Antibacterial shoe fabric and preparation method thereof

Abstract

The present application relates to the field of fabric textiles, and specifically discloses an antibacterial shoe fabric and its preparation method. An antibacterial shoe fabric comprises a blended fiber, nylon fiber and regenerated cellulose fiber in a mass ratio of 4:2-3:2-5, the blended fiber comprising an antibacterial super absorbent fiber as a core and a porous polylactic acid surface layer coated on the periphery of the antibacterial super absorbent fiber, the antibacterial super absorbent fiber comprising the following raw materials in parts by weight: 2-3 parts of porous graphite particles, 6-8 parts of polyvinyl alcohol, 0.3-0.4 parts of nanocellulose, 0.01-0.04 parts of polyethylene glycol, and 0.1-0.15 parts of nano zinc oxide. The antibacterial shoe fabric of the present application has the advantages of good antibacterial properties, excellent antibacterial durability, good wettability, low cleaning difficulty and short cleaning time.

Description

Technical Field

[0001] The present application relates to the field of fabric textile technology, and more specifically, to an antibacterial fabric for shoes and a preparation method thereof. Background Art

[0002] Shoes are an everyday necessity that has evolved with human evolution. In response to diverse needs and seasonal changes, there are an increasing number of shoe types, including sandals, single shoes, sneakers, and cotton-padded shoes. Because the feet are a crucial starting point for the circulation of Qi and blood, traversing the internal organs and meridians, the human body sweats from the soles of the feet after moderate exercise. Especially after strenuous exercise, the feet produce large quantities of sweat within the small, enclosed space of the shoes they wear. If this sweat isn't promptly removed, bacteria can breed in the damp shoes, leading to foot odor and athlete's foot, which in turn harms foot health. Currently, there's no effective way to eliminate these conditions other than maintaining hygiene and frequent scrubbing. However, to mitigate or partially eliminate these issues, antiseptic shoe uppers have emerged on the market. These uppers are often multi-layered, with a sterilizing layer between the bottom and top layers. This structure is complex, difficult to mold, and relatively thick, making it difficult to breathe.

[0003] In the prior art, patent application number CN2007100276721 discloses a nano-silver bamboo charcoal fiber, which is spun into fibers by mixing nano-silver with a viscose solution, and then woven into a shoe upper. However, the disadvantage of this structure is that the nano-silver is still not stable enough on the fiber, and there is a phenomenon of shedding, and the antibacterial durability is poor.

[0004] With respect to the above-mentioned related technologies, the inventors found that improving the antibacterial durability and breathability of the upper material is very necessary for regulating the microenvironment in which the foot lives in the shoe, inhibiting the production of bacteria, and ultimately protecting human health. Summary of the Invention

[0005] In order to improve the antibacterial durability and breathability of shoe upper materials, the present application provides an antibacterial shoe fabric and a preparation method thereof.

[0006] In a first aspect, the present application provides an antibacterial shoe fabric, which adopts the following technical solution:

[0007] An antibacterial shoe fabric comprises blended fibers, nylon fibers, and regenerated cellulose fibers in a mass ratio of 4:2-3:2-5. The blended fibers include an antibacterial superabsorbent fiber as a core and a porous polylactic acid surface layer coated around the antibacterial superabsorbent fiber. The antibacterial superabsorbent fiber comprises the following raw materials in parts by weight: 2-3 parts of porous graphite particles, 6-8 parts of polyvinyl alcohol, 0.3-0.4 parts of nanocellulose, 0.01-0.04 parts of polyethylene glycol, and 0.1-0.15 parts of nanozinc oxide.

[0008] By adopting the above technical solution, nylon fiber, regenerated cellulose fiber and blended fiber can be blended to form antibacterial shoe fabric. Regenerated cellulose fiber is made by dissolving and spinning cellulose in natural materials. It has the unique characteristics of natural materials and is an environmentally friendly fiber. It contains a large number of hydrophilic groups in its molecular structure, has good hygroscopicity, uniform fiber density, large pores and good air permeability. Nylon fiber has a smooth surface and good wear resistance and toughness, high elasticity and high tear strength. Blended fibers contain raw materials such as nanocellulose and polyvinyl alcohol, nano-oxygen Zinc oxide has the characteristics of low cost and good biodegradability. Under the irradiation of visible light or ultraviolet light, it produces phototoxicity and has a lethal effect on bacteria. It has good applicability in antibacterial and antimicrobial properties. The porous graphite particles are rich in pores and have strong adsorption properties, which can load nano zinc oxide. Polyvinyl alcohol and nano cellulose have high water absorption, so they can be mixed with polyvinyl alcohol nano cellulose to produce blended fibers with long-lasting antibacterial and good moisture absorption effects, thereby making antibacterial shoe fabrics with long-lasting antibacterial, moisture absorption and breathability.

