A heat-insulating and light-shielding window curtain and a method for manufacturing the same

Abstract

The application discloses a heat-insulating and light-shielding curtain and a preparation method thereof, and relates to the field of curtains. The graphene oxide is first prepared into a hydrogel, and modified carbon black is added to improve the light-shielding performance of the curtain; then, silver carboxylate is generated by the reaction between silver oxide and the carboxyl in the hydrogel, so that the antibacterial effect of the curtain is improved; the hydrogel is then frozen and spun, and is woven to obtain an aerogel fabric layer; bamboo charcoal microsphere particles are added to a bottom glue layer, and form spherical protrusions with tin foil, so that the light can be reflected, and the light-shielding effect is improved; the main raw material of a surface glue layer is titanium dioxide modified polyurethane, which is rolled on the surface of the tin foil to further improve the light-shielding, heat-insulating and antibacterial performances; finally, electrostatic flocking is performed to obtain the curtain with the heat-insulating and light-shielding effects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of window curtains, in particular to a heat-insulating and light-blocking window curtain and a preparation method thereof. BACKGROUND

[0002] People are increasingly pursuing the quality of life while busy life. As a necessary part of home decoration, window curtains are increasingly valued by people. The light-blocking effect of window curtains can adjust indoor light and light according to needs. When resting, we may need darker light, and it can effectively block the line of sight and increase the privacy of the homeowner, so the light-blocking property of the window curtain is very important. For a good window curtain, heat insulation is also a necessary function. In winter, window curtains can reduce the loss of indoor heat; in summer, window curtains can block the ultraviolet radiation from the outside and reduce the temperature in the room. Although window curtains affect the quality of life, only a small part of the population can pay attention to window curtains. Large window curtains are rarely taken down for cleaning, but in a continuous rainy day, the window curtains as textiles are prone to damp and mildew, which not only affects the appearance, but also has a great harm to human health.

[0003] However, the existing window curtain preparation technology is already backward and cannot simultaneously consider the heat-insulating and light-blocking effects and the antibacterial effect. Therefore, the present application prepares a window curtain integrating heat insulation and light blocking, while considering antibacterial and aesthetic effects. SUMMARY

[0004] The present application aims to provide a heat-insulating and light-blocking window curtain and a preparation method thereof to solve the problems in the prior art.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a heat-insulating and light-blocking window curtain, comprising an aerogel fabric layer, a bottom glue layer, a tin foil layer and a surface glue layer.

[0006] Further, the aerogel fabric layer is obtained by adding carbon black to graphene oxide hydrogel and reacting with silver oxide to obtain modified hydrogel, then spinning fibers with polyvinyl alcohol, and weaving.

[0007] Further, the bottom glue layer is prepared by mixing environment-friendly soft glue, foam stabilizer, foaming agent, ammonia and bamboo charcoal microspheres.

[0008] Further, the surface glue layer is prepared by mixing titanium dioxide modified polyurethane, phosphorus-based halogen-free flame-retardant dispersant, foam stabilizer, foaming agent and ammonia; the titanium dioxide modified polyurethane is prepared by reacting hydroxyl-rich titanium dioxide obtained by hydrolysis of titanium disulfide with polyurethane.

[0009] Further, a preparation method of a heat-insulating and light-blocking window curtain, comprising the following preparation steps:

[0010] (1) The graphene oxide is added into deionized water at a mass ratio of 1:500, ultrasonically dispersed for 1 h at 400-600 W, and then placed in a water bath kettle at 90-200℃ for heating reaction for 2-12 h to obtain graphene oxide hydrogel; the phosphotungstic acid catalyst, carbon black and hydrogen peroxide with a mass ratio of 1:100:600 are mixed and placed in a water bath kettle, heated to 50℃, reacted for 6 h, then filtered, the filtrate is washed with deionized water until the pH of the washing liquid is 7, and dried at a vacuum degree of 0.5-1 Pa and 80℃ for 30 min to obtain the oxidized modified carbon black;

[0011] (2) The deionized water, graphene oxide hydrogel and silver oxide with a mass ratio of 1:6:2-1:8:2 are mixed, stirred at 90-120℃ and 2000-3000 rpm for 10 min to obtain a reaction product, then 200# solvent oil with a mass of 0.25 times that of the reaction product is added, and reacted at 80-120℃ for 20-70 min, then the lower layer water is separated and filtered while hot to obtain a pre-modified hydrogel, then the oxidized modified carbon black with a mass of 0.1-0.2 times that of the pre-modified hydrogel is added, and stirred uniformly to obtain a carbon black modified hydrogel;

[0012] (3) The carbon black modified hydrogel is added into deionized water with a mass of 50-500 times that of the carbon black modified hydrogel, and adsorbed for 24-48 h, then stirred at 200-1000 rpm for 1-3 min, then the polyvinyl alcohol aqueous solution with a concentration of 18 mg / mL and a mass of 0.1 times that of the carbon black modified hydrogel is added, and stirred at 4000-6000 rpm for 4 d to obtain a spinning solution; the spinning solution is discharged into an ethanol bath for cold spinning, the volume ratio of ethanol to liquid nitrogen in the ethanol bath is 1:1, the temperature of the ethanol bath is-100℃, the discharge speed of the spinning solution is 50 mL / h, the inner diameter of the spinning needle is 600-800 μm, and a cold fiber is obtained, which is freeze-dried at-65℃ and a pressure of 4 Pa for 1 h, then placed in deionized water at 80℃ according to a material liquid ratio of 1:2-1:4, washed with water for 12 h, taken out, and dried at room temperature for 6 h to obtain an aerogel fiber, which is woven to obtain an aerogel fabric with a grammage of 500-800 g / m 2 ;

