Comfortable antibacterial fabric and preparation method thereof

Abstract

The application relates to the technical field of fabric preparation, and discloses a comfortable antibacterial fabric and a preparation method thereof. An antibacterial softening compound is prepared and introduced into the spinning process of spandex fibers, so that the prepared spandex fibers have excellent softness and good antibacterial performance, and the antibacterial substances cannot be precipitated during long-time use, and long-term antibacterial effect can be achieved. The cotton fibers are modified, and a hindered amine group is grafted on the surface of the cotton fibers through free radical polymerization, so that the cotton fibers have excellent moisture absorption and long-term antioxidant effect. The two kinds of fibers are blended to prepare a fabric, the fabric has high softness and moisture absorption, good wearing comfort, excellent antibacterial effect and antioxidant capacity, and has a long service life.

Description

Technical Field

[0001] This invention relates to the field of fabric preparation technology, specifically to a comfortable antibacterial fabric and its preparation method. Background Technology

[0002] Clothing is not only a necessity of life, but also a form of art and cultural expression. It records human history and culture, and reflects our identity, personality, and aesthetics. It is one of the most direct expressions of people's external beauty. With human progress and the improvement of living standards, the requirements for clothing are also getting higher and higher. Comfort and fashion have become important reference factors for people to choose clothing. The choice of fabric determines the comfort of clothing and the most direct sensory experience. Among them, spandex fabric, as a highly elastic and resilient fabric, has received widespread attention and is used in various types of clothing. However, its drawback is that spandex fabric has poor moisture absorption, which can easily cause sweating after wearing it for a long time. In a humid and hot environment, bacteria can easily grow, affecting human health. At the same time, its anti-aging ability is poor, and it is easy to cause fiber breakage due to aging, resulting in damage to clothing and adverse effects. Therefore, when using spandex fabric, people usually make improvements to the fabric. At present, there are usually two methods to improve spandex fabric: one is to use comfortable and breathable fibers to blend with spandex fibers to improve the overall comfort of the fabric; the other is to modify spandex fibers to improve their performance.

[0003] For example, patent CN105544078B discloses a cotton / spandex air layer thermal insulation fabric and its manufacturing method. The thermal insulation fabric has a double-sided structure with an air layer in the middle. The middle layer uses high-twist cotton yarn. The fabric has wear-resistant properties. By blending cotton yarn, it has a soft and warm effect and good anti-pilling effect. However, the fabric does not have antibacterial properties and is prone to bacterial growth in humid and hot environments. Moreover, no improvements have been made in anti-aging, which affects the storage time of the fabric.

[0004] Patent CN115182070B discloses an antibacterial and breathable fabric. It involves surface modification of nano-titanium dioxide, followed by in-situ polymerization with polyester polyol and diisocyanate. After sodium hypochlorite halogenation and spinning, an antibacterial and breathable fabric with a spandex fiber membrane is obtained. The use of nano-titanium dioxide to modify the spandex fabric gives it excellent tensile properties. Simultaneously, the sodium hypochlorite halogenation process generates NCl bonds with antibacterial properties, resulting in excellent bactericidal activity. However, the fabric's softness is not improved, affecting wearing comfort. Summary of the Invention

[0005] The purpose of this invention is to provide a comfortable antibacterial fabric and its preparation method, which solves the following technical problems: (1) Spandex fabric has poor anti-aging ability. After long-term exposure to sunlight, the spandex fibers are prone to aging and breakage, causing damage to clothing; (2) Spandex fabric has poor moisture absorption and low comfort. Wearing it for a long time can easily cause sweating and create a hot and humid environment that easily breeds bacteria and affects human health.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for preparing a comfortable antibacterial fabric includes the following preparation steps:

[0008] Step 1: Place polyurethane in N,N-dimethylacetamide, add antibacterial softening compound, and mix thoroughly to obtain spinning solution;

[0009] Step 2: Control the flow rate of the spinning solution and perform wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0010] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0011] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0012] Furthermore, the polyurethane is polymerized from toluene diisocyanate and polytetrahydrofuran ether diol.

