A kind of apocynum fiber blended yarn and preparation method thereof

Abstract

The invention relates to the field of apocynum fiber, and in particular to a apocynum fiber blended yarn and a preparation method thereof. The invention obtains the apocynum fiber blended yarn by blending apocynum fiber strip 1 and apocynum fiber strip 2. The compounding of polyacrylate and apocynum fiber in the apocynum fiber strip 1 makes the obtained blended yarn have good softness, moisture absorption and air permeability and antibacterial properties, while the compounding of polyurethane and apocynum fiber in the apocynum fiber strip 2 gives the blended yarn better resilience and antibacterial properties. In addition, the graphene powder in the blended yarn makes the finally prepared blended yarn have good warmth retention, and after heat treatment, the wear resistance of the finally obtained apocynum fiber blended yarn is significantly increased. In addition, the carbon fiber powder makes the apocynum fiber blended yarn have less friction with each other, making it smoother in the subsequent weaving process, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the field of apocynum fiber, and in particular to apocynum fiber blended yarn and a preparation method thereof. Background Art

[0002] Luobu hemp, also known as wild hemp, lacquer hemp, red willow seed, etc., is the most distinctive fiber crop in the northwest region. It is mainly distributed in Xinjiang, Shaanxi, Shanxi, Gansu, Qinghai and other places. The harvested Luobu hemp can be used as high-quality textile raw materials after peeling, separation and processing into fiber strips. Luobu hemp fiber is flexible and slender, and its quality is better than flax and ramie fiber. The cross-section of Luobu hemp fiber contains cavities of various shapes and cracks in the longitudinal direction. This structure can produce excellent capillary effect, which makes Luobu hemp fiber textiles have good moisture absorption and air permeability. At the same time, Luobu hemp stems and leaves contain Luobu hemp glycosides and a variety of amino acids, so that the textiles produced by it have good antibacterial and health care properties. However, due to the characteristics of Luobu hemp fiber with smooth surface, no longitudinal curling, small cohesion and poor length uniformity, it is easy to spread and difficult to form a net during the spinning process. The hemp falling rate is high and the yarn formation rate is low, which makes the entire spinning process extremely difficult.

[0003] In addition, even after spinning, the wear resistance of the yarn is still poor. In the prior art, the yarn obtained by modifying the apocynum fiber to increase the wear resistance has a certain degree of decrease in resilience and softness, so its application is still greatly limited.

[0004] Therefore, according to the above-mentioned related technologies, it is urgent to develop a blended yarn of apocynum fiber and a preparation method thereof. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a blended yarn of apocynum fiber and a preparation method thereof, so as to provide a blended yarn of apocynum fiber with good wear resistance, good antibacterial property and good strength and elongation performance.

[0006] Based on the above purpose, the present invention provides a blended yarn of apocynum fiber and a preparation method thereof.

[0007] A method for preparing apocynum fiber blended yarn comprises the following steps:

[0008] Step S1. Cut the bast of Apocynum venetum into pieces and soak them in deionized water, stirring them at 75-80° C. for 3.5-4 hours. After the reaction is completed, wash and filter with deionized water until the solution is no longer turbid, to obtain a mixture A;

[0009] Step S2, mixing mixture A with potassium hydroxide solution, stirring at 85-90° C. for 3.5-4 hours, washing with distilled water until neutral after the reaction, immersing the filtered product with anhydrous ethanol, stirring at 45-50° C. for 3.5-4 hours, to obtain mixture B;

[0010] Step S3. immersing the mixture B in a sodium chlorite solution, adjusting the pH to 3-4 with glacial acetic acid, stirring at 65-70° C. for 4.5-5 h, filtering and washing with deionized water to neutrality after the reaction, subjecting the obtained product to plasma treatment, and drying to obtain apocynum venetum cellulose;

[0011] Step S4. dissolving the apocynum cellulose and polyacrylate in N,N-dimethylformamide, ultrasonicating, adding graphene powder and carbon fiber powder, stirring at 35-45° C. for 3.5-4.5 h, to obtain a polyacrylate spinning solution;

[0012] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16-18 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0013] Step S6. dissolving the apocynum cellulose and polyurethane in N,N-dimethylformamide, ultrasonicating, adding graphene powder and carbon fiber powder, stirring at 35-45° C. for 3.5-4.5 h, to obtain a polyurethane spinning solution;

[0014] Step S7. The obtained polyurethane spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16-18 mL / h, and then the obtained product is ventilated and air-dried to obtain apocynum fiber strip 2;

[0015] Step S8. Blending the apocynum fiber strip 1 and the apocynum fiber strip 2 to obtain apocynum fiber blended yarn.

