Preparation method of structural responsive knitted fabric reinforced with modified nylon fiber

Abstract

The invention discloses a method for preparing a structure-responsive knitted fabric reinforced with modified nylon fibers, and belongs to the technical field of knitted fabric processing. The invention is used to solve the problems in the prior art that after absorbing sweat, the knitted fabric forms an obvious dry-wet color difference on the clothes, the anti-perspiration effect is poor, and the antibacterial property of the fabric needs to be further improved. The method for preparing a structure-responsive knitted fabric reinforced with modified nylon fibers comprises the following steps: blending the modified nylon fibers and spandex to prepare a structure-responsive yarn. The invention prepares a structure-responsive yarn with hygroscopic structure response and anatase titanium dioxide-loaded modified super-dull chemical fiber filament, optimizes the textile process, and not only effectively improves the hygroscopicity and drying rate of the structure-responsive knitted fabric, reduces the color difference value of the fabric after sweat infiltration, achieves an anti-perspiration effect, but also improves the antibacterial property of the fabric material.

Description

Technical Field

[0001] The invention relates to the technical field of knitted fabric processing, and in particular to a method for preparing a structure-responsive knitted fabric reinforced with modified nylon fibers. Background Art

[0002] With the improvement of people's living standards and the enhancement of health awareness, the functional requirements for clothing fabrics are also increasing. Especially in the hot summer, traditional fabrics tend to stick to the skin after sweating, causing stuffiness and airtightness, and even causing skin problems.

[0003] Structural response refers to the phenomenon that after a person sweats, the fabric absorbs sweat and shrinks and bulges, which reduces the contact area between the fabric and the skin, effectively achieving the goal of "not sticking to the body when in contact with water" and improving summer wearing comfort. Currently, most of the polyurethane materials printed on the market achieve this effect. The principle is that the third monomer copolymerized in the elastomer increases the hydrophilicity of the elastomer. After absorbing moisture, the water molecules squeeze the macromolecular chains to produce folds, thereby exhibiting macroscopic shrinkage characteristics.

[0004] At present, the fabrics with corresponding structures in the prior art are limited to the form of printing, and the polyurethane material has a poor touch against the skin and low human comfort. In addition, when the existing outdoor sportswear is worn for exercise, the sweat stains are absorbed by the fabric and form a very obvious dry and wet color difference on the clothes, causing embarrassment in public places. In addition, after the clothes are wetted by sweat stains, a large amount of sweat residues such as salt, urea, lactic acid, fatty acids, etc. are easily left on the clothes. These residues provide nutrients for bacteria to grow, especially in a warm and humid environment, bacteria are more likely to breed, and the antibacterial performance of existing clothes needs to be further improved, resulting in odor in the clothes after sweating during exercise.

[0005] In view of the technical defects in this aspect, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a method for preparing a structurally responsive knitted fabric reinforced with modified nylon fibers, so as to solve the technical problems in the prior art that the knitted fabric forms an obvious dry and wet color difference on the clothing after absorbing sweat, the anti-perspiration effect is poor, and the antibacterial performance of the fabric needs to be further improved.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] The method for preparing a structurally responsive knitted fabric reinforced with modified nylon fibers comprises the following steps:

[0009] S1. Blending modified nylon fiber and spandex to prepare structural responsive yarn, wherein the weight ratio of the modified nylon fiber to the spandex is 3-4:2;

[0010] S2. With structural response yarn and super dull chemical fiber filament as raw materials, 32G34" single-sided jacquard 6 needles / 14 modes are selected, among which 2-mode structural response yarn and 5-mode super dull chemical fiber filament are arranged at intervals to weave structural response knitted fabric.

[0011] Further, the preparation method of the modified nylon fiber is:

[0012] Pimelic acid, ethylene glycol and a catalyst are added to a nitrogen-protected reactor and stirred, the temperature of the reactor is raised to 220-240°C for heat preservation and reaction for 3-4 hours, polyamide is added to the reactor, the temperature of the reactor is raised to 240-260°C, the reactor is evacuated to 0.05-0.1MPa, the reaction is carried out for 60-80 minutes, and modified polyamide is obtained by post-treatment;

[0013] The reaction equations involved in the synthesis of modified polyamide include:

[0014]

[0015] Where:

[0016]

[0017] The reaction mechanisms involved in the synthesis of modified polyamides include:

[0018] Antimony glycol is used as the main catalyst and triphenyl phosphite is used as the co-catalyst. Under the action of the catalyst, the carboxyl group of pimelic acid and the hydroxyl group of ethylene glycol undergo esterification reaction. By controlling the excess of pimelic acid, carboxyl-terminated pimelic acid ethylene glycol is generated. Under higher temperature and vacuum conditions, the hydroxyl group on the polyamide molecular chain and the carboxyl group on the polyester chain undergo esterification grafting reaction to prepare modified polyamide.

[0019] The modified polyamide and modified zinc oxide are mixed and fed into a screw extruder, melted and extruded into a spinning machine through the screw extruder and ejected from a spinneret to obtain a crude modified nylon fiber, which is then heat-stretched to obtain the modified nylon fiber.

[0020] Furthermore, in the preparation process of the modified polyamide, the weight ratio of the pimelic acid, ethylene glycol, catalyst and polyamide is 14:5:0.5:9-11, the catalyst is composed of ethylene glycol antimony and triphenyl phosphite in a weight ratio of 3:1, and the post-treatment includes: after the reaction is completed, the polymer is extruded from the discharge hole at the bottom of the reactor by nitrogen, and granulated after cooling in a cold water tank, and the granulated particles are placed in a drying oven at a temperature of 70-80°C, and vacuum dried until the water content is less than 0.01%, to obtain to modified polyamide; in the preparation process of modified nylon fiber, the usage ratio of the modified polyamide and modified zinc oxide is 40:1, the temperatures of the 6 temperature sections of the screw extruder from the feed end to the discharge end are 280°C, 285°C, 285°C, 290°C, 290°C, and 295°C respectively, the spinning temperature of the spinning machine is 280-290°C, the aperture of the spinneret is 0.15-0.3mm, the hot stretching temperature is 120-140°C, and the stretching ratio is 3 times.

