Magnetic healthcare fabric with antibacterial infrared properties

Abstract

Disclosed is a preparation process for a magnetic healthcare fabric with antibacterial infrared properties. The preparation process for the magnetic healthcare fabric with antibacterial infrared properties comprises: BFO preparation, nano ZnO dispersion liquid preparation, magnetic BFO@ZnO particle preparation, and magnetic fiber preparation. A spinning process comprises: cotton opening and cleaning, cotton carding, drawing, roving, spinning, bobbin winding and weaving. The release of Zinc ion (Zn2+) serves as a main antibacterial mechanism of nano ZnO, and coffee carbon fiber has an outstanding far-infrared emission function, which acts on skin to improve body microcirculation and alleviate fatigue from exercising. The fabric has antibacterial, fatigue-alleviating, moisture-wicking, quick-drying, and cooling characteristics.

Description

A kind of antibacterial infrared magnetic health fabric Technical Field

[0001] The invention relates to a preparation process of magnetic health-care fabric with antibacterial infrared performance. Background Art

[0002] With the progress of society and the improvement of living standards, low carbon, environmental protection, health and sustainability have become the mainstays of people's lives. In recent years, with the advancement and application of science and technology, people have paid more attention to the perfect integration of technology and health, gradually shifting their focus to human health and recovery, and paying more and more attention to the restorative and functional properties of materials.

[0003] Coffee, along with cocoa and tea, is one of the world's most popular beverages. Not only is it rich in aroma and smooth, mellow in taste, but it also offers benefits such as invigorating energy and fatigue-fighting properties, making it a popular beverage. According to relevant statistics, global coffee consumption reached 15.1303 billion bags in 2015-2016, with an average annual growth rate of 1.3%. However, roasted coffee grounds have long been treated as waste, often dumped in landfills or incinerated. This large amount of abandoned coffee grounds not only wastes resources but also pollutes the environment. Coffee carbon fiber, a new natural fiber, is made by carbonizing discarded coffee grounds at 1000°C to create coffee carbon nanoparticles. This material is then added to a nylon or polyester solution and spun into fibers. The entire production process reduces carbon emissions by 48% compared to bamboo charcoal and 85% compared to coconut charcoal, offering low-carbon, environmentally friendly advantages.

[0004] In addition, relevant research shows that coffee charcoal has multiple functions. Due to the ultra-fine pore structure of coffee carbon fiber, coffee carbon fiber has excellent antibacterial function. At the same time, coffee charcoal itself has both diamond (SP3) and graphite (SP2) structures. When subjected to thermal energy, coffee carbon fiber will emit far infrared rays; when it produces friction with the air, it can release negative ions.

[0005] Through the study of the current status of research on coffee carbon fiber and textiles, we have gained a preliminary understanding of the performance of coffee carbon fiber, coffee yarn and their textiles. Coffee carbon textiles have excellent thermal insulation, breathability, antibacterial, far infrared, negative ion and other properties. Although there have been studies on its application, the development and research of this multifunctional coffee carbon fiber in the direction of sports functional textiles is still blank. Therefore, we should make full use of the abundant coffee grounds resources and excellent market conditions to develop seamless knitted sports fabrics, in order to fill and enrich the functional clothing market and meet people's current demand for sports consumption upgrades. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems of poor antibacterial performance, poor health care and environmental pollution of fabrics, and ultimately to obtain fabrics with infrared performance, antibacterial properties and health care.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] Step 1 BFO preparation:

[0009] Dissolve samarium oxide in nitric acid to prepare a samarium nitrate solution. Next, add ferric nitrate and bismuth nitrate (with an excess of Bi) to the DMF solution, stirring until the solids are completely dissolved. Add the samarium nitrate solution and stir evenly. Add citric acid and stir until the solids are completely dissolved. Ultrasonicate the mixture. Finally, place the mixture on a magnetic stirrer and stir with a magnetic rotor. Slowly add PVP powder and continue stirring until the PVP is completely dissolved.

[0010] Step 2: Preparation of nano ZnO dispersion:

[0011] A certain amount of nano-ZnO was weighed on a balance and placed in a beaker. Distilled water and a certain amount of dispersant were added. Ultrasonic treatment was performed at room temperature. Then ethylene glycol (EG) was added to the beaker to prepare a dispersion slurry. Ultrasonic treatment was continued and the slurry was evaporated to obtain a slurry-type nano-ZnO dispersion.

