Antibacterial moisture-absorbing fiber fabric and preparation method thereof

Abstract

The invention discloses an antibacterial moisture-absorbing fiber fabric and a preparation method thereof, and relates to the technical field of fiber fabrics, the antibacterial moisture-absorbing fiber fabric comprises bacterial cellulose-based antibacterial fibers and polyurethane-based fibers, and the bacterial cellulose-based antibacterial fibers and the polyurethane-based fibers are interwoven to form the fiber fabric. The shell spinning solution is prepared from gelatin, ethyl cellulose and O-quaternary ammonium salt chitosan, the shell spinning solution is prepared from PPC-based polyurethane, and the core-shell structure polyurethane-based fiber is prepared through biaxial spinning, so that the production of the antibacterial, durable and moisture-absorbing fabric is realized, the problem that the fabric is uncomfortable in a humid environment is solved, and the antibacterial, durable and moisture-absorbing fabric is prepared. The durability and the antibacterial property of the fabric are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber fabrics, in particular to an antibacterial and moisture-absorbing fiber fabric and a preparation method thereof. BACKGROUND

[0002] In the medical field, a high antibacterial rate is required to reduce the risk of infection, in the home field, mildew and bacteria are required to be inhibited, and in sports clothing, long-term odor resistance is required. In addition, bacteria are easy to breed in high humidity and hot environment, which poses a threat to human health.

[0003] Traditional synthetic fibers such as polyester have poor moisture absorption, and bacteria are easy to breed in retained sweat, causing a stuffy feeling. In the scenarios of sports underwear and outdoor clothing, the fabric is required to quickly conduct moisture and inhibit microbial reproduction, and both moisture absorption and antibacterial functions need to be considered.

[0004] Patent CN112481731B discloses a copper ion antibacterial fiber and antibacterial fabric. The above-mentioned patent can achieve effective antibacterial effect under the premise of extremely low copper particle load, has good mechanical properties and washing resistance, and can be effectively applied to the medical field.

[0005] The above-mentioned patent combines copper particles with nano-porous phosphorus-containing borosilicate ceramic powder with far infrared emission capability, solves the problem that in the prior art, in order to achieve high antibacterial effect, a large amount of antibacterial agent needs to be added, but there is still room for optimization in the application of humid environment. The present application realizes the production of antibacterial, durable and moisture-absorbing fabric, and solves the problem of discomfort of the fabric in a humid environment.

[0006] Therefore, the present application provides an antibacterial and moisture-absorbing fiber fabric and a preparation method thereof, which realizes the production of antibacterial, durable and moisture-absorbing fabric. SUMMARY

[0007] The present application aims to provide an antibacterial and moisture-absorbing fiber fabric and a preparation method thereof to solve the technical problem of discomfort of the fabric in a humid environment as described in the background.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an antibacterial and moisture-absorbing fiber fabric, comprising bacterial cellulose-based antibacterial fiber and polyurethane-based fiber, the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber are interwoven into a fiber fabric, and the preparation method of the polyurethane-based fiber comprises the following steps:

[0009] Gelatin and ethyl cellulose are added to hexafluoroisopropanol, heated to 35℃, and stirred to prepare a pre-solution with a mass fraction of 5-10%, and 0.1-3wt% of O-quaternary ammonium salt chitosan is added to the pre-solution to prepare a shell spinning solution;

[0010] The PPC-based polyurethane particles are dissolved in hexafluoroisopropanol and heated and stirred until completely dissolved to prepare a core layer spinning solution with a mass fraction of 2-8%;

[0011] The shell layer spinning solution and the core layer spinning solution are respectively injected into injectors of a coaxial spinning device, sprayed out of a coaxial spinning head, and polyurethane-based fibers are obtained.

[0012] Preferably, the preparation method of the bacterial cellulose-based antibacterial fiber comprises the following steps:

[0013] 1-ethyl-(3-dimethylaminopropyl) carbodiimide salt and N-hydroxysuccinimide are added to the tricarboxylic acid oxidized bacterial cellulose solution, mixed to obtain an emulsion;

[0014] Carbon quantum dots are added to the emulsion, high-speed centrifugal treatment is performed, the upper liquid is removed and an equal amount of deionized water is added, and stirring is performed until uniform to obtain a spinning solution;

[0015] The spinning solution is placed in an injection needle, and spinning is performed using a spinning machine to obtain a bacterial cellulose-based antibacterial fiber.

[0016] Preferably, the preparation method of the O-quaternary ammonium salt chitosan comprises the following steps:

[0017] Chitosan is dissolved in an acetic acid solution, anhydrous ethanol is added, stirring is performed, an ethanol solution containing vanillin is added dropwise, a sodium hydroxide solution is used to adjust the pH to 7, suction filtration, ultrasonic washing, and vacuum drying treatment are performed to obtain chitosan Schiff base;

[0018] The chitosan Schiff base is placed in a reaction container, 2,3-epoxypropyltrimethylammonium chloride is added, stirring is performed, anhydrous ethanol is added, ultrasonic washing, extraction, and vacuum drying treatment are performed to obtain O-quaternary ammonium salt Schiff base chitosan;

[0019] The O-quaternary ammonium salt Schiff base chitosan is poured into a mixed solution of hydrogen chloride and ethanol, heating and distillation treatment are performed, the gel obtained after distillation is dissolved in ionized water, acetone is added, suction filtration and vacuum drying treatment are performed to obtain O-quaternary ammonium salt chitosan.

