Preparation method of bio-based antibacterial elastic functional braid
By combining hemp nanocellulose, natural rubber, and sodium alginate, and utilizing the antibacterial properties of silver nitrate and the elasticity of natural rubber, a bio-based antibacterial elastic functional webbing was prepared. This solved the problems of traditional webbing being environmentally unfriendly and lacking elasticity, and achieved the preparation of high-performance, green and environmentally friendly webbing.
Patent Information
- Application Number
- CN202511497977.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2025-12-23
AI Technical Summary
Existing technologies struggle to effectively combine bio-based materials with antibacterial and elastic functions, and the technology for preparing high-performance webbing still needs further development. Traditional webbing suffers from environmental unfriendliness and insufficient elasticity.
Using hemp nanocellulose, natural rubber, and sodium alginate as the main materials, a bio-based antibacterial elastic functional webbing is prepared through spinning technology. The fabric is prepared by combining the broad-spectrum antibacterial properties of silver nitrate and the elasticity of natural rubber with wet spinning and traditional textile processes.
The prepared webbing has excellent antibacterial properties and good elasticity, which can effectively inhibit the growth of various pathogens, meet green and environmental protection requirements, and satisfy the high-performance requirements of sportswear.
Smart Images
Figure CN121183451A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for preparing a bio-based antibacterial elastic functional webbing, belonging to the field of textile materials technology. Background Technology
[0002] With the improvement of people's living standards, the functional requirements for textiles are increasing. The use of antibacterial, elastic, and bio-based materials has become an important research direction in the textile field. Traditional antibacterial webbing often uses chemically synthesized antibacterial agents, which have problems such as being environmentally unfriendly and easily causing skin allergies. At the same time, the elasticity of ordinary webbing is insufficient to meet the needs of the human body in various scenarios such as sports. Due to their renewable and degradable characteristics, bio-based materials are gradually becoming a research hotspot to replace traditional petroleum-based materials. However, the technology for effectively combining bio-based materials with antibacterial and elastic functions to prepare high-performance webbing still needs further development. Hemp nanocellulose has high strength, high modulus, and good biocompatibility; natural rubber has excellent elasticity; sodium alginate has good film-forming properties, biodegradability, and certain antibacterial properties; silver ions in silver nitrate have broad-spectrum antibacterial properties. By rationally combining these materials and using spinning technology, a bio-based antibacterial elastic functional webbing with excellent comprehensive performance can be prepared. Summary of the Invention
[0003] To address the problems existing in the prior art, the present invention provides a method for preparing a bio-based antibacterial elastic functional webbing. This webbing has good antibacterial properties, excellent elasticity, and environmentally friendly characteristics based on bio-based materials, thereby meeting the market demand for high-performance, green textiles in sportswear.
[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a method for preparing a bio-based antibacterial elastic functional webbing, comprising the following steps: Step 1: Raw material preparation Preparation of hemp nanocellulose: Select high-quality hemp fiber, remove impurities after pretreatment, and prepare hemp fiber into nanocellulose by chemical mechanical method or enzymatic hydrolysis method; Preparation of natural rubber latex: Natural rubber latex is separated from natural rubber tree latex by centrifugation, and the latex concentration is adjusted to 20-30% for later use; Preparation of sodium alginate solution: Slowly add sodium alginate to deionized water, and heat to 50-60℃ while stirring at 300-500 rpm until the sodium alginate is completely dissolved, thus preparing a sodium alginate solution with a mass fraction of 3-5%. Preparation of silver nitrate solution: Weigh an appropriate amount of silver nitrate, dissolve it in deionized water, and prepare a silver nitrate solution with a concentration of 0.1-0.5 mol / L; Step 2: Preparation of spinning solution Hemp nanocellulose suspension, natural rubber latex, and sodium alginate solution were mixed in a mass ratio of (3-5):(2-4):(1-3) and stirred evenly at a stirring speed of 500-800 rpm to obtain a mixed solution. A mixed solution is obtained; Add silver nitrate solution dropwise to the above mixed solution. The amount of silver nitrate solution added is 0.5-2% of the total mass of the mixed solution. Stir while adding the solution dropwise for 30-60 minutes to form a spinning solution. Step 3: Spinning process The spinning process employs a wet spinning method, where the spinning solution is extruded through a spinneret with an orifice diameter of 0.1-0.3 mm and an extrusion speed of 1-3 mL / min, before entering a coagulation bath. The coagulation bath is an ethanol solution containing 5-10% calcium chloride by mass, and the temperature is controlled at 20-30℃. The spinning solution coagulates and forms nascent fibers in the coagulation bath. The nascent fibers are stretched to a ratio of 2-4 times and a stretching speed of 10-20 m / min, and then dried in an oven at a temperature of 60-80℃ for 2-4 hours to obtain dried fibers. Step 4: Preparation of the webbing Dry fibers are processed into fabrics using traditional textile processes, such as knitting or weaving. Knitting parameters are: knitting machine speed 20-30 rpm, needle pitch 1-2 mm; weaving parameters are: warp density 50-80 yarns / cm, weft density 40-60 yarns / cm. The prepared fabric undergoes finishing treatments, including washing and softening. Deionized water is used for washing at 30-40℃ for 10-20 minutes. For softening, a 1-3% (w / w) silicone softener solution is used to soak the fabric at 40-50℃ for 15-20 minutes, followed by drying at 60-70℃, resulting in a bio-based antibacterial elastic functional webbing.