[0009] Optionally, the method for preparing the antibacterial super absorbent fiber comprises the following steps:

[0010] The porous graphite particles are treated with alkali, washed, and dried to obtain pretreated porous graphite;

[0011] The pretreated porous graphite is added to a zinc chloride solution, impregnated, filtered, washed, and then added to a sodium hydroxide solution, heated to 110-120° C., kept warm for 18-20 hours, filtered, washed, and dried to obtain porous graphite particles loaded with zinc oxide;

[0012] Dissolving polyvinyl alcohol, adding nanocellulose and polyethylene glycol, mixing well, and then adding the zinc oxide-loaded porous graphite particles to prepare a spinning solution;

[0013] The spinning solution is electrospun to obtain spun fibers, which are then frozen at -(18-20)°C for 15-18 hours, thawed at 24-27°C for 3-4 hours, and subjected to 4-5 freeze-thaw cycles before being immersed in deionized water and dried to obtain antibacterial and highly absorbent fibers.

[0014] By adopting the above technical solution, the porous graphite particles have a rich pore structure, which is first treated with alkali solution to diffuse the pore structure without destroying the porous graphite particle structure, and then the porous graphite particles are mixed with zinc chloride solution. Under the action of sodium hydroxide solution, nano-zinc oxide is loaded in the porous graphite particles. Nano-zinc oxide has a good antibacterial effect on Escherichia coli and Staphylococcus aureus. The zinc oxide-loaded porous graphite particles are mixed with polyvinyl alcohol, nanocellulose and polyethylene glycol and then spun. Polyethylene glycol is used as a porogen and does not participate in the cross-linking reaction during the spinning process. During the freeze-thaw cycle, on the one hand, the intermolecular hydroxyl groups of polyvinyl alcohol form physical cross-links through hydrogen bonds, and on the other hand, polyvinyl alcohol and nanocellulose form physical cross-links through surface The hydroxyl groups form hydrogen bonds to form a cross-linking system, and polyethylene glycol occupies a certain volume in the system during the freeze-thaw cycle, thereby providing steric hindrance and affecting the cross-linking of polyvinyl alcohol and nanocellulose, thereby forming a porous structure during the phase separation process. On the other hand, the addition of nanocellulose promotes the formation of a network interpenetrating structure. Finally, the spun fiber is immersed in deionized water to remove polyethylene glycol to obtain an antibacterial and highly absorbent fiber with stable performance. The porous structure promotes the penetration of water molecules, and the porous structure provides more storage space for water molecules, and can also achieve a breathable effect, keeping the feet dry. The nano zinc oxide loaded in the porous graphite particles can be gradually released from the antibacterial and highly absorbent fiber, extending the antibacterial time and improving the antibacterial durability.

[0015] Optionally, the antibacterial super absorbent fiber is post-treated as follows: the antibacterial super absorbent fiber is immersed in a mixed solution including silk fibroin and PHMB, and then freeze-dried at -(35-40)°C for 5-6 hours, wherein the mixed solution includes silk fibroin, propylene glycol and PHMB in a mass ratio of 1:30-35:0.03-0.05.

[0016] By adopting the above technical solution, nano zinc oxide produces an antibacterial effect under visible light and ultraviolet light irradiation, but the antibacterial rate is poor under the action of no ultraviolet light or visible light. Therefore, on the surface of the antibacterial super absorbent fiber, a mixed solution of silk fibroin and PHMB (polyhexamethylene biguanide hydrochloride) is impregnated and then freeze-dried to form a porous antibacterial material layer. The interior of the porous antibacterial material layer is porous, and PHMB is evenly loaded in the porous antibacterial material layer. Moreover, the addition of PHMB reduces the electrostatic repulsion between the systems and improves the connectivity between the pores, which is convenient for PHM B is released; there is an electrostatic interaction between the negative charge of silk fibroin and the positive charge of PHMB. The PHMB loaded into the porous antibacterial material layer can overcome the constraints of silk fibroin and be fully released. PHMB has excellent antibacterial ability against Staphylococcus aureus, Escherichia coli, etc., thereby improving the initial antibacterial power of the antibacterial super absorbent fiber and increasing its antibacterial durability. Moreover, it has good antibacterial properties in the absence of visible light irradiation. The holes of the porous antibacterial material layer and the antibacterial super absorbent fiber form a hole nested structure, which can prolong the sustained release time of nano zinc oxide in the antibacterial super absorbent fiber.

[0017] Optionally, the method for preparing the blended fiber comprises the following steps:

[0018] Dissolving polylactic acid in dichloromethane to prepare a coating solution with a concentration of 1-3 wt%;

[0019] The coating liquid is coated on the surface of the antibacterial high water-absorbent fiber, placed in an environment with a temperature of 30-35° C. and a humidity of 70-75% RH for 10-12 hours, and then vacuum dried.