[0020] Preferably, the preparation method of the PPC-based polyurethane particles comprises the following steps:

[0021] The polypropylene carbonate is poured into a reaction container, isocyanate is added, oil bath heating is performed, a chain extender is added, the solution after reaction is poured into a mold, and an oven is used for curing for 8h to obtain a PPC-based polyurethane sample;

[0022] The PPC-based polyurethane is put into a double-screw extrusion granulator, extrusion granulation is performed, and PPC-based polyurethane particles are obtained.

[0023] Preferably, the mass ratio of the gelatin, ethyl cellulose and PPC-based polyurethane is 1.5:1:1.5.

[0024] Preferably, the preparation method of the carbon quantum dots comprises the following steps:

[0025] Citric acid and 1,5-diaminonaphthalene are added in anhydrous ethanol, and ultrasonic dispersion treatment is performed to obtain a mixture;

[0026] The mixture is transferred into a reaction kettle, sealed and placed in a blast oven at 200 DEG C for hydrothermal reaction for 10 hours.

[0027] Cooling is performed in a fume hood, rotary evaporation treatment is performed, deionized water is added, and filtration, dialysis and freeze-drying treatment are performed to obtain the carbon quantum dots.

[0028] Preferably, the chain extender is one of 1,4-butanediol, 1,2-propanediol, 1,4-cyclohexanediol and ethylene glycol.

[0029] Preferably, the preparation method of the tricarboxylated oxidized bacterial cellulose solution comprises the following steps:

[0030] 2,2,6,6-tetramethylpiperidine-1-oxyl radical, sodium periodate and sodium bromide are added in deionized water, bacterial cellulose is added after ultrasonic dispersion to obtain a mixed solution;

[0031] Sodium hypochlorite is added in the mixed solution, sodium hydroxide solution is used to adjust the pH to 10.5, ethanol is added, and washing and centrifugal treatment are performed to obtain the tricarboxylated oxidized bacterial cellulose solution.

[0032] Preferably, the preparation method of the fiber fabric comprises the following steps:

[0033] S1, polylactic acid fiber yarn is passed from the center of the horn-shaped rotating cylinder, and bacterial cellulose-based antibacterial fiber filaments extruded by the spinning machine needle are uniformly wound on the polylactic acid fiber yarn in the center under the guidance of the horn-shaped rotating cylinder;

[0034] S2, the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after core-sheath winding are arranged on the warp beam and the weft beam of the loom respectively, and interlacing is performed to obtain the fiber fabric.

[0035] Preferably, the preparation method of the fiber fabric further comprises the following steps:

[0036] S11, the polylactic acid fiber yarn wound with the bacterial cellulose-based antibacterial fiber passes through an acetone coagulation bath and is collected by a collection device.

[0037] Compared with the prior art, the present application has the following beneficial effects:

[0038] 1. The present application realizes the production of antibacterial, durable and moisture-absorbing fabrics by preparing a shell spinning solution of gelatin, ethyl cellulose and O-quaternary ammonium salt chitosan, preparing a shell spinning solution of PPC-based polyurethane, and preparing a core-shell structure polyurethane-based fiber by biaxial spinning, solves the problem of discomfort of the fabric in a humid environment, and improves the durability and antibacterial performance of the fabric;

[0039] 2. The present application realizes the stable loading of carbon quantum dots on the fiber by tricarboxylic acid oxidation of bacterial cellulose, solves the problem of easy falling off of antibacterial substances, improves the antibacterial time efficiency and moisture absorption capacity of the fabric, and realizes the dual effects of efficient antibacterial and improved fabric comfort;

[0040] 3. The present application realizes the synergistic effect of antibacterial active quaternary ammonium groups and amino groups by introducing O-quaternary ammonium salt chitosan into the polyurethane-based fiber, improves the antibacterial performance of the polyurethane-based fiber, and enhances the antibacterial performance of the fiber fabric;

[0041] 4. The present application improves the stability and durability of the fiber under the action of mechanical stress such as stretching and bending by chain extension modification of PPC-based polyurethane, enhances the overall performance of the fabric and improves the spinnability, and solves the problem of deformation or damage of the fiber fabric caused by long-term use or external force impact. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The present application is a fiber fabric preparation process schematic diagram;

[0043] Figure 2 The present application is a polyurethane-based fiber preparation process schematic diagram;

[0044] Figure 3 The present application is a bacterial cellulose-based antibacterial fiber preparation process schematic diagram;

