阅读说明：本技术 一种阻燃抗菌毛巾面料及其制备工艺 (Flame-retardant antibacterial towel fabric and preparation process thereof ) 是由 祝传秀 于 2021-05-11 设计创作，主要内容包括：本发明公开了一种阻燃抗菌毛巾面料及其制备工艺,涉及纺织技术领域。本发明在制备阻燃抗菌毛巾面时,先将竹纤维碾碎,浸于活化液中进行活化,向活化后的竹纤维溶液中加入纳米银粉末,搅拌均匀后制得改性纺丝熔体,并进行熔融纺丝,得到改性竹纤维,再将浸泡后的改性竹纤维先后浸于多巴胺溶液和海藻酸钠水凝胶中,再经干燥、纺织成面料即得阻燃抗菌毛巾面料基体；将制备得到的阻燃抗菌毛巾面料基体使用自制阻燃整理液进行阻燃后整理制得本产品；本发明制备的阻燃抗菌毛巾面,具备阻燃抗菌性能的同时,在干燥时就可以进行烟尘过滤。(The invention discloses a flame-retardant antibacterial towel fabric and a preparation process thereof, and relates to the technical field of textiles. The preparation method comprises the steps of crushing bamboo fibers, soaking the bamboo fibers in an activation solution for activation, adding nano-silver powder into an activated bamboo fiber solution, uniformly stirring to obtain a modified spinning melt, carrying out melt spinning to obtain modified bamboo fibers, soaking the soaked modified bamboo fibers in a dopamine solution and sodium alginate hydrogel in sequence, drying and spinning to obtain a fabric, thus obtaining a flame-retardant antibacterial towel fabric substrate; the prepared flame-retardant antibacterial towel fabric substrate is subjected to flame-retardant post-finishing by using a self-made flame-retardant finishing liquid to prepare the product; the flame-retardant antibacterial towel surface prepared by the invention has flame-retardant antibacterial performance and can be used for filtering smoke dust during drying.)

1. The flame-retardant antibacterial towel fabric is characterized by mainly comprising the following raw material components in parts by weight: 1-2 parts of bamboo fiber, 4-8 parts of activating solution, 0.2-0.8 part of nano-silver powder, 0.5-1.2 parts of dopamine, 8-16 parts of sodium alginate hydrogel and 10-20 parts of self-made flame retardant finishing liquid.

2. The flame-retardant antibacterial towel fabric according to claim 1, wherein the activating solution is a mixed solution of alkali liquor and urea; the alkali liquor is sodium hydroxide solution.

3. The flame-retardant antibacterial towel fabric according to claim 2, wherein the self-made flame-retardant finishing liquid is prepared by grafting acid sodium alginate onto stearic acid amide modified montmorillonite.

4. The preparation process of the flame-retardant antibacterial towel fabric is characterized by comprising the following process flows of: preparing modified bamboo fibers, preparing a fabric substrate, preparing a self-made flame-retardant finishing liquid, and finishing the fabric.

5. The preparation process of the flame-retardant antibacterial towel fabric according to claim 4, which is characterized by comprising the following specific steps of:

(1) grinding bamboo fibers to 80 meshes, immersing the bamboo fibers in an activation solution for ultrasonic activation, adjusting the pH to 7 by using sodium sulfate with the mass fraction of 20%, adding nano-silver powder into the activated bamboo fiber solution, stirring uniformly, and feeding into a double-screw extruder to prepare a modified spinning melt;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 10-20% by mass of dopamine solution for 10-20 min, immediately taking out, soaking in sodium alginate hydrogel, taking out after 5-8 min, drying, and spinning to obtain a fabric matrix;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion liquid into the round-bottom flask after the stearic acid is completely melted, heating to 160-180 ℃ after dropwise adding is finished, reacting for 5-10 h, and cooling to obtain modified montmorillonite; adding sodium alginate hydrogel into the prepared modified montmorillonite, and uniformly stirring to prepare a self-made flame-retardant finishing liquid;

(5) and (4) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), slowly stirring and drying, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 40-50%, and drying to constant weight to obtain a finished product.

