Preparation method of elastic warm-keeping woolen fabric

Abstract

The invention discloses a preparation method of an elastic warm-keeping woolen fabric, and relates to the technical field of fabrics. Disulfide bonds among wool fabric fiber peptide chains are opened by utilizing hydrothioacetic acid under the assistance of high temperature, so that binding force among molecules is reduced, then the disulfide bonds are randomly combined under the action of an oxidizing agent to form a curled state, the fabric is indirectly endowed with the elastic property, and the warm-keeping and breathable effects are achieved; then, plasma is used for generating an etching effect on the fiber surface, scales are stripped, oxygen-containing and nitrogen-containing polar groups are introduced, so that the elastic deformation capacity of the fiber is improved, more grooves are formed in the fiber surface along with the increase of the pressure intensity, then nano-zinc oxide is used for filling, and a soybean hollow fiber membrane is compounded, so that the elastic deformation capacity of the fiber is improved. Meanwhile, the zinc oxide particles are fixed on the woolen cloth fibers, infrared rays of a human body are shielded, heat loss is reduced, and therefore the heat retention property of the fabric is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, in particular to a method for preparing a stretch warm woolen fabric. Background Art

[0002] Woolen fabrics are usually made of animal fibers such as wool and rabbit hair, and are usually used to make autumn and winter clothing, scarves, hats and other warm items. Because wool fibers have excellent moisture absorption, softness, and flame retardancy, they are deeply loved by consumers. Therefore, the tweed fabrics on the market are generally woven with wool fibers as the main material.

[0003] Generally, in order to achieve the effect of keeping warm, people will choose relatively thick fabrics, but this will affect the freedom of human movement and also affect the appearance; and wool fibers are very susceptible to damage during textile processing. The fiber spinning, weaving, dyeing, anti-felting and other processing processes reduce the strength, elasticity and other mechanical properties of wool, affecting the wearing life and warmth retention function; therefore, it is particularly necessary to invent a stretch warm woolen fabric. Summary of the invention

[0004] The purpose of the present invention is to provide a stretch warm woolen fabric and a preparation method thereof, so as to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a stretch warm woolen fabric, wherein the stretch warm woolen fabric is made of modified woolen fiber composite hollow fiber membrane.

[0006] Furthermore, the modified woolen fiber is prepared by sequentially treating with thioacetic acid and plasma.

[0007] Furthermore, the hollow fiber membrane is prepared by coaxial electrospinning of soy protein isolate.

[0008] Furthermore, a method for preparing a stretch warm woolen fabric comprises the following preparation steps: (1) Mix woolen fiber, 50 wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water, heat to 80-90°C, react for 10-20 min, add hydrogen peroxide, react for 20-50 min, wash with deionized water for 3-5 times, dry at 50-80°C for 5-8 h, and then place in a vacuum environment of 5 Pa and subject to plasma treatment to obtain modified woolen fiber; (2) The modified woolen fiber, nano zinc oxide and deionized water are mixed in a mass ratio of 5:0.1-0.5:50-100, subjected to 21 kHz ultrasonic treatment for 30-60 min, washed once with deionized water, dried at 50-80° C. for 5-8 h, and woven into a fabric to obtain a woolen fabric; (3) Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat to 40-60°C, stir at 60-120 rpm for 1-3 h, and degas for 3-4 h at a vacuum degree of 80-100 Pa to obtain a shell spinning solution; use air as the core and perform coaxial electrospinning to obtain a hollow fiber membrane; (4) The hollow fiber membrane is compounded with the upper and lower layers of the woolen fabric with a polyurethane adhesive, and treated at 40-80°C and a vacuum degree of 0.5-20Pa for 50-100 minutes to obtain a stretchable warm woolen fabric.

[0009] Furthermore, the woolen fiber in step (1) is prepared by mixing wool fiber, rabbit hair fiber and camel hair fiber in a mass ratio of 7:2:1.

[0010] Furthermore, the plasma treatment conditions in step (1) are: argon atmosphere, pressure of 30-70 Pa, power of 250-900 W, and time of 10-20 min.

[0011] Furthermore, in step (1), the mass ratio of the woolen fiber, 50 wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water, and hydrogen peroxide is 1:8~13:3~5:0.1~0.3:0.8~1.5:70~100:3~6.

[0012] Furthermore, the fabric weight in step (2) is 280-400 g / m 2 .

