Knitted fabric for temperature-controllable underwear and preparation method thereof

Abstract

The invention relates to the technical field of knitted fabrics, in particular to a knitted fabric for temperature-controllable underwear and a preparation method thereof.The preparation method includes the following steps that chitosan fibers, nano-silver fibers and polyester fibers are blended according to the weight ratio of 1: 1: 2 to form first blended yarn; uniformly mixing the matrix containing the temperature control capsule, the modified blender and the filler aid according to the weight ratio of (11-13): 3: 2, feeding the mixture into a double-screw extruder for melt extrusion, and then spinning to obtain the modified polyester fiber. According to the knitted fabric, the chitosan fibers are matched with the nano-silver fibers and the polyester fibers to form the first blended yarn through blending, the temperature control, breathability, stain resistance and bacterium resistance of the obtained knitted fabric are coordinated and improved, and the performance stability effect of the product under the water washing and ultraviolet high heat conditions is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of knitted fabrics, and in particular to a knitted fabric for temperature-controllable underwear and a preparation method thereof. Background Art

[0002] Knitted fabric is a fabric formed by using knitting needles to bend yarn into loops and intertwine them. The difference between knitted fabric and woven fabric is that the yarn has different forms in the fabric. Knitting is divided into weft knitting and warp knitting. Knitted fabric is widely used in clothing fabrics and linings, home textiles and other products, and is loved by consumers.

[0003] Existing underwear knitted fabrics have poor temperature control performance, as well as poor breathability, antibacterial and anti-fouling properties. It is difficult to achieve coordinated improvements in temperature control, breathability, antibacterial and anti-fouling properties. At the same time, the performance stability of the product is poor under water washing, ultraviolet and high-heat conditions, which further limits the product's use efficiency. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a knitted fabric for temperature-controllable underwear and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions: The present invention provides a method for preparing a knitted fabric for temperature-controllable underwear, comprising the following steps: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsule, the modifying agent and the filler additive in a weight ratio of (11-13):3:2, feed them into a twin-screw extruder for melt extrusion, and then spin them to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

[0006] Preferably, the temperatures of the six temperature zones of the twin-screw extruder from the feed end to the die head are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0007] Preferably, the preparation method of the modified conditioning agent is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 2-4 parts of nano-alumina, 1-3 parts of silicon carbide whiskers, 1-2 parts of nano-silica sol and 4-7 parts of lanthanum chloride solution are mixed and stirred thoroughly by weight to obtain a blended modified solution.

[0008] Preferably, the mass fraction of the lanthanum chloride solution is 2-5%.

[0009] Preferably, the ball milling temperature of the ball milling improvement treatment is 55-60° C., the ball milling is performed for 1 hour, and the ball milling speed is 450-550 r / min.

[0010] Preferably, the preparation method of the filler auxiliary agent is: S101: placing the carbon nanotubes in an acid solution 4-7 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes are dispersed in deionized water at a volume of 5-8 times the total weight of the acid-treated carbon nanotubes, and then potassium permanganate at a volume of 15-20% of the total weight of the acid-treated carbon nanotubes is added thereto. The mixture is stirred in the dark, freeze-dried, sintered at 800° C. for 2 h, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 2-5 parts of nano-attapulgite, 1-2 parts of silane coupling agent KH550, and 1-3 parts of nano-titanium dioxide to 5-8 parts of sodium citrate solution by weight, and stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

[0011] Preferably, the acid solution is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:3, the light-proof stirring time is 10 hours, and the stirring speed is 100 r / min; the pickling is carried out using 5% hydrochloric acid for 1 hour.

[0012] Preferably, the mass fraction of the sodium citrate solution is 2-5%; the stirring temperature of the stirring treatment is 55-60° C., the stirring speed is 550-750 r / min, and the stirring time is 1-2 h.

