Antibacterial magnetic health-care fabric
By blending Fe3O4@SiO2@Ag magnetic nanoparticles and negative ion viscose fiber into bamboo fiber, an antibacterial magnetic health care fabric was prepared, which solved the problems of poor antibacterial performance and insufficient health care of the fabric, and achieved a green and environmentally friendly antibacterial effect and magnetic therapy function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEYE HEALTH TECH CO LTD
- Filing Date
- 2023-05-24
- Publication Date
- 2026-05-15
AI Technical Summary
Existing antibacterial fabrics are insufficient in terms of health care and environmental protection performance, as they cannot effectively inhibit bacterial growth and do not have magnetic therapy functions.
The magnetic fibers are prepared by blending Fe3O4@SiO2@Ag magnetic nanoparticles with bamboo fibers and using wet spinning technology. Combined with negative ion viscose fibers, the fabric is woven using a specific process to form a three-dimensional magnetic wire network to promote skin microcirculation and use negative ions to generate a strong electric field to kill or inhibit bacteria.
It achieves a green and environmentally friendly antibacterial effect, effectively inhibiting the growth of bacteria such as Escherichia coli and Staphylococcus aureus, while also providing magnetic therapy and health care functions, promoting cell metabolism and improving the body's disease resistance.
Smart Images
Figure CN116623342B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an antibacterial fabric, and more particularly to a preparation process for an antibacterial magnetic health care fabric. Background Technology
[0002] Bamboo fiber refers to fiber directly separated from bamboo using a unique process. Generally, depending on the spinning system used in textile mills, natural bamboo is sawn to the required production length, and impurities such as lignin, pentosans, bamboo powder, and pectin are removed using mechanical and physical methods to directly extract the bamboo fiber. Bamboo fiber is a pure natural fiber, a green and environmentally friendly fiber, with excellent fiber properties, a unique style, excellent wearability, and significant health benefits.
[0003] Clothing and accessories made of bamboo fiber are favored not only because they allow people to enjoy the feeling of returning to nature and because they are derived from evergreen plants, but more importantly because they have advantages that other natural and chemical fibers cannot match, such as excellent colorability, breathability, and moisture absorption and dissipation.
[0004] Besides its widespread application in home appliance manufacturing, automotive interior decoration materials, insulation materials, and materials manufacturing, negative ions are also seeing significant development in the textile industry.
[0005] (1) Bedding.
[0006] Humans need at least 8 hours of sleep every day, so bedding, including sheets, blankets, mattresses, quilts, and pillows, will be very beneficial to human health, disease prevention, and treatment of certain chronic diseases if it has the function of generating negative ions.
[0007] (2) Clothing.
[0008] Underwear, outerwear, suits, cashmere sweaters and trousers—whether for spring / summer fashion or autumn / winter warmth—allow people to enjoy the benefits of negative ion-functional textiles at any time. Insoles, socks, gloves, hats, and other items provide head-to-toe health care.
[0009] Magnetic fibers are functional textile fibers made by adding magnetic nanoparticles to polymer solutions. The permanent magnet particles in the fibers are not completely uniform. The disordered and irregular arrangement of the N and S poles of the permanent magnet particles in the magnetic fibers, as well as the interweaving of the fibers, cause the overlap and reduction of the N and S poles of the permanent magnet particles, making the magnetic field on the surface of the magnetic therapy health care fabric regional.
[0010] The development of magnetic fibers stems from the fact that human cells are magnetic microstructures, and changes in external magnetic fields affect human physiological activities. Based on this principle, health products woven from magnetic fibers can improve microcirculation and play a role in healthcare. Summary of the Invention
[0011] The purpose of this invention is to solve the problems of poor antibacterial properties, lack of health benefits, and lack of environmental protection in fabrics, and ultimately to obtain green, healthy, antibacterial, and health-promoting fabrics.