[0021] Further, the polyamide is processed by the following steps:

[0022] A1. Add glutaric acid and anhydrous ethanol into a reaction kettle and stir. Raise the temperature of the reaction kettle to 50-60° C., add 1,3-diamino-2-propanol into the reaction kettle, adjust the pH of the system to 7-8, and perform post-treatment to obtain glutaric acid salt;

[0023] The reactions involved in the synthesis of glutarate include:

[0024]

[0025] The reaction mechanisms involved in glutarate synthesis include:

[0026] With the addition of 1,3-diamino-2-propanol, the reaction system changes from acidic to alkaline, and the deprotonation of glutaric acid under alkaline conditions combines with the amino part of 1,3-diamino-2-propanol through ionic bonds to form a salt, forming glutarate.

[0027] A2, adding glutarate, caprolactam, deionized water and antioxidant into a reactor and stirring, raising the temperature of the reactor to 220-230°C, raising the pressure to 5-6MPa, maintaining the temperature and pressure for 6-8h, and post-treating to obtain a crude polyamide;

[0028] The reaction equations involved in the synthesis of crude polyamide include:

[0029]

[0030] The reaction mechanisms involved in the synthesis of crude polyamide include:

[0031] Under high temperature and high pressure conditions, caprolactam can undergo ring-opening polymerization at high temperature to generate polyamide 6 chain segments, and the carboxyl group of glutarate can react with the amino group on the polyamide chain or the amino group formed after the ring-opening of caprolactam, thereby further introducing the glutaric acid unit into the polyamide chain. The addition of antioxidant 1010 prevents the polyamide from oxidative degradation in the presence of high temperature and oxygen, thereby forming a high molecular weight polyamide crude product.

[0032] A3. Add the crude polyamide and deionized water into a reactor for ultrasonic treatment. Raise the temperature of the reactor to 80-90°C and keep the temperature for 20-24 hours. Post-treat to obtain polyamide.

[0033] Furthermore, in step A1, the amount ratio of glutaric acid to anhydrous ethanol is 1g:10mL, and the post-treatment includes: after the reaction is completed, the temperature of the reactor is lowered to room temperature, filtered, the filter cake is washed 3 times with anhydrous ethanol at a temperature of 50-60°C and then dried, the filter cake is transferred to a drying oven at a temperature of 50-60°C, and vacuum dried to constant weight to obtain glutaric acid salt; in step A2, the amount ratio of glutaric acid salt, caprolactam, deionized water and antioxidant is 5g:3g:6mL:0.2g, and the antioxidant The agent is antioxidant 1010, and the post-treatment includes: after the reaction is completed, gradually discharging water vapor to obtain a molten transparent melt, discharging under the action of nitrogen, slicing the cast strip, and crushing to obtain a crude polyamide product; in step A3, the amount ratio of the crude polyamide to deionized water is 1g:4-5mL, and the post-treatment includes: after the reaction is completed, lowering the temperature of the reactor to room temperature, filtering, washing the filter cake with purified water for 3 times and then drying it, transferring the filter cake to a drying oven at a temperature of 80-90°C, and vacuum drying it to constant weight to obtain polyamide.

[0034] Furthermore, the preparation method of modified zinc oxide is: adding nano zinc oxide, anhydrous ethanol and KH-560 to a reactor, ultrasonically dispersing for 30-50 minutes, raising the temperature of the reactor to 45-55°C, adding sodium hydroxide solution to the reactor, keeping the reaction temperature for 2-3 hours, and post-treating to obtain modified zinc oxide.

[0035] The reaction equations involved in the synthesis of modified zinc oxide include:

[0036]

[0037] In the formula is zinc oxide particles;

[0038] The reaction mechanisms involved in the synthesis of modified zinc oxide include:

[0039] Under alkaline conditions, the silane groups in KH-560 are hydrolyzed to form silanols, which can undergo condensation reactions with the active groups on the surface of nano-zinc oxide, grafting KH-560 onto the surface of nano-zinc oxide to prepare modified zinc oxide.

[0040] Furthermore, the dosage ratio of the nano zinc oxide, anhydrous ethanol, KH-560 and sodium hydroxide solution is 5g:30mL:2g:8mL, the concentration of the sodium hydroxide solution is 0.8-1.5mol / L, the particle size of the nano zinc oxide is 30-40nm, and the post-treatment includes: after the reaction is completed, the temperature of the reactor is lowered to room temperature, suction filtration is performed, the filter cake is washed with purified water until it is neutral and then washed twice with anhydrous ethanol, the filter cake is transferred to a drying oven at a temperature of 60-70°C, and vacuum dried to constant weight to obtain modified zinc oxide.

[0041] Further, the super matte chemical fiber filament is processed by the following steps:

[0042] B1, pretreating the polyester fiber to obtain pretreated polyester fiber;

[0043] B2, performing loading treatment on the pretreated polyester fiber to obtain a modified polyester fiber having a titanium dioxide content of 3-5%;

[0044] B4. Feed the modified polyester fiber into a spinning machine for spinning to obtain super matte chemical fiber filaments.

[0045] Furthermore, the pretreatment method in step B1 includes the following steps:

[0046] C1. Add polyester fiber and activation solution into a reactor, raise the temperature of the reactor to 50-60°C, perform ultrasonic dispersion for 40-50 minutes, and perform post-treatment to obtain activated fiber;

[0047] C2. Add activated fiber, purified water and OP-10 into a reactor, soak at room temperature for 25-35 minutes, and post-treat to obtain pretreated polyester fiber.

[0048] The mechanisms involved in the preparation of pretreated polyester fibers include:

[0049] Under the action of ultrasonic dispersion, the sodium hydroxide, sodium dodecyl sulfate and ethanol in the activation solution can contact and act on the fiber surface more fully. In an alkaline environment, the cavitation effect and microjet effect produced by ultrasonic dispersion help to destroy the microstructure of the fiber surface, increase its specific surface area and roughness, and OP-10 can be adsorbed on the fiber surface to form a stable hydrophilic film on the outside of the activated fiber, making the fiber surface more uniform and smooth.

