Cool and moisture-absorbing quick-drying nylon fabric and preparation method thereof

Abstract

The application relates to the technical field of textiles, and discloses a cool, moisture-absorbing and quick-drying nylon fabric and a preparation method thereof. The preparation method of the cool, moisture-absorbing and quick-drying nylon fabric comprises the following steps: combining modified silicon nitride and modified nano-aluminum oxide to obtain a composite cool material; blending and extruding nylon 56 and the composite cool material and cutting the same to obtain mixed chips; melting and spinning the mixed chips to obtain profiled cool nylon fibers; mixing the profiled cool nylon fibers with spandex fibers to form composite yarns, and knitting the composite yarns to obtain a cool nylon fabric; spraying a finishing liquid containing modified hexagonal boron nitride on one side of the cool nylon fabric to obtain the cool, moisture-absorbing and quick-drying nylon fabric; and the cool, moisture-absorbing and quick-drying nylon fabric has excellent cool feeling, moisture-absorbing and quick-drying performance, antibacterial performance and ultraviolet resistance, and is suitable for high-demand application scenarios such as outdoor, sportswear and summer clothing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, in particular to a cool, moisture-absorbing and quick-drying nylon fabric and a preparation method thereof. BACKGROUND

[0002] In recent years, with the progress of society, people's demand for comfortable functional fabrics is increasing, among which moisture-absorbing and quick-drying fabrics are favored. Moisture-absorbing and quick-drying fabrics can quickly absorb the moisture and sweat generated by the human body and conduct and evaporate it, eliminating the stuffy and sticky feeling after sweating and isolating the growth environment of bacteria and other microorganisms, so that the human body is always in a dry and comfortable microenvironment, maintaining the comfort of the human body for a long time.

[0003] Nylon fabric has great advantages in sports, outdoor, military and other fields, and maintaining the comfort of nylon fabric during exercise has always been the focus of research on sportswear. Nylon fabric has high moisture regain and strong moisture absorption capacity, but poor quick-drying performance. Moreover, nylon fabric has a certain coolness value, but it is too low, and the market generally requires a coolness value of QMAX 0.3 or above. Therefore, improving the moisture absorption and quick-drying performance and coolness of nylon fabric will greatly expand its application range and have important significance. SUMMARY

[0004] To solve the above technical problems, the present application provides a preparation method of a cool, moisture-absorbing and quick-drying nylon fabric, comprising the following steps:

[0005] Step one, nanometer aluminum oxide is sequentially reacted with silane coupling agent KH-550 and vanillin to obtain modified nanometer aluminum oxide;

[0006] Step two, silicon nitride is treated with lye to obtain hydroxylated silicon nitride; the hydroxylated silicon nitride is reacted with silane coupling agent KH-560 to obtain modified silicon nitride; the modified silicon nitride is combined with the modified nanometer aluminum oxide to obtain a composite cool material;

[0007] Step three, nylon 56 and the composite cool material are blended, extruded and cut into granules to obtain mixed chips; the mixed chips are melt-spun to obtain profiled cool nylon fibers; the profiled cool nylon fibers are blended with spandex fibers to form composite yarns, which are knitted to obtain cool nylon fabric;

[0008] Step four, a finishing liquid containing modified hexagonal boron nitride is sprayed on one side of the cool nylon fabric to obtain a cool, moisture-absorbing and quick-drying nylon fabric;

[0009] The modified hexagonal boron nitride is obtained by using magnolol as a crosslinking agent, combining mercapto hexagonal boron nitride and 1H, 1H, 2H, 2H-perfluorodecanethiol; the mercapto hexagonal boron nitride is obtained by reacting hydroxylated hexagonal boron nitride with 3-mercaptopropyl triethoxysilane; and the hydroxylated hexagonal boron nitride is obtained by treating hexagonal boron nitride with lye.

[0010] Preferably, in the step one, the preparation method of the modified nano-aluminum oxide is as follows:

[0011] The silane coupling agent KH-550, ethanol and deionized water are mixed in a mass ratio of 1:(20-50):(2-5), stirred for 40-60 min, then the nano-aluminum oxide is added, and stirred at 70-90℃ for 1-3 h to obtain the amino-nano-aluminum oxide; wherein the mass ratio of the silane coupling agent KH-550 to the nano-aluminum oxide is (1-2):10;

[0012] The amino-nano-aluminum oxide is added into ethanol and ultrasonically treated, then vanillin is added, heated to 60-70℃ in a nitrogen atmosphere, and stirred for 7-9 h to obtain the modified nano-aluminum oxide; wherein the mass ratio of the amino-nano-aluminum oxide, ethanol and vanillin is (3-5):(80-100):(2-3);

[0013] In the above process, the hydroxyl groups of the nano-aluminum oxide react with the silanol groups after the hydrolysis of the silane coupling agent KH-550, so that the amino groups are introduced on the surface of the nano-aluminum oxide to obtain the amino-nano-aluminum oxide; and then the amino-nano-aluminum oxide reacts with the vanillin through the reaction of the amino groups and the carbon-carbon double bonds to combine the vanillin on the amino-nano-aluminum oxide.

