A moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric, a preparation method thereof, and application thereof in underwear

Abstract

The invention discloses a moisture wicking polyester-ammonia blended antibacterial fabric, a preparation method thereof, and an application in underwear, and relates to the technical field of fabrics. When preparing the moisture wicking polyester-ammonia blended antibacterial fabric, the present invention firstly reacts phosphorus-containing polyester and dinitrobenzylpyridine to obtain modified polyester, uses melt spinning to prepare the polyester into fibers, and then reduces; secondly, uses thiophene-3-ol and polyurethane prepolymer to react, prepares fibers through a dry spinning process, and then reacts with thiophene and 3-aminothiophene to obtain modified polyurethane fibers; finally, the modified polyester fiber and the modified polyurethane fiber are blended into yarn, reacted with toluene diisocyanate, and then reacted with isophorone diisocyanate to obtain modified yarn, and the modified yarn is woven into fabric to obtain the moisture wicking polyester-ammonia blended antibacterial fabric. The moisture wicking polyester-ammonia blended antibacterial fabric prepared by the present invention has good antibacterial properties, antistatic properties, and mechanical properties.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, in particular to a moisture-absorbing and perspiration-releasing polyester-ammonia blended antibacterial fabric, a preparation method thereof, and application in underwear. Background Art

[0002] The choice of underwear fabric is crucial to the comfort, durability and functionality of underwear. Among the many fabric options, polyester-spandex blended fabrics occupy an important position in underwear production due to their unique advantages. This blended fabric cleverly combines the strengths of polyester and spandex fibers, bringing many aspects of performance improvement to underwear. Polyester is known for its high strength, good abrasion resistance, non-fading, and excellent heat and light resistance, while spandex, as a high-performance elastic fiber, enables underwear to fit closely to the body curves, providing excellent support and shaping effects for the wearer. The use of knitting technology can further improve the breathability and moisture absorption of underwear.

[0003] However, polyester-spandex blended fabrics also have some disadvantages. First, since polyester and spandex are both synthetic fibers, their moisture absorption is relatively poor, which may result in the underwear failing to quickly absorb and dissipate sweat during high-intensity exercise or prolonged activities, thus affecting the comfort of wearing and providing an environment for bacteria to grow. Second, blended fabrics are prone to static electricity, which not only reduces the comfort of the underwear, but also may absorb dust and hair, affecting the appearance and hygiene of the underwear.

[0004] In summary, polyester-spandex blended fabrics have many advantages in underwear production, but they also have some disadvantages. By taking a series of improvement measures, such as improving hydrolysis resistance, improving moisture absorption and breathability, antistatic treatment and antibacterial treatment, the quality and comfort of underwear can be further improved. Summary of the invention

[0005] The object of the present invention is to provide a moisture absorbing and perspiration wicking polyester / ammonia blended antibacterial 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 a moisture wicking polyester / ammonia blended antibacterial fabric, comprising the following preparation steps:

[0007] (1) reacting dichloromethylphosphonic acid and ethylene glycol to obtain a phosphorus-containing diol; reacting ethylene glycol, the phosphorus-containing diol and dimethyl terephthalate to obtain a phosphorus-containing polyester;

[0008] (2) reacting phosphorus-containing polyester and dinitrobenzylpyridine to obtain pre-modified polyester; shearing and granulating the pre-modified polyester, spinning it through a melt spinning machine, and then drawing and heat treating it to prepare a pre-modified polyester fiber precursor;

[0009] (3) reacting the pre-modified polyester fiber precursor with a sodium sulfide-sodium carbonate mixed solution to obtain a modified polyester fiber;

[0010] (4) reacting thiophene-3-ol and a polyurethane prepolymer to obtain a modified polyurethane; preparing the modified polyurethane into a spinning solution and spinning the solution through a dry spinning process to obtain a pre-modified polyurethane fiber;

[0011] (5) reacting the pre-modified polyurethane fiber, hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate to obtain a modified polyurethane fiber;

[0012] (6) blending the modified polyester fiber and the modified polyurethane fiber to obtain a blended yarn; mixing the blended yarn and toluene diisocyanate to obtain a pre-modified yarn;

[0013] (7) The pre-modified yarn, isophorone diisocyanate, and 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide are reacted, and then dibutyltin dilaurate and N,N-dimethylethanolamine are reacted to obtain a modified yarn; the modified yarn is woven to obtain a moisture wicking polyester-ammonia blended antibacterial fabric.

