Mothproof and antibacterial wool yarn and preparation method thereof

Abstract

The invention belongs to the technical field of textile, and relates to a preparation method of wool yarn, in particular to mothproof and antibacterial wool yarn and a preparation method thereof. The wool yarn disclosed by the invention is prepared by spinning and processing wool subjected to scale removal treatment, antibacterial treatment and mothproof treatment, and has antibacterial property, mothproof property, excellent dyeing effect and light transmission.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles and relates to a method for preparing wool yarn, in particular to moth-proof and antibacterial wool yarn and a method for preparing the same. Background Art

[0002] As a natural textile material, wool yarn is very popular in the market and is widely used in clothing and home textiles due to its excellent warmth retention, breathability and comfort. However, there are still some shortcomings in the production and processing technology of wool yarn, such as susceptibility to insect erosion, resulting in relatively low durability; wool yarn is susceptible to bacterial erosion in terms of antibacterial properties, resulting in fiber deterioration and odor, especially in humid and warm environments, this lack of antibacterial properties may be aggravated; during the dyeing process, wool fiber's affinity for dyes is not as good as some synthetic fibers, making dyeing uniformity and color saturation a technical challenge; in addition, in the hot summer, wool yarn may lead to insufficient breathability due to its natural curling structure and high hygroscopicity, making it difficult for moisture to evaporate quickly, which may make the skin feel stuffy and airtight when worn at high temperatures. Therefore, it is particularly important to develop a wool yarn with anti-moth and antibacterial properties. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a moth-proof and antibacterial wool yarn, which has excellent dyeing effect and light transmittance in addition to moth-proof and antibacterial properties.

[0004] In a first aspect, the present invention provides a method for preparing moth-proof and antibacterial wool yarn, and the specific method is as follows:

[0005] S1. Wool pretreatment: Take fresh wool, first use a loosening carding machine to loosen it to remove large impurities in the wool; soak the loosened wool in clean water to remove some soluble impurities and dust in the wool; put the wool soaked in clean water into a degreasing tank, and wash the wool with a mixture of wool-specific detergent and water, repeat 2-3 times to remove organic substances such as grease and sweat on the wool surface, then dehydrate and dry to obtain wool fibers;

[0006] S2. Descaling treatment: the wool fiber prepared in step S1 is placed in the penetrant fatty alcohol polyoxyethylene ether, fully soaked for 5-10 minutes, taken out, adjusted to pH 5, and then added with a potassium permanganate solution with a mass fraction of 8-10% according to a bath ratio of 1:20 to descale the wool fiber for 25-30 minutes; after descaling, the wool fiber is transferred to a sodium bisulfite solution with a mass fraction of 10%, and soaked for 15-20 minutes at a bath ratio of 1:20 for reduction treatment to neutralize the oxidizing effect of potassium permanganate; repeatedly washed with water to remove residual chemicals, dehydrated, and dried to obtain descaled wool fiber;

[0007] S3. Antibacterial treatment: Take the descaled wool fiber prepared in step S2, add NaOH with a bath ratio of 1:40, react at 60-65°C for 25-30min, and dry; add a mixture of polyhexamethylene biguanide and cetylpyridinium chloride solution with a bath ratio of 1:50 and treat the wool fabric at a constant temperature of 50-60°C for 60-80min to obtain antibacterial wool fiber;

[0008] S4. Modification of wormwood: Weigh 5g of wormwood powder, add 8-10 times of water, stir evenly, put it in a water bath, extract it with water at 90-95°C for 2h, filter it after extraction, collect the filtrate to obtain wormwood extract; add 2% v / v cellulase to the wormwood extract obtained above at 45°C, the enzyme activity reaches 30000U / g, perform enzymatic hydrolysis for 2h, then add 1.5% v / v neutral protease, continue enzymatic hydrolysis for 2.5h, wherein the activity of neutral protease is 36000U / g, after the enzymatic hydrolysis is completed, put it in a centrifuge and centrifuge it at 4000r / min for 15-20min to obtain a modified wormwood extract;

[0009] S5. Anti-moth treatment: 6% chitosan solution, 10% fucoidan solution and modified wormwood extract were mixed to obtain an anti-moth liquid; the antibacterial wool fiber prepared in step S3 was added with a bath ratio of 1:40 and the pH value was adjusted to 6, and the fiber was placed in an ultrasonic machine at 80°C for 60 min, and then washed and dried to obtain an antibacterial and anti-moth wool fiber;

[0010] S6. Spinning processing: The antibacterial and moth-proof wool fibers prepared in step S6 are finely combed in a carding machine to separate and sort the fibers and remove impurities; the combed wool fibers are combined into strips on a drawing frame to enhance their length and strength; in a roving frame, the drawn strips are spun into thicker yarns; the rovings are stretched and combed through a fine spinning frame to obtain yarns with higher strength, better uniformity and smoother surface.