6. The preparation process of the flame-retardant antibacterial towel fabric according to claim 5, characterized in that in the step (1): the activating solution is sodium hydroxide, urea and deionized water according to the mass ratio of 7: 10: 70 mixing to obtain the final product; the mass ratio of the bamboo fiber, the activating solution and the nano silver powder is 1: 4: 0.2-1: 4: 0.4; during ultrasonic activation, the frequency is 30-50 kHz, and the time is 30-50 min; the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MPa under the rotation of the screw.

7. The preparation process of the flame-retardant antibacterial towel fabric according to claim 5, characterized in that in the step (3): the mass ratio of the modified bamboo fiber to the dopamine solution to the sodium alginate hydrogel is 1: 5: 5-1: 6: 6.

8. the preparation process of the flame-retardant antibacterial towel fabric according to claim 5, characterized in that in the step (4): the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite and stearic acid is 1: 1: 7: 3-1: 1: 9: 3; the acceleration rate of the dispersed liquid drops is 10-20 drops/min; the mass ratio of the modified montmorillonite to the sodium alginate hydrogel is 5: 2.

9. the preparation process of the flame-retardant antibacterial towel fabric according to claim 5, characterized in that in the step (5): the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: 6-1: 8; the stirring speed is 200-400 rpm; the temperature when drying is carried out while slowly stirring is 60 to 65 ℃.

Technical Field

The invention relates to the field of textiles, in particular to a flame-retardant antibacterial towel fabric and a preparation process thereof.

Background

During the use process of the textile, micro-dust and impurities in the environment are easily adsorbed, so that a large number of microbes such as bacteria and the like, especially towels are bred, in daily life, the microbes can not only cause the performances of the towels, such as appearance, mechanical properties and the like, but also cause diseases when contacting with the skin, and the diseases are also caused when contacting with people, so that the health of the people is endangered.

The problem to be solved is how to improve the flame retardance and the antibacterial property of the towel at the same time, when a fire disaster happens and the escape is carried out, the wet towel needs to cover the mouth and the nose to prevent smoke dust from entering a respiratory tract to cause harm, but when the distance from a water source is far away, the towel cannot be wetted, so that the smoke dust filtering capacity of the towel fabric is improved, the towel also has the unusual smoke dust filtering capacity when being dried, and the development prospect is very promising.

Disclosure of Invention

The invention aims to provide a flame-retardant antibacterial towel fabric and a preparation process thereof, and aims to solve the problems in the background art.

The flame-retardant antibacterial towel fabric is characterized by mainly comprising the following raw material components in parts by weight:

1-2 parts of bamboo fiber, 4-8 parts of activating solution, 0.2-0.8 part of nano-silver powder, 0.5-1.2 parts of dopamine, 8-16 parts of sodium alginate hydrogel and 10-20 parts of self-made flame retardant finishing liquid.

Preferably, the activating solution is a mixed solution of alkali liquor and urea; the alkali liquor is sodium hydroxide solution.

Preferably, the self-made flame-retardant finishing liquid is prepared by grafting acid sodium alginate to stearic acid amide modified montmorillonite.

Preferably, the preparation process of the flame-retardant antibacterial towel fabric comprises the following process flows: preparing modified bamboo fibers, preparing a fabric substrate, preparing a self-made flame-retardant finishing liquid, and finishing the fabric.

Preferably, the preparation process of the flame-retardant antibacterial towel fabric comprises the following specific steps:

(1) grinding bamboo fibers to 80 meshes, immersing the bamboo fibers in an activation solution for ultrasonic activation, adjusting the pH to 7 by using sodium sulfate with the mass fraction of 20%, adding nano-silver powder into the activated bamboo fiber solution, stirring uniformly, and feeding into a double-screw extruder to prepare a modified spinning melt;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 10-20% by mass of dopamine solution for 10-20 min, immediately taking out, soaking in sodium alginate hydrogel, taking out after 5-8 min, drying, and spinning to obtain a fabric matrix;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion liquid into the round-bottom flask after the stearic acid is completely melted, heating to 160-180 ℃ after dropwise adding is finished, reacting for 5-10 h, and cooling to obtain modified montmorillonite; adding sodium alginate hydrogel into the prepared modified montmorillonite, and uniformly stirring to prepare a self-made flame-retardant finishing liquid;

(5) and (4) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), slowly stirring and drying, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 40-50%, and drying to constant weight to obtain a finished product.

