A stretchy warm woolen fabric and its preparation method

Abstract

The present invention discloses a stretch thermal woolen fabric and a preparation method thereof, relating to the technical field of fabrics. By using thioglycolic acid and with the assistance of high temperature, the disulfide bonds between the peptide chains of the woolen fibers are opened, thereby reducing the intermolecular binding force. Then, under the action of an oxidizing agent, the disulfide bonds randomly combine to form a curled state, indirectly endowing the fabric with elastic properties and achieving the effects of warmth retention and breathability. Subsequently, plasma is used to etch the fiber surface, causing the scales to peel off and introducing oxygen-containing and nitrogen-containing polar groups, thereby increasing the elastic deformation ability of the fiber. As the pressure increases, more grooves appear on the fiber surface. Then, nano-zinc oxide is used for filling and a soybean hollow fiber membrane is compounded, thereby enhancing the breathability of the fabric and simultaneously fixing the zinc oxide particles on the woolen fibers to shield the infrared rays of the human body and reduce heat loss, thus improving the warmth retention of the fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and particularly to a stretch thermal woolen fabric and a preparation method thereof. Background Art

[0002] Woolen fabrics are usually made of animal fibers such as wool and rabbit hair, and are usually used to make warm supplies such as autumn and winter clothes, scarves, hats, etc. Because wool fibers have excellent hygroscopicity, softness, and flame retardancy, and are deeply loved by consumers, so the woolen fabrics on the market are generally woven with wool fibers as the main material.

[0003] Generally, in order to achieve the warming effect, people will choose relatively thick fabrics, but this will affect the freedom of human movement and also affect the aesthetics; and wool fibers are extremely vulnerable to damage in textile processing, and the fiber spinning, weaving, dyeing, anti-felting and other processing processes reduce the mechanical properties such as strength and elasticity of wool, affecting the service life and warming function; therefore, it is particularly necessary to invent a stretch thermal woolen fabric. Summary of the Invention

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

[0005] To solve the above technical problems, the present invention provides the following technical solution: a stretch thermal woolen fabric, which is prepared from modified woolen fibers and a composite hollow fiber membrane.

[0006] Further, the modified woolen fibers are prepared by sequentially treating with thioglycolic acid and plasma.

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

[0008] Further, a preparation method of a stretch thermal woolen fabric includes the following preparation steps:

[0009] (1) Mix woolen fibers, 50wt% aqueous thioglycolic acid solution, ammonia water, sodium 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 3-5 times, dry at 50-80°C for 5-8 h, and then place in an environment with a vacuum degree of 5 Pa and treat with plasma to obtain modified woolen fibers;

[0010] (2) Mix the modified woolen fibers, nano-zinc oxide, and deionized water according to a mass ratio of 5:0.1-0.5:50-100, perform ultrasonic treatment at 21 kHz for 30-60 min, wash with deionized water once, dry at 50-80°C for 5-8 h, and weave into a fabric to obtain a woolen fabric;

[0011] (3) Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50. Heat the mixture to 40 - 60°C and stir at 60 - 120 rpm for 1 - 3 h. Then, degas for 3 - 4 h under a vacuum of 80 - 100 Pa to obtain the shell spinning solution. Use air as the core and perform coaxial electrospinning to obtain a hollow fiber membrane.

[0012] (4) Composite the hollow fiber membrane on the upper and lower layers of the woolen fabric with polyurethane adhesive. Treat the fabric at 40 - 80°C and a vacuum of 0.5 - 20 Pa for 50 - 100 min to obtain the elastic and warm woolen fabric.

[0013] Further, the woolen fiber described in step (1) is prepared by mixing wool fiber, rabbit hair fiber, and camel hair fiber in a mass ratio of 7:2:1.

[0014] Further, the plasma treatment conditions in step (1) are as follows: argon atmosphere, pressure of 30 - 70 Pa, power of 250 - 900 W, and time of 10 - 20 min.

[0015] Further, the mass ratio of the woolen fiber, 50 wt% thioglycolic acid aqueous solution, ammonia water, sodium pyrophosphate, urea, deionized water, and hydrogen peroxide described in step (1) is 1:8 - 13:3 - 5:0.1 - 0.3:0.8 - 1.5:70 - 100:3 - 6.

[0016] Further, the fabric grammage in step (2) is 280 - 400 g / m 2

[0017] Further, the thickness of the hollow fiber membrane in step (3) is 0.03 - 0.08 mm.