[0020] By adopting the above technical solution, using dichloromethane as the solvent, which has a low boiling point and evaporates quickly, it can form a sufficient temperature difference to condense water vapor in the environment into the solution, forming a pore structure with a larger pore size, larger pore spacing, and irregular arrangement. The nano-zinc oxide in the antibacterial and highly absorbent fiber diffuses out through the pores, achieving a long-lasting antibacterial effect.

[0021] Optionally, the coating amount of the coating liquid is 0.5-5% of the weight of the antibacterial high water-absorbent fiber.

[0022] By adopting the above technical solution, a coating liquid of 0.5-5% by weight of the antibacterial super absorbent fiber can form a porous polylactic acid layer of appropriate thickness on the surface of the antibacterial super absorbent fiber, thereby not affecting the elasticity of the antibacterial super absorbent fiber and improving the tear resistance of the antibacterial super absorbent fiber.

[0023] Optionally, the porous graphite particles are made by mixing the following raw materials in parts by weight, extruding at 160-180° C., drying, and crushing: 8-9 parts of polyvinyl acetate emulsion, 0.2-0.4 parts of bamboo fiber, 2-4 parts of water, 1-2 parts of expanded graphite, 0.1-0.2 parts of nanosilver, and 0.1-0.2 parts of urea.

[0024] By adopting the above technical solution, polyvinyl acetate emulsion is used as a binder, and water initially occupies a certain volume and becomes pores after drying, so that porous graphite particles with rich pores are obtained after extrusion. Bamboo fiber is used as a reinforcing material and is directionally arranged in the porous graphite particles along the extrusion direction, thereby improving the strength of the porous graphite particles. Urea is used as a porogen and is volatilized during extrusion to produce carbon dioxide and ammonia, which can form a porous structure on the polyvinyl acetate emulsion to prevent the emulsion from sealing the pores of the porous graphite particles, thereby reducing the moisture absorption and air permeability of the porous graphite particles. The addition of nanosilver gives the porous graphite particles antibacterial ability.

[0025] Optionally, the nylon fiber is pretreated as follows: the nylon fiber is plasma treated and then placed in an HPMAS solution with a concentration of 8-10wt%, immersed for 10-20 minutes, taken out, dried, plasma treated, placed in distilled water, boiled for 3-4 hours, then placed in a sodium hydroxide solution for neutralization, repeatedly washed with distilled water, and dried.

[0026] By adopting the above technical solution, nylon fiber is a chemical fiber product with water repellency, but the fabric has insufficient moisture absorption and relatively poor air permeability. As a result, when shoes made of antibacterial shoe fabric are washed, water is not easy to penetrate into the fiber gaps, and dirt is difficult to remove. The nylon fiber is first treated with plasma to etch the nylon fiber surface, thereby increasing the roughness and specific surface area of ​​the nylon fiber surface. At the same time, during the plasma treatment, oxygen and nitrogen in the air are excited to produce oxygen-containing and nitrogen-containing hydrophilic polar groups, thereby significantly improving the hydrophilicity of the nylon fiber surface and improving the wettability of the nylon fiber. The nylon fiber is then immersed in an HPMAS solution. Sodium methacrylate hydroxypropyl sulfonate (HPMAS) contains -OH and -SO3 and has good water solubility. Under the action of plasma, monomer grafting is initiated, and HPMAS is fixed to the nylon fiber surface in the form of chemical bonds, thereby improving the hydrophilicity and antistatic properties of the nylon fiber.

[0027] Optionally, the regenerated cellulose fiber is selected from at least one of cotton linter fiber, bamboo fiber, hemp fiber, bagasse fiber, and reed fiber.

[0028] In a second aspect, the present application provides a method for preparing an antibacterial shoe fabric, which adopts the following technical solution:

[0029] A method for preparing an antibacterial shoe fabric comprises the following steps:

[0030] The antibacterial shoe fabric is prepared by opening, blending and post-processing the blended fiber, regenerated cellulose fiber and nylon fiber.

[0031] By adopting the above technical solution, antibacterial shoe fabric is prepared through opening, blending and post-processing. The preparation method is simple and the prepared fabric has long-lasting antibacterial properties, excellent moisture absorption and breathability.

[0032] Optionally, the post-treatment is sequentially heat stretching treatment, water washing treatment, and heat setting treatment.

[0033] By adopting the above technical solution, post-processing increases the stability of the fabric, prolongs its service life, and prevents the fabric from shrinking.

[0034] Optionally, the heat setting treatment temperature is 50-80° C., and the setting time is 15-20 seconds.