[0014] As an optimization, the preparation method of the moisture wicking polyester-ammonia blended antibacterial fabric comprises the following preparation steps:

[0015] (1) Take chloromethylphosphonic acid dichloride and ethylene glycol in a molar ratio of 1:2, add chloromethylphosphonic acid dichloride to ethylene glycol at 0°C, heat to 40°C, react for 2.5 hours, and evaporate ethylene glycol at 110°C under reduced pressure to obtain phosphorus-containing diol; mix ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate in a molar ratio of 1:0.2:(2.5-2.7), add to a reactor, add zinc acetate at a mass ratio of 0.2% of dimethyl terephthalate, evacuate to 0.1 KPa, after nitrogen purging, heat to 170-180°C, react for 3-4 hours, add antimony trioxide at a mass ratio of 0.15% of dimethyl terephthalate, heat to 230-240°C, react at 50 Pa for 2-3 hours, cool to room temperature and return to atmospheric pressure to obtain phosphorus-containing polyester;

[0016] (2) mixing phosphorus-containing polyester, dinitrobenzylpyridine and N,N-dimethylformamide in a mass ratio of 1: (0.3-0.5): (20-30), heating to 110° C. for reaction for 6-8 hours, and after the reaction is completed, performing vacuum rotary evaporation to obtain a pre-modified polyester; shearing and granulating the pre-modified polyester, spinning it through a melt spinning machine, and then drawing and heat treating it to prepare a pre-modified polyester fiber precursor;

[0017] (3) mixing the pre-modified polyester fiber precursor and the sodium sulfide-sodium carbonate mixed solution in a mass ratio of 1:(30-40), reacting at 98° C. for 40-50 min, and washing with pure water and drying after the reaction to obtain the modified polyester fiber;

[0018] (4) mixing thiophene-3-ol, polyurethane prepolymer and tetrahydrofuran in a mass ratio of (0.1-0.2):1:(10-12), reacting at room temperature for 8-10 hours, and distilling under reduced pressure at -0.1 MPa and 45°C for 40 minutes after the reaction to obtain a modified polyurethane; preparing a spinning solution with a mass fraction of 15 wt% by weight with the modified polyurethane and N'N-dimethylformamide, spinning the spinning solution by a dry spinning process to obtain a pre-modified polyurethane fiber;

[0019] (5) Pre-modified polyurethane fiber, 0.02 mol / L hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate are mixed in a mass ratio of 1: (100-110): (10-15): (5-7): (3-4), reacted at 30-40° C. for 6-8 h, washed with pure water after the reaction, and vacuum dried at 40° C. to obtain modified polyurethane fiber;

[0020] (6) Blending the modified polyester fiber and the modified polyurethane fiber at a mass ratio of 40 / 60 by siro spinning to obtain a blended yarn; mixing the blended yarn, toluene, dibutyltin dilaurate, and toluene diisocyanate at a mass ratio of 1: (20-30): 0.01: (5-6), heating to 60° C. to react for 4-5 hours, taking out after the reaction is completed, and vacuum drying at room temperature to obtain a pre-modified yarn;

[0021] (7) Pre-modified yarn, isophorone diisocyanate, 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide and xylene are mixed in a mass ratio of 1: (2-3): (0.03-0.04): (20-30), the temperature is raised to 150-160°C for reaction for 6-8 hours, the temperature is lowered to 80°C, 0.01 times the mass of the pre-modified yarn dibutyltin dilaurate and 10-12 times the mass of the pre-modified yarn N,N-dimethylethanolamine are added, the reaction is continued for 5-6 hours, and after the reaction is completed, the yarn is taken out, washed with pure water and vacuum dried at room temperature to obtain the modified yarn; the modified yarn is woven using a single-sided weft knitting circular machine to obtain a moisture wicking polyester-ammonia blended antibacterial fabric.

[0022] As an optimization, the sodium sulfide-sodium carbonate mixed solution in step (3) is obtained by mixing sodium sulfide, sodium carbonate and pure water. The concentration of sodium sulfide in the sodium sulfide-sodium carbonate mixed solution is 25 g / L, and the concentration of sodium carbonate is 20 g / L.

[0023] As an optimization, in step (2), the spinning hole diameter of the melt spinning machine is 0.7 mm, the spinning temperature is 210-240°C, the drafting multiple is 1.5 times, the heat treatment temperature is 80°C, and the linear density of the pre-modified polyester fiber precursor is 4.6 tex.

[0024] As an optimization, the polyurethane prepolymer model in step (4) is E95C.

[0025] As an optimization, the dry spinning process parameters of step (4) are a temperature of 230° C. and a spinning speed of 500 m / min; and the linear density of the pre-modified polyurethane fiber is 4 tex.

[0026] As an optimization, the surface density of the fabric in step (7) is 100 g / m 2 .