[0012] The above-mentioned technical objective of the present invention is achieved through the following technical solution:
[0013] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0014] Adding EG and DEG solutions to FeCl3, NaAc, and Na3CA yields Fe 3+ Dispersion. The dispersion was added to a reaction vessel, the temperature was set, and after a certain reaction time, it was cooled to room temperature. The magnetic nanoparticles were collected using a magnet. The mixture was washed continuously with EtOH and H2O, and finally the magnetic nanoparticles were dispersed in H2O to obtain the Fe3O4 magnetic nanoparticle dispersion.
[0015] Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0016] Fe3O4 magnetic nanoparticles were dispersed in a mixed solvent (EtOH: H2O), and NH3·H2O was added and ultrasonically stirred. TEOS was dissolved in EtOH, ultrasonicated, and then added dropwise at a rate of 2 drops / s. After the addition was complete, the reaction was ultrasonicated again. A certain temperature was maintained. After the reaction was completed, the Fe3O4@SiO2 magnetic nanoparticles were collected with a magnet. They were washed continuously with EtOH and H2O, and finally the magnetic nanoparticles were dispersed in H2O to obtain the Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in deionized water and ultrasonically vibrated to redisperse it uniformly. The prepared AgNO3 solution was added to the suspension and ultrasonically vibrated. Freshly prepared NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated. The mixture was centrifuged, washed, and treated several times until the supernatant was clear. Then, it was freeze-dried, and the sample was collected to obtain the Fe3O4@SiO2@Ag composite material.
[0017] Step (3) Preparation of magnetic fibers:
[0018] Magnetic particles are ultrasonically dispersed in bamboo fibers for a certain period of time. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0019] Step (4) Spinning:
[0020] Beating—combing—drawing—roving—spinning—winding—doubling—twisting.
[0021] Step (5) Weaving:
[0022] Using blended yarns of magnetic fibers and negative ion viscose fibers, and based on a 2 / 2 twill weave, single-layer and double-layer fabrics are developed, with each fabric having the same warp and weft yarns.
[0023] Preferably, step (1) involves the preparation of Fe3O4 magnetic nanoparticles:
[0024] 1.2–1.5 g FeCl3, 3–3.5 g NaAc, and 0.2–0.5 g Na3CA are added to 10–20 mL EG and 30–50 mL LDEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set at a temperature of 180–220 °C for 8–10 h. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0025] As a preferred option, step (2) involves the preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0026] Disperse 1-1.5 g of Fe3O4 magnetic nanoparticles in 700-750 mL of mixed solvent (EtOH: H2O = 10:7-15:14), add 10-15 mL of NH3·H2O, and sonicate for 25-45 min. Dissolve 8-10 mL of TEOS in 100 mL of EtOH, sonicate, and then add the TEOS dropwise at a rate of 2-5 drops / s. After the addition is complete, sonicate for 4-6 h. Maintain the temperature below 30-35℃. After the reaction is complete, collect the Fe3O4@SiO2 magnetic nanoparticles with a magnet. Wash continuously with EtOH and H2O, and finally disperse the magnetic nanoparticles in H2O to obtain the Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in 30-50 mL of deionized water and ultrasonically vibrated for 8-10 min to redisperse it into a Fe3O4@SiO2 suspension. 1-3 mL of 0.1-0.3 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 10-15 min. 400-500 μL of freshly prepared 0.5-0.8 mol / L NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated for 15-20 min. The mixture was centrifuged at 8000-10000 r / min, washed with deionized water, and the process was repeated several times until the supernatant was clear. The mixture was then freeze-dried to obtain the Fe3O4@SiO2@Ag composite material.
[0027] Preferably, step (3) involves the preparation of magnetic fibers:
[0028] Magnetic particles are ultrasonically dispersed in bamboo fibers for 20-30 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0029] The process parameters selected in this spinning process are as follows:
[0030] Spinneret specifications: SPN1400 × 0.07 mm
[0031] Spinning speed: 15~16 m / min
[0032] Draw ratio: 1.4~1.6 times
[0033] Roller speed: 70~80 r / min
[0034] Two-roll speed: 100 ~ 120 r / min
[0035] Coagulation bath length: 1.0 m ~ 1.5 m
[0036] Coagulation bath concentration: 30%~60%
[0037] The advantage of this invention is that the magnetic fabric made of magnetic fibers emits magnetic lines of force from countless permanent magnet particles, which interweave to form a three-dimensional magnetic field network. This network can massage and stimulate the skin in all directions with three-dimensional magnetic lines of force, promoting skin microcirculation.