[0035] In summary, this application has the following beneficial effects:

[0036] 1. Since the present application adopts nylon fiber, regenerated cellulose and blended fiber to prepare antibacterial shoe fabric, nylon fiber has good wear resistance and strong mechanical strength, regenerated cellulose fiber has strong hygroscopicity and air permeability, and the blended fiber consists of antibacterial super absorbent fiber and a porous polylactic acid layer covering its periphery. The antibacterial super absorbent fiber is made of porous graphite particles, nano zinc oxide, polyvinyl alcohol and other components. Nano zinc oxide has strong antibacterial properties, and porous graphite particles can prolong the release time of nano zinc oxide and prolong the antibacterial properties. The fibers formed by polyvinyl alcohol and nano cellulose have strong hygroscopicity and air permeability. Therefore, the shoe fabric prepared has strong hydrophilicity, wettability, air permeability and long-lasting antibacterial properties.

[0037] 2. In this application, a mixture of silk fibroin and PHMB is preferably used to post-treat the antibacterial super absorbent fiber to form an antibacterial porous material layer on the antibacterial super absorbent fiber, which forms a nested structure with the porous structure on the antibacterial super absorbent fiber and the pore structure of the porous graphite particles, thereby extending the release path of the antibacterial nano-zinc oxide and extending the antibacterial effect. PHMB can improve the initial antibacterial rate of the antibacterial fabric.

[0038] 3. In this application, plasma treatment and HPMAS solution are preferably used to treat nylon fibers, which can improve the roughness and specific surface area of ​​the nylon fiber surface, and graft HPMAS monomers on its surface, thereby further improving the hydrophilicity and wettability of the nylon fiber, so that when the upper material is cleaned, water can quickly penetrate into the fiber gaps, reducing the difficulty of cleaning and shortening the cleaning time. DETAILED DESCRIPTION

[0039] Preparation Examples 1-8 of Antibacterial Superabsorbent Fiber

[0040] Preparation Example 1: (1) 3 kg of porous graphite particles were treated with alkali, washed, and dried to obtain pretreated porous graphite. The alkali treatment process was as follows: the porous graphite particles were placed in a sodium hydroxide solution with a concentration of 5 wt%, reacted at 80° C. for 1 h, filtered, washed, and dried. The porous graphite particles were mixed with 2 kg of expanded graphite, 9 kg of polyvinyl acetate emulsion, 0.4 kg of bamboo fiber, 4 kg of water, 0.2 kg of nanosilver, and 0.2 kg of urea, extruded at 180° C., dried, and crushed into particles with a diameter of 1 μm. The extrusion speed was 8 mm / s. The expandable graphite particles had a particle size of 50 mesh and a carbon content of 99%. The solid content of the polyvinyl acetate emulsion was 50%. The bamboo fiber had a diameter of 7 μm and a length of 5 mm.

[0041] (2) adding the pretreated porous graphite to a 45 wt% zinc chloride solution prepared from 0.15 kg of zinc chloride, immersing, filtering, washing, and then adding the solution to a sodium hydroxide solution with a pH value of 12, heating the solution to 120° C., keeping the temperature for 18 h, filtering, washing, and drying to obtain porous graphite particles loaded with zinc oxide;

[0042] (3) dissolving 8 kg of polyvinyl alcohol to prepare a solution with a concentration of 20 wt%, adding 0.4 kg of nanocellulose and 0.04 kg of polyethylene glycol, mixing well, and then adding zinc oxide-loaded porous graphite particles to prepare a spinning solution;

[0043] (4) The spinning solution was electrospun to obtain spun fibers, which were then frozen at -18°C for 18 h, thawed at 24°C for 4 h, and subjected to 5 freeze-thaw cycles. The fibers were then immersed in deionized water and dried to obtain antibacterial and highly absorbent fibers. The electrospinning voltage was 25 kV, the distance between the collecting plates was 15 cm, and the spinning solution flow rate was 0.2 ml / h.

[0044] (5) The antibacterial super absorbent fiber prepared in step (4) was subjected to the following treatment: the antibacterial super absorbent fiber was immersed in a mixed solution prepared by mixing silk fibroin, propylene glycol and PHMB, and then freeze-dried at -35°C for 5 hours, wherein the mixed solution included silk fibroin, propylene glycol and PHMB in a mass ratio of 1:30:0.03.

[0045] Preparation Example 2: (1) 2 kg of porous graphite particles were treated with alkali, washed, and dried to obtain pretreated porous graphite. The alkali treatment process was as follows: the porous graphite particles were placed in a sodium hydroxide solution with a concentration of 5 wt%, reacted at 80° C. for 1 h, filtered, washed, and dried. The porous graphite particles were mixed with 1 kg of expanded graphite, 8 kg of polyvinyl acetate emulsion, 0.2 kg of bamboo fiber, 2 kg of water, 0.1 kg of nanosilver, and 0.1 kg of urea, extruded at 160° C., dried, and crushed into particles with a diameter of 3 μm. The extrusion speed was 8 mm / s. The expandable graphite particles had a particle size of 50 mesh and a carbon content of 99%. The solid content of the polyvinyl acetate emulsion was 50%. The bamboo fiber had a diameter of 7 μm and a length of 5 mm.