[0027] The present invention also provides a moisture wicking polyester / ammonia blended antibacterial fabric prepared according to the method for preparing the moisture wicking polyester / ammonia blended antibacterial fabric.

[0028] The present invention also provides an application of the moisture wicking polyester / ammonia blended antibacterial fabric prepared according to the preparation method of the moisture wicking polyester / ammonia blended antibacterial fabric in underwear.

[0029] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: when preparing the moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric, the present invention first prepares ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate into phosphorus-containing polyester, then reacts with dinitrobenzylpyridine to obtain modified polyester, uses a melt spinning process to prepare the polyester into fibers, and reduces them with sodium sulfide-sodium carbonate to obtain modified polyester fibers; secondly, uses thiophene-3-ol and polyurethane prepolymer to react, prepares fibers through a dry spinning process, and then reacts with thiophene and 3-aminothiophene to obtain modified polyurethane fibers; finally, the modified polyester fibers and modified polyurethane fibers are blended into yarns, reacted with toluene diisocyanate, and then reacted with isophorone diisocyanate to obtain modified yarns, and the modified yarns are woven into fabrics to obtain moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabrics.

[0030] Firstly, ethylene glycol, phosphorus-containing diol and dimethyl terephthalate are prepared into phosphorus-containing polyester. The introduction of phosphorus can improve the flame retardant properties of polyester. Secondly, the phosphorus-containing diol has a chloromethyl structure, which can react with dinitrobenzylpyridine to generate a quaternary ammonium salt of pyridine with antibacterial properties, thus giving the polyester good antibacterial properties and introducing a nitro group. The nitro group is converted into an amino group under the reduction of a sodium sulfide-sodium carbonate system. The presence of the quaternary ammonium salt can also improve the hygroscopic properties of the material.

[0031] Secondly, thiophene-3-ol is reacted with a polyurethane prepolymer, and the thiophene containing a hydroxyl group can terminate the isocyanate groups at both ends of the polyurethane prepolymer to obtain a polyurethane containing thiophene functional groups at both ends. The polyurethane is prepared into fibers through a dry spinning process. In the presence of potassium persulfate, thiophene and 3-aminothiophene are polymerized on the fiber surface to form polythiophene, and crosslinks are formed between the polyurethane molecular chains, which gives the polyurethane good conductive properties and improves the mechanical properties. Finally, the modified polyester fiber and the modified polyurethane fiber are blended into yarns, and the amino groups and modified The amino groups on the surface of the polyurethane react with toluene diisocyanate to graft isocyanate functional groups on the fiber surface, and then condense with isophorone diisocyanate to crosslink the two fibers through the carbodiimide structure. Carbodiimide has good hydrolysis resistance. During the hydrolysis of polyester materials, the ester bond is easily broken to generate carboxyl groups. Carbodiimide reacts with carboxyl groups to generate a stable ureide structure, which effectively eliminates the carboxyl groups that easily cause the self-catalytic hydrolysis of polyester materials, thereby inhibiting the molecular chain breakage and comprehensive physical property degradation caused by the hydrolysis of the polymer. This reaction not only improves the hydrolysis resistance of the material, but also restores or partially restores the performance of the polymer material damaged by hydrolysis, extending its service life. DETAILED DESCRIPTION

[0032] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0033] The sodium sulfide-sodium carbonate mixed solution in the following examples and comparative examples is obtained by mixing sodium sulfide, sodium carbonate and pure water. The concentration of sodium sulfide in the sodium sulfide-sodium carbonate mixed solution is 25 g / L, and the concentration of sodium carbonate is 20 g / L; the polyurethane prepolymer model is E95C, purchased from Shanghai Jiren International Trade Co., Ltd.; the chitosan has a deacetylation degree of 88% and an average molecular weight of 120,000.

[0034] Example 1

[0035] A method for preparing a moisture wicking polyester / ammonia blended antibacterial fabric, the method comprising the following preparation steps:

[0036] (1) Take chloromethylphosphonic acid dichloride and ethylene glycol in a molar ratio of 1:2, add chloromethylphosphonic acid dichloride to ethylene glycol at 0°C, heat to 40°C, react for 2.5 hours, and evaporate ethylene glycol at 110°C under reduced pressure to obtain phosphorus-containing diol; mix ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate in a molar ratio of 1:0.2:2.5, add to a reactor, add zinc acetate in an amount of 0.2% by weight of dimethyl terephthalate, evacuate to 0.1 KPa, purge with nitrogen, heat to 180°C, react for 4 hours, add antimony trioxide in an amount of 0.15% by weight of dimethyl terephthalate, heat to 240°C, react for 3 hours at 50 Pa, cool to room temperature, and return to atmospheric pressure to obtain phosphorus-containing polyester;