[0014] Preferably, in the step two, the preparation method of the hydroxylated silicon nitride is as follows:

[0015] The silicon nitride and the sodium hydroxide aqueous solution with a concentration of 5 mol / L are mixed in a use amount ratio of (5-8) g:(500-700) mL, refluxed and stirred at 95-105℃ for 11-13 h to obtain the hydroxylated silicon nitride;

[0016] In the above process, the silicon nitride is treated with the sodium hydroxide aqueous solution, so that a large number of hydroxyl groups are introduced on the surface of the silicon nitride to obtain the hydroxylated silicon nitride.

[0017] Preferably, in the step two, the preparation method of the composite cool-feeling material is as follows:

[0018] The silane coupling agent KH-560, ethanol, and deionized water are mixed in a mass ratio of (0.02-0.03):1:(0.3-0.5), the pH of the mixed system is adjusted to 3-4, stirring for 1-1.5h, then adding the hydroxylated silicon nitride, stirring at 58-62℃ for 5.5-6.5h, purification, to obtain modified silicon nitride; wherein the mass ratio of silane coupling agent KH-560 and hydroxylated silicon nitride is (0.04-0.05):1;

[0019] The modified nano-aluminum oxide, modified silicon nitride, and dimethylformamide are mixed in a mass ratio of 1:1:(20-40), ultrasonic for 10-20min under the condition of 200-300W, then heated to 75-85℃, reaction for 20-30h, purification, to obtain the composite cooling material;

[0020] In the above process, the hydroxyl group of the hydroxylated silicon nitride reacts with the silanol group after the hydrolysis of the silane coupling agent KH-560, introducing the epoxy group on the surface of the silicon nitride to obtain the modified silicon nitride; the epoxy group of the modified silicon nitride reacts with the amino group on the modified nano-aluminum oxide, combining the modified nano-aluminum oxide and the modified silicon nitride to obtain the composite cooling material; wherein the nano-aluminum oxide and the silicon nitride both have excellent thermal conductivity, the nano-aluminum oxide also has hydrophilicity and good sunlight reflection ability, which can reduce the absorption of sunlight, and the two are combined by covalent bond, which can reduce the interfacial thermal resistance, and can play a more excellent synergistic thermal conductivity effect, improving the cooling of the nylon fabric from the aspects of thermal conductivity and sunlight reflection; the organic functional groups of the composite cooling material, i.e. the amino group and the hydroxyl group, improve the hydrophilicity of the mixed chips and can form hydrogen bonds with the nylon 56; the epoxy group in the composite cooling material can react with the amino group in the nylon 56, thereby improving the dispersibility of the composite cooling material and the bonding strength with the nylon 56, so that the nylon fabric has good cooling, moisture absorption, and washing resistance; in addition, the introduction of vanillin in the composite cooling material can improve the moisture absorption, antibacterial performance, and ultraviolet resistance of the fabric.

[0021] Preferably, in the step three, the preparation method of the mixed chips is as follows:

[0022] The nylon 56 is dried in a vacuum drying oven at 100-110℃ for 5-7h, then the nylon 56 and the composite cooling material are mixed in a mass ratio of 100:(4-10), and are blended and extruded by a double-screw extruder under the condition of a temperature of 250-270℃ and a rotation speed of 40-60rpm, and are pelletized to obtain the mixed chips.

[0023] Preferably, in the step three, the melt spinning conditions are as follows: the extrusion temperature is 230-260℃; the extrusion pressure is 8-15MPa; the assembly pressure is 12-18MPa; the side blowing speed is 0.3-0.5m / s, and the spinneret used for spinning is a "cross" structure.

[0024] Preferably, in the step three, the mass ratio of the profiled cool nylon fiber and the spandex fiber is 7:1; the English count of the composite yarn is 30-40S; the gram weight of the cool nylon fabric is 160-180g / m 2；

[0025] In the above process, the used spinneret hole is a "cross" structure in the melt spinning process, the nylon fiber is processed into profiled fiber, the specific surface area of the nylon fiber is improved, the moisture absorption, perspiration and heat dissipation effects of the fabric are improved, and thus the cool feeling, moisture absorption and quick drying performance of the nylon fabric are improved.