[0005] Furthermore, in step 1, hemp fibers are soaked in a 3-5% sodium hydroxide solution and stirred at 60-80°C for 2-3 hours. Then, they are repeatedly rinsed with deionized water until neutral. Next, 1-2% (w / w) of cellulase is added, and the enzymatic hydrolysis reaction is carried out at a pH of 4.5-5.5 and a temperature of 45-55°C for 4-6 hours. Finally, hemp nanocellulose suspension is obtained by high-speed centrifugation and ultrasonic dispersion.
[0006] The beneficial effects of this invention are: excellent antibacterial properties: due to the broad-spectrum antibacterial properties of silver nitrate ions, it can effectively inhibit the growth and reproduction of various bacteria, fungi, and viruses. Simultaneously, sodium alginate itself also possesses certain antibacterial properties; the synergistic effect of both results in the prepared fabric achieving an antibacterial rate of over 99% against common pathogens such as Escherichia coli and Staphylococcus aureus. Excellent elasticity: Natural rubber gives the fabric excellent elasticity, enabling it to adapt to the deformation needs of the human body in different states such as exercise. Tests have shown that the elastic recovery rate of the fabric reaches more than 85%. Bio-based environmentally friendly materials: Hemp nanocellulose, natural rubber and sodium alginate are all bio-based materials with renewable and degradable properties, which reduce environmental pollution and are in line with the concept of green and environmentally friendly development.
[0007] Excellent mechanical properties: The addition of hemp nanocellulose improves the strength and modulus of the fabric, giving it good abrasion resistance and durability, meeting the needs of daily use. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of a scanning electron microscope image of spinning in Embodiment 5 of the present invention. Detailed Implementation
[0009] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.
[0010] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.
[0011] Example 1 Raw material preparation Preparation of hemp nanocellulose: 100g of hemp fiber was soaked in 3000mL of 3% sodium hydroxide solution and stirred at 60℃ for 3 hours. The solution was then repeatedly rinsed with deionized water until neutral. 3g of cellulase (1% by mass) was added, and the enzymatic hydrolysis reaction was carried out at pH 4.5 and 45℃ for 6 hours. The hemp nanocellulose suspension was obtained by high-speed centrifugation and ultrasonic dispersion. Preparation of natural rubber latex: Separate the natural rubber latex from the natural rubber tree latex by centrifugation and adjust the concentration to 20%.
[0012] Preparation of sodium alginate solution: Slowly add 30g of sodium alginate to 1000mL of deionized water, and heat to 50℃ while stirring at 300 rpm until the sodium alginate is completely dissolved.
[0013] Preparation of spinning solution: 200g of hemp nanocellulose suspension, 150g of natural rubber latex, and 100g of sodium alginate solution were mixed and stirred until homogeneous at a stirring speed of 500 rpm. 10g of silver nitrate solution was added dropwise to the mixture while stirring for 30 minutes to form the spinning solution. Spinning process: Wet spinning was used with a spinneret orifice diameter of 0.1 mm and an extrusion speed of 1 mL / min. The fibers were then placed in a coagulation bath containing an ethanol solution with a mass fraction of 5% calcium chloride at a temperature of 20°C. The nascent fibers were stretched twice their original size at a stretching speed of 10 m / min and dried in an oven at 60°C for 4 hours. Preparation of the webbing: The fabric was prepared by knitting at a speed of 20 rpm and a needle pitch of 1 mm. The fabric was then washed at 30℃ for 20 minutes, followed by immersion in a 1% (w / w) silicone softener solution at 40℃ for 15 minutes, and finally dried at 60℃ to obtain a bio-based antibacterial elastic functional fabric. Testing showed that the fabric had an antibacterial rate of 20.2% against Escherichia coli and Staphylococcus aureus, and an elastic recovery rate of 86%.