[0037] (2) Phosphorus-containing polyester, dinitrobenzylpyridine and N,N-dimethylformamide are mixed in a mass ratio of 1:0.3:20, heated to 110°C and reacted for 8 hours, and after the reaction is completed, a pre-modified polyester is obtained by vacuum rotary evaporation; the pre-modified polyester is sheared and granulated, spun by a melt spinning machine, and then drawn and heat treated to prepare a pre-modified polyester fiber precursor; the pre-modified polyester fiber precursor has a linear density of 4.6 tex;

[0038] (3) mixing the pre-modified polyester fiber precursor and the sodium sulfide-sodium carbonate mixed solution in a mass ratio of 1:30, reacting at 98° C. for 50 min, and washing with pure water and drying after the reaction to obtain the modified polyester fiber;

[0039] (4) Thiophene-3-ol, polyurethane prepolymer and tetrahydrofuran are mixed in a mass ratio of 0.1:1:10, reacted at room temperature for 10 hours, and after the reaction, vacuum distilled at -0.1 MPa and 45°C for 40 minutes to obtain a modified polyurethane; the modified polyurethane and N'N-dimethylformamide are prepared into a spinning solution with a mass fraction of 15wt%, and the spinning solution is spun by a dry spinning process to obtain a pre-modified polyurethane fiber; the dry spinning process parameters are a temperature of 230°C and a spinning speed of 500m / min; the pre-modified polyurethane fiber has a linear density of 4tex;

[0040] (5) Pre-modified polyurethane fiber, 0.02 mol / L hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate were mixed in a mass ratio of 1:100:10:5:3, reacted at 40°C for 8 h, washed with pure water after the reaction, and vacuum dried at 40°C to obtain modified polyurethane fiber;

[0041] (6) The modified polyester fiber and the modified polyurethane fiber are blended by siro spinning at a mass ratio of 40 / 60 to obtain a blended yarn; the blended yarn, toluene, dibutyltin dilaurate, and toluene diisocyanate are mixed at a mass ratio of 1:20:0.01:5, the temperature is raised to 60°C for reaction for 5 hours, and after the reaction is completed, the pre-modified yarn is taken out and vacuum dried at room temperature to obtain the pre-modified yarn;

[0042] (7) Pre-modified yarn, isophorone diisocyanate, 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide, and xylene were mixed in a mass ratio of 1:2:0.03:20, heated to 160°C for reaction for 8 hours, cooled to 80°C, and 0.01 times the mass of pre-modified yarn dibutyltin dilaurate and 10 times the mass of pre-modified yarn N,N-dimethylethanolamine were added, and the reaction was continued for 6 hours. After the reaction was completed, the yarn was taken out, washed with pure water, and vacuum dried at room temperature to obtain the modified yarn; the modified yarn was woven using a single-sided weft knitting circular machine to obtain a moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric; the fabric surface density was 100 g / m 2 .

[0043] Example 2

[0044] A method for preparing a moisture wicking polyester / ammonia blended antibacterial fabric, the method comprising the following preparation steps:

[0045] (1) Take chloromethylphosphonic acid dichloride and ethylene glycol in a molar ratio of 1:2, add chloromethylphosphonic acid dichloride to ethylene glycol at 0°C, heat to 40°C, react for 2.5 hours, and evaporate ethylene glycol at 110°C under reduced pressure to obtain phosphorus-containing diol; mix ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate in a molar ratio of 1:0.2:2.6, add to a reactor, add zinc acetate in an amount of 0.2% by weight of dimethyl terephthalate, evacuate to 0.1 KPa, purge with nitrogen, heat to 175°C, react for 3.5 hours, add antimony trioxide in an amount of 0.15% by weight of dimethyl terephthalate, heat to 235°C, react for 2.5 hours at 50 Pa, cool to room temperature, and return to atmospheric pressure to obtain phosphorus-containing polyester;

[0046] (2) Phosphorus-containing polyester, dinitrobenzylpyridine and N,N-dimethylformamide are mixed in a mass ratio of 1:0.4:25, heated to 110°C and reacted for 7 hours, and after the reaction is completed, pre-modified polyester is obtained by vacuum rotary evaporation; the pre-modified polyester is sheared and granulated, spun by a melt spinning machine, and then drawn and heat treated to prepare a pre-modified polyester fiber precursor; the pre-modified polyester fiber precursor has a linear density of 4.6 tex;

[0047] (3) mixing the pre-modified polyester fiber precursor and the sodium sulfide-sodium carbonate mixed solution in a mass ratio of 1:35, reacting at 98° C. for 45 minutes, and washing with pure water and drying after the reaction to obtain the modified polyester fiber;