[0018] Further, 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 layer feeding rate is 1.5 mL / h.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0020] The fabric of the present invention is prepared by compounding modified woolen fiber and a hollow fiber membrane to achieve the effects of elasticity, breathability, and warmth.

[0021] First, with the assistance of hydrogen atoms and high temperature, thioglycolic acid is used to break the disulfide bonds between the peptide chains of wool fibers, forming cysteine groups, thereby reducing the intermolecular binding force. Then, under the action of an oxidant, the cysteine groups recombine to form disulfide bonds at new positions. At this time, the fibers can freely stretch and contract, forming a curly state, and the curl can be maintained for a long time, indirectly endowing the fabric with elastic properties and achieving the effects of warmth retention and breathability. Subsequently, high-energy particles in the plasma collide with the hair scales on the surface of the wool fibers, producing an etching effect, damaging their structure, making the edges of the scales blunt and blurred until they are peeled off. At the same time, oxygen-containing and nitrogen-containing polar groups are introduced onto the fiber surface, increasing the elastic deformation ability of the fiber. As the pressure increases, the number of active particles increases, and more grooves appear on the fiber surface, enhancing the friction force.

[0022] Secondly, soy protein isolate is used for spinning to prepare hollow fibers with a loose and porous structure, thereby promoting the air fluidity of the matrix and enhancing the breathability of the fabric. After filling the pores of the wool fibers with nano-zinc oxide, a composite soy hollow fiber membrane is formed. The hollow structure and the curly fibers form two air spaces, thus isolating the skin from the cold environment and enhancing the warmth retention. At the same time, the zinc oxide particles are fixed on the wool fibers. The protein functional catalyst in the soy fibers can radiate far-infrared rays with the same spectral range as the human bio-wave and act on the human body, generating the resonance activation phenomenon of cells. At the same time, zinc oxide can also radiate far-infrared rays within a certain wavelength range to the human body by absorbing the heat emitted by the human body, not only promoting blood circulation but also blocking infrared rays and reducing heat loss, thereby greatly enhancing the warmth retention of the fabric. Specific embodiments

[0023] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] To more clearly illustrate the method provided by the present invention, the following examples are used for detailed description. The test methods for each index of the elastic and warm wool fabric produced in the following examples are as follows:

[0025] Elasticity: Take the same-sized examples and comparative examples and conduct an elastic recovery rate test according to GB / T3922.

[0026] Air permeability: Take the same-sized examples and comparative examples and refer to GB / T5453. Use a fully automatic air permeability tester. At a temperature of 20 °C, a relative humidity of 65%, a pressure difference of 100 Pa, and place for 24 h to test its air permeability rate.

[0027] Thermal insulation: Take the same-sized examples and comparative examples, irradiate them with far-infrared rays at 37°C for 30 minutes, and test the surface temperature rise efficiency of the fabric; and refer to the "Far-infrared irradiation temperature rise test" in GB / T 30127 for the fabric temperature rise value. Example 1

[0028] (1) Mix wool fiber, rabbit hair fiber, and camel hair fiber in a mass ratio of 7:2:1 to obtain woolen fiber; mix the woolen fiber, 50wt% thioglycolic acid aqueous solution, ammonia water, sodium pyrophosphate, urea, and deionized water, heat up to 80°C, react for 10 minutes, add hydrogen peroxide, react for 20 minutes, wash with deionized water 3 times, dry at 50°C for 5 hours, then place it in an environment with a vacuum of 5 Pa, introduce argon, set the pressure to 30 Pa and the power to 250 W, and treat for 10 minutes to obtain modified woolen fiber; the mass ratio of woolen fiber, 50wt% thioglycolic acid aqueous solution, ammonia water, sodium pyrophosphate, urea, deionized water, and hydrogen peroxide is 1:8:3:0.1:0.8:70:3;

[0029] (2) Mix the modified woolen fiber, nano-zinc oxide, and deionized water in a mass ratio of 5:0.1:50, ultrasonicate at 21 kHz for 30 minutes, wash with deionized water once, dry at 50°C for 5 hours, and weave it into a fabric with a gram weight of 280 g / m 2 to obtain a woolen fabric;