[0046] (2) adding the pretreated porous graphite to a 45 wt% zinc chloride solution prepared from 0.1 kg of zinc chloride, immersing, filtering, washing, and then adding the solution to a sodium hydroxide solution with a pH value of 12, heating the solution to 110° C., keeping the temperature for 20 h, filtering, washing, and drying to obtain porous graphite particles loaded with zinc oxide;

[0047] (3) dissolving 6 kg of polyvinyl alcohol to prepare a solution with a concentration of 20 wt%, adding 0.3 kg of nanocellulose and 0.01 kg of polyethylene glycol, mixing well, and then adding zinc oxide-loaded porous graphite particles to prepare a spinning solution;

[0048] (4) The spinning solution was electrospun to obtain spun fibers, which were then frozen at -20°C for 15 h, thawed at 27°C for 3 h, and subjected to four freeze-thaw cycles. The fibers were then immersed in deionized water and dried to obtain antibacterial and highly absorbent fibers. The electrospinning voltage was 25 kV, the distance between the collecting plates was 15 cm, and the spinning solution flow rate was 0.2 ml / h.

[0049] (5) The antibacterial super absorbent fiber prepared in step (4) was subjected to the following treatment: the antibacterial super absorbent fiber was immersed in a mixed solution prepared by mixing silk fibroin, propylene glycol and PHMB, and then freeze-dried at -40°C for 6 hours, wherein the mixed solution included silk fibroin, propylene glycol and PHMB in a mass ratio of 1:35:0.05.

[0050] Preparation Example 3: The difference from Preparation Example 1 is that step (5) was not performed.

[0051] Preparation Example 4: The difference from Preparation Example 1 is that PHMB is not added in step (5).

[0052] Preparation Example 5: The difference from Preparation Example 1 is that no urea is added to the raw materials of the porous graphite particles.

[0053] Preparation Example 6: The difference from Preparation Example 1 is that bamboo fiber is not added to the raw materials of the porous graphite particles.

[0054] Preparation Example 7: The difference from Preparation Example 1 is that no nanosilver is added to the raw materials of the porous graphite particles.

[0055] Preparation Example 8: (1) 8 kg of polyvinyl alcohol was dissolved to prepare a solution with a concentration of 20 wt%, 0.4 kg of nanocellulose and 0.04 kg of polyethylene glycol were added, and after mixing, 0.15 kg of zinc oxide was added to prepare a spinning solution;

[0056] (2) The spinning solution was electrospun to obtain spinning fibers, which were frozen at -18°C for 18 h, thawed at 24°C for 4 h, and subjected to 5 freeze-thaw cycles. The fibers were then immersed in deionized water and dried to obtain antibacterial and highly absorbent fibers. The electrospinning voltage was 25 kV, the collecting plate distance was 15 cm, and the spinning solution flow rate was 0.2 ml / h.

[0057] Example

[0058] Example 1: An antibacterial shoe fabric, comprising a blended fiber, nylon fiber and regenerated cellulose fiber in a mass ratio of 4:3:5, the nylon fiber having a linear density of 3D and a length of 51 mm, the regenerated cellulose fiber being bagasse fiber with a length of 2 mm and a width of 21 μm, the blended fiber comprising an antibacterial super absorbent fiber as a core and a porous polylactic acid surface coated on the periphery of the antibacterial super absorbent fiber, the antibacterial super absorbent fiber being prepared according to Preparation Example 1, and the preparation method of the blended fiber being as follows: polylactic acid with a relative molecular weight of 85 kDa being dissolved in dichloromethane to prepare a coating liquid with a concentration of 3 wt%, the coating liquid being evenly coated on the surface of the antibacterial super absorbent fiber, the coating liquid being placed in an environment with a temperature of 35°C and a humidity of 75% RH for 12 h, and being vacuum dried at 50°C for 1.5 h, the coating amount of the coating liquid being 5% of the weight of the antibacterial super absorbent fiber, and the humidity being controlled by a saturated aqueous solution of potassium carbonate.

[0059] The method for preparing the antibacterial shoe fabric comprises the following steps:

[0060] The blended fibers, regenerated cellulose fibers and nylon fibers were opened, blended, hot-stretched, washed and heat-set to produce an antibacterial shoe fabric with a warp density of 80 yarns / cm and a weft density of 90 yarns / cm. The hot-stretching treatment was a three-stage hot-stretching treatment, with the first-stage hot-stretching temperature being 100°C, the second-stage hot-stretching temperature being 110°C, and the third-stage hot-stretching temperature being 125°C. The washing temperature was 50°C and the washing time was 1 min. The heat-setting treatment was carried out under vacuum conditions at a temperature of 50°C and a time of 20 s.

