the human body. However, spandex fiber itself does not possess antibacterial properties. Therefore, effective antibacterial treatment of spandex fiber can effectively prevent bacterial infections and benefit health.

[0004] Ultraviolet light is an environmentally friendly, efficient, simple and fast treatment method that can be used for fiber surface modification. Polyester fibers degrade under high-energy irradiation conditions, generating many free radicals, which are then introduced for activation. Summary of the Invention

[0005] The purpose of the present invention is to provide an antibacterial and comfortable spandex fabric and a manufacturing method thereof.

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

[0007] The invention discloses an antibacterial and comfortable spandex fabric. The spandex fabric is prepared by dipping spandex yarn into an antibacterial solution containing an antibacterial composition, irradiating the fabric with ultraviolet light to bond the effective antibacterial components to the spandex yarn, and finally spinning and weaving the fabric to obtain the antibacterial and comfortable spandex fabric.

[0008] Furthermore, the spandex yarn is a polyurethane block copolymer obtained by polycondensing polytetramethylene ether glycol and isophorone diisocyanate with ethylenediamine as a chain extender.

[0009] Furthermore, the specific preparation method of the spandex yarn is as follows: 200g of polytetramethylene ether glycol and 45-50g of isophorone diisocyanate are weighed and placed in a reaction bottle, reacting at 70-80°C for 1h, cooling to 30-35°C, adding 400-500ml of solvent DMF, stirring for 10-15min, and then adding 100-150ml of a chain extender DMF solution with a mass concentration of 3-5% while stirring to react, and the addition is completed within 1-1.5h. After completion, the stirring reaction is continued for 2-3h to obtain a spinning solution, and the spinning solution is pressed into a spinning machine for spinning to obtain the spandex yarn.

[0010] Furthermore, the antibacterial composition comprises the following raw materials in parts by weight: 5-10 parts of p-coumaric acid derivatives, 15-20 parts of surfactants, 1-3 parts of menthol, and 1-3 parts of sodium carboxymethyl cellulose.

[0011] p-Coumaric acid is a naturally occurring phenolic acid compound with good antioxidant, anti-inflammatory, and antibacterial biological activities. However, the solubility and stability of p-coumaric acid are slightly poor, which limits its application.

[0012] Furthermore, the preparation method of the p-coumaric acid derivative is as follows: 1.6 g of p-coumaric acid, 2-5 ml of triethylamine and 100-150 ml of DMF are weighed and added to a reaction flask, the reaction flask is placed in an ice-salt bath, and then 0.2-0.3 g of EDC, 0.1-0.15 g of DMPA and 1.1-1.2 g of serine are added to the reaction flask in sequence. After the addition is completed, the reaction flask is placed at room temperature, stirred at room temperature of 20°C-30°C for 12-15 hours, and after the reaction is completed, extraction and purification are performed to obtain the p-coumaric acid derivative.

[0013] Furthermore, the extraction and purification is specifically as follows: the crude reaction solution after the reaction is concentrated under reduced pressure, 50-70 ml of a 20-30% sodium chloride solution is added to the reaction flask, shaken well, and then 20-30 ml of ethyl acetate is added for extraction 2-3 times, the organic phase is collected, and the organic phase is washed with a 3-5% sodium bicarbonate aqueous solution. The final organic phase is distilled under reduced pressure to obtain a p-coumaric acid derivative.

[0014] Furthermore, the surfactant is (3-acrylamidopropyl)trimethylammonium chloride;

[0015] The structural formula is as follows:

[0016]

[0017] (3-Acrylamidopropyl)trimethylammonium chloride acts as a surfactant, which can better disperse other components in the antibacterial composition in the antibacterial solution. In addition, the structure contains a quaternary ammonium salt antibacterial component, which can assist in further antibacterial effects, and the imino hydrophilic group can further increase the hydrophilic properties of the spandex yarn. Even if (3-acrylamidopropyl)trimethylammonium chloride is bonded to the spandex yarn, it will not affect the comfort of the spandex fabric.