[0045] Figure 4 The present application is a preparation process schematic diagram of O-quaternary ammonium salt chitosan;

[0046] Figure 5 The present application is a PPC-based polyurethane particle preparation process schematic diagram;

[0047] Figure 6 The present application is a carbon quantum dot process schematic diagram;

[0048] Figure 7 The present application is a tricarboxylic acid oxidation bacterial cellulose solution preparation process schematic diagram;

[0049] Figure 8 The present application is a chain extender schematic diagram. DETAILED DESCRIPTION

[0050] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0051] Embodiment 1, please refer to Figure 1 , Figure 2 and Figure 3 , an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprises the following steps:

[0052] (1) adding gelatin and ethyl cellulose into hexafluoroisopropanol, heating to 35℃, stirring, preparing a pre-solution with a mass fraction of 10%, adding 3wt% of O-quaternary ammonium salt chitosan into the pre-solution, preparing a shell spinning solution, dissolving PPC-based polyurethane particles in hexafluoroisopropanol, heating and stirring until completely dissolved, preparing a core spinning solution with a mass fraction of 8%, injecting the shell spinning solution and the core spinning solution into the syringes of the coaxial spinning equipment respectively, and spraying out from the coaxial spinning head to obtain polyurethane-based fibers;

[0053] (2) adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide into the tricarboxylic acid oxidized bacterial cellulose solution to obtain an emulsion, adding carbon quantum dots into the emulsion, performing high-speed centrifugal treatment, removing the upper liquid and adding an equal amount of deionized water to obtain a spinning solution, placing the spinning solution in a syringe needle, and performing spinning to obtain bacterial cellulose-based antibacterial fibers;

[0054] (3) the bacterial cellulose-based antibacterial fiber filaments extruded from the spinning machine needle are guided by the horn-shaped drum and uniformly wound on the central polylactic acid fiber yarn, the wound core-sheathed bacterial cellulose-based antibacterial fibers and polyurethane-based fibers are arranged on the warp beam and the weft beam of the weaving machine respectively, and interweaving is performed to obtain a fiber fabric.

[0055] Further, by biaxial spinning of the core layer spinning solution and the shell layer spinning solution, a polyurethane-based fiber with a core-shell structure is prepared, the polyurethane-based fiber serves as one of the fibers of the woven fiber fabric, the main components of the shell layer of the polyurethane-based fiber are gelatin and ethyl cellulose, the gelatin is a macromolecular hydrophilic colloid with good moisture absorption performance, the addition of gelatin can significantly improve the moisture absorption capacity of the fabric, so that the fiber fabric can maintain good comfort in a humid environment; the addition of ethyl cellulose further improves the water resistance and mechanical properties of the fiber fabric, while not affecting the moisture absorption performance of the fiber fabric, so that the fabric has good durability while maintaining high moisture absorption, and the stability of the fiber fabric in a humid environment is enhanced, the shell layer directly contacts the environment, the addition of ethyl cellulose and gelatin to the shell layer can improve the moisture absorption performance of the fiber, at the same time, the interpenetrating network structure formed by ethyl cellulose and gelatin improves the mechanical properties of the fiber to a certain extent, the combination of ethyl cellulose and gelatin enables the shell layer to effectively absorb moisture and maintain good stability and strength.

[0056] O-quaternary ammonium salt chitosan is part of the shell layer spinning solution, chitosan itself has certain antibacterial activity, and quaternization modification further improves the antibacterial effect, so that O-quaternary ammonium salt chitosan enhances the antibacterial performance of the fiber fabric, at the same time, gelatin has certain antibacterial activity, through the complementation of O-quaternary ammonium salt chitosan and gelatin, bacteria are resisted together; polyurethane PPC-based polyurethane is used in the core layer of the polyurethane-based fiber, which provides sufficient mechanical support for the fiber to ensure that the fiber fabric is not easy to break or deform during use; through the mutual assistance of the antibacterial and moisture-absorbing shell layer and the core layer providing mechanical support, the fiber not only maintains good moisture absorption and antibacterial functionality, but also has sufficient strength and elasticity.

[0057] Example 2, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 7 , an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprises the following steps:

[0058] (1) gelatin and ethyl cellulose are added to hexafluoroisopropanol to prepare a pre-solution with a mass fraction of 9%, 2.5wt% O-quaternary ammonium salt chitosan is added to the pre-solution to prepare a shell layer spinning solution, PPC-based polyurethane particles are dissolved in hexafluoroisopropanol to prepare a core layer spinning solution with a mass fraction of 7%, and coaxial spinning is performed to obtain a polyurethane-based fiber;

[0059] (2) adding 2,2,6,6-tetramethylpiperidine-1-oxyl radical, sodium periodate, sodium bromide into deionized water, after ultrasonic dispersion, adding bacterial cellulose to obtain a mixed solution, adding sodium hypochlorite into the mixed solution, using sodium hydroxide solution to adjust pH to 10.5, adding ethanol, carrying out washing and centrifugal treatment to obtain a tricarboxylic oxidized bacterial cellulose solution, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide into the tricarboxylic oxidized bacterial cellulose solution to obtain an emulsion, adding carbon quantum dots into the emulsion, carrying out high-speed centrifugal treatment, removing the upper liquid and adding an equal amount of deionized water to obtain a spinning solution, carrying out spinning to obtain bacterial cellulose-based antibacterial fiber;

[0060] (3) the bacterial cellulose-based antibacterial fiber filament formed by the needle head extrusion of the spinning machine is guided by the horn-shaped rotating drum and uniformly wound on the central polylactic acid fiber yarn, and the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber are interwoven and wound to form a fiber fabric.