[0038] Because magnetic field lines have the same effect as acupuncture in traditional Chinese medicine, physical therapy can be performed anytime, anywhere. In addition, the biomagnetic field in the body's own nerve fluids is affected by the external magnetic field, which promotes cell metabolism, changes physiological functions, and enhances the body's disease resistance.
[0039] Preferably, step (4) is spinning:
[0040] The spinning process is as follows: The fiber materials are fed into a beating machine at a blending ratio of 50:50 to 70:30, repeated 3 to 5 times to ensure uniform mixing of different fiber materials; the uniformly mixed materials are combed using an FB301 carding machine; the combed sliver is drawn 3 to 4 times on an FA306 drawing frame to ensure uniform mixing of different fiber types and improve sliver uniformity; the drawn sliver is drafted and twisted on a 458A roving frame to form roving, which is then placed in a constant temperature room for 18 to 24 hours; the roving is drafted and twisted on a 129 spinning frame to form yarn; finally, the yarn is spun through winding, two single yarns being combined, and double twisting.
[0041] The winding process primarily removes coarse yarns and impurities. It utilizes electronic yarn clearers and air splicers, adopting a "low speed, minimal hair growth" process principle to appropriately reduce yarn tension and ensure a smooth yarn path.
[0042] Step (5) Weaving:
[0043] Using blended yarns of magnetic fibers and negative ion viscose fibers, and based on a 2 / 2 twill weave, single-layer and double-layer fabrics are developed, with each fabric having the same warp and weft yarns.
[0044] Among them, the weaving process mainly adopts the process principle of "medium tension, large opening, and late weft insertion" to reduce the phenomena of unclear opening, warp breakage, and weft breakage caused by friction and adhesion between yarns.
[0045] Using this invention, negative ion antibacterial textiles have excellent antibacterial and bacteriostatic effects, and can inhibit Escherichia coli, Staphylococcus aureus, mold, etc., because the negative ion material is surrounded by 10 4 ~10 7A strong electric field of V / m. Bacteria in the electric field are killed or have their division and proliferation inhibited by the electric field and the 0.06 mVA microcurrent generated by the electric field; negative ions can not only kill bacteria that are harmful to the human body, but also do not harm the human body, and can achieve a long-term bactericidal effect.
[0046] The fiber used in this invention is green and environmentally friendly, and has a good antibacterial effect. Attached Figure Description
[0047] Figure 1 This is a preparation process for an antibacterial magnetic health care fabric;
[0048] Figure 2 Single-layer fabric installation diagram;
[0049] Figure 3 Image of double-layer fabric being installed on a machine. Detailed Implementation
[0050] Example 1
[0051] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0052] 1.2g FeCl3, 3g NaAc, and 0.2g Na3CA were added to 10mL EG and 30mL LDEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set to 180℃ for 8 hours. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0053] Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0054] 1 g of Fe3O4 magnetic nanoparticles were dispersed in 700 mL of a mixed solvent (EtOH: H2O = 10:7), and 10 mL of NH3·H2O was added. The mixture was ultrasonically stirred for 25 min. 8 mL of TEOS was dissolved in 100 mL of EtOH, ultrasonicated, and then added dropwise at a rate of 2 drops / s. After the addition was complete, the mixture was ultrasonically reacted for 4 h. The temperature was maintained below 30℃. After the reaction was complete, the Fe3O4@SiO2 magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain the Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in 30 mL of deionized water and ultrasonically vibrated for 8 min to redisperse it into a Fe3O4@SiO2 suspension. 1 mL of 0.1 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 10 min. 400 μL of freshly prepared 0.5 mol / L NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated for 15 min. The mixture was centrifuged at 8000 r / min, washed with deionized water, and the process was repeated several times until the supernatant was clear. The mixture was then freeze-dried to obtain the Fe3O4@SiO2@Ag composite material.
