Composite textile fabric with antibacterial and deodorant functions and preparation method thereof

Abstract

The present application relates to the technical field of textiles, and particularly relates to a composite textile fabric with antibacterial and deodorant functions and a preparation method thereof.The preparation method of the fabric comprises the following steps: uniformly mixing cotton fibers, lyocell fibers, hemp fibers and bamboo fibers, and then processing the mixture into blended yarn; weaving the blended yarn into a grey cloth, and then sequentially performing the following steps: scouring, mercerizing, dyeing, setting, and preshrinking to obtain a premix cloth; adding the premix cloth into an antibacterial solution and stirring, then drying, and finally performing singeing and etching to obtain the composite textile fabric with antibacterial and deodorant functions; the antibacterial solution is a mixed solution of rosemary alcohol-soluble extract and chitosan.The present application realizes the synergistic effect of the natural antibacterial components of bamboo fibers and the rosemary alcohol-soluble extract-chitosan antibacterial solution, and the antibacterial rate of the fabric against bacteria such as escherichia coli and staphylococcus aureus is still kept above 95% after 50 times of soaping, which is significantly improved compared with the antibacterial performance of traditional single coating fabric.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a composite textile fabric with antibacterial and deodorizing functions and its preparation method. Background Technology

[0002] With increasing consumer demand for health and comfort, antibacterial and odor-resistant textiles are being used more and more widely in clothing, home textiles, and other fields. Currently, antibacterial fabrics are often prepared using chemically synthesized antibacterial agent coatings (such as quaternary ammonium salts and metal nanoparticles) or natural fiber blends (such as hemp and bamboo fiber). However, these fabrics generally suffer from a key drawback: their antibacterial properties significantly decrease after repeated washing.

[0003] Traditional chemical antibacterial agents rely on coatings adhering to the fiber surface. Their bonding with the fiber is primarily physical adsorption or weak chemical bonds, which are easily detached during repeated washing due to mechanical friction and the action of chemical solvents, leading to the loss of antibacterial components. For example, patent CN114934383B achieves antibacterial properties through chemically synthesized components in a hand-feeling additive, but tests show that the antibacterial rate decreases by approximately 1-3% after washing, making it difficult to maintain long-term effectiveness. On the other hand, simply increasing the blending ratio of natural antibacterial fibers (such as hemp) can improve durability, but may result in a rougher fabric feel, increased processing costs, and the easy decomposition of natural antibacterial components (such as cannabinoids) during high-temperature dyeing and finishing processes, further weakening the antibacterial durability. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a composite textile fabric with antibacterial and deodorizing functions and its preparation method. This invention utilizes the synergistic effect of natural antibacterial components of bamboo fiber and an antibacterial solution of rosemary alcohol-soluble extract-chitosan. After 50 washes, the fabric maintains an antibacterial rate of over 95% against bacteria such as Escherichia coli and Staphylococcus aureus, which is significantly improved compared to traditional single-coated fabrics.

[0005] To this end, the present invention provides the following technical solution.

[0006] In a first aspect, the present invention provides, in an optional embodiment, a method for preparing a composite textile fabric with antibacterial and deodorizing functions, comprising the following steps:

[0007] S1: Cotton fiber, lyocell fiber, hemp fiber and bamboo fiber are mixed evenly and processed into blended yarn;

[0008] S2: The blended yarn is woven into a greige fabric, and then subjected to boiling, mercerizing, dyeing, setting, and pre-shrinking processes in sequence to obtain a pre-blended fabric;

[0009] S3: Add the premixed fabric to the antibacterial solution and stir, then dry, and finally singe and etch to obtain a composite textile fabric with antibacterial and deodorizing functions.

[0010] The antibacterial solution is a mixed solution of rosemary alcohol-soluble extract and chitosan.

[0011] This invention incorporates 0.5-1% by mass of bamboo fiber into a fiber matrix. The naturally occurring bamboo kun in bamboo fiber exhibits broad-spectrum inhibitory effects against Escherichia coli and Staphylococcus aureus. Furthermore, the porous structure and surface hydroxyl groups (-OH) of bamboo fiber serve as physical adsorption sites, increasing the adhesion area of ​​rosemary alcohol-soluble extract and chitosan on the fiber surface. Simultaneously, the addition of bamboo fiber improves the hydrophilicity of the blended fiber, allowing antibacterial solutions to penetrate more easily into the fiber interior, forming a composite structure of a "natural fiber antibacterial core layer + coated antibacterial outer layer."