[0048] (4) Thiophene-3-ol, polyurethane prepolymer and tetrahydrofuran are mixed in a mass ratio of 0.15:1:11, reacted at room temperature for 9 hours, and after the reaction, vacuum distilled at -0.1 MPa and 45°C for 40 minutes to obtain a modified polyurethane; the modified polyurethane and N'N-dimethylformamide are prepared into a spinning solution with a mass fraction of 15wt%, and the spinning solution is spun by a dry spinning process to obtain a pre-modified polyurethane fiber; the dry spinning process parameters are a temperature of 230°C and a spinning speed of 500m / min; the pre-modified polyurethane fiber has a linear density of 4tex;

[0049] (5) Pre-modified polyurethane fiber, 0.02 mol / L hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate were mixed in a mass ratio of 1:115:13:6:3.5, reacted at 35°C for 7 hours, washed with pure water after the reaction, and vacuum dried at 40°C to obtain modified polyurethane fiber;

[0050] (6) The modified polyester fiber and the modified polyurethane fiber are blended by siro spinning at a mass ratio of 40 / 60 to obtain a blended yarn; the blended yarn, toluene, dibutyltin dilaurate, and toluene diisocyanate are mixed at a mass ratio of 1:25:0.01:5.5, the temperature is raised to 60°C for reaction for 4.5 hours, and after the reaction is completed, the pre-modified yarn is taken out and vacuum dried at room temperature to obtain the pre-modified yarn;

[0051] (7) Pre-modified yarn, isophorone diisocyanate, 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide and xylene were mixed in a mass ratio of 1:2.5:0.035:25, heated to 155°C for reaction for 7 hours, cooled to 80°C, and 0.01 times the mass of pre-modified yarn dibutyltin dilaurate and 11 times the mass of pre-modified yarn N,N-dimethylethanolamine were added, and the reaction was continued for 5.5 hours. After the reaction was completed, the yarn was taken out, washed with pure water, and vacuum dried at room temperature to obtain the modified yarn; the modified yarn was woven using a single-sided weft knitting circular machine to obtain a moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric; the fabric surface density was 100 g / m 2 .

[0052] Example 3

[0053] A method for preparing a moisture wicking polyester / ammonia blended antibacterial fabric, the method comprising the following preparation steps:

[0054] (1) Take chloromethylphosphonic acid dichloride and ethylene glycol in a molar ratio of 1:2, add chloromethylphosphonic acid dichloride to ethylene glycol at 0°C, heat to 40°C, react for 2.5 hours, and evaporate ethylene glycol at 110°C under reduced pressure to obtain phosphorus-containing diol; mix ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate in a molar ratio of 1:0.2:2.7, add to a reactor, add zinc acetate in an amount of 0.2% by weight of dimethyl terephthalate, evacuate to 0.1 KPa, purge with nitrogen, heat to 170°C, react for 3 hours, add antimony trioxide in an amount of 0.15% by weight of dimethyl terephthalate, heat to 230°C, react for 2 hours at 50 Pa, cool to room temperature, and return to atmospheric pressure to obtain phosphorus-containing polyester;

[0055] (2) Phosphorus-containing polyester, dinitrobenzylpyridine and N,N-dimethylformamide are mixed in a mass ratio of 1:0.5:30, heated to 110°C and reacted for 6 hours, and after the reaction is completed, pre-modified polyester is obtained by vacuum rotary evaporation; the pre-modified polyester is sheared and granulated, spun by a melt spinning machine, and then drawn and heat treated to prepare a pre-modified polyester fiber precursor; the pre-modified polyester fiber precursor has a linear density of 4.6 tex;

[0056] (3) mixing the pre-modified polyester fiber precursor and the sodium sulfide-sodium carbonate mixed solution in a mass ratio of 1:40, reacting at 98° C. for 40 min, and washing with pure water and drying after the reaction to obtain the modified polyester fiber;

[0057] (4) Thiophene-3-ol, polyurethane prepolymer and tetrahydrofuran are mixed in a mass ratio of 0.2:1:12, reacted at room temperature for 8 hours, and after the reaction, vacuum distilled at -0.1 MPa and 45°C for 40 minutes to obtain a modified polyurethane; the modified polyurethane and N'N-dimethylformamide are prepared into a spinning solution with a mass fraction of 15wt%, and the spinning solution is spun by a dry spinning process to obtain a pre-modified polyurethane fiber; the dry spinning process parameters are a temperature of 230°C and a spinning speed of 500m / min; the pre-modified polyurethane fiber has a linear density of 4tex;

[0058] (5) Pre-modified polyurethane fiber, 0.02 mol / L hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate were mixed in a mass ratio of 1:110:15:7:4, reacted at 30°C for 6 hours, washed with pure water after the reaction, and vacuum dried at 40°C to obtain modified polyurethane fiber;