[0016] Preferably, the blending method in step S8 is compact siro spinning.

[0017] Preferably, the size of the fragments in step S1 is 3-5 mm×3-5 mm.

[0018] Preferably, the concentration of the potassium hydroxide solution in step S2 is 0.4-0.6 mol / L.

[0019] Preferably, the concentration of the sodium chlorite solution in step S3 is 0.14-0.16 mol / L.

[0020] Preferably, the gas used in the plasma treatment in step S3 is argon, the gas flow rate is 180-200 mL / min, the treatment time is 2-3 min, the pressure is 4-5 Pa, and the frequency is 13-14 MHz.

[0021] Preferably, the mass ratio of the apocynum cellulose, polyacrylate, N,N-dimethylformamide, graphene powder and carbon fiber powder in step S4 is 18-23:2-4:100-110:5-5.5:1-2.

[0022] Preferably, the mass ratio of the apocynum cellulose, polyurethane, N,N-dimethylformamide, graphene powder and carbon fiber powder in step S6 is 18-23:2-4:100-110:5-5.5:1-2.

[0023] Preferably, in step S8, the usage ratio of the apocynum venetum fiber strip 1 and the apocynum venetum fiber strip 2 is 80-90:10-20.

[0024] A blended yarn of apocynum fiber, characterized in that the blended yarn of apocynum fiber is prepared by the above-mentioned preparation method.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a blended yarn of apocynum fiber and a preparation method thereof. The present invention obtains the blended yarn of apocynum fiber by blending apocynum fiber strip 1 and apocynum fiber strip 2. The compounding of polyacrylate and apocynum fiber in the apocynum fiber strip 1 makes the prepared blended yarn have good softness, moisture absorption and air permeability and antibacterial property, while the compounding of polyurethane and apocynum fiber in the apocynum fiber strip 2 gives the blended yarn better resilience and antibacterial property. In addition, the graphene powder and carbon fiber powder in the blended yarn make the finally prepared blended yarn have good warmth retention and lubricity. Compared with the prior art, the blended yarn provided by the present invention has broad application prospects.

[0027] The apocynum flax fiber strips 1 and apocynum flax fiber strips 2 provided by the present invention will significantly increase the wear resistance of the final apocynum fiber blended yarn after heat treatment during the blending process, and the carbon fiber powder therein will, on this basis, reduce the friction between the apocynum fiber blended yarns, making them smoother in the subsequent weaving process, thereby improving production efficiency. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] The sources and properties of some of the raw materials used in the present invention are as follows:

[0030] The bast bark of Lophatherum venetum comes from Yuli County, Xinjiang.

[0031] Embodiment 1: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0032] S1. Cut the Apocynum venetum bast into pieces of 3 mm×3 mm and soak them in deionized water, stirring them at 75°C for 3.5 h. After the reaction is completed, wash and filter with deionized water until the solution is no longer turbid, to obtain a mixture A;

[0033] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.4 mol / L, and stir at 85°C for 3.5 h. After the reaction is completed, wash with distilled water until neutral, immerse the filtered product in anhydrous ethanol, and stir at 45°C for 3.5 h to obtain a mixture B;

[0034] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.14 mol / L, adjusted to a pH of 3 with glacial acetic acid, stirred at 65°C for 4.5 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 180 mL / min, the treatment time was 2 min, the pressure was 4 Pa, and the frequency was 13 MHz;

[0035] S4. 18 g of apocynum cellulose and 2 g of polyacrylate were dissolved in 100 g of N, N-dimethylformamide, ultrasonicated, and then 5 g of graphene powder and 1 g of carbon fiber powder were added, and stirred at 35 ° C for 3.5 h to obtain a polyacrylate spinning solution;

[0036] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0037] S6. 18 g of apocynum cellulose and 2 g of polyurethane were dissolved in 100 g of N, N-dimethylformamide, ultrasonicated, and then 5 g of graphene powder and 1 g of carbon fiber powder were added, and stirred at 35 ° C for 3.5 h to obtain a polyurethane spinning solution;

[0038] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 16 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0039] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 80:10.