[0012] Step 3 Preparation of magnetic BFO@ZnO particles:

[0013] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed to obtain a magnetic BFO@ZnO particle solution;

[0014] Step 4 Spinning:

[0015] The magnetic fibers were prepared by electrospinning.

[0016] Step 5: Weaving

[0017] Fabrics of different specifications are obtained by weaving according to different interweaving ratios and organizational structures.

[0018] Preferably, 0.01~0.05mol of samarium oxide is dissolved in 20~30ml of nitric acid solution to prepare a 1~2mol / L samarium nitrate solution for use. Then take 40~50mL of DMF solution, add 4~8×10-3mol of ferric nitrate and 4~8.4×10-3mol of bismuth nitrate (Bi element excess 5~10%), and stir until the solid is completely dissolved. Then add 0.4~0.8mL of samarium nitrate solution and stir evenly. Then add 4~10g of citric acid and stir until the solid is completely dissolved. Then ultrasonicate the above mixed solution for about 10~20min. Finally, place the mixed solution on a magnetic stirrer and stir with a magnetic rotor. Slowly add 3~3.5g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0019] Preferably, 20-25 g of nano-ZnO is weighed on a balance and placed in a 250-500 mL beaker, 20-30 ml of distilled water and 5-8 g of a dispersant are added, and ultrasonic treatment is performed for 30-40 min at room temperature. Then, 200-240 g of ethylene glycol (EG) is added to the beaker to prepare a 10-15% wt dispersion slurry, and the ultrasonic treatment is continued for 60-70 min, and the water is evaporated and dehydrated to finally obtain a slurry-type nano-ZnO dispersion.

[0020] Preferably, the nano ZnO dispersion is mixed with the BFO precursor solution and ultrasonically dispersed for 30 to 40 minutes to obtain a magnetic BFO@ZnO particle solution.

[0021] Preferably, spinning is performed by an electrospinning method with parameters such as a DC voltage of 20-25 kV, a distance from the needle tip to the receiving roller of 20-25 cm, an electric field strength of 1-1.5 kV / cm, a propulsion speed of the syringe pump of 0.5-1 mL / h, an ambient temperature of 25-30°C, and a humidity of 45-50%.

[0022] As a preferred spinning process:

[0023] (1) Opening and cleaning cotton

[0024] Manual loosening is used to tear the fibers evenly and lay them into a layer.

[0025] Among them, coffee carbon fiber does not contain impurities, but its strength is relatively low, and using a machine to open and clean the cotton may cause damage to the fiber.

[0026] (2) Carding

[0027] The carding machine cylinder speed is 300~360r / min, and the licker-in speed is 800~850r / min.

[0028] The carding process should focus on combing and reducing fiber damage, and the carding process should be based on the principle of increasing fiber transfer.

[0029] By adopting the present invention, the fineness of the coffee carbon fiber is finer and the strength is lower. The carding distance is appropriately enlarged, the licker-in speed is reduced, the damage to the fiber is reduced, the cotton drop distance is reduced, the smooth transfer of the fiber is ensured, and the fiber is prevented from falling on the cylinder doffer and getting entangled and blocking the carding area.

[0030] (3) Drawing:

[0031] Coffee charcoal pre-drawing: dry weight: 16g / 3m~17.6g / 5m, drawing frame model FA306,

[0032] Drafting ratio: 8~8.5 times; rear area drafting 1~1.7 times, speed: 200~210m / min, bell mouth: 3~3.5mm, gauge 5mm×15mm~7mm×20mm.

[0033] The speed of drawing coffee charcoal and magnetic fiber is 200~210m / min, the bell mouth is 3~3.5mm, and the gauge is 5mm×15mm~7mm×16mm.

[0034] (4) Coarse yarn

[0035] The twist of the blended yarn is determined to be 5~5.5 twists / 10cm, and the FA423 roving frame is selected.

[0036] Among them, the bonding force between coffee carbon fiber and magnetic fiber is poor, so the twist coefficient of roving should be reasonably selected. If it is too large, it will easily affect the subsequent spinning process and the yarn cannot be stretched. If it is too small, the roving will easily slip and cause unexpected elongation.