[0013] Preferably, the preparation method of the additive is: Periclase powder and shell powder are added to an yttrium nitrate solution 4-7 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 210-230°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 2-5°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 350-400W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

[0014] Preferably, the mass fraction of the urea solution is 2-5%; the mass fraction of the yttrium nitrate solution is 3-6%.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The knitted fabric of the present invention adopts chitosan fiber, nano silver fiber and polyester fiber to be blended to form a first blended yarn, and adopts modified polyester fiber and cotton fiber to be blended to form a second blended yarn. The knitted fabric is knitted by knitting the first and second blended yarns. The obtained knitted fabric has coordinated improvements in temperature control, air permeability, anti-fouling and antibacterial properties, and the product has significant performance stability under water washing and ultraviolet high-heat conditions; the temperature control capsule adopts an arabic gum aqueous solution combined with paraffin, and is improved by blending ethyl orthosilicate and a hydrochloric acid solution with a pH value of 3.0, so that the obtained temperature control capsule can achieve product temperature control of 18-25°C in the fabric system; the modified blending agent adopts boron nitride and is treated with a potassium permanganate solution and a hydrochloric acid solution to optimize its active efficiency, and then the blended modified liquid is ball-milled and improved, the nano-alumina in the blended modified liquid is used as a matrix, and is blended and improved by blending with silicon carbide whiskers, nano-silica sol and lanthanum chloride solution, Through the coordination and matching of the raw materials, the modified blending agent obtained improves boron nitride, and optimizes the performance stability and performance coordination of the product in the modified polyester fiber; the carbon nanotubes used in the filler auxiliary agent are improved and processed to make porous carbon nanotubes, which optimizes the air permeability of the system, and is improved at the same time with the modification liquid. The nano-attapulgite, silane coupling agent KH550, nano-titanium dioxide and sodium citrate solution in the modification liquid are blended and matched, and the co-matching synergy between the raw materials is adopted to further enhance the air permeability of the system and achieve coordinated improvement in temperature control, breathability, anti-fouling and antibacterial properties. At the same time, the performance stability of the product under water washing and ultraviolet high-heat conditions is significant; the additives are made of forsterite powder and shell powder, which are treated with yttrium nitrate solution, improved by calcination, and then ultrasonically treated with urea solution and tourmaline powder. The co-matching and matching of the raw materials enhances the supplementary effect of the additives in the system, thereby further improving the performance of the product. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. 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 making creative efforts are within the scope of protection of the present invention.

[0017] The method for preparing a knitted fabric for temperature-controllable underwear of this embodiment includes the following steps: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsule, the modifying agent and the filler additive in a weight ratio of (11-13):3:2, feed them into a twin-screw extruder for melt extrusion, and then spin them to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

[0018] The temperatures of the six temperature zones from the feed end to the die head of the twin-screw extruder of this embodiment are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0019] The preparation method of the modified blending agent of this embodiment is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 2-4 parts of nano-alumina, 1-3 parts of silicon carbide whiskers, 1-2 parts of nano-silica sol and 4-7 parts of lanthanum chloride solution are mixed and stirred thoroughly by weight to obtain a blended modified solution.

[0020] The mass fraction of the lanthanum chloride solution of the present embodiment is 2-5%.

[0021] The ball milling temperature of the improved ball milling treatment in this embodiment is 55-60° C., ball milling for 1 hour, and ball milling speed of 450-550 r / min.

[0022] The preparation method of the filler auxiliary agent of this embodiment is: S101: placing the carbon nanotubes in an acid solution 4-7 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes are dispersed in deionized water at a volume of 5-8 times the total weight of the acid-treated carbon nanotubes, and then potassium permanganate at a volume of 15-20% of the total weight of the acid-treated carbon nanotubes is added thereto. The mixture is stirred in the dark, freeze-dried, sintered at 800° C. for 2 h, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 2-5 parts of nano-attapulgite, 1-2 parts of silane coupling agent KH550, and 1-3 parts of nano-titanium dioxide to 5-8 parts of sodium citrate solution by weight, and stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

[0023] The acid solution of this embodiment is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:3. The light-proof stirring time is 10 hours and the stirring speed is 100 r / min. The pickling is carried out using 5% hydrochloric acid for 1 hour.

[0024] The mass fraction of the sodium citrate solution in this embodiment is 2-5%; the stirring temperature of the stirring process is 55-60° C., the stirring speed is 550-750 r / min, and the stirring time is 1-2 h.

[0025] The preparation method of the additive of this embodiment is: Periclase powder and shell powder are added to an yttrium nitrate solution 4-7 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 210-230°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 2-5°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 350-400W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

[0026] The mass fraction of the urea solution in this embodiment is 2-5%; the mass fraction of the yttrium nitrate solution is 3-6%.