Preferably, in the step (1): the activating solution is sodium hydroxide, urea and deionized water according to the mass ratio of 7: 10: 70 mixing to obtain the final product; during ultrasonic activation, the frequency is 30-50 kHz, and the time is 30-50 min; the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MPa under the rotation of the screw.

Preferably, in the step (3): the mass ratio of the modified bamboo fiber to the dopamine solution to the sodium alginate hydrogel is 1: 5: 5-1: 6: 6. .

Preferably, in the step (4): the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite and stearic acid is 1: 1: 7: 3-1: 1: 9: 3; the acceleration rate of the dispersed liquid drops is 10-20 drops/min; the mass ratio of the modified montmorillonite to the sodium alginate hydrogel is 5: 2.

preferably, in the step (5): the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: 6-1: 8; the stirring speed is 200-400 rpm; the temperature when drying is carried out while slowly stirring is 60 to 65 ℃.

Compared with the prior art, the invention has the following beneficial effects:

crushing bamboo fibers, soaking in an activating solution for activation, adding nano-silver powder into an activated bamboo fiber solution, uniformly stirring to prepare a modified spinning melt, carrying out melt spinning to obtain modified bamboo fibers, soaking the soaked modified bamboo fibers in a dopamine solution and sodium alginate hydrogel in sequence, carrying out self-polymerization on the surface of the modified bamboo fibers to form a polydopamine film, fixing nano-silver powder on the modified bamboo fibers, adsorbing the sodium alginate hydrogel on the surface of the modified bamboo fibers by utilizing adsorbability, drying and spinning to obtain a fabric, namely a flame-retardant antibacterial towel fabric substrate, drying sodium alginate to form solid powder adhered to the surface of the fabric substrate, carrying out post-finishing to enable the sodium alginate to be crosslinked with stearamide in a self-made flame-retardant finishing solution to fill up interlayer pores, and enabling a part of the self-made flame-retardant finishing solution to be crosslinked on the surface of the fabric substrate, the other part is filled in pores of the fabric substrate, so that the density of the fibers is improved, the washing resistance of the prepared flame-retardant antibacterial towel fabric is enhanced, and smoke and dust can be filtered when the fabric is dried; the flame-retardant after-finishing fabric has antibacterial property, and generates calcium oxide and calcium carbonate precipitates to cover the surface of montmorillonite after being heated, so that the heat insulation effect is achieved.

Performing flame-retardant after-treatment on the prepared flame-retardant antibacterial towel fabric substrate by using a self-made flame-retardant finishing liquid; the self-made flame-retardant finishing liquid is prepared by grafting acid sodium alginate on stearic acid amide modified montmorillonite; water molecules among the montmorillonite layers modified by stearic acid amide are reacted when stearic acid is added for amidation, the generated stearic acid amide long-chain intercalation enters the montmorillonite layers, the lamella is propped while the position of the water molecules is replaced, and the interlayer spacing is increased, so that more acidic sodium alginate can be attached to the surface of the montmorillonite; adding acid sodium alginate for heating, crosslinking with macromolecular chains in the acid sodium alginate and calcium ions on the modified montmorillonite to form calcium alginate with a cyclized chelate structure, dehydrating and cyclizing to form lactide when hydroxyl and carboxyl in the molecular structure are heated, and forming the cyclized chelate structure with crosslinking to be crossed and stuck on the surface of the modified montmorillonite, so that the montmorillonite is directly changed into a layered bulge structure, the concentration and the cohesion between the acid sodium alginate and the macromolecular chains of the montmorillonite are increased, the heat resistance of the fabric is improved, and the thermal cracking temperature is increased; after the fabric subjected to flame-retardant post-finishing is heated, calcium ions and sodium ions form an alkaline environment in the combustion process, so that alginic acid macromolecules are easy to generate decarboxylation reaction to generate incombustible carbon dioxide, oxygen is isolated, and the flame-retardant effect of the towel fabric is enhanced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to more clearly illustrate the method provided by the present invention, the following examples are used for detailed description, and the method for testing each index of the flame-retardant antibacterial towel fabric manufactured in the following examples is as follows:

the filtration efficiency is as follows: the flame-retardant antibacterial towel fabrics prepared in the examples 1 and 2 and the comparative example 1 are cut to the same area, and then the filtration efficiency test is carried out, wherein the test method of the filtration efficiency refers to GB2626, the test medium is sodium chloride, the geometric diameter is 0.26 μm, and the particle number diameter is 0.067 μm.