[0037] (5) Spun yarn

[0038] Choose 1~1.5 times smaller rear zone draft, 1~3.0mm gauge, and V-type draft.

[0039] The present invention can prevent coffee carbon fibers from winding around rollers, improve drafting efficiency, reduce uneven addition, and not destroy the cohesive force between fibers.

[0040] (6) Winding

[0041] The winding speed is 1000~1200m / min.

[0042] The principle of this invention is "low tension, low speed". The winding process is set at a low speed and low tension to reduce yarn hairiness and the number of ends down. A capacitive electronic yarn clearer is used to reduce yarn defects.

[0043] Preferably, the weaving parameters are: thickness 0.7~1.1mm, square meter weight 200~260g / m2, horizontal density 100~120 turns / 5cm, vertical density 110~200 turns / 5cm, total density 500~900 turns / cm2. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a preparation process flow of antibacterial infrared magnetic health fabric. Implementation Method

[0045] Example 1

[0046] Dissolve 0.01 mol of samarium oxide in 20 ml of nitric acid solution to prepare a 1 mol / L samarium nitrate solution for later use. Then take 40 mL of DMF solution, add 4 × 10-3 mol of ferric nitrate and 4 × 10-3 mol of bismuth nitrate (Bi element excess 5%), stir until the solid is completely dissolved, then add 0.4 mL of samarium nitrate solution, stir evenly, then add 4 g of citric acid, stir until the solid is completely dissolved, and then ultrasonicate the mixed solution for about 10 minutes. Finally, slowly add 3 g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0047] Weigh 20g of nano-ZnO using a balance and place it in a 250mL beaker. Add 20ml of distilled water and 5g of dispersant and ultrasonically treat for 30min. Then add 200g of ethylene glycol (EG) to the beaker to prepare a 10%wt dispersion slurry. Continue ultrasonicating for 60min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0048] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 30 minutes to obtain a magnetic BFO@ZnO particle solution.

[0049] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 20 kV, a distance from the needle tip to the receiving roller of 20 m, an electric field strength of 1 kV / cm, a propulsion speed of the syringe pump of 0.5 mL / h, an ambient temperature of 25 °C, and a humidity of 45%.

[0050] Spinning process:

[0051] (1) Opening and cleaning cotton

[0052] (2) Carding

[0053] The carding machine cylinder speed is 300r / min, and the licker-in speed is 800r / min.

[0054] (3) Drawing:

[0055] Coffee charcoal pre-drawing: dry weight: 16g / 3m, drawing frame model FA306,

[0056] Drafting ratio: 8 times; rear zone drafting 1 times, speed: 200m / min, bell mouth: 3mm, gauge 5mm×15mm.

[0057] The speed of the coffee charcoal and magnetic fiber drawing machine is 200m / min, the bell mouth is 3mm, and the gauge is 5mm×15mm.

[0058] (4) Coarse yarn

[0059] The twist of the blended yarn was determined to be 5 twists / 10cm, and the FA423 roving frame was selected.

[0060] (5) Spun yarn

[0061] Select 1 times smaller rear zone draft, 1mm gauge, and V-type draft.

[0062] (6) Winding

[0063] The winding speed is 1000m / min.

[0064] Weaving parameters: thickness 0.7mm, square meter weight 200g / m2, horizontal density 100 turns / 5cm, vertical density 110 turns / 5cm, total density 500 turns / cm2.

[0065] Example 2

[0066] Dissolve 0.02 mol of samarium oxide in 24 ml of nitric acid to prepare a 1 mol / L samarium nitrate solution. Next, add 5 × 10⁻³ mol of ferric nitrate and 5 × 10⁻³ mol of bismuth nitrate (7% excess of bismuth) to 45 mL of DMF solution. Stir until the solids are completely dissolved. Add 0.6 mL of samarium nitrate solution and stir evenly. Add 6 g of citric acid and stir until the solids are completely dissolved. Ultrasonicate the mixture for approximately 14 minutes. Finally, slowly add 3.2 g of PVP powder and continue stirring until the PVP is completely dissolved, forming a BFO solution.

[0067] Weigh 22g of nano-ZnO on a balance and place it in a 500mL beaker. Add 23ml of distilled water and 8g of dispersant and ultrasonically treat for 35min. Then add 220g of ethylene glycol (EG) to the beaker to prepare a 12%wt dispersion slurry. Continue ultrasonicating for 65min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0068] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 34 minutes to obtain a magnetic BFO@ZnO particle solution.