[0061] Further, the tricarboxylic oxidation of bacterial cellulose introduces a large number of carboxyl groups on the molecular chain of the bacterial cellulose, the carboxyl groups can act as cross-linking anchors, the amino groups on the carbon quantum dots and the carboxyl groups on the tricarboxylic oxidized bacterial cellulose form amide bonds, the functional molecule carbon quantum dots are efficiently coupled, a stable composite structure is formed, the stability of the carbon quantum dots on the fiber is improved, the carbon quantum dots are not easy to fall off during washing and use; and the carboxyl groups and aldehyde groups on the tricarboxylic oxidized bacterial cellulose have certain electrophilicity and oxidizability, thereby increasing the charge density and reactivity of the surface of the bacterial cellulose-based antibacterial fiber, allowing electrostatic interaction with the bacterial cell wall, destroying the integrity of the bacterial cell wall and inhibiting the growth and reproduction of bacteria; at the same time, after the tricarboxylic oxidized bacterial cellulose is compounded with the carbon quantum dots, the carbon quantum dots can produce active oxygen through photocatalysis to further kill bacteria, the active oxygen substance has strong oxidizing property, can destroy the bacterial cell wall and cell membrane, and cause the death of bacteria, and the amino groups on the carbon quantum dots form amide bonds with the carboxyl groups on the fiber, so that the fiber stably loads the carbon quantum dots, thereby prolonging the antibacterial time effect; in addition, the hydrophilicity of the carboxyl groups on the tricarboxylic oxidized bacterial cellulose significantly improves the moisture absorption capacity of the fiber, forms a hydration film, and enhances the air permeability and comfort of the fiber fabric.

[0062] Example 3, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a kind of antibacterial moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprises the following steps:

[0063] (1) The vanillin is added into the ethanol solution, and the pH value is adjusted to 7 by using the sodium hydroxide solution, and then the filtration, ultrasonic washing and vacuum drying are carried out to obtain the chitosan Schiff base, and then the chitosan Schiff base is placed in the reaction container, and the 2,3-epoxypropyl trimethyl ammonium chloride and the anhydrous ethanol are added, and then the ultrasonic washing, extraction and vacuum drying are carried out to obtain the O-quaternary ammonium salt Schiff base chitosan, and then the O-quaternary ammonium salt Schiff base chitosan is poured into the mixed solution of hydrogen chloride and ethanol, and then the heating and distillation are carried out, and then the gelatinous substance obtained after the distillation is dissolved in the ionized water, and then the acetone is added, and then the filtration and vacuum drying are carried out to obtain the O-quaternary ammonium salt chitosan;

[0064] (2) The gelatin and the ethyl cellulose are added into the hexafluoroisopropanol to prepare a front solution with a mass fraction of 7%, and then the O-quaternary ammonium salt chitosan with a mass fraction of 1.5% is added into the front solution to prepare a shell spinning solution, and then the PPC-based polyurethane particles are dissolved in the hexafluoroisopropanol to prepare a core spinning solution with a mass fraction of 5%, and then the coaxial spinning is carried out to obtain the polyurethane-based fiber.

[0065] (3) The bacterial cellulose-based antibacterial fiber filament extruded by the spinning machine needle is uniformly wound on the polylactic acid fiber yarn in the center under the guidance of the horn-shaped drum, and then the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after the interweaving and winding are obtained to obtain the fiber fabric.

[0066] Further, the O-quaternary ammonium salt chitosan retains the original amino group of the chitosan in the modification process, and the antibacterial active group quaternary ammonium group is introduced into the molecule, and the quaternary ammonium group in the O-quaternary ammonium salt chitosan molecule can interact with the bacterial cell membrane by electrostatic interaction, thereby destroying the integrity of the bacterial cell membrane and inhibiting the growth of bacteria. In addition, the amino group retained by the O-quaternary ammonium salt chitosan interacts with the bacterial cell membrane, thereby further enhancing the antibacterial effect. The synergistic effect of the two antibacterial active groups, i.e., the amino group and the quaternary ammonium group, makes the O-quaternary ammonium salt chitosan have stronger antibacterial performance, thereby improving the antibacterial performance of the polyurethane-based fiber. The O-quaternary ammonium salt chitosan on the surface of the polyurethane-based fiber can adsorb bacteria on the fiber surface by electrostatic attraction. The cell membrane of the bacteria adsorbed on the fiber surface is damaged under the action of the quaternary ammonium group of the O-quaternary ammonium salt chitosan, thereby increasing the permeability of the bacterial cell membrane, causing the bacterial content to leak, and part of the O-quaternary ammonium salt chitosan molecules penetrating the bacterial cell wall, further destroying the bacterial structure, interfering with the normal metabolism and reproduction process of the bacteria, and inhibiting the growth of the bacteria, thereby significantly improving the antibacterial performance of the fiber fabric.