[0013] (4) The environmentally friendly soft glue, foam stabilizer, foaming agent and ammonia water are mixed according to a mass ratio of 50-60:10-15:1-2:0.5-1 to obtain a mixture, and the bamboo charcoal microspheres with a mass of 0.01-0.05 times that of the mixture are added to obtain a base glue; the aerogel fabric layer is immersed and calendered by the base glue, then a tin foil with a thickness of 25-40 μm is attached to one side of the fabric, and dried at 50℃ for 3 h to obtain a tin foil layer window curtain;

[0014] (5) titanium disulfide is hydrolyzed to generate hydroxyl-rich titanium dioxide in an alkaline environment; isophorone diisocyanate, polytetrahydrofuran diol, and 1,4-butanediol are mixed in a mass ratio of 10-15:20-30:0.5-1, and the mixture is stirred at 75-95℃ and 2000-3000r / min for 30-45min to obtain a mixture; 0.005 times the mass of dimethylol propionic acid is added, and stirring is continued for 20-30min; the temperature is lowered to 50-60℃, 0.005 times the mass of triethylamine is added, and reaction is carried out for 15-20min; the temperature is lowered to 30-35℃, and polyurethane is obtained; 0.1-0.2 times the mass of the polyurethane is added to a 0.5% mass fraction hydroxyl-rich titanium dioxide aqueous dispersion, and reaction is carried out for 30min to obtain titanium dioxide modified polyurethane;

[0015] (6) titanium dioxide modified polyurethane, phosphorus-based halogen-free flame-retardant dispersant, foam stabilizer, foaming agent, and ammonia are mixed in a mass ratio of 50-60:20-30:8-15:1-2.2:0.5-1.2 to obtain a face paste slurry, and then a tin foil layer of a tin foil layer window curtain is rolled on one side of the tin foil layer using a squeegee roller, and then electrostatic flocking is carried out on the face paste layer, and the product is dried at 50℃ for 30min to obtain a heat-insulating and light-shielding window curtain; the phosphorus-based halogen-free flame-retardant dispersant comprises the following components in parts by weight: acrylic acid 25-30 parts, aluminum hydroxide 50-55 parts, ammonium polyphosphate 45-55 parts, titanium dioxide 28-44 parts, polyurethane 6-12 parts, deionized water 50-60 parts, polyacrylic acid sodium salt dispersant 0.2-0.8 parts, polyoxyethylene ether wetting agent 0.15-0.35 parts, and alkali-swellable thickener 3-8 parts.

[0016] Further, the particle size of the carbon black in step (1) is 10-100μm, and the concentration of the hydrogen peroxide is 3%-30%.

[0017] Further, the padding process conditions in step (4) are as follows: the production squeegee angle is 90°, the squeegee distance is 60-70s, the foaming ratio is 45-49g, the rolling air pressure is 0.3-0.4MPa, and the speed is 15-20m / min per minute.

[0018] Further, the specific preparation method of the hydroxyl-rich titanium dioxide in step (5) is as follows: urea and a 0.5M titanium sulfate aqueous solution are mixed in a mass ratio of 1:1, and stirring is carried out until the urea is completely dissolved; the solution is then added to an autoclave, the filling degree is 80%, and the temperature is 140-200℃, the pressure is 2.3-5.2MPa, and the holding time is 2-6h; then, filtration is carried out, the filtrate is washed with deionized water until the pH of the filtrate is 7, and the filter cake is dried at 80℃ for 8h.

[0019] Further, the foaming agent in the step (4) and step (6) is one or more of cyclopentane, n-butane; the bubble stabilizer is one or more of fatty alcohol polyoxyethylene ether sodium sulfate, dodecyl dimethyl amine oxide or alkyl alcohol amide.

[0020] Further, the specific process conditions of the coating knife pressure roller in the step (6) are as follows: the coating knife angle is 90-95°, the knife distance is 0.6-0.65 mm, the foaming slurry density is 46-47 g / cm 3 , the foaming ratio is 3-4 times, the pressure roller air pressure is 0.35-0.4 MPa; and the speed of the blank cloth passing through the pressure roller is 15-22 m / min.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] In the preparation of the heat-insulating and light-shielding window curtain, aerogel fibers are used as the outer surface layer, a convex bubble tin foil layer and specially prepared titanium dioxide modified polyurethane are used as the surface adhesive layer, and the flocking technology is used to realize the heat-insulating and light-shielding effect of the window curtain.

[0023] Firstly, the graphene oxide is made into graphene oxide hydrogel, the carbon atoms in the graphene oxide have a large number of π bonds, and the transition can absorb ultraviolet light of a corresponding wavelength, and the oxidized carbon black is added to achieve the light-shielding effect and improve the ultraviolet resistance of the window curtain; the oxidized silver is added, the metal ions react with the free carboxyl groups in the graphene oxide hydrogel to form silver carboxylate through covalent bond or ionic bond, so as to achieve a significant antibacterial effect; the modified graphene oxide hydrogel with carbon black and polyvinyl alcohol are cold spun and thawed to obtain aerogel fibers, which are woven to form a fabric layer, further improving the heat-insulating and antibacterial effect of the window curtain.

[0024] Secondly, the outer surface layer is connected with a primer layer, the bamboo charcoal microsphere particles are added to the raw material to form a primer layer with spherical protrusions; the primer layer is covered with a tin foil heat-insulating and waterproof layer, and the spherical protruding tin foil layer is naturally formed, which can weaken the sound wave and reflected light; the surface adhesive layer covering the tin foil layer is mainly made of titanium dioxide polyurethane; the isophorone diisocyanate, polytetrahydrofuran diol and butanediol are synthesized to form polyurethane; the titanium disulfide is hydrolyzed to generate titanium dioxide rich in hydroxyl groups, the hydroxyl groups react with the isocyanate groups of the polyurethane, and at the same time, the hydroxyl groups are chemically bonded to the hydroxyl groups in the side chain of the polyurethane molecule, so as to be uniformly dispersed therein, so as to obtain titanium dioxide modified polyurethane, and improve the light-shielding and heat-insulating performance. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0026] In order to more clearly illustrate the method provided by the present application, the following embodiments are described in detail. The test methods of various indexes of the heat-insulating and light-shielding window curtain prepared in the following embodiments are as follows:

[0027] Heat insulation performance test: the same size of the embodiments and the comparative examples are taken to test the thermal conductivity according to GB / T35762.