[0055] Step (3) Preparation of magnetic fibers:
[0056] Magnetic particles are ultrasonically dispersed in bamboo fibers for 20 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0057] The yarn is spun using a 50:50 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 18 hours.
[0058] The process parameters during spinning are as follows:
[0059] Spinneret specifications: SPN1400 × 0.07 mm
[0060] Spinning speed: 15 m / min
[0061] Stretch ratio: 1.4 times
[0062] Roller speed: 70 r / min
[0063] Two-roll speed: 100 r / min
[0064] Coagulation bath length: 1.0 m
[0065] Coagulation bath concentration: 30%.
[0066] Example 2
[0067] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0068] 1.2 g FeCl3, 3.1 g NaAc, and 0.2 g Na3CA were added to 12 mL of EG and 35 mL of LEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set at 190℃ for 8 h. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0069] Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0070] 1.1 g of Fe3O4 magnetic nanoparticles were dispersed in 710 mL of a mixed solvent (EtOH: H2O = 10:8), and 12 mL of NH3·H2O was added. The mixture was ultrasonically stirred for 30 min. 8 mL of TEOS was dissolved in 100 mL of EtOH, ultrasonicated, and then added dropwise at a rate of 3 drops / s. After the addition was complete, the mixture was ultrasonically reacted for 5 h. The temperature was maintained below 32℃. After the reaction was complete, the Fe3O4@SiO2 magnetic nanoparticles were collected using a magnet. They were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in 40 mL of deionized water and ultrasonically vibrated for 8 min to redisperse it into a Fe3O4@SiO2 suspension. 1 mL of a prepared 0.2 mol / L AgNO3 solution was added to the suspension, and the mixture was ultrasonically vibrated for 12 min. 450 μL of the 0.5% solution was then taken. Freshly prepared mol / L NaBH4 solution was added to Fe3O4@SiO2 suspension, ultrasonically vibrated for 16 min, centrifuged at 8500 r / min, washed with deionized water, and treated several times until the supernatant was clear. The supernatant was then freeze-dried to obtain Fe3O4@SiO2@Ag composite material.
[0071] Step (3) Preparation of magnetic fibers:
[0072] Magnetic particles are ultrasonically dispersed in bamboo fibers for 24 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0073] The yarn is spun using a 55:45 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 19 hours.
[0074] The process parameters during spinning are as follows:
[0075] Spinneret specifications: SPN1400 × 0.07 mm
[0076] Spinning speed: 15 m / min
[0077] Stretch ratio: 1.4 times
[0078] Roller speed: 72 r / min
[0079] Two-roll speed: 105 r / min
[0080] Coagulation bath length: 1.1m
[0081] Coagulation bath concentration: 35%.
[0082] Example 3
[0083] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0084] 1.3g FeCl3, 3.3g NaAc, and 0.3g Na3CA were added to 15 mL of EG and 40 mL of LEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set at 200℃ for 9 h. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0085] Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0086] 1.4 g of Fe3O4 magnetic nanoparticles were dispersed in 740 mL of a mixed solvent (EtOH: H2O = 12:9), and 14 mL of NH3·H2O was added. The mixture was ultrasonically stirred for 40 min. 9 mL of TEOS was dissolved in 100 mL of EtOH, ultrasonicated, and then added dropwise at a rate of 4 drops / s. After the addition was complete, the mixture was ultrasonically reacted for 5 h. The temperature was maintained below 34 °C. After the reaction was complete, the Fe3O4@SiO2 magnetic nanoparticles were collected using a magnet. The magnetic nanoparticles were continuously washed with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in 45 mL of deionized water and ultrasonically vibrated for 9 min to redisperse it into a Fe3O4@SiO2 suspension. 2 mL of 0.3 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 14 min. 470 μL of freshly prepared 0.7 mol / L NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated for 18 min. The mixture was centrifuged at 9000 r / min, washed with deionized water, and treated several times until the supernatant was clear. The mixture was then freeze-dried to collect the Fe3O4@SiO2@Ag composite material.