[0018] A method for manufacturing an antibacterial and comfortable spandex fabric, the specific manufacturing method comprising the following steps:

[0019] Step 1: Preparation of antibacterial solution

[0020] Weigh 1.5-2.2g of the antibacterial composition and 0.2-0.3g of the initiator potassium persulfate, add 200ml of 75-80% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0021] Step 2: Ultraviolet irradiation

[0022] 100g of spandex yarn is weighed and irradiated with a 250-300w ultraviolet lamp, turned over every 2 minutes, and the irradiation time is 20-30 minutes; the irradiated spandex yarn is immersed in an antibacterial solution and continued to be irradiated with a ultraviolet lamp for 1-1.5 hours. After the irradiation is completed, the antibacterial spandex yarn is taken out and dried to obtain the antibacterial spandex yarn, and after spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0023] Beneficial effects of the present invention:

[0024] The invention provides an antibacterial and comfortable spandex fabric. Prepared spandex yarn is immersed in an antibacterial solution containing an antibacterial composition, and ultraviolet irradiation is adopted. The spandex yarn generates many free radicals under the ultraviolet irradiation condition, and then the free radicals are introduced into the spandex yarn for activation. The p-coumaric acid derivative and the surfactant (3-acrylamidopropyl)trimethylammonium chloride in the antibacterial composition both have good antibacterial performance and contain double bond structures. Under the irradiation of ultraviolet light, the double bonds are broken into free radicals. Under the action of potassium persulfate, the p-coumaric acid derivative and the surfactant (3-acrylamidopropyl)trimethylammonium chloride can undergo free radical reaction with the spandex yarn containing the free radicals, and then the effective antibacterial components are bonded to the spandex yarn. Finally, after spinning and weaving, the antibacterial and comfortable spandex fabric is obtained. The fabric has good antibacterial performance and the antibacterial performance has good durability.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 These are SEM images of the spandex yarn and the antibacterial spandex yarn in Example 1. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Preparation of spandex yarn

[0030] The specific preparation method is as follows: 200g of polytetramethylene ether glycol and 45g of isophorone diisocyanate are weighed and put into a reaction bottle, reacted at 70°C for 1h, cooled to 35°C, 500ml of solvent DMF is added, stirred for 10min, and 100ml of 5% mass concentration of chain extender ethylenediamine DMF solution is added while stirring to react, and the addition is completed within 1h. After completion, stirring and reacting are continued for 2h to obtain a spinning solution, and the spinning solution is pressed into a spinning machine (wherein the temperature of the shaft is 240°C and the wind volume of the shaft is 600m / h) for spinning to obtain spandex yarn.

[0031] The preparation method of p-coumaric acid derivatives is as follows:

[0032] 1.6 g of p-coumaric acid, 5 ml of triethylamine and 100 ml of DMF were weighed and added to a reaction flask, which was placed in an ice-salt bath. 0.25 g of EDC, 0.15 g of DMPA and 1.1 g of serine were then added to the reaction flask in sequence. After the addition was complete, the reaction flask was placed at room temperature and stirred at 20°C-30°C for 15 hours. After the reaction was completed, the crude reaction solution was concentrated under reduced pressure, 50 ml of a 20% sodium chloride solution was added to the reaction flask, shaken well, and extracted three times with 30 ml of ethyl acetate. The organic phase was collected and washed with a 5% sodium bicarbonate aqueous solution. The final organic phase was distilled under reduced pressure to obtain a p-coumaric acid derivative.

[0033]

[0034] 1H NMR (400MHz, CDCl3): δ11.19(s,1H),8.04(s,1H),7.59(d,J=8.0Hz,2H),7.35(d,1H),6.5 9(d,J=8.0Hz,2H),6.41(d,1H),5.30(s,1H),4.10(t,1H),3.89(d,2H),3.59(s,1H).[MS(C 12 H 13 NO5)(EI,m / z):251.084[M] + .