[0028] Antibacterial performance test: the same size of the embodiments and the comparative examples are taken to test the antibacterial rate according to ISO20743.

[0029] Light shielding performance test: the same size of the embodiments and the comparative examples are taken to test the light shielding rate according to T / CTES1012.

[0030] Embodiment 1

[0031] (1) The graphene oxide is added into deionized water at a mass ratio of 1:500, and after ultrasonic dispersion at 400 W for 1 h, it is placed in a 90℃ water bath and heated for 2 h to obtain graphene oxide hydrogel. The phosphotungstic acid catalyst with a mass ratio of 1:100:600, carbon black with a particle size of 10 μm, and 3% hydrogen peroxide solution are mixed and placed in a water bath, heated to 50℃, and reacted for 6 h. After filtration, the filter is washed with deionized water until the pH of the washing liquid is 7, and then dried at a vacuum degree of 0.5 Pa and a temperature of 80℃ for 30 min to obtain oxidized modified carbon black.

[0032] (2) The deionized water, graphene oxide hydrogel and silver oxide are mixed at a mass ratio of 1:6:2, stirred at 90℃ and 2000 rpm for 10 min to obtain a reaction product, and then 200# solvent oil with a mass of 0.25 times that of the reaction product is added. After reaction at 80℃ for 20 min, the lower layer of water is separated and filtered while hot to obtain a pre-modified hydrogel. Then, the oxidized modified carbon black with a mass of 0.1 times that of the pre-modified hydrogel is added and stirred uniformly to obtain a carbon black modified hydrogel.

[0033] (3) The carbon black modified hydrogel is added into 50 times of deionized water by mass of the carbon black modified hydrogel, and after standing and adsorbing for 24 hours, it is stirred at 200 rpm for 1 minute. Then, 0.1 times of polyvinyl alcohol aqueous solution with a concentration of 18 mg / mL by mass of the carbon black modified hydrogel is added, and stirred at 4000 rpm for 4 days to obtain a spinning solution. The spinning solution is discharged into an ethanol bath for freeze spinning, the volume ratio of ethanol to liquid nitrogen in the ethanol bath is 1:1, the temperature of the ethanol bath is -100℃, the discharge speed of the spinning solution is 50 mL / h, and the inner diameter of the spinning needle is 600 μm, to obtain a frozen fiber. Then, the frozen fiber is freeze-dried at -65℃ and a pressure of 4 Pa for 1 hour, and then placed in deionized water at 80℃ at a material liquid ratio of 1:2, and after water washing for 12 hours, it is taken out and dried at room temperature for 6 hours to obtain an aerogel fiber. The aerogel fiber is woven to obtain an aerogel fabric with a grammage of 500 g / m 2 ;

[0034] (4) An environmentally friendly soft glue, a fatty alcohol polyoxyethylene ether sodium sulfate, a cyclopentane, and ammonia are mixed at a mass ratio of 50:10:1:0.5 to obtain a mixture. The mixture is stirred uniformly, and 0.01 times of bamboo charcoal microspheres by mass of the mixture is added to obtain a bottom glue. The aerogel fabric layer is impregnated with the bottom glue to produce a tin foil layer curtain, with a coating knife angle of 90°, a knife distance of 60 s, a foaming ratio of 45 g, a roller air pressure of 0.3 MPa, and a speed of 15 m / min per minute.

[0035] (5) Urea and a 0.5 M titanium sulfate aqueous solution are mixed at a mass ratio of 1:1, and after stirring until the urea is completely dissolved, the solution is added to an autoclave with a filling degree of 80%. After being kept at a temperature of 140℃ and a pressure of 2.3 MPa for 2 hours, the solution is filtered, washed with deionized water until the pH of the filtrate is 7, and dried at 80℃ for 8 hours to obtain hydroxyl-rich titanium dioxide. Isophorone diisocyanate, polytetrahydrofuran diol, and 1,4-butanediol are mixed at a mass ratio of 10:20:0.5, and after being stirred at 75℃ and 2000 r / min for 30 minutes, 0.005 times of dimethylol propionic acid by mass of the mixture is added, and stirring is continued for 20 minutes. After being cooled to 50℃, 0.005 times of triethylamine by mass of the mixture is added, and reaction is carried out for 15 minutes. After being cooled to 30℃, polyurethane is obtained. 0.1 times of a hydroxyl-rich titanium dioxide dispersion liquid with a mass fraction of 0.5% by mass of the polyurethane is added, and reaction is carried out for 30 minutes to obtain titanium dioxide modified polyurethane.

[0036] (6) Titanium dioxide modified polyurethane, a phosphorus-based halogen-free flame-retardant dispersant, a fatty alcohol polyoxyethylene ether sodium sulfate, cyclopentane, and ammonia are mixed at a mass ratio of 50:20:8:1:0.5 to obtain a face paste slurry. Then, a coating knife roller is used, with a coating knife angle of 90°, a knife distance of 0.6 mm, and a foaming slurry density of 46 g / cm 3, the foaming ratio is 3 times, the pressure roller air pressure is 0.35MPa; the speed of the base cloth passing through the pressure roller is 15m / min, the surface paste slurry is rolled on the tin foil layer side of the tin foil layer window curtain, and then the surface paste layer is electrostatically flocked outside, dried at 50 DEG C for 30min to obtain the heat insulation and shading window curtain; the phosphorus-based halogen-free flame-retardant dispersant comprises the following components in parts by weight: acrylic acid 25 parts, aluminum hydroxide 50 parts, ammonium polyphosphate 45 parts, titanium dioxide 28 parts, polyurethane 6 parts, deionized water 50 parts, polyacrylic acid sodium salt dispersant 0.2 parts, polyoxyethylene ether wetting agent 0.15 parts, alkali swelling thickener 3 parts.