[0067] Example 4, please refer to Figure 1 , Figure 5 and Figure 8 , an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprises the following steps:

[0068] (1) Pour the polypropylene carbonate into the reaction vessel, add isocyanate, carry out oil bath heating, add chain extender, pour the solution after reaction into the mold, use the oven to solidify for 8h, obtain the PPC-based polyurethane sample, put the PPC-based polyurethane into the double screw extruder, carry out extrusion granulation, obtain the PPC-based polyurethane granules;

[0069] (2) Add gelatin and ethyl cellulose in hexafluoroisopropanol to prepare a front solution with a mass fraction of 6%, add 1wt% O-quaternary ammonium salt chitosan in the front solution to prepare a shell spinning solution, dissolve the PPC-based polyurethane granules in hexafluoroisopropanol to prepare a core layer spinning solution with a mass fraction of 4%, and carry out coaxial spinning to obtain a polyurethane-based fiber;

[0070] (3) The bacterial cellulose-based antibacterial fiber filaments extruded by the spinning machine needle are uniformly wound on the central polylactic acid fiber yarn under the guidance of the horn-shaped drum, and the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after core-spun interweaving and winding are obtained to obtain a fiber fabric.

[0071] Further, the PPC-based polyurethane as the main component of the polyurethane-based fiber core layer significantly improves the mechanical strength and toughness of the polyurethane-based fiber. The PPC-based polyurethane synthesized by chain extension modification has a high molecular weight, which improves the stability and durability of the fiber under the action of mechanical stress such as stretching and bending. The chain extension modification introduces isocyanate and chain extender, increases the length and crosslinking degree of the polypropylene carbonate molecular chain, so that the fiber can effectively disperse and withstand external force, prevent the fiber from breaking under stress, and thus improve the overall mechanical properties of the fiber fabric. The chain-extended PPC-based polyurethane has a more suitable melt flow rate and viscosity, so that the core layer spinning solution can maintain a stable flow state during the spinning process, which is beneficial to the continuous stretching and refinement of the fiber, and the fiber has better formability and spinnability during processing.

[0072] Example 5, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 , an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprises the following steps:

[0073] (1) Add gelatin and ethyl cellulose in hexafluoroisopropanol to prepare a front solution with a mass fraction of 5%, add 0.5wt% O-quaternary ammonium salt chitosan in the front solution to prepare a shell spinning solution, dissolve the PPC-based polyurethane granules in hexafluoroisopropanol to prepare a core layer spinning solution with a mass fraction of 3%, and carry out coaxial spinning to obtain a polyurethane-based fiber;

[0074] (2) Citric acid, 1,5-diaminonaphthalene are added in anhydrous ethanol, ultrasonic dispersion treatment is carried out, a mixture is obtained, the mixture is transferred into a reaction kettle, after being sealed, it is placed in a 200℃ blast oven, hydrothermal reaction is carried out for 10h, cooling is carried out in a fume hood, rotary evaporation treatment is carried out, deionized water is added, suction filtration, dialysis, freeze-drying treatment are carried out, carbon quantum dots are obtained; 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt, N-hydroxysuccinimide are added in a solution of carboxylated bacterial cellulose, carbon quantum dots are added, a spinning solution is prepared, spinning is carried out, bacterial cellulose-based antibacterial fiber is obtained;

[0075] (3) The bacterial cellulose-based antibacterial fiber filament extruded by the needle head of the spinning machine is uniformly wound onto the polylactic acid fiber yarn in the center under the guidance of the horn-shaped drum, and the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after interweaving and winding are core-spun, to obtain the fiber fabric.

[0076] Further, the water retention rate of bacterial cellulose itself reaches 600%-1000%, the carboxyl introduced by carboxylation forms strong hydrogen bonds with water molecules, so that the water absorption rate of the bacterial cellulose-based antibacterial fiber is increased by more than 1.5 times that of the bacterial cellulose substrate, further improving the moisture absorption of the fiber fabric; the nanometer network structure of the bacterial cellulose-based antibacterial fiber forms a capillary effect, accelerates water adsorption and diffusion, quickly absorbs sweat and evaporates, keeps the fabric dry, avoids the breeding of bacteria in a humid environment, reduces the skin surface moisture through moisture absorption, destroys the bacterial breeding environment, carboxylation provides more coupling sites, ensures high loading rate of carbon quantum dots, and the antibacterial effect of carbon quantum dots and O-quaternary ammonium salt chitosan can eliminate residual microorganisms and inhibit bacteria from decomposing fatty acids and proteins in sweat, thereby reducing odor generation from the source and bidirectionally inhibiting odor.