[0011] Preferably, the soaking time of the wool in step S1 is 10-15 minutes.

[0012] Preferably, in step S1, the mass ratio of the wool-specific washing liquid to water is 1:5.

[0013] Preferably, in step S1, the washing time for each washing using the wool-specific washing liquid is 20-30 minutes.

[0014] Preferably: after washing with wool-specific washing liquid in step S1, the wool needs to be repeatedly washed with clean water and then dehydrated.

[0015] Preferably, the mass fraction of the penetrant fatty alcohol polyoxyethylene ether in step S2 is 0.1%.

[0016] Preferably, the temperature during the descaling treatment in step S2 is 60°C.

[0017] Preferably, the concentration of the NaOH solution in step S3 is 50 mmol / L.

[0018] Preferably, after the reaction of adding the NaOH solution in step S3 is completed, the mixture needs to be rinsed with deionized water for 15-20 minutes.

[0019] Preferably, in the step S3, the mass ratio of the polyhexamethylene biguanide solution to the cetylpyridinium chloride solution in the mixed solution of the polyhexamethylene biguanide and cetylpyridinium chloride solution is 1:1.

[0020] Preferably, the mass fraction of the polyhexamethylene biguanide solution in step S3 is 3%.

[0021] Preferably, the mass fraction of the cetylpyridinium chloride solution in step S3 is 3%.

[0022] Preferably: in the step S5, the chitosan solution in the mothproofing liquid is prepared with 1% lactic acid, and the fucoidan solution is dissolved in 80° C. water.

[0023] Preferably: the mass ratio of the chitosan solution, the fucoidan solution and the modified wormwood extract in the moth-proofing liquid in step S5 is 2:2:3.

[0024] In a second aspect, the present invention provides anti-moth and anti-bacterial wool yarn produced by the above-mentioned anti-moth and anti-bacterial wool yarn preparation method.

[0025] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0026] 1. The polyhexamethylene biguanide solution and cetylpyridinium chloride solution in the present invention have good antibacterial effect under synergistic action.

[0027] 2. The descaling treatment using potassium permanganate solution in the present invention can improve the dyeing effect of wool yarn.

[0028] 3. The descaling treatment using potassium permanganate solution in the present invention can improve the air permeability of the wool yarn.

[0029] 4. The chitosan solution, fucoidan solution and modified wormwood leaf extract in the present invention work synergistically to have an anti-moth effect.

[0030] 5. The wool yarn prepared in the present invention has good uniformity and a smooth surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a comparison chart of the antibacterial rates of yarns of Example 1 and Comparative Examples 1-2 against Staphylococcus aureus and Escherichia coli. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] In the present invention, wormwood powder, chitosan and fucoidan are all purchased from Shaanxi Lanhe Biotechnology Co., Ltd.; wool-specific washing liquid is purchased from Guangzhou Jiajie Biotechnology Co., Ltd.; polyhexamethylene biguanide and cetylpyridinium chloride are purchased from Longgui Haoting Chemical Raw Materials Business Department, Baiyun District, Guangzhou; cellulase is purchased from Hebei Liqia Biotechnology Co., Ltd.; and neutral protease is purchased from Hebei Qiaqiao Trading Co., Ltd.

[0034] Example 1

[0035] This example demonstrates that the polyhexamethylene biguanide solution and the cetylpyridinium chloride solution have a good antibacterial effect under synergistic action.

[0036] This embodiment provides a method for preparing antibacterial and moth-proof wool yarn, and the specific steps are as follows:

[0037] S1. Wool pretreatment: fresh wool was purchased from Hebei Gemei Industrial Group Co., Ltd., and was first loosened with an opening carding machine to remove large impurities in the wool; the loosened wool was placed in clean water and soaked for 10 minutes to remove some soluble impurities and dust in the wool; the wool soaked in clean water was placed in a degreasing tank and washed with a wool-specific washing liquid with a mass fraction of 20%, and the wool was washed twice, each time for 20 minutes, to remove organic substances such as grease and sweat on the surface of the wool, and then washed repeatedly with clean water, dehydrated, and dried to obtain wool fibers;

[0038] S2. Descaling treatment: Place the wool fiber that has been pretreated and cleaned in step S1 in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soak it for 5 minutes. After soaking, take out the wool fiber and adjust the pH value to 5. At 60°C, place the wool fiber in a potassium permanganate solution with a mass fraction of 8% and perform descaling treatment at a bath ratio of 1:20 for 25 minutes. After descaling, transfer the wool fiber to a sodium bisulfite solution with a mass fraction of 10% and soak it for 15 minutes at a bath ratio of 1:20 for reduction treatment to neutralize the oxidizing effect of potassium permanganate. Thoroughly wash the wool fiber with clean water to remove residual chemicals, then dehydrate and dry it in a vacuum oven at 85°C until the wool fiber reaches constant weight. This process is designed to scientifically and rationally remove scales from the surface of the wool fiber while maintaining the integrity and performance of the fiber.