[0026] Preferably, in the step four, the finishing liquid is obtained by mixing modified hexagonal boron nitride and ethanol at a mass ratio of (0.2-0.4):1, and ultrasonic treatment for 1-2h; the spraying thickness of the finishing liquid is 0.1-0.2mm.

[0027] Further, in the step four, the preparation method of the modified hexagonal boron nitride is as follows:

[0028] The hydroxylated hexagonal boron nitride is obtained by mixing hexagonal boron nitride and 5mol / L sodium hydroxide aqueous solution at a dosage ratio of (5-8)g:(500-700)mL, refluxing and stirring at 95-105℃ for 11-13h, and purifying;

[0029] The mercaptohexagonal boron nitride is obtained by mixing 3-mercaptopropyltriethoxysilane, the hydroxylated hexagonal boron nitride and toluene at a mass ratio of (6-8):(1.5-2.5):100, ultrasonic dispersion for 20-40min, reflux reaction for 22-26h, and purifying;

[0030] The modified hexagonal boron nitride is obtained by adding the mercaptohexagonal boron nitride into ethanol, ultrasonic treatment, adding magnolol, heating to 50-60℃, then adding azobisisobutyronitrile, stirring for 3-5h, then adding 1H,1H,2H,2H-perfluorodecane sulfide, keeping the temperature at 50-60℃, and continuing stirring for 3-5h, and purifying; wherein the mass ratio of the mercaptohexagonal boron nitride, ethanol, magnolol, 1H,1H,2H,2H-perfluorodecane sulfide, azobisisobutyronitrile is (1-3):(60-100):(0.8-1.4):(1.5-2.5):(0.06-0.08);

[0031] In the above process, after the hexagonal boron nitride is treated by the sodium hydroxide aqueous solution, abundant hydroxyl groups are introduced on the surface of the hexagonal boron nitride to obtain hydroxylated hexagonal boron nitride, the hydroxylated hexagonal boron nitride is modified by 3-mercapto propyl triethoxysilane, the mercapto groups are introduced on the surface of the hydroxylated hexagonal boron nitride, then magnolol is used as a crosslinking agent, the carbon-carbon double bonds at both ends of the magnolol react with the mercapto groups of the mercapto-modified hexagonal boron nitride and 1H, 1H, 2H, 2H-perfluorodecanethiol, the structure of the magnolol and the fluorine-containing hydrophobic chain are introduced on the surface of the hexagonal boron nitride, the hexagonal boron nitride has good thermal conductivity, the magnolol has antibacterial and anti-ultraviolet effects, and the fluorine-containing hydrophobic chain improves the hydrophobicity of the hexagonal boron nitride, so that a hydrophobic surface is formed on one side of the cool nylon fabric, thereby obtaining the cool nylon fabric with a hydrophobic-hydrophilic wetting gradient, the hydrophobic side is in contact with the skin when worn, and one-way rapid evaporation of sweat is realized.

[0032] The cool and moisture-wicking nylon fabric is prepared by the preparation method of the cool and moisture-wicking nylon fabric.

[0033] Compared with the prior art, the cool and moisture-wicking nylon fabric has the following beneficial effects:

[0034] 1、The composite cool material has excellent thermal conductivity and sunlight reflection performance, and also has good antibacterial performance, anti-ultraviolet performance and hydrophilic performance.

[0035] 2、In the melt spinning process, the spinneret hole is in a "cross" structure, the nylon fiber is processed into a profiled fiber, the specific surface area of the nylon fiber is increased, the moisture-wicking and heat-dissipating effects of the fabric are improved, and the coolness, moisture-wicking and drying performance, antibacterial performance and anti-ultraviolet performance of the nylon fabric are improved.

[0036] 3、The cool nylon fabric is treated by the finishing liquid containing modified hexagonal boron nitride, so that the moisture-wicking and drying performance, antibacterial performance, anti-ultraviolet performance and coolness of the fabric are further improved.

[0037] In summary, by adding an additive in the melt spinning, improving the structure of the nylon fiber and finishing by spraying a finishing agent, the coolness, moisture-wicking and drying performance, antibacterial performance and anti-ultraviolet performance of the nylon fabric are significantly improved, and the nylon fabric is suitable for high-demand application scenarios such as outdoor, sportswear and summer clothing. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a contact coolness coefficient test comparison chart of the cool and moisture absorption quick-drying nylon fabric prepared by the examples 2-4 and the comparative examples 1-3 of the present application;

[0039] Figure 2 is an escherichia coli bacteriostatic rate test comparison chart of the cool and moisture absorption quick-drying nylon fabric prepared by the examples 2-4 and the comparative examples 1-3 of the present application;

[0040] Figure 3 is a water absorption rate test comparison chart of the cool and moisture absorption quick-drying nylon fabric prepared by the examples 2-4 and the comparative examples 1-3 of the present application;