[0013] Furthermore, in step two, the flow rate of the spinning solution is 0.4-0.8 ml / h.

[0014] Furthermore, the preparation method of the antibacterial softening complex is as follows:

[0015] Amino-terminated silicone oil was placed in anhydrous ethanol, curcumin was added, and the mixture was reacted at room temperature for 24-48 hours. After vacuum distillation, an antibacterial and compliant complex was obtained.

[0016] Through the above technical solution, the amino groups at both ends of the amino-terminated silicone oil react with the ester groups in the curcumin structure to obtain an antibacterial softening complex. This antibacterial softening complex contains a polyorganosiloxane backbone, which has extremely low surface energy and excellent lubricity. When it is incorporated into the synthesis process of spandex fibers, the silicon-oxygen-silicon bonds in its structure can rotate freely, increasing the distance between fibers, thereby improving the softness of the spandex fibers and the wearing comfort of the prepared fabric. This antibacterial softening complex also contains curcumin, which has a broad-spectrum antibacterial effect, can inhibit the synthesis of bacterial cell walls and proteins, and interfere with bacterial growth and reproduction. The ingredients are safe and will not cause allergic reactions when directly contacting the skin. Furthermore, curcumin is grafted onto both ends of the amino-terminated silicone oil through chemical bonding, making it difficult for antibacterial substances to precipitate out, thus enabling the prepared spandex fabric to have a long-lasting antibacterial effect.

[0017] Furthermore, the viscosity of the amino-terminated silicone oil is 10000-15000 mPa·s.

[0018] Furthermore, the method for preparing the antioxidant cotton fiber includes the following steps:

[0019] S1: Place cotton fibers in dichloromethane, place them in an ice bath at 0-4℃, add 3-bromopropene and catalyst, stir for 1-2 hours, then raise the temperature to room temperature and react for 15-20 hours. After filtration, washing and drying, alkenylated cotton fibers are obtained.

[0020] S2: Place the alkenylated cotton fiber in deionized water, add 2-methyl-2-acrylate-2,2,6,6-tetramethyl-4-piperidinyl ester, stir for 0.5-1h, then add the initiator, heat to 50-60℃ and react for 3-5h, cool to room temperature, filter, wash and dry to obtain antioxidant cotton fiber.

[0021] Through the above technical solution, under low temperature and the action of a catalyst, the hydroxyl groups in the cotton fiber structure undergo a substitution reaction with the active bromine in the 3-bromopropylene structure, grafting alkenyl groups onto the surface of the cotton fiber. Then, under the action of an initiator, a free radical polymerization reaction is initiated between the alkenyl groups in the 2-methyl-2-acrylate-2,2,6,6-tetramethyl-4-piperidinyl ester structure and the alkenyl groups on the surface of the cotton fiber, resulting in antioxidant cotton fiber with hindered amine groups coated on the surface. This antioxidant cotton fiber uses cotton fiber as the basic skeleton and has excellent moisture absorption and softness. During use, it can absorb the sweat excreted by the human body, maintaining a dry environment and providing high wearing comfort. The hindered amine groups polymerized in situ on its surface can effectively inhibit the generation of free radicals and remove existing free radicals, blocking oxidative stress, thereby achieving an antioxidant effect. Fabrics woven from this antioxidant cotton fiber are highly comfortable and have excellent anti-aging capabilities. Even after long-term wear or storage, the clothing will not be damaged due to oxidation, allowing for long-term storage and a long service life.

[0022] Furthermore, in step S1, the catalyst is pyridine.

[0023] Further, in step S2, the initiator is any one of azobisisobutyronitrile, azobisisoheptane, and azobiscyclohexylmethane.

[0024] A comfortable antibacterial fabric is prepared by any of the above methods.

[0025] The beneficial effects of this invention are:

[0026] This invention involves preparing an antibacterial and softening compound that participates in the spinning process of spandex fibers. This results in spandex fibers with excellent softness and good antibacterial properties. Furthermore, the antibacterial substances do not leach out even after prolonged use, providing a long-lasting antibacterial effect. Additionally, cotton fibers are modified to possess not only excellent moisture absorption but also long-lasting antioxidant properties. The fabric prepared by blending these two fibers exhibits high softness, strong moisture absorption, good wearing comfort, and additional excellent antibacterial and antioxidant capabilities, resulting in a long service life.