[0030] (3) Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat up to 40°C, stir at 60 rpm for 1 hour, and defoam at a vacuum of 80 Pa for 3 hours to obtain a shell spinning solution; use air as the core and perform coaxial electrospinning. The spinning process parameters are: the inner needle diameter is 0.41 mm, the outer needle diameter is 1.01 mm, the voltage is 28 kV, the receiving distance is 20 cm, and the shell feeding rate is 1.5 mL / h to obtain a hollow fiber membrane with a thickness of 0.03 mm;

[0031] (4) Composite the hollow fiber membrane on the upper and lower layers of the woolen fabric with polyurethane adhesive, and treat it at 40°C and a vacuum of 0.5 Pa for 50 minutes to obtain a stretch thermal insulation woolen fabric. Example 2

[0032] (1) Mix wool fibers, rabbit hair fibers, and camel hair fibers in a mass ratio of 7:2:1 to obtain woolen fibers. Mix the woolen fibers, 50 wt% aqueous thioglycolic acid solution, ammonia water, sodium pyrophosphate, urea, and deionized water, heat up to 85 °C, react for 15 min, add hydrogen peroxide, react for 30 min, wash 4 times with deionized water, dry at 65 °C for 6 h, then place in an environment with a vacuum of 5 Pa, introduce argon, set the pressure to 50 Pa and the power to 500 W, and process for 15 min to obtain modified woolen fibers. The mass ratio of woolen fibers, 50 wt% aqueous thioglycolic acid solution, ammonia water, sodium pyrophosphate, urea, deionized water, and hydrogen peroxide is 1:11:4:0.2:1.2:85:4.5;

[0033] (2) Mix the modified woolen fibers, nano-zinc oxide, and deionized water in a mass ratio of 5:0.3:75, ultrasonicate at 21 kHz for 45 min, wash 1 time with deionized water, dry at 62 °C for 6 h, and weave into a fabric with a gram weight of 340 g / m 2 to obtain a woolen fabric;

[0034] (3) Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat up to 50 °C, stir at 90 rpm for 2 h, and degas at a vacuum of 90 Pa for 3.5 h to obtain a shell spinning solution. Use air as the core and perform coaxial electrospinning. The electrospinning process parameters are: 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 feeding rate of 1.5 mL / h to obtain a hollow fiber membrane with a thickness of 0.06 mm;

[0035] (4) Composite the hollow fiber membrane on the upper and lower layers of the woolen fabric, and process at 60 °C and a vacuum of 10 Pa for 60 min to obtain an elastic and warm woolen fabric. Example 3

[0036] (1) Mix wool fibers, rabbit hair fibers, and camel hair fibers in a mass ratio of 7:2:1 to obtain woolen fibers. Mix the woolen fibers, 50 wt% aqueous thioglycolic acid solution, ammonia water, sodium pyrophosphate, urea, and deionized water, heat up to 90 °C, react for 20 min, add hydrogen peroxide, react for 50 min, wash 5 times with deionized water, dry at 80 °C for 8 h, then place in an environment with a vacuum of 5 Pa, introduce argon, set the pressure to 70 Pa and the power to 900 W, and process for 20 min to obtain modified woolen fibers. The mass ratio of woolen fibers, 50 wt% aqueous thioglycolic acid solution, ammonia water, sodium pyrophosphate, urea, deionized water, and hydrogen peroxide is 1:13:5:0.3:1.5:100:6;

[0037] (2) Mix the modified wool fiber, nano-zinc oxide, and deionized water in a mass ratio of 5:0.5:100, ultrasonicate at 21 kHz for 60 min, wash once with deionized water, dry at 80 °C for 8 h, and weave into a fabric with a gram weight of 400 g / m 2 to obtain a woolen fabric;

[0038] (3) Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat to 60 °C, stir at 120 rpm for 3 h, defoam at a vacuum of 100 Pa for 4 h to obtain a shell spinning solution; Use air as the core for coaxial electrospinning. The electrospinning process parameters are: 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 feeding rate is 1.5 mL / h to obtain a hollow fiber membrane with a thickness of 0.08 mm;

[0039] (4) Composite the hollow fiber membrane on the upper and lower layers of the woolen fabric with polyurethane adhesive, and treat at 80 °C and a vacuum of 20 Pa for 100 min to obtain an elastic warm woolen fabric.