[0041] Figure 4 is an evaporation rate test comparison chart of the cool and moisture absorption quick-drying nylon fabric prepared by the examples 2-4 and the comparative examples 1-3 of the present application;

[0042] Figure 5 is an elongation at break retention rate test comparison chart of the cool and moisture absorption quick-drying nylon fabric prepared by the examples 2-4 and the comparative examples 1-3 of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0044] Example 1

[0045] The present embodiment discloses a preparation method of modified hexagonal boron nitride, comprising the following steps:

[0046] 6.5 g of hexagonal boron nitride is added into 600 mL of sodium hydroxide aqueous solution with a concentration of 5 mol / L, and reflux stirring reaction is carried out at 100 ℃ for 12 h. After the reaction is completed, filtration is carried out, and the obtained solid product is washed by deionized water and vacuum dried at 80 ℃ to obtain hydroxylated hexagonal boron nitride;

[0047] 7 g of 3-mercaptopropyl triethoxysilane and 2 g of hydroxylated hexagonal boron nitride are added into 100 g of toluene, ultrasonic dispersion is carried out for 30 min, reflux reaction is carried out for 24 h, centrifugation is carried out, and the obtained precipitate is washed by anhydrous ethanol and dried at 50 ℃ to obtain mercaptohexagonal boron nitride;

[0048] 2g of mercapto hexagonal boron nitride was added into 80g of ethanol, and ultrasonic treatment was performed for 40min, 1.1g of magnolol was added, heated to 55℃, 0.07g of azobisisobutyronitrile was added, and stirring reaction was performed for 4h, then 2g of 1H, 1H, 2H, 2H-perfluorodecane sulfide was added, the temperature was kept at 55℃, and stirring reaction was continuously performed for 4h, after the reaction was completed, centrifugation was performed, the obtained precipitate was washed with anhydrous ethanol, and drying was performed at 50℃, to obtain modified hexagonal boron nitride.

[0049] Example 2

[0050] The present embodiment discloses a preparation method of a cool and moisture-absorbing quick-drying nylon fabric, comprising the following steps:

[0051] Step one, the silane coupling agent KH-550, ethanol and deionized water were mixed in a mass ratio of 1:50:5, stirred for 60min, then the nano-aluminum oxide was added, and stirring reaction was performed at 90℃ for 1h, filtration was performed, the obtained solid product was washed with deionized water, and vacuum drying was performed at 80℃, to obtain aminated nano-aluminum oxide; wherein the mass ratio of the silane coupling agent KH-550 and the nano-aluminum oxide was 2:10;

[0052] 5g of aminated nano-aluminum oxide was added into 100g of ethanol, ultrasonic treatment was performed for 40min, then 3g of vanillin was added, heated to 70℃ in a nitrogen atmosphere, and stirring reaction was performed for 7h, after the reaction was completed, the reaction system was cooled to room temperature, filtration was performed, the obtained solid product was washed with ethanol, and vacuum drying was performed at 80℃, to obtain modified nano-aluminum oxide;

[0053] Step two, 8g of silicon nitride was added into 700mL of 5mol / L sodium hydroxide aqueous solution, reflux stirring reaction was performed at 105℃ for 11h, after the reaction was completed, filtration was performed, the obtained solid product was washed with deionized water, and vacuum drying was performed at 80℃, to obtain hydroxylated silicon nitride;

[0054] The silane coupling agent KH-560, ethanol and deionized water were mixed in a mass ratio of 0.03:1:0.5, the pH of the mixed system was adjusted to 4 with 0.1mol / L hydrochloric acid aqueous solution, stirring was performed for 1.5h, then the hydroxylated silicon nitride was added, stirring reaction was performed at 62℃ for 5.5h, after the reaction was completed, filtration was performed, the obtained solid product was washed with deionized water, and vacuum drying was performed at 60℃, to obtain modified silicon nitride; wherein the mass ratio of the silane coupling agent KH-560 and the hydroxylated silicon nitride was 0.05:1;

[0055] The modified nano-aluminum oxide, the modified silicon nitride and dimethylformamide were mixed in a mass ratio of 1:1:40, ultrasonic treatment was performed under the condition of 300W for 10min, then heating was performed to 85℃, reaction was performed for 20h, after the reaction was completed, centrifugation was performed, the obtained precipitate was washed with ethanol, and drying was performed at 50℃, to obtain a composite cool material;

[0056] Step three, dry the nylon 56 in a vacuum drying oven at 110℃ for 5h, then mix the nylon 56 and the composite cool-feeling material at a mass ratio of 100:10, blend and extrude with a double screw extruder at a temperature of 270℃ and a rotating speed of 40rpm, and pelletize to obtain mixed chips;