[0037] Example 2

[0038] (1) The graphene oxide is added into deionized water at a mass ratio of 1:500, ultrasonically dispersed for 1h at 500W, and then placed in a 145 DEG C water bath to heat and react for 7h to obtain graphene oxide hydrogel; the phosphotungstic acid catalyst, carbon black with a particle size of 55μm, and hydrogen peroxide with a concentration of 16.5% are mixed at a mass ratio of 1:100:600, and then placed in a water bath to heat to 50 DEG C and react for 6h; after filtration, the filter is washed with deionized water until the pH of the washing liquid is 7, and then dried at a vacuum degree of 0.75Pa and a temperature of 80 DEG C for 30min to obtain oxidized modified carbon black;

[0039] (2) The deionized water, graphene oxide hydrogel, and silver oxide are mixed at a mass ratio of 1:7:2, stirred at 105 DEG C and 2500rpm for 10min to obtain a reaction product, 200# solvent oil is added in an amount of 0.25 times the mass of the reaction product, and then reacted at 100 DEG C for 45min; after the lower layer of water is separated, the pre-modified hydrogel is obtained by hot filtration; then, the oxidized modified carbon black is added in an amount of 0.15 times the mass of the pre-modified hydrogel, and the carbon black modified hydrogel is obtained after uniform stirring;

[0040] (3) The carbon black modified hydrogel is added into deionized water in an amount of 275 times the mass of the carbon black modified hydrogel, and then allowed to stand for 36h to adsorb; after stirring at 600rpm for 2min, the polyvinyl alcohol aqueous solution with a concentration of 18mg / mL is added in an amount of 0.1 times the mass of the carbon black modified hydrogel, and then stirred at 5000rpm for 4d to obtain a spinning solution; the spinning solution is discharged into an ethanol bath for cold spinning, the volume ratio of ethanol to liquid nitrogen in the ethanol bath is 1:1, the temperature of the ethanol bath is-100 DEG C, the discharge speed of the spinning solution is 50mL / h, and the inner diameter of the spinning needle is 700μm; the cold fiber is obtained, and then dried at-65 DEG C and a pressure of 4Pa for 1h; then, the cold fiber is placed in deionized water at 80 DEG C at a material liquid ratio of 1:3, and then washed for 12h; after being taken out, the cold fiber is dried at room temperature for 6h to obtain aerogel fiber; after weaving, the aerogel fabric with a grammage of 650g / m 2 is obtained.

[0041] (4) mixing the environment-friendly soft glue, dodecyl dimethyl amine oxide, cyclopentane and ammonia water according to the mass ratio of 55:12.5:1.5:0.75, stirring uniformly to obtain a mixture, adding 0.03 times of the mass of the mixture of bamboo charcoal microspheres to obtain a bottom glue; the aerogel fabric layer is immersed and rolled by the bottom glue to produce a tin foil layer curtain with a coating knife angle of 90°, a knife distance of 65s, a foaming ratio of 47g, a rolling air pressure of 0.35MPa and a speed of 17.5m / min, then a tin foil with a thickness of 32.5μm is attached to one side of the fabric, and the tin foil layer curtain is dried at 50℃ for 3h;

[0042] (5) mixing urea and a 0.5M titanium sulfate aqueous solution according to the mass ratio of 1:1, stirring until the urea is completely dissolved, then adding the solution into an autoclave with a filling degree of 80%, and then keeping the temperature at 170℃ and the pressure at 3.75MPa for 4h, filtering, washing the filter with deionized water until the pH of the filtrate is 7, and drying at 80℃ for 8h to obtain hydroxyl-rich titanium dioxide; mixing isophorone diisocyanate, polytetrahydrofuran diol and 1,4-butanediol according to the mass ratio of 12.5:25:0.75, stirring at 85℃ and 2500r / min for 37.5min to obtain a mixture, adding 0.005 times of the mass of the mixture of dimethylol propionic acid, continuing to stir for 25min, cooling to 55℃, adding 0.005 times of the mass of the mixture of triethylamine, reacting for 17.5min, cooling to 32.5℃ to obtain polyurethane, adding 0.15 times of the mass of the polyurethane of a 0.5% mass fraction hydroxyl-rich titanium dioxide aqueous dispersion, and reacting for 30min to obtain titanium dioxide modified polyurethane;

[0043] (6) mixing the titanium dioxide modified polyurethane, the phosphorus-based halogen-free flame-retardant dispersant, dodecyl dimethyl amine oxide, cyclopentane and ammonia water according to the mass ratio of 55:25:11.5:1.8:0.85 to obtain a face paste slurry, then using a coating knife roller with a coating knife angle of 92.5°, a knife distance of 0.625mm, a foaming slurry density of 46.5g / cm 3 , a foaming ratio of 3.5 times and a rolling air pressure of 0.375MPa, and rolling the face paste slurry on one side of the tin foil layer of the tin foil layer curtain, and then electrostatic flocking the face paste layer at 50℃ for 30min to obtain a heat-insulating and light-blocking curtain; the phosphorus-based halogen-free flame-retardant dispersant comprises the following components in parts by weight: acrylic acid 27.5 parts, aluminum hydroxide 52.5 parts, ammonium polyphosphate 50 parts, titanium dioxide 36 parts, polyurethane 9 parts, deionized water 55 parts, polyacrylic acid sodium salt dispersant 0.5 parts, polyoxyethylene ether wetting agent 0.25 parts, and alkali swelling thickener 5.5 parts.