[0027] Example 1: A method for preparing a knitted fabric for temperature-controllable underwear, comprising the following steps: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsules, the modifying agent and the filler additive in a weight ratio of 11:3:2, feed them into a twin-screw extruder for melt extrusion, and then spin them to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

[0028] The temperatures of the six temperature zones from the feed end to the die head of the twin-screw extruder of this embodiment are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0029] The preparation method of the modified blending agent of this embodiment is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 2 parts of nano-alumina, 1 part of silicon carbide whisker, 1 part of nano-silica sol and 4 parts of lanthanum chloride solution were mixed and stirred thoroughly according to weight to obtain a blended modified solution.

[0030] The mass fraction of the lanthanum chloride solution of the present embodiment is 2%.

[0031] The ball milling temperature of the improved ball milling process in this embodiment is 55° C., the ball milling time is 1 hour, and the ball milling speed is 450 r / min.

[0032] The preparation method of the filler auxiliary agent of this embodiment is: S101: placing the carbon nanotubes in an acid solution 4 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes were dispersed in deionized water at a volume of 5 times the total weight of the acid-treated carbon nanotubes, and potassium permanganate (15% of the total weight of the acid-treated carbon nanotubes) was added thereto. The mixture was stirred in the dark, freeze-dried, sintered at 800°C for 2 hours, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 2 parts of nano-attapulgite, 1 part of silane coupling agent KH550, and 1 part of nano-titanium dioxide to 5 parts of sodium citrate solution by weight, stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

[0033] The acid solution of this embodiment is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:3. The light-proof stirring time is 10 hours and the stirring speed is 100 r / min. The pickling is carried out using 5% hydrochloric acid for 1 hour.

[0034] The mass fraction of the sodium citrate solution in this embodiment is 2%; the stirring temperature of the stirring process is 55° C., the stirring speed is 550 r / min, and the stirring is carried out for 1 hour.

[0035] The preparation method of the additive of this embodiment is: Periclase powder and shell powder are added to an yttrium nitrate solution 4 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 210°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 2°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 350W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

[0036] The mass fraction of the urea solution in this embodiment is 2%; the mass fraction of the yttrium nitrate solution is 3%.

[0037] Example 2: A method for preparing a knitted fabric for temperature-controllable underwear, comprising the following steps: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsules, the modifying agent and the filler additive in a weight ratio of 13:3:2, feed the mixture into a twin-screw extruder for melt extrusion, and then spin the mixture to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

[0038] The temperatures of the six temperature zones from the feed end to the die head of the twin-screw extruder of this embodiment are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0039] The preparation method of the modified blending agent of this embodiment is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 4 parts of nano-alumina, 3 parts of silicon carbide whiskers, 2 parts of nano-silica sol and 7 parts of lanthanum chloride solution were mixed and stirred thoroughly according to weight to obtain a blended modified solution.

[0040] The mass fraction of the lanthanum chloride solution of the present embodiment is 5%.

[0041] The ball milling temperature of the ball milling improvement treatment in this embodiment is 60° C., ball milling for 1 hour, and ball milling speed of 550 r / min.

[0042] The preparation method of the filler auxiliary agent of this embodiment is: S101: placing the carbon nanotubes in an acid solution with a weight of 7 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes were dispersed in deionized water at a volume of 8 times the total weight of the acid-treated carbon nanotubes, and then potassium permanganate (20% of the total weight of the acid-treated carbon nanotubes) was added thereto. The mixture was stirred in the dark, and then freeze-dried. The mixture was then sintered at 800°C for 2 hours, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 5 parts of nano-attapulgite, 2 parts of silane coupling agent KH550, and 3 parts of nano-titanium dioxide to 8 parts of sodium citrate solution by weight, stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

[0043] The acid solution of this embodiment is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:3. The light-proof stirring time is 10 hours and the stirring speed is 100 r / min. The pickling is carried out using 5% hydrochloric acid for 1 hour.

[0044] The mass fraction of the sodium citrate solution in this embodiment is 5%; the stirring temperature of the stirring process is 60° C., the stirring speed is 750 r / min, and the stirring is carried out for 2 h.