[0077] Example 6, please refer to Figure 1 , Figure 2 and Figure 3 , an antibacterial and moisture-absorbing fiber fabric, a preparation method of the fiber fabric comprises the following steps:

[0078] (1) Gelatin, ethyl cellulose are added in hexafluoroisopropanol to prepare a pre-solution with a mass fraction of 5%, O-quaternary ammonium salt chitosan is added in the pre-solution to prepare a shell spinning solution with a mass fraction of 0.1wt%, PPC-based polyurethane particles are dissolved in hexafluoroisopropanol to prepare a core spinning solution with a mass fraction of 2%, coaxial spinning is carried out, to obtain a polyurethane-based fiber;

[0079] (2) The bacterial cellulose-based antibacterial fiber filament extruded by the needle head of the spinning machine is uniformly wound onto the polylactic acid fiber yarn in the center under the guidance of the horn-shaped drum, and the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after interweaving and winding are core-spun, to obtain the fiber fabric.

[0080] Further, the gelatin and ethyl cellulose have hydrophilicity, can absorb moisture in the air, and due to the large number of gaps between the fibers, the moisture can penetrate the fiber surface into the interior, forming moisture permeability; in the process of preparing the fiber fabric, the bacterial cellulose-based antibacterial fiber filaments are uniformly wound on the central polylactic acid fiber yarn to form a core-sheath structure, which not only retains the antibacterial property of the bacterial cellulose-based antibacterial fiber, but also enhances the strength and stability of the fiber through the support of the polylactic acid fiber yarn. The interwoven and wound bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber make the fiber fabric have both antibacterial property and good mechanical property.

[0081] Comparative Example 1, an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprising the following steps:

[0082] (1) adding gelatin and ethyl cellulose in hexafluoroisopropanol to prepare a shell spinning solution with a mass fraction of 10%, dissolving PPC-based polyurethane particles in hexafluoroisopropanol to prepare a core spinning solution with a mass fraction of 8%, and performing coaxial spinning to obtain polyurethane-based fibers;

[0083] (2) adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide in tricarboxylic acid oxidized bacterial cellulose solution, adding carbon quantum dots, performing high-speed centrifugal treatment, removing the upper liquid and adding an equal amount of deionized water, performing spinning to obtain bacterial cellulose-based antibacterial fibers;

[0084] (3) the bacterial cellulose-based antibacterial fiber filaments extruded from the spinning machine needle are guided by the horn-shaped drum to be uniformly wound on the central polylactic acid fiber yarn, the wound bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber are arranged on the warp beam and the weft beam of the loom respectively, and interweaving is performed to obtain a fiber fabric.

[0085] Comparative Example 2, an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprising the following steps:

[0086] (1) adding gelatin and ethyl cellulose in hexafluoroisopropanol to prepare a front solution with a mass fraction of 10%, adding 3wt% of O-quaternary ammonium salt chitosan in the front solution to prepare a shell spinning solution, dissolving PPC-based polyurethane particles in hexafluoroisopropanol to prepare a core spinning solution with a mass fraction of 8%, and performing coaxial spinning to obtain polyurethane-based fibers;

[0087] (2) adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide in tricarboxylic acid oxidized bacterial cellulose solution, performing high-speed centrifugal treatment, removing the upper liquid and adding an equal amount of deionized water to obtain a spinning solution, and performing spinning to obtain bacterial cellulose-based antibacterial fibers

[0088] (3) The bacterial cellulose-based antibacterial fiber filament formed by the spinning machine needle head extrusion is uniformly wound on the central polylactic acid fiber yarn under the guidance of the horn-shaped rotating drum. The wound core-spun bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber are arranged on the warp beam and the weft beam of the loom respectively, and are interwoven to obtain a fiber fabric.

[0089] Comparative Example 3, an antibacterial and moisture-absorbing fiber fabric, the preparation method of the fiber fabric comprising the following steps:

[0090] (1) Gelatin and ethyl cellulose are added to hexafluoroisopropanol to prepare a pre-solution with a mass fraction of 10%. 3wt% O-quaternary ammonium salt chitosan is added to the pre-solution to prepare a shell spinning solution. PPC-based polyurethane particles are dissolved in hexafluoroisopropanol to prepare a core spinning solution with a mass fraction of 8%. Coaxial spinning is performed to obtain a polyurethane-based fiber;

[0091] (2) 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide are added to a tricarboxylic acid oxidized bacterial cellulose solution, and carbon quantum dots are added. High-speed centrifugal treatment is performed, the upper liquid is removed, and an equal amount of deionized water is added. Spinning is performed to obtain a bacterial cellulose-based antibacterial fiber;

[0092] (3) The bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber are arranged on the warp beam and the weft beam of the loom respectively, and are interwoven to obtain a fiber fabric.