Flame retardancy: the limit oxygen indexes of the flame-retardant antibacterial towel fabrics prepared in the examples 1 and 2 and the comparative examples 1 and 2 are tested by referring to the standard GB/T5454 oxygen index method for textile burning performance test,

example 1

The flame-retardant antibacterial towel fabric mainly comprises the following components in parts by weight:

1 part of bamboo fiber, 4 parts of activating solution, 0.2 part of nano-silver powder, 0.5 part of dopamine, 8 parts of sodium alginate hydrogel and 10 parts of self-made flame-retardant finishing liquid.

The preparation process of the flame-retardant antibacterial towel fabric comprises the following steps:

(1) grinding bamboo fibers to 80 meshes, and mixing sodium hydroxide, urea and deionized water according to a mass ratio of 7: 10: 70, uniformly mixing to obtain an activation solution, soaking the activation solution in the activation solution for ultrasonic activation, adjusting the frequency to 30kHz and the time to 50min during ultrasonic activation, adjusting the pH to 7 by using 20% sodium sulfate by mass fraction, adding nano-silver powder into the activated bamboo fiber solution, and uniformly stirring, wherein the mass ratio of the bamboo fiber, the activation solution and the nano-silver powder is 1: 4: 0.2, feeding into a double-screw extruder, wherein the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MP under the rotation of the screw, so that a modified spinning melt is prepared;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 10% dopamine solution for 10min, immediately taking out, soaking in sodium alginate hydrogel, taking out after 5min, wherein the mass ratio of the modified bamboo fiber to the dopamine solution to the sodium alginate hydrogel is 1: 5: 5, drying and spinning to obtain a fabric substrate;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion into the round-bottom flask after the stearic acid is completely melted, wherein the dropwise adding rate is 10 drops/min, heating to 160 ℃ after the dropwise adding is completed, reacting for 5 hours, and the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite to stearic acid is 1: 1: 7: 3, cooling to obtain modified montmorillonite; adding sodium alginate hydrogel into the prepared modified montmorillonite, wherein the mass ratio of the modified montmorillonite to the sodium alginate hydrogel is 5: 2, uniformly stirring to prepare a self-made flame-retardant finishing liquid;

(5) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), wherein the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: and 6, slowly stirring while drying, wherein the stirring speed is 200rpm, the temperature is 60 ℃, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 40%, and drying to constant weight to obtain a finished product.

Example 2

The flame-retardant antibacterial towel fabric mainly comprises the following components in parts by weight:

2 parts of bamboo fiber, 8 parts of activating solution, 0.8 part of nano-silver powder, 1.2 parts of dopamine, 16 parts of sodium alginate hydrogel and 20 parts of self-made flame-retardant finishing liquid.

The preparation process of the flame-retardant antibacterial towel fabric comprises the following steps:

(1) grinding bamboo fibers to 80 meshes, and mixing sodium hydroxide, urea and deionized water according to a mass ratio of 7: 10: 70, uniformly mixing to obtain an activation solution, soaking the activation solution in the activation solution for ultrasonic activation, adjusting the frequency to 50kHz and the time to 30min during ultrasonic activation, adjusting the pH to 7 by using 20% sodium sulfate by mass fraction, adding nano-silver powder into the activated bamboo fiber solution, and uniformly stirring, wherein the mass ratio of the bamboo fiber, the activation solution and the nano-silver powder is 1: 4: 0.4, feeding into a double-screw extruder, wherein the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MP under the rotation of the screw, so that a modified spinning melt is prepared;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 20% dopamine solution by mass for 20min, immediately taking out, soaking in sodium alginate hydrogel, taking out after 8min, wherein the mass ratio of the modified bamboo fiber to the dopamine solution to the sodium alginate hydrogel is 1: 6: 6, drying and spinning to obtain a fabric substrate;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion into the round-bottom flask after the stearic acid is completely melted, wherein the dropwise adding rate is 20 drops/min, heating to 180 ℃ after the dropwise adding is completed, reacting for 10 hours, and the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite to stearic acid is 1: 1: 9: 3, cooling to obtain modified montmorillonite; adding sodium alginate hydrogel into the prepared modified montmorillonite, wherein the mass ratio of the modified montmorillonite to the sodium alginate hydrogel is 5: 2, uniformly stirring to prepare a self-made flame-retardant finishing liquid;

(5) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), wherein the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: and 8, slowly stirring while drying, wherein the stirring speed is 400rpm, the temperature is 65 ℃, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 50%, and drying to constant weight to obtain a finished product.

Comparative example 1

The flame-retardant antibacterial towel fabric mainly comprises the following components in parts by weight:

1 part of bamboo fiber, 4 parts of activating solution, 0.2 part of nano-silver powder, 0.5 part of dopamine, 4 parts of sodium alginate hydrogel and 10 parts of self-made flame-retardant finishing liquid.

The preparation process of the flame-retardant antibacterial towel fabric comprises the following steps:

(1) grinding bamboo fibers to 80 meshes, and mixing sodium hydroxide, urea and deionized water according to a mass ratio of 7: 10: 70, uniformly mixing to obtain an activation solution, soaking the activation solution in the activation solution for ultrasonic activation, adjusting the frequency to 30kHz and the time to 50min during ultrasonic activation, adjusting the pH to 7 by using 20% sodium sulfate by mass fraction, adding nano-silver powder into the activated bamboo fiber solution, and uniformly stirring, wherein the mass ratio of the bamboo fiber, the activation solution and the nano-silver powder is 1: 4: 0.2, feeding into a double-screw extruder, wherein the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MP under the rotation of the screw, so that a modified spinning melt is prepared;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 10% dopamine solution for 15min, and taking out, wherein the mass ratio of the modified bamboo fiber to the dopamine solution is 1: 5, drying and spinning to obtain a fabric substrate;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion into the round-bottom flask after the stearic acid is completely melted, wherein the dropwise adding rate is 10 drops/min, heating to 160 ℃ after the dropwise adding is completed, reacting for 5 hours, and the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite to stearic acid is 1: 1: 7: 3, cooling to obtain modified montmorillonite; adding sodium alginate hydrogel into the prepared modified montmorillonite, wherein the mass ratio of the modified montmorillonite to the sodium alginate hydrogel is 5: 2, uniformly stirring to prepare a self-made flame-retardant finishing liquid;

(5) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), wherein the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: and 6, slowly stirring while drying, wherein the stirring speed is 200rpm, the temperature is 60 ℃, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 40%, and drying to constant weight to obtain a finished product.

Comparative example 2

The flame-retardant antibacterial towel fabric mainly comprises the following components in parts by weight:

1 part of bamboo fiber, 4 parts of activating solution, 0.2 part of nano-silver powder, 0.5 part of dopamine, 4 parts of sodium alginate hydrogel and 10 parts of self-made flame-retardant finishing liquid.

The preparation process of the flame-retardant antibacterial towel fabric comprises the following steps:

(1) grinding bamboo fibers to 80 meshes, and mixing sodium hydroxide, urea and deionized water according to a mass ratio of 7: 10: 70, uniformly mixing to obtain an activation solution, soaking the activation solution in the activation solution for ultrasonic activation, adjusting the frequency to 30kHz and the time to 50min during ultrasonic activation, adjusting the pH to 7 by using 20% sodium sulfate by mass fraction, adding nano-silver powder into the activated bamboo fiber solution, and uniformly stirring, wherein the mass ratio of the bamboo fiber, the activation solution and the nano-silver powder is 1: 4: 0.2, feeding into a double-screw extruder, wherein the conditions of the double-screw extruder are as follows: the rotating speed of the extrusion screw is 40r/min, the rotating speed of the feeding screw is 50r/min, the temperature of the first extrusion area is 105 ℃, the temperature of the second extrusion area is 125 ℃, the temperature of the third extrusion area is 115 ℃, and the material pressure in the charging barrel is 30MP under the rotation of the screw, so that a modified spinning melt is prepared;