[0087] Step (3) Preparation of magnetic fibers:
[0088] Magnetic particles are ultrasonically dispersed in bamboo fibers for 26 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0089] The yarn is spun using a 60:40 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 20 hours.
[0090] The process parameters during spinning are as follows:
[0091] Spinneret specifications: SPN1400 × 0.07 mm
[0092] Spinning speed: 16 m / min
[0093] Stretch ratio: 1.6 times
[0094] Roller speed: 80 r / min
[0095] Two-roll speed: 100 r / min
[0096] Coagulation bath length: 1.4 m
[0097] Coagulation bath concentration: 50%.
[0098] Example 4
[0099] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0100] 1.5g FeCl3, 3.5g NaAc, and 0.5g Na3CA were added to 20 mL of EG and 50 mL of LEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set at 220℃ for 10 h. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0101] Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles:
[0102] 1.5 g of Fe3O4 magnetic nanoparticles were dispersed in 750 mL of a mixed solvent (EtOH: H2O = 15:14), and 15 mL of NH3·H2O was added. The mixture was ultrasonically stirred for 45 min. 10 mL of TEOS was dissolved in 100 mL of EtOH, and after ultrasonication, it was added dropwise at a rate of 5 drops / s. After the addition was complete, the mixture was ultrasonically reacted for 6 h. The temperature was maintained below 35 °C. After the reaction was completed, the Fe3O4@SiO2 magnetic nanoparticles were collected using a magnet. The magnetic nanoparticles were continuously washed with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4@SiO2 magnetic nanoparticle dispersion. The prepared Fe3O4@SiO2 composite material was dissolved in 50 mL of deionized water and ultrasonically vibrated for 10 min to redisperse it into a Fe3O4@SiO2 suspension. 3 mL of 0.3 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 15 min. 500 μL of freshly prepared 0.8 mol / L NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated for 20 min. The mixture was centrifuged at 10000 r / min, washed with deionized water, and treated several times until the supernatant was clear. The mixture was then freeze-dried to collect the Fe3O4@SiO2@Ag composite material.
[0103] Step (3) Preparation of magnetic fibers:
[0104] Magnetic particles are ultrasonically dispersed in bamboo fibers for 30 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0105] The yarn is spun using a 70:30 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 24 hours.
[0106] The process parameters during spinning are as follows:
[0107] Spinneret specifications: SPN1400 × 0.07 mm
[0108] Spinning speed: 16 m / min
[0109] Stretch ratio: 1.6 times
[0110] Roller speed: 80 r / min
[0111] Two-roll speed: 120 r / min
[0112] Coagulation bath length: 1.5 m
[0113] Coagulation bath concentration: 60%.
[0114] Comparative Example 1
[0115] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0116] 1.2g FeCl3, 3g NaAc, and 0.2g Na3CA were added to 10mL EG and 30mL LEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set to 180℃ for 8 hours. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0117] Step (2) Preparation of Fe3O4@SiO2 magnetic nanoparticles:
[0118] 1 g of Fe3O4 magnetic nanoparticles were dispersed in 700 mL of a mixed solvent (EtOH: H2O = 10:7), and 10 mL of NH3·H2O was added. The mixture was ultrasonically stirred for 25 min. 8 mL of TEOS was dissolved in 100 mL of EtOH, ultrasonicated, and then added dropwise at a rate of 2 drops / s. After the addition was complete, the mixture was ultrasonically reacted for 4 h. The temperature was maintained below 30℃. After the reaction was complete, the Fe3O4@SiO2 magnetic nanoparticles were collected using a magnet. They were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4@SiO2 magnetic nanoparticle dispersion.
[0119] Step (3) Preparation of magnetic fibers:
[0120] Magnetic particles are ultrasonically dispersed in bamboo fibers for 20 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0121] The yarn is spun using a 50:50 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 18 hours.
[0122] The process parameters during spinning are as follows:
[0123] Spinneret specifications: SPN1400 × 0.07 mm
[0124] Spinning speed: 15 m / min
[0125] Stretch ratio: 1.4 times
[0126] Roller speed: 70 r / min
[0127] Two-roll speed: 100 r / min
[0128] Coagulation bath length: 1.0m
[0129] Coagulation bath concentration: 30%.