[0040] Embodiment 2: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0041] S1. Cut the Apocynum venetum bast into pieces of 4 mm×4 mm and soak them in deionized water, stirring them at 76° C. for 3.6 h. After the reaction is completed, wash with deionized water and filter until the solution is no longer turbid, to obtain a mixture A;

[0042] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.5 mol / L, and stir at 86°C for 3.6 h. After the reaction is completed, wash with distilled water until neutral, immerse the filtered product in anhydrous ethanol, and stir at 46°C for 3.6 h to obtain a mixture B;

[0043] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.15 mol / L, adjusted to a pH of 3 with glacial acetic acid, stirred at 66°C for 4.6 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 185 mL / min, the treatment time was 2 min, the pressure was 4 Pa, and the frequency was 13 MHz;

[0044] S4. 19 g of apocynum cellulose and 3 g of polyacrylate were dissolved in 102 g of N, N-dimethylformamide, ultrasonicated, and then 5.1 g of graphene powder and 1.2 g of carbon fiber powder were added, and stirred at 37 ° C for 3.7 h to obtain a polyacrylate spinning solution;

[0045] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0046] S6. 19 g of apocynum cellulose and 3 g of polyurethane were dissolved in 102 g of N, N-dimethylformamide, ultrasonicated, and then 5.1 g of graphene powder and 1.2 g of carbon fiber powder were added, and stirred at 37 ° C for 3.7 h to obtain a polyurethane spinning solution;

[0047] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 17 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0048] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 82:12.

[0049] Embodiment 3: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0050] S1. Cut the Apocynum venetum bast into pieces of 5 mm×5 mm and soak them in deionized water, stirring them at 77° C. for 3.7 h. After the reaction is completed, wash and filter with deionized water until the solution is no longer turbid, to obtain a mixture A;

[0051] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.6 mol / L, and stir at 87°C for 3.7 h. After the reaction is completed, wash with distilled water until neutral, immerse the filtered product in anhydrous ethanol, and stir at 47°C for 3.7 h to obtain a mixture B;

[0052] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.16 mol / L, adjusted to a pH of 3 with glacial acetic acid, stirred at 67°C for 4.7 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 190 mL / min, the treatment time was 2 min, the pressure was 4 Pa, and the frequency was 13 MHz;

[0053] S4. 20 g of apocynum cellulose and 4 g of polyacrylate were dissolved in 104 g of N, N-dimethylformamide, ultrasonicated, and then 5.2 g of graphene powder and 1.4 g of carbon fiber powder were added, stirred at 39 ° C for 3.9 h to obtain a polyacrylate spinning solution;

[0054] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 17 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0055] S6. 20 g of apocynum cellulose and 4 g of polyurethane were dissolved in 104 g of N, N-dimethylformamide, ultrasonicated, and then 5.2 g of graphene powder and 1.4 g of carbon fiber powder were added, and stirred at 39 ° C for 3.9 h to obtain a polyurethane spinning solution;

[0056] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 18 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0057] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 84:14.

[0058] Embodiment 4: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0059] S1. Cut the Apocynum venetum bast into pieces of 3 mm×3 mm and soak them in deionized water, stirring them at 78° C. for 3.8 h. After the reaction is completed, wash with deionized water and filter until the solution is no longer turbid to obtain a mixture A;

[0060] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.4 mol / L, and stir at 88°C for 3.8 h. After the reaction is completed, wash with distilled water until neutral, immerse the filtered product in anhydrous ethanol, and stir at 48°C for 3.8 h to obtain a mixture B;

[0061] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.14 mol / L, adjusted to a pH of 4 with glacial acetic acid, stirred at 68°C for 4.8 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 193 mL / min, the treatment time was 3 min, the pressure was 5 Pa, and the frequency was 14 MHz;

[0062] S4. 21 g of apocynum cellulose and 2 g of polyacrylate were dissolved in 106 g of N, N-dimethylformamide, ultrasonicated, and then 5.3 g of graphene powder and 1.6 g of carbon fiber powder were added, stirred at 41 ° C for 4.1 h to obtain a polyacrylate spinning solution;

[0063] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 17 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0064] S6. 21 g of apocynum cellulose and 2 g of polyurethane were dissolved in 106 g of N, N-dimethylformamide, ultrasonicated, and then 5.3 g of graphene powder and 1.6 g of carbon fiber powder were added, and stirred at 41 ° C for 4.1 h to obtain a polyurethane spinning solution;

[0065] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 16 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0066] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 86:16.

