Anti-ultraviolet antistatic fabric and preparation method thereof

Abstract

The invention discloses an anti-ultraviolet antistatic fabric and a preparation method thereof, and relates to the technical field of functional textile materials. The fabric is made of anti-ultraviolet and anti-static polyester fibers through a multifunctional flat knitting machine. When the anti-ultraviolet antistatic polyester fiber is prepared, sodium lignosulfonate and graphene oxide react to prepare modified graphene oxide; mixing and spinning the modified graphene oxide and polyester powder in proportion to obtain modified polyester fibers; the preparation method comprises the following steps: modifying cerium oxide by silane, and compounding the modified cerium oxide with waterborne polyurethane to prepare a modified cerium oxide nano-particle emulsion; grafting and coating the modified cerium oxide nanoparticle emulsion to the surface of the modified polyester fiber, and drying to obtain the anti-ultraviolet antistatic polyester fiber. The fabric provided by the invention has excellent ultraviolet radiation resistance, antistatic property and washable property.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of functional textile materials, in particular to an anti-ultraviolet and anti-static fabric and a preparation method thereof. BACKGROUND

[0002] Polyester fibers have become one of the most widely used synthetic fibers in the textile field due to their high strength, good wear resistance, easy processing and low cost, and are widely used in outdoor sports wear, protective work clothes, tents and sunshades and other products. However, polyester fibers have poor anti-ultraviolet ability, and long-term exposure to ultraviolet light can cause fabric aging, brittle damage and discoloration; meanwhile, the static accumulation problem caused by the hydrophobicity of polyester fibers can easily attract dust and cause electric spark, which poses a safety hazard in clean environments such as medical and electronic environments.

[0003] In recent years, with the rapid growth of outdoor industry and special protection demand, the application of polyester fabric in extreme light and dry environment has surged. Although traditional finishing functional coating can improve the performance in the short term, it has problems such as easy shedding of functional components, hardening of hand feeling and environmental pollution, and it is difficult to meet the dual requirements of long-term protection and green manufacturing. Therefore, it is necessary to modify the polyester fiber itself to simultaneously improve the anti-ultraviolet durability and environmentally friendly anti-static ability of the polyester fabric. SUMMARY

[0004] The purpose of the present application is to provide an anti-ultraviolet and anti-static fabric 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 solutions:

[0006] An anti-ultraviolet and anti-static fabric is prepared from anti-ultraviolet and anti-static polyester fibers by a multifunctional flat knitting machine.

[0007] As an optimization, the anti-ultraviolet and anti-static polyester fibers are prepared by grafting a modified cerium oxide nanoparticle emulsion onto the surface of modified polyester fibers.

[0008] As an optimization, the modified cerium oxide nanoparticle emulsion is prepared by reacting cerium oxide and gamma-aminopropyl triethoxysilane and then compounding with water-based polyurethane.

[0009] As an optimization, the modified polyester fibers are prepared by mixing and spinning modified graphene oxide and polyester.

[0010] As an optimization, the modified graphene oxide is polymerized from sodium lignosulfonate and graphene oxide.

[0011] A preparation method of an anti-ultraviolet and anti-static fabric. The preparation method comprises the following preparation steps:

[0012] (1) mixing the graphene oxide and the phosphate buffer solution uniformly at a mass ratio of 1: (800-1200), and then ultrasonicating for 2-4 h at 20-40℃ and an ultrasonic power of 200-500 W to form a uniform graphene oxide dispersion liquid; mixing the sodium lignosulfonate and deionized water at a mass ratio of 1:10-20, and then stirring at 40-60℃ and 200-400 r / min for 0.5-1 h until the sodium lignosulfonate is completely dissolved; heating the graphene oxide dispersion liquid to 60-80℃, stirring at 200-400 r / min, and then adding the sodium lignosulfonate solution drop by drop, wherein the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.05-0.25, and then reacting for 4-8 h to obtain a modified graphene oxide solution; washing with deionized water by centrifugation for 3-5 times until the pH of the supernatant is 6-8, removing the supernatant, and then preparing the modified graphene oxide;

[0013] (2) grinding the polyester chip into polyester powder, mixing the modified graphene oxide and the polyester powder uniformly at a mass ratio of 1:5-25, and then adding into a screw extruder for extrusion and pelletization to prepare modified polyester pellets; drying the modified polyester pellets at 100-120℃ for 12-24 h, and then performing spinning by a melt spinning method, wherein the spinning temperature is 275-282℃, the gear pump speed is 13-17 rpm, the winding speed is 2300-2500 m / min, and the roller speed is 2350-2550 m / min, to prepare modified polyester fibers;

[0014] (3) dispersing cerium oxide powder in anhydrous ethanol solution at a mass fraction of 4%-7%, adding γ-aminopropyltriethoxysilane at a mass ratio of 1:3-7 to the cerium oxide, stirring at 70-90℃ and 200-400 r / min for 2-3 h, filtering, and then vacuum drying at 60-75℃ for 12-24 h to prepare modified cerium oxide nanoparticles; and preparing a modified cerium oxide nanoparticle emulsion by compounding the modified cerium oxide nanoparticles with water-based polyurethane;

[0015] (4) immersing the modified polyester fibers in the modified cerium oxide nanoparticle emulsion, stirring at 50-90℃ and 200-400 r / min for 1-5 h, and then drying at 100-120℃ for 30-60 min to prepare an ultraviolet-proof and antistatic polyester fiber; and obtaining ultraviolet-proof and antistatic fabrics with different specifications by a multifunctional flat knitting machine.