[0057] Dry the mixed chips in a vacuum drying oven at 105℃ for 8h, and then melt and spin to obtain the profiled cool-feeling nylon fiber; the melt spinning conditions are: the extrusion temperature is 260℃; the extrusion pressure is 15MPa; the assembly pressure is 18MPa; the side blowing speed is 0.5m / s, and the spinning orifice is a "cross" structure;

[0058] Spunlaid the profiled cool-feeling nylon fiber and the spandex fiber into a composite yarn with a mass ratio of 7:1 to obtain a 40S yarn, and then knit to obtain a cool-feeling nylon fabric with a grammage of 180g / m 2

[0059] Step four, mix the modified hexagonal boron nitride and ethanol at a mass ratio of 0.4:1, and ultrasonic treat for 2h to obtain a finishing liquid; spray the finishing liquid on one side of the cool-feeling nylon fabric with a spraying thickness of 0.2mm, and dry to obtain a cool-feeling and moisture-absorbing quick-drying nylon fabric.

[0060] Example 3

[0061] The embodiment discloses a preparation method of a cool-feeling and moisture-absorbing quick-drying nylon fabric, comprising the following steps:

[0062] Step one, mix the silane coupling agent KH-550, ethanol and deionized water at a mass ratio of 1:35:3.5, stir for 50min, then add the nano-alumina, stir and react at 80℃ for 2h, filter, and vacuum dry the obtained solid product at 80℃ after washing with deionized water to obtain the aminated nano-alumina; wherein the mass ratio of the silane coupling agent KH-550 and the nano-alumina is 1.5:10;

[0063] Add 4g of the aminated nano-alumina into 90g of ethanol, ultrasonic treat for 30min, then add 2.5g of vanillin, heat to 65℃ in a nitrogen atmosphere, stir and react for 8h, after the reaction, cool the reaction system to room temperature, filter, and vacuum dry the obtained solid product at 80℃ after washing with ethanol to obtain the modified nano-alumina;

[0064] Step two, add 6.5g of silicon nitride into 600mL of a 5mol / L sodium hydroxide aqueous solution, reflux and stir at 100℃ for 12h, after the reaction, filter, and vacuum dry the obtained solid product at 80℃ after washing with deionized water to obtain the hydroxylated silicon nitride;

[0065] ​The silane coupling agent KH-560, ethanol and deionized water are mixed in a mass ratio of 0.025:1:0.4, the pH of the mixed system is adjusted to 3.5 with a 0.1 mol / L hydrochloric acid aqueous solution, stirred for 1.2 h, then the hydroxylated silicon nitride is added, and stirred at 60 DEG C for 6 h. After the reaction is completed, the solid product is filtered, washed with deionized water, and vacuum dried at 60 DEG C to obtain modified silicon nitride; wherein the mass ratio of the silane coupling agent KH-560 and the hydroxylated silicon nitride is 0.045:1.

[0066] The modified nano-aluminum oxide, the modified silicon nitride and the dimethylformamide are mixed in a mass ratio of 1:1:30, ultrasonic treated at 250 W for 15 min, then heated to 80 DEG C and reacted for 25 h. After the reaction is completed, centrifugation is performed, and the obtained precipitate is washed with ethanol and dried at 50 DEG C to obtain a composite cooling material.

[0067] Step three, the nylon 56 is dried in a vacuum drying oven at 105 DEG C for 6 h, then the nylon 56 and the composite cooling material are mixed in a mass ratio of 100:7, and the mixture is blended and extruded by a double screw extruder at a temperature of 260 DEG C and a rotation speed of 50 rpm, and then pelletized to obtain mixed chips.

[0068] The mixed chips are vacuum dried at 103 DEG C for 9 h, and then melt-spun to obtain a special-shaped cooling nylon fiber; the melt-spinning conditions are as follows: the extrusion temperature is 245 DEG C; the extrusion pressure is 11.5 MPa; the assembly pressure is 15 MPa; the side blowing speed is 0.4 m / s, and the spinneret used for spinning is a "cross" structure.

[0069] The special-shaped cooling nylon fiber and the spandex fiber are blended in a mass ratio of 7:1 to form a composite yarn with an English number of 35S, and then knitted to obtain a cooling nylon fabric with a grammage of 170 g / m 2 .

[0070] Step four, the modified hexagonal boron nitride and ethanol are mixed in a mass ratio of 0.3:1, ultrasonic treated for 1.5 h to obtain a finishing liquid; the finishing liquid is sprayed on one side of the cooling nylon fabric with a spraying thickness of 0.15 mm, and then dried to obtain a cooling and moisture-absorbing quick-drying nylon fabric.