[0045] The preparation method of the additive of this embodiment is: Periclase powder and shell powder are added to an yttrium nitrate solution 7 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 230°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 5°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 400W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

[0046] The mass fraction of the urea solution in this embodiment is 5%; the mass fraction of the yttrium nitrate solution is 6%.

[0047] Example 3: A method for preparing a knitted fabric for temperature-controllable underwear, comprising the following steps: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsules, the modifying agent and the filler additive in a weight ratio of 12:3:2, feed them into a twin-screw extruder for melt extrusion, and then spin them to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

[0048] The temperatures of the six temperature zones from the feed end to the die head of the twin-screw extruder of this embodiment are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0049] The preparation method of the modified blending agent of this embodiment is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 3 parts of nano-alumina, 2 parts of silicon carbide whiskers, 1.5 parts of nano-silica sol and 5.5 parts of lanthanum chloride solution were mixed and stirred thoroughly according to weight to obtain a blended modified solution.

[0050] The mass fraction of the lanthanum chloride solution of the present embodiment is 3.5%.

[0051] The ball milling temperature of the improved ball milling process in this embodiment is 57.5° C., the ball milling is performed for 1 hour, and the ball milling speed is 500 r / min.

[0052] The preparation method of the filler auxiliary agent of this embodiment is: S101: placing the carbon nanotubes in an acid solution 5.5 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes were dispersed in deionized water at a volume of 6.5 times the total weight of the acid-treated carbon nanotubes, and potassium permanganate at a volume of 17.5% of the total weight of the acid-treated carbon nanotubes was added thereto. The mixture was stirred in the dark, freeze-dried, sintered at 800°C for 2 hours, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 3.5 parts of nano-attapulgite, 1.5 parts of silane coupling agent KH550, and 2 parts of nano-titanium dioxide to 6.5 parts of sodium citrate solution by weight, stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

[0053] The acid solution of this embodiment is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:3. The light-proof stirring time is 10 hours and the stirring speed is 100 r / min. The pickling is carried out using 5% hydrochloric acid for 1 hour.

[0054] The mass fraction of the sodium citrate solution in this embodiment is 3.5%; the stirring temperature of the stirring process is 57.5° C., the stirring speed is 600 r / min, and the stirring time is 1.5 h.

[0055] The preparation method of the additive of this embodiment is: Periclase powder and shell powder are added to an yttrium nitrate solution 5.5 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 220°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 3.5°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 375W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

[0056] The mass fraction of the urea solution in this embodiment is 3.5%; the mass fraction of the yttrium nitrate solution is 4.5%.

[0057] Comparative Example 1: The difference from Example 3 is that no modifying agent is added to the modified polyester fiber.

[0058] Comparative Example 2: The difference from Example 3 is that no conditioning liquid treatment is used in the preparation of the modified conditioning agent.

[0059] Comparative Example 3: The difference from Example 3 is that no nano-alumina and silicon carbide whiskers are added to the blended modified liquid.

[0060] Comparative Example 4: The difference from Example 3 is that no dry boron nitride is added in the preparation of the modified conditioning agent.

[0061] Comparative Example 5: The difference from Example 3 is that no filler additive is added to the modified polyester fiber.

[0062] Comparative Example 6: The difference from Example 3 is that the porous carbon nanotubes prepared by S101 in the filler additive are directly replaced by carbon nanotube raw materials.

[0063] Comparative Example 7: The difference from Example 3 is that no modification liquid treatment is used in the preparation of the porous carbon nanotube modification liquid.

[0064] Comparative Example 8: The difference from Example 3 is that no nano-attapulgite and nano-titanium dioxide are added to the modified solution.

[0065] Comparative Example 9: The difference from Example 3 is that no additives are added during the preparation of the filler auxiliary agent.

[0066] Temperature control test: After the products of Examples 1-3 were placed at an ambient temperature of 5°C for 2 hours, the product temperature was measured to reach 18°C. After the products were placed at 40°C for 2 hours, the product temperature was measured to reach 25°C. The products of Examples 1-3 can achieve a temperature control effect of 18-25°C.

[0067] The products of Examples 1 to 3 and Comparative Examples 1 to 9 were tested for antifouling, antibacterial and air permeability under normal conditions and water washing and ultraviolet high heat conditions. The water washing and ultraviolet high heat conditions were as follows: the products were placed under 200W / m 2 The UV intensity was 0.5 and the temperature was 70°C for 48 hours, and then the surface was washed with water 10 times. The test results are shown in Table 1.