[0016] As an optimization, the graphene oxide in step (1) is an industrial grade from Nanjing Xianfeng Nanometer Material; the phosphate buffer solution has a pH of 7.2-7.4 and is from Shanghai Maikelin Biochemical Technology Co., Ltd.; and the sodium lignosulfonate is from Tianjin Yezhi Chemical Technology Co., Ltd.

[0017] As an optimization, the polyester in step (2) is a spinning grade polyethylene terephthalate, and the manufacturer is Jiangsu Sircl Group Co., Ltd.

[0018] As optimization, the preparation method of the modified cerium oxide nanoparticle composite emulsion in step (3) is: dispersing the modified cerium oxide nanoparticles in 10%-20% ethanol solution at a mass fraction of 2%-10%, adding water-based polyurethane with a mass ratio of 1:2-5 to the modified cerium oxide nanoparticles, treating at 25-40°C for 20-40 min under an ultrasonic power of 300-500 W, and obtaining the modified cerium oxide nanoparticle composite emulsion.

[0019] As optimization, the solid content of the water-based polyurethane in step (3) is 40%, and the manufacturer is Anhui Andatai New Material Co., Ltd.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] In the preparation of the anti-ultraviolet antistatic fabric, the sodium lignosulfonate is reacted with graphene oxide to obtain modified graphene; the modified graphene is mixed with polyester powder to spin modified polyester fibers; the silane-modified cerium oxide is compounded with water-based polyurethane to form an emulsion, which is fixed on the surface of the modified polyester fibers by grafting coating, and then an anti-ultraviolet antistatic fabric is prepared by a flat knitting machine.

[0022] Firstly, the sulfonic acid groups of the sodium lignosulfonate effectively prevent the agglomeration of graphene oxide nanosheets, so that a uniform and stable dispersion liquid is formed, and the ionic conductivity of the graphene oxide is significantly improved. At the same time, the phenolic hydroxyl groups rich in the molecular structure of the sodium lignosulfonate endow it with excellent antioxidant properties. The modified graphene oxide is mixed with polyester powder in a certain proportion to spin, forming a continuous conductive network in the fiber, so that the fabric obtains permanent antistatic properties, overcoming the defect that traditional antistatic agents are easy to migrate.

[0023] Secondly, the surface of the cerium oxide nanoparticles is modified by using an amino silane coupling agent, and amino functional groups are introduced on the surface of the particles through the hydrolysis and condensation reaction of the silane, significantly improving the dispersion stability of the particles in the emulsion. The modified cerium oxide blocks ultraviolet rays (especially UVA / UVB bands) and inhibits photooxidative degradation through the dual mechanisms of ultraviolet absorption / reflection and free radical scavenging, thereby prolonging the outdoor service life of the fabric. Further, the modified cerium oxide nanoparticles are compounded with water-based polyurethane to form a functional emulsion, which is coated on the surface of the modified polyester fibers: on the one hand, the water-based polyurethane enhances the bonding strength of the emulsion particles and the fibers through film-forming coating; on the other hand, the amino groups on the surface of the cerium oxide particles and the carboxyl groups of the modified polyester fibers undergo amide reaction to form a covalent bond grafting layer, and the double effects significantly improve the adhesion and durability of the coating layer. DETAILED DESCRIPTION

[0024] 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, rather than 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 effort belong to the protection scope of the present application.

[0025] In order to more clearly illustrate the method provided by the present application, the following embodiments are used for detailed description.

[0026] Embodiment 1

[0027] A preparation method of an ultraviolet-proof antistatic fabric mainly comprises the following preparation steps:

[0028] (1) uniformly mix graphene oxide and phosphate buffer solution according to a mass ratio of 1:800, and then ultrasonically treat the mixture at 20℃ and an ultrasonic power of 200W for 2h to form a uniform graphene oxide dispersion liquid; uniformly mix sodium lignosulfonate and deionized water according to a mass ratio of 1:10, and then stir the mixture at 40℃ and 200r / min for 0.5h until the sodium lignosulfonate is completely dissolved; heat the graphene oxide dispersion liquid to 70℃ and stir it at 200r / min, and then dropwise add the sodium lignosulfonate solution to the graphene oxide dispersion liquid, wherein the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.15, and the reaction is carried out for 6h to obtain a modified graphene oxide solution; centrifugally wash the modified graphene oxide solution with deionized water for 3 times until the pH of the supernatant is 6, remove the supernatant, and obtain the modified graphene oxide;