[0093] Performance test

[0094] Test 1: Tensile property test: The samples prepared in Examples 1-6 and Comparative Examples 1-3 are tested using a universal material testing machine. The sample is placed between the clamps, and the tensile strength is recorded;

[0095] Test 2: Antibacterial property test: The samples prepared in Examples 1-6 and Comparative Examples 1-3 are tested according to the national standard GB / T20944.1-2007, and the antibacterial rate of the sample is calculated;

[0096] Test 3: Air permeability test: The samples prepared in Examples 1-6 and Comparative Examples 1-3 are placed on the test head according to the GB / T 24218.15-2018 standard, and the sample is fixed by the clamping system. The air permeability is calculated;

[0097] Test 4: Moisture absorption performance test: The samples prepared in Examples 1-6 and Comparative Examples 1-3 are placed in a constant temperature and humidity chamber, and the moisture absorption rate of the sample is calculated.

[0098] Test 5 moisture permeability test: the prepared samples of examples 1-6, comparative examples 1-3, according to YY / T 0471.2-2004 standard, the sample is placed in a sample bottle containing deionized water, the sample bottle is placed in an incubator, and the moisture permeability is calculated.

[0099] Table 1 test results of sample performance test

[0100] Example Tensile strength (MPa) Bacteriostatic rate (%) Air permeability (mm / s) Moisture absorption rate (%) moisture permeability (g·m -2 ·d -1 )]]> Example 1 358.5 88.6 273.5 18.7 15834.6 Example 2 346.7 84.3 271.2 18.2 15763.4 Example 3 335.2 81.2 269.8 17.6 15642.5 Example 4 326.1 77.6 267.6 17.1 15538.7 Example 5 318.4 73.5 266.8 16.8 15446.9 Example 6 310.5 69.8 266.1 16.5 15337.8 Comparative Example 1 355.7 65.8 271.7 18.4 15625.6 Comparative Example 2 354.4 64.3 270.2 18.3 15616.9 Comparative Example 3 289.2 85.6 272.8 18.3 15865.4

[0101] According to examples 1-6, comparative examples 1-3 and table 1, the introduction of O-quaternary ammonium salt chitosan and carbon quantum dots enhances the antibacterial performance of the fiber fabric; the bacterial cellulose-based antibacterial fiber is wound around the polylactic acid fiber yarn, which enhances the mechanical properties of the fiber fabric; the bacterial cellulose-based antibacterial fiber is interwoven with the polyurethane-based fiber to form a fiber fabric, which has good air permeability, moisture permeability and moisture absorption.

[0102] Working principle: the polyurethane-based fiber with core-shell structure prepared by double shaft spinning, in which the gelatin component significantly improves the moisture absorption capacity of the fabric, and the ethyl cellulose effectively improves the water resistance and mechanical properties of the fabric, the synergistic effect of the two makes the polyurethane-based fiber have both moisture absorption and stability, and the addition of O-quaternary ammonium salt chitosan enhances the antibacterial performance of the polyurethane-based fiber;

[0103] The core layer of the polyurethane-based fiber uses PPC-based polyurethane material to improve the mechanical properties of the polyurethane-based fiber, effectively preventing the fabric from breaking or deforming, and the antibacterial and moisture absorption shell layer of the polyurethane-based fiber and the mechanical support core layer mutually assist each other, so that the polyurethane-based fiber has both moisture absorption and antibacterial functions and excellent strength.

[0104] After the bacterial cellulose is treated by tricarboxylic acid oxidation, the carboxyl group can form a stable amide bond with the amino group of the carbon quantum dots, significantly improving the adhesion stability of the carbon quantum dots and reducing the shedding phenomenon, and after the tricarboxylic acid oxidation bacterial cellulose is compounded with carbon quantum dots, the fiber produces reactive oxygen through photocatalysis, realizing long-acting sterilization.