[0069] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 22 kV, a distance from the needle tip to the receiving roller of 22 cm, an electric field strength of 1.2 kV / cm, a syringe pump propulsion speed of 0.6 mL / h, an ambient temperature of 27 °C, and a humidity of 47%.

[0070] Spinning process:

[0071] (1) Opening and cleaning cotton

[0072] (2) Carding

[0073] The carding machine cylinder speed is 320r / min, and the licker-in speed is 810r / min.

[0074] (3) Drawing:

[0075] Coffee charcoal pre-drawing: dry weight: 16.5g / 3m, drawing frame model FA306,

[0076] Drafting ratio: 8.3 times; rear zone drafting 1.4 times, speed: 205m / min, bell mouth: 3.3mm, gauge 5mm×18mm.

[0077] The speed of the coffee charcoal and magnetic fiber drawing machine is 206m / min, the bell mouth is 3mm, and the gauge is 5mm×15mm.

[0078] (4) Coarse yarn

[0079] The twist of the blended yarn was determined to be 5 twists / 10cm, and the FA423 roving frame was selected.

[0080] (5) Spun yarn

[0081] Choose 1.3 times smaller rear zone draft, 2mm gauge, and V-type draft.

[0082] (6) Winding

[0083] The winding speed is 1100m / min.

[0084] Weaving parameters: thickness 0.8mm, square meter weight 220g / m2, horizontal density 110 turns / 5cm, vertical density 150 turns / 5cm, total density 600 turns / cm2.

[0085] Example 3

[0086] Dissolve 0.04 mol of samarium oxide in 28 ml of nitric acid solution to prepare a 1.5 mol / L samarium nitrate solution for later use. Then take 48 mL of DMF solution, add 7 × 10-3 mol of ferric nitrate and 8 × 10-3 mol of bismuth nitrate (8% excess of Bi element), stir until the solid is completely dissolved, then add 0.7 mL of samarium nitrate solution, stir evenly, then add 8 g of citric acid, stir until the solid is completely dissolved, and then ultrasonicate the above mixed solution for about 18 minutes. Finally, slowly add 3.4 g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0087] Use a balance to weigh 24g of nano-ZnO and place it in a 500mL beaker. Add 28ml of distilled water and 6g of dispersant and ultrasonically treat for 38min. Then add 230g of ethylene glycol (EG) to the beaker to prepare a 14%wt dispersion slurry. Continue ultrasonic treatment for 68min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0088] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 38 minutes to obtain a magnetic BFO@ZnO particle solution.

[0089] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 24 kV, a distance from the needle tip to the receiving roller of 24 cm, an electric field strength of 1.4 kV / cm, a syringe pump propulsion speed of 0.8 mL / h, an ambient temperature of 28°C, and a humidity of 48%.

[0090] Spinning process:

[0091] (1) Opening and cleaning cotton

[0092] (2) Carding

[0093] The carding machine cylinder speed is 350r / min, and the licker-in speed is 840r / min.

[0094] (3) Drawing:

[0095] Coffee charcoal pre-drawing: dry weight: 17g / 5m, drawing frame model FA306,

[0096] Drafting ratio: 8.5 times; rear zone drafting 1.7 times, speed: 208m / min, bell mouth: 3.5mm, gauge 7mm×20mm.

[0097] The speed of the coffee charcoal and magnetic fiber drawing machine is 208m / min, the bell mouth is 3.5mm, and the gauge is 7mm×16mm.

[0098] (4) Coarse yarn

[0099] The twist of the blended yarn was determined to be 5.5 twists / 10cm, and the FA423 roving frame was selected.

[0100] (5) Spun yarn

[0101] Select 1.5 times smaller rear zone draft, 3.0mm gauge, and V-type draft.

[0102] (6) Winding

[0103] The winding speed is 1115m / min.

[0104] Weaving parameters: thickness 1mm, square meter weight 240g / m2, horizontal density 115 turns / 5cm, vertical density 180 turns / 5cm, total density 800 turns / cm2.