[0130] Comparative Example 2
[0131] Step (1) Preparation of Fe3O4 magnetic nanoparticles:
[0132] 1.2g FeCl3, 3g NaAc, and 0.2g Na3CA were added to 10mL EG and 30mL LEG solution to obtain Fe 3+ Dispersion. The dispersion was added to a reaction vessel, which was set to 180℃ for 8 hours. The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected using a magnet. The nanoparticles were washed continuously with EtOH and H2O, and finally dispersed in H2O to obtain a Fe3O4 magnetic nanoparticle dispersion.
[0133] Step (2) Preparation of Fe3O4@Ag magnetic nanoparticles:
[0134] The prepared Fe3O4 material was dissolved in 30 mL of deionized water and ultrasonically vibrated for 8 min to redisperse it into a Fe3O4 suspension. 1 mL of 0.1 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 10 min. 400 μL of freshly prepared 0.5 mol / L NaBH4 solution was added to the Fe3O4 suspension and ultrasonically vibrated for 15 min. The suspension was then centrifuged at 8000 r / min, washed with deionized water, and the process was repeated several times until the supernatant was clear. After freeze-drying, the Fe3O4@Ag composite material was collected.
[0135] Step (3) Preparation of magnetic fibers:
[0136] Magnetic particles are ultrasonically dispersed in bamboo fibers for 20 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and then directly enters the prepared coagulation bath to react and form fiber bundles. Then, the fiber bundles are stretched and wound by front and rear stretching rollers.
[0137] The yarn is spun using a 50:50 blend of magnetic fiber and negative ion viscose fiber, through a process of beating, combing, drawing, roving, spinning, winding, doubling, and twisting. After roving, the yarn is placed in a constant temperature room for 18-24 hours.
[0138] The process parameters during spinning are as follows:
[0139] Spinneret specifications: SPN1400 × 0.07 mm
[0140] Spinning speed: 15 m / min
[0141] Stretch ratio: 1.4 times
[0142] Roller speed: 70 r / min
[0143] Two-roll speed: 100 r / min
[0144] Coagulation bath length: 1.0 m
[0145] Coagulation bath concentration: 30%.
[0146] Antibacterial performance test
[0147] According to national standards GB / T 20944.1-2007 "Evaluation of antimicrobial properties of textiles - Part 1: Agar diffusion method" and GB / T 20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Shaking method"
[0148] Breathability test
[0149] According to the national standard GB / T 5453-1997, "Determination of Air Permeability of Fabrics," the air permeability of the fabric was tested. This experiment used a YG461E air permeability tester to test the fabric. The experimental test area was 20 cm². 2 The pressure drop was 100 Pa. Under the same conditions, the air permeability of the same fabric sample was measured ten times at different locations, and the average value was taken to obtain the air permeability of each fabric.
[0150] Moisture permeability test
[0151] According to the national standard GB-T12704.1-2009 Test Method for Moisture Permeability of Fabrics, the moisture permeability of five fabrics was tested using a YG601H computer-controlled fabric moisture permeability meter, and the fabric moisture permeability rate was calculated.
[0152] Magnetic washability test
[0153] The magnetic washability test was conducted according to standard GB / T 8629-2017. Samples were cut into 20cm x 20cm pieces, with five pieces of each type of fabric. A 90cm x 90cm piece of pure cotton woven fabric was used as a wash companion. The samples were washed according to GB / T8629–2001 "Testing Procedures for Textiles – Household Washing and Drying," and then laid flat to dry. The surface magnetic induction intensity of the magnetic fabrics was tested using a CH-1600 fully digital high-precision teslameter. The surface magnetic induction intensity of each magnetic fabric was measured before and after washing.