[0050] Furthermore, in step C1, the amount ratio of the polyester fiber and the activation solution is 1g:20mL, and the activation solution is composed of sodium hydroxide, sodium dodecyl sulfate and 90vol% ethanol aqueous solution in the amount ratio of 5g:1g:40mL. The post-treatment includes: after the reaction is completed, the temperature of the reactor is lowered to room temperature, the filter cake is filtered, the filter cake is washed with purified water for 3 times and then dried, the filter cake is transferred to a drying oven at a temperature of 70-80°C, and vacuum dried to constant weight to obtain activated fiber; in step C2, the amount ratio of the activated fiber, purified water and OP-10 is 5g:50mL:2g, and the post-treatment includes: after the reaction is completed, the filter cake is filtered, the filter cake is washed with purified water for 3 times and then dried, the filter cake is transferred to a drying oven at a temperature of 70-80°C, and vacuum dried to constant weight to obtain pretreated polyester fiber.

[0051] Furthermore, the load processing in step B2 includes the following steps:

[0052] D1. Add nano-titanium dioxide, sodium nitrate and deionized water into a reactor, and perform ultrasonic dispersion for 40-60 minutes at room temperature to obtain a titanium dioxide dispersion;

[0053] D2, adding the pretreated polyester fiber and the titanium dioxide dispersion into the reactor, raising the temperature of the reactor to 85-95°C, impregnating for 5-10 minutes, treating the impregnated polyester fiber with a padder to remove excess water, and then transferring the fiber to an oven at a temperature of 90-100°C, drying for 20-30 minutes, and obtaining a modified polyester fiber precursor;

[0054] D3. Repeat the operation of step D2 until the titanium dioxide content on the polyester fiber reaches 3-5%, and dry to constant weight to obtain modified polyester fiber.

[0055] The reaction mechanisms involved in the preparation of modified polyester fibers include:

[0056] Anatase nano-titanium dioxide and sodium nitrate are treated by ultrasonic dispersion in deionized water. The cavitation effect and microjet effect generated by ultrasound are helpful to break the agglomeration between nano-particles, so that TiO2 particles are evenly dispersed in water to form a stable titanium dioxide dispersion. The surface of the polyester fiber has good hydrophilicity and wettability after pretreatment, so that the TiO2 particles in the dispersion can be more easily adsorbed to the fiber surface. The impregnated polyester fiber is treated by a padder, and excess water and unfirmly adsorbed TiO2 particles are removed by mechanical pressure. By repeated operations, the loading amount of titanium dioxide on the polyester fiber is increased to prepare modified polyester fiber.

[0057] Furthermore, in step D1, the dosage ratio of the nano-titanium dioxide, sodium nitrate and deionized water is 2g:1g:50mL, and the nano-titanium dioxide is anatase nano-titanium dioxide; in step D2, the dosage ratio of the pretreated polyester fiber and the titanium dioxide dispersion is 1g:5mL, and the liquid squeezing rate of the squeezing treatment is 80-85%.

[0058] The present invention has the following beneficial effects:

[0059] 1. The modified nylon fiber reinforced structural responsive knitted fabric of the present application is prepared by preparing a soft modified nylon fiber with high hygroscopicity, blending it with spandex to prepare a hygroscopic structural responsive yarn, and then taking polyester fiber as the basis, modifying it by loading anatase titanium dioxide to prepare the modified polyester fiber, spinning it to prepare super-dull chemical fiber filaments, and using the structural responsive yarn and the super-dull chemical fiber filaments as raw materials, optimizing the textile process, constructing a jacquard hexagonal design, and when the fabric absorbs moisture, the hexagonal side length of the 2-mode yarn expands and contracts, driving the fabric to arch, reducing the contact between the fabric and the skin The contact surface realizes the intelligent response of the fabric to the human body's humidity. It can sense deformation and reduce the contact between the fabric and the skin when it is soaked with sweat, relieve the discomfort of the contact between the fabric and the skin after sweating during exercise, and at the same time guide the diffusion of sweat to accelerate evaporation, thereby improving the comfort of the wearing experience. The 5-mode yarn is a hexagonal internal area with a large area, which can guide the diffusion of sweat. The structural changes of the super-dull yarn and the fabric after absorbing water can prevent the obvious mirror reflection of sweat, reduce the NBS unit color difference value of the reflected light hue of the fabric when sweat stains are soaked and dried, making it relatively difficult for the human eye to detect, thereby achieving an anti-sweat effect.

[0060] 2. The modified nylon fiber reinforced structural responsive knitted fabric of the present application is prepared by amidation reaction of glutarate and caprolactam under high temperature and high pressure environment, glutaric acid units are introduced into polyamide segments in the form of amide bonds, and hydroxyl groups are introduced into the polyamide segments; the nitrogen atoms and carbonyl oxygen atoms in the amide bonds of the polyamide molecules can form hydrogen bonds with water molecules, so that the polyamide has good water absorption, and by controlling the reaction amount ratio, the esterification product of pimelic acid and ethylene glycol can undergo esterification condensation with the hydroxyl groups on the polyamide molecules to prepare modified polyamide. Ethylene glycol is a diol, and its molecule contains two hydroxyl groups, and the carbon chain between the hydroxyl groups is relatively short, which makes ethylene glycol itself have good flexibility. In the esterification reaction, the two carboxyl groups of pimelic acid It is respectively combined with two hydroxyl groups of ethylene glycol to form two ester bonds. This structure helps to maintain the flexibility of the molecular chain and the property difference between polyester and polyamide, destroys the original crystal structure of polyamide, and reduces the crystallinity of the modified polyamide. The epoxy group on the modified zinc oxide can undergo ring-opening condensation with the active groups on the modified polyamide molecules under high temperature environment, and introduces hydroxyl groups into the modified polyamide molecular chain. Moreover, the addition of modified zinc oxide can further reduce the crystallinity of the modified nylon fiber, so that the modified nylon fiber exhibits good hydrophilic and soft properties, thereby making the modified nylon fiber easier to stretch after moisture absorption, exhibiting good stretchability. After mixing it with spandex, structural responsive yarn is prepared, so that the knitted fabric exhibits good structural responsiveness.