[0013] Furthermore, the thickness of the hollow fiber membrane in step (3) is 0.03-0.08 mm.

[0014] Furthermore, the process parameters of the coaxial electrospinning in step (3) are as follows: inner needle diameter is 0.41 mm, outer needle diameter is 1.01 mm, voltage is 28 kV, receiving distance is 20 cm, and shell feed rate is 1.5 mL / h.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: The fabric of the invention is made of modified woolen fiber composite hollow fiber membrane to achieve the effects of elasticity, air permeability and warmth preservation.

[0016] First, thioacetic acid is used with the assistance of hydrogen atoms and high temperature to open the disulfide bonds between the peptide chains of the tweed fiber and form cysteine ​​groups, thereby reducing the binding force between molecules. Then, under the action of an oxidant, the cysteine ​​groups are recombined to form disulfide bonds at new positions. At this time, the fibers can expand and contract freely to form a curled state, and can maintain their curl for a long time, indirectly giving the fabric elastic properties and achieving warmth and breathability. Subsequently, high-energy particles in the plasma are used to collide with the hair scales on the surface of the tweed fiber to produce an etching effect, destroying its structure, thereby blunting and blurring the edges of the scales until they peel off. At the same time, oxygen- and nitrogen-containing polar groups are introduced on the fiber surface to increase the elastic deformation capacity of the fiber. As the pressure increases, the number of active particles increases, and more grooves appear on the fiber surface, enhancing friction.

[0017] Secondly, hollow fibers with a loose and porous structure are produced by spinning soybean protein isolate, thereby promoting the air flowability of the matrix and enhancing the breathability of the fabric. After the pores of the woolen fiber are filled with nano zinc oxide, the soybean hollow fiber membrane is composited, and the hollow structure and the curly fiber form two air spaces, thereby isolating the skin from the cold environment and enhancing the warmth retention. At the same time, the zinc oxide particles are fixed on the woolen fiber. The protein functional synergist in the soybean fiber can radiate far infrared rays with the same spectrum as the human biowave spectrum, and act on the human body to produce a resonance activation phenomenon of cells. At the same time, zinc oxide can absorb the heat emitted by the human body and radiate far infrared rays within a certain wavelength range to the human body, which not only promotes blood circulation, but also can shield infrared rays and reduce heat loss, thereby greatly improving the warmth retention of the fabric. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various index testing methods of the elastic warm woolen fabrics prepared in the following examples are as follows: Elasticity: The same size of the embodiment and the comparative example were tested for elastic recovery rate according to GB / T3922.

[0020] Air permeability: Take the embodiment and comparative example of the same size and refer to GB / T5453, use a full-automatic air permeability tester, and test the air permeability at a temperature of 20°C, a relative humidity of 65%, and a pressure difference of 100Pa for 24 hours.

[0021] Warmth retention: Take the same size of the embodiment and the comparative example, irradiate with far infrared rays for 30 minutes at 37°C, and test the surface heating efficiency of the fabric; and refer to the temperature rise value of the fabric in the "Far Infrared Radiation Temperature Rise Test" in GB / T30127.

[0022] Example 1 (1) Wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water are mixed, heated to 80°C, reacted for 10 minutes, hydrogen peroxide is added, reacted for 20 minutes, washed with deionized water for 3 times, dried at 50°C for 5 hours, and then placed in a vacuum environment of 5Pa, argon is introduced, the pressure is set to 30Pa, the power is set to 250W, and the treatment is carried out for 10 minutes to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water and hydrogen peroxide is 1:8:3:0.1:0.8:70:3; (2) The modified woolen fiber, nano zinc oxide and deionized water were mixed in a mass ratio of 5:0.1:50, ultrasonicated at 21kHz for 30min, washed once with deionized water, dried at 50℃ for 5h, and woven into a 280g / m 2 The fabric is woolen fabric; (3) Soy protein isolate, deionized water, and N,N-dimethylacetamide were mixed in a mass ratio of 2:100:50, heated to 40°C, stirred at 60 rpm for 1 h, and degassed at a vacuum of 80 Pa for 3 h to obtain a shell spinning solution; air was used as the core for coaxial electrospinning, and the spinning process parameters were as follows: inner needle diameter of 0.41 mm, outer needle diameter of 1.01 mm, voltage of 28 kV, receiving distance of 20 cm, and shell feed rate of 1.5 mL / h, to obtain a hollow fiber membrane with a thickness of 0.03 mm; (4) The hollow fiber membrane is compounded with the upper and lower layers of the woolen fabric with a polyurethane adhesive, and treated at 40°C and a vacuum degree of 0.5 Pa for 50 minutes to obtain a stretchable and warm woolen fabric.