[0029] (2) grind the polyester chip into polyester powder, uniformly mix the modified graphene oxide and the polyester powder according to a mass ratio of 1:15, and then add the mixture into a screw extruder to extrude and pelletize, so as to obtain modified polyester master granules; dry the modified polyester master granules at 100℃ for 12h, and then perform spinning by using a melt spinning method, wherein the spinning temperature is 275℃, the gear pump rotating speed is 13rpm, the winding speed is 2300m / min, and the roller speed is 2350m / min, so as to obtain modified polyester fibers;

[0030] (3) disperse cerium oxide powder in anhydrous ethanol solution according to a mass fraction of 4%, and then add γ-aminopropyltriethoxysilane according to a mass ratio of 1:5, and then stir the mixture at 80℃ and 200r / min for 2.5h, filter the mixture, and then vacuum dry the mixture at 60℃ for 12h, so as to obtain modified cerium oxide nanoparticles; disperse the modified cerium oxide nanoparticles in 10% ethanol solution according to a mass fraction of 2%, and then add water-based polyurethane according to a mass ratio of 1:2, and then treat the mixture at 25℃ and an ultrasonic power of 300W for 20min, so as to obtain a modified cerium oxide nanoparticle composite emulsion;

[0031] (4) The modified polyester fiber is immersed in the modified cerium oxide nanoparticle emulsion at 70°C, 300 r / min stirring for 3h, and then dried at 110°C for 45min to obtain the anti-ultraviolet and antistatic polyester fiber; through a multifunctional flat knitting machine, anti-ultraviolet and antistatic fabrics with different specifications are obtained.

[0032] Example 2:

[0033] A preparation method of an anti-ultraviolet and antistatic fabric mainly includes the following preparation steps:

[0034] (1) The graphene oxide and the phosphate buffer solution are uniformly mixed at a mass ratio of 1:1000, and then ultrasonic treatment is performed at 30°C and an ultrasonic power of 350W for 3h to form a uniform graphene oxide dispersion solution; the sodium lignosulfonate and deionized water are mixed at a mass ratio of 1:15, and then stirred at 50°C and 300r / min for 0.75h until the sodium lignosulfonate is completely dissolved; the graphene oxide dispersion solution is heated to 70°C and stirred at 300r / min, and then the sodium lignosulfonate solution is added dropwise, and the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.15; after 6h of reaction, a modified graphene oxide solution is obtained; the modified graphene oxide is washed by centrifugation with deionized water for 4 times until the pH of the supernatant is 7, and then the supernatant is removed to obtain the modified graphene oxide.

[0035] (2) The polyester chip is ground into polyester powder, and then the modified graphene oxide and the polyester powder are uniformly mixed at a mass ratio of 1:15 and added to a screw extruder for extrusion and pelletization to obtain modified polyester masterbatch; the modified polyester masterbatch is dried at 110°C for 18h, and then melt spinning is performed, and the spinning temperature is 279°C, the gear pump speed is 15rpm, the winding speed is 2400m / min, and the roller speed is 2450m / min to obtain the modified polyester fiber;

[0036] (3) The cerium oxide powder is dispersed in anhydrous ethanol solution at a mass fraction of 5.5%, and then γ-aminopropyltriethoxysilane is added at a mass ratio of 1:5, and then stirred at 80°C and 300r / min for 2.5h; filtration and vacuum drying at 70°C for 18h are performed to obtain modified cerium oxide nanoparticles; the modified cerium oxide nanoparticles are dispersed in 15% ethanol solution at a mass fraction of 6%, and then water-based polyurethane is added at a mass ratio of 1:3.5, and then treated at 30°C and an ultrasonic power of 400W for 30min to obtain a modified cerium oxide nanoparticle composite emulsion;

[0037] (4) The modified polyester fiber is immersed in the modified cerium oxide nanoparticle emulsion at 70°C, 300 r / min stirring for 3h, and then dried at 110°C for 45min to obtain the anti-ultraviolet and antistatic polyester fiber; through a multifunctional flat knitting machine, anti-ultraviolet and antistatic fabrics with different specifications are obtained.

[0038] Example 3:

[0039] A preparation method of an ultraviolet-proof antistatic fabric mainly comprises the following preparation steps:

[0040] (1) uniformly mix graphene oxide and phosphate buffer solution according to a mass ratio of 1:1200, and then ultrasonically treat the mixture at 40℃ and an ultrasonic power of 500W for 4h to form a uniform graphene oxide dispersion liquid; uniformly mix sodium lignosulfonate and deionized water according to a mass ratio of 1:20, and then stir the mixture at 60℃ and 400r / min for 1h until the sodium lignosulfonate is completely dissolved; heat the graphene oxide dispersion liquid to 70℃, and then stir the graphene oxide dispersion liquid at 400r / min, dropwise add the sodium lignosulfonate solution, the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.15, and then react for 6h to obtain a modified graphene oxide solution; centrifugally wash the modified graphene oxide solution with deionized water for 5 times until the pH of the supernatant is 8, remove the supernatant, and then prepare the modified graphene oxide.