[0061] Example 2: An antibacterial shoe fabric, comprising a blended fiber, nylon fiber and regenerated cellulose fiber in a mass ratio of 4:2:2, the blended fiber comprising an antibacterial super absorbent fiber as a core and a porous polylactic acid surface coated on the periphery of the antibacterial super absorbent fiber, the antibacterial super absorbent fiber being prepared according to Preparation Example 2, and the preparation method of the blended fiber being as follows: polylactic acid being dissolved in dichloromethane to prepare a coating liquid with a concentration of 1wt%, the coating liquid being evenly coated on the surface of the antibacterial super absorbent fiber, the fiber being placed in an environment with a temperature of 30°C and a humidity of 70% RH for 10 hours, and being vacuum dried at 50°C for 1.5 hours, and the coating amount of the coating liquid being 0.5% of the weight of the antibacterial super absorbent fiber.

[0062] The method for preparing the antibacterial shoe fabric comprises the following steps:

[0063] The blended fibers, regenerated cellulose fibers and nylon fibers were opened, blended, hot-stretched, washed and heat-set to produce an antibacterial shoe fabric with a warp density of 80 yarns / cm and a weft density of 90 yarns / cm. The hot-stretching treatment was a three-stage hot-stretching treatment, with the first-stage hot-stretching temperature being 100°C, the second-stage hot-stretching temperature being 110°C, and the third-stage hot-stretching temperature being 125°C. The washing temperature was 50°C and the washing time was 1 min. The heat-setting treatment was carried out under vacuum conditions at a temperature of 50°C and a time of 20 s.

[0064] Example 3: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial high water-absorbent fiber is made from Preparation Example 3.

[0065] Example 4: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial high water-absorbent fiber is made from Preparation Example 4.

[0066] Example 5: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial high-absorbent fiber is made from Preparation Example 5.

[0067] Example 6: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial high water-absorbent fiber is made from Preparation Example 6.

[0068] Example 7: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial high water-absorbent fiber is made from Preparation Example 7.

[0069] Example 8: An antibacterial shoe fabric, which differs from Example 1 in that the nylon fiber is pretreated as follows: the nylon fiber is plasma-treated and then immersed in a 10wt% HPMAS solution for 20 minutes, the plasma treatment discharge time is 3 minutes, the plate spacing is 2 mm, and the discharge power is 60W; then the nylon fiber is taken out, dried, plasma-treated, placed in distilled water, boiled for 4 hours, and then placed in a 10wt% sodium hydroxide solution for neutralization for 1 hour, repeatedly washed with distilled water, and dried. The plasma treatment time is 6 minutes, the plate spacing is 3 mm, the discharge power is 60W, and the argon concentration is 40%.

[0070] Example 9: An antibacterial shoe fabric, which differs from Example 1 in that the nylon fiber is pretreated as follows: the nylon fiber is plasma-treated and then immersed in an 8wt% HPMAS solution for 10 minutes, the discharge time of the plasma treatment is 3 minutes, the plate spacing is 2 mm, and the discharge power is 60 W; then the nylon fiber is taken out, dried, plasma-treated, placed in distilled water, boiled for 3 hours, and then placed in an 8wt% sodium hydroxide solution for neutralization for 1 hour, repeatedly washed with distilled water, and dried. The plasma treatment time is 6 minutes, the plate spacing is 3 mm, the discharge power is 60 W, and the argon concentration is 40%.

[0071] Example 10: An antibacterial shoe fabric, which differs from Example 8 in that the nylon fiber is not plasma treated, but is directly immersed in a 10wt% HPMAS solution for 20 minutes, then taken out, dried, plasma treated, placed in distilled water, boiled for 4 hours, and then placed in a 10wt% sodium hydroxide solution for neutralization for 1 hour, repeatedly washed with distilled water, and dried. The plasma treatment time is 6 minutes, the plate spacing is 3 mm, the discharge power is 60 W, and the argon concentration is 40%.

[0072] Example 11: An antibacterial shoe fabric, which differs from Example 8 in that the nylon fiber is only plasma-treated and is not impregnated with an HPMAS solution and then plasma-treated.

[0073] Comparative Example

[0074] Comparative Example 1: An antibacterial shoe fabric, which differs from Example 1 in that no blended fiber is added.

[0075] Comparative Example 2: An antibacterial shoe fabric, which differs from Example 1 in that the blended fiber is an antibacterial super absorbent fiber, and the antibacterial super absorbent fiber is coated with a porous polylactic acid surface layer.