[0061] 3. The modified nylon fiber reinforced structure-responsive knitted fabric of the present application, the polyester fiber is treated with an activation liquid, which increases the hydrophilicity and roughness of the polyester fiber surface, which is conducive to loading rutile titanium dioxide onto the polyester fiber. Rutile titanium dioxide has good photocatalytic properties and hydrophilicity, can accelerate the evaporation of water on the fiber surface, so that the fabric can dry quickly. Rutile titanium dioxide can generate photogenerated electrons and holes under light conditions to react with oxygen in water or air to generate free radicals with strong oxidizing properties, destroy bacterial cell walls and cell membranes, thereby killing bacteria. In addition, rutile titanium dioxide can also decompose toxins and odor substances produced by bacteria through photocatalytic reactions; the zinc oxide loaded in the structure-responsive yarn itself has a broad-spectrum antibacterial property. In the structure-responsive knitted fabric, rutile titanium dioxide can continuously kill bacteria under light conditions, and zinc oxide inhibits the growth and reproduction of bacteria by releasing zinc ions and directly interacting with bacterial cell membranes. The structure-responsive yarn cooperates with the super-dull chemical fiber filament to improve the antibacterial property of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0063] Figure 1 This is a knitting process diagram of the structural responsive knitted fabric of the present invention;

[0064] Figure 2 The present invention provides a knitting process table for the structural responsive knitted fabric. DETAILED DESCRIPTION

[0065] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0066] Example 1

[0067] This embodiment provides a method for preparing a structurally responsive yarn for a structurally responsive knitted fabric reinforced with modified nylon fibers, comprising the following steps:

[0068] A1. Preparation of modified zinc oxide

[0069] Weigh: 50g of nano zinc oxide, 300mL of anhydrous ethanol and 20g of KH-560, add them into a reactor, ultrasonically disperse for 30min, raise the temperature of the reactor to 45°C, add 80mL of 0.8mol / L sodium hydroxide solution into the reactor, keep warm for 2h, lower the temperature of the reactor to room temperature, filter, wash the filter cake with purified water until neutral, wash it twice with anhydrous ethanol and then dry it, transfer the filter cake to a drying oven at 60°C, and vacuum dry it to constant weight to obtain modified zinc oxide.

[0070] A2. Preparation of polyamide

[0071] Weigh: 100 g of glutaric acid and 1000 mL of anhydrous ethanol are added to a reactor and stirred. The temperature of the reactor is raised to 50°C. 1,3-diamino-2-propanol is added to the reactor to adjust the pH of the system to 7. Stir for 20 minutes. Re-measure the pH. The temperature of the reactor is lowered to room temperature. Filter by suction. Wash the filter cake with anhydrous ethanol at a temperature of 50°C for 3 times and then dry it. Transfer the filter cake to a drying oven at a temperature of 50°C and vacuum dry it to constant weight to obtain glutaric acid salt;

[0072] Weigh: 100 g of glutarate, 60 g of caprolactam, 120 mL of deionized water and 4 g of antioxidant 1010, add into a reactor and stir, raise the temperature of the reactor to 220° C., raise the pressure to 5 MPa, keep the temperature and pressure to react for 6 hours, gradually discharge water vapor to obtain a molten transparent melt, discharge under nitrogen, slice the cast strip, and crush to obtain a crude polyamide;

[0073] The crude polyamide and deionized water were added into the reactor in a ratio of 1g:4mL and ultrasonicated. The temperature of the reactor was raised to 80°C and kept warm for 20h. The temperature of the reactor was lowered to room temperature and filtered. The filter cake was washed with purified water for 3 times and then dried. The filter cake was transferred to a drying oven at 80°C and vacuum dried to constant weight to obtain polyamide.

[0074] A3. Preparation of modified polyamide

[0075] Ethylene glycol antimony and triphenyl phosphite are mixed uniformly in a weight ratio of 3:1 to obtain a catalyst for later use;

[0076] Weigh: 140g of pimelic acid, 50g of ethylene glycol, and 5g of catalyst, add them into a nitrogen-protected reactor and stir, raise the temperature of the reactor to 220°C and keep the reaction for 3h, add 90g of polyamide into the reactor, raise the temperature of the reactor to 240°C, evacuate the reactor to 0.05MPa, react for 60min, extrude the polymer from the discharge hole at the bottom of the reactor by nitrogen, cool it in a cold water tank and granulate it, place the granulated particles in a drying oven at 70°C, and vacuum dry them to a water content of less than 0.01% to obtain modified polyamide.

[0077] A4. Preparation of modified nylon fiber

[0078] The modified polyamide and the modified zinc oxide are mixed in a weight ratio of 40:1 and then fed into a screw extruder, wherein the temperatures of the six temperature sections of the screw extruder from the feed end to the discharge end are 280° C., 285° C., 285° C., 290° C., 290° C., and 295° C., and the mixed polyamide and the modified zinc oxide are melt-extruded into a spinning machine with a spinning temperature of 280° C. and a spinneret aperture of 0.15 mm, and then ejected from the spinneret to obtain a crude modified nylon fiber;

[0079] The modified nylon fiber crude product was kept at a temperature of 120° C. for 3 minutes, and was heat-stretched at a stretching ratio of 3 times to obtain the modified nylon fiber.

[0080] A5. Preparation of structurally responsive yarn

[0081] The modified nylon fiber and spandex were added into a spinning machine at a weight ratio of 3:2 for blending to prepare structural responsive yarn.

[0082] Example 2

[0083] This embodiment provides a method for preparing a structurally responsive yarn for a structurally responsive knitted fabric reinforced with modified nylon fibers, comprising the following steps:

[0084] A1. Preparation of modified zinc oxide

[0085] Weigh: 50g of nano zinc oxide, 300mL of anhydrous ethanol and 20g of KH-560, add them into a reactor, ultrasonically disperse for 40min, raise the temperature of the reactor to 50°C, add 80mL of 1.1mol / L sodium hydroxide solution into the reactor, keep warm for 2.5h, lower the temperature of the reactor to room temperature, filter, wash the filter cake with purified water until neutral, wash it twice with anhydrous ethanol and then dry it, transfer the filter cake to a drying oven at 65°C, and vacuum dry it to constant weight to obtain modified zinc oxide.

[0086] A2. Preparation of polyamide

[0087] Weigh: 100 g of glutaric acid and 1000 mL of anhydrous ethanol are added to a reactor and stirred. The temperature of the reactor is raised to 55°C. 1,3-diamino-2-propanol is added to the reactor to adjust the pH of the system to 7.5. Stir for 25 minutes, re-measure the pH, lower the temperature of the reactor to room temperature, filter, wash the filter cake with anhydrous ethanol at a temperature of 55°C for 3 times and then dry it. Transfer the filter cake to a drying oven at a temperature of 55°C and vacuum dry it to constant weight to obtain glutaric acid salt;

[0088] Weigh: 100 g of glutarate, 60 g of caprolactam, 120 mL of deionized water and 4 g of antioxidant 1010, add into a reactor and stir, raise the temperature of the reactor to 225° C., raise the pressure to 5.5 MPa, keep the temperature and pressure to react for 7 hours, gradually discharge water vapor to obtain a molten transparent melt, discharge under nitrogen, slice the cast strip, and crush to obtain a crude polyamide;

[0089] The crude polyamide and deionized water were added into the reactor in the amount ratio of 1g:4.5mL and ultrasonicated. The temperature of the reactor was raised to 85°C and kept warm for 22h. The temperature of the reactor was lowered to room temperature and filtered. The filter cake was washed with purified water for 3 times and then dried. The filter cake was transferred to a drying oven at 85°C and vacuum dried to constant weight to obtain polyamide.

[0090] A3. Preparation of modified polyamide

[0091] Ethylene glycol antimony and triphenyl phosphite are mixed uniformly in a weight ratio of 3:1 to obtain a catalyst for later use;

[0092] Weigh: 140g of pimelic acid, 50g of ethylene glycol, and 5g of catalyst, add them into a nitrogen-protected reactor and stir, raise the temperature of the reactor to 230°C and keep the reaction for 3.5h, add 95g of polyamide into the reactor, raise the temperature of the reactor to 250°C, evacuate the reactor to 0.07MPa, react for 70min, extrude the polymer from the discharge hole at the bottom of the reactor by nitrogen, cool it in a cold water tank and granulate it, place the granulated particles in a drying oven at a temperature of 75°C, and vacuum dry them to a water content of less than 0.01% to obtain modified polyamide.

[0093] A4. Preparation of modified nylon fiber

[0094] The modified polyamide and the modified zinc oxide are mixed in a weight ratio of 40:1 and then fed into a screw extruder, wherein the temperatures of the six temperature sections of the screw extruder from the feed end to the discharge end are 280° C., 285° C., 285° C., 290° C., 290° C., and 295° C., and the mixed polyamide and the modified zinc oxide are melt-extruded into a spinning machine with a spinning temperature of 285° C. and a spinneret aperture of 0.2 mm, and then ejected from the spinneret to obtain a crude modified nylon fiber;

[0095] The modified nylon fiber crude product was kept at a temperature of 130° C. for 4 minutes, and was heat-stretched at a stretching ratio of 3 times to obtain the modified nylon fiber.

[0096] A5. Preparation of structurally responsive yarn

[0097] The modified nylon fiber and spandex were added into a spinning machine at a weight ratio of 7:4 for blending to prepare structural responsive yarn.

[0098] Example 3

[0099] This embodiment provides a method for preparing a structurally responsive yarn for a structurally responsive knitted fabric reinforced with modified nylon fibers, comprising the following steps:

[0100] A1. Preparation of modified zinc oxide

[0101] Weigh: 50g of nano zinc oxide, 300mL of anhydrous ethanol and 20g of KH-560, add them into a reactor, ultrasonically disperse for 50min, raise the temperature of the reactor to 55°C, add 80mL of 1.5mol / L sodium hydroxide solution into the reactor, keep warm for 3h, lower the temperature of the reactor to room temperature, filter, wash the filter cake with purified water until neutral, wash it twice with anhydrous ethanol and then dry it, transfer the filter cake to a drying oven at 70°C, and vacuum dry it to constant weight to obtain modified zinc oxide.

[0102] A2. Preparation of polyamide

[0103] Weigh: 100 g of glutaric acid and 1000 mL of anhydrous ethanol are added to a reactor and stirred. The temperature of the reactor is raised to 60°C. 1,3-diamino-2-propanol is added to the reactor to adjust the pH of the system to 8. Stir for 30 minutes, re-measure the pH, lower the temperature of the reactor to room temperature, filter, wash the filter cake with anhydrous ethanol at a temperature of 50-60°C for 3 times and then dry it. Transfer the filter cake to a drying oven at a temperature of 60°C and vacuum dry it to constant weight to obtain glutaric acid salt;

[0104] Weigh: 100 g of glutarate, 60 g of caprolactam, 120 mL of deionized water and 4 g of antioxidant 1010, add into a reactor and stir, raise the temperature of the reactor to 230° C., raise the pressure to 6 MPa, keep the temperature and pressure to react for 8 hours, gradually discharge water vapor to obtain a molten transparent melt, discharge under nitrogen, slice the cast strip, and crush to obtain a crude polyamide;

[0105] The crude polyamide and deionized water were added into the reactor in a ratio of 1g:5mL and ultrasonicated. The temperature of the reactor was raised to 90°C and kept warm for 24h. The temperature of the reactor was lowered to room temperature and filtered. The filter cake was washed with purified water for 3 times and then dried. The filter cake was transferred to a drying oven at 90°C and vacuum dried to constant weight to obtain polyamide.

[0106] A3. Preparation of modified polyamide

[0107] Ethylene glycol antimony and triphenyl phosphite are mixed uniformly in a weight ratio of 3:1 to obtain a catalyst for later use;

[0108] Weigh: 140g of pimelic acid, 50g of ethylene glycol, and 5g of catalyst, add them into a nitrogen-protected reactor and stir, raise the temperature of the reactor to 240°C and keep the reaction for 4h, add 100g of polyamide into the reactor, raise the temperature of the reactor to 260°C, evacuate the reactor to 0.1MPa, react for 80min, extrude the polymer from the discharge hole at the bottom of the reactor by nitrogen, cool it in a cold water tank and granulate it, place the granulated particles in a drying oven at 80°C, and vacuum dry them to a water content of less than 0.01% to obtain modified polyamide.

[0109] A4. Preparation of modified nylon fiber

[0110] The modified polyamide and the modified zinc oxide are mixed in a weight ratio of 40:1 and then fed into a screw extruder, wherein the temperatures of the six temperature sections of the screw extruder from the feed end to the discharge end are 280° C., 285° C., 285° C., 290° C., 290° C., and 295° C., and the mixed polyamide and the modified zinc oxide are melt-extruded into a spinning machine with a spinning temperature of 290° C. and a spinneret aperture of 0.3 mm, and then ejected from the spinneret to obtain a crude modified nylon fiber;

[0111] The modified nylon fiber crude product was kept at a temperature of 140° C. for 5 minutes, and was heat-stretched at a stretching ratio of 3 times to obtain the modified nylon fiber.

[0112] A5. Preparation of structurally responsive yarn

[0113] The modified nylon fiber and spandex were added into a spinning machine at a weight ratio of 4:2 for blending to prepare structural responsive yarn.

[0114] Example 4

[0115] This embodiment provides a method for preparing super-dull chemical fiber filaments for structurally responsive knitted fabrics reinforced with modified nylon fibers, comprising the following steps:

[0116] B1. Polyester fiber pretreatment

[0117] Sodium hydroxide, sodium dodecyl sulfate and 90 vol% ethanol aqueous solution were mixed in a dosage ratio of 5 g:1 g:40 mL to obtain an activation solution for later use;

[0118] Weigh: 50 g of polyester fiber and 1000 mL of activation solution and add them into a reactor. The temperature of the reactor is raised to 50°C. Ultrasonic dispersion is performed for 40 minutes. The temperature of the reactor is lowered to room temperature. Filter by suction. Wash the filter cake with purified water for 3 times and then drain it. Transfer the filter cake to a drying oven at 70°C and vacuum dry it to constant weight to obtain activated fiber.

[0119] The activated fiber, purified water and OP-10 were added into the reactor in the amount ratio of 5g:50mL:2g, soaked at room temperature for 25min, filtered, the filter cake was washed with purified water for 3 times and then dried, the filter cake was transferred to a drying oven at a temperature of 70°C, and vacuum dried to constant weight to obtain pretreated polyester fiber.

[0120] B2. Titanium dioxide loading modification

[0121] Weigh: 40 g of anatase nano-titanium dioxide, 20 g of sodium nitrate, and 1000 mL of deionized water, add them into a reactor, and perform ultrasonic dispersion for 40 min at room temperature to obtain a titanium dioxide dispersion;

[0122] The pretreated polyester fiber and the titanium dioxide dispersion were added into the reactor at a dosage ratio of 1 g:5 mL, the temperature of the reactor was raised to 85°C, and the mixture was immersed for 5 minutes. The immersed polyester fiber was treated by a padder, and excess water was removed at a liquid injection rate of 80%. The fiber was then transferred to an oven at a temperature of 90°C and dried for 20 minutes to obtain a modified polyester fiber precursor.

[0123] Repeat the above-mentioned operation of pretreating the polyester fiber to prepare the modified polyester fiber precursor until the titanium dioxide content on the polyester fiber reaches 3%, dry it to a constant weight, and obtain the modified polyester fiber.

[0124] B3. Preparation of super matte chemical fiber filaments

[0125] The modified polyester fiber is fed into a spinning machine and spun to obtain super-dull chemical fiber filaments.

[0126] Example 5

[0127] This embodiment provides a method for preparing super-dull chemical fiber filaments for structurally responsive knitted fabrics reinforced with modified nylon fibers, comprising the following steps:

[0128] B1. Polyester fiber pretreatment

[0129] Sodium hydroxide, sodium dodecyl sulfate and 90 vol% ethanol aqueous solution were mixed in a dosage ratio of 5 g:1 g:40 mL to obtain an activation solution for later use;

[0130] Weigh: 50 g of polyester fiber and 1000 mL of activation solution and add them into a reactor. The temperature of the reactor is raised to 55°C. Ultrasonic dispersion is performed for 45 minutes. The temperature of the reactor is lowered to room temperature. Filter by suction. Wash the filter cake with purified water for 3 times and then drain it. Transfer the filter cake to a drying oven at 75°C and vacuum dry it to constant weight to obtain activated fiber.

[0131] The activated fiber, purified water and OP-10 were added into the reactor in the amount ratio of 5g:50mL:2g, soaked at room temperature for 30min, filtered, the filter cake was washed with purified water for 3 times and then dried, the filter cake was transferred to a drying oven at a temperature of 75°C, and vacuum dried to constant weight to obtain pretreated polyester fiber.

[0132] B2. Titanium dioxide loading modification

[0133] Weigh: 40 g of anatase nano-titanium dioxide, 20 g of sodium nitrate, and 1000 mL of deionized water, add them into a reactor, and perform ultrasonic dispersion for 50 min at room temperature to obtain a titanium dioxide dispersion;

[0134] The pretreated polyester fiber and titanium dioxide dispersion were added into the reactor at a dosage ratio of 1g:5mL, the temperature of the reactor was raised to 90°C, and the mixture was immersed for 7 minutes. The immersed polyester fiber was treated by a padder, and excess water was removed at a liquid injection rate of 83%. The fiber was then transferred to an oven at a temperature of 95°C and dried for 25 minutes to obtain a modified polyester fiber precursor.

[0135] Repeat the above-mentioned operation of pretreating the polyester fiber to prepare the modified polyester fiber precursor until the titanium dioxide content on the polyester fiber reaches 4%, dry it to a constant weight, and obtain the modified polyester fiber.

[0136] B3. Preparation of super matte chemical fiber filaments

[0137] The modified polyester fiber is fed into a spinning machine and spun to obtain super-dull chemical fiber filaments.

[0138] Example 6

[0139] This embodiment provides a method for preparing super-dull chemical fiber filaments for structurally responsive knitted fabrics reinforced with modified nylon fibers, comprising the following steps:

[0140] B1. Polyester fiber pretreatment

[0141] Sodium hydroxide, sodium dodecyl sulfate and 90 vol% ethanol aqueous solution were mixed in a dosage ratio of 5 g:1 g:40 mL to obtain an activation solution for later use;

[0142] Weigh: 50 g of polyester fiber and 1000 mL of activation solution and add them into a reactor. Raise the temperature of the reactor to 60°C, perform ultrasonic dispersion for 50 minutes, lower the temperature of the reactor to room temperature, filter, wash the filter cake with purified water for 3 times and then drain, transfer the filter cake to a drying oven at 80°C, and vacuum dry to constant weight to obtain activated fiber;

[0143] The activated fiber, purified water and OP-10 were added into the reactor in the amount ratio of 5g:50mL:2g, soaked at room temperature for 35min, filtered, the filter cake was washed with purified water for 3 times and then dried, the filter cake was transferred to a drying oven at 80°C, and vacuum dried to constant weight to obtain pretreated polyester fiber.

[0144] B2. Titanium dioxide loading modification

[0145] Weigh: 40 g of anatase nano-titanium dioxide, 20 g of sodium nitrate, and 1000 mL of deionized water, add them into a reactor, and perform ultrasonic dispersion for 60 min at room temperature to obtain a titanium dioxide dispersion;

[0146] The pretreated polyester fiber and the titanium dioxide dispersion were added into the reactor at a dosage ratio of 1 g: 5 mL, the temperature of the reactor was raised to 95° C., and the mixture was immersed for 10 minutes. The immersed polyester fiber was treated by a padder, and excess water was removed at a liquid injection rate of 85%. The fiber was then transferred to an oven at a temperature of 100° C. and dried for 30 minutes to obtain a modified polyester fiber precursor.

[0147] Repeat the above-mentioned operation of pretreating the polyester fiber to prepare the modified polyester fiber precursor until the titanium dioxide content on the polyester fiber reaches 5%, dry it to a constant weight, and obtain the modified polyester fiber.

[0148] B3. Preparation of super matte chemical fiber filaments

[0149] The modified polyester fiber is fed into a spinning machine and spun to obtain super-dull chemical fiber filaments.

[0150] Example 7

[0151] This embodiment provides a method for preparing a modified nylon fiber reinforced structure-responsive knitted fabric, comprising the following steps:

[0152] S1, using the structure-responsive yarn prepared in Example 1 and the super-dull chemical fiber filament prepared in Example 4 as raw materials, adding them into a textile machine;

[0153] S2. Select 32G34" single-sided jacquard 6 needles / 14 modes, and arrange the 2-mode structural response yarn and 5-mode super dull chemical fiber filaments at intervals. Among the 14-mode structural yarns, 1-2-mode structural response yarns are spun in an AAA tuck mode, 3-7-mode super dull chemical fiber filaments are spun in an ABA tuck mode, 8-9-mode structural response yarns are spun in an AAA tuck mode, and 10-14-mode super dull chemical fiber filaments are spun in an AAB tuck mode to obtain a structural responsive knitted fabric.

[0154] Example 8

[0155] The difference between this embodiment and embodiment 7 is that this embodiment uses the structural responsive yarn prepared in embodiment 2 and the super matte chemical fiber filament prepared in embodiment 5 as raw materials.

[0156] Example 9

[0157] The difference between this embodiment and embodiment 7 is that this embodiment uses the structural responsive yarn prepared in embodiment 3 and the super matte chemical fiber filament prepared in embodiment 6 as raw materials.

[0158] Comparative Example 1

[0159] The difference between this comparative example and Example 7 is that the structural responsive yarn used is that step A1 is omitted during preparation, and modified zinc oxide is not added in step A4.

[0160] Comparative Example 2

[0161] The difference between this comparative example and Example 7 is that, when preparing the structural responsive yarn used, step A3 is omitted, and the modified polyamide in step A4 is replaced by the polyamide in step A2.

[0162] Comparative Example 3

[0163] The difference between this comparative example and Example 7 is that, during the preparation of the super-dull chemical fiber filaments used, the activated fibers in step B1 replace the pre-treated polyester fibers in step B2.

[0164] Comparative Example 4

[0165] The difference between this comparative example and Example 7 is that, in the preparation of the super matt chemical fiber filaments used, rutile nano-titanium dioxide is used to replace the anatase nano-titanium dioxide in step B2.

[0166] Comparative Example 5

[0167] The difference between this comparative example and Example 7 is that in step S2, 32G34" single-sided jacquard 6 needles / 14 modes are selected, and 2-mode structural response yarns are arranged at intervals according to the 2-mode structural yarns. Among the 14-mode structural yarns, 1-2 mode, 5-6 mode, 9-10 mode, and 13-14 mode structural response yarns are woven in an ABA tuck manner, and 3-4 mode, 7-8 mode, and 11-12 mode super dull chemical fiber filaments are woven in an ABA tuck manner to obtain a structural responsive knitted fabric.

[0168] Performance Test:

[0169] The antibacterial rates of Staphylococcus aureus and Candida albicans of the structure-responsive knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were tested with reference to the standard GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method";

[0170] The water absorption and drying rate of the structurally responsive knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were tested with reference to the standard GB / T 21655.1-2023 “Evaluation of moisture absorption and quick-drying properties of textiles Part 1: Single combination test method”;

[0171] The NBS unit color difference value of the color tone of the reflected light of the structure-responsive knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-5 when they were soaked in sweat and dried was tested with reference to the standard GB / T 8424.3-2001 "Calculation of color difference in color fastness tests for textiles";

[0172] The specific test structure is shown in Table 1 below:

[0173] Table 1-Performance test data of the sample

[0174]

[0175] Data Analysis:

[0176] A comparative analysis of the data in Table 1 above shows that the water absorption rate of the structurally responsive knitted fabric prepared by the present invention reaches 156.8%, the drying rate reaches 0.53 g / h, the color difference value is reduced to 0.46, the antibacterial rate against Staphylococcus aureus reaches 99.99%, and the antibacterial rate against Candida albicans reaches 99.98%. All the test data are better than those of the comparative example, indicating that the present invention prepares soft modified nylon fiber with high hygroscopicity, blends it with spandex to prepare hygroscopic structural responsive yarn, and then prepares super-dull chemical fiber filament based on polyester fiber through rutile titanium dioxide loading modification, optimizes the textile process, and effectively improves the hygroscopicity and drying rate of the structurally responsive knitted fabric, reduces the color difference value of the fabric after sweat infiltration, achieves the anti-sweat effect, and also improves the antibacterial property of the fabric material.

[0177] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0178] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0179] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for preparing a structurally responsive knitted fabric reinforced with modified nylon fibers, characterized in that: The following steps are involved: S1. Blending modified nylon fiber and spandex to prepare structural responsive yarn, wherein the weight ratio of the modified nylon fiber to the spandex is 3-4:2; S2, using structural response yarn and super dull chemical fiber filament as raw materials, selecting 32G34" single-sided jacquard 6 needles / 14 modes, wherein 2-mode structural response yarn and 5-mode super dull chemical fiber filament are arranged at intervals, and weaving to obtain structural response knitted fabric; The preparation method of modified nylon fiber is as follows: Adding pimelic acid, ethylene glycol and a catalyst into a nitrogen-protected reactor and stirring, raising the temperature of the reactor to 220-240°C and keeping the temperature for reaction for 3-4 hours, adding polyamide into the reactor, raising the temperature of the reactor to 240-260°C, evacuating the reactor to 0.05-0.1MPa, reacting for 60-80 minutes, and post-treating to obtain modified polyamide; mixing the modified polyamide and modified zinc oxide and feeding them into a screw extruder, and extruding them into a spinning machine through the screw extruder to be melted and ejected from a spinneret to obtain a crude modified nylon fiber, and heat-stretching to obtain a modified nylon fiber; In the preparation process of modified polyamide, the weight ratio of pimelic acid, ethylene glycol, catalyst and polyamide is 14:5:0.5:9-11, and the catalyst is composed of ethylene glycol antimony and triphenyl phosphite in a weight ratio of 3:1; in the preparation process of modified nylon fiber, the dosage ratio of modified polyamide and modified zinc oxide is 40:1, the temperatures of the six temperature sections of the screw extruder from the feed end to the discharge end are 280°C, 285°C, 285°C, 290°C, 290°C, and 295°C, respectively, the spinning temperature of the spinning machine is 280-290°C, the aperture of the spinneret is 0.15-0.3mm, the hot stretching temperature is 120-140°C, and the stretching ratio is 3 times; Polyamide is processed by the following steps: A1, adding glutaric acid and anhydrous ethanol into a reactor and stirring, raising the temperature of the reactor to 50-60° C., adding 1,3-diamino-2-propanol into the reactor, adjusting the pH of the system to 7-8, and post-treating to obtain glutarate, wherein the amount ratio of glutaric acid to anhydrous ethanol is 1 g:10 mL; A2, adding glutarate, caprolactam, deionized water and antioxidant into a reactor and stirring, raising the temperature of the reactor to 220-230°C, raising the pressure to 5-6MPa, keeping the temperature and pressure for 6-8h, and post-treating to obtain a crude polyamide, wherein the amount ratio of glutarate, caprolactam, deionized water and antioxidant is 5g:3g:6mL:0.2g, and the antioxidant is antioxidant 1010; A3. Add the crude polyamide and deionized water into a reactor and perform ultrasonic treatment. The temperature of the reactor is increased to 80-90° C. and the reactor is heat-treated for 20-24 hours. The polyamide is obtained by post-treatment, wherein the usage ratio of the crude polyamide and deionized water is 1 g:4-5 mL.

2. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 1, characterized in that: The preparation method of modified zinc oxide is as follows: adding nano zinc oxide, anhydrous ethanol and KH-560 into a reactor, ultrasonically dispersing for 30-50 minutes, raising the temperature of the reactor to 45-55°C, adding sodium hydroxide solution into the reactor, keeping the temperature for reaction for 2-3 hours, and post-treating to obtain modified zinc oxide.

3. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 2, characterized in that: The dosage ratio of the nano zinc oxide, anhydrous ethanol, KH-560 and sodium hydroxide solution is 5g:30mL:2g:8mL, the concentration of the sodium hydroxide solution is 0.8-1.5mol / L, and the particle size of the nano zinc oxide is 30-40nm.

4. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 1, characterized in that: Super matte chemical fiber filament is obtained by the following steps: B1, pretreating the polyester fiber to obtain pretreated polyester fiber; B2, loading the pretreated polyester fiber to obtain a modified polyester fiber with a titanium dioxide content of 3-5%; B4. Feed the modified polyester fiber into a spinning machine for spinning to obtain super matte chemical fiber filaments.

5. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 4, characterized in that: The pretreatment method in step B1 comprises the following steps: C1. Add polyester fiber and activation solution into a reactor, raise the temperature of the reactor to 50-60°C, perform ultrasonic dispersion for 40-50 minutes, and perform post-treatment to obtain activated fiber; C2. Add activated fiber, purified water and OP-10 into a reactor, soak at room temperature for 25-35 minutes, and post-treat to obtain pretreated polyester fiber.

6. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 5, characterized in that: In step C1, the polyester fiber and the activation solution are used in a ratio of 1 g:20 mL, and the activation solution is composed of sodium hydroxide, sodium dodecyl sulfate and 90 vol% ethanol aqueous solution in a ratio of 5 g:1 g:40 mL; in step C2, the activated fiber, purified water and OP-10 are used in a ratio of 5 g:50 mL:2 g.

7. The method for preparing the modified nylon fiber reinforced structure-responsive knitted fabric according to claim 4, characterized in that: The load processing in step B2 includes the following steps: D1. Add nano titanium dioxide, sodium nitrate and deionized water into a reaction kettle, and perform ultrasonic dispersion for 40-60 minutes at room temperature to obtain a titanium dioxide dispersion, wherein the nano titanium dioxide is anatase nano titanium dioxide; D2, adding the pretreated polyester fiber and the titanium dioxide dispersion into the reactor, raising the temperature of the reactor to 85-95°C, impregnating for 5-10 minutes, treating the impregnated polyester fiber with a padder to remove excess water, and then transferring the fiber to an oven at a temperature of 90-100°C, drying for 20-30 minutes, and obtaining a modified polyester fiber precursor; D3. Repeat the operation of step D2 until the titanium dioxide content on the polyester fiber reaches 3-5%, and dry to constant weight to obtain modified polyester fiber.

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