[0044] Example 3

[0045] (1) The graphene oxide is added into deionized water at a mass ratio of 1:500, ultrasonically dispersed for 1 h at 600 W, and then placed in a water bath at 200℃ for heating reaction for 12 h to obtain graphene oxide hydrogel; the phosphotungstic acid catalyst, carbon black with a particle size of 100 μm, and 30% hydrogen peroxide solution are mixed at a mass ratio of 1:100:600, heated to 50℃ in a water bath, reacted for 6 h, then filtered, and the filter is washed with deionized water until the pH of the washing liquid is 7, and then dried at a vacuum degree of 1 Pa and at 80℃ for 30 min to obtain oxidized modified carbon black;

[0046] (2) The deionized water, graphene oxide hydrogel, and silver oxide are mixed at a mass ratio of 1:8:2, stirred at 120℃ and 3000 rpm for 10 min to obtain a reaction product, 200# solvent oil is added in an amount of 0.25 times the mass of the reaction product, and then the mixture is reacted at 120℃ for 70 min, after which the lower layer of water is separated, and the pre-modified hydrogel is obtained by hot filtration; then, the oxidized modified carbon black is added in an amount of 0.2 times the mass of the pre-modified hydrogel, and the mixture is stirred to obtain a carbon black modified hydrogel;

[0047] (3) The carbon black modified hydrogel is added into deionized water in an amount of 500 times the mass of the carbon black modified hydrogel, and then allowed to stand for 48 h for adsorption, after which the mixture is stirred at 1000 rpm for 3 min, and then polyvinyl alcohol solution with a concentration of 18 mg / mL is added in an amount of 0.1 times the mass of the carbon black modified hydrogel, and the mixture is stirred at 6000 rpm for 4 d to obtain a spinning solution; the spinning solution is discharged into an ethanol bath for cold spinning, the volume ratio of ethanol to liquid nitrogen in the ethanol bath is 1:1, the temperature of the ethanol bath is -100℃, the discharge speed of the spinning solution is 50 mL / h, and the inner diameter of the spinning needle is 800 μm, to obtain a cold fiber, which is then freeze-dried at -65℃ and a pressure of 4 Pa for 1 h, and then placed in deionized water at 80℃ at a material liquid ratio of 1:4, and then washed with water for 12 h, after which the fiber is taken out and dried at room temperature for 6 h to obtain an aerogel fiber, which is woven to obtain an aerogel fabric with a grammage of 800 g / m 2 ;

[0048] (4) The environmentally friendly soft glue, alkyl alcohol amide, n-butane, and ammonia are mixed at a mass ratio of 60:15:2:1 to obtain a mixture, and then bamboo charcoal microspheres are added in an amount of 0.05 times the mass of the mixture to obtain a primer; the aerogel fabric layer is impregnated with the primer, and then coated at a knife angle of 90°, a knife distance of 70 s, a foaming ratio of 49 g, and a roller air pressure of 0.4 MPa at a speed of 20 m / min, and then a tin foil with a thickness of 40 μm is attached to one side of the fabric, and then dried at 50℃ for 3 h to obtain a tin foil layer window curtain;

[0049] (5) urea, 0.5M titanium sulfate aqueous solution were mixed in a mass ratio of 1:1, after stirring until the urea was completely dissolved, the solution was added to an autoclave, the filling degree was 80%, after incubation at a temperature of 200℃ and a pressure of 5.2MPa for 6h, filtration was performed, the filtrate was washed with deionized water until the pH of the filtrate was 7, and then dried at 80℃ for 8h to obtain hydroxyl-rich titanium dioxide; isophorone diisocyanate, polytetrahydrofuran diol, and 1,4-butanediol were mixed in a mass ratio of 15:30:1, and the mixture was stirred at 95℃ and 3000r / min for 45min to obtain a reaction mixture, 0.005 times the mass of the reaction mixture of dimethylol propionic acid was added, and stirring was continued for 30min, the temperature was lowered to 60℃, 0.005 times the mass of the reaction mixture of triethylamine was added, and the reaction was carried out for 20min, the temperature was lowered to 35℃, and polyurethane was obtained, 0.2 times the mass of the polyurethane of 0.5% hydroxyl-rich titanium dioxide aqueous dispersion was added, and the reaction was carried out for 30min to obtain titanium dioxide modified polyurethane;

[0050] (6) The titanium dioxide modified polyurethane, the phosphorus-based halogen-free flame-retardant dispersant, the alkylolamide, the n-butane, and the ammonia were mixed in a mass ratio of 60:30:15:2.2:1.2 to obtain a face paste slurry, and then a coating knife pressure roller was used, the coating knife angle was 95°, the knife distance was 0.65mm, the foaming paste density was 47g / cm 3 , the foaming ratio was 4 times, and the pressure roller air pressure was 0.4MPa; the speed of the base cloth passing through the pressure roller was 22m / min, the face paste slurry was rolled on one side of the tin foil layer of the tin foil layer window curtain, and then electrostatic flocking was performed on the outside of the face paste layer, and the curtain was dried at 50℃ for 30min to obtain a heat-insulating and light-shielding window curtain; the phosphorus-based halogen-free flame-retardant dispersant included the following components in parts by weight: acrylic acid 30 parts, aluminum hydroxide 55 parts, ammonium polyphosphate 55 parts, titanium dioxide 44 parts, polyurethane 12 parts, deionized water 60 parts, polyacrylic acid sodium salt dispersant 0.8 parts, polyoxyethylene ether wetting agent 0.35 parts, and alkali swelling thickener 8 parts.