[0027] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The infrared spectrum of the amino-terminated silicone oil and antibacterial softening compound in Example 1 of this invention;

[0030] Figure 2 The infrared spectra of the alkenylated cotton fiber and the antioxidant cotton fiber in Example 1 of the present invention are shown. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] I. Preparation of Polyurethane

[0034] Mix 8 mL of toluene diisocyanate and 6 mL of polytetrahydrofuran ether diol evenly, purge with nitrogen, add 0.6 g of dibutyltin dilaurate, heat to 50 °C and react for 1 h, add 2 mL of ethylene glycol, heat to 75 °C and react for 5 h, cool to 40 °C, add 1 mL of triethylamine and react for 1 h, then add 30 mL of deionized water, stir at 300 r / min for 3 h, and after natural defoaming, obtain polyurethane.

[0035] II. Preparation of Antibacterial Softening Complex

[0036] 2 ml of amino-terminated silicone oil with a viscosity of 10000 mPa·s was placed in 30 ml of anhydrous ethanol, and 1.5 g of curcumin was added. The mixture was reacted at room temperature for 24 h, and then distilled under reduced pressure to obtain an antibacterial and softening complex.

[0037] The infrared spectra of terminal amino silicone oil and antibacterial softening compound were measured using a B IO-RADFTS Fourier transform infrared spectrometer. Figure 1 It can be seen that in amino-terminated silicone oil, 3478cm -1 The absorption peak at 1050 cm⁻¹ represents the nitrogen-hydrogen bond in an amino group. -1 The absorption peak at 3285 cm⁻¹ represents the silicon-oxygen-silicon bond; in the infrared spectrum of the antibacterial softening compound, the peak is at 3285 cm⁻¹. -1 The absorption peak at 3076 cm⁻¹ represents the hydroxyl group. -1 The absorption peak at 1578 cm⁻¹ represents the carbon-hydrogen bond in a carbon-carbon double bond. -1 The peak at this point represents the absorption peak of the carbon-nitrogen double bond, indicating that the terminal amino silicone oil reacted with curcumin.

[0038] III. Preparation of Antioxidant Cotton Fibers

[0039] S1: Place 3g of cotton fiber in 50ml of dichloromethane, place in an ice bath at 0-4℃, add 2.5g of 3-bromopropene and 0.2g of pyridine, stir for 1h, then raise to room temperature and react for 15h. After filtration, washing and drying, alkenylated cotton fiber is obtained.

[0040] S2: Place 3g of alkenylated cotton fiber in 80ml of deionized water, add 2g of 2-methyl-2-acrylate-2,2,6,6-tetramethyl-4-piperidinyl ester, stir for 0.5h, then add 0.5g of azobisisobutyronitrile, heat to 50℃ and react for 3h, cool to room temperature, filter, wash and dry to obtain antioxidant cotton fiber.

[0041] The infrared spectra of alkenylated cotton fibers and antioxidant cotton fibers were measured using a B IO-RADFTS Fourier transform infrared spectrometer. Figure 2 It can be seen that in the infrared spectrum of alkenylated cotton fibers, at 3056 cm⁻¹... -1 The absorption peak at 3056 cm⁻¹ represents the carbon-hydrogen bond in the alkenyl group; in the infrared spectrum of antioxidant cotton fibers, 3056 cm⁻¹ is the peak value. -1 The absorption peak of the C-H bond in the alkenyl group basically disappears, at 3434 cm⁻¹. -1 The presence of an absorption peak in the nitrogen-hydrogen bond of the imine group indicates that the alkenylated cotton fiber reacted with 2-methyl-2-acrylate-2,2,6,6-tetramethyl-4-piperidinyl ester.

[0042] IV. Fabric Preparation

[0043] Step 1: Place 15 ml of polyurethane in 80 ml of N,N-dimethylacetamide, add 5 ml of antibacterial softening compound, and mix thoroughly to obtain the spinning solution.

