Antibacterial and deodorant blended fabric, preparation method thereof and application of antibacterial and deodorant blended fabric in underwear

Abstract

The invention discloses an antibacterial and deodorant blended fabric, a preparation method thereof and application of the antibacterial and deodorant blended fabric in underwear, and relates to the technical field of fabrics. When the antibacterial and deodorant blended fabric is prepared, firstly, indolyl polyester is subjected to melt spinning to be prepared into fibers; the preparation method comprises the following steps: reacting fibers, indole and indole-6-formaldehyde, reacting with 4-(aminomethyl)-2, 6-di-tert-butylphenol, and reducing to obtain modified polyester fibers; secondly, the pretreated bamboo fibers react with carbon disulfide and potassium hydroxide; the preparation method comprises the following steps: oxidizing a modified bamboo fiber precursor obtained by reacting the modified bamboo fiber with 1-(2-propenyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone to obtain a modified bamboo fiber, and oxidizing the modified bamboo fiber precursor to obtain the modified bamboo fiber; the modified polyester fibers and the modified bamboo fibers are blended and woven to obtain fabric, and then the fabric is finished through a finishing agent to obtain the antibacterial and deodorant blended fabric. The antibacterial and deodorant blended fabric prepared by the invention has good antistatic, antibacterial and durable properties.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, in particular to an antibacterial and deodorizing blended fabric, a preparation method thereof, and application in underwear. Background Art

[0002] Underwear, as clothing worn next to the skin, requires a fabric that is crucial for both comfort and well-being. Traditionally, polyester fiber has been widely used in underwear fabrics due to its excellent abrasion resistance, high strength, wrinkle resistance, and ease of care. However, polyester fiber also has some significant drawbacks, such as poor breathability and low moisture absorption. These characteristics can make the wearer feel stuffy and airtight during exercise or in high-temperature environments, which is detrimental to skin health. Furthermore, due to the hydrophobic nature of polyester fiber, sweat is difficult to expel, and prolonged wear can lead to bacterial growth and odor problems.

[0003] Improving the hydrophilicity of fabrics is one of the keys to improving the wearing experience. By improving fiber surface treatment technology or adding hydrophilic additives, the moisture absorption and perspiration function of the fabric can be enhanced, thereby effectively alleviating the feeling of stuffiness. Another important aspect is the improvement of anti-static performance. The accumulation of static electricity not only affects the wearer's comfort, but may also cause other inconveniences.

[0004] Bamboo fiber, an emerging natural fiber material, has attracted attention for its excellent skin-friendliness, breathability, and natural antibacterial and deodorizing properties. Blending bamboo fiber with polyester to create new fabrics retains the advantages of polyester while leveraging bamboo fiber's strengths to offset its shortcomings. For example, bamboo fiber contains numerous microporous structures, which impart excellent moisture absorption and breathability. Its rich content of natural antibacterial components (such as bamboo kun) helps inhibit bacterial growth, providing a long-lasting antibacterial effect. Therefore, blending bamboo fiber with polyester to create antibacterial and deodorizing blended fabrics not only ensures durability and easy care, but also significantly enhances wearing comfort and improves hygiene. Summary of the Invention

[0005] The purpose of the present invention is to provide an antibacterial and deodorizing blended fabric and a preparation method thereof, so as to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A method for preparing an antibacterial and deodorizing blended fabric comprises the following steps: (1) 5,6-dihydroxyindole and acetic anhydride are reacted to obtain acylated indole; ethylene glycol, dimethyl terephthalate and acylated indole are polymerized to obtain indole-based polyester; (2) After the indole-based polyester is sheared and granulated, it is spun into indole-based polyester fiber through a melt spinning machine; the indole-based polyester fiber, indole, and indole-6-carboxaldehyde are reacted to obtain pre-modified polyester fiber; (3) reacting pre-modified polyester fiber with 4-(aminomethyl)-2,6-di-tert-butylphenol, and then reducing the pre-modified polyester fiber with sodium borohydride; (4) reacting carboxylated bamboo fiber, 1-hydroxybenzotriazole, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and hydrazine hydrate to obtain pretreated bamboo fiber; reacting carbon disulfide, potassium hydroxide and pretreated bamboo fiber to obtain pre-modified bamboo fiber; (5) Pre-modified bamboo fiber and 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione are reacted to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor is oxidized by an ammonium molybdate-30wt% hydrogen peroxide system to obtain a modified bamboo fiber; (6) Modified polyester fiber and modified bamboo fiber are blended to obtain fabric; the fabric is treated with a finishing agent to obtain an antibacterial and deodorizing blended fabric.

[0007] As an optimization, the preparation method of the indole polyester in step (1) is as follows: 5,6-dihydroxyindole and acetic anhydride are mixed in a molar ratio of 1: (2.03-2.05), pyridine is added in an amount 5-6 times the mass of 5,6-dihydroxyindole, the reaction is carried out at room temperature for 12 hours, pure water at 4°C in an amount 5-6 times the mass of pyridine is added, and the acylated indole is obtained by filtering and drying; ethylene glycol, dimethyl terephthalate, and acylated indole are mixed in a molar ratio of 1: (0.6-0.8): (0.4-0.5), and the mixture is added to the reaction mixture. In the reaction kettle, 0.2% zinc acetate by weight of dimethyl terephthalate was added, and the reaction was carried out at 170-180°C for 3-4h. Antimony trioxide by weight of dimethyl terephthalate was added, and the temperature was raised to 190-200°C, and the temperature was evacuated to -0.1MPa. After reacting for 3-5h, the temperature was lowered to room temperature and restored to atmospheric pressure. The mixture was added to 30-40 times the volume of dimethyl terephthalate in dichloromethane, and then 3-4 times the volume of dichloromethane was added in methanol. The mixture was filtered and dried in vacuo to obtain indole polyester.