[0076] Comparative Example 3: An antibacterial shoe fabric, which differs from Example 1 in that the antibacterial and highly absorbent fiber in the blended fiber is made from Preparation Example 8.

[0077] Comparative Example 4: An antibacterial fabric is made by blending the following raw materials in parts by weight: 85 parts of bamboo fiber, 30 parts of chitosan fiber, 30 parts of protein fiber, 10 parts of polylactic acid fiber, and 10 parts of silver ion seaweed fiber, wherein the protein fiber is soy protein, and the silver ion seaweed fiber contains 2% silver salt by weight.

[0078] Performance testing

[0079] Antibacterial shoe fabrics were prepared according to the methods in the examples and comparative examples, and the performance of the antibacterial shoe fabrics was tested according to the following method. The test results are recorded in Table 1.

[0080] 1. Antibacterial rate: tested in accordance with GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method";

[0081] 2. Instant Moisture Absorption Time: Refer to AATCC Test Method 39-1971, place the sample fabric flat on a support frame without tension, fix an alkaline burette vertically above it, and keep the lower end of the burette 1.5 cm away from the sample fabric. Drop distilled water onto the sample fabric and start timing. Observe the flattening and spreading of the liquid film until the reflected light on the liquid film disappears. Use a stopwatch to record this time, which is called the wetting time. The shorter the time, the better the wetting performance of the sample fabric. Measure 5 points on each sample and take the average value.

[0082] Table 1 Performance test of antibacterial shoe fabrics

[0083]

[0084] In Example 1 and Example 2, the antibacterial and highly absorbent fibers prepared in Preparation Example 1 and Preparation Example 2 are respectively used as the core of the blended fiber, and a porous polylactic acid surface layer is coated on the periphery of the core. The blended fibers prepared are blended with nylon fibers and regenerated cellulose fibers to produce antibacterial shoe fabrics with high initial antibacterial properties, high antibacterial rates after washing, good antibacterial effects, relatively long-lasting bactericidal effects, and good hygroscopicity.

[0085] Compared with Example 1, Examples 3 and 4 used the antibacterial super absorbent fibers prepared in Preparation Examples 3 and 4, respectively. Compared with Preparation Example 1, Preparation Example 3 did not perform post-treatment on the antibacterial super absorbent fiber. Compared with Preparation Example 1, Preparation Example 4 did not add PHMB when post-treating the antibacterial super absorbent fiber. Table 1 shows that the initial antibacterial rate of the antibacterial shoe fabrics prepared in Examples 3 and 4 decreased slightly. After washing 50 times, the antibacterial rate decreased significantly, and the decrease was most obvious in Example 3, indicating that the preparation of porous silk material on the antibacterial super absorbent fiber can prolong the antibacterial rate of the antibacterial shoe fabric.

[0086] In Example 5, the antibacterial super absorbent fiber prepared in Preparation Example 5 was used. Compared with Preparation Example 1, no urea was added when preparing the porous graphite particles. Table 1 shows that the initial antibacterial rate of the antibacterial shoe fabric prepared in Example 5 was similar to that in Example 1. However, after washing 50 times, the antibacterial rate decreased significantly and the antibacterial persistence weakened.

[0087] Example 6 Compared with Example 1, the antibacterial super absorbent fiber is made from Preparation Example 6, wherein no bamboo fiber is added. The moisture absorption time of the antibacterial Xie Yong fabric is increased and the hydrophilicity is decreased.

[0088] In Example 7, the antibacterial superabsorbent fiber prepared in Preparation Example 7 was used. No nanosilver was added when preparing the porous graphite particles in Preparation Example 7. Table 1 shows that the initial antibacterial rate of the antibacterial shoe fabric prepared in Example 7 decreased, but after washing 50 times, the decrease rate of the antibacterial ability was similar to that in Example 1.

[0089] Compared with Example 1, Examples 8 and 9 further pretreated the nylon fibers. Table 1 shows that the antibacterial shoe fabrics prepared in Examples 8 and 9 have good antibacterial rates and antibacterial durability, and good hydrophilicity. Washing water can easily penetrate into the gaps between fibers, reducing the difficulty of cleaning.

[0090] Compared with Example 8, in Example 10 and Example 11, the nylon fiber was not pre-plasma treated in Example 10, and the nylon fiber was plasma treated in Example 11 but not immersed in the HPMAS solution and plasma treated. The antibacterial rates of the antibacterial footwear fabrics prepared in Examples 10 and 11 did not change much, but the wetting time was shortened, the hydrophilicity was improved, and it was easier to wet.

[0091] The antibacterial shoe fabric prepared in Comparative Example 1 does not contain any blended fibers. Table 1 shows that the antibacterial ability of the antibacterial shoe fabric prepared in Comparative Example 1 is significantly weakened.