(2) carrying out melt spinning on the modified spinning melt prepared in the step (1) to prepare modified bamboo fibers;

(3) soaking the modified bamboo fiber in 10% dopamine solution for 10min, immediately taking out, soaking in sodium alginate hydrogel, taking out after 5min, wherein the mass ratio of the modified bamboo fiber to the dopamine solution to the sodium alginate hydrogel is 1: 5: 5, drying and spinning to obtain a fabric substrate;

(4) mixing diethylenetriamine, glacial acetic acid and montmorillonite, and uniformly dispersing by magnetic stirring to prepare a dispersion liquid; putting stearic acid into a round-bottom flask, heating to 100 ℃ in a nitrogen atmosphere, slowly dropwise adding the dispersion into the round-bottom flask after the stearic acid is completely melted, wherein the dropwise adding rate is 10 drops/min, heating to 160 ℃ after the dropwise adding is completed, reacting for 5 hours, and the mass ratio of diethylenetriamine, glacial acetic acid, montmorillonite to stearic acid is 1: 1: 7: 3, preparing a self-made flame-retardant finishing liquid;

(5) soaking the fabric substrate prepared in the step (3) in the self-made flame-retardant finishing liquid prepared in the step (4), wherein the mass ratio of the fabric substrate to the self-made flame-retardant finishing liquid is 1: and 6, slowly stirring while drying, wherein the stirring speed is 200rpm, the temperature is 60 ℃, stopping stirring after the total mass of the fabric substrate and the self-made flame-retardant finishing liquid is reduced by 40%, and drying to constant weight to obtain a finished product.

Effect example 1

The following table 1 shows the results of the analysis of the filtration efficiency of the flame-retardant antibacterial towel fabric using examples 1 and 2 of the present invention and comparative example 2.

TABLE 1

	Filtration efficiency (%)
		Example 1	98
Example 2	97
		Comparative example 1	80

Effect example 2

The following table 2 shows the results of the flame retardant property analysis of the flame retardant antibacterial towel fabrics of examples 1 and 2 and comparative examples 1 and 2 of the present invention

TABLE 2

	Washing 0 th limiting oxygen index (%)	Washing 30 times the limiting oxygen index (%)
			Example 1	33.1	30.4
Example 2	33.5	30.9
			Comparative example 1	30.7	21.7
Comparative example 2	17.6	15.5

Compared with the experimental data of the examples 1 and 2 and the comparative example 2 in the table 1, the experimental data shows that when the flame-retardant and antibacterial towel fabric is prepared, the flame-retardant and antibacterial towel fabric is sequentially soaked in the dopamine solution and the sodium alginate hydrogel, so that the filtering efficiency of the product is improved, and after soaking, one part of the self-prepared flame-retardant finishing liquid is crosslinked on the surface of the fabric substrate, and the other part of the self-prepared flame-retardant finishing liquid is filled in pores of the fabric substrate, so that the density of fibers is improved, and the self-prepared flame-retardant and antibacterial towel fabric has very strong smoke filtering capacity during drying; compared with the experimental data of the comparative example 1 and the examples 1 and 2 in the table 2, it can be obviously found that the flame retardance and the washability of the product can be enhanced by sequentially immersing the flame-retardant antibacterial towel fabric in a dopamine solution and a sodium alginate hydrogel after the fiber is prepared and grafting the sodium alginate in the self-made finishing liquid, so that the flame retardance and the washability of the product can be enhanced, and the flame-retardant antibacterial towel fabric prepared by the self-made finishing agent can be crosslinked when the flame-retardant liquid is finished on the fabric after post-finishing while having the flame-retardant effect, so that the prepared flame-retardant antibacterial towel fabric not only has high flame retardance, but also has washability.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.