[0105] Example 4

[0106] Dissolve 0.05 mol of samarium oxide in 30 ml of nitric acid solution to prepare a 2 mol / L samarium nitrate solution for later use. Then take 50 mL of DMF solution, add 8 × 10-3 mol of ferric nitrate and 8.4 × 10-3 mol of bismuth nitrate (Bi element excess 10%), stir until the solid is completely dissolved, then add 0.8 mL of samarium nitrate solution, stir evenly, then add 10 g of citric acid, stir until the solid is completely dissolved, and then ultrasonicate the above mixed solution for about 20 minutes. Finally, slowly add 3.5 g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0107] Weigh 25g of nano-ZnO on a balance and place it in a 500mL beaker. Add 30ml of distilled water and 8g of dispersant and ultrasonically treat for 40min. Then add 240g of ethylene glycol (EG) to the beaker to prepare a 15%wt dispersion slurry. Continue ultrasonicating for 70min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0108] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 40 minutes to obtain a magnetic BFO@ZnO particle solution.

[0109] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 25 kV, a distance from the needle tip to the receiving roller of 25 cm, an electric field strength of 1.5 kV / cm, a propulsion speed of the syringe pump of 1 mL / h, an ambient temperature of 30 °C, and a humidity of 50%.

[0110] Spinning process:

[0111] (1) Opening and cleaning cotton

[0112] (2) Carding

[0113] The carding machine cylinder speed is 360r / min, and the licker-in speed is 850r / min.

[0114] (3) Drawing:

[0115] Coffee charcoal pre-drawing: dry weight: 17.6g / 5m, drawing frame model FA306,

[0116] Drafting ratio: 8.5 times; rear zone drafting 1.7 times, speed: 210m / min, bell mouth: 3.5mm, gauge 7mm×20mm.

[0117] The speed of the coffee charcoal and magnetic fiber drawing machine is 210m / min, the bell mouth is 3.5mm, and the gauge is 7mm×16mm.

[0118] (4) Coarse yarn

[0119] The twist of the blended yarn was determined to be 5.5 twists / 10cm, and the FA423 roving frame was selected.

[0120] (5) Spun yarn

[0121] Choose 1.5 times smaller rear zone draft, 3.0mm interval, V-type draft.

[0122] (6) Winding

[0123] The winding speed is 1200m / min.

[0124] Weaving parameters: thickness 1.1mm, square meter weight 260g / m2, horizontal density 120 turns / 5cm, vertical density 200 turns / 5cm, total density 900 turns / cm2.

[0125] Comparative Example 1

[0126] Dissolve 0.01 mol of samarium oxide in 20 ml of nitric acid solution to prepare a 1 mol / L samarium nitrate solution for later use. Then take 40 mL of DMF solution, add 4 × 10-3 mol of ferric nitrate and 4 × 10-3 mol of bismuth nitrate (Bi element excess 5%), stir until the solid is completely dissolved, then add 0.4 mL of samarium nitrate solution, stir evenly, then add 4 g of citric acid, stir until the solid is completely dissolved, and then ultrasonicate the mixed solution for about 10 minutes. Finally, slowly add 3 g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0127] Weigh 20g of nano-ZnO using a balance and place it in a 250mL beaker. Add 20ml of distilled water and 5g of dispersant and ultrasonically treat for 30min. Then add 200g of ethylene glycol (EG) to the beaker to prepare a 10%wt dispersion slurry. Continue ultrasonicating for 60min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0128] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 30 minutes to obtain a magnetic BFO@ZnO particle solution.

[0129] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 20 kV, a distance from the needle tip to the receiving roller of 20 m, an electric field strength of 1 kV / cm, a propulsion speed of the syringe pump of 0.5 mL / h, an ambient temperature of 25 °C, and a humidity of 45%.

[0130] Spinning process:

[0131] (1) Opening and cleaning cotton

[0132] (2) Carding

[0133] The carding machine cylinder speed is 300r / min, and the licker-in speed is 800r / min.

[0134] (3) Drawing:

[0135] Coffee charcoal pre-drawing: dry weight: 16g / 3m, drawing frame model FA306,

[0136] Drafting ratio: 8 times; rear zone drafting 1 times, speed: 200m / min, bell mouth: 3mm, gauge 5mm×15mm.

[0137] The speed of the coffee charcoal and magnetic fiber drawing machine is 200m / min, the bell mouth is 3mm, and the gauge is 5mm×15mm.

