CN-118292195-B - Preparation method of breathable high-elastic mask fabric

Abstract

The invention discloses a preparation method of a breathable high-elastic mask fabric, and relates to the technical field of textile fabric materials. The breathable high-elastic mask fabric comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are both non-woven fabrics, the middle layer is a composite film, the non-woven fabrics are prepared by melt-blowing polybutylene terephthalate composite master batches, the composite film is prepared by compounding hydroxyl polylactic acid and 4-guanidino phthalic acid hydrochloride and carrying out electrostatic spinning, modified graphene oxide is introduced into a polybutylene terephthalate end group, the elasticity and the heat resistance of the non-woven fabrics are enhanced, and 4-guanidino phthalic acid hydrochloride is introduced into the hydroxyl polylactic acid, so that the composite film has antibacterial property and simultaneously enhances filterability, air permeability and dirt resistance.

Inventors

• LIU ZEJIE

Assignees

• 刘泽杰

Dates

Publication Date

20260505

Application Date

20220511

Claims (1)

1. 1. The preparation method of the breathable high-elastic mask fabric is characterized by comprising the following specific steps of: (1) Mixing silane coupling agent KH560, triethylene tetramine and absolute ethyl alcohol according to the mass ratio of 1:2.2:18, reacting for 22 hours at room temperature to obtain solution A, mixing graphene oxide and deionized water according to the mass ratio of 1:18, performing ultrasonic treatment at 45kHz for 0.5 hours to obtain solution B, mixing solution A and solution B according to the mass ratio of 4.5:1, adjusting pH to 5 by acetic acid, heating to 85 ℃ to react for 22 hours, performing suction filtration after the reaction is finished, washing by absolute ethyl alcohol and deionized water for 6 times, finally drying in a 55 ℃ vacuum drying box to constant weight, obtaining amino graphene oxide, mixing pyridine-2, 3-dicarboxylic acid and absolute ethyl alcohol according to the mass ratio of 3:18, adjusting pH to 6.5 by ammonia water, dropwise adding a 5% calcium nitrate ethanol solution according to the mass fraction of 6ml/min, adjusting pH to 6.5 by ammonia water, adding pyridine-2, 3-dicarboxylic acid and graphene oxide with the mass ratio of 4 times of pyridine-2, 3-dicarboxylic acid, performing suction filtration, transferring the amino graphene oxide with the absolute ethyl alcohol with the mass ratio of 3:2.1 rpm, performing suction filtration, washing by the graphene oxide with the absolute ethyl alcohol for 6 times, performing suction filtration, performing the reaction, performing suction filtration, and washing by the reaction for 30 hours, and performing suction filtration, and washing by using the absolute ethyl alcohol for 30 hours, and performing suction filtration, and washing by the reaction, and washing by using the absolute ethyl alcohol under the reaction, and washing by the dry graphene oxide and washing by using absolute ethyl alcohol and 3; (2) Mixing polybutylene terephthalate, modified graphene oxide and tannic acid according to a mass ratio of 45:10:5, placing the mixture in a high-speed blending machine, stirring for 15min at 105 ℃ and 800rpm, transferring the mixture into a wire drawing machine, drawing wires through spinneret orifices to form a long fiber web, hot-pressing the long fiber web by a hot press to form, cooling and shaping the long fiber web to obtain a non-woven fabric with a gram weight of 40g/m 2 , and cutting the non-woven fabric into an upper layer and a lower layer with the same size; (3) Mixing thiourea dioxide with peracetic acid solution with the mass fraction of 2% under ice bath condition, reacting for 3-3.5 h, filtering and washing with absolute ethyl alcohol for 4 times, drying in a vacuum drying oven with the mass fraction of 0.45 times of 4-aminophthalic acid to constant weight to obtain thiourea dioxide, mixing deionized water, potassium carbonate and 4-aminophthalic acid according to the mass ratio of 7.5:1.2:2, stirring until dissolving, adding thiourea dioxide with the mass of 0.85 times of 4-aminophthalic acid for 6 times, reacting for 13min at room temperature after adding for 5h, standing for 24h, filtering and washing with acetone for 4 times, dispersing in deionized water with the mass of 9 times of 4-aminophthalic acid, heating to 85 ℃, stirring until dissolving, adding hydrochloric acid solution with the mass fraction of 37% of 0.45 times of 4-aminophthalic acid, filtering when the deionized water is hot, standing for 11h, cooling to 4 ℃, filtering, and vacuum drying at 85 ℃ to obtain 4-guanidino phthalate hydrochloride; (4) Dispersing polylactic acid in 1, 4-dioxane with 13 times of the mass of the polylactic acid, heating to 55 ℃, carrying out ultrasonic treatment at 45kHz for 20min, dripping an ethanolamine solution with 1.4 times of the mass of the polylactic acid and 2% of the mass fraction at the speed of 6mL/min, continuing to react for 25min, transferring to a refrigerator with the temperature of-43 ℃ for freezing for 11h, extracting for 4d in the refrigerator with the temperature of-4 ℃ for three times per day, and finally, carrying out freeze drying in a freeze dryer with the temperature of-55 ℃ to obtain the hydroxyl polylactic acid, mixing dichloromethane, dimethylformamide, hydroxyl polylactic acid and 4-guanidino phthalate according to the mass ratio of 8:2:2:1, stirring for 2h at 40rpm to obtain an electrostatic spinning solution, carrying out electrostatic spinning, wherein the receiving distance is 16cm, the injection speed of the spinning solution is 2mL/h, the relative humidity is 50%, the temperature is 25 ℃ and the voltage is 16kV, and thus obtaining the composite membrane; (5) Sequentially paving a lower layer, a composite film and an upper layer, scraping edges, hot-pressing for 4min on a hot press at 105 ℃, cooling to room temperature, soaking in 93% acetone solution for 5min, taking out, and naturally airing to obtain the breathable high-elastic mask fabric.