[0014] Example 2 Raw material preparation Preparation of hemp nanocellulose: 100g of hemp fiber was soaked in 3000mL of 3% sodium hydroxide solution and stirred at 60℃ for 3 hours. The solution was then repeatedly rinsed with deionized water until neutral. 3g of cellulase (1% by mass) was added, and the enzymatic hydrolysis reaction was carried out at pH 4.5 and 45℃ for 6 hours. The hemp nanocellulose suspension was obtained by high-speed centrifugation and ultrasonic dispersion. Preparation of sodium alginate solution: Slowly add 30g of sodium alginate to 1000mL of deionized water, and heat to 50℃ while stirring at 300 rpm until the sodium alginate is completely dissolved. Preparation of silver nitrate solution: Weigh 5g of silver nitrate and dissolve it in 100mL of deionized water to prepare a 0.1mol / L silver nitrate solution.
[0015] Preparation of spinning solution: 200g of hemp nanocellulose suspension, 150g of natural rubber latex, and 100g of sodium alginate solution were mixed and stirred until homogeneous at a stirring speed of 500 rpm. 10g of silver nitrate solution was added dropwise to the mixture while stirring for 30 minutes to form the spinning solution. Spinning process: Wet spinning was used with a spinneret orifice diameter of 0.1 mm and an extrusion speed of 1 mL / min. The fibers were then placed in a coagulation bath containing an ethanol solution with a mass fraction of 5% calcium chloride at a temperature of 20°C. The nascent fibers were stretched twice their original size at a stretching speed of 10 m / min and dried in an oven at 60°C for 4 hours. Preparation of the webbing: The fabric was prepared by knitting at a speed of 20 rpm and a needle pitch of 1 mm. The fabric was then washed at 30℃ for 20 minutes, followed by immersion in a 1% (w / w) silicone softener solution at 40℃ for 15 minutes, and finally dried at 60℃ to obtain a bio-based antibacterial elastic functional fabric. Testing showed that the fabric exhibited an antibacterial rate of 99.2% against Escherichia coli and Staphylococcus aureus, and an elastic recovery rate of 5.1%.
[0016] Example 3 Raw material preparation Preparation of hemp nanocellulose: 100g of hemp fiber was soaked in 3000mL of 3% sodium hydroxide solution and stirred at 60℃ for 3 hours. The solution was then repeatedly rinsed with deionized water until neutral. 3g of cellulase (1% by mass) was added, and the enzymatic hydrolysis reaction was carried out at pH 4.5 and 45℃ for 6 hours. The hemp nanocellulose suspension was obtained by high-speed centrifugation and ultrasonic dispersion. Preparation of natural rubber latex: Separate the natural rubber latex from the natural rubber tree latex by centrifugation and adjust the concentration to 20%. Preparation of sodium alginate solution: Slowly add 30g of sodium alginate to 1000mL of deionized water, and heat to 50℃ while stirring at 300 rpm until the sodium alginate is completely dissolved. Preparation of silver nitrate solution: Weigh 5g of silver nitrate and dissolve it in 100mL of deionized water to prepare a silver nitrate solution with a concentration of 0.1mol / L. Preparation of spinning solution: 200g of hemp nanocellulose suspension, 150g of natural rubber latex, and 100g of sodium alginate solution were mixed and stirred until homogeneous at a stirring speed of 500 rpm. 10g of silver nitrate solution was added dropwise to the mixture while stirring for 30 minutes to form the spinning solution. Spinning process: Wet spinning was used with a spinneret orifice diameter of 0.1 mm and an extrusion speed of 1 mL / min. The fibers were then placed in a coagulation bath containing an ethanol solution with a mass fraction of 5% calcium chloride at a temperature of 20°C. The nascent fibers were stretched twice their original size at a stretching speed of 10 m / min and dried in an oven at 60°C for 4 hours. Preparation of the webbing: The fabric was prepared by knitting at a speed of 20 rpm and a needle pitch of 1 mm. The fabric was then washed at 30℃ for 20 minutes, followed by immersion in a 1% (w / w) silicone softener solution at 40℃ for 15 minutes, and finally dried at 60℃ to obtain a bio-based antibacterial elastic functional fabric. Testing showed that the fabric had an antibacterial rate of 99.2% against Escherichia coli and an elastic recovery rate of 86%. Example 4 Raw material preparation Preparation of hemp nanocellulose: 120g of hemp fiber was soaked in 3500mL of 4% sodium hydroxide solution and stirred at 70℃ for 2.5 hours. The solution was then repeatedly rinsed with deionized water until neutral. 