[0138] (4) Coarse yarn

[0139] The twist of the blended yarn was determined to be 5 twists / 10cm, and the FA423 roving frame was selected.

[0140] (5) Spun yarn

[0141] Select 1 times smaller rear zone draft, 1mm gauge, and V-type draft.

[0142] (6) Winding

[0143] The winding speed is 1000m / min.

[0144] Weaving parameters: thickness 0.7mm, square meter weight 200g / m2, horizontal density 100 turns / 5cm, vertical density 110 turns / 5cm, total density 500 turns / cm2.

[0145] Comparative Example 2

[0146] Dissolve 0.01 mol of samarium oxide in 20 ml of nitric acid solution to prepare a 1 mol / L samarium nitrate solution for later use. Then take 40 mL of DMF solution, add 4 × 10-3 mol of ferric nitrate and 4 × 10-3 mol of bismuth nitrate (Bi element excess 5%), stir until the solid is completely dissolved, then add 0.4 mL of samarium nitrate solution, stir evenly, then add 4 g of citric acid, stir until the solid is completely dissolved, and then ultrasonicate the mixed solution for about 10 minutes. Finally, slowly add 3 g of PVP powder and stir until the PVP is completely dissolved to form a BFO solution.

[0147] Weigh 20g of nano-ZnO using a balance and place it in a 250mL beaker. Add 20ml of distilled water and 5g of dispersant and ultrasonically treat for 30min. Then add 200g of ethylene glycol (EG) to the beaker to prepare a 10%wt dispersion slurry. Continue ultrasonicating for 60min, evaporate and dehydrate, and finally obtain a slurry-type nano-ZnO dispersion.

[0148] The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 30 minutes to obtain a magnetic BFO@ZnO particle solution.

[0149] Spinning: The electrospinning method was used with the following parameters: a DC voltage of 20 kV, a distance from the needle tip to the receiving roller of 20 m, an electric field strength of 1 kV / cm, a propulsion speed of the syringe pump of 0.5 mL / h, an ambient temperature of 25 °C, and a humidity of 45%.

[0150] Spinning process:

[0151] (1) Opening and cleaning cotton

[0152] (2) Carding

[0153] The carding machine cylinder speed is 300r / min, and the licker-in speed is 800r / min.

[0154] (3) Drawing:

[0155] Coffee charcoal pre-drawing: dry weight: 16g / 3m, drawing frame model FA306,

[0156] Drafting ratio: 8 times; rear zone drafting 1 times, speed: 200m / min, bell mouth: 3mm, gauge 5mm×15mm.

[0157] The speed of the coffee charcoal and magnetic fiber drawing machine is 200m / min, the bell mouth is 3mm, and the gauge is 5mm×15mm.

[0158] (4) Coarse yarn

[0159] The twist of the blended yarn was determined to be 5 twists / 10cm, and the FA423 roving frame was selected.

[0160] (5) Spun yarn

[0161] Select 1 times smaller rear zone draft, 1mm gauge, and V-type draft.

[0162] (6) Winding

[0163] The winding speed is 1000m / min.

[0164] Weaving parameters: thickness 0.7mm, square meter weight 200g / m2, horizontal density 100 turns / 5cm, vertical density 110 turns / 5cm, total density 500 turns / cm2.

[0165] Antibacterial testing

[0166] GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles - Part 3: Oscillation Method" test method: Escherichia coli and Staphylococcus aureus were selected as representative Gram-negative and Gram-positive bacteria. Fifteen specimens were cut into approximately 5mm x 5mm pieces, and 0.75g ± 0.05g of each sample was weighed as a test sample. After sterilization, each sample was placed into three sealed flasks containing bacterial solution. The flasks were then placed on a thermostatic oscillator and shaken at 150 rpm for 18 hours at 24°C ± 1°C. In a safety cabinet, the bacterial solution was serially diluted using the 10-fold dilution method. 1mL of the solution was transferred from a test tube into a sterile Petri dish, spread evenly, and sealed with plastic wrap. The dish was then inverted and incubated in a 37°C incubator for 24-48 hours. The colony count and inhibition rate were determined.

[0167] Infrared performance test

[0168] (1) First, the sample is kept at a constant temperature and humidity for 24 hours.