[0092] Compared with Example 1, Comparative Example 2 only uses antibacterial and highly absorbent fibers as blended fibers without covering the porous polylactic acid surface layer. Although the initial antibacterial rate of the antibacterial shoe fabric is high, after washing 50 times, the antibacterial rate decreases significantly and the antibacterial durability weakens.

[0093] The antibacterial and highly absorbent fiber in Comparative Example 3 is the antibacterial and highly absorbent fiber prepared in Preparation Example 8, to which no porous graphite particles are added. Table 1 shows that the initial antibacterial rate of the antibacterial shoe fabric prepared in Example 8 is lower than that in Example 1, and after washing 50 times, the antibacterial rate decreases significantly, and the antibacterial persistence weakens.

[0094] Comparative Example 4 is an antibacterial shoe fabric prepared by the prior art, which has a high initial antibacterial effect, but after washing, the antibacterial ability is weakened and the antibacterial durability is insufficient.

[0095] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An antibacterial shoe fabric, characterized in that: The invention relates to a blended fiber, nylon fiber and regenerated cellulose fiber in a mass ratio of 4:2-3:2-5, wherein the blended fiber comprises an antibacterial super absorbent fiber as a core and a porous polylactic acid surface layer coated on the periphery of the antibacterial super absorbent fiber. The antibacterial super absorbent fiber comprises the following raw materials in parts by weight: 2-3 parts of porous graphite particles, 6-8 parts of polyvinyl alcohol, 0.3-0.4 parts of nanocellulose, 0.01-0.04 parts of polyethylene glycol and 0.1-0.15 parts of nano zinc oxide. The method for preparing the antibacterial super absorbent fiber comprises the following steps: The porous graphite particles are treated with alkali, washed, and dried to obtain pretreated porous graphite; The pretreated porous graphite is added to a zinc chloride solution, impregnated, filtered, washed, and then added to a sodium hydroxide solution, heated to 110-120° C., kept warm for 18-20 hours, filtered, washed, and dried to obtain porous graphite particles loaded with zinc oxide; Dissolving polyvinyl alcohol, adding nanocellulose and polyethylene glycol, mixing well, and then adding the zinc oxide-loaded porous graphite particles to prepare a spinning solution; The spinning solution is subjected to electrostatic spinning to obtain spun fibers, the spun fibers are frozen at -(18-20)°C for 15-18 hours, thawed at 24-27°C for 3-4 hours, subjected to freeze-thaw cycles 4-5 times, immersed in deionized water, and dried to obtain antibacterial and highly absorbent fibers; The antibacterial super absorbent fiber is post-treated as follows: the antibacterial super absorbent fiber is immersed in a mixed solution, and then freeze-dried at -(35-40)°C for 5-6 hours, wherein the mixed solution includes silk fibroin, glycerol and PHMB in a mass ratio of 1:30-35:0.03-0.05; The nylon fiber is pretreated as follows: the nylon fiber is placed in a HPMAS solution with a concentration of 8-10wt% after plasma treatment, immersed for 10-20 minutes, taken out, dried, and subjected to a secondary plasma treatment, placed in distilled water, boiled for 3-4 hours, then placed in a sodium hydroxide solution for neutralization, repeatedly washed with distilled water, and dried.

2. The antibacterial shoe fabric according to claim 1, characterized in that: The preparation method of the blended fiber comprises the following steps: Dissolve polylactic acid in dichloromethane to prepare a coating solution with a concentration of 1-3 wt%; The coating liquid is coated on the surface of the antibacterial super absorbent fiber treated with the mixed solution, placed in an environment with a temperature of 30-35° C. and a humidity of 70-75% RH for 10-12 hours, and then vacuum dried.

3. The antibacterial shoe fabric according to claim 2, characterized in that: The coating amount of the coating liquid is 0.5-5% of the weight of the antibacterial super absorbent fiber.

4. The antibacterial shoe fabric according to claim 1, characterized in that: The porous graphite particles are prepared by mixing the following raw materials in parts by weight, extruding at 160-180° C., drying, and crushing: 8-9 parts of polyvinyl acetate emulsion, 0.2-0.4 parts of bamboo fiber, 2-4 parts of water, 1-2 parts of expanded graphite, 0.1-0.2 parts of nanosilver, and 0.1-0.2 parts of urea.

5. The method for preparing the antibacterial shoe fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: The antibacterial shoe fabric is prepared by opening, blending and post-processing the blended fiber, regenerated cellulose fiber and nylon fiber.

6. The method for preparing the antibacterial shoe fabric according to claim 5, characterized in that: The post-treatment is sequentially heat-stretching treatment, water-washing treatment and heat-setting treatment.

7. The method for preparing the antibacterial shoe fabric according to claim 6, characterized in that: The heat setting treatment temperature is 50-80° C., and the setting time is 15-20 seconds.

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