[0051] Comparative Example 1

[0052] The difference between Comparative Example 1 and Example 2 is that step (1) is not included, and step (2) is changed to: graphene oxide was added to deionized water in a mass ratio of 1:500, and after ultrasonic dispersion at 500W for 1h, it was placed in a 145℃ water bath and heated for 7h to obtain graphene oxide hydrogel; deionized water, graphene oxide hydrogel, and silver oxide were mixed in a mass ratio of 1:7:2, and after stirring at 105℃ and 2500rpm for 10min, a reaction mixture was obtained, 0.25 times the mass of the reaction mixture of 200# solvent oil was added, and after reaction at 100℃ for 45min, the lower layer of water was separated, and the pre-modified hydrogel was obtained by hot filtration. The remaining steps are the same as those of Example 2.

[0053] Comparative Example 2

[0054] The difference between Comparative Example 2 and Example 2 is that step (2) is different, step (2) is changed to: adding 0.15 times the mass of the oxidized modified carbon black to the graphene oxide hydrogel, stirring uniformly to obtain a carbon black modified hydrogel. The remaining steps are the same as Example 2.

[0055] Comparative Example 3

[0056] (1) The graphene oxide was added to deionized water at a mass ratio of 1:500, and after ultrasonic dispersion at 500W for 1h, a graphene oxide aqueous solution was obtained; the phosphotungstic acid catalyst, carbon black with a particle size of 55μm, and hydrogen peroxide with a concentration of 16.5% were mixed at a mass ratio of 1:100:600 and placed in a water bath, heated to 50℃, reacted for 6h, then filtered, and the filtrate was washed with deionized water until the pH of the washing liquid was 7, dried at a vacuum degree of 0.75Pa and a temperature of 80℃ for 30min, and the oxidized modified carbon black was obtained;

[0057] (2) The deionized water, graphene oxide aqueous solution, and silver oxide were mixed at a mass ratio of 1:7:2, stirred at 105℃ and 2500rpm for 10min to obtain a reaction product, then 0.25 times the mass of the reaction product was added to 200# solvent oil, reacted at 100℃ for 45min, then the lower layer of water was separated, filtered while hot to obtain a pre-modified aqueous solution, then 0.15 times the mass of the pre-modified aqueous solution was added to the oxidized modified carbon black, and the carbon black modified aqueous solution was obtained by stirring uniformly;

[0058] (3) The carbon black modified graphene oxide aqueous solution was added to polyvinyl alcohol aqueous solution with a concentration of 18mg / mL at a mass ratio of 0.1:1, and stirred at 5000rpm for 4d to obtain a spinning solution; the carbon black modified graphene oxide fiber was obtained by wet spinning the spinning solution, and woven to obtain a fabric with a weight of 650g / m 2 ;

[0059] (4) The environmentally friendly soft glue, dodecyl dimethyl amine oxide foam stabilizer, cyclopentane foaming agent, and ammonia were mixed at a mass ratio of 55:12.5:1.5:0.75 to obtain a mixture, and the mixture was added to bamboo charcoal microspheres at a mass ratio of 0.03:1 to obtain a primer; the fabric layer was immersed and rolled in the primer, and the fabric was produced at a coating knife angle of 90°, a knife distance of 65s, a foaming ratio of 47g, a roller air pressure of 0.35MPa, and a speed of 17.5m / min, then a tin foil with a thickness of 32.5μm was attached to one side of the fabric, and the tin foil layer curtain was obtained by drying at 50℃ for 3h;

[0060] (5) mixing urea and 0.5M titanium sulfate aqueous solution with a mass ratio of 1:1, stirring until the urea is completely dissolved, then adding the solution into an autoclave with a filling degree of 80%, and keeping the temperature at 170℃ and the pressure at 3.75MPa for 4h, then filtering, washing the filter with deionized water until the pH of the filtrate is 7, and drying at 80℃ for 8h to obtain hydroxyl-rich titanium dioxide; mixing isophorone diisocyanate, polytetrahydrofuran diol, and 1,4-butanediol with a mass ratio of 12.5:25:0.75, stirring at 85℃ and 2500r / min for 37.5min to obtain a mixture, adding 0.005 times the mass of the mixture of dimethylol propionic acid, and continuing to stir for 25min, then cooling to 55℃, adding 0.005 times the mass of the mixture of triethylamine, and reacting for 17.5min, then cooling to 32.5℃ to obtain polyurethane, adding 0.15 times the mass of the polyurethane of 0.5% hydroxyl-rich titanium dioxide aqueous dispersion, and reacting for 30min to obtain titanium dioxide modified polyurethane;

[0061] (6) mixing titanium dioxide modified polyurethane, phosphorus-based halogen-free flame-retardant dispersant, dodecyl dimethyl amine oxide foam stabilizer, cyclopentane foaming agent, and ammonia with a mass ratio of 55:25:11.5:1.8:0.85 to obtain a face paste slurry, then using a coating knife pressure roller with a coating knife angle of 92.5°, a knife distance of 0.625mm, a foaming paste density of 46.5g / cm 3 , a foaming ratio of 3.5 times, and a pressure roller air pressure of 0.375MPa, and rolling the face paste slurry on one side of a tin foil layer of a tin foil layer window curtain, then electrostatic flocking outside the face paste layer, and drying at 50℃ for 30min to obtain a heat-insulating and light-blocking window curtain; the phosphorus-based halogen-free flame-retardant dispersant comprises the following components in parts by weight: acrylic acid 27.5 parts, aluminum hydroxide 52.5 parts, ammonium polyphosphate 50 parts, titanium dioxide 36 parts, polyurethane 9 parts, deionized water 55 parts, polyacrylic acid sodium salt dispersant 0.5 parts, polyoxyethylene ether wetting agent 0.25 parts, and alkali swelling thickener 5.5 parts.