[0071] Example 4

[0072] The embodiment discloses a preparation method of a cooling and moisture-absorbing quick-drying nylon fabric, comprising the following steps:

[0073] Step one, the silane coupling agent KH-550, ethanol and deionized water are mixed in a mass ratio of 1:20:2, stirred for 40 min, then nano-alumina is added, stirred at 70℃ for 3h, filtered, the obtained solid product is washed with deionized water and dried at 80℃ under vacuum to obtain aminated nano-alumina; wherein the mass ratio of silane coupling agent KH-550 and nano-alumina is 1:10;

[0074] 3-5g of aminated nano-alumina is added to 80g of ethanol, ultrasonic treatment for 20min, then 2g of vanillin is added, heated to 60℃ under nitrogen atmosphere, stirred for 9h, after the reaction is completed, the reaction system is cooled to room temperature, filtered, the obtained solid product is washed with ethanol and dried at 80℃ under vacuum to obtain modified nano-alumina;

[0075] Step two, 5g of silicon nitride is added to 500mL of 5mol / L sodium hydroxide aqueous solution, refluxed and stirred at 95℃ for 13h, after the reaction is completed, filtered, the obtained solid product is washed with deionized water and dried at 80℃ under vacuum to obtain hydroxylated silicon nitride;

[0076] The silane coupling agent KH-560, ethanol, deionized water are mixed in a mass ratio of 0.02:1:0.3, the pH of the mixed system is adjusted to 3 with 0.1mol / L hydrochloric acid aqueous solution, stirred for 1h, then the hydroxylated silicon nitride is added, stirred at 58℃ for 6.5h, after the reaction is completed, filtered, the obtained solid product is washed with deionized water and dried at 60℃ under vacuum to obtain modified silicon nitride; wherein the mass ratio of silane coupling agent KH-560 and hydroxylated silicon nitride is 0.04:1;

[0077] The modified nano-alumina, modified silicon nitride and dimethylformamide are mixed in a mass ratio of 1:1:20, ultrasonic treatment for 10min under the condition of 200W, then heated to 75℃, reacted for 30h, after the reaction is completed, centrifuged, the obtained precipitate is washed with ethanol and dried at 50℃ to obtain a composite cooling material;

[0078] Step three, the nylon 56 is dried in a vacuum drying oven at 100℃ for 7h, then the nylon 56 and the composite cooling material are mixed in a mass ratio of 100:4, blended and extruded by a twin-screw extruder under the condition of temperature 250℃ and rotation speed 40rpm, and pelletized to obtain mixed chips;

[0079] The mixed chips are vacuum dried at 100℃ for 10h, then melt-spun to obtain profiled cooling nylon fibers; the melt-spinning conditions are: extrusion temperature 230℃; extrusion pressure 8MPa; assembly pressure 12MPa; side blowing speed 0.3m / s, and the spinneret used for spinning is a "cross" structure;

[0080] The special-shaped cool nylon fiber and spandex fiber are blended into a composite yarn with a mass ratio of 7:1 to form a 30S yarn, which is knitted to obtain a cool nylon fabric with a grammage of 160 g / m 2 ;

[0081] Step four, mixing the modified hexagonal boron nitride and ethanol with a mass ratio of 0.2:1, and ultrasonic treatment for 1 h to obtain a finishing liquid; spraying the finishing liquid on one side of the cool nylon fabric with a spraying thickness of 0.1 mm, and drying to obtain a cool and moisture-absorbing quick-drying nylon fabric.

[0082] The modified hexagonal boron nitride in the above examples 2-4 is prepared by the method of example 1.

[0083] Comparative example 1

[0084] Comparative example 1 is compared with example 1, and in the process of preparing the mixed slice, the modified nano-aluminum oxide is used instead of the composite cool material, and other conditions are unchanged.

[0085] Comparative example 2

[0086] Comparative example 2 is compared with example 1, and in the process of preparing the mixed slice, the modified silicon nitride is used instead of the composite cool material, and other conditions are unchanged.

[0087] Comparative example 3

[0088] Comparative example 3 is compared with example 1, and in the process of preparing the cool and moisture-absorbing quick-drying nylon fabric, the cool nylon fabric is not treated by spraying the finishing liquid, i.e. the cool nylon fabric in this comparative example is the final product-cool and moisture-absorbing quick-drying nylon fabric, and other conditions are unchanged.

[0089] In the above examples and comparative examples, the hexagonal boron nitride has a brand PBN300, a white color, a melting point of 3000℃, and a mesh number of 9000 meshes, which is from Zhengzhou Botai Superhard Tool Co., Ltd.; the silicon nitride is a beta-phase silicon nitride with an average particle size of 5 microns, which is from Shanghai Xiangtian Nanometer Material Co., Ltd.; the nano-aluminum oxide is an AKP-30 type alpha-Al2O3 nano-particle (average particle size 100 nm), which is from Shanghai Bumi Applied Material Technology Co., Ltd.; and the nylon 56 (PA56) has a viscosity of 172.2 mL / g, which is from Shanghai Kaisai Biological Technology Research and Development Center Co., Ltd.