[0169] (2) The laboratory temperature was maintained at 24 ± 2 °C and the relative humidity was maintained at 65 ± 3%. To avoid interference from solar far-infrared radiation, the curtains in the laboratory were drawn before the test, ensuring only low lighting that was sufficient for normal reading.

[0170] (3) Subjects were required to wear loose short-sleeved or sleeveless clothing, and test marks were made in advance on the subject's left forearm at 7 cm from the cubital fossa and 7 cm from the distal radioulnar joint of the wrist with a black pen. The test points were ensured to be the same anatomical site in each test to reduce errors caused by spatial differences. To ensure that the subjects adapted to the test temperature and calmed down, the subjects sat quietly in the laboratory for 30 minutes before the test, and kept their left arms still to minimize microcirculation fluctuations caused by movement. After each test, the subjects were required to sit quietly for 10 minutes to recover. After the test, the flow rate ratio Fh after covering was calculated. Finally, the blood flow promotion factor after covering the sample was calculated as an indicator to evaluate the fabric's ability to promote microcirculation.

[0171] (4) Turn on the test instrument and adjust the distance between the tester main unit and the forearm to be tested.

[0172] Negative ion performance test

[0173] Refer to GB / T 30128-2013 "Test and evaluation of negative ion generation in textiles"

[0174] Washability test

[0175] The test standard for the washability of magnetic fabrics is carried out in accordance with the standard method of GB / T3921.1-1997.

[0176]

[0177]

[0178] As shown in the table, Example 4 exhibited the best antibacterial effect, achieving an inhibition rate of 99% against both Escherichia coli and Staphylococcus aureus, demonstrating excellent antibacterial performance. The 1+2 pseudo-rib fabric exhibited the best antibacterial effect, followed by the 1+1 pseudo-jersey fabric. Plain plated fabric exhibited the poorest antibacterial effect. This is because, compared to the 1+2 pseudo-rib and 1+1 pseudo-jersey fabrics, plain plated fabrics are more likely to store human metabolic waste, creating favorable conditions for the growth and reproduction of microorganisms.

[0179]

[0180] As shown in the table, Example 4 achieved the best results. The added coffee charcoal nanofibers in the fabric promote blood flow, namely, a far-infrared effect. Furthermore, the higher the coffee charcoal content, the better the blood flow-boosting effect. The order of 1+2 pseudo-rib weave > 1+1 pseudo-plain weave > plain plated weave is 1+2. This is because the three fabric weaves vary in thickness, resulting in different coffee charcoal contents within the same fabric area. Therefore, the 1+2 pseudo-rib weave exhibits the best blood flow-boosting effect, followed by the 1+1 pseudo-plain weave, while the plain plated weave exhibits the least.

[0181]

[0182] Coffee charcoal has excellent negative ion release properties. The higher the coffee charcoal content, the higher the negative ion production of the fabric. Fabrics with a 1+2 pseudo-rib weave were found to have the highest negative ion production, followed by fabrics with a 1+1 pseudo-plain weave, and fabrics with a plain plated weave had the lowest negative ion production. This is because the 1+2 pseudo-rib weave is thicker and fluffier than the other two weaves, resulting in a larger specific surface area and a higher negative ion production per unit area.

[0183]

[0184] As can be seen from the table, Example 4 has the best washability, and the magnetic induction intensity of the fabric in the comparative example has a more obvious downward trend. This is because the magnetic powder attached to the surface of the magnetic fabric falls off to a certain extent during the washing process, but overall the decrease in the magnetic induction intensity of the magnetic fabric is not significant, which shows that the magnetic powder is firmly combined with the fiber, the loss of magnetic powder particles is small during the washing process, and the magnetic fabric has good washability.