4g of cellulase (1.5% by mass) was added, and the enzymatic hydrolysis reaction was carried out at pH 5 and 50℃ for 5 hours. The hemp nanocellulose suspension was obtained by high-speed centrifugation and ultrasonic dispersion. Preparation of natural rubber latex: Separate the natural rubber latex from the natural rubber tree latex by centrifugation and adjust the concentration to 25%. Preparation of sodium alginate solution: Slowly add 40g of sodium alginate to 1200mL of deionized water, and heat to 55℃ while stirring at 400 rpm until the sodium alginate is completely dissolved. Preparation of silver nitrate solution: Weigh 8g of silver nitrate and dissolve it in 150mL of deionized water to prepare a silver nitrate solution with a concentration of 0.3mol / L. Preparation of spinning solution: 250g of hemp nanocellulose suspension, 200g of natural rubber latex, and 150g of sodium alginate solution were mixed and stirred until homogeneous at a stirring speed of 600 rpm. 15g of silver nitrate solution was added dropwise to the mixture while stirring for 45 minutes to form the spinning solution. Spinning process: Wet spinning was used with a spinneret orifice diameter of 0.2 mm and an extrusion speed of 2 mL / min. The fibers were then placed in a coagulation bath containing an ethanol solution with a mass fraction of 7% calcium chloride at a temperature of 25°C. The nascent fibers were stretched three times their original size at a stretching speed of 15 m / min and dried in an oven at 70°C for 3 hours. Preparation of the webbing: The fabric was prepared by knitting at 30 rpm with a needle pitch of 2 mm. The fabric was then washed at 40℃ for 10 minutes, followed by immersion in a 3% (w / w) silicone softener solution at 50℃ for 20 minutes, and finally dried at 80℃ to obtain a bio-based antibacterial elastic functional fabric. Testing showed that the fabric achieved an antibacterial rate of over 99.5% against both *Escherichia coli* and *Staphylococcus aureus*, with an elastic recovery rate of 88%. Example 5 Raw material preparation Preparation of hemp nanocellulose: 150g of hemp fiber was soaked in 4000mL of 5% sodium hydroxide solution and stirred at 80℃ for 2 hours. The solution was then repeatedly rinsed with deionized water until neutral. 6g of cellulase (2% by mass) was added, and the enzymatic hydrolysis reaction was carried out at pH 5.5 and 55℃ for 4 hours. The hemp nanocellulose suspension was obtained by high-speed centrifugation and ultrasonic dispersion. Preparation of natural rubber latex: Separate the natural rubber latex from the natural rubber tree latex by centrifugation and adjust the concentration to 30%. Preparation of sodium alginate solution: Slowly add 50g of sodium alginate to 1500mL of deionized water, and heat to 60℃ while stirring at 500 rpm until the sodium alginate is completely dissolved.
[0017] Preparation of silver nitrate solution: Weigh 10g of silver nitrate and dissolve it in 200mL of deionized water to prepare a silver nitrate solution with a concentration of 0.5mol / L. Preparation of spinning solution: 300g of hemp nanocellulose suspension, 250g of natural rubber latex, and 200g of sodium alginate solution were mixed and stirred until homogeneous at a stirring speed of 800 rpm. 20g of silver nitrate solution was added dropwise to the mixture while stirring for 60 minutes to form the spinning solution. Spinning process: Wet spinning was used with a spinneret orifice diameter of 0.3 mm and an extrusion speed of 3 mL / min. The fibers were then placed in a coagulation bath containing an ethanol solution with a mass fraction of 10% calcium chloride at a temperature of 30°C. The nascent fibers were stretched four times their original size at a stretching speed of 20 m / min and dried in an oven at 80°C for 2 hours. Preparation of the webbing: The fabric was prepared by knitting at 30 rpm with a needle pitch of 2 mm. The fabric was then washed at 40℃ for 10 minutes, followed by immersion in a 3% (w / w) silicone softener solution at 50℃ for 20 minutes, and finally dried at 80℃ to obtain a bio-based antibacterial elastic functional fabric. Testing showed that the fabric achieved an antibacterial rate of over 99.8% against both *Escherichia coli* and *Staphylococcus aureus*, with an elastic recovery rate of 90%. The functional webbing prepared in Examples 1-5 was tested for antibacterial properties against Escherichia coli and Staphylococcus aureus using GB / T 20944.3-2008, Evaluation of antibacterial properties of textiles—Part 3: Vibration method—Test of antibacterial properties against Escherichia coli and Staphylococcus aureus in dyed polyester fibers. The elasticity properties of the webbing were tested using FZ / T 70006-2004, "Test method for tensile elastic recovery rate of knitted fabrics".