[0035] Example 1

[0036] Step 1: Preparation of antibacterial solution

[0037] The antibacterial composition comprises the following raw materials in parts by weight: 6 parts of p-coumaric acid derivatives, 18 parts of surfactant (3-acrylamidopropyl) trimethylammonium chloride, 1 part of menthol, and 1 part of sodium carboxymethyl cellulose;

[0038] Weigh 2.0 g of the antibacterial composition and 0.2 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0039] Step 2: Ultraviolet irradiation

[0040] Weigh 100g of spandex yarn and irradiate it with a 300w ultraviolet lamp, turning it over every 2 minutes for 30 minutes; immerse the irradiated spandex yarn in an antibacterial solution and continue to irradiate it with an ultraviolet lamp for 1 hour. After the irradiation is completed, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0041] like Figure 1 Shown are SEM images of spandex yarn and antibacterial spandex yarn. Figure A shows spandex yarn with a smooth surface, and Figure B shows antibacterial spandex yarn with a layered or cracked surface and grafts attached to the surface.

[0042] Example 2

[0043] Step 1: Preparation of antibacterial solution

[0044] The antibacterial composition comprises the following raw materials in parts by weight: 5 parts of p-coumaric acid derivative, 20 parts of surfactant (3-acrylamidopropyl) trimethylammonium chloride, 2 parts of menthol, and 2 parts of sodium carboxymethyl cellulose;

[0045] Weigh 1.8 g of the antibacterial composition and 0.2 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0046] Step 2: Ultraviolet irradiation

[0047] Weigh 100g of spandex yarn and irradiate it with a 300w ultraviolet lamp, turning it over every 2 minutes for 30 minutes; immerse the irradiated spandex yarn in an antibacterial solution and continue to irradiate it with an ultraviolet lamp for 1 hour. After the irradiation is completed, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0048] Example 3

[0049] Step 1: Preparation of antibacterial solution

[0050] The antibacterial composition comprises the following raw materials in parts by weight: 10 parts of p-coumaric acid derivatives, 15 parts of surfactant (3-acrylamidopropyl) trimethylammonium chloride, 3 parts of menthol, and 3 parts of sodium carboxymethyl cellulose;

[0051] Weigh 2.2 g of the antibacterial composition and 0.3 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0052] Step 2: Ultraviolet irradiation

[0053] Weigh 100g of spandex yarn and irradiate it with a 300w ultraviolet lamp, turning it over every 2 minutes for 30 minutes; immerse the irradiated spandex yarn in an antibacterial solution and continue to irradiate it with an ultraviolet lamp for 1 hour. After the irradiation is completed, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0054] Comparative Example 1

[0055] Without ultraviolet irradiation, the rest is the same as in Example 1, specifically:

[0056] Step 1: Preparation of antibacterial solution

[0057] The antibacterial composition comprises the following raw materials in parts by weight: 6 parts of p-coumaric acid derivatives, 18 parts of surfactant (3-acrylamidopropyl) trimethylammonium chloride, 1 part of menthol, and 1 part of sodium carboxymethyl cellulose;

[0058] Weigh 2.0 g of the antibacterial composition and 0.2 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0059] Step 2: Preparation of spandex fabric

[0060] Weigh 100g of spandex yarn and immerse it in the antibacterial solution for 1 hour. After the immersion, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0061] Comparative Example 2

[0062] Without adding p-coumaric acid derivative, the rest is the same as in Example 1, specifically:

[0063] Step 1: Preparation of antibacterial solution

[0064] The antibacterial composition comprises the following raw materials in parts by weight: 18 parts of surfactant (3-acrylamidopropyl) trimethylammonium chloride, 1 part of menthol, and 1 part of sodium carboxymethyl cellulose;

[0065] Weigh 2.0 g of the antibacterial composition and 0.2 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0066] Step 2: Ultraviolet irradiation

[0067] Weigh 100g of spandex yarn and irradiate it with a 300w ultraviolet lamp, turning it over every 2 minutes for 30 minutes; immerse the irradiated spandex yarn in an antibacterial solution and continue to irradiate it with an ultraviolet lamp for 1 hour. After the irradiation is completed, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0068] Comparative Example 3

[0069] Without adding surfactant (3-acrylamidopropyl)trimethylammonium chloride, the rest is the same as in Example 1, specifically:

[0070] Step 1: Preparation of antibacterial solution

[0071] The antibacterial composition comprises the following raw materials in parts by weight: 6 parts of p-coumaric acid derivatives, 1 part of menthol, and 1 part of sodium carboxymethyl cellulose;

[0072] Weigh 2.0 g of the antibacterial composition and 0.2 g of the initiator potassium persulfate, add 200 ml of 75% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside;

[0073] Step 2: Ultraviolet irradiation

[0074] Weigh 100g of spandex yarn and irradiate it with a 300w ultraviolet lamp, turning it over every 2 minutes for 30 minutes; immerse the irradiated spandex yarn in an antibacterial solution and continue to irradiate it with an ultraviolet lamp for 1 hour. After the irradiation is completed, take it out and dry it to obtain the antibacterial spandex yarn. After spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

[0075] Performance test of the newly prepared antibacterial and comfortable spandex fabric

[0076] Softness test

[0077] The softness of the fabrics prepared in Examples 1-3 and Comparative Examples 1-3 was tested using a RH-R / 100 computer softness tester. The results are shown in the following table:

[0078]

[0079] It can be seen from the above table that the spandex fabrics prepared in Examples 1-3 and Comparative Examples 1-3 have a smooth feel and good softness.

[0080] Antibacterial performance test:

[0081] Test method: Refer to the standard GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method" to test the antibacterial properties of spandex

[0082] Test product Staphylococcus aureus Escherichia coli Candida albicans Example 1 99.3％ 98.1％ 98.6％ Example 2 99.5％ 98.5％ 99.2％ Example 3 99.8％ 98.7％ 99.4％ Comparative Example 1 98.8％ 96.5％ 97.2％ Comparative Example 2 82.3％ 85.6％ 82.7％ Comparative Example 3 92.4％ 89.8％ 90.6％

[0083] It can be seen from the above table that the antibacterial and comfortable spandex fabric prepared by the technical solution of the present application has excellent antibacterial performance against Staphylococcus aureus, Escherichia coli, and Candida albicans; Comparative Example 1 also has good antibacterial properties. The antibacterial effects of Comparative Example 2 and Comparative Example 3 are reduced after the lack of one of the antibacterial components. Although the antibacterial effect of Comparative Example 3 is good, it may be that the lack of the addition of a surfactant reduces its dispersion performance and fails to achieve the antibacterial effect of Examples 1-3.

[0084] Antimicrobial persistence testing

[0085] The fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were cut into 10*10 cm sizes, washed with an appropriate amount of laundry detergent for 2 minutes, and then rinsed twice with clean water. This process was repeated 50 times to test the antibacterial properties of the spandex fabrics.

[0086] Test product Staphylococcus aureus Escherichia coli Candida albicans Example 1 99.1％ 97.5％ 98.2％ Example 2 99.1％ 97.7％ 98.9％ Example 3 99.3％ 97.8％ 99.0％ Comparative Example 1 75.2％ 72.8％ 77.5％ Comparative Example 2 76.9％ 81.7％ 79.6％ Comparative Example 3 90.8％ 88.5％ 88.7％

[0087] It can be seen from the above table that the antibacterial and comfortable spandex fabric prepared by the technical solution of the present application still has excellent antibacterial properties against Staphylococcus aureus, Escherichia coli, and Candida albicans after washing 50 times, and the antibacterial performance is long-lasting; Comparative Example 1 does not use ultraviolet irradiation, but only adsorbs on the spandex yarn. Each time it is washed, the antibacterial components will precipitate, and the antibacterial performance will be reduced.

[0088] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. An antibacterial and comfortable spandex fabric, characterized by: The spandex fabric is prepared by dipping spandex yarn into an antibacterial solution containing an antibacterial composition, irradiating it with ultraviolet light to bond the effective antibacterial components to the spandex yarn, and finally spinning and weaving the yarn to obtain the antibacterial and comfortable spandex fabric. The antibacterial composition comprises the following raw materials in parts by weight: 5-10 parts of p-coumaric acid derivatives, 15-20 parts of surfactants, 1-3 parts of menthol, and 1-3 parts of sodium carboxymethyl cellulose; The preparation method of the p-coumaric acid derivative is as follows: 1.6g of p-coumaric acid, 2-5ml of triethylamine and 100-150ml of DMF are weighed and added to a reaction flask, the reaction flask is placed in an ice-salt bath, and then 0.2-0.3g of EDC, 0.1-0.15g of DMPA and 1.1-1.2g of serine are added to the reaction flask in sequence. After the addition is completed, the reaction flask is placed at room temperature and stirred at 20°C-30°C for 12-15h. After the reaction is completed, extraction and purification are performed to obtain the p-coumaric acid derivative. The extraction and purification specifically comprises: concentrating the crude reaction solution under reduced pressure, adding 50-70ml of a 20-30% sodium chloride solution to the reaction flask, shaking well, adding 20-30ml of ethyl acetate, extracting 2-3 times, collecting the organic phase, washing the organic phase with a 3-5% sodium bicarbonate aqueous solution, and distilling the final organic phase under reduced pressure to obtain the p-coumaric acid derivative. The surfactant is (3-acrylamidopropyl)trimethylammonium chloride.

2. The antibacterial and comfortable spandex fabric according to claim 1, characterized in that: The spandex yarn is a polyurethane block copolymer obtained by polycondensing polytetramethylene ether glycol and isophorone diisocyanate with ethylenediamine as a chain extender.

3. The antibacterial and comfortable spandex fabric according to claim 2, characterized in that: The specific preparation method of the spandex yarn is as follows: 200g of polytetramethylene ether glycol and 45-50g of isophorone diisocyanate are weighed and put into a reaction bottle, reacting at 70-80°C for 1h, cooling to 30-35°C, adding 400-500ml of solvent DMF, stirring for 10-15min, and then adding 100-150ml of 3-5% by mass concentration of chain extender ethylenediamine DMF solution while stirring to react, and the addition is completed in 1-1.5h. After completion, stirring and reacting are continued for 2-3h to obtain a spinning solution, and the spinning solution is pressed into a spinning machine for spinning to obtain the spandex yarn.

4. A method for manufacturing the antibacterial and comfortable spandex fabric according to any one of claims 1 to 3, characterized in that: The specific manufacturing method includes the following steps: Step 1: Preparation of antibacterial solution Weigh 1.5-2.2g of the antibacterial composition and 0.2-0.3g of the initiator potassium persulfate, add 200ml of 75-80% ethanol aqueous solution, stir until completely dissolved to obtain an antibacterial solution, and set aside; Step 2: Ultraviolet irradiation 100g of spandex yarn is weighed and irradiated with a 250-300w ultraviolet lamp, turned over every 2 minutes, and the irradiation time is 20-30 minutes; the irradiated spandex yarn is immersed in an antibacterial solution and continued to be irradiated with a ultraviolet lamp for 1-1.5 hours. After the irradiation is completed, the antibacterial spandex yarn is taken out and dried to obtain the antibacterial spandex yarn, and after spinning and weaving, the antibacterial and comfortable spandex fabric is obtained.

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