[0067] Embodiment 5: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0068] S1. Cut the Apocynum venetum bast into pieces of 4 mm×4 mm and soak them in deionized water, stirring them at 79° C. for 3.9 h. After the reaction is completed, wash with deionized water and filter until the solution is no longer turbid to obtain a mixture A;

[0069] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.5 mol / L, and stir at 89°C for 3.9 h. After the reaction is completed, wash with distilled water until neutral, immerse the filtered product in anhydrous ethanol, and stir at 49°C for 3.9 h to obtain a mixture B;

[0070] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.15 mol / L, adjusted to a pH of 4 with glacial acetic acid, stirred at 69°C for 4.9 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 196 mL / min, the treatment time was 3 min, the pressure was 5 Pa, and the frequency was 14 MHz;

[0071] S4. 22 g of apocynum cellulose and 3 g of polyacrylate were dissolved in 108 g of N, N-dimethylformamide, ultrasonicated, and then 5.4 g of graphene powder and 1.8 g of carbon fiber powder were added, stirred at 43 ° C for 4.3 h to obtain a polyacrylate spinning solution;

[0072] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 18 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0073] S6. 22 g of apocynum cellulose and 3 g of polyurethane were dissolved in 108 g of N, N-dimethylformamide, ultrasonicated, and then 5.4 g of graphene powder and 1.8 g of carbon fiber powder were added, and stirred at 43 ° C for 4.3 h to obtain a polyurethane spinning solution;

[0074] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 17 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0075] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 88:18.

[0076] Embodiment 6: A method for preparing apocynum fiber blended yarn, comprising the following steps:

[0077] S1. Cut the Apocynum venetum bast into pieces of 5 mm×5 mm and soak them in deionized water, stirring them at 80° C. for 4 h. After the reaction is completed, wash with deionized water and filter until the solution is no longer turbid to obtain a mixture A;

[0078] S2. Mix the mixture A with a potassium hydroxide solution having a concentration of 0.6 mol / L, and stir at 90°C for 4 h. After the reaction is completed, wash with distilled water until neutral. Submerge the filtered product with anhydrous ethanol and stir at 50°C for 4 h to obtain a mixture B.

[0079] S3. The mixture B was immersed in a sodium chlorite solution with a concentration of 0.16 mol / L, adjusted to a pH of 4 with glacial acetic acid, stirred at 70°C for 5 h, filtered and washed with deionized water until neutral after the reaction, and the obtained product was subjected to plasma treatment and dried to obtain apocynum cellulose, wherein the gas used in the plasma treatment was argon gas, the gas flow rate was 200 mL / min, the treatment time was 3 min, the pressure was 5 Pa, and the frequency was 14 MHz;

[0080] S4. 23 g of apocynum cellulose and 4 g of polyacrylate were dissolved in 110 g of N, N-dimethylformamide, ultrasonicated, and then 5.5 g of graphene powder and 2 g of carbon fiber powder were added, stirred at 45 ° C for 4.5 h to obtain a polyacrylate spinning solution;

[0081] Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 18 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1;

[0082] S6. 23 g of apocynum cellulose and 4 g of polyurethane were dissolved in 110 g of N, N-dimethylformamide, ultrasonicated, and then 5.5 g of graphene powder and 2 g of carbon fiber powder were added, and stirred at 45 ° C for 4.5 h to obtain a polyurethane spinning solution;

[0083] S7. The obtained polyurethane spinning solution was sucked into a syringe and sprayed from a spinneret into a coagulation bath of deionized water at a rate of 18 mL / h, and the resulting product was ventilated and dried to obtain apocynum fiber strips 2;

[0084] S8. Blending the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 to obtain apocynum fiber blended yarn, wherein the usage ratio of the apocynum ramie fiber strip 1 and the apocynum ramie fiber strip 2 is 90:20.

[0085] Comparative Example 1:

[0086] Compared with Example 1, polyacrylate was not added in the preparation process of the apocynum fiber blended yarn in this comparative example, and the remaining steps and parameters were the same, which will not be repeated in this comparative example. Finally, the apocynum fiber blended yarn was obtained.

[0087] Comparative Example 2:

[0088] Compared with Example 1, polyurethane was not added in the preparation process of the apocynum fiber blended yarn in this comparative example, and the remaining steps and parameters were the same, which will not be repeated in this comparative example. Finally, the apocynum fiber blended yarn was obtained.