[0008] As an optimization, the preparation method of the pre-modified polyester fiber in step (2) is as follows: indole-based polyester is sheared and granulated to obtain pellets, the pellets are spun through a melt spinning machine, and then drawn and heat-treated to prepare indole-based polyester fibers; indole-based polyester fibers, ammonium persulfate, ferric chloride, and p-toluenesulfonic acid are weighed in a mass ratio of 1:0.3:0.5:0.5, and indole-based polyester fibers, chloroform, indole, and indole-6-carboxaldehyde are weighed in a mass ratio of 1:(10-12):(0.1-0.2):(0.1-0. 2) mixing for 5 minutes, removing and rolling to a rolling ratio of 80%, and then immersing in an oxidant mixture, wherein the oxidant mixture is a mixture of ammonium persulfate, ferric chloride, p-toluenesulfonic acid, and chloroform with a mass ratio of 100 times that of ammonium persulfate; stirring at room temperature for 5-6 hours, removing and washing and drying to obtain a pre-modified polyester fiber; the melt spinning machine has a spinning temperature of 210-240° C., a draft ratio of 1.5 times, and a heat treatment temperature of 80° C.; the indole-based polyester fiber has a linear density of 1.6 dtex.

[0009] As an optimization, the preparation method of the modified polyester fiber in step (3) is as follows: pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide are mixed in a mass ratio of 1: (0.2-0.3): (20-30), heated to 80-90°C and reacted for 5-6 hours. After the reaction, the mixture is filtered and washed with N,N-dimethylformamide 3-4 times, and redispersed in N,N-dimethylformamide with a mass of 20-30 times that of the pre-modified polyester fiber, and sodium borohydride with a mass of 0.1 times that of the pre-modified polyester fiber is added. The mixture is reacted at room temperature for 30-40 minutes, and the pH is adjusted to 7 with acetic acid. The modified polyester fiber is obtained by filtration, washing with pure water, and vacuum drying.

[0010] As an optimization, the preparation method of the pre-modified bamboo fiber in step (4) is as follows: carboxylated bamboo fiber, acetonitrile, 1-hydroxybenzotriazole, and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride are mixed in a mass ratio of 1: (0.2-0.3): (0.2-0.3): (30-40), reacted at 20-25 ° C for 1-2 h, cooled to 0-5 ° C after the reaction, added 80wt% hydrazine hydrate solution with a mass of 0.01 times the mass of bamboo fiber, and continued to react for 3-4 h. The reaction result is as follows: After beaming, sodium hydroxide was used to adjust the pH to 8-9, and the pretreated bamboo fiber was obtained by filtration, washing with pure water, and vacuum drying. Carbon disulfide, ethanol, and potassium hydroxide were mixed in a mass ratio of 1: (50-60): (0.6-0.7) for 10 minutes, and 5-6 times the mass of carbon disulfide was added to the pretreated bamboo fiber. The temperature was raised to 40-50°C and the reaction was carried out for 2 hours. The temperature was further raised to 75-80°C and the reaction was refluxed for 1-2 hours. After the reaction was completed, the pre-modified bamboo fiber was obtained by filtration, washing with pure water, and vacuum drying.

[0011] As an optimization, the preparation method of the modified bamboo fiber in step (5) is as follows: pre-modified bamboo fiber, acetonitrile, 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, and benzil dimethyl ether are mixed in a mass ratio of 1:(30-40):(0.2-0.3):0.01; the mixture is irradiated under an ultraviolet lamp with a power of 100 W and a wavelength of 365 nm for 30-40 minutes, and after the reaction is completed, the mixture is taken out and vacuum-dried at room temperature to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor, ammonium molybdate, 30wt% hydrogen peroxide, and ethanol are mixed in a mass ratio of 1:0.001:10:(50-60), and the mixture is reacted at room temperature for 3-4 hours. After the reaction is completed, the mixture is filtered and washed with saturated sodium bicarbonate for 3-4 times, and then washed with pure water and vacuum-dried to obtain the modified bamboo fiber.

[0012] As an optimization, the preparation method of the antibacterial and deodorizing blended fabric in step (6) is as follows: modified polyester fiber and modified bamboo fiber are blended in a mass ratio of 60:40 to obtain a blended yarn; the blended yarn is woven to obtain a fabric; the surface density of the fabric is 80-100 g / m 2 ; The fabric, finishing agent and triethylamine are mixed in a mass ratio of 1:20:0.1, stirred at 50°C for 30-40 minutes, taken out for rolling, with a rolling rate of 60%-70%, pre-baked at 90-100°C for 10 minutes, and baked at 150°C for 1 minute to obtain an antibacterial and deodorizing blended fabric; the finishing agent is dichloropolyethylene glycol with a molecular weight of 2000; purchased from Xi'an Ruixi Biotechnology Co., Ltd.

[0013] As an optimization, the preparation method of the carboxylated bamboo fiber is as follows: bamboo fiber, acid mixture and sodium nitrite are mixed in a mass ratio of 1:30:0.3, stirred at room temperature in the dark for 1 hour, filtered and washed with pure water 3-4 times, and then redispersed in a 1 mg / mL propylene glycol solution 30 times the mass of the bamboo fiber and soaked for 20 minutes. After taking out, it is washed with pure water and dried to obtain carboxylated bamboo fiber; the acid mixture is obtained by mixing nitric acid and phosphoric acid in a volume ratio of 2:1; the fineness of the bamboo fiber is 1.5 dtex.

[0014] The present invention also provides an antibacterial and deodorizing blended fabric prepared according to the method for preparing the antibacterial and deodorizing blended fabric.

[0015] The present invention also provides an application of the antibacterial and deodorizing blended fabric prepared according to the preparation method of the antibacterial and deodorizing blended fabric in underwear.

[0016] Compared with the prior art, the present invention has the following beneficial effects: when preparing antibacterial and deodorizing blended fabrics, the present invention first polymerizes ethylene glycol, dimethyl terephthalate, and acylated indole to obtain indole-based polyester; then melt-spins the fibers to prepare them; then reacts the fibers, indole, and indole-6-carboxaldehyde to obtain pre-modified polyester fibers; then reacts the pre-modified polyester fibers with 4-(aminomethyl)-2,6-di-tert-butylphenol, and then reduces the fibers with sodium borohydride to obtain modified polyester fibers; then, carboxylates the bamboo fibers. , 1-hydroxybenzotriazole, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, and hydrazine hydrate; then react with carbon disulfide and potassium hydroxide; then react with 1-(2-propylene)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor is oxidized to obtain modified bamboo fiber; the modified polyester fiber and the modified bamboo fiber are blended to obtain fabric; the fabric is treated with a finishing agent to obtain an antibacterial and deodorizing blended fabric.

[0017] First, ethylene glycol, dimethyl terephthalate, and acylated indole are polymerized to obtain indole-based polyester; then melt spinning is performed to prepare fibers; the indole, indole, and indole-6-carboxaldehyde on the fiber surface are chemically oxidatively polymerized to generate polyindole with aldehyde groups on the side chains. Acid-doped polyindole is a good conductive material that can provide good antistatic properties for the fabric; the aldehyde group on the polyindole side chain reacts with 4-(aminomethyl)-2,6-di-tert-butylphenol to undergo a Schiff base reaction, thereby introducing a hindered phenol structure with antioxidant properties, providing good antioxidant properties for the fabric, and then sodium borohydride is used to reduce the Schiff base to a secondary amino group; secondly, the bamboo fiber containing carboxyl groups on the surface is reacted with 1-hydroxybenzotriazole, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, and hydrazine hydrate, and the carboxyl groups are converted into amide groups. The potassium ethylxanthate generated by carbon disulfide and potassium hydroxide reacts with the hydrazide groups, and then Cyclization generates a thiol-containing oxadiazole. The thiol and 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione are grafted onto 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione through a thiol-alkenyl click chemistry reaction, converting the thiol into a thioether. Finally, under an oxidation system, the thioether is converted into a sulfone structure. The oxadiazole sulfone has good antibacterial properties and can provide antibacterial properties for fabrics. Secondly, the triazine ring structure in 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione has good chemical and thermal stability, and its tertiary nitrogen structure has a good carbon-forming effect. In addition, the abundant nitrogen element can act as a gas source, effectively inhibiting the release of heat and the production of harmful smoke during combustion, thereby providing certain flame retardant properties.

[0018] Finally, the modified polyester fiber and modified bamboo fiber are blended to produce a fabric. The fabric is then treated with a finishing agent to obtain an antibacterial and deodorizing blended fabric. The finishing agent is polyethylene glycol with chlorine at both ends. The oxygen atoms in the polyethylene glycol can form hydrogen bonds with water molecules, thereby providing moisture absorption properties for the fabric. Due to its good moisture absorption, the polyethylene glycol-treated fabric can more quickly conduct sweat and other moisture from the skin surface to the outer layer and evaporate it, keeping the wearer dry and comfortable. The chlorine at both ends of the polyethylene glycol can react with the secondary amino groups on the polyester fiber and the secondary amino groups on the bamboo fiber, cross-linking the two fibers through the polyethylene glycol. This not only further enhances the mechanical properties of the fabric, but also prevents the polyethylene glycol from falling off during washing. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the following examples and comparative examples, the finishing agent is dichloropolyethylene glycol with a molecular weight of 2000, purchased from Xi'an Ruixi Biotechnology Co., Ltd.; the acid mixture is prepared by mixing nitric acid and phosphoric acid in a volume ratio of 2:1; and the fineness of the bamboo fiber is 1.5 dtex.

[0021] Example 1: A method for preparing an antibacterial and deodorizing blended fabric, comprising the following steps: (1) 5,6-dihydroxyindole and acetic anhydride were mixed in a molar ratio of 1:2.03, pyridine was added in an amount 5 times the mass of 5,6-dihydroxyindole, and the mixture was reacted at room temperature for 12 hours. Pure water at 4°C in an amount 5 times the mass of pyridine was added, and the mixture was filtered and dried to obtain acylated indole; ethylene glycol, dimethyl terephthalate, and acylated indole were mixed in a molar ratio of 1:0.6:0.4, and the mixture was added to a reactor. Zinc acetate in an amount 0.2% by mass of dimethyl terephthalate was added, and the mixture was reacted at 180°C for 4 hours. Antimony trioxide in an amount 0.15% by mass of dimethyl terephthalate was added, the mixture was heated to 200°C, and the mixture was evacuated to -0.1 MPa. After the mixture was reacted for 5 hours, the mixture was cooled to room temperature and restored to atmospheric pressure, and the mixture was added to dichloromethane in an amount 30 times the mass of dimethyl terephthalate. Methanol in an amount 4 times the mass of dichloromethane was added, and the mixture was filtered and dried in a vacuum to obtain indole polyester; (2) Indole polyester is sheared and granulated to obtain pellets, the pellets are spun through a melt spinning machine, and then drawn and heat treated to prepare indole polyester fibers; indole polyester fibers, ammonium persulfate, ferric chloride, and p-toluenesulfonic acid are weighed in a mass ratio of 1:0.3:0.5:0.5, indole polyester fibers, chloroform, indole, and indole-6-carboxaldehyde are mixed in a mass ratio of 1:10:0.1:0.1 for 5 minutes, taken out and rolled, with a rolling rate of 80%, and then immersed in an oxidant mixture, the oxidant mixture solution being a mixture of ammonium persulfate, ferric chloride, p-toluenesulfonic acid, and chloroform with a mass of 100 times that of ammonium persulfate; stirred at room temperature for 6 hours, taken out and washed and dried to obtain pre-modified polyester fibers; the spinning temperature of the melt spinning machine is 240°C, the drawing ratio is 1.5 times, and the heat treatment temperature is 80°C; the linear density of the indole polyester fibers is 1.6 dtex; (3) Pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.2:20, heated to 90°C and reacted for 6 hours. After the reaction, the mixture was filtered and washed with N,N-dimethylformamide 4 times, and redispersed in N,N-dimethylformamide with a mass 30 times that of the pre-modified polyester fiber. Sodium borohydride with a mass 0.1 times that of the pre-modified polyester fiber was added, and the mixture was reacted at room temperature for 40 minutes. Acetic acid was used to adjust the pH to 7, and the modified polyester fiber was obtained by filtration, washing with pure water, and vacuum drying. (4) Bamboo fiber, acid mixture and sodium nitrite were mixed in a mass ratio of 1:30:0.3, stirred at room temperature in the dark for 1 hour, filtered and washed with pure water 4 times, and then redispersed in a 1 mg / mL propylene glycol solution 30 times the mass of bamboo fiber and soaked for 20 minutes. Then, the mixture was taken out and washed with pure water 3 times, and dried at 60 ° C to obtain carboxylated bamboo fiber; carboxylated bamboo fiber, acetonitrile, 1-hydroxybenzotriazole and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride were mixed in a mass ratio of 1:0.2:0.2:30 and reacted at 25 ° C for 2 hours. h, after the reaction is completed, the temperature is lowered to 0°C, and an 80wt% hydrazine hydrate solution of 0.01 times the mass of the bamboo fiber is added, and the reaction is continued for 4 hours. After the reaction is completed, sodium hydroxide is used to adjust the pH to 8, and the pretreated bamboo fiber is obtained by filtering, washing with pure water, and vacuum drying. Carbon disulfide, ethanol, and potassium hydroxide are mixed in a mass ratio of 1:50:0.6 for 10 minutes, and 5 times the mass of the carbon disulfide pretreated bamboo fiber is added. The temperature is raised to 50°C and the reaction is carried out for 2 hours. The temperature is further raised to 80°C and refluxed for 2 hours. After the reaction is completed, the pre-modified bamboo fiber is obtained by filtering, washing with pure water, and vacuum drying. (5) Pre-modified bamboo fiber, acetonitrile, 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, and benzil dimethyl ether were mixed in a mass ratio of 1:30:0.2:0.01; the mixture was irradiated under an ultraviolet lamp with a power of 100 W and a wavelength of 365 nm for 40 min. After the reaction, the mixture was taken out and vacuum-dried at room temperature to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor, ammonium molybdate, 30 wt% hydrogen peroxide, and ethanol were mixed in a mass ratio of 1:0.001:10:50, and reacted at room temperature for 4 h. After the reaction, the mixture was filtered and washed with saturated sodium bicarbonate 4 times, then washed with pure water and vacuum-dried to obtain the modified bamboo fiber; (6) Modified polyester fiber and modified bamboo fiber are blended in a mass ratio of 60:40 to obtain blended yarn; the blended yarn is woven to obtain fabric; the surface density of the fabric is 100g / m 2 ; Mix the fabric, finishing agent and triethylamine in a mass ratio of 1:20:0.1, stir at 50℃ for 40 minutes, take out and roll with a rolling rate of 70%, pre-bake at 100℃ for 10 minutes, and bake at 150℃ for 1 minute to obtain an antibacterial and deodorizing blended fabric.

[0022] Example 2: A method for preparing an antibacterial and deodorizing blended fabric, comprising the following steps: (1) 5,6-dihydroxyindole and acetic anhydride were mixed in a molar ratio of 1:2.04, pyridine (5.5 times the mass of 5,6-dihydroxyindole) was added, the mixture was reacted at room temperature for 12 hours, pure water (5.5 times the mass of pyridine) at 4°C was added, the mixture was filtered and dried to obtain acylated indole; ethylene glycol, dimethyl terephthalate and acylated indole were mixed in a molar ratio of 1:0.7:0.45, the mixture was added to a reactor, zinc acetate (0.2% of the mass of dimethyl terephthalate) was added, the mixture was reacted at 175°C for 3.5 hours, antimony trioxide (0.15% of the mass of dimethyl terephthalate) was added, the mixture was heated to 195°C, vacuumed to -0.1 MPa, the mixture was reacted for another 4 hours, the mixture was cooled to room temperature and restored to atmospheric pressure, the mixture was added to dichloromethane (35 times the mass of dimethyl terephthalate), methanol (3.5 times the volume of dichloromethane) was added, the mixture was filtered and dried in vacuum to obtain indole polyester; (2) Indole polyester is sheared and granulated to obtain pellets, the pellets are spun through a melt spinning machine, and then drawn and heat treated to prepare indole polyester fibers; indole polyester fibers, ammonium persulfate, ferric chloride, and p-toluenesulfonic acid are weighed in a mass ratio of 1:0.3:0.5:0.5, indole polyester fibers, chloroform, indole, and indole-6-carboxaldehyde are mixed in a mass ratio of 1:11:0.15:0.15 for 5 minutes, taken out and rolled, with a rolling rate of 80%, and then immersed in an oxidant mixture, the oxidant mixture solution being a mixture of ammonium persulfate, ferric chloride, p-toluenesulfonic acid, and chloroform with a mass of 100 times that of ammonium persulfate; stirred at room temperature for 5.5 hours, taken out and washed and dried to obtain pre-modified polyester fibers; the spinning temperature of the melt spinning machine is 230°C, the drawing ratio is 1.5 times, and the heat treatment temperature is 80°C; the linear density of the indole polyester fibers is 1.6 dtex; (3) Pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.25:25, heated to 85°C and reacted for 5.5 hours. After the reaction, the mixture was filtered and washed three times with N,N-dimethylformamide, and redispersed in N,N-dimethylformamide with a mass 25 times that of the pre-modified polyester fiber. Sodium borohydride with a mass 0.1 times that of the pre-modified polyester fiber was added, and the mixture was reacted at room temperature for 35 minutes. Acetic acid was used to adjust the pH to 7, and the modified polyester fiber was obtained by filtration, washing with pure water, and vacuum drying. (4) Bamboo fiber, acid mixture and sodium nitrite were mixed in a mass ratio of 1:30:0.3, stirred at room temperature in the dark for 1 hour, filtered and washed with pure water 3 times, and then redispersed in a 1 mg / mL propylene glycol solution 30 times the mass of the bamboo fiber and soaked for 20 minutes. Then, the mixture was taken out and washed with pure water 3 times, and dried at 55 ° C to obtain carboxylated bamboo fiber; carboxylated bamboo fiber, acetonitrile, 1-hydroxybenzotriazole and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride were mixed in a mass ratio of 1:0.25:0.25:35 and reacted at 22 ° C for 1.5 hours. After the reaction is completed, the temperature is lowered to 3°C, and an 80wt% hydrazine hydrate solution of 0.01 times the mass of the bamboo fiber is added, and the reaction is continued for 3.5 hours. After the reaction is completed, sodium hydroxide is used to adjust the pH to 8, and the pretreated bamboo fiber is obtained by filtration, washing with pure water, and vacuum drying. Carbon disulfide, ethanol, and potassium hydroxide are mixed in a mass ratio of 1:55:0.65 for 10 minutes, and 5.5 times the mass of carbon disulfide pretreated bamboo fiber is added. The temperature is raised to 45°C and the reaction is carried out for 2 hours. The temperature is continued to be raised to 76°C and refluxed for 1.5 hours. After the reaction is completed, the pre-modified bamboo fiber is obtained by filtration, washing with pure water, and vacuum drying. (5) Pre-modified bamboo fiber, acetonitrile, 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, and benzil dimethyl ether were mixed in a mass ratio of 1:35:0.25:0.01; the mixture was irradiated under an ultraviolet lamp with a power of 100 W and a wavelength of 365 nm for 35 min. After the reaction, the mixture was taken out and vacuum-dried at room temperature to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor, ammonium molybdate, 30 wt% hydrogen peroxide, and ethanol were mixed in a mass ratio of 1:0.001:10:55, and reacted at room temperature for 3.5 h. After the reaction, the mixture was filtered and washed three times with saturated sodium bicarbonate, then washed with pure water, and vacuum-dried to obtain the modified bamboo fiber; (6) Modified polyester fiber and modified bamboo fiber are blended in a mass ratio of 60:40 to obtain blended yarn; the blended yarn is woven to obtain fabric; the surface density of the fabric is 90g / m 2 ; Mix the fabric, finishing agent and triethylamine in a mass ratio of 1:20:0.1, stir at 50℃ for 35 minutes, take out and roll with a rolling rate of 65%, pre-bake at 93℃ for 10 minutes, and bake at 150℃ for 1 minute to obtain an antibacterial and deodorizing blended fabric.

[0023] Example 3: A method for preparing an antibacterial and deodorizing blended fabric, comprising the following steps: (1) 5,6-dihydroxyindole and acetic anhydride were mixed in a molar ratio of 1:2.05, pyridine (6 times the mass of 5,6-dihydroxyindole) was added, and the mixture was reacted at room temperature for 12 hours. Pure water (6 times the mass of pyridine) at 4°C was added, and the mixture was filtered and dried to obtain acylated indole. Ethylene glycol, dimethyl terephthalate, and acylated indole were mixed in a molar ratio of 1:0.8:0.5, and added to a reactor. Zinc acetate (0.2% by mass of dimethyl terephthalate) was added, and the mixture was reacted at 170°C for 3 hours. Antimony trioxide (0.15% by mass of dimethyl terephthalate) was added, and the mixture was heated to 190°C, evacuated to -0.1 MPa, and reacted for another 3 hours. The mixture was cooled to room temperature and returned to atmospheric pressure, and the mixture was added to dichloromethane (40 times the mass of dimethyl terephthalate), and methanol (4 times the volume of dichloromethane) was added. The mixture was filtered and dried in a vacuum to obtain indole polyester. (2) Indole polyester is sheared and granulated to obtain pellets, the pellets are spun through a melt spinning machine, and then drawn and heat treated to prepare indole polyester fibers; indole polyester fibers, ammonium persulfate, ferric chloride, and p-toluenesulfonic acid are weighed in a mass ratio of 1:0.3:0.5:0.5, indole polyester fibers, chloroform, indole, and indole-6-carboxaldehyde are mixed in a mass ratio of 1:12:0.2:0.2 for 5 minutes, taken out and rolled, with a rolling rate of 80%, and then immersed in an oxidant mixture, the oxidant mixture solution being a mixture of ammonium persulfate, ferric chloride, p-toluenesulfonic acid, and chloroform with a mass of 100 times that of ammonium persulfate; stirred at room temperature for 5 hours, taken out and washed and dried to obtain pre-modified polyester fibers; the spinning temperature of the melt spinning machine is 210°C, the drawing ratio is 1.5 times, and the heat treatment temperature is 80°C; the linear density of the indole polyester fibers is 1.6 dtex; (3) Pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.3:30, heated to 80°C and reacted for 5 hours. After the reaction, the mixture was filtered and washed three times with N,N-dimethylformamide, and redispersed in N,N-dimethylformamide with a mass 30 times that of the pre-modified polyester fiber. Sodium borohydride with a mass 0.1 times that of the pre-modified polyester fiber was added, and the mixture was reacted at room temperature for 30 minutes. Acetic acid was used to adjust the pH to 7, and the modified polyester fiber was obtained by filtration, washing with pure water, and vacuum drying. (4) Bamboo fiber, acid mixture and sodium nitrite were mixed in a mass ratio of 1:30:0.3, stirred at room temperature in the dark for 1 hour, filtered and washed with pure water 3 times, and then redispersed in a 1 mg / mL propylene glycol solution 30 times the mass of bamboo fiber and soaked for 20 minutes. Then, taken out and washed with pure water 3 times, and dried at 50 ° C to obtain carboxylated bamboo fiber; carboxylated bamboo fiber, acetonitrile, 1-hydroxybenzotriazole and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride were mixed in a mass ratio of 1:0.3:0.3:40, reacted at 20 ° C for 1 minute, and the mixture was stirred for 1 hour at room temperature in the dark. h, after the reaction is completed, the temperature is lowered to 0°C, and an 80wt% hydrazine hydrate solution of 0.01 times the mass of the bamboo fiber is added, and the reaction is continued for 3 hours. After the reaction is completed, sodium hydroxide is used to adjust the pH to 8, and the pretreated bamboo fiber is obtained by filtering, washing with pure water, and vacuum drying. Carbon disulfide, ethanol, and potassium hydroxide are mixed in a mass ratio of 1:60:0.7 for 10 minutes, and 6 times the mass of the carbon disulfide pretreated bamboo fiber is added. The temperature is raised to 40°C and the reaction is carried out for 2 hours. The temperature is further raised to 75°C and refluxed for 1 hour. After the reaction is completed, the pre-modified bamboo fiber is obtained by filtering, washing with pure water, and vacuum drying. (5) Pre-modified bamboo fiber, acetonitrile, 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, and benzil dimethyl ether were mixed in a mass ratio of 1:40:0.3:0.01; the mixture was irradiated under an ultraviolet lamp with a power of 100 W and a wavelength of 365 nm for 30 min. After the reaction, the mixture was taken out and vacuum-dried at room temperature to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor, ammonium molybdate, 30 wt% hydrogen peroxide, and ethanol were mixed in a mass ratio of 1:0.001:10:60, and reacted at room temperature for 3 h. After the reaction, the mixture was filtered and washed three times with saturated sodium bicarbonate, then washed with pure water, and vacuum-dried to obtain the modified bamboo fiber; (6) Modified polyester fiber and modified bamboo fiber are blended in a mass ratio of 60:40 to obtain blended yarn; the blended yarn is woven to obtain fabric; the surface density of the fabric is 80g / m 2 ; Mix the fabric, finishing agent and triethylamine in a mass ratio of 1:20:0.1, stir at 50℃ for 30 minutes, take out and roll with a rolling rate of 60%, pre-bake at 90℃ for 10 minutes, and bake at 150℃ for 1 minute to obtain an antibacterial and deodorizing blended fabric.

[0024] Comparative Example 1: The preparation method of the antibacterial and deodorizing blended fabric in Comparative Example 1 differs from that in Example 2 in that step (3) is not included, and step (2) is modified as follows: indole polyester is sheared and granulated to obtain pellets, the pellets are spun through a melt spinning machine, and then drawn and heat-treated to prepare modified polyester fibers.

[0025] Comparative Example 2: The preparation method of the antibacterial and deodorizing blended fabric in Comparative Example 2 differs from that in Example 2 in that the method does not contain steps (4) to (5), and step (6) is modified as follows: modified polyester fiber and bamboo fiber are blended in a mass ratio of 60:40 to obtain a blended yarn; the blended yarn is woven to obtain a fabric; the surface density of the fabric is 90 g / m 2 ; Mix the fabric, finishing agent and triethylamine in a mass ratio of 1:20:0.1, stir at 50℃ for 35 minutes, take out and roll with a rolling rate of 65%, pre-bake at 93℃ for 10 minutes, and bake at 150℃ for 1 minute to obtain an antibacterial and deodorizing blended fabric.

[0026] Comparative Example 3: The preparation method of the antibacterial and deodorizing blended fabric of Comparative Example 3 differs from that of Example 2 in that step (5) is not included. Step (3) is modified as follows: pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide are mixed in a mass ratio of 1:0.25:25, heated to 85°C and reacted for 5.5 hours. After the reaction, the mixture is filtered and washed three times with N,N-dimethylformamide. The modified polyester fiber is filtered, washed with pure water, and vacuum dried to obtain the modified polyester fiber. Step (6) is modified as follows: modified polyester fiber and pre-modified bamboo fiber are blended in a mass ratio of 60:40 to obtain blended yarn; the blended yarn is woven to obtain fabric; the surface density of the fabric is 90g / m 2 ; Mix the fabric, finishing agent and triethylamine in a mass ratio of 1:20:0.1, stir at 50℃ for 35 minutes, take out and roll with a rolling rate of 65%, pre-bake at 93℃ for 10 minutes, and bake at 150℃ for 1 minute to obtain an antibacterial and deodorizing blended fabric.

[0027] Test Example 1: Durability test: Test method: The fabrics prepared in the examples and comparative examples were washed in accordance with ISO105C10 washing standards, with a bath ratio of 50:1, using pure water and standard laundry detergent to prepare a washing liquid with a concentration of 2g / L, and the washing temperature was set to 60°C. The fabrics were soaped for 30 minutes, and then washed with pure water and dried at 60°C. The water cycle was repeated 15 times, and the weight loss rate was calculated; the weight loss rate (%) , where M0 is the weight before washing and M1 is the weight after washing. The results are shown in Table 1.

[0028]

[0029] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1, it can be found that the antibacterial and deodorizing blended fabric prepared by the present invention has good durability.

[0030] By comparison, the weight loss rates of Examples 1 to 3 are lower than those of Comparative Examples 1 to 3, indicating that the modified polyester fiber and the modified bamboo fiber are blended to produce a fabric; the fabric is treated with a finishing agent to obtain an antibacterial and deodorizing blended fabric, wherein the finishing agent is polyethylene glycol containing chlorine at both ends. The oxygen atoms in the polyethylene glycol can form hydrogen bonds with water molecules, thereby providing the fabric with hygroscopic properties. The chlorine at both ends of the polyethylene glycol can react with the secondary amino groups on the polyester fiber and the secondary amino groups on the bamboo fiber. The two fibers are cross-linked by the polyethylene glycol, which can prevent the polyethylene glycol from falling off during the washing process.

[0031] Test Example 2: Antibacterial performance test: Test method: According to the standard GB / T 20944.2-2007, the fabrics prepared in the examples and comparative examples were tested for their antibacterial rate. The results are shown in Table 2.

[0032]

[0033] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 2, it can be found that the antibacterial and deodorizing blended fabric prepared by the present invention has good antibacterial properties.

[0034] By comparison, the antibacterial rates of Examples 1 to 3 are greater than that of Comparative Example 2, indicating that, secondly, after the bamboo fiber containing carboxyl groups on the surface reacts with 1-hydroxybenzotriazole, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, and hydrazine hydrate, the carboxyl groups are converted into amide groups, and the potassium ethylxanthate generated by carbon disulfide and potassium hydroxide reacts with the hydrazide group, and then cyclizes to form an oxadiazole containing a thiol group. The thiol group and 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione are grafted onto 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione through a thiol-alkenyl click chemistry reaction, and the thiol group is converted into a thioether. Finally, under an oxidation system, the thioether is converted into a sulfone structure. The oxadiazole sulfone has good antibacterial properties and can provide antibacterial properties for the fabric.

[0035] Test Example 3: Antistatic performance test: Test Method: The test method was conducted in accordance with the half-life method specified in GB / T 12703.1—2021, "Test Methods for Electrostatic Discharge of Textiles." The fabrics prepared in the Examples and Comparative Examples were discharged at 10 kV for 10 seconds on a rotating metal platform, and the half-life was measured. The results are shown in Table 3.

[0036]

[0037] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 3, it can be found that the antibacterial and deodorizing blended fabric prepared by the present invention has good mechanical properties and anti-ultraviolet aging properties.

[0038] The half-lives of Examples 1 to 3 are shorter than that of Comparative Example 1, indicating that ethylene glycol, dimethyl terephthalate, and acylated indole are polymerized to obtain indole-based polyesters; these are then melt-spun to prepare fibers; and the indole groups, indole, and indole-6-carboxaldehyde on the fiber surface are chemically oxidatively polymerized to generate polyindole with aldehyde groups in the side chains. Acid-doped polyindole is a good conductive material that can provide good antistatic properties for fabrics.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing an antibacterial and deodorizing blended fabric, characterized in that: The method comprises the following preparation steps: (1) reacting 5,6-dihydroxyindole and acetic anhydride to obtain acylated indole; polymerizing ethylene glycol, dimethyl terephthalate and acylated indole to obtain indole-based polyester; (2) After the indole-based polyester is sheared and granulated, it is spun into indole-based polyester fiber by a melt spinning machine; the indole-based polyester fiber, indole, and indole-6-carboxaldehyde are reacted to obtain a pre-modified polyester fiber; (3) reacting the pre-modified polyester fiber and 4-(aminomethyl)-2,6-di-tert-butylphenol, and then reducing the pre-modified polyester fiber with sodium borohydride; (4) reacting carboxylated bamboo fiber, 1-hydroxybenzotriazole, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and hydrazine hydrate to obtain pretreated bamboo fiber; reacting carbon disulfide, potassium hydroxide and pretreated bamboo fiber to obtain pre-modified bamboo fiber; (5) reacting pre-modified bamboo fiber and 1-(2-propylene)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione to obtain a modified bamboo fiber precursor; oxidizing the modified bamboo fiber precursor with an ammonium molybdate-30wt% hydrogen peroxide system to obtain modified bamboo fiber; (6) The modified polyester fiber and the modified bamboo fiber are blended to obtain a fabric; and the fabric is treated with a finishing agent to obtain an antibacterial and deodorizing blended fabric.

2. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The preparation method of the indole polyester in step (1) is as follows: 5,6-dihydroxyindole and acetic anhydride are mixed in a molar ratio of 1: (2.03-2.05), pyridine is added in an amount of 5-6 times the mass of 5,6-dihydroxyindole, the mixture is reacted at room temperature for 12 hours, pure water at 4°C is added in an amount of 5-6 times the mass of pyridine, and the acylated indole is obtained by filtering and drying; ethylene glycol, dimethyl terephthalate and acylated indole are mixed in a molar ratio of 1: (0.6-0.8): (0.4-0.5), and the mixture is added to a reaction kettle. Add zinc acetate (0.2% by mass of dimethyl terephthalate), react at 170-180°C for 3-4h, add antimony trioxide (0.15% by mass of dimethyl terephthalate), heat to 190-200°C, evacuate to -0.1MPa, react for 3-5h, cool to room temperature and return to atmospheric pressure, add to dichloromethane (30-40 times by volume of dimethyl terephthalate), add methanol (3-4 times by volume of dichloromethane), filter and vacuum dry to obtain indole polyester.

3. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The preparation method of the pre-modified polyester fiber in step (2) is as follows: indole polyester is sheared and granulated to obtain pellets, the pellets are spun by a melt spinning machine, and then drawn and heat treated to prepare indole polyester fiber; indole polyester fiber, ammonium persulfate, ferric chloride, and p-toluenesulfonic acid are weighed in a mass ratio of 1:0.3:0.5:0.5, indole polyester fiber, chloroform, indole, and indole-6-carboxaldehyde are weighed in a mass ratio of 1:(10-12):(0.1-0.2):(0.1-0.2) The mixture was mixed for 5 minutes, taken out for rolling with a rolling ratio of 80%, and then immersed in an oxidant mixed solution, wherein the oxidant mixed solution was a mixture of ammonium persulfate, ferric chloride, p-toluenesulfonic acid, and chloroform with a mass of 100 times that of ammonium persulfate; stirred at room temperature for 5-6 hours, taken out, washed, and dried to obtain a pre-modified polyester fiber; the spinning temperature of the melt spinning machine was 210-240°C, the drafting multiple was 1.5 times, and the heat treatment temperature was 80°C; the linear density of the indole polyester fiber was 1.6dtex.

4. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The preparation method of the modified polyester fiber in step (3) is as follows: pre-modified polyester fiber, 4-(aminomethyl)-2,6-di-tert-butylphenol, and N,N-dimethylformamide are mixed in a mass ratio of 1: (0.2-0.3): (20-30), heated to 80-90°C and reacted for 5-6 hours. After the reaction is completed, the mixture is filtered and washed with N,N-dimethylformamide for 3-4 times, and redispersed in N,N-dimethylformamide with a mass of 20-30 times that of the pre-modified polyester fiber, and sodium borohydride with a mass of 0.1 times that of the pre-modified polyester fiber is added, and reacted at room temperature for 30-40 minutes. Acetic acid is used to adjust the pH to 7, and the modified polyester fiber is obtained by filtering, washing with pure water, and vacuum drying.

5. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The method for preparing the pre-modified bamboo fiber in step (4) is as follows: carboxylated bamboo fiber, acetonitrile, 1-hydroxybenzotriazole, and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride are mixed in a mass ratio of 1: (0.2-0.3): (0.2-0.3): (30-40), reacted at 20-25° C. for 1-2 h, cooled to 0-5° C. after the reaction is completed, and 80 wt % hydrazine hydrate solution of 0.01 times the mass of the bamboo fiber is added, and the reaction is continued for 3-4 h. After the reaction is completed, The pH value was adjusted to 8-9 using sodium hydroxide, and the pretreated bamboo fiber was obtained by filtration, pure water washing, and vacuum drying. Carbon disulfide, ethanol, and potassium hydroxide were mixed at a mass ratio of 1: (50-60): (0.6-0.7) for 10 minutes, and 5-6 times the mass of carbon disulfide was added to the pretreated bamboo fiber. The temperature was raised to 40-50°C and reacted for 2 hours, and the temperature was continued to be raised to 75-80°C for reflux reaction for 1-2 hours. After the reaction, the pre-modified bamboo fiber was obtained by filtration, pure water washing, and vacuum drying.

6. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The preparation method of the modified bamboo fiber in step (5) is as follows: pre-modified bamboo fiber, acetonitrile, 1-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, and benzil dimethyl ether are mixed in a mass ratio of 1:(30-40):(0.2-0.3):0.01; the mixture is subjected to an illumination reaction for 30-40 minutes under an ultraviolet lamp with a power of 100 W and a wavelength of 365 nm, and after the reaction is completed, the mixture is taken out and vacuum dried at room temperature to obtain a modified bamboo fiber precursor; the modified bamboo fiber precursor, ammonium molybdate, 30wt% hydrogen peroxide, and ethanol are mixed in a mass ratio of 1:0.001:10:(50-60), and the mixture is reacted at room temperature for 3-4 hours. After the reaction is completed, the mixture is filtered and washed with saturated sodium bicarbonate for 3-4 times, and then washed with pure water and vacuum dried to obtain the modified bamboo fiber.

7. The method for preparing an antibacterial and deodorizing blended fabric according to claim 1, characterized in that: The preparation method of the antibacterial and deodorizing blended fabric in step (6) is as follows: modified polyester fiber and modified bamboo fiber are blended in a mass ratio of 60:40 to obtain a blended yarn; the blended yarn is weaved to obtain a fabric; the surface density of the fabric is 80-100 g / m 2 ; The fabric, finishing agent and triethylamine are mixed in a mass ratio of 1:20:0.1, stirred at 50°C for 30-40 minutes, taken out for rolling, the rolling rate is 60%-70%, pre-baked at 90-100°C for 10 minutes, and baked at 150°C for 1 minute to obtain an antibacterial and deodorizing blended fabric; the finishing agent is dichloropolyethylene glycol with a molecular weight of 2000.

8. The method for preparing an antibacterial and deodorizing blended fabric according to claim 5, characterized in that: The preparation method of the carboxylated bamboo fiber is as follows: bamboo fiber, acid mixture and sodium nitrite are mixed in a mass ratio of 1:30:0.3, stirred for 1 hour at room temperature and in the dark, filtered and washed with pure water for 3-4 times, and then redispersed in a 1 mg / mL propylene glycol solution of 30 times the mass of the bamboo fiber and immersed for 20 minutes, taken out, washed with pure water and dried to obtain the carboxylated bamboo fiber; the acid mixture is obtained by mixing nitric acid and phosphoric acid in a volume ratio of 2:1; the fineness of the bamboo fiber is 1.5 dtex.

9. An antibacterial and deodorizing blended fabric prepared according to the method for preparing an antibacterial and deodorizing blended fabric according to any one of claims 1 to 8.

10. Use of the antibacterial and deodorizing blended fabric prepared by the method for preparing the antibacterial and deodorizing blended fabric according to any one of claims 1 to 8 in underwear.

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