[0041] (2) grind polyester chips into polyester powder, then uniformly mix the modified graphene oxide and the polyester powder according to a mass ratio of 1:15, and then add the mixture into a screw extruder to extrude and pelletize the mixture, so as to prepare modified polyester masterbatch; dry the modified polyester masterbatch at 120℃ for 24h, and then perform spinning by using a melt spinning method, the spinning temperature is 282℃, the gear pump speed is 17rpm, the winding speed is 2500m / min, and the roller speed is 2550m / min, so as to prepare modified polyester fiber;

[0042] (3) disperse cerium oxide powder in anhydrous ethanol solution according to a mass fraction of 7%, then add γ-aminopropyltriethoxysilane according to a mass ratio of 1:5, stir the mixture at 80℃ and 400r / min for 2.5h, filter the mixture, and then vacuum dry the mixture at 75℃ for 24h, so as to prepare modified cerium oxide nanoparticles; disperse the modified cerium oxide nanoparticles in 20% ethanol solution according to a mass fraction of 10%, then add water-based polyurethane according to a mass ratio of 1:5, and then treat the mixture at 40℃ and an ultrasonic power of 500W for 40min, so as to prepare modified cerium oxide nanoparticle composite emulsion;

[0043] (4) immerse the modified polyester fiber in the modified cerium oxide nanoparticle emulsion, stir the mixture at 70℃ and 400r / min for 3h, and then dry the mixture at 120℃ for 60min, so as to prepare ultraviolet-proof antistatic polyester fiber; and through a multifunctional flat knitting machine, ultraviolet-proof antistatic fabrics with different specifications are obtained.

[0044] Comparative Example 1

[0045] The difference from Example 2 is only in step (1), the "heat the graphene oxide dispersion liquid to 70℃, and then stir the graphene oxide dispersion liquid at 400r / min, dropwise add the sodium lignosulfonate solution" is adjusted to "heat the graphene oxide dispersion liquid to 60℃, and then stir the graphene oxide dispersion liquid at 400r / min, dropwise add the sodium lignosulfonate solution".

[0046] Comparative Example 2:

[0047] The difference from Example 2 is only in step (1), where "heated to 70℃" is changed to "heated to 65℃".

[0048] Comparative Example 3:

[0049] The difference from Example 2 is only in step (1), where "heated to 70℃" is changed to "heated to 75℃".

[0050] Comparative Example 4:

[0051] The difference from Example 2 is only in step (1), where "heated to 70℃" is changed to "heated to 80℃".

[0052] Comparative Example 5:

[0053] The difference from Example 2 is only in step (1), where "the mass ratio of sodium lignosulfonate and graphene oxide is 1:0.15, and the modified graphene oxide solution is obtained after 6h of reaction" is changed to "the mass ratio of 1:0.05".

[0054] Comparative Example 6:

[0055] The difference from Example 2 is only in step (1), where "the mass ratio of 1:0.15" is changed to "the mass ratio of 1:0.1".

[0056] Comparative Example 7:

[0057] The difference from Example 2 is only in step (1), where "the mass ratio of 1:0.15" is changed to "the mass ratio of 1:0.2".

[0058] Comparative Example 8:

[0059] The difference from Example 2 is only in step (1), where "the mass ratio of 1:0.15" is changed to "the mass ratio of 1:0.25".

[0060] Comparative Example 9:

[0061] The difference from Example 2 is only in step (1), where "the mass ratio of sodium lignosulfonate and graphene oxide is 1:0.15, and the modified graphene oxide solution is obtained after 6h of reaction" is changed to "the reaction is carried out for 4h".

[0062] Comparative Example 10:

[0063] The difference from Example 2 is only in step (1), where "the reaction is carried out for 6h" is changed to "the reaction is carried out for 5h".

[0064] Comparative Example 11:

[0065] The difference from Example 2 is only in step (1), adjusting "reacting for 6h" to "reacting for 7h".

[0066] Comparative Example 12:

[0067] The difference from Example 2 is only in step (1), adjusting "reacting for 6h" to "reacting for 8h".

[0068] Comparative Example 13:

[0069] The difference from Example 2 is only in step (2), adjusting "mixing the modified graphene oxide and the polyester powder at a mass ratio of 1:15, and then adding them into the screw extruder to be extruded and pelletized, to prepare the modified polyester masterbatch" to "mixing the modified graphene oxide and the polyester powder at a mass ratio of 1:5, and then adding them into the screw extruder to be extruded and pelletized, to prepare the modified polyester masterbatch".

[0070] Comparative Example 14:

[0071] The difference from Example 2 is only in step (2), adjusting "mixing at a mass ratio of 1:15" to "mixing at a mass ratio of 1:10".

[0072] Comparative Example 15:

[0073] The difference from Example 2 is only in step (2), adjusting "mixing at a mass ratio of 1:15" to "mixing at a mass ratio of 1:20".

[0074] Comparative Example 16:

[0075] The difference from Example 2 is only in step (2), adjusting "mixing at a mass ratio of 1:15" to "mixing at a mass ratio of 1:25".

[0076] Comparative Example 17:

[0077] The difference from Example 2 is only in step (4), adjusting "immersing the modified polyester fiber in the modified cerium oxide nanoparticle emulsion at 70°C, stirring at 300 r / min for 5h" to "immersing the modified polyester fiber in the modified cerium oxide nanoparticle emulsion at 50°C, stirring at 300 r / min for 5h".

[0078] Comparative Example 18:

[0079] The difference from Example 2 is only in step (4), adjusting "at 70°C" to "at 60°C".

[0080] Comparative Example 19:

[0081] The difference from Example 2 is only in step (4), adjusting "at 70°C" to "at 80°C".

[0082] Comparative Example 20:

[0083] The difference from Example 2 is only in step (4), changing "at 70℃" to "at 90℃".

[0084] Comparative Example 21:

[0085] The difference from Example 2 is only in step (4), changing "stirring for 3h" in "immersing the modified polyester fiber into the modified cerium oxide nanoparticle emulsion at 70℃, stirring at 300r / min for 3h" to "stirring for 1h".

[0086] Comparative Example 22:

[0087] The difference from Example 2 is only in step (4), changing "stirring for 3h" to "stirring for 2h".

[0088] Comparative Example 23:

[0089] The difference from Example 2 is only in step (4), changing "stirring for 3h" to "stirring for 4h".

[0090] Comparative Example 24:

[0091] The difference from Example 2 is only in step (4), changing "stirring for 3h" to "stirring for 5h".

[0092] Comparative Example 25:

[0093] A preparation method of an ultraviolet-resistant antistatic fabric mainly includes the following preparation steps:

[0094] (1) grinding the polyester chips into polyester powder, then uniformly mixing graphene oxide and the polyester powder at a mass ratio of 1:15, adding them into a screw extruder for extrusion and pelletization to prepare modified polyester masterbatch; drying the modified polyester masterbatch at 110℃ for 18h, and using a melt spinning method to spin at a spinning temperature of 279℃, a gear pump speed of 15rpm, a winding speed of 2400m / min, and a roller speed of 2450m / min to prepare modified polyester fiber;

[0095] (2) dispersing cerium oxide powder in anhydrous ethanol solution at a mass fraction of 5.5%, adding γ-aminopropyltriethoxysilane at a mass ratio of 1:5 with the cerium oxide, stirring at 80℃ and 300r / min for 2.5h, filtering, and vacuum drying at 70℃ for 18h to prepare modified cerium oxide nanoparticles; dispersing the modified cerium oxide nanoparticles in 15% ethanol solution at a mass fraction of 6%, adding waterborne polyurethane at a mass ratio of 1:3.5 with the modified cerium oxide nanoparticles, and treating at 30℃ and an ultrasonic power of 400W for 30min to prepare a modified cerium oxide nanoparticle composite emulsion;

[0096] (3) The modified polyester fiber is immersed in the modified cerium oxide nanoparticle emulsion at 70°C with stirring at 300 r / min for 3h, and then dried at 110°C for 45min to obtain an ultraviolet-proof and antistatic polyester fiber; and an ultraviolet-proof and antistatic fabric with different specifications is obtained through a multifunctional flat knitting machine.

[0097] Comparative Example 26:

[0098] A preparation method of an ultraviolet-proof and antistatic fabric mainly includes the following preparation steps:

[0099] (1) The graphene oxide and the phosphate buffer solution are uniformly mixed at a mass ratio of 1:1000, and then ultrasonic treatment is performed at 30°C and an ultrasonic power of 350W for 3h to form a uniform graphene oxide dispersion liquid; the sodium lignosulfonate and deionized water are mixed at a mass ratio of 1:15, and then stirred at 50°C and 300r / min for 0.75h until the sodium lignosulfonate is completely dissolved; the graphene oxide dispersion liquid is heated to 70°C and stirred at 300r / min, and then the sodium lignosulfonate solution is added dropwise, and the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.15, and the reaction is performed for 6h to obtain a modified graphene oxide solution; the modified graphene oxide is washed by centrifugation with deionized water for 4 times until the supernatant has a pH of 7, and then the supernatant is removed to obtain the modified graphene oxide;

[0100] (2) The polyester chip is ground into polyester powder, and then the modified graphene oxide and the polyester powder are uniformly mixed at a mass ratio of 1:15, and then added into a screw extruder for extrusion and pelletization to obtain modified polyester masterbatch; the modified polyester masterbatch is dried at 110°C for 18h, and then spun by a melt spinning method, and the spinning temperature is 279°C, the gear pump speed is 15rpm, the winding speed is 2400m / min, and the roller speed is 2450m / min to obtain modified polyester fiber;

[0101] (3) The cerium oxide is dispersed in a 15% ethanol solution at a mass fraction of 6%, and then the waterborne polyurethane is added at a mass ratio of 1:3.5 to the cerium oxide, and then treated at 30°C and an ultrasonic power of 400W for 30min to obtain a cerium oxide composite emulsion;

[0102] (4) The modified polyester fiber is immersed in the cerium oxide composite emulsion at 70°C with stirring at 300 r / min for 3h, and then dried at 110°C for 45min to obtain an ultraviolet-proof and antistatic polyester fiber; and an ultraviolet-proof and antistatic fabric with different specifications is obtained through a multifunctional flat knitting machine.