[0023] Example 2 (1) Wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water are mixed, heated to 85°C, reacted for 15 minutes, hydrogen peroxide is added, reacted for 30 minutes, washed with deionized water for 4 times, dried at 65°C for 6 hours, and then placed in a vacuum environment of 5Pa, argon is introduced, the pressure is set to 50Pa, the power is 500W, and the treatment is carried out for 15 minutes to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water and hydrogen peroxide is 1:11:4:0.2:1.2:85:4.5; (2) The modified woolen fiber, nano zinc oxide and deionized water were mixed in a mass ratio of 5:0.3:75, ultrasonicated at 21kHz for 45min, washed once with deionized water, dried at 62℃ for 6h, and woven into a 340g / m 2 The fabric is woolen fabric; (3) Soy protein isolate, deionized water, and N,N-dimethylacetamide were mixed in a mass ratio of 2:100:50, heated to 50°C, stirred at 90 rpm for 2 h, and degassed at a vacuum of 90 Pa for 3.5 h to obtain a shell spinning solution; air was used as the core for coaxial electrospinning, and the spinning process parameters were as follows: inner needle diameter of 0.41 mm, outer needle diameter of 1.01 mm, voltage of 28 kV, receiving distance of 20 cm, and shell feed rate of 1.5 mL / h, to obtain a hollow fiber membrane with a thickness of 0.06 mm; (4) The hollow fiber membrane is compounded with the upper and lower layers of woolen fabric, and treated at 60°C and a vacuum degree of 10 Pa for 60 minutes to obtain a stretchable and warm woolen fabric.

[0024] Example 3 (1) Wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water are mixed, heated to 90°C, reacted for 20 minutes, hydrogen peroxide is added, reacted for 50 minutes, washed with deionized water for 5 times, dried at 80°C for 8 hours, and then placed in a vacuum environment of 5Pa, argon is introduced, the pressure is set to 70Pa, the power is set to 900W, and the treatment is carried out for 20 minutes to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water and hydrogen peroxide is 1:13:5:0.3:1.5:100:6; (2) The modified woolen fiber, nano zinc oxide and deionized water were mixed in a mass ratio of 5:0.5:100, ultrasonicated at 21kHz for 60min, washed once with deionized water, dried at 80℃ for 8h, and woven into a 400g / m2 The fabric is woolen fabric; (3) Soy protein isolate, deionized water, and N,N-dimethylacetamide were mixed in a mass ratio of 2:100:50, heated to 60°C, stirred at 120 rpm for 3 h, and degassed at a vacuum of 100 Pa for 4 h to obtain a shell spinning solution; air was used as the core for coaxial electrospinning, and the spinning process parameters were as follows: inner needle diameter of 0.41 mm, outer needle diameter of 1.01 mm, voltage of 28 kV, receiving distance of 20 cm, and shell feed rate of 1.5 mL / h, to obtain a hollow fiber membrane with a thickness of 0.08 mm; (4) The hollow fiber membrane is compounded with the upper and lower layers of the woolen fabric with a polyurethane adhesive, and treated at 80°C and a vacuum degree of 20 Pa for 100 min to obtain a stretchable and warm woolen fabric.

[0025] Comparative Example 1 The difference between Comparative Example 1 and Example 2 is that step (1) is different. Step (1) is changed to: wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; the woolen fiber is placed in an environment with a vacuum degree of 5 Pa, argon gas is introduced, the pressure is set to 50 Pa, the power is set to 500 W, and the treatment is carried out for 15 minutes to obtain modified woolen fiber; the remaining steps are the same as Example 2.

[0026] Comparative Example 2 The difference between Comparative Example 2 and Example 2 is that step (1) is different. Step (1) is changed to: wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; woolen fiber, 50wt% hydrothioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water are mixed, the temperature is raised to 85°C, the reaction is carried out for 15 minutes, hydrogen peroxide is added, the reaction is carried out for 30 minutes, the fiber is washed with deionized water for 4 times, and the fiber is dried at 65°C for 6 hours to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% hydrothioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water and hydrogen peroxide is 1:11:4:0.2:1.2:85:4.5; the remaining steps are the same as those in Example 2.