[0059] (6) The modified polyester fiber and the modified polyurethane fiber are blended by siro spinning at a mass ratio of 40 / 60 to obtain a blended yarn; the blended yarn, toluene, dibutyltin dilaurate, and toluene diisocyanate are mixed at a mass ratio of 1:30:0.01:6, the temperature is raised to 60°C for reaction for 4 hours, and after the reaction is completed, the pre-modified yarn is taken out and vacuum dried at room temperature to obtain the pre-modified yarn;

[0060] (7) Pre-modified yarn, isophorone diisocyanate, 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide, and xylene were mixed in a mass ratio of 1:3:0.04:30, heated to 150°C for reaction for 6 hours, cooled to 80°C, and 0.01 times the mass of the pre-modified yarn dibutyltin dilaurate and 12 times the mass of the pre-modified yarn N,N-dimethylethanolamine were added, and the reaction was continued for 5 hours. After the reaction was completed, the yarn was taken out, washed with pure water, and vacuum dried at room temperature to obtain the modified yarn; the modified yarn was woven using a single-sided weft knitting circular machine to obtain a moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric; the fabric surface density was 100 g / m 2 .

[0061] Comparative Example 1:

[0062] The method for preparing the moisture wicking polyester-ammonia blended antibacterial fabric of Comparative Example 1 differs from that of Example 2 in that step (3) is not included, and step (2) is modified as follows: the phosphorus-containing polyester is sheared and granulated, spun by a melt spinning machine, and then drawn and heat treated to prepare a pre-modified polyester fiber precursor; the pre-modified polyester fiber precursor has a linear density of 4.6 tex.

[0063] Comparative Example 2:

[0064] The preparation method of the moisture wicking polyester-ammonia blended antibacterial fabric of Comparative Example 2 differs from that of Example 2 in that step (5) is not included, and step (4) is modified as follows: thiophene-3-ol, polyurethane prepolymer, and tetrahydrofuran are mixed in a mass ratio of 0.15:1:11, reacted at room temperature for 9 hours, and after the reaction is completed, vacuum distilled for 40 minutes at -0.1 MPa and 45°C to obtain a modified polyurethane; the modified polyurethane and N'N-dimethylformamide are prepared into a spinning solution with a mass fraction of 15wt%, and the spinning solution is spun by a dry spinning process to obtain a modified polyurethane fiber; the dry spinning process parameters are a temperature of 230°C and a spinning speed of 500m / min; the pre-modified polyurethane fiber has a linear density of 4tex.

[0065] Comparative Example 3:

[0066] The preparation method of the moisture wicking polyester / ammonium blended antibacterial fabric of Comparative Example 3 differs from that of Example 2 in that step (6) is not included, and step (7) is modified as follows: the pre-modified yarn is weaved using a single-sided weft knitting circular machine to obtain a moisture wicking polyester / ammonium blended antibacterial fabric; the fabric surface density is 100 g / m 2 .

[0067] Test Example 1:

[0068] Antibacterial performance test:

[0069] Test method: The fabrics prepared in the examples and comparative examples were cut into samples of 10 cm×10 cm, and the antibacterial rate of these fabric samples was tested according to the provisions of GB / T20944.2-2007 "Evaluation of antibacterial properties of textiles Part 2: Absorption method". The results are shown in Table 1.

[0070]

[0071] 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 moisture absorbing and perspiration wicking polyester-ammonia blended antibacterial fabric prepared by the present invention has good antibacterial properties.

[0072] By comparison, the antibacterial rates of Examples 1 to 3 are greater than that of Comparative Example 1, indicating that ethylene glycol, phosphorus-containing diol, and dimethyl terephthalate are used to prepare phosphorus-containing polyesters. The phosphorus-containing diol has a chloromethyl structure and can react with dinitrobenzylpyridine to generate a quaternary ammonium pyridine salt with antibacterial properties, thereby giving the polyester good antibacterial properties.

[0073] Test Example 2:

[0074] Mechanical properties testing

[0075] Test method: The fabrics prepared in the examples and comparative examples were tested by using the shear strip method according to ASTM D5035-1995 (2003), with the length of the sample being 150 mm and the width being 25 mm, and the tensile strength was tested. The results are shown in Table 2.

[0076] Test of hydrolysis resistance: According to the test method of mechanical properties, the fabric was cut into samples, and the samples were mixed with 6 mol / L potassium hydroxide solution at a mass ratio of 1:30, and put into an oven and set the temperature to 80°C. After 72 hours, the samples were taken out, washed with pure water, dried, and then the tensile strength was tested according to the test method of mechanical properties and the tensile strength retention rate was calculated. The results are shown in Table 2.