[0018] Table 1. Tests on antibacterial and elastic properties of webbing sample Antibacterial rate / % Elastic recovery rate / % Example 1 20.2 86 Example 2 99.2 5.1 Example 3 99.2 86 Example 4 99.5 88 Example 5 99.8 90 As shown in Table 1, the bio-based antibacterial elastic functional webbing prepared in Examples 1-5 can achieve good antibacterial rate and elastic recovery rate.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for preparing a bio-based antibacterial elastic functional webbing, characterized in that, Includes the following steps: Step 1: Raw material preparation Preparation of hemp nanocellulose: Select high-quality hemp fiber, remove impurities after pretreatment, and prepare hemp fiber into nanocellulose by chemical mechanical method or enzymatic hydrolysis method; Preparation of natural rubber latex: Natural rubber latex is separated from natural rubber tree latex by centrifugation, and the latex concentration is adjusted to 20-30% for later use; Preparation of sodium alginate solution: Slowly add sodium alginate to deionized water, and heat to 50-60℃ while stirring at 300-500 rpm until the sodium alginate is completely dissolved, thus preparing a sodium alginate solution with a mass fraction of 3-5%. Preparation of silver nitrate solution: Weigh an appropriate amount of silver nitrate, dissolve it in deionized water, and prepare a silver nitrate solution with a concentration of 0.1-0.5 mol / L; Step 2: Preparation of spinning solution Hemp nanocellulose suspension, natural rubber latex, and sodium alginate solution were mixed in a mass ratio of (3-5):(2-4):(1-3) and stirred evenly at a stirring speed of 500-800 rpm to obtain a mixed solution. A mixed solution is obtained; Add silver nitrate solution dropwise to the above mixed solution. The amount of silver nitrate solution added is 0.5-2% of the total mass of the mixed solution. Stir while adding the solution dropwise for 30-60 minutes to form a spinning solution. Step 3: Spinning process The spinning solution is extruded through a spinneret with an orifice diameter of 0.1-0.3 mm and an extrusion speed of 1-3 mL / min, and then enters a coagulation bath. The coagulation bath is an ethanol solution containing 5-10% calcium chloride by mass, and the temperature is controlled at 20-30℃. The spinning solution coagulates and forms nascent fibers in the coagulation bath. The nascent fibers are stretched to a ratio of 2-4 times and a stretching speed of 10-20 m / min, and then dried in an oven at a temperature of 60-80℃ for 2-4 hours to obtain dried fibers. Step 4: Preparation of the webbing Dry fibers are processed into fabrics using traditional textile processes, such as knitting or weaving. The prepared fabric undergoes finishing treatments, including washing and softening, to obtain a bio-based antibacterial elastic functional webbing.
2. The method for preparing a bio-based antibacterial elastic functional webbing according to claim 1, characterized in that, In step 1, hemp fibers are soaked in a 3-5% sodium hydroxide solution and stirred at 60-80°C for 2-3 hours. Then, they are repeatedly rinsed with deionized water until neutral. Next, 1-2% (w / w) of cellulase is added, and the enzymatic hydrolysis reaction is carried out at a pH of 4.5-5.5 and a temperature of 45-55°C for 4-6 hours. Finally, hemp nanocellulose suspension is obtained by high-speed centrifugation and ultrasonic dispersion.
3. The method for preparing a bio-based antibacterial elastic functional webbing according to claim 1, characterized in that, In step 4, the knitting process parameters are: knitting machine speed of 20-30 rpm and needle pitch of 1-2 mm; the weaving process parameters are: warp density of 50-80 yarns / cm and weft density of 40-60 yarns / cm.
4. The method for preparing a bio-based antibacterial elastic functional webbing according to claim 1, characterized in that, In step 4, deionized water is used for washing at a temperature of 30-40℃ for 10-20 minutes; the softening treatment uses a silicone softener solution with a mass fraction of 1-3%, and the fabric is soaked at a temperature of 40-50℃ for 15-20 minutes, and then dried at a temperature of 60-70℃.