[0068] Table 1 Product performance test results of Examples 1 to 3 and Comparative Examples 1 to 9: It can be seen from Comparative Examples 1 to 9 and Examples 1 to 3 that the product of Example 3 has excellent anti-fouling, antibacterial and breathable properties, and the product has good temperature control performance. In addition, the product has significant performance stability under water washing, ultraviolet and high heat conditions. Comparative Examples 1 to 9 and Example 3 show that when no modifying agent or filler additive is added to the modified polyester fiber of the present invention, the performance of the product shows a significant trend of deterioration. Furthermore, when the modified agent is not treated with a modifying liquid, nano-alumina and silicon carbide whiskers are not added to the modifying liquid, and dry boron nitride is not added to the modified agent, the performance of the product also shows a trend of deterioration. The modified agent obtained by the specific method of the present invention has significant product performance effects, and the product performance effect is most significant when only the modified agent and filler additive are prepared in the specific process of the present invention. At the same time, no filler additive was added to the modified polyester fiber, the porous carbon nanotubes prepared by S101 in the filler additive was directly replaced by carbon nanotube raw materials, no modifying liquid treatment was used in the preparation of the porous carbon nanotube modifying liquid, no nano-attapulgite and nano-titanium dioxide were added to the modifying liquid, and no additives were added in the preparation of the filler additive. The performance of the product showed a trend of deterioration to varying degrees, and no additives were added in the preparation of the filler additive, and the product performance deteriorated significantly. At the same time, the performance effect of the product was the most significant when the modifying liquid obtained by the specific method of the present invention was combined with additives and the filler additive obtained by the porous carbon nanotubes prepared by S101. The effect of other methods was not as significant as that of the present invention.

[0069] The present invention further explores the product performance through the preparation of additives.

[0070] Experimental Example 1: The same as Example 3, except that no cooling product was added during the preparation of the additive.

[0071] Experimental Example 2: The same as Example 3, the only difference is that tourmaline powder is not added in the preparation of the additive.

[0072] Experimental Example 3: The same as Example 3, the only difference is that the urea solution is replaced by water in the preparation of the additive.

[0073] Experimental Example 4: The same as Example 3, except that no periclase powder was added in the preparation of the cooled product.

[0074] Experimental Example 5: The same as Example 3, except that no shell powder is added in the preparation of the cooled product.

[0075] Experimental Example 6: The same as Example 3, the only difference is that the yttrium nitrate solution is replaced by water.

[0076] The same test was performed on the products of Experimental Examples 1 to 6. The test results are shown in Table 2.

[0077] Table 2 Product performance test results of Experimental Examples 1 to 6: It can be seen from Experimental Examples 1 to 6 that when no cooling product is added in the preparation of the additive, the performance of the product deteriorates significantly. When no tourmaline powder is added in the preparation of the additive and water is used instead of urea solution in the preparation of the additive, the performance also shows a trend of varying degrees of deterioration. When no periclase powder is added in the preparation of the cooling product, no shell powder is added in the preparation of the cooling product, and water is used instead of yttrium nitrate solution, the performance of the product all tends to deteriorate. Only when the cooling product prepared by the method of the present invention is combined with urea solution and tourmaline powder raw materials, the performance effect of the product is the most significant. When other methods are used instead, the performance effects are not as significant as those of the present invention.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0079] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for preparing a knitted fabric for temperature-controllable underwear, characterized in that: The following steps are involved: Step 1: blending chitosan fiber, nanosilver fiber and polyester fiber in a weight ratio of 1:1:2 to form a first blended yarn; Step 2: Mix the base agent containing the temperature control capsule, the modifying agent and the filler additive in a weight ratio of (11-13):3:2, feed them into a twin-screw extruder for melt extrusion, and then spin them to obtain modified polyester fibers; The matrix containing the temperature control capsule is prepared by mixing the temperature control capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:

15. Step 3: blending the modified polyester fiber and the cotton fiber in a weight ratio of 2:3 to form a second blended yarn; Step 4: knitting the first blended yarn and the second blended yarn through a circular knitting machine to obtain a knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260, and the twist coefficient of the second blended yarn is 360.

2. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 1, characterized in that: The temperatures of the six temperature zones of the twin-screw extruder from the feed end to the die head are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively; the spinning temperature of the spinning process is 280°C; The preparation method of the temperature-control capsule is as follows: 1 L of a 1.5% aqueous solution of gum arabic was stirred until transparent and uniform; 141 g of paraffin wax was heated and melted, then added to the gum arabic solution and emulsified for 20 minutes to obtain an emulsion; then 100 g of a 2.5% aqueous solution of polyethyleneimine was added to the emulsion and reacted for 2 hours to obtain an emulsion; 150 g of ethyl orthosilicate and 4 g of hydrochloric acid solution with a pH of 3.0 were mixed to form a mixed solution, which was then added to the emulsion. The mixture was reacted at 35° C. for 4 h. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

3. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 1, characterized in that: The preparation method of the modified conditioning agent is: S01: Stir the boron nitride evenly in a sufficient amount of 5% by mass potassium permanganate solution, then filter and dry, then stir thoroughly in a sufficient amount of 5% by mass hydrochloric acid solution, then wash with water, filter and dry to obtain dry boron nitride; S02: ball milling the dried boron nitride and the modified solution in a weight ratio of 5:

3. After the ball milling is completed, the mixture is filtered and dried to obtain a modified modified agent. The preparation method of the blending modified liquid is as follows: 2-4 parts of nano-alumina, 1-3 parts of silicon carbide whiskers, 1-2 parts of nano-silica sol and 4-7 parts of lanthanum chloride solution are mixed and stirred thoroughly by weight to obtain a blended modified solution.

4. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 3, characterized in that: The mass fraction of the lanthanum chloride solution is 2-5%.

5. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 3, characterized in that: The ball milling temperature of the ball milling improvement treatment is 55-60° C., the ball milling is performed for 1 hour, and the ball milling speed is 450-550 r / min.

6. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 1, characterized in that: The preparation method of the filler auxiliary agent is: S101: placing the carbon nanotubes in an acid solution 4-7 times the total weight of the carbon nanotubes and stirring for 12 hours, then filtering and washing to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes are dispersed in deionized water at a volume of 5-8 times the total weight of the acid-treated carbon nanotubes, and then potassium permanganate at a volume of 15-20% of the total weight of the acid-treated carbon nanotubes is added thereto. The mixture is stirred in the dark, freeze-dried, sintered at 800° C. for 2 h, and finally acid-washed, filtered, and dried to obtain porous carbon nanotubes. S102: adding 2-5 parts of nano-attapulgite, 1-2 parts of silane coupling agent KH550, and 1-3 parts of nano-titanium dioxide to 5-8 parts of sodium citrate solution by weight, and stirring evenly to obtain a modified solution; The porous carbon nanotubes and the modified liquid are stirred at a weight ratio of 2:5, and the stirring is completed to obtain a porous carbon nanotube modified liquid; S103: The porous carbon nanotube modification liquid and the additive are mixed in a weight ratio of 5:3, and ball-milled at a ball-milling speed of 1500 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain a filler additive.

7. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 6, characterized in that: The acid solution is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% in a weight ratio of 1:

3. The light-proof stirring time is 10 hours and the stirring speed is 100 r / min. The pickling is carried out using hydrochloric acid with a mass fraction of 5% for 1 hour.

8. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 6, characterized in that: The mass fraction of the sodium citrate solution is 2-5%; the stirring temperature of the stirring process is 55-60° C., the stirring speed is 550-750 r / min, and the stirring time is 1-2 hours.

9. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 6, characterized in that: The preparation method of the additive is: Periclase powder and shell powder are added to an yttrium nitrate solution 4-7 times the total weight of the periclase powder in a weight ratio of 2:3, and then filtered and dried. The mixture is then calcined at 210-230°C for 1 hour. After the calcination is completed, the mixture is cooled to 55°C at a rate of 2-5°C / min to obtain a cooled product. The cooled product, urea solution and tourmaline powder are then ultrasonically treated in a weight ratio of 3:5:1 with an ultrasonic power of 350-400W for 1 hour. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain an additive.

10. The method for preparing a knitted fabric for temperature-controllable underwear according to claim 9, characterized in that: The mass fraction of the urea solution is 2-5%; the mass fraction of the yttrium nitrate solution is 3-6%.

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