[0062] Comparative Example 4

[0063] Comparative Example 4 differs from Example 2 in that step (4) is changed to: mixing environmentally friendly soft glue, dodecyl dimethyl amine oxide, cyclopentane, and ammonia with a mass ratio of 55:12.5:1.5:0.75 to obtain a mixture, and then using the mixture to dip and roll a aerogel fabric layer to produce a coating knife angle of 90°, a knife distance of 65s, a foaming ratio of 47g, a roller air pressure of 0.35MPa, and a speed of 17.5m / min, then laminating a tin foil with a thickness of 32.5μm on one side of the fabric, and drying at 50℃ for 3h to obtain a tin foil layer window curtain. The remaining steps are the same as those of Example 2.

[0064] Comparative Example 5

[0065] Comparative Example 5 differs from Example 2 in steps (5) and (6). In step (5), isophorone diisocyanate, polytetrahydrofuran diol, and 1,4-butanediol are mixed in a mass ratio of 12.5:25:0.75, and the mixture is stirred at 85°C and 2500 r / min for 37.5 min to obtain a mixture. Then, 0.005 times the mass of the mixture of dimethylol propionic acid is added, and stirring is continued for 25 min. The temperature is lowered to 55°C, 0.005 times the mass of the mixture of triethylamine is added, and reaction is continued for 17.5 min. The temperature is lowered to 32.5°C to obtain a polyurethane. In step (6), the polyurethane, the phosphorus-based halogen-free flame-retardant dispersant, dodecyl dimethyl amine oxide, cyclopentane, and ammonia are mixed in a mass ratio of 55:25:11.5:1.8:0.85 to obtain a face paste slurry. Then, a coating knife is used to press the paste slurry, the coating knife angle is 92.5°, the knife distance is 0.625 mm, the foaming paste density is 46.5 g / cm 3 , the foaming ratio is 3.5 times, and the pressure of the press roller is 0.375 MPa. The speed of the base cloth passing through the press roller is 18.5 m / min. The face paste slurry is pressed on the tin foil layer of the tin foil layer window curtain, and then electrostatic flocking is performed on the outside of the face paste layer. Drying is performed at 50°C for 30 min to obtain a heat-insulating and light-shielding window curtain. The phosphorus-based halogen-free flame-retardant dispersant includes the following components in parts by weight: acrylic acid 27.5 parts, aluminum hydroxide 52.5 parts, ammonium polyphosphate 50 parts, titanium dioxide 36 parts, polyurethane 9 parts, deionized water 55 parts, polyacrylic acid sodium salt dispersant 0.5 parts, polyoxyethylene ether wetting agent 0.25 parts, alkali swelling thickener 5.5 parts. The remaining steps are the same as those in Example 2.

[0066] Effect Example

[0067] The performance analysis results of the heat-insulating and light-shielding window curtains obtained by using Examples 1 to 3 and Comparative Examples 1 to 5 of the present application are shown in Table 1 below.

[0068] Table 1

[0069]

[0070]

[0071] From the heat conductivity coefficient experimental data comparison of the examples and the comparative examples, it can be found that the graphene oxide aerogel used in the application has obvious heat insulation effect, and the added carbon black and titanium dioxide also effectively improve the heat insulation effect of the curtain; From the antibacterial coefficient experimental data comparison of the examples and the comparative examples, it can be found that the addition of silver oxide, the metal ions react with the free carboxyl groups in the graphene oxide hydrogel through covalent bond or ionic bond to generate silver carboxylate, achieving significant antibacterial effect, and the bamboo charcoal microsphere particles and the hydroxyl-rich titanium dioxide also have certain antibacterial property; From the light shading degree experimental data comparison of the examples and the comparative examples, it can be found that the graphene oxide aerogel is formed after the graphene oxide is foamed, the carbon atoms in the graphene oxide have a large number of π bonds, and the transition can absorb ultraviolet light of a specific wavelength, and the addition of carbon black oxide plays a light shielding effect and improves the ultraviolet resistance of the curtain; The spherical convex tin foil layer effectively reflects a large amount of light, and plays a good light shielding effect; The hydroxyl groups in the hydroxyl-rich titanium dioxide react with the isocyanate groups of the polyurethane, and at the same time, are chemically bonded with the hydroxyl groups in the side chain of the polyurethane molecule, so as to be uniformly dispersed therein, obtaining titanium dioxide modified polyurethane, improving the light shielding and heat insulation performance; The carbon black modified graphene oxide hydrogel is frozen and thawed, and the carbon black modified graphene oxide aerogel is obtained, which has good heat insulation and antibacterial effect.

[0072] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any mark in the claims should not be considered as limiting the involved claims.