[0090] Experimental example

[0091] The cool and moisture-absorbing quick-drying nylon fabrics prepared by examples 2-4 and comparative examples 1-3 are tested for performance.

[0092] I. Contact coolness coefficient test: According to international standard GB / T 35263-2017 "Determination and evaluation of contact instantaneous coolness performance of textiles", each group of samples was tested for contact instantaneous coolness.

[0093] II. Moisture absorption and quick drying test: According to GB / T21655.1-2023 "Evaluation of moisture absorption and quick drying of textiles Part 1: single combination test method", the test was carried out.

[0094] III. Antimicrobial performance test: According to international standard GB / T20944.3-2008 "Evaluation of antimicrobial performance of textiles Part 3: oscillation method", the test was carried out, and the test strain was selected as Escherichia coli.

[0095] IV. Anti-ultraviolet performance: The elongation at break of the fiber sample was tested by using XL-1A filament strength tester, then each group of samples was subjected to ultraviolet artificial accelerated aging for 360h in the ultraviolet accelerated aging tester, the elongation at break of each group of samples after ultraviolet aging was tested, and the retention rate of elongation at break was calculated to represent the anti-ultraviolet performance of the sample.

[0096] Elongation at break test method: The sample was wound around the guide hook and guide wheel, and then passed through the upper and lower clamps to ensure that the sample was straight without slack. A pre-tension of 10cN was applied to the sample, and when the lower clamp moved down with the sample to the original position after the sample broke, the elongation at break of the sample was obtained. The clamping distance was 250mm, the stretching speed was 250mm / min, each sample was repeated more than 10 times, and the test results were averaged.

[0097] The test results are shown in Table 1:

[0098] Table 1

[0099]

[0100] From the test results of Table 1, it can be seen that the cool and moisture absorption and quick-drying nylon fabric prepared in Example 2-4 of the present application has excellent moisture absorption and quick-drying performance and cool feeling, and also has good antibacterial performance and ultraviolet resistance. From the comparison of Comparative Example 1 and Example 1, it can be seen that the modified silicon nitride in the composite cool material has a significant influence on the cool performance of the fabric due to its own thermal conductivity, and at the same time, the organic functional groups on the surface of the modified silicon nitride help to improve the hydrophilicity of the composite cool material and improve the dispersibility of the composite cool material, so the modified silicon nitride also has a positive influence on the ultraviolet resistance, antibacterial performance and moisture absorption and quick-drying performance of the fabric; From the comparison of Comparative Example 2 and Example 1, it can be seen that the modified nano-aluminum oxide in the composite cool material has a significant influence on the cool performance of the fabric due to the thermal conductivity and high sunlight reflection of nano-aluminum oxide, and the vanillin structure introduced on the surface of the modified nano-aluminum oxide improves the antibacterial performance, ultraviolet resistance and moisture absorption and quick-drying performance of the fabric; From the comparison of Comparative Example 3 and Example 1, it can be seen that by treating the cool nylon fabric with the finishing liquid containing modified hexagonal boron nitride, the thermal conductivity of the hexagonal boron nitride improves the cool feeling of the fabric, and the magnolol structure on the surface of the hexagonal boron nitride has a positive influence on the antibacterial performance and ultraviolet resistance of the fabric, but the introduction of the hydrophobic fluorine chain on the modified hexagonal boron nitride forms a hydrophobic-hydrophilic wetting gradient on both sides of the fabric to promote the evaporation of sweat, but has an adverse effect on the moisture absorption performance of the fabric.