Description

Preparation method of breathable high-elastic mask fabric Technical Field The invention relates to the technical field of textile fabric materials, in particular to a preparation method of a breathable high-elastic mask fabric. Background In preventing infectious diseases, masks are used for preventing viruses and bacteria transmitted by spray and the like, and are a convenient protection measure for protecting human beings from being infected by bacteria. The mask is worn by people to set a filtering barrier for the respiratory tract, and has a filtering effect on inhaled air, so that a large amount of dust, bacteria, viruses, various harmful gases and the like mixed in the air cannot enter a human body. However, some viruses and bacteria are relatively stubborn and subtle, and can not play a role in isolating them only by virtue of the filterability of the fabric of the common mask, so that the mask with the functions of resisting bacteria and viruses is very important to develop in order to isolate them and better protect the health of a human body. However, when the protective clothing is used in summer, the temperature in the protective clothing is high, bacteria are easy to breed, the performance of the mask can be influenced, if the protective clothing is replaced, resources are excessively used, and the heat resistance, the air permeability, the anti-fouling property and the like of the mask are ensured while the antibiosis is pursued. Disclosure of Invention The invention aims to provide a breathable high-elastic mask fabric and a preparation method thereof, so as to solve the problems in the background technology. A breathable high-elastic mask fabric comprises an upper layer, an intermediate layer and a lower layer, wherein the upper layer and the lower layer are non-woven fabrics, and the intermediate layer is a composite film. Preferably, the non-woven fabric is prepared by melt-blowing polybutylene terephthalate composite master batch, the polybutylene terephthalate composite master batch is prepared by introducing modified graphene oxide on a polybutylene terephthalate end group, and the modified graphene oxide is prepared by reacting amino graphene oxide with pyridine-2, 3-dicarboxylic acid calcium. Preferably, the composite membrane is prepared by compounding hydroxyl polylactic acid and 4-guanidino phthalic acid hydrochloride for electrostatic spinning. Preferably, the hydroxyl polylactic acid is prepared by reacting ethanol amine with polylactic acid, and the 4-guanidino phthalic acid hydrochloride is prepared by reacting sulfur trioxide urea with 4-aminophthalic acid. Preferably, the preparation method of the breathable high-elastic mask fabric comprises the following specific steps of: (1) Mixing pyridine-2, 3-dicarboxylic acid and absolute ethyl alcohol according to a mass ratio of 3:15-3:20, regulating the pH to 6-7 by using ammonia water, dropwise adding a calcium nitrate ethanol solution with a mass fraction of 3-8% at a rate of 5-8 ml/min, regulating the pH to 6-7 by using ammonia water, adding amino graphene oxide with a mass 3-5 times that of pyridine-2, 3-dicarboxylic acid, stirring and reacting for 24-36 h at 50-80 rpm, standing for 5-8 h, performing suction filtration, washing for 3-5 times by using absolute ethyl alcohol, washing for 3-5 times by using acetone, transferring to a drying box with a temperature of 50-60 ℃ and drying to constant weight to obtain modified graphene oxide; (2) Mixing polybutylene terephthalate, modified graphene oxide and tannic acid according to a mass ratio of 40:8:3-50:15:7, placing the mixture in a high-speed blending machine, stirring the mixture for 10-20 min at 90-120 ℃ and 600-1000 rpm, transferring the mixture into a wire drawing machine, drawing the mixture through a spinneret orifice to form a long fiber web, hot-pressing the long fiber web through a hot press, cooling and shaping the long fiber web to obtain non-woven fabrics, and cutting the non-woven fabrics into upper layers and lower layers with the same size; (3) Mixing deionized water, potassium carbonate and 4-aminophthalic acid according to a mass ratio of 7:1:1.5-8:1.5:3, stirring until the mixture is dissolved, adding thiourea trioxide with a mass of 0.8-0.9 times of 4-aminophthalic acid for 5-8 times, reacting for 10-15 min at room temperature for 4-6 h after the addition is completed, standing for 24h, filtering, washing for 3-5 times by acetone, dispersing in the deionized water with a mass of 8-10 times of 4-aminophthalic acid, heating to 80-90 ℃, stirring until the mixture is dissolved, adding hydrochloric acid solution with a mass of 0.4-0.5 times of the mass of 4-aminophthalic acid, filtering when the mixture is hot, standing for 10-12 h, cooling to 4-5 ℃, filtering, and vacuum drying at 80-90 ℃ to obtain 4-guanidino-phthalic acid hydrochloride; (4) Mixing dichloromethane, dimethylformamide, hydroxy polylactic acid and 4-guanidino phthalic acid hydrochloride according to