[0154] Table 1 Fabric Specifications
[0155]
[0156] Table 2 Fabric Specifications
[0157]
[0158] Table 3 Antibacterial properties
[0159]
[0160] Table 1 shows that Example 4 has the best antibacterial effect, while Comparative Example 2 has a poorer effect. The Ag content in the material... + Through release, effective antibacterial effects are achieved. The negative ion fiber material has a strong electric field around it. Bacteria are killed or inhibited from dividing and proliferating due to the electric field and the microcurrent generated by the electric field. In addition, negative ions have high activity and strong redox effects, which can destroy the cell membrane of bacteria or the activity of cell protoplasmic enzymes, thereby killing bacteria. Negative ion health knitted fabric has a good antibacterial effect against Staphylococcus aureus and Escherichia coli.
[0161] Table 4. Air permeability
[0162]
[0163] Table 2 shows that Example 4 exhibits the best air permeability, while Comparative Example 2 shows the worst. Among fabrics woven from the same yarn, double-layer fabrics have better air permeability than single-layer fabrics. Although double-layer fabrics are thicker and denser than single-layer fabrics, the loft between layers in double-layer fabrics is better, and the density of the single layers in a double-layer fabric is lower than that of a single-layer fabric. This results in better air permeability of double-layer fabrics under a pressure difference of 100 Pa. In single-layer fabrics, although the yarn count and fabric density are the same, the air permeability varies depending on the type of yarn. This is mainly because the different materials contained in different types of yarns have different effects on the air permeability of the fabric.
[0164] Table 5 Moisture permeability
[0165]
[0166] Table 2 shows that Example 2 had the best effect, while Comparative Example 2 had a worse effect. Among fabrics woven from the same yarn, single-layer fabrics had better moisture permeability than double-layer fabrics. Although double-layer fabrics have better air permeability, facilitating water vapor passage, their thickness results in longer channels for water molecules to pass through, and the increased number of fiber contact points significantly hinders this passage. The porosity of double-layer fabrics has less impact on moisture permeability than their thickness. The internal structure of bamboo fiber, with its cross-section covered in elliptical pores and cracked edges, acts like capillaries, allowing for instantaneous absorption and evaporation of moisture, resulting in excellent moisture permeability in bamboo fiber fabrics.
[0167] Table 6 Magnetic induction intensity of fabric surface before and after washing
[0168]
[0169] As shown in the table, the washability of the examples was greater than that of the comparative examples. With increasing washing cycles, the magnetic induction intensity on the surface of the magnetic health fabric showed a certain degree of decrease, but the decrease was small and not significant, indicating that the permanent magnet nanoparticles within the magnetic fibers had strong adhesion and were not easily detached, resulting in good magnetic washability. Furthermore, due to the moisture absorption and swelling of the magnetic fibers after washing, the packing density of the magnetic nanoparticles changed, leading to uneven distribution of permanent magnet nanoparticles within the seamless knitted fabric. This resulted in more pronounced regional variations in the magnetic induction intensity on the fabric surface, with some areas having a higher accumulation of magnetic nanoparticles, thus enhancing the surface magnetic induction intensity of the fabric.