[0105] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. An antibacterial moisture-absorbing fiber fabric, characterized by: The application relates antibacterial fibers based on bacterial cellulose and polyurethane, and a preparation method of the antibacterial fibers based on bacterial cellulose and polyurethane. The antibacterial fibers based on bacterial cellulose and polyurethane are prepared by the following steps: Gelatin and ethyl cellulose are added into hexafluoroisopropanol, and heated to 35 DEG C and stirred to prepare a pre-solution with a mass fraction of 5-10%; 0.1-3 wt% of O-quaternary ammonium salt chitosan is added into the pre-solution to prepare a shell spinning solution; PPC-based polyurethane particles are dissolved in hexafluoroisopropanol, heated and stirred until completely dissolved to prepare a core spinning solution with a mass fraction of 2-8%; 2. The antibacterial moisture-wicking fibrous facing material of claim 1, wherein: The shell spinning solution and the core spinning solution are respectively injected into injectors of a coaxial spinning device, and sprayed from a coaxial spinning head to obtain polyurethane fibers. The preparation method of the antibacterial fibers based on bacterial cellulose comprises the following steps: 1-ethyl-(3-dimethylaminopropyl) carbodiimide acid salt and N-hydroxysuccinimide are added into a solution of tricarboxylic acid oxidized bacterial cellulose and mixed to obtain an emulsion; Carbon quantum dots are added into the emulsion, high-speed centrifugal treatment is conducted, the upper liquid is removed, and an equal amount of deionized water is added, and stirred uniformly to obtain a spinning solution; 3. The antibacterial moisture-wicking fibrous facing material of claim 1, wherein: The spinning solution is placed in an injection needle, and spinning is conducted by using a spinning machine to obtain the antibacterial fibers based on bacterial cellulose. The preparation method of the O-quaternary ammonium salt chitosan comprises the following steps: Chitosan is dissolved in an acetic acid solution, anhydrous ethanol is added, and stirring is conducted, an ethanol solution containing vanillin is added dropwise, sodium hydroxide solution is used to adjust the pH to 7, and suction filtration, ultrasonic washing and vacuum drying treatment are conducted to obtain chitosan Schiff base; The chitosan Schiff base is placed in a reaction container, 2,3-epoxypropyltrimethylammonium chloride is added, stirring is conducted, anhydrous ethanol is added, and ultrasonic washing, extraction and vacuum drying treatment are conducted to obtain O-quaternary ammonium salt Schiff base chitosan; 4. The antibacterial moisture-wicking fibrous facing material of claim 1, wherein: The O-quaternary ammonium salt Schiff base chitosan is poured into a mixed solution of hydrogen chloride and ethanol, heating and distillation treatment are conducted, the colloidal substance obtained after distillation is dissolved in ionized water, and acetone is added, and suction filtration and vacuum drying treatment are conducted to obtain O-quaternary ammonium salt chitosan. The preparation method of the PPC-based polyurethane particles comprises the following steps: Polypropylene carbonate is poured into a reaction container, isocyanate is added, oil bath heating is conducted, a chain extender is added, the solution after reaction is poured into a mold, and an oven is used for curing for 8 h to obtain a PPC-based polyurethane sample; 5. The antibacterial moisture-wicking fibrous facing material of claim 1, wherein: The PPC-based polyurethane is put into a double-screw extrusion granulator to conduct extrusion granulation, and PPC-based polyurethane particles are obtained.

6. An antimicrobial moisture-wicking fibrous facing fabric according to claim 2, wherein: The mass ratio of the gelatin, ethyl cellulose and PPC-based polyurethane is 1.5:1:1.

5. The preparation method of the carbon quantum dots comprises the following steps: Citric acid and 1,5-diaminonaphthalene are added into anhydrous ethanol, and ultrasonic dispersion treatment is conducted to obtain a mixture; The mixture is transferred into a reaction kettle, sealed, and placed in a 200 DEG C blast oven for hydrothermal reaction for 10 h; Cooling is conducted in a fume hood, rotary evaporation treatment is conducted, deionized water is added, and suction filtration, dialysis and freeze drying treatment are conducted to obtain carbon quantum dots.

7. An antimicrobial moisture-wicking fibrous facing material according to claim 4, wherein: The chain extender is selected from one of 1,4-butanediol, 1,2-propanediol, 1,4-cyclohexanediol, and ethylene glycol.

8. The antibacterial moisture-wicking fibrous facing material of claim 2, wherein: The preparation method of the tricarboxylic oxidized bacterial cellulose solution comprises the following steps: 2,2,6,6-tetramethylpiperidine-1-oxyl radical, sodium periodate, and sodium bromide are added in deionized water, and then bacterial cellulose is added after ultrasonic dispersion to obtain a mixed solution; Sodium hypochlorite is added in the mixed solution, sodium hydroxide solution is used to adjust the pH to 10.5, and then ethanol is added, and washing and centrifugal treatment are performed to obtain the tricarboxylic oxidized bacterial cellulose solution.

9. A process for the preparation of an antibacterial, moisture-absorbing fiber fabric suitable for use in an antibacterial, moisture-absorbing fiber fabric according to any one of claims 1 to 8, characterized in that: The preparation method of the fiber fabric comprises the following steps: S1, the polylactic acid fiber yarn is passed from the center of the horn-shaped rotating drum, and the bacterial cellulose-based antibacterial fiber filaments formed by the needle head extrusion are uniformly wound on the polylactic acid fiber yarn in the center under the guidance of the horn-shaped rotating drum; S2, the bacterial cellulose-based antibacterial fiber and the polyurethane-based fiber after core-sheath winding are arranged on the warp beam and the weft beam of the loom respectively, and interlacing is performed to obtain the fiber fabric.

10. A process for the preparation of an antibacterial absorbent fibrous web as claimed in claim 9, characterized in that: The preparation method of the fiber fabric further comprises the following steps: S11, the polylactic acid fiber yarn wound with the bacterial cellulose-based antibacterial fiber is passed through an acetone coagulation bath and collected by a collection device.

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