[0044] Step 2: Control the flow rate of the spinning solution to 0.4 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0045] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0046] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0047] Example 2

[0048] Fabric preparation

[0049] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide, add 6 ml of antibacterial softening compound, and mix thoroughly to obtain the spinning solution.

[0050] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0051] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0052] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0053] The preparation methods of polyurethane, antibacterial softening compound and antioxidant cotton fiber are the same as in Example 1.

[0054] Example 3

[0055] Fabric preparation

[0056] Step 1: Place 25 ml of polyurethane in 120 ml of N,N-dimethylacetamide, add 8 ml of antibacterial softening compound, and mix thoroughly to obtain the spinning solution.

[0057] Step 2: Control the flow rate of the spinning solution to 0.8 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0058] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0059] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0060] The preparation methods of polyurethane, antibacterial softening compound and antioxidant cotton fiber are the same as in Example 1.

[0061] Comparative Example 1

[0062] Fabric preparation

[0063] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide and mix thoroughly to obtain the spinning solution.

[0064] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0065] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0066] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0067] The preparation methods for polyurethane and antioxidant cotton fibers are the same as in Example 1.

[0068] Comparative Example 2

[0069] Fabric preparation

[0070] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide, add 6 ml of antibacterial softening compound, and mix thoroughly to obtain the spinning solution.

[0071] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0072] Step 3: Using spandex fibers as warp and weft threads, weave them into fabric using a warp and weft knitting method;

[0073] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0074] The preparation method of polyurethane and antibacterial softening compound is the same as that in Example 1.

[0075] Comparative Example 3

[0076] Fabric preparation

[0077] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide and mix thoroughly to obtain the spinning solution.

[0078] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0079] Step 3: Using spandex fibers as warp and weft threads, weave them into fabric using a warp and weft knitting method;

[0080] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0081] The preparation method of polyurethane is the same as that in Example 1.

[0082] Comparative Example 4

[0083] Fabric preparation

[0084] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide, add 6 ml of amino silicone oil, and mix thoroughly to obtain the spinning solution.

[0085] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0086] Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0087] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0088] The preparation methods for polyurethane and antioxidant cotton fibers are the same as in Example 1.

[0089] Comparative Example 5

[0090] Fabric preparation

[0091] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide, add 6 ml of antibacterial softening compound, and mix thoroughly to obtain the spinning solution.

[0092] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0093] Step 3: Using spandex fibers as warp and cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0094] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0095] The preparation method of polyurethane and antibacterial softening compound is the same as that in Example 1.

[0096] Comparative Example 6

[0097] Step 1: Place 20 ml of polyurethane in 100 ml of N,N-dimethylacetamide, add 6 ml of amino-terminated silicone oil, and mix thoroughly to obtain the spinning solution.

[0098] Step 2: Control the flow rate of the spinning solution to 0.6 ml / h and carry out wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber.

[0099] Step 3: Using spandex fibers as warp and cotton fibers as weft, weave the fabric using a warp and weft knitting method.

[0100] Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

[0101] The preparation method of polyurethane is the same as that in Example 1.

[0102] Performance testing

[0103] The fabrics prepared in Examples 1-3 and Comparative Examples 1-6 were cut into samples conforming to specifications. The softness of the samples was tested using an M508 fabric softness tester at a sample holder oscillation speed of 2π / min. The moisture absorption properties of the samples were tested according to standard GB / T12704.1-2009. The samples were also tested according to standard GB / T14337-2022 under ultraviolet light at a wavelength of 313 nm and an irradiance of 0.72 / m². 2 The samples were irradiated in a UV aging chamber for 48 hours, and tensile properties were tested to determine their anti-aging ability. Antibacterial properties were tested according to standard GB / T20944.3-2008. Specific test results are shown in the table below:

[0104]