[0185] This specific embodiment is merely an explanation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A process for preparing antibacterial infrared magnetic health fabric, characterized in that: Step 1 BFO preparation: Dissolve samarium oxide in nitric acid solution to prepare samarium nitrate solution for later use. Then take DMF solution, add ferric nitrate and bismuth nitrate (Bi element is excessive) respectively, stir until the solid is completely dissolved, then add samarium nitrate solution, stir evenly, then add citric acid, stir until the solid is completely dissolved, and then ultrasonicate the mixed solution; finally, place the mixed solution on a magnetic stirrer and stir with a magnetic rotor, slowly add PVP powder, and stir until the PVP is completely dissolved; Step 2 Preparation of nano ZnO dispersion: Weigh a certain amount of nano ZnO with a balance and place it in a beaker, add distilled water and a certain amount of dispersant, and perform ultrasonic treatment at room temperature. Then, add ethylene glycol (EG) to the beaker to prepare a dispersed slurry, and continue to perform ultrasonic treatment, evaporate and dehydrate, and finally obtain a slurry-type nano ZnO dispersion. Step 3 Preparation of magnetic BFO@ZnO particles: The nano ZnO dispersion liquid is mixed with the BFO precursor solution, and ultrasonically dispersed to obtain a magnetic BFO@ZnO particle solution; Step 4 Spinning: The magnetic fibers were prepared by electrospinning. Step 5: Weaving Fabrics of different specifications are obtained by weaving according to different interweaving ratios and organizational structures.

2. The method for producing an antibacterial infrared magnetic health fabric according to claim 1, characterized in that: Dissolve 0.01~0.05mol samarium oxide in 20~30ml nitric acid solution to prepare 1~2mol / L samarium nitrate solution for use; then take 40~50ml DMF solution, add 4~8×10-3mol ferric nitrate and 4~8.4×10-3mol bismuth nitrate (Bi element excess 5~10%) respectively, stir until the solid is completely dissolved, then add 0.4~0.8mL samarium nitrate solution, stir evenly, then add 4~10g citric acid, stir until the solid is completely dissolved, and then ultrasonicate the mixed solution for about 10~20min; finally, place the mixed solution on a magnetic stirrer and stir with a magnetic rotor, slowly add 3~3.5g PVP powder, and stir until the PVP is completely dissolved to form a BFO solution.

3. The method for producing an antibacterial infrared magnetic health fabric according to claim 2, characterized in that: Weigh 20-25 g of nano ZnO on a balance and place it in a 250-500 mL beaker. Add 20-30 ml of distilled water and 5-8 g of dispersant. Ultrasonicate for 30-40 min at room temperature. Then add 200-240 g of ethylene glycol (EG) to the beaker to prepare a 10-15% wt dispersion slurry. Continue ultrasonicating for 60-70 min, evaporate and dehydrate, and finally obtain a slurry-type nano ZnO dispersion.

4. The method for producing an antibacterial infrared magnetic health fabric according to claim 3, characterized in that: The nano ZnO dispersion was mixed with the BFO precursor solution and ultrasonically dispersed for 30-40 minutes to obtain a magnetic BFO@ZnO particle solution.

5. The method for producing an antibacterial infrared magnetic health fabric according to claim 4, characterized in that: Spinning: The electrospinning method was used with the following parameters: a DC voltage of 20-25 kV, a distance from the needle tip to the receiving roller of 20-25 cm, an electric field strength of 1-1.5 kV / cm, a propulsion speed of the syringe pump of 0.5-1 mL / h, an ambient temperature of 25-30 °C, and a humidity of 45-50%.

6. The method for producing an antibacterial infrared magnetic health fabric according to claim 1, characterized in that: Spinning process: (1) Opening and cleaning cotton Manual loosening is adopted to tear the fibers evenly and lay them into one layer; (2) Carding The carding machine cylinder speed is 360r / min, and the licker-in speed is 850r / min; (3) Drawing: Coffee charcoal pre-drawing: dry weight: 16g / 3m~17.6g / 5m, drawing machine model FA306, Drafting multiple: 8~8.5 times; rear drafting 1~1.7 times, speed: 200~210m / min, bell mouth: 3~3.5mm, gauge 5mm×15mm~7mm×20mm; The speed of coffee charcoal and magnetic fiber drawing is 200~210m / min, the bell mouth is 3~3.5mm, and the gauge is 5mm×15mm~7mm×16mm; (4) Coarse yarn The twist of blended yarn is determined to be 5-5.5 twists / 10cm, and the FA423 roving frame is selected; (5) Fine yarn Choose 1~1.5 times smaller rear draft, 1~3.0mm gauge, V-type draft; (6) Winding The winding speed is 1000~1200m / min.

7. The method for producing an antibacterial infrared magnetic health fabric according to claim 1, characterized in that: Weaving parameters: thickness 0.7~1.1mm, square meter weight 200~260g / m2, horizontal density 100~120 turns / 5cm, vertical density 110~200 turns / 5cm, total density 500~900 turns / cm2.

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