[0027] Comparative Example 3 The difference between Comparative Example 3 and Example 2 is that step (2) is different. Step (2) is changed to: weave the modified woolen fiber into a gram weight of 340 g / m 2 The remaining steps are the same as those in Example 2.

[0028] Comparative Example 4 The difference between Comparative Example 4 and Example 2 is that step (3) is different. Step (3) is changed to: mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat to 50°C, stir at 90rpm for 2h, degas for 3.5h under a vacuum of 90Pa, and electrospin. The spinning process parameters are as follows: needle diameter of 1.01mm, voltage of 28kV, receiving distance of 20cm, and feed rate of 1.5mL / h, to obtain a fiber membrane with a thickness of 0.06mm; the remaining steps are the same as those in Example 2.

[0029] Comparative Example 5 The difference between Comparative Example 5 and Example 2 is that step (3) and step (4) are omitted; the remaining steps are the same as those of Example 2.

[0030] Effect example Table 1 below shows the performance analysis results of the stretch warm woolen fabrics of Examples 1 to 3 of the present invention and Comparative Examples 1 to 5.

[0031] Table 1

[0032] From the comparison of the experimental data of the embodiment and the comparative example in Table 1, it can be found that the present invention uses thioacetic acid to open the disulfide bonds between the peptide chains of the woolen fiber through hydrogen atoms and high temperature to form cysteine ​​groups, thereby reducing the binding force between molecules. Then, under the action of the oxidant, the cysteine ​​groups are recombined to form disulfide bonds at new positions. At this time, the fiber is curled, thereby giving the fabric elastic properties and achieving warmth and breathability. Subsequently, plasma is used to collide with the hair scales to produce an etching effect, thereby passivating and blurring the edges of the scales until they are peeled off. At the same time, oxygen-containing and nitrogen-containing polar groups are introduced on the fiber surface to increase the elastic deformation capacity of the fiber. As the pressure increases, the fiber is deformed. As the thickness of the fiber increases, more grooves appear on the fiber surface to enhance friction and fill it with nano zinc oxide. Then, the composite soybean hollow fiber membrane is added to enhance the breathability of the fabric. In addition, the hollow structure and the curly fiber form two air spaces, thereby isolating the skin from the cold environment and enhancing warmth retention. At the same time, the zinc oxide particles are fixed on the woolen fiber. The protein functional oxytocin in the soybean fiber can radiate far infrared rays with the same spectrum as the human biowave spectrum, and act on the human body to produce a resonance activation phenomenon of cells. At the same time, zinc oxide absorbs the heat emitted by the human body, which not only promotes blood circulation, but also shields infrared rays and reduces heat loss, thereby greatly improving the warmth retention of the fabric.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing a stretch warm woolen fabric, characterized in that: The method comprises the following preparation steps: (1) Wool fiber, rabbit hair fiber and camel hair fiber are mixed in a mass ratio of 7:2:1 to obtain woolen fiber; woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water are mixed, heated to 85°C, reacted for 15 minutes, hydrogen peroxide is added, reacted for 30 minutes, washed with deionized water for 4 times, dried at 65°C for 6 hours, and then placed in a vacuum environment of 5Pa, argon is introduced, the pressure is set to 50Pa, the power is 500W, and the treatment is carried out for 15 minutes to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea, deionized water and hydrogen peroxide is 1:11:4:0.2:1.2:85:4.5; (2) The modified woolen fiber, nano zinc oxide and deionized water were mixed in a mass ratio of 5:0.3:75, ultrasonicated at 21kHz for 45min, washed once with deionized water, dried at 62℃ for 6h, and woven into a 340g / m 2 The fabric is woolen fabric; (3) Soy protein isolate, deionized water, and N,N-dimethylacetamide were mixed in a mass ratio of 2:100:50, heated to 50°C, stirred at 90 rpm for 2 h, and degassed at a vacuum of 90 Pa for 3.5 h to obtain a shell spinning solution; air was used as the core for coaxial electrospinning, and the spinning process parameters were as follows: inner needle diameter of 0.41 mm, outer needle diameter of 1.01 mm, voltage of 28 kV, receiving distance of 20 cm, and shell feed rate of 1.5 mL / h, to obtain a hollow fiber membrane with a thickness of 0.06 mm; (4) The hollow fiber membrane is compounded with the upper and lower layers of woolen fabric, and treated at 60°C and a vacuum degree of 10 Pa for 60 minutes to obtain a stretchable and warm woolen fabric.

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