Claims

1. A method for preparing a heat-insulating and light-blocking curtain, characterized in that, The preparation steps include the following: (1) Add graphene oxide to deionized water at a mass ratio of 1:500, disperse it by ultrasonication at 400~600W for 1h, and then place it in a water bath at 90℃-200℃ and heat it for 2-12h to obtain graphene oxide hydrogel; mix phosphotungstic acid catalyst, carbon black and hydrogen peroxide at a mass ratio of 1:100:600 and place them in a water bath, heat them to 50℃, react them for 6h, filter them, take the filter, wash them with deionized water until the pH of the washing solution is 7, dry them at 80℃ under vacuum of 0.5~1Pa for 30min to obtain oxidized modified carbon black; (2) Mix deionized water, graphene oxide hydrogel and silver oxide in a mass ratio of 1:6:2~1:8:2, stir at 90℃~120℃ and 2000-3000rpm for 10min to obtain the reactant, then add 0.25 times the mass of the reactant of No. 200 solvent oil, react at 80~120℃ for 20~70min, separate the lower layer of water, filter while hot to obtain pre-modified hydrogel, then add 0.1-0.2 times the mass of the pre-modified hydrogel of oxidized modified carbon black, stir evenly to obtain carbon black modified hydrogel; (3) Add 50-500 times the mass of carbon black modified hydrogel to deionized water, let it stand for adsorption for 24-48 hours, then stir at 200-1000 rpm for 1-3 minutes. Add 0.1 times the mass of carbon black modified hydrogel to a polyvinyl alcohol aqueous solution with a concentration of 18 mg / mL, and stir at 4000-6000 rpm for 4 days to obtain the spinning solution. Place the spinning solution into an ethanol bath for freeze spinning. The volume of ethanol and liquid nitrogen in the ethanol bath is... The ratio of the spinning solution to the ethanol bath is 1:1, the temperature of the ethanol bath is -100℃, the discharge rate of the spinning solution is 50mL / h, and the inner diameter of the spinning needle is 600-800μm. Frozen fibers are obtained, which are then freeze-dried at -65℃ and 4Pa for 1h. The fibers are then placed in deionized water at 80℃ at a ratio of 1:2 to 1:4 and washed for 12h. After washing, the fibers are removed and dried at room temperature for 6h to obtain aerogel fibers. The fibers are then woven to obtain aerogel fabric with a basis weight of 500-800g / m2. (4) Mix environmentally friendly soft glue, foam stabilizer, foaming agent and ammonia water in a mass ratio of 50-60:10-15:1-2:0.5-1, stir evenly to obtain a mixture, add 0.01~0.05 times the mass of bamboo charcoal microspheres to obtain a base adhesive; impregnate the aerogel fabric layer with the base adhesive, and then attach a tin foil with a thickness of 25μm-40μm to one side of the fabric, and dry at 50℃ for 3h to obtain a tin foil layer curtain; (5) Titanium disulfide is hydrolyzed in an alkaline environment to generate hydroxyl-rich titanium dioxide; isophorone diisocyanate, polytetrahydrofuran diol and 1,4-butanediol are mixed in a mass ratio of 10-15:20-30:0.5-1, and stirred at 75-95℃ and 2000-3000r / min for 30-45min to obtain a mixture. 0.005 times the mass of the mixture of dimethylolpropionic acid is added, and the mixture is stirred for another 20-30min. The temperature is lowered to 50-60℃, and 0.005 times the mass of the mixture of triethylamine is added. The mixture is reacted for 15-20min, and the temperature is lowered to 30-35℃ to obtain polyurethane. 0.1-0.2 times the mass of the polyurethane of a 0.5% hydroxyl-rich titanium dioxide aqueous dispersion is added, and the mixture is reacted for 30min to obtain titanium dioxide modified polyurethane. (6) Titanium dioxide modified polyurethane, phosphorus-based halogen-free flame retardant dispersant, foam stabilizer, foaming agent, and ammonia are mixed in a mass ratio of 50-60:20-30:8-15:1-2.2:0.5-1.2 to obtain a surface paste. Then, a coating knife and roller are used to press the surface paste onto one side of the tin foil layer of the tin foil curtain. The speed of the roller is 15-22 m / min. Then, electrostatic flocking is applied to the outside of the surface paste layer, and the mixture is dried at 50℃ for 30 min. A heat-insulating and light-blocking curtain is obtained; the phosphorus-based halogen-free flame-retardant dispersant, by weight, comprises the following components: 25-30 parts acrylic acid, 50-55 parts aluminum hydroxide, 45-55 parts ammonium polyphosphate, 28-44 parts titanium dioxide, 6-12 parts polyurethane, 50-60 parts deionized water, 0.2-0.8 parts sodium polyacrylate dispersant, 0.15-0.35 parts polyoxyethylene ether wetting agent, and 3-8 parts alkali-swellable thickener.

2. The method for preparing a heat-insulating and light-blocking curtain according to claim 1, characterized in that, The carbon black in step (1) has a particle size of 10-100 μm and a hydrogen peroxide concentration of 3%-30%.

3. The method for preparing a heat-insulating and light-blocking curtain according to claim 1, characterized in that, The impregnation process conditions in step (4) are as follows: the production coating blade angle is 90°, the blade distance is 60-70s, the foaming ratio is 45-49g, the roll air pressure is 0.3-0.4MPa, and the speed is 15-20m / min.

4. The method for preparing a heat-insulating and light-blocking curtain according to claim 1, characterized in that, The specific preparation method of the hydroxyl-rich titanium dioxide in step (5) is as follows: urea and 0.5M titanium sulfate aqueous solution are mixed at a mass ratio of 1:1 and stirred until the urea is completely dissolved. The solution is then added to a high-pressure reactor with a filling degree of 80%. The reactor is kept at a temperature of 140-200℃ and a pressure of 2.3-5.2MPa for 2-6 hours, filtered, and the filter material is washed with deionized water until the pH of the filtrate is 7. The filtrate is then dried at 80℃ for 8 hours.

5. The method for preparing a heat-insulating and light-blocking curtain according to claim 1, characterized in that, The foaming agent in steps (4) and (6) is one or more of cyclopentane and n-butane; the foam stabilizer is one or more of fatty alcohol polyoxyethylene ether sulfate, dodecyl dimethylamine oxide or alkyl alcohol amide.

6. The method for preparing a heat-insulating and light-blocking curtain according to claim 1, characterized in that, The specific process conditions for the coating blade roller in step (6) are as follows: the coating blade angle is 90-95°, the blade distance is 0.6-0.65mm, and the foaming slurry density is 46-47g / cm³. 3 The foaming ratio is 3-4 times, and the air pressure of the pressure roller is 0.35-0.4MPa.

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