[0103] Comparative Example 27:

[0104] A preparation method of an ultraviolet-proof and antistatic fabric mainly includes the following preparation steps:

[0105] (1) The polyester chip is ground into polyester powder, dried at 110℃ for 18h, and spun by melt spinning method, with spinning temperature of 279℃, gear pump rotation speed of 15rpm, winding speed of 2400m / min, and roller speed of 2450m / min, to prepare polyester fiber;

[0106] (2) The cerium oxide powder is dispersed in anhydrous ethanol solution at a mass fraction of 5.5%, and γ-aminopropyltriethoxysilane is added at a mass ratio of 1:5 with the cerium oxide, stirred at 80℃ and 300r / min for 2.5h, filtered, and vacuum dried at 70℃ for 18h to prepare modified cerium oxide nanoparticles; the modified cerium oxide nanoparticles are dispersed in 15% ethanol solution at a mass fraction of 6%, and water-based polyurethane is added at a mass ratio of 1:3.5 with the modified cerium oxide nanoparticles, treated at 30℃ and an ultrasonic power of 400W for 30min to prepare a modified cerium oxide nanoparticle composite emulsion;

[0107] (3) The polyester fiber is immersed in the modified cerium oxide nanoparticle emulsion, stirred at 70℃ and 300r / min for 3h, and then dried at 110℃ for 45min; a multifunctional flat knitting machine is used to obtain anti-UV and anti-static fabrics with different specifications.

[0108] Test Example 1:

[0109] Determination of the optimal conditions of modified graphene oxide (reaction temperature, amount of lignosulfonate sodium added, reaction time)

[0110] Test method: The modified graphene oxide is tested by thermogravimetric analysis mass loss method through grafting rate analysis. The grafting rate is calculated by the weight loss increment in the 200-400℃ interval based on the difference in thermal stability between lignosulfonate sodium and graphene oxide, under a nitrogen atmosphere, with a temperature rise rate of 10℃ / min and a temperature range of 30-500℃.

[0111]

[0112] The surface resistance of the modified polyester fiber is tested by a four-probe resistance tester (ST2258C type, Suzhou Jinge Instrument Co., Ltd.) through conductive performance determination. The results are shown in Table 1.

[0113] Table 1

[0114]

[0115]

[0116] The experimental results of Comparative Example 2 and Comparative Examples 1-4 show that the increase of temperature is beneficial to the increase of grafting rate, and the maximum value of 15.4% is reached at 80℃. However, when the grafting rate exceeds the critical value of 13.6%, the conductivity of the modified graphene oxide begins to decrease. This phenomenon can be attributed to excessive grafting: the excessive sodium lignosulfonate molecules cause self-agglomeration, which in turn blocks the interlayer gap of the graphene oxide, hinders the effective transmission of electrons, and finally leads to the increase of material resistance. Therefore, 70℃ is preferred to balance the grafting rate and conductivity.

[0117] The results of Comparative Example 2 and Comparative Examples 5-8 show that the addition amount of sodium lignosulfonate has a significant effect on the grafting rate. When the concentration of sodium lignosulfonate in the system is too high, a large number of sodium lignosulfonate molecules are tightly adsorbed or physically coated on the surface of the graphene oxide layer, which reduces the grafting rate. It is found through experiments that the grafting rate is the highest when the mass ratio of sodium lignosulfonate to graphene oxide is 1:0.15.

[0118] The results of Comparative Example 2 and Comparative Examples 9-12 show that when the reaction time is 6h, the basic grafting rate reaches the maximum, and the grafting rate does not increase significantly with the subsequent extension of the reaction time. From the perspective of experimental efficiency, the reaction time is controlled to be 6h.

[0119] Therefore, the reaction temperature of 70℃, the mass ratio of sodium lignosulfonate to graphene oxide of 1:0.15, and the reaction time of 6h are selected as the optimal conditions, i.e., the reaction conditions of Example 2.

[0120] Test Example 2:

[0121] Determination of the optimal addition amount of modified graphene oxide

[0122] Test method: The antistatic performance test is carried out according to GB / T12703.1-2008 "Evaluation of the static properties of textiles Part 1: Static voltage half-life period", and the static voltage and half-life period are tested by YG(L)342D static tester. The discharge voltage is 10kV, the rotation speed is 1500r / min, and the test time is 30s. The results are shown in Table 2.

[0123] Table 2

[0124] Electrostatic voltage Electrostatic voltage standard deviation Half-life Half-life standard deviation Example 2 1034V ±6.643V 1.305s ±0.057s Comparative Example 13 2993V ±5.489V 7.372s ±0.032s Comparative Example 14 1725V ±7.489V 3.594s ±0.018s Comparative Example 15 1079V ±4.375V 1.637s ±0.043s Comparative Example 16 1167V ±2.183V 1.996s ±0.091s

[0125] The experimental results of Comparative Example 2 and Comparative Examples 13-16 show that as the addition amount of modified graphene oxide in the polyester increases, the static voltage and half-life period of the anti-ultraviolet antistatic fabric decrease significantly, and the antistatic performance improves significantly. When the mass ratio of modified graphene oxide to polyester powder is 1:15, the static voltage and half-life period are the lowest. Further increasing the addition amount of modified graphene oxide does not further reduce the static voltage and half-life period, indicating that the loading amount of modified graphene oxide on the surface of the fabric has reached saturation.