[0101] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a cooling, moisture-wicking, quick-drying nylon fabric, characterized in that, Includes the following steps: Step 1: Nano-alumina is reacted sequentially with silane coupling agent KH-550 and vanillin to obtain modified nano-alumina; Step 2: Treat silicon nitride with alkaline solution to obtain hydroxylated silicon nitride; react hydroxylated silicon nitride with silane coupling agent KH-560 to obtain modified silicon nitride; Modified silicon nitride and modified nano-alumina are combined to obtain a composite cooling material; Step 3: Blend and extrude nylon 56 and composite cooling material, then granulate to obtain blended chips; melt spin the blended chips to obtain shaped cooling nylon fibers. Cooling nylon fibers and spandex fibers are blended into composite yarns and knitted to obtain cooling nylon fabrics. Step 4: Spray a finishing liquid containing modified hexagonal boron nitride onto one side of the cool-feeling nylon fabric to obtain a cool-feeling, moisture-wicking, quick-drying nylon fabric. The method for preparing the modified hexagonal boron nitride is as follows: Hexagonal boron nitride and a 5 mol / L sodium hydroxide aqueous solution were mixed at a ratio of (5-8) g:(500-700) mL, and the mixture was refluxed and stirred at 95-105℃ for 11-13 h. After purification, hydroxylated hexagonal boron nitride was obtained. 3-Mercaptopropyltriethoxysilane, hydroxylated hexagonal boron nitride, and toluene were mixed in a mass ratio of (6-8):(1.5-2.5):100, ultrasonically dispersed for 20-40 min, refluxed for 22-26 h, and purified to obtain thiolized hexagonal boron nitride. Thiolized hexagonal boron nitride was added to ethanol and sonicated. Magnolol was added and the mixture was heated to 50-60℃. Azobisisobutyronitrile was then added and the mixture was stirred for 3-5 hours. 1H,1H,2H,2H-perfluorodecanesulfonium was then added, and the temperature was maintained at 50-60℃. The mixture was stirred for another 3-5 hours and purified to obtain modified hexagonal boron nitride. The mass ratio of thiolated hexagonal boron nitride, ethanol, magnolol, 1H,1H,2H,2H-perfluorodecanesulfonium, and azobisisobutyronitrile was (1-3):(60-100):(0.8-1.4):(1.5-2.5):(0.06-0.08).

2. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step one, the method for preparing the modified nano-alumina is as follows: Silane coupling agent KH-550, ethanol, and deionized water were mixed at a mass ratio of 1:(20-50):(2-5) and stirred for 40-60 min. Then, nano-alumina was added, and the mixture was stirred at 70-90℃ for 1-3 h. After purification, aminated nano-alumina was obtained. The mass ratio of silane coupling agent KH-550 to nano-alumina was (1-2):

10. Aminated nano-alumina was added to ethanol, sonicated, and then vanillin was added. The mixture was heated to 60-70℃ under a nitrogen atmosphere and stirred for 7-9 hours. After purification, modified nano-alumina was obtained. The mass ratio of aminated nano-alumina, ethanol and vanillin was (3-5):(80-100):(2-3).

3. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step two, the method for preparing the hydroxylated silicon nitride is as follows: Silicon nitride and a 5 mol / L sodium hydroxide aqueous solution were mixed at a ratio of (5-8) g:(500-700) mL and refluxed at 95-105 °C for 11-13 h. The mixture was then purified to obtain hydroxylated silicon nitride.

4. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step two, the preparation method of the composite cooling material is as follows: Silane coupling agent KH-560, ethanol, and deionized water were mixed in a mass ratio of (0.02-0.03):1:(0.3-0.5), the pH of the mixture was adjusted to 3-4, and the mixture was stirred for 1-1.5 h. Then, hydroxylated silicon nitride was added, and the mixture was stirred at 58-62℃ for 5.5-6.5 h. After purification, modified silicon nitride was obtained. The mass ratio of silane coupling agent KH-560 to hydroxylated silicon nitride was (0.04-0.05):

1. Modified nano-alumina, modified silicon nitride, and dimethylformamide were mixed in a mass ratio of 1:1:(20-40), sonicated at 200-300W for 10-20 minutes, then heated to 75-85℃ and reacted for 20-30 hours. After purification, the composite cooling material was obtained.

5. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step three, the method for preparing the mixed slices is as follows: Nylon 56 was dried in a vacuum drying oven at 100-110℃ for 5-7 hours. Then, Nylon 56 and composite cooling material were mixed at a mass ratio of 100:(4-10). The mixture was then extruded and pelletized using a twin-screw extruder at a temperature of 250-270℃ and a speed of 40-60rpm to obtain mixed chips.

6. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step three, the melt spinning conditions are as follows: extrusion temperature is 230-260℃; extrusion pressure is 8-15MPa; component pressure is 12-18MPa; side blowing speed is 0.3-0.5m / s; and the spinneret used for spinning has a cross-shaped structure.

7. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step three, the mass ratio of the shaped cooling nylon fiber to the spandex fiber is 7:1; the English count of the composite yarn is 30-40S; and the weight of the cooling nylon fabric is 160-180 g / m². 2 .

8. The method for preparing the cool-feeling, moisture-wicking, and quick-drying nylon fabric according to claim 1, characterized in that, In step four, the finishing liquid is obtained by mixing modified hexagonal boron nitride and ethanol at a mass ratio of (0.2-0.4):1 and ultrasonically treating for 1-2 hours; the coating thickness of the finishing liquid is 0.1-0.2 mm.

9. A cool-feeling, moisture-wicking, quick-drying nylon fabric prepared by the method described in any one of claims 1-8.

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