[0170] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. An antibacterial magnetic health care fabric, characterized in that, The preparation process includes: Step (1) Preparation of Fe3O4 magnetic nanoparticles: 10-20 mL of EG and 30-50 mL of LEG solution were added to 1.2-1.5 g FeCl3, 3-3.5 g NaAc, and 0.2-0.5 g Na3CA to obtain Fe... 3+ Dispersion; The dispersion was added to a reaction vessel, the temperature of which was set at 180~220℃, and the reaction time was 8~10h; The reaction vessel was cooled to room temperature, and the magnetic nanoparticles were collected with a magnet; The mixture was washed continuously with EtOH and H2O, and finally the magnetic nanoparticles were dispersed in H2O to obtain the Fe3O4 magnetic nanoparticle dispersion. Step (2) Preparation of Fe3O4@SiO2@Ag magnetic nanoparticles: Take 1~1.5g of Fe3O4 magnetic nanoparticles and disperse them in 700~750mL of mixed solvent (EtOH:H2O=10:7~15:14), add 10~15mL of NH3·H2O, and sonicate for 25~45min; dissolve 8~10mL of TEOS in 100mL of EtOH, sonicate, and then add it dropwise at a rate of 2~5 drops / s. After the addition is complete, sonicate for 4~6h; keep the temperature below 30~35℃; after the reaction is complete, collect the Fe3O4@SiO2 magnetic nanoparticles with a magnet; wash continuously with EtOH and H2O, and finally disperse the magnetic nanoparticles in H2O to obtain Fe3O4@SiO2 magnetic nanoparticles. Particle dispersion: The prepared Fe3O4@SiO2 composite material was dissolved in 30-50 mL of deionized water and ultrasonically vibrated for 8-10 min to redisperse it into a Fe3O4@SiO2 suspension. 1-3 mL of 0.1-0.3 mol / L AgNO3 solution was added to the suspension and ultrasonically vibrated for 10-15 min. 400-500 μL of freshly prepared 0.5-0.8 mol / L NaBH4 solution was added to the Fe3O4@SiO2 suspension and ultrasonically vibrated for 15-20 min. The mixture was centrifuged at 8000-10000 r / min, washed with deionized water, and treated several times until the supernatant was clear. The mixture was then freeze-dried to collect the Fe3O4@SiO2@Ag composite material. Step (3) Magnetic fiber preparation: Magnetic particles are ultrasonically dispersed in bamboo raw fibers for 20-30 minutes. The spinning solution is sprayed out of the spinneret using a wet spinning machine and directly enters the prepared coagulation bath to react and form a fiber bundle. Then, the fiber bundle is stretched and wound by front and rear stretching rollers. The process parameters selected in this spinning process are as follows: Spinneret specifications: SPN1400×0.07mm Spinning speed: 15~16m / min Draw ratio: 1.4~1.6 times Roller speed: 70~80 r / min Two-roll speed: 100~120 r / min Coagulation bath length: 1.0m~1.5m Coagulation bath concentration: 30%~60%; Step (4) Spinning: Beating—combing—drawing—roving—spinning—winding—drawing—twisting; The spinning process is as follows: The fiber materials are fed into a beater at a blending ratio of 50:50 to 70:30, repeated 3 to 5 times to ensure uniform mixing of different fiber materials; the uniformly mixed materials are combed using a carding machine; the combed sliver is drawn on a drawing frame to ensure uniform mixing of different fiber types and improve sliver uniformity; the drawn sliver is drafted and twisted on a roving frame to form roving, which is then placed in a constant temperature room for 18 to 24 hours; the roving is drafted and twisted on a spinning frame to form yarn; finally, the yarn is spun through winding, combining two single yarns, and doubling the twist. Step (5) Weaving: Using blended yarns of magnetic fiber and negative ion viscose fiber, and based on a 2 / 2 twill weave, single-layer and double-layer fabrics are developed. Each fabric has the same warp and weft yarns, and the density of the single layer in the double-layer fabric is lower than that of the single-layer fabric.
2. The antibacterial magnetic health care fabric according to claim 1, characterized in that, Step (4) Spinning: The spinning process is as follows: The fiber materials are fed into a beating machine at a blending ratio of 50:50 to 70:30, repeated 3 to 5 times to ensure uniform mixing of different fiber materials; the uniformly mixed materials are combed using an FB301 carding machine; the combed sliver is drawn 3 to 4 times on an FA306 drawing frame to ensure uniform mixing of different fiber types and improve sliver uniformity; the drawn sliver is drafted and twisted on a 458A roving frame to form roving, which is then placed in a constant temperature room for 18 to 24 hours; the roving is drafted and twisted on a 129 spinning frame to form yarn; finally, the yarn is spun through winding, two single yarns being combined, and double twisting.
3. The antibacterial magnetic health care fabric according to claim 1, characterized in that, The spinning winding process in step (4) mainly focuses on removing thick sections and impurities. Electronic yarn clearers and air twisters are used, and the process principle of low speed and minimal hair growth is adopted to reduce yarn tension and ensure smooth yarn passage.
4. The antibacterial magnetic health care fabric according to claim 1, characterized in that, The weaving process in step (5) adopts the process principle of medium tension, large opening, and late weft insertion.