[0089] Comparative Example 3:

[0090] Compared with Example 1, the graphene powder was not added in the preparation process of the apocynum fiber blended yarn in this comparative example, and the remaining steps and parameters were the same, which will not be repeated in this comparative example, and finally the apocynum fiber blended yarn was obtained.

[0091] Comparative Example 4:

[0092] Compared with Example 1, in this comparative example, carbon fiber powder was not added during the preparation of the apocynum fiber blended yarn, and the remaining steps and parameters were the same, which will not be repeated in this comparative example, and finally the apocynum fiber blended yarn was obtained.

[0093] Comparative Example 5:

[0094] Compared with Example 1, this comparative example only replaces the "Lobu ramie fiber strip 1" with the "Lobu ramie fiber strip 2", and the remaining steps and parameters are the same, which will not be repeated in this comparative example, and finally the Lobu ramie fiber blended yarn is obtained.

[0095] Comparative Example 6:

[0096] Compared with Example 1, this comparative example only replaces the "Lobu ramie fiber strip 2" with the "Lobu ramie fiber strip 1", and the remaining steps and parameters are the same, which will not be repeated in this comparative example, and finally the Lobu ramie fiber blended yarn is obtained.

[0097] Comparative Example 7:

[0098] Compared with Example 1, this comparative example only adjusts "the usage ratio of apocynum ramie fiber strip 1 and apocynum ramie fiber strip 2 is 80:10" to "the usage ratio of apocynum ramie fiber strip 1 and apocynum ramie fiber strip 2 is 10:80", and the remaining steps and parameters are the same, which will not be repeated in this comparative example, and finally apocynum fiber blended yarn is obtained.

[0099] Performance Test:

[0100] Test environment: Refer to the requirements of GB / T6529-2008 "Standard atmosphere for humidity conditioning and testing of textiles", the test environment temperature is 20℃±2℃, and the relative humidity is 65%±4%;

[0101] Yarn hairiness test: refer to FZ / T01086-2020 "Textile yarn hairiness determination method projection counting method" to test the yarn hairiness. The testing instrument is Uster ZWEIGLE HL400 hairiness tester. The test distance is 400m, the test speed is 400m / min, the test number is 10 times, and the results are averaged.

[0102] Yarn evenness test: refer to GB / T3292.1-2008 "Test method for uneven yarn evenness of textiles Part 1: Capacitance method" to test the yarn evenness. The test instrument is UT-5 USTER yarn evenness tester. The test speed is 400m / min, the time is 1min, the test number is 10 times, and the result is the average value.

[0103] Yarn strength and elongation test: refer to GB / T3916-2013 "Determination of breaking strength and breaking elongation of single yarn in textile package yarn (CRE method)" to test the yarn strength. The testing instrument is YG068C fully automatic single yarn strength tester. The test number is 100 times, the tensile speed is 500m / min, and the results are averaged.

[0104] Yarn wear resistance test: The wear resistance of the yarn was tested in accordance with JJ / F (Textile) 050-2015 "Yarn Wear Resistance Tester Calibration Specification". The test instrument was LFY-109 computerized yarn wear tester. The test number was 60 times, the speed was 60 times / min, the sandpaper number was 600, the weight was 10g, and the results were averaged. The results are shown in Table 1 below.

[0105] Table 1 Summary of experimental results of Examples 1 to 6 and Comparative Examples 1 to 7

[0106] project Harmful hairiness index / root·100m Yarn evenness CV value / % <![CDATA[Yarn breaking strength / cN·tex -1 > Wear times CV / % Average wear times / times Example 1 732 29.49 15.55 8.32 285.7 Example 2 738 29.51 15.62 8.41 285.3 Example 3 736 29.47 15.59 8.45 285.2 Example 4 739 29.55 15.52 8.51 284.9 Example 5 742 29.53 15.57 8.39 284.1 Example 6 745 29.59 15.61 8.49 284.7 Comparative Example 1 902 30.35 12.64 12.74 162.7 Comparative Example 2 951 30.38 12.58 12.96 160.3 Comparative Example 3 878 30.32 12.69 12.69 163.9 Comparative Example 4 839 30.30 12.73 12.57 165.8 Comparative Example 5 925 30.37 12.61 12.85 161.9 Comparative Example 6 1545 30.39 12.41 13.35 156.7 Comparative Example 7 803 30.18 12.98 12.22 170.3

[0107] Data Analysis:

[0108] It can be seen from Table 1 that the blended yarn of the apocynum fiber prepared by the present invention has better strip uniformity, less hairiness, better strength and elongation, and better wear resistance. This may be due to the introduction of polyacrylate in the apocynum fiber strip 1 reinforced with polyacrylate, graphene powder and carbon fiber powder, which makes it have better elasticity and weather resistance. At the same time, the introduction of polyurethane in the apocynum fiber strip 2 reinforced with polyurethane, graphene powder and carbon fiber powder makes it have better elasticity and wear resistance. At the same time, by using a large amount of apocynum fiber strip 1 and a small amount of apocynum fiber strip 2, combined with the complex of graphene powder and carbon fiber powder, The blending is effective, and after heat treatment, a small amount of cross-linking may occur between the polyacrylate, polyurethane and other active ingredients in the system, thereby increasing the cohesion between the fibers. This makes the wear resistance and strength and elongation of the final apocynum fiber blended yarn further improved. The introduction of graphene powder gives the apocynum fiber blended yarn moisture absorption and heat generation, which makes it warm when used in clothing fabrics. In addition, the introduction of carbon fiber powder reduces the friction between the apocynum fiber blended yarns on this basis, making it smoother in the subsequent weaving process and improving production efficiency.

[0109] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0110] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing apocynum fiber blended yarn, characterized in that: The following steps are involved: Step S1. Cut the bast of Apocynum venetum into pieces and soak them in deionized water, stirring them at 75-80° C. for 3.5-4 hours. After the reaction is completed, wash and filter with deionized water until the solution is no longer turbid, to obtain a mixture A; Step S2, mixing mixture A with potassium hydroxide solution, stirring at 85-90° C. for 3.5-4 hours, washing with distilled water until neutral after the reaction, immersing the filtered product with anhydrous ethanol, stirring at 45-50° C. for 3.5-4 hours, to obtain mixture B; Step S3. immersing the mixture B in a sodium chlorite solution, adjusting the pH to 3-4 with glacial acetic acid, stirring at 65-70° C. for 4.5-5 h, filtering and washing with deionized water to neutrality after the reaction, subjecting the obtained product to plasma treatment, and drying to obtain apocynum venetum cellulose; Step S4. dissolving the apocynum cellulose and polyacrylate in N,N-dimethylformamide, ultrasonicating, adding graphene powder and carbon fiber powder, stirring at 35-45° C. for 3.5-4.5 h, to obtain a polyacrylate spinning solution; Step S5. The obtained polyacrylate spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16-18 mL / h, and then the obtained product is ventilated and dried to obtain apocynum fiber strip 1; Step S6. dissolving the apocynum cellulose and polyurethane in N,N-dimethylformamide, ultrasonicating, adding graphene powder and carbon fiber powder, stirring at 35-45° C. for 3.5-4.5 h, to obtain a polyurethane spinning solution; Step S7. The obtained polyurethane spinning solution is sucked into a syringe, and sprayed from a spinneret into a coagulation bath of deionized water at a speed of 16-18 mL / h, and then the obtained product is ventilated and air-dried to obtain apocynum fiber strip 2; Step S8. Blending the apocynum fiber strip 1 and the apocynum fiber strip 2 to obtain apocynum fiber blended yarn.

2. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The size of the fragments in step S1 is 3-5 mm×3-5 mm.

3. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The concentration of the potassium hydroxide solution in step S2 is 0.4-0.6 mol / L.

4. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The concentration of the sodium chlorite solution in step S3 is 0.14-0.16 mol / L.

5. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The gas used in the plasma treatment in step S3 is argon gas, the gas flow rate is 180-200 mL / min, the treatment time is 2-3 min, the pressure is 4-5 Pa, and the frequency is 13-14 MHz.

6. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The mass ratio of the apocynum cellulose, polyacrylate, N,N-dimethylformamide, graphene powder and carbon fiber powder in step S4 is 18-23:2-4:100-110:5-5.5:1-2.

7. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: The mass ratio of the apocynum cellulose, polyurethane, N,N-dimethylformamide, graphene powder and carbon fiber powder in step S6 is 18-23:2-4:100-110:5-5.5:1-2.

8. The method for preparing apocynum fiber blended yarn according to claim 1, characterized in that: In step S8, the usage ratio of the apocynum venetum fiber strip 1 and the apocynum venetum fiber strip 2 is 80-90:10-20.

9. A blended yarn of apocynum fiber, characterized in that: The apocynum fiber blended yarn is prepared by the preparation method according to any one of claims 1 to 8.