[0012] In addition, chitosan molecules contain amino groups (-NH2), which protonate in aqueous acetic acid to form positively charged -NH3. + It can bind to the hydroxyl groups on the fiber surface through hydrogen and ionic bonds, and simultaneously form covalent cross-links with the polyphenolic hydroxyl groups (-OH) and carboxyl groups (-COOH) in rosemary extract, forming a dense, elastic film on the fiber surface. This film resists mechanical forces during washing, reducing the loss of antibacterial components. The rosmarinic acid, caryopsisic acid, and other polyphenolic components in the alcohol-soluble rosemary extract have strong antibacterial activity. Their hydrophobic groups are embedded inside the chitosan membrane, while the hydrophilic groups are exposed on the membrane surface, forming a "core-shell" slow-release structure. During washing, the antibacterial components on the membrane surface are slowly released, while the internal components are protected by chitosan and are not easily lost, ensuring continuous antibacterial effects even after multiple washes.

[0013] Preferably, in the antibacterial solution, the concentration of the rosemary alcohol-soluble extract is 0.5-1.5%; and / or, the concentration of the chitosan is 1-2%. The solvent of the antibacterial solution is an aqueous acetic acid solution; and / or, the pH value of the antibacterial solution is 4-5.

[0014] In this invention, the pH of the antibacterial solution is controlled at 4-5, which ensures the full dissolution of chitosan while preventing the oxidative decomposition of rosmarinic acid in the alkaline washing solution. This acidic environment also promotes the activation of hydroxyl groups on the fiber surface, enhances the chemical bonding with chitosan, and further improves the coating durability.

[0015] Furthermore, the method for preparing the antibacterial solution includes the following steps:

[0016] Chitosan was added to an aqueous acetic acid solution and stirred until dissolved to obtain a chitosan solution. Then, the ethanol-soluble extract of rosemary was dissolved in ethanol and slowly added dropwise to the chitosan solution while stirring to obtain an antibacterial solution.

[0017] Preferably, the mass ratio of cotton fiber, lyocell fiber, hemp fiber and bamboo fiber is 60-65:20-25:5-10:0.5-1.

[0018] Preferably, in step S3, the stirring time is 30-50 min; and / or, the drying temperature is 40-50℃ and the time is 5-8 min. In step S2, the simmering time is 3-4 h; and / or, the simmering temperature is 110-120℃. The mercerizing time is 18-25 s; and / or, the setting temperature is 140-160℃. The dyeing uses reactive dyes; the reactive dye is selected from reactive yellow, reactive red, or reactive blue.

[0019] Secondly, in optional embodiments, the present invention provides a composite textile fabric with antibacterial and deodorizing functions prepared by the above-described preparation method.

[0020] Compared with the prior art, the present invention has one of the following beneficial effects:

[0021] 1. This invention utilizes the synergistic effect of natural antibacterial components in bamboo fiber and the antibacterial solution of rosemary alcohol-soluble extract-chitosan. After 50 washes, the fabric still maintains an antibacterial rate of over 95% against bacteria such as Escherichia coli and Staphylococcus aureus, which is significantly improved compared to the antibacterial performance of traditional single-coated fabrics.

[0022] 2. The bamboo fiber, rosemary, and chitosan in the composite textile fabric provided by this invention are all naturally sourced, avoiding the potential toxicity risks of chemically synthesized antibacterial agents. Furthermore, chitosan is biodegradable, meeting environmental protection requirements. Simultaneously, the addition of bamboo fiber reduces the amount of chemical antibacterial agents used, lowering the risk of skin irritation.

[0023] 3. The chitosan in the composite textile fabric provided by this invention can improve the stiffness of hemp fiber after film formation, and the softness of bamboo fiber further enhances the skin-friendliness of the fabric; while the addition of rosemary extract does not increase the coating thickness, ensuring that the fabric maintains its original drape and smoothness, achieving a balance of "function-feel-durability". Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] In the following examples and comparative examples, cotton fiber had a length of 23-30 mm and a fineness of 1.8 dtex; lyocell fiber had a length of 32-38 mm and a fineness of 1.3 dtex; hemp fiber had a length of 28-33 mm and a fineness of 1.8 dtex; bamboo fiber had a length of 35-40 mm and a fineness of 1.5 dtex; the dye was Reactive Yellow, purchased from Shanghai Jizhi Biochemical Technology Co., Ltd., model Reactive Yellow 145. All other unmentioned raw materials were commonly used and of industrial grade or higher.

[0026] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0027] Example 1

[0028] This embodiment provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0029] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 5.

[0030] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0031] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0032] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0033] Example 2

[0034] This embodiment provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0035] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 5.

[0036] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:1. After being mixed evenly, they are processed through carding, drawing, roving and spinning to produce 16S blended yarn.

[0037] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0038] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0039] Example 3

[0040] This embodiment provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0041] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 5.