[0077]

[0078] 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 moisture absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric prepared by the present invention has good mechanical properties and hydrolysis resistance.

[0079] By comparison, the tensile strength of Examples 1 to 3 is greater than that of Comparative Examples 2 and 3, and the tensile strength retention rate of Examples 1 to 3 is greater than that of Comparative Example 3, indicating that the modified polyester fiber and the modified polyurethane fiber are blended into yarn, the amino groups on the surface of the polyester fiber and the amino groups on the surface of the modified polyurethane react with toluene diisocyanate to graft isocyanate functional groups on the fiber surface, and then condense with isophorone diisocyanate to crosslink the two fibers through the carbodiimide structure. Carbodiimide has good hydrolysis resistance. During the hydrolysis of polyester materials, ester bonds are easily broken to generate carboxyl groups, and carbodiimide reacts with carboxyl groups to generate stable ureide structures, effectively eliminating carboxyl groups that are prone to cause self-catalytic hydrolysis of polyester materials, thereby inhibiting the molecular chain breakage and comprehensive physical property degradation caused by hydrolysis of the polymer. This reaction not only improves the hydrolysis resistance of the material, but also restores or partially restores the performance of the polymer material damaged by hydrolysis, extending its service life.

[0080] Test Example 3:

[0081] Antistatic performance test:

[0082] Test method: According to the standard GB / T12703-91, the antistatic performance of the fabric was tested at a humidity of 65%. The results are shown in Table 3.

[0083]

[0084] 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 moisture absorbing and perspiration-releasing polyester-ammonia blended antibacterial fabric prepared by the present invention has good antistatic properties.

[0085] By comparison, the average charge density of Examples 1 to 3 is less than that of Comparative Example 2, indicating that the polyurethane containing thiophene functional groups at both ends is prepared into fibers by a dry spinning process. In the presence of potassium persulfate, thiophene and 3-aminothiophene are polymerized on the fiber surface to form polythiophene, which gives the polyurethane good conductive properties.

[0086] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing a moisture wicking polyester-ammonia blended antibacterial fabric, characterized in that: The method comprises the following preparation steps: (1) reacting dichloromethylphosphonic acid and ethylene glycol to obtain a phosphorus-containing diol; reacting ethylene glycol, the phosphorus-containing diol and dimethyl terephthalate to obtain a phosphorus-containing polyester; (2) reacting phosphorus-containing polyester and dinitrobenzylpyridine to obtain pre-modified polyester; shearing and granulating the pre-modified polyester, spinning it through a melt spinning machine, and then drawing and heat treating it to prepare a pre-modified polyester fiber precursor; (3) reacting the pre-modified polyester fiber precursor with a sodium sulfide-sodium carbonate mixed solution to obtain a modified polyester fiber; (4) reacting thiophene-3-ol and polyurethane prepolymer to obtain modified polyurethane; The modified polyurethane is prepared into a spinning solution and then spun by a dry spinning process to obtain pre-modified polyurethane fibers; (5) reacting the pre-modified polyurethane fiber, hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate to obtain a modified polyurethane fiber; (6) blending the modified polyester fiber and the modified polyurethane fiber to obtain a blended yarn; mixing the blended yarn and toluene diisocyanate to obtain a pre-modified yarn; (7) The pre-modified yarn, isophorone diisocyanate, and 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide are reacted, and then dibutyltin dilaurate and N,N-dimethylethanolamine are reacted to obtain a modified yarn; the modified yarn is woven to obtain a moisture wicking polyester-ammonia blended antibacterial fabric.

2. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the phosphorus-containing polyester in step (1) is as follows: take chloromethylphosphonic acid dichloride and ethylene glycol in a molar ratio of 1:2, add chloromethylphosphonic acid dichloride to ethylene glycol at 0°C, heat to 40°C, react for 2.5 hours, and after the reaction, vacuum-evaporate the ethylene glycol at 110°C to obtain the phosphorus-containing diol; mix ethylene glycol, phosphorus-containing diol and dimethyl terephthalate in a molar ratio of 1:0.2:(2.5-2.7), add them to a reactor, add zinc acetate in an amount of 0.2% by weight of dimethyl terephthalate, evacuate to 0.1 KPa, after nitrogen purging, heat to 170-180°C, react for 3-4 hours, add antimony trioxide in an amount of 0.15% by weight of dimethyl terephthalate, heat to 230-240°C, react for 2-3 hours at 50 Pa, cool to room temperature and return to atmospheric pressure to obtain the phosphorus-containing polyester.

3. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the pre-modified polyester fiber precursor in step (2) is as follows: phosphorus-containing polyester, dinitrobenzylpyridine and N,N-dimethylformamide are mixed in a mass ratio of 1: (0.3-0.5): (20-30), the temperature is raised to 110°C for reaction for 6-8h, and after the reaction is completed, the pre-modified polyester is obtained by vacuum rotary evaporation; the pre-modified polyester is sheared and granulated, spun by a melt spinning machine, and then drawn and heat treated to prepare the pre-modified polyester fiber precursor; the spinning hole diameter of the melt spinning machine is 0.7mm, the spinning temperature is 210-240°C, the drawing multiple is 1.5 times, the heat treatment temperature is 80°C, and the linear density of the pre-modified polyester fiber precursor is 4.6tex.

4. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the modified polyester fiber in step (3) is as follows: a pre-modified polyester fiber precursor and a sodium sulfide-sodium carbonate mixed solution are mixed in a mass ratio of 1: (30-40), reacted at 98° C. for 40-50 min, and after the reaction is completed, washed with pure water and dried to obtain the modified polyester fiber; the sodium sulfide-sodium carbonate mixed solution is obtained by mixing sodium sulfide, sodium carbonate and pure water, and the concentration of sodium sulfide in the sodium sulfide-sodium carbonate mixed solution is 25 g / L, and the concentration of sodium carbonate is 20 g / L.

5. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the pre-modified polyurethane fiber in step (4) is as follows: thiophene-3-ol, polyurethane prepolymer and tetrahydrofuran are mixed in a mass ratio of (0.1-0.2): 1: (10-12), reacted at room temperature for 8-10 hours, and after the reaction is completed, vacuum distilled at -0.1 MPa and 45°C for 40 minutes to obtain modified polyurethane; the modified polyurethane and N,N-dimethylformamide are prepared into a spinning solution with a mass fraction of 15wt%, and the spinning solution is spun by a dry spinning process to obtain pre-modified polyurethane fiber; the polyurethane prepolymer model is E95C; the dry spinning process parameters are a temperature of 230°C and a spinning speed of 500m / min; the linear density of the pre-modified polyurethane fiber is 4tex.

6. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the modified polyurethane fiber in step (5) is as follows: pre-modified polyurethane fiber, 0.02 mol / L hydrochloric acid solution, thiophene, 3-aminothiophene, and potassium persulfate are mixed in a mass ratio of 1: (100-110): (10-15): (5-7): (3-4), reacted at 30-40°C for 6-8h, and after the reaction is completed, washed with pure water and vacuum dried at 40°C to obtain modified polyurethane fiber.

7. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the pre-modified yarn in step (6) is as follows: modified polyester fiber and modified polyurethane fiber are blended by siro spinning at a mass ratio of 40 / 60 to obtain a blended yarn; the blended yarn, toluene, dibutyltin dilaurate, and toluene diisocyanate are mixed at a mass ratio of 1: (20-30): 0.01: (5-6), the mixture is heated to 60° C. and reacted for 4-5 hours, the yarn is taken out after the reaction is completed, and vacuum dried at room temperature to obtain the pre-modified yarn.

8. The method for preparing the moisture wicking polyester / spandex blended antibacterial fabric according to claim 1, characterized in that: The preparation method of the moisture wicking polyester-ammonia blended antibacterial fabric in step (7) is as follows: pre-modified yarn, isophorone diisocyanate, 3-methyl-1-phenyl-2-phosphocyclopentene-1-oxide, and xylene are mixed in a mass ratio of 1: (2-3): (0.03-0.04): (20-30), the temperature is raised to 150-160° C. for reaction for 6-8 hours, the temperature is lowered to 80° C., 0.01 times the mass of the pre-modified yarn is added with dibutyltin dilaurate and 10-12 times the mass of the pre-modified yarn is added with N,N-dimethylethanolamine, the reaction is continued for 5-6 hours, and after the reaction is completed, the yarn is taken out, washed with pure water, and vacuum dried at room temperature to obtain the modified yarn; the modified yarn is weaved using a single-sided weft knitting circular machine to obtain a moisture wicking polyester-ammonia blended antibacterial fabric; the surface density of the moisture wicking polyester-ammonia blended antibacterial fabric is 100 g / m 2 .

9. A moisture wicking polyester / ammonia blended antibacterial fabric prepared according to the method for preparing a moisture wicking polyester / ammonia blended antibacterial fabric according to any one of claims 1 to 8.

10. Use of a moisture-wicking polyester-ammonia blended antibacterial fabric prepared according to the method for preparing a moisture-wicking polyester-ammonia blended antibacterial fabric according to any one of claims 1 to 8 in underwear.

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