[0040] Comparative Example 1

[0041] The difference between Comparative Example 1 and Example 2 is that step (1) is different. Modify step (1) as follows: Mix wool fiber, rabbit hair fiber, and camel hair fiber in a mass ratio of 7:2:1 to obtain wool fiber; Place the wool fiber in an environment with a vacuum of 5 Pa, introduce argon, and place it at a pressure of 50 Pa and a power of 500 W for 15 min to obtain modified wool fiber; The remaining steps are the same as in Example 2.

[0042] Comparative Example 2

[0043] The difference between Comparative Example 2 and Example 2 is that step (1) is different. Modify step (1) as follows: Mix wool fiber, rabbit hair fiber, and camel hair fiber in a mass ratio of 7:2:1 to obtain wool fiber; Mix the wool fiber, 50 wt% thioglycolic acid aqueous solution, ammonia water, sodium pyrophosphate, urea, and deionized water, heat to 85 °C, react for 15 min, add hydrogen peroxide, react for 30 min, wash 4 times with deionized water, and dry at 65 °C for 6 h to obtain modified wool fiber; The mass ratio of wool fiber, 50 wt% thioglycolic acid aqueous solution, ammonia water, sodium 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 in Example 2.

[0044] Comparative Example 3

[0045] The difference between Comparative Example 3 and Example 2 is that step (2) is different. Modify step (2) as follows: Weave the modified wool fiber into a fabric with a gram weight of 340 g / m 2For the fabric, obtain woolen fabric; the remaining steps are the same as in Example 2.

[0046] Comparative Example 4

[0047] The difference between Comparative Example 4 and Example 2 lies in step (3). Modify step (3) as follows: Mix soy protein isolate, deionized water, and N,N-dimethylacetamide in a mass ratio of 2:100:50, heat to 50°C, stir at 90 rpm for 2 h, defoam for 3.5 h under a vacuum of 90 Pa, and perform electrospinning. The spinning process parameters are: needle diameter of 1.01 mm, voltage of 28 kV, receiving distance of 20 cm, and feeding rate of 1.5 mL / h to obtain a fiber membrane with a thickness of 0.06 mm; the remaining steps are the same as in Example 2.

[0048] Comparative Example 5

[0049] The difference between Comparative Example 5 and Example 2 is that steps (3) and (4) are absent; the remaining steps are the same as in Example 2.

[0050] Effect Example

[0051] The following Table 1 gives the performance analysis results of the elastic warm woolen fabrics using Examples 1 to 3 and Comparative Examples 1 to 5 of the present invention.

[0052] Table 1

[0053]

[0054] It can be found from the comparison of the experimental data of the examples and comparative examples in Table 1 that the present invention uses thioglycolic acid to open the disulfide bonds between the woolen fiber peptide chains through hydrogen atoms and high-temperature assistance to form cysteine groups, thereby reducing the intermolecular binding force. Then, under the action of an oxidant, the cysteine groups are recombined to form disulfide bonds at new positions. At this time, the fibers form curls, thereby endowing the fabric with elastic properties and achieving warm and breathable effects. Subsequently, the plasma collides with the hair scales to produce an etching effect, thereby blunting 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 ability of the fiber. As the pressure increases, more grooves appear on the fiber surface to enhance the friction force. Nano-zinc oxide is used for filling, and then a composite soy hollow fiber membrane is used to enhance the breathable effect of the fabric. Moreover, the hollow structure and the curly fibers 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 fibers. The protein functional catalyst in the soy fiber can radiate far-infrared rays with the same spectral range as the human bio-wave 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, not only promoting blood circulation but also shielding infrared rays and reducing heat loss, thereby greatly improving the warmth retention of the fabric.

[0055] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any respect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A method for preparing a stretch warm woolen fabric, characterized in that: The method comprises the following preparation steps: (1) Mix woolen fiber, 50 wt% thioacetic acid aqueous solution, ammonia water, tetrasodium pyrophosphate, urea and deionized water, and heat to 80 ~ 90℃, react for 10~20min, add hydrogen peroxide, react for 20~50min, wash with deionized water 3~5 times, dry at 50~80℃ for 5 ~ 8h, then placed in a vacuum environment of 5Pa and treated with plasma 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; Air is used as the core for 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.

2. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: 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.

3. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: 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.

4. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: In step (1), the mass ratio of the woolen fiber, 50wt% 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.

5. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: The fabric weight in step (2) is 280-400 g / m 2 .

6. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: The thickness of the hollow fiber membrane in step (3) is 0.03-0.08 mm.

7. The method for preparing a stretch warm woolen fabric according to claim 1, characterized in that: 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.

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