[0042] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.8, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0043] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0044] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0045] Comparative Example 1

[0046] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0047] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 5.

[0048] S2: Fiber cotton, lyocell fiber, and hemp fiber are fed into a loosening machine in a mass ratio of 60:25:10.5, mixed evenly, and then processed through carding, drawing, roving, and spinning to produce 16S blended yarn;

[0049] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0050] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0051] Comparative Example 2

[0052] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0053] S1: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0054] S2: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0055] S3: Dry the premixed fabric in hot air at 45℃ for 6 minutes, and then singe and etch the fibers in sequence to obtain the composite textile fabric.

[0056] Comparative Example 3

[0057] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0058] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, thus obtaining a chitosan solution;

[0059] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0060] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0061] S4: The premixed fabric is added to the chitosan solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0062] Comparative Example 4

[0063] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0064] S1: Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5) to obtain a ethanol-soluble extract solution of rosemary.

[0065] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0066] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0067] S4: The premixed fabric is added to the rosemary alcohol-soluble extract solution, stirred at 40°C for 40 min, and then dried with hot air at 45°C for 6 min. The singeing and etching processes are performed sequentially to obtain the composite textile fabric.

[0068] Comparative Example 5

[0069] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0070] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 6.

[0071] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0072] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0073] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0074] Comparative Example 6

[0075] This comparative example provides a method for preparing a composite textile fabric with antibacterial and deodorizing functions, including the following steps:

[0076] S1: Add chitosan to an aqueous acetic acid solution and stir for 1 hour to dissolve it, obtaining a chitosan solution. Dissolve the ethanol-soluble extract of rosemary in ethanol (the mass ratio of extract to ethanol is 1:5), and then slowly add it dropwise to the chitosan solution while stirring at 800 rpm to obtain an antibacterial solution. The concentration of chitosan in the antibacterial solution is 1.5%, the concentration of the ethanol-soluble extract of rosemary is 1%, and the pH value is 3.

[0077] S2: Fiber cotton, lyocell fiber, hemp fiber and bamboo fiber are fed into the loosening machine in a mass ratio of 60:25:10:0.5, mixed evenly, and then processed through carding, drawing, roving and spinning to produce 16S blended yarn;

[0078] S3: The blended yarn is woven into a plain weave fabric (200g / m²) using an air-jet loom. 2 Then, the greige fabric is immersed in a 2% NaOH aqueous solution at 110℃ and sealed for boiling for 3 hours. After boiling, the greige fabric is cleaned with water. Then, it is mercerized with a 25% NaOH solution under no tension for 20 seconds. The mercerized greige fabric is placed in a dyeing vat (the ratio of dye to water is controlled at 1:10) and dyed at 55℃ for 35 minutes. Then, a soda ash solution is slowly added to the dyeing vat to adjust the pH value of the dyeing solution to 10. The amount of soda ash added is 5g / L. After adding soda ash, the dyeing continues for 25 minutes. After dyeing, the greige fabric is cleaned with water. Finally, it is heat-set at 150℃ for 30 seconds and then processed by a pre-shrinking machine. The pre-shrinking rate is ≤3%, and a premixed fabric is obtained.

[0079] S4: The premixed fabric is put into the antibacterial solution and stirred at 40°C for 40 minutes. Then it is dried with hot air at 45°C for 6 minutes. The singeing and etching processes are performed in sequence to obtain the composite textile fabric.

[0080] Experimental Example

[0081] The antibacterial properties of the composite textile fabrics obtained in Examples 1-3 and Comparative Examples 1-6 were tested using the following methods:

[0082] Escherichia coli AATCC 8099, Candida albicans AATCC 10231, and Staphylococcus aureus AATCC 6538 were used as test strains. The composite textile fabrics of Examples 1-3 and Comparative Examples 1-6 were sandwiched between two 40mm × 100mm monofiber lining cotton fabrics. A soap solution was prepared by mixing 5g of soap with one liter of water. The soap solution was transferred to a washing container, and the prepared samples were placed into the washing container. The washing apparatus was preheated, the liquor ratio was set to 50:1, and the solution temperature was maintained at a constant temperature of 60±2℃. The samples were then washed by rinsing for 30 minutes.