[0105] As shown in the table above, the samples prepared in Examples 1-3 exhibit excellent softness and moisture absorption, as well as excellent antibacterial and anti-aging properties. The sample prepared in Comparative Example 1, without the addition of an antibacterial softening compound, has moderate softness and almost no antibacterial properties, but good moisture absorption. The addition of antioxidant cotton fibers contributes to its good anti-aging ability. The sample prepared in Comparative Example 2, without the addition of antioxidant cotton fibers, has poor moisture absorption and anti-aging properties, but the addition of an antibacterial softening compound results in excellent antibacterial performance and good softness. The sample prepared in Comparative Example 3, without the addition of either antioxidant cotton fibers or an antibacterial softening compound, exhibits poor performance in terms of softness, moisture absorption, antibacterial properties, and antioxidant properties. The results were at a relatively poor level. The sample prepared in Comparative Example 4, which directly incorporated terminal amino silicone oil and antioxidant cotton fibers, exhibited good softness, strong moisture absorption, and good anti-aging ability, but very poor antibacterial ability. The sample prepared in Comparative Example 5, which incorporated an antibacterial and softening composition and directly used unmodified cotton fibers, showed excellent antibacterial performance, good softness and moisture absorption, but poor anti-aging ability. The sample prepared in Comparative Example 6, which directly incorporated terminal amino silicone oil into the preparation of spandex fibers, and then used cotton fibers as weft and silicone-containing spandex fibers as warp fibers for spinning, resulted in a sample with good softness and moisture absorption, high wearing comfort, but poor antibacterial and anti-aging ability, short service life, and no ability to be stored for a long time.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the inventive concept, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a comfortable antibacterial fabric, characterized in that, The preparation steps include the following: Step 1: Place polyurethane in N,N-dimethylacetamide, add antibacterial softening compound, and mix thoroughly to obtain spinning solution; Step 2: Control the flow rate of the spinning solution and perform wet spinning. After the spinning solution passes through the spinneret, it is added to the coagulation bath of distilled water, and then stretched, dried and wound to obtain spandex fiber. Step 3: Using spandex fibers as warp and antioxidant cotton fibers as weft, weave the fabric using a warp and weft knitting method. Step 4: Trim the raw edges and smooth out the wrinkles of the woven fabric to obtain the finished product.

2. The method for preparing a comfortable antibacterial fabric according to claim 1, characterized in that, The polyurethane is polymerized from toluene diisocyanate and polytetrahydrofuran ether diol.

3. The method for preparing a comfortable antibacterial fabric according to claim 1, characterized in that, In step two, the flow rate of the spinning solution is 0.4-0.8 ml / h.

4. The method for preparing a comfortable antibacterial fabric according to claim 1, characterized in that, The method for preparing the antibacterial softening compound is as follows: Amino-terminated silicone oil was placed in anhydrous ethanol, curcumin was added, and the mixture was reacted at room temperature for 24-48 hours. After vacuum distillation, an antibacterial and compliant complex was obtained.

5. The method for preparing a comfortable antibacterial fabric according to claim 4, characterized in that, The viscosity of the amino-terminated silicone oil is 10000-15000 mPa·s.

6. The method for preparing a comfortable antibacterial fabric according to claim 1, characterized in that, The method for preparing the antioxidant cotton fiber includes the following steps: S1: Place cotton fibers in dichloromethane, place them in an ice bath at 0-4℃, add 3-bromopropene and catalyst, stir for 1-2 hours, then raise the temperature to room temperature and react for 15-20 hours. After filtration, washing and drying, alkenylated cotton fibers are obtained. S2: Place the alkenylated cotton fiber in deionized water, add 2-methyl-2-acrylate-2,2,6,6-tetramethyl-4-piperidinyl ester, stir for 0.5-1h, then add the initiator, heat to 50-60℃ and react for 3-5h, cool to room temperature, filter, wash and dry to obtain antioxidant cotton fiber.

7. The method for preparing a comfortable antibacterial fabric according to claim 6, characterized in that, In step S1, the catalyst is pyridine.

8. The method for preparing a comfortable antibacterial fabric according to claim 6, characterized in that, In step S2, the initiator is any one of azobisisobutyronitrile, azobisisoheptane, and azobiscyclohexylmethane.

9. A comfortable antibacterial fabric, characterized in that, It is prepared by the preparation method according to any one of claims 1-8.

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