[0039] S3. Antibacterial treatment: Take the descaled wool fiber prepared in step S2, add 50mmol / LNaOH with a bath ratio of 1:40, react at 60°C for 25min, rinse with deionized water for 15min, and dry; add a mixed solution of 3% polyhexamethylene biguanide solution and 3% cetylpyridinium chloride solution with a bath ratio of 1:50 (wherein the mass ratio of polyhexamethylene biguanide solution to cetylpyridinium chloride solution is 1:1), treat the wool fabric at a constant temperature of 50°C for 60min to obtain antibacterial wool fiber;

[0040] S4. Modification of mugwort: Weigh 5g of mugwort powder, add 8 times of water, stir evenly, put it in a water bath, extract it with water at 95°C for 2h, filter it after extraction, collect the filtrate to obtain mugwort extract; add 2% v / v cellulase to the mugwort extract obtained above at 45°C, the enzyme activity of which reaches 30000U / g, perform enzymatic hydrolysis for 2h, then add 1.5% v / v neutral protease, continue enzymatic hydrolysis for 2.5h, wherein the activity of neutral protease is 36000U / g, after the enzymatic hydrolysis is completed, put it in a centrifuge and centrifuge it at 4000r / min for 15min to obtain a modified mugwort extract;

[0041] S5. Anti-moth treatment: a chitosan solution with a mass fraction of 6% (prepared with 1% lactic acid), a fucoidan solution with a mass fraction of 10% and a modified wormwood extract are uniformly mixed to obtain an anti-moth liquid, wherein the mass ratio of the chitosan solution, the fucoidan solution and the modified wormwood extract is 2:2:3; the wool fiber prepared in step S3 is added with the anti-moth liquid with a bath ratio of 1:40, the pH value is adjusted to 6, and the fiber is placed in an ultrasonic machine at 80°C for 60 minutes, and then washed and dried to obtain an antibacterial and anti-moth wool fiber;

[0042] S6. Spinning processing: The antibacterial and moth-proof wool fibers prepared in step S6 are carefully combed by a carding machine to separate and arrange the fibers, and short fibers and impurities are removed, thereby improving the uniformity and purity of the fibers; the combed wool fibers are combined into strips by a drawing frame to increase the length and strength of the fibers; preliminary spinning is carried out on a woolen frame to convert the drawn strips into thicker yarns, at which time the fibers are moderately stretched to form a preliminary yarn structure; the yarn obtained by woolen spinning is further stretched and combed by a fine spinning frame to improve the strength, uniformity and surface smoothness of the yarn, and finally a yarn with higher strength, better uniformity and smoother surface is obtained.

[0043] Comparative Example 1: In step S3, no polyhexamethylene biguanide solution is added, and the other steps are the same as those in Example 1.

[0044] Comparative Example 2: In step S3, the cetylpyridinium chloride solution was not added, and the other steps were the same as those in Example 1.

[0045] Antimicrobial testing

[0046] Referring to GB / T20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3 Oscillation Method", the TS-200B constant temperature culture oscillator (purchased from Changzhou Jintan Liangyou Instrument Co., Ltd.) was used to test the antibacterial rate of the yarn, and Staphylococcus aureus and Escherichia coli were selected for experimental determination; among them, the product number of Staphylococcus aureus is 33025, and the product number of Escherichia coli is 30051. Both strains were purchased from Beijing Sanyao Technology Co., Ltd. There are three levels of antibacterial performance testing, namely: A-level washing 10 times test, AA-level washing 20 times test, AAA-level washing 50 times test. This experiment was tested according to the requirements of AAA level. The experimental results are as follows Figure 1 shown.

[0047] Figure 1 The figure is a comparison chart of the antibacterial rates of yarns of Example 1 and Comparative Examples 1-2 against Staphylococcus aureus and Escherichia coli. As can be seen from the figure, Example 1 is significantly better than Comparative Examples 1-2 against Staphylococcus aureus and Escherichia coli, and the antibacterial rates of Example 1 against Staphylococcus aureus and Escherichia coli are both greater than 95%, showing good antibacterial effects. It is confirmed that the polyhexamethylene biguanide solution and the cetylpyridinium chloride solution have good antibacterial effects under the synergistic effect.

[0048] Example 2

[0049] This example demonstrates that descaling can improve the dyeing effect and air permeability of wool yