An antibacterial textile fiber material and its preparation process

Abstract

The present invention discloses an antibacterial textile fiber material and its preparation process, belonging to the technical field of fiber materials. The antibacterial textile fiber material comprises the following raw materials by weight: 105 - 120 parts of polyurethane fiber, 30 - 40 parts of acetate fiber, and 1.2 - 2.1 parts of a modified antibacterial agent; the modified antibacterial agent is obtained by reacting bamboo charcoal fiber containing hydroxyl groups, isocyanate, chitosan quaternary ammonium salt, ethylenediamine, nano-zinc oxide, and a colorless triazine ultraviolet absorber; by dissolving the polyurethane fiber and acetate fiber in organic solvent A, adding the modified antibacterial agent and performing ultrasonic treatment, and then aging to form a spinning stock solution, and obtaining the antibacterial textile fiber material through dry spinning. The antibacterial textile fiber material of the present invention has excellent antibacterial properties, good durability of antibacterial properties, and is easy to operate in the preparation process.

Description

Technical Field

[0001] The present invention relates to an antibacterial textile fiber material and a preparation process thereof, belonging to the technical field of fiber materials. Background Art

[0002] Textile fiber materials are the basic components of textiles and have an important impact on the functional characteristics of textiles. Textile fiber materials include naturally occurring natural fibers such as plant fibers, animal fibers, and mineral fibers, as well as chemically processed chemical fibers such as rayon, synthetic fibers, and inorganic fibers.

[0003] Spandex fiber, also known as polyurethane fiber, is a kind of chemical fiber. Due to its excellent elasticity, strong abrasion resistance, good air permeability, and good shape retention after washing, it has a wide range of applications, including: clothing such as swimsuits, sportswear, underwear, and socks; household products such as sofa covers and mattress covers; medical supplies such as elastic bandages and rehabilitation products. However, spandex textile fiber materials are prone to bacterial growth, causing odors and infections. To improve the antibacterial property of spandex textile fiber materials, antibacterial agents are usually added to the textile fiber materials. However, due to the shedding of antibacterial agents during washing, aging of antibacterial agents during long-term use or exposure to sunlight and high temperatures, the durability of antibacterial performance is insufficient. Summary of the Invention

[0004] At least aiming at one problem existing in the above prior art, the present invention provides an antibacterial textile fiber material and a preparation process thereof. The antibacterial textile fiber material has excellent antibacterial performance, good durability of antibacterial performance, and easy operation in the preparation process.

[0005] To achieve the above object, the present invention adopts the following technical scheme: An antibacterial textile fiber material, by weight, comprises the following raw materials: 105 - 120 parts of polyurethane fiber, 30 - 40 parts of acetate fiber, and 1.2 - 2.1 parts of a modified antibacterial agent.

[0006] The modified antibacterial agent is obtained by reacting bamboo charcoal fiber containing hydroxyl groups, isocyanate, chitosan quaternary ammonium salt, ethylenediamine, nano-zinc oxide, and colorless triazine ultraviolet absorber.

[0007] Preferably, the modified antibacterial agent, by weight, comprises the following raw materials: 4.8 - 5.4 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 - 2.3 parts of isocyanate, 1.7 - 2.1 parts of chitosan quaternary ammonium salt, 0.3 - 0.5 parts of ethylenediamine, 0.4 - 0.7 parts of nano-zinc oxide, and 0.2 - 0.3 parts of colorless triazine ultraviolet absorber.

[0008] Preferably, the preparation process of the modified antibacterial agent is as follows: Add bamboo charcoal fibers containing hydroxyl groups to an acetone solvent that is 2 to 3 times the weight of the bamboo charcoal fibers containing hydroxyl groups. After ultrasonic treatment, add isocyanate and chitosan quaternary ammonium salt, heat to 65 to 70 °C and stir for 90 to 120 minutes. Then add ethylenediamine, nano-zinc oxide, and a colorless triazine ultraviolet absorber, cool to 30 to 35 °C and stir for 40 to 50 minutes. After filtration and rinsing, vacuum dry at 95 to 100 °C to obtain the modified antibacterial agent.

[0009] Preferably, the frequency of ultrasonic treatment is 50 to 60 KHz, and the time is 10 to 15 minutes.

[0010] Preferably, the chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan.

[0011] Preferably, the colorless triazine ultraviolet absorber is one of Cyasorb UV-1164, Tinuvin 1577, or Tinuvin 1600.

[0012] Preferably, the bamboo charcoal fibers containing hydroxyl groups are obtained by treating the surface of bamboo charcoal fibers with hydrogen peroxide oxidation.

[0013] Preferably, the preparation process of the bamboo charcoal fibers containing hydroxyl groups is as follows: Place the bamboo charcoal fibers in 30% hydrogen peroxide solution, perform ultrasonic treatment at 50 to 60 KHz for 30 to 40 minutes, then heat to 60 to 65 °C and treat for 120 to 150 minutes, filter and wash with water, and vacuum dry at 110 to 120 °C to obtain the bamboo charcoal fibers containing hydroxyl groups.

[0014] The present invention also provides a preparation process for an antibacterial textile fiber material. The preparation steps are as follows: First, dissolve polyurethane fibers and acetate fibers in organic solvent A, then add the modified antibacterial agent and perform ultrasonic treatment, and then cure to form a spinning stock solution, and obtain the antibacterial textile fiber material through dry spinning.

[0015] Preferably, the organic solvent A is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5.

[0016] Preferably, the dosage of organic solvent A is 2.5 to 3 times the mass of the polyurethane fibers.

[0017] Preferably, a preparation process method for an antibacterial textile fiber material is as follows:

[0018] (1) First, place the polyurethane fibers and acetate fibers in organic solvent A, then heat to 30 to 35 °C and stir until completely dissolved to obtain stock solution A;

[0019] (2) Add a modified antibacterial agent to the feed liquid A. After stirring evenly, perform ultrasonic homogenization to obtain the feed liquid B;

[0020] (3) Age the feed liquid B to obtain a spinning dope;

[0021] (4) Perform dry spinning with the spinning dope to obtain an antibacterial textile fiber material.

[0022] Preferably, for the ultrasonic homogenization conditions in step (2), the frequency is 20 - 25 KHz, and the time is 15 - 20 min.

[0023] Preferably, for the aging conditions in step (3), the temperature is 40 - 45 °C, and the time is 12 - 18 h.

[0024] Preferably, for the dry spinning conditions in step (4), the spinning speed is 750 - 850 m / min, and the spinning temperature is 240 - 250 °C.

[0025] Advantages of the present invention:

[0026] 1. The antibacterial textile fiber material of the present invention uses polyurethane fiber, acetate fiber, and a modified antibacterial agent. The modified antibacterial agent uses bamboo charcoal fiber containing hydroxyl groups as the matrix, and through modification, molecular structures such as hydroxyl groups, amino groups, and quaternary ammonium salts are contained, improving the compatibility and bonding strength between the modified antibacterial agent and polyurethane fiber and acetate fiber. While ensuring the mechanical properties, the antibacterial performance and antibacterial persistence of the antibacterial textile fiber material are improved.

[0027] 2. The modified antibacterial agent of the present invention reacts with hydroxyl groups through isocyanate, directly grafts isocyanate to the bamboo charcoal fiber containing hydroxyl groups, and indirectly grafts chitosan quaternary ammonium salt. At the same time, under the chain extension of hydroxyl groups and isocyanate by ethylenediamine, nano-zinc oxide and colorless triazine ultraviolet absorbers are encapsulated. In addition, chitosan quaternary ammonium salt chelates nano-zinc oxide, so that a stable combination is formed between the raw materials of the modified antibacterial agent, not only improving the antibacterial and anti-odor performance and persistence of the modified antibacterial agent, but also taking into account the compatibility and high-temperature resistance characteristics of the modified antibacterial agent.

[0028] 3. For the antibacterial textile fiber material of the present invention, the modified antibacterial agent promotes the improvement of the interfacial bonding ability of the components of the antibacterial textile fiber material through molecular structures such as hydroxyl groups, amino groups, and quaternary ammonium salts, solves the problem of the antibacterial agent falling off due to washing, and through the synergy of nano-zinc oxide and colorless triazine ultraviolet absorbers, solves the problem that the antibacterial agent will age due to long-term use or exposure to sunlight and high temperature, thereby effectively enhancing the antibacterial performance and antibacterial persistence of the antibacterial textile fiber material.

[0029] 4. The antibacterial textile fiber material of the present invention uses acetate fiber in cooperation with polyurethane fiber to improve the moisture absorption, sweat wicking and air permeability of the antibacterial textile fiber material, and at the same time improve the overall thermal stability of the antibacterial textile fiber material, further enhancing the durability of the antibacterial agent. Detailed implementation mode

[0030] The following is a clear and complete description of the technical solutions in the implementation of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention. For those not specified in the embodiments, the conventional conditions or the conditions recommended by the manufacturer are followed. For the reagents, instruments or components not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0031] Preparation of bamboo charcoal fiber containing hydroxyl groups in Preparation Example 1

[0032] The preparation process is as follows: 1 g of bamboo charcoal fiber is placed in 100 ml of 30% hydrogen peroxide, ultrasonically treated at 50 - 60 KHz for 30 - 40 min, then heated to 60 - 65 °C for 120 - 150 min, filtered and washed with water, and vacuum dried at 110 - 120 °C to obtain bamboo charcoal fiber containing hydroxyl groups.

[0033] Preparation Example 1 is used in the following examples.

[0034] Example 1

[0035] An antibacterial textile fiber material, calculated by weight, comprises the following raw materials: 120 parts of polyurethane fiber, 40 parts of acetate fiber and 1.2 parts of modified antibacterial agent;

[0036] The modified antibacterial agent, calculated by weight, comprises the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, 0.3 part of ethylenediamine, 0.4 part of nano zinc oxide, 0.2 part of Cyasorb UV-1164;

[0037] The preparation process of the antibacterial textile fiber material is as follows:

[0038] (1) Preparation of modified antibacterial agent: 4.8 parts of bamboo charcoal fiber containing hydroxyl group was added to 12 parts of acetone solvent, and ultrasonically treated at a frequency of 55KHz for 10 minutes. Then, 1.8 parts of isocyanate and 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan were added, and the mixture was heated to 65-70°C and stirred for 110 minutes. Then, 0.3 parts of ethylenediamine, 0.4 parts of nano zinc oxide, and 0.2 parts of ultraviolet absorber Cyasorb UV-1164 were added, and the mixture was cooled to 30-35°C and stirred for 45 minutes. After filtration and washing, the modified antibacterial agent was obtained by vacuum drying at 95-100°C for later use.

[0039] (2) First, 120 parts of polyurethane fiber and 40 parts of acetate fiber are placed in 330 parts of organic solvent A which is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5, and then heated to 30-35°C and stirred until completely dissolved to obtain liquid A;

[0040] (3) Add 1.2 parts of modified antimicrobial agent to liquid A, stir evenly, and homogenize by ultrasound at a frequency of 22 kHz for 10 min to obtain liquid B;

[0041] (4) aging the liquid B at a temperature of 40-45° C. for 18 hours to obtain a spinning liquid;

[0042] (5) Dry spinning is performed on the spinning liquid at a spinning speed of 800 m / min and a spinning temperature of 245° C. to obtain an antibacterial textile fiber material.

[0043] Example 2

[0044] An antibacterial textile fiber material, comprising the following raw materials, measured by weight: 113 parts of polyurethane fiber, 35 parts of acetate fiber and 1.7 parts of modified antibacterial agent;

[0045] The raw materials and weight portions of the modified antibacterial agent are the same as those in Example 1;

[0046] The preparation process of the antibacterial textile fiber material comprises the following specific preparation steps:

[0047] (1) The preparation of the modified antibacterial agent is the same as that in Example 1;

[0048] (2) First, 113 parts of polyurethane fiber and 35 parts of acetate fiber are placed in 339 parts of organic solvent A which is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5, and then heated to 30-35°C and stirred until completely dissolved to obtain liquid A;

[0049] (3) Add 1.7 parts of modified antimicrobial agent to liquid A, stir evenly, and homogenize by ultrasound at a frequency of 20 kHz for 12 min to obtain liquid B;

[0050] (4) Age the liquid material B at 40 - 45 °C for 15 h to obtain the spinning dope.

[0051] (5) Perform dry spinning on the spinning dope at a spinning speed of 800 m / min and a spinning temperature of 245 °C to obtain the antibacterial textile fiber material.

[0052] Example 3

[0053] An antibacterial textile fiber material, by weight, comprises the following raw materials: 105 parts of polyurethane fiber, 30 parts of acetate fiber, and 2.1 parts of modified antibacterial agent;

[0054] The raw materials and their parts by weight of the modified antibacterial agent are the same as those in Example 1;

[0055] The preparation process of the antibacterial textile fiber material is as follows:

[0056] (1) The preparation of the modified antibacterial agent is the same as that in Example 1;

[0057] (2) First, put 105 parts of polyurethane fiber and 30 parts of acetate fiber into 263 parts of organic solvent A which is a mixture of N,N - dimethylacetamide and acetone in a volume ratio of 1:1.5, and then heat to 30 - 35 °C and stir until completely dissolved to obtain liquid material A;

[0058] (3) Add 2.1 parts of the modified antibacterial agent to liquid material A, stir evenly, and then perform ultrasonic homogenization at a frequency of 25 KHz for 15 min to obtain liquid material B;

[0059] (4) Age the liquid material B at 40 - 45 °C for 12 h to obtain the spinning dope;

[0060] (5) Perform dry spinning on the spinning dope at a spinning speed of 800 m / min and a spinning temperature of 245 °C to obtain the antibacterial textile fiber material.

[0061] Example 4

[0062] An antibacterial textile fiber material, by weight, comprises the following raw materials: 110 parts of polyurethane fiber, 37 parts of acetate fiber, and 1.8 parts of modified antibacterial agent;

[0063] The raw materials and their parts by weight of the modified antibacterial agent are the same as those in Example 1;

[0064] The preparation process of the antibacterial textile fiber material is as follows:

[0065] (1) The preparation of the modified antibacterial agent is the same as that in Example 1;

[0066] (2) First, 110 parts of polyurethane fiber and 37 parts of acetate fiber are placed in 308 parts of organic solvent A, which is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5. Then, it is heated to 30 - 35 °C and stirred until completely dissolved to obtain feed liquid A;

[0067] (3) 1.8 parts of modified antibacterial agent are added to feed liquid A. After stirring evenly, it is homogenized by ultrasonic wave at a frequency of 20 KHz for 12 min to obtain feed liquid B;

[0068] (4) Feed liquid B is aged at a temperature of 40 - 45 °C for 15 h to obtain spinning dope;

[0069] (5) Dry spinning is carried out with the spinning dope, and antibacterial textile fiber materials are obtained at a spinning speed of 800 m / min and a spinning temperature of 245 °C.

[0070] Example 5

[0071] An antibacterial textile fiber material, the raw materials and their parts by weight are the same as those in Example 4;

[0072] The modified antibacterial agent, calculated by weight, includes the following raw materials: 5.2 parts of bamboo charcoal fiber containing hydroxyl groups, 2.1 parts of isocyanate, 1.9 parts of hydroxypropyltrimethylammonium chloride chitosan, 0.4 parts of ethylenediamine, 0.55 parts of nano-zinc oxide, and 0.25 parts of Cyasorb UV-1164;

[0073] The preparation process of this antibacterial textile fiber material is as follows:

[0074] (1) Preparation of the modified antibacterial agent: 5.2 parts of bamboo charcoal fiber containing hydroxyl groups are added to 15.6 parts of acetone solvent, ultrasonic-treated at a frequency of 50 KHz for 12 min, then 3.1 parts of isocyanate and 1.9 parts of hydroxypropyltrimethylammonium chloride chitosan are added, heated to 65 - 70 °C and stirred for 90 min, then 0.4 parts of ethylenediamine, 0.4 parts of nano-zinc oxide, and 0.25 parts of ultraviolet absorber Cyasorb UV-1164 are added, cooled to 30 - 35 °C and stirred for 40 min, and then obtained by suction filtration, rinsing, and vacuum drying at 95 - 100 °C for standby;

[0075] The remaining steps are the same as those in Example 4.

[0076] Example 6

[0077] An antibacterial textile fiber material, the raw materials and their parts by weight are the same as those in Example 4;

[0078] Modified antibacterial agent, by weight, includes the following raw materials: 5.4 parts of bamboo charcoal fiber containing hydroxyl groups, 2.3 parts of isocyanate, 2.1 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 0.5 part of ethylenediamine, 0.7 part of nano zinc oxide, 0.3 part of Cyasorb UV-1164;

[0079] The preparation process of the antibacterial textile fiber material is as follows:

[0080] (1) Preparation of the modified antibacterial agent: Add 5.4 parts of bamboo charcoal fiber containing hydroxyl groups to 10.8 parts of acetone solvent, ultrasonically treat for 15 min at a frequency of 60 KHz, then add 2.3 parts of isocyanate and 2.1 parts of hydroxypropyl trimethyl ammonium chloride chitosan, heat to 65 - 70 °C and stir for 120 min, then add 0.5 part of ethylenediamine, 0.7 part of nano zinc oxide, 0.3 part of the ultraviolet absorber Cyasorb UV-1164, cool to 30 - 35 °C and stir for 50 min, filter by suction, rinse, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0081] The remaining steps are the same as those in Example 4.

[0082] Example 7

[0083] An antibacterial textile fiber material, with the same raw materials and their weights as in Example 6;

[0084] Modified antibacterial agent, by weight, includes the following raw materials: 5.4 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 2.1 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 0.3 part of ethylenediamine, 0.7 part of nano zinc oxide, 0.3 part of Tinuvin 1577;

[0085] The preparation process of the antibacterial textile fiber material is as follows:

[0086] (1) Preparation of the modified antibacterial agent: Add 5.4 parts of bamboo charcoal fiber containing hydroxyl groups to 10.8 parts of acetone solvent, ultrasonically treat for 15 min at a frequency of 60 KHz, then add 1.8 parts of isocyanate and 2.1 parts of hydroxypropyl trimethyl ammonium chloride chitosan, heat to 65 - 70 °C and stir for 120 min, then add 0.3 part of ethylenediamine, 0.4 part of nano zinc oxide, 0.3 part of the ultraviolet absorber Tinuvin 1577, cool to 30 - 35 °C and stir for 50 min, filter by suction, rinse, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0087] The remaining steps are the same as those in Example 6.

[0088] Example 8

[0089] An antibacterial textile fiber material, by weight, comprises the following raw materials: 110 parts of polyurethane fiber, 37 parts of acetate fiber, and 1.5 parts of a modified antibacterial agent;

[0090] The modified antibacterial agent, by weight, comprises the following raw materials: 5.2 parts of bamboo charcoal fiber containing hydroxyl groups, 2.3 parts of isocyanate, 2 parts of hydroxypropyltrimethylammonium chloride chitosan, 0.35 part of ethylenediamine, 0.5 part of nano-zinc oxide, and 0.25 part of Tinuvin 1577;

[0091] The preparation process of the antibacterial textile fiber material is as follows:

[0092] (1) Preparation of the modified antibacterial agent: Add 5.2 parts of bamboo charcoal fiber containing hydroxyl groups to 10.4 parts of acetone solvent, ultrasonically treat at a frequency of 60 KHz for 15 min, then add 2.3 parts of isocyanate and 2 parts of hydroxypropyltrimethylammonium chloride chitosan, heat to 65 - 70 °C and stir for 120 min, then add 0.35 part of ethylenediamine, 0.5 part of nano-zinc oxide, and 0.25 part of the ultraviolet absorber Tinuvin 1577, cool to 30 - 35 °C and stir for 50 min, filter by suction, rinse, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0093] (2) First, place 110 parts of polyurethane fiber and 37 parts of acetate fiber in 308 parts of organic solvent A composed of N,N-dimethylacetamide and acetone mixed in a volume ratio of 1:1.5, then heat to 30 - 35 °C and stir until completely dissolved to obtain liquid A;

[0094] (3) Add 1.5 parts of the modified antibacterial agent to liquid A, stir evenly, and then ultrasonically homogenize at a frequency of 20 KHz for 10 min to obtain liquid B;

[0095] (4) Cure liquid B at a temperature of 40 - 45 °C for 12 h to obtain a spinning dope;

[0096] (5) Perform dry spinning on the spinning dope at a spinning speed of 750 m / min and a spinning temperature of 250 °C to obtain the antibacterial textile fiber material.

[0097] Comparative Example 1

[0098] An antibacterial textile fiber material, with the same raw materials and their weights as in Example 1;

[0099] The modified antibacterial agent, by weight, comprises the following raw materials: 4.8 parts of bamboo charcoal fiber, 1.7 parts of isohydroxypropyltrimethylammonium chloride chitosan, 0.4 part of nano-zinc oxide, and 0.2 part of Cyasorb UV-1164;

[0100] The preparation process of the antibacterial textile fiber material is as follows:

[0101] (1) Preparation of the modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber to 12 parts of acetone solvent, ultrasonically treat it for 10 min at a frequency of 55 KHz, then add 1.7 parts of hydroxypropyl trimethyl ammonium chloride chitosan, heat it to 65 - 70 °C and stir for 110 min, then add 0.4 part of nano-zinc oxide and 0.2 part of ultraviolet absorber Cyasorb UV-1164, cool it to 30 - 35 °C and stir for 45 min, and obtain the modified antibacterial agent after suction filtration, rinsing, and vacuum drying at 95 - 100 °C for standby;

[0102] The remaining steps are the same as those in Example 1.

[0103] Comparative Example 2

[0104] An antibacterial textile fiber material, the raw materials and their parts by weight are the same as those in Example 1;

[0105] The modified antibacterial agent, calculated by weight, includes the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.7 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 0.4 part of nano-zinc oxide, and 0.2 part of Cyasorb UV-1164;

[0106] The preparation process of the antibacterial textile fiber material is as follows:

[0107] (1) Preparation of the modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber containing hydroxyl groups to 12 parts of acetone solvent, ultrasonically treat it for 10 min at a frequency of 55 KHz, then add 1.7 parts of hydroxypropyl trimethyl ammonium chloride chitosan, heat it to 65 - 70 °C and stir for 110 min, then add 0.4 part of nano-zinc oxide and 0.2 part of ultraviolet absorber Cyasorb UV-1164, cool it to 30 - 35 °C and stir for 45 min, and obtain the modified antibacterial agent after suction filtration, rinsing, and vacuum drying at 95 - 100 °C for standby;

[0108] The remaining steps are the same as those in Example 1.

[0109] Comparative Example 3

[0110] An antibacterial textile fiber material, the raw materials and their parts by weight are the same as those in Example 1;

[0111] The modified antibacterial agent, calculated by weight, includes the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 1.7 parts of hydroxypropyl trimethyl ammonium chloride chitosan, and 0.3 part of ethylenediamine;

[0112] (1)Preparation of modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber containing hydroxyl groups to 12 parts of acetone solvent, ultrasonically treat it for 10 min at a frequency of 55 KHz, then add 1.8 parts of isocyanate and 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, heat to 65 - 70 °C and stir for reaction for 110 min, then add 0.3 parts of ethylenediamine, cool down to 30 - 35 °C and stir for 45 min, carry out suction filtration and rinsing, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0113] The remaining steps are the same as those in Example 1.

[0114] Comparative Example 4

[0115] An antibacterial textile fiber material, with the raw materials and their weight parts being the same as those in Example 1;

[0116] The modified antibacterial agent, calculated by weight parts, includes the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, 0.3 parts of ethylenediamine, 0.2 parts of Cyasorb UV - 1164;

[0117] (1)Preparation of modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber containing hydroxyl groups to 12 parts of acetone solvent, ultrasonically treat it for 10 min at a frequency of 55 KHz, then add 1.8 parts of isocyanate and 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, heat to 65 - 70 °C and stir for reaction for 110 min, then add 0.3 parts of ethylenediamine and 0.2 parts of ultraviolet absorber Cyasorb UV - 1164, cool down to 30 - 35 °C and stir for 45 min, carry out suction filtration and rinsing, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0118] The remaining steps are the same as those in Example 1.

[0119] Comparative Example 5

[0120] An antibacterial textile fiber material, with the raw materials and their weight parts being the same as those in Example 1;

[0121] The modified antibacterial agent, calculated by weight parts, includes the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, 0.3 parts of ethylenediamine, 0.4 parts of nano - zinc oxide;

[0122] The preparation process of this antibacterial textile fiber material is as follows:

[0123] (1)Preparation of modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber containing hydroxyl groups to 12 parts of acetone solvent, ultrasonically treat it at a frequency of 55 KHz for 10 min, then add 1.8 parts of isocyanate and 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan, heat to 65 - 70 °C and stir for reaction for 110 min, then add 0.3 parts of ethylenediamine and 0.4 parts of nano-zinc oxide, cool down to 30 - 35 °C and stir for 45 min, and obtain the modified antibacterial agent through suction filtration, rinsing, and vacuum drying at 95 - 100 °C for standby;

[0124] The remaining steps are the same as those in Example 1.

[0125] Comparative Example 6

[0126] An antibacterial textile fiber material, with the raw materials and their parts by weight being the same as those in Example 1;

[0127] The modified antibacterial agent, by weight, includes the following raw materials: 4.8 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 parts of isocyanate, 0.3 parts of ethylenediamine, 0.4 parts of nano-zinc oxide, and 0.2 parts of Cyasorb UV-1164;

[0128] The preparation process of this antibacterial textile fiber material is as follows:

[0129] (1)Preparation of modified antibacterial agent: Add 4.8 parts of bamboo charcoal fiber containing hydroxyl groups to 12 parts of acetone solvent, ultrasonically treat it at a frequency of 55 KHz for 10 min, then add 1.8 parts of isocyanate, heat to 65 - 70 °C and stir for reaction for 110 min, then add 0.3 parts of ethylenediamine, 0.4 parts of nano-zinc oxide, and 0.2 parts of ultraviolet absorber Cyasorb UV-1164, cool down to 30 - 35 °C and stir for 45 min, and obtain the modified antibacterial agent through suction filtration, rinsing, and vacuum drying at 95 - 100 °C for standby;

[0130] The remaining steps are the same as those in Example 1.

[0131] Comparative Example 7

[0132] An antibacterial textile fiber material, by weight, includes the following raw materials: 160 parts of polyurethane fiber and 1.2 parts of modified antibacterial agent;

[0133] The raw materials of the modified antibacterial agent and their parts by weight are the same as those in Example 1;

[0134] The preparation process of this antibacterial textile fiber material is as follows:

[0135] (1)The preparation of the modified antibacterial agent is the same as that in Example 1;

[0136] (2) First, place 160 parts of polyurethane fiber in 330 parts of organic solvent A, which is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5, and then heat to 30 - 35 °C and stir until completely dissolved to obtain liquid material A;

[0137] The remaining steps are the same as those in Example 1.

[0138] Comparative Example 8

[0139] An antibacterial textile fiber material, with the raw materials and their parts by weight being the same as those in Example 1;

[0140] The raw materials of the modified antibacterial agent and their parts by weight are the same as those in Example 1;

[0141] The preparation process of this antibacterial textile fiber material is as follows. The specific preparation steps are partly the same as those in Example 1, with the difference being: In step (3), add 1.2 parts of the modified antibacterial agent to liquid material A, stir evenly to obtain liquid material B.

[0142] Comparative Example 9

[0143] An antibacterial textile fiber material, with the raw materials and their parts by weight being the same as those in Example 1;

[0144] The modified antibacterial agent, by parts by weight, includes the following raw materials: 1.7 parts of isohydroxypropyltrimethylammonium chloride chitosan, 0.4 parts of nano zinc oxide, and 0.2 parts of Cyasorb UV-1164;

[0145] The preparation process of this antibacterial textile fiber material is as follows:

[0146] (1) Preparation of the modified antibacterial agent: Add 1.7 parts of hydroxypropyltrimethylammonium chloride chitosan to 12 parts of acetone solvent, heat to 65 - 70 °C and stir for 110 min, then add 0.4 parts of nano zinc oxide and 0.2 parts of the ultraviolet absorber Cyasorb UV-1164, cool to 30 - 35 °C and stir for 45 min, perform suction filtration and rinsing, and vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent for standby;

[0147] The remaining steps are the same as those in Example 1.

[0148] Effect test

[0149] Weave the antibacterial textile fiber materials of Examples 1 - 8 and the antibacterial textile fiber materials of Comparative Examples 1 - 8 above into corresponding antibacterial fabrics respectively, and test the antibacterial fabrics corresponding to Examples 1 - 8 and Comparative Examples 1 - 8. The antibacterial properties, antibacterial persistence, breathable, moisture absorption, and elastic properties are shown in Table 1-1, Table 1-2, and Table 2 respectively.

[0150] I. Air permeability, moisture absorption and elasticity

[0151] 1. The air permeability is tested by the water dish method. The test conditions are: wet bulb temperature 25°C, dry bulb temperature 35°C, relative humidity 45%, time 2h, and specimen area 38 cm × 38 cm;

[0152] 2. The moisture absorption is measured under standard conditions: 20°C, 65% RH;

[0153] 3. The elasticity is tested by the FCP14 method;

[0154] II. Antibacterial property and antibacterial durability

[0155] 4. The antibacterial property is in accordance with FZ / T 73023 - 2006:

[0156] a) The antibacterial durability without high - temperature or sun exposure treatment;

[0157] b) The antibacterial durability after high - temperature treatment, boiling at 100°C for 10 min before each washing;

[0158] c) The antibacterial durability after sun exposure, sunning for 2h under sunlight after each washing.

[0159] Table 1 Antibacterial property and antibacterial durability

[0160] Table 1 - 1 Examples 1 - 8

[0161]

[0162] Table 1 - 2 Comparative Examples 1 - 9

[0163]

[0164] Table 2 Air permeability, moisture absorption and elasticity

[0165]

[0166] As can be seen from Table 1-1, Table 1-2 and Table 2, the antibacterial textile fiber material prepared according to the present invention not only has excellent antibacterial properties, but also the modified antibacterial agent increases the interfacial binding ability between the components of the antibacterial textile fiber material through molecular structures such as hydroxyl groups, amino groups, and quaternary ammonium salts, effectively avoiding the shedding of antibacterial components in the antibacterial textile fiber, and through the synergy of nano-zinc oxide and colorless triazine ultraviolet absorbers, effectively improving the anti-aging function of the antibacterial components in the antibacterial textile fiber during long-term use or exposure to sunlight and high temperatures, so that the antibacterial time of the antibacterial textile fiber material is long and the antibacterial persistence is excellent; in addition, acetate fiber is also used in combination with polyurethane fiber, while ensuring that the fabric has a soft and comfortable hand feeling and excellent tensile elasticity, improving the moisture absorption, sweat discharge and breathability of the antibacterial textile fiber material, and also ensuring the overall thermal stability of the antibacterial textile fiber material, further enhancing the persistence of the antibacterial agent.

[0167] It is found through Example 1 and Comparative Example 1, Comparative Example 2 and Comparative Example 9 that in the modified antibacterial agent, bamboo charcoal fiber containing hydroxyl groups is used, which can not only maintain the unique antibacterial properties of bamboo charcoal fiber, but also promote the antibacterial textile fiber material to maintain a certain antibacterial persistence in high-temperature or sun-exposed environments; in addition, through the reaction of isocyanate and ethylenediamine, not only the surface roughness of bamboo charcoal fiber is increased, but also the bamboo charcoal fiber containing hydroxyl groups can be combined with chitosan quaternary ammonium salt, effectively improving the interfacial binding strength between the modified antibacterial agent and polyurethane fiber and acetate fiber, and at the same time can encapsulate nano-zinc oxide and colorless triazine ultraviolet absorbers, thereby improving the antibacterial persistence of the antibacterial textile fiber material and also helping to increase the elasticity, breathability and moisture absorption of the antibacterial textile fiber material.

[0168] It is found through Example 1 and Comparative Example 3, Comparative Example 4, Comparative Example 5 that in the modified antibacterial agent, nano-zinc oxide and colorless triazine ultraviolet absorbers are used, which not only synergistically improve the antibacterial properties of the antibacterial textile fiber material, but also promote the antibacterial components of the antibacterial textile fiber material to have excellent weather resistance and improve the antibacterial persistence of the antibacterial textile fiber material in high-temperature or sun-exposed environments.

[0169] It is found through Example 1 and Comparative Example 6 that in the modified antibacterial agent, chitosan quaternary ammonium salt is used, which not only synergistically improves the antibacterial properties of the antibacterial textile fiber material, but also can chelate nano-zinc oxide, further increasing the antibacterial properties and antibacterial persistence of the antibacterial textile fiber material, and helping to increase the elasticity, breathability and moisture absorption of the antibacterial textile fiber material.

[0170] It was found through Example 1 and Comparative Example 7 that in the antibacterial textile fiber material, when acetate fiber is used in combination with polyurethane fiber, while ensuring the elasticity of the antibacterial textile fiber material, the hygroscopicity and air permeability of the antibacterial textile fiber material can be greatly improved, and the heat resistance of the antibacterial textile fiber material is increased, providing further protection for the modified antibacterial agent, which helps to improve the antibacterial persistence of the antibacterial textile fiber material.

[0171] It was found through Example 1 and Comparative Example 8 that in the preparation process of the antibacterial textile fiber material, ultrasonic homogenization followed by aging spinning can effectively improve the interfacial bonding strength between the modified antibacterial agent and polyurethane fiber and acetate fiber, and improve the antibacterial persistence of the antibacterial textile fiber material.

[0172] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit and basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0173] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An antibacterial textile fiber material, characterized in that, By weight, it includes the following raw materials: 105 - 120 parts of polyurethane fiber, 30 - 40 parts of acetate fiber, and 1.2 - 2.1 parts of modified antibacterial agent; The modified antibacterial agent is obtained by reacting bamboo charcoal fiber containing hydroxyl groups, isocyanate, chitosan quaternary ammonium salt, ethylenediamine, nano-zinc oxide, and colorless triazine ultraviolet absorber; The preparation process of the modified antibacterial agent is as follows: Add bamboo charcoal fiber containing hydroxyl groups to acetone solvent which is 2 - 3 times the weight of the bamboo charcoal fiber containing hydroxyl groups. After ultrasonic treatment, add isocyanate and chitosan quaternary ammonium salt, heat to 65 - 70 °C and stir for reaction for 90 - 120 min. Then add ethylenediamine, nano-zinc oxide, and colorless triazine ultraviolet absorber, cool to 30 - 35 °C and stir for 40 - 50 min. After filtration and rinsing, vacuum dry at 95 - 100 °C to obtain the modified antibacterial agent; The preparation process of the antibacterial textile fiber material is as follows: First, dissolve polyurethane fiber and acetate fiber in organic solvent A, then add the modified antibacterial agent and perform ultrasonic treatment, and then ripen to form a spinning stock solution, and obtain the antibacterial textile fiber material through dry spinning.

2. An antibacterial textile fiber material according to claim 1, wherein, The modified antibacterial agent, by weight, includes the following raw materials: 4.8 - 5.4 parts of bamboo charcoal fiber containing hydroxyl groups, 1.8 - 2.3 parts of isocyanate, 1.7 - 2.1 parts of chitosan quaternary ammonium salt, 0.3 - 0.5 parts of ethylenediamine, 0.4 - 0.7 parts of nano-zinc oxide, and 0.2 - 0.3 parts of colorless triazine ultraviolet absorber.

3. An antibacterial textile fiber material according to claim 1, characterized in that, The frequency of ultrasonic treatment is 50 - 60 KHz, and the time is 10 - 15 min.

4. An antibacterial textile fiber material according to claim 1 or 2, characterized in that, The chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan; the colorless triazine ultraviolet absorber is one of Cyasorb UV-1164, Tinuvin1577, or Tinuvin 1600; the bamboo charcoal fiber containing hydroxyl groups is obtained by treating the surface of bamboo charcoal fiber with hydrogen peroxide oxidation.

5. A method for preparing the antibacterial textile fiber material according to claim 1, characterized in that, The specific preparation steps of the antibacterial textile fiber material are as follows: (1) First, place polyurethane fiber and acetate fiber in organic solvent A, and then heat to 30 - 35 °C and stir until completely dissolved to obtain stock solution A; (2) Add the modified antibacterial agent to stock solution A, stir evenly, and then perform ultrasonic homogenization to obtain stock solution B; (3) Ripen stock solution B to obtain a spinning stock solution; (4) Perform dry spinning on the spinning stock solution to obtain the antibacterial textile fiber material.

6. The preparation method of the antibacterial textile fiber material according to claim 5, characterized in that, The organic solvent A is a mixture of N,N-dimethylacetamide and acetone in a volume ratio of 1:1.5; the dosage of the organic solvent A is 2.5 - 3 times the mass of the polyurethane fiber.

7. The preparation method of the antibacterial textile fiber material according to claim 1 or 5, characterized in that, The conditions of ultrasonic homogenization are a frequency of 20 - 25 KHz and a time of 15 - 20 min.

8. The preparation method of the antibacterial textile fiber material according to claim 1 or 5, characterized in that, The ripening conditions are a temperature of 40 - 45 °C and a time of 12 - 18 h.

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