[0126] Test Example 3:

[0127] Determination of the optimum reaction conditions (reaction temperature, reaction time) for grafting coating of modified polyester fibers with the modified ceria nanoparticle emulsion

[0128] Test method: The anti-static and anti-ultraviolet performance of the fabric was tested by anti-ultraviolet performance test, and the anti-ultraviolet performance of the anti-static and anti-ultraviolet fabric was tested according to GB / T18830-2009 "Evaluation of Anti-Ultraviolet Performance of Textiles". The results are shown in Table 3.

[0129] Table 3

[0130]

[0131] From the experimental results of Comparative Example 2 and Comparative Examples 17-24, it can be seen that as the reaction temperature increases, the anti-ultraviolet performance of the fabric is significantly improved. This is because high temperature promotes the complete hydrolysis and condensation of the silane coupling agent, forming a dense ceria crosslinking network, and activating the complete fusion of the water-based polyurethane latex particles into a continuous film layer, greatly enhancing the ultraviolet reflection efficiency; however, if the reaction temperature is too high, the anti-ultraviolet coating layer will be too thick, making the fabric heavy and reducing its air permeability, thereby affecting the wearing comfort. When the reaction temperature reaches 70°C, the UPF value of the fabric has reached a high level, meeting the anti-ultraviolet requirements in actual applications. Therefore, the optimum reaction temperature is controlled at 70°C.

[0132] From the experimental results of Comparative Example 2 and Comparative Examples 17-24, it can be seen that by prolonging the reaction time, the anti-ultraviolet performance of the fabric can be improved. This is because sufficient time ensures that the ceria particles are fully dispersed into the internal pores of the fibers, and the amide reaction between the carboxyl groups on the fiber surface and the silane amino groups tends to be complete, forming a strong and tough covalent bonding interface; however, if the time is further prolonged, the UPF value does not increase significantly, and from the perspective of experimental efficiency, the reaction time is controlled at 3h.

[0133] Test Example 4:

[0134] Test of anti-static performance, anti-ultraviolet performance and wash resistance

[0135] Test method of anti-static performance: The static voltage and half-life period of the anti-static and anti-ultraviolet fabric obtained in each example and the fabric of Comparative Examples 25-27 were tested by a YG(L)342D static tester according to GB / T12703.1-2008 "Evaluation of Static Performance of Textiles Part 1 Static Voltage Half-Life Period". The discharge voltage was 10kV, the rotation speed was 1500r / min, and the test time was 30s.

[0136] Test method of anti-ultraviolet performance: The anti-ultraviolet performance of the anti-static and anti-ultraviolet fabric obtained in each example and the fabric of Comparative Examples 25-27 was tested according to GB / T18830-2009 "Evaluation of Anti-Ultraviolet Performance of Textiles".

[0137] Washing resistance test method: the anti-UV and anti-static fabric obtained from each example and the fabric of comparative examples 25-27 are placed in water with 10 g / L standard washing powder, the water bath temperature is set to 40℃, and washing is performed for 15 min each time. The fabric is rinsed and dried again, then added to water with 10 g / L standard washing powder again. The above operation is repeated for 10 times, and finally taken out and dried in a forced air drying oven at 60℃ before testing the anti-UV performance of the anti-UV and anti-static fabric after washing resistance.

[0138] The results are shown in Table 4.

[0139] Table 4

[0140]

[0141]

[0142] From the experimental data comparison of examples 1-3 and comparative examples 25-27 in Table 4, it can be found that the anti-UV and anti-static fabric prepared by the present application has good anti-static performance, anti-UV performance and washing resistance.

[0143] From the comparison of examples 1-3 and comparative example 25, it can be found that when lignin sodium sulfonate is used to modify graphene oxide, the sulfonic acid group of lignin sodium sulfonate acts as a strong electron acceptor and forms a bond with the oxygen-containing group on the surface of graphene oxide, thereby triggering the partial reduction of graphene oxide. At the same time, the sulfonic acid group of lignin sodium sulfonate can effectively inhibit the agglomeration of graphene oxide nanosheets and promote the formation of a uniform and stable dispersion liquid. Through the above two aspects, the ionic conductivity of graphene oxide is significantly improved.

[0144] From the comparison of examples 1-3 and comparative example 26, it can be found that when γ-aminopropyl triethoxysilane is used to modify cerium oxide, the amino group of γ-aminopropyl triethoxysilane reacts with the carboxyl group on the surface of polyester fiber to form an amide, thereby building a stable chemical bridge between the fiber and the cerium oxide particles, avoiding the risk of physical adhesion of traditional coatings falling off; at the same time, the three-dimensional network formed by silane cross-linking tightly covers and locks the cerium oxide nanoparticles on the surface of the fiber, and through the densification arrangement, the ultraviolet reflection efficiency is improved, thereby realizing the synergistic gain of anti-UV and durability.