[0083] After the experiment, the samples were removed, washed with clean water, excess water was squeezed out, and the samples were dried to obtain washed samples. The three bacterial strains were then prepared in a sterile environment at a concentration of 3 × 10⁶. 5 CFU / mL bacterial culture medium was prepared. 4g of each of the pre- and post-wash examples and comparative samples were weighed out, and the samples were cut into approximately 5×5mm pieces and placed in the corresponding bacterial culture medium. The bacterial culture medium without the sample was used as a control group. The broth was placed in a shaker at 37℃ and 150rpm / min and incubated for 24h. 100μL was spread onto an agar plate. After 4h of incubation, the bacterial count on the plate was recorded using the plate count method. The test results for each sample were recorded after one wash and after 50 washes. The test results are shown in Tables 1 and 2. The antibacterial rate of the fabric can be calculated using the following formula: R = (BA) / B × 100%, where R represents the antibacterial rate, and A and B are the bacterial concentrations of the sample and control group, respectively.

[0084] Table 1. Antibacterial performance results after one wash.

[0085]

[0086]

[0087] Table 2. Antibacterial performance results after 50 washes.

[0088]

[0089]

[0090] Conclusions: Comparison of data from Example 1 and Comparative Example 1 shows that the lack of bamboo fiber leads to a significant decrease in the long-term antibacterial properties of the fabric, especially a significant reduction in wash resistance; comparison of data from Example 1 and Comparative Example 2 shows that the lack of antibacterial solution results in the fabric having virtually no antibacterial and deodorizing functions; comparison of data from Example 1 and Comparative Examples 3-4 shows that rosemary alcohol-soluble extract and chitosan have a synergistic antibacterial effect; comparison of data from Example 1 and Comparative Examples 5-6 shows that if the pH value of the antibacterial solution is not within the range of 4-5, it will reduce the fabric's antibacterial properties. The antibacterial effect is due to the fact that at pH=6, the degree of amino protonation of chitosan decreases, and hydrogen bonds between molecular chains reform, leading to the precipitation of some chitosan and defects in the coating. At the same time, the stability of rosmarinic acid decreases under weakly acidic conditions, and its antioxidant capacity weakens. At pH=3, chitosan is over-protonated, and the molecular chains are highly extended, resulting in a loose and porous coating with poor mechanical strength. Meanwhile, under strong acidic conditions, the ester bonds of rosmarinic acid hydrolyze, and the effective ingredients are lost. In addition, strong acids can damage the natural antibacterial components of hemp / bamboo fibers, weakening the antibacterial ability of the fiber core.

[0091] Although the principles of the present invention have been described in detail above with reference to preferred embodiments, those skilled in the art should understand that the above embodiments are merely illustrative explanations of the implementation of the present invention and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Any obvious changes, such as equivalent transformations or simple substitutions, based on the technical solutions of the present invention without departing from the spirit and scope of the present invention fall within the protection scope of the present invention.

Claims

1. A method for preparing a composite textile fabric with antibacterial and deodorizing functions, characterized in that, Includes the following steps: S1: Cotton fiber, lyocell fiber, hemp fiber and bamboo fiber are mixed evenly and then processed into blended yarn; S2: The blended yarn is woven into a greige fabric, and then subjected to boiling, mercerizing, dyeing, setting, and pre-shrinking processes in sequence to obtain a pre-blended fabric; S3: Add the premixed fabric to the antibacterial solution and stir, then dry, and finally singe and etch to obtain a composite textile fabric with antibacterial and deodorizing functions. The antibacterial solution is a mixed solution of rosemary alcohol-soluble extract and chitosan; The solvent of the antibacterial solution is an aqueous solution of acetic acid, and the pH value of the antibacterial solution is 4-5; The mass ratio of cotton fiber, lyocell fiber, hemp fiber and bamboo fiber is 60-65:20-25:5-10:0.5-1.

2. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, In the antibacterial solution, the concentration of the rosemary alcohol-soluble extract is 0.5-1.5%; and / or, The concentration of chitosan is 1-2%.

3. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, The method for preparing the antibacterial solution includes the following steps: Chitosan was added to an aqueous acetic acid solution and stirred until dissolved to obtain a chitosan solution. Then, the ethanol-soluble extract of rosemary was dissolved in ethanol and slowly added dropwise to the chitosan solution while stirring to obtain an antibacterial solution.

4. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, In step S3, the stirring time is 30-50 minutes; and / or, The drying temperature is 40-50℃ and the time is 5-8 minutes.

5. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, In step S2, the boiling time of the cloth is 3-4 hours; and / or, The temperature for boiling the cloth is 110-120℃.

6. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, In step S2, the mercerizing time is 18-25 seconds; and / or, The shaping temperature is 140-160℃.

7. The method for preparing the composite textile fabric with antibacterial and deodorizing functions according to claim 1, characterized in that, In step S2, the dyeing process uses reactive dyes; The reactive dye is one of reactive yellow, reactive red, or reactive blue.

8. A composite textile fabric with antibacterial and deodorizing functions prepared by the preparation method according to any one of claims 1-7.

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