[0145] From the comparison of examples 1-3 and comparative example 26, it can be found that the addition of graphene oxide during the preparation of the anti-UV and anti-static fabric can effectively improve the anti-static performance.

Claims

1. An ultraviolet resistant antistatic fabric, characterized by comprising: The anti-ultraviolet and anti-static fabric is knitted by the anti-ultraviolet and anti-static polyester fiber through a multifunctional flat knitting machine.

2. The anti-UV and anti-static fabric according to claim 1, characterized in that, The anti-ultraviolet and anti-static polyester fiber is obtained by grafting and coating modified cerium oxide nanoparticles emulsion to the surface of modified polyester fiber.

3. The anti-UV antistatic fabric according to claim 2, characterized in that, The modified cerium oxide nanoparticles emulsion is obtained by reacting cerium oxide with gamma-aminopropyl triethoxysilane to obtain modified cerium oxide nanoparticles, and then compounding with water-based polyurethane.

4. The anti-UV and anti-static fabric according to claim 2, characterized in that, The modified polyester fiber is obtained by mixing modified graphene oxide with polyester powder and spinning.

5. The anti-UV antistatic fabric according to claim 4, characterized in that, The modified graphene oxide is obtained by reacting sodium lignosulfonate with graphene oxide.

6. A method for preparing an ultraviolet resistant antistatic fabric, characterized by, The preparation steps include: (1) uniformly mix graphene oxide and phosphate buffer solution at a mass ratio of 1:(800-1200), and then ultrasonically treat the mixture at 20-40 DEG C under a ultrasonic power of 200-500 W for 2-4 h to form a uniform graphene oxide dispersion; uniformly mix sodium lignosulfonate and deionized water at a mass ratio of 1:10-20, and then stir the mixture at 40-60 DEG C at a stirring speed of 200-400 r / min for 0.5-1 h until the sodium lignosulfonate is completely dissolved; heat the graphene oxide dispersion to 60-80 DEG C, and then add the sodium lignosulfonate solution drop by drop while stirring at a stirring speed of 200-400 r / min, wherein the mass ratio of the sodium lignosulfonate to the graphene oxide is 1:0.05-0.25, and the reaction is carried out for 4-8 h to obtain a modified graphene oxide solution; centrifugally wash the modified graphene oxide solution with deionized water for 3-5 times until the pH of the supernatant is 6-8, remove the supernatant, and obtain the modified graphene oxide; (2) grind polyester chips into polyester powder, then uniformly mix the modified graphene oxide and the polyester powder at a mass ratio of 1:5-25, and then add the mixture into a screw extruder to extrude and pelletize, thereby obtaining modified polyester masterbatch; dry the modified polyester masterbatch at 100-120 DEG C for 12-24 h, and then spin the modified polyester masterbatch by using a melt spinning method, wherein the spinning temperature is 275-282 DEG C, the gear pump rotating speed is 13-17 rpm, the winding speed is 2300-2500 m / min, and the roller speed is 2350-2550 m / min, thereby obtaining modified polyester fiber; (3) disperse cerium oxide powder in anhydrous ethanol solution at a mass fraction of 4%-7%, and then add gamma-aminopropyl triethoxysilane at a mass ratio of 1:3-7, and then stir the mixture at 70-90 DEG C at a stirring speed of 200-400 r / min for 2-3 h, filter the mixture, and then vacuum dry the mixture at 60-75 DEG C for 12-24 h, thereby obtaining modified cerium oxide nanoparticles; compound the modified cerium oxide nanoparticles with water-based polyurethane to obtain a modified cerium oxide nanoparticles emulsion; (4) immerse the modified polyester fiber in the modified cerium oxide nanoparticles emulsion, and then stir the mixture at 50-90 DEG C at a stirring speed of 200-400 r / min for 1-5 h, and then dry the mixture at 100-120 DEG C for 30-60 min, thereby obtaining anti-ultraviolet and anti-static polyester fiber; and then obtain anti-ultraviolet and anti-static fabric with different specifications by using a multifunctional flat knitting machine.

7. The method of claim 6, wherein the fabric is subjected to a heat treatment at a temperature of 100-200°C for 1-10 minutes. In step (1), the graphene oxide is an industrial grade; and the phosphate buffer solution has a pH of 7.2-7.

4.

8. The method of claim 6, wherein the anti-static fabric is prepared by coating the fabric with the anti-static agent. The preparation method of the modified cerium oxide nanoparticle composite emulsion in step (3) is as follows: dispersing modified cerium oxide nanoparticles in a 10%-20% ethanol solution at a mass fraction of 2%-10%, adding water-based polyurethane with a mass ratio of 1:2-5 to the modified cerium oxide nanoparticles, and treating at 25-40°C for 20-40 min under an ultrasonic power of 300-500 W to obtain the modified cerium oxide nanoparticle composite emulsion.

9. The method of claim 6, wherein the anti-static fabric is prepared by coating the fabric with the anti-static agent and the UV protective agent. The solid content of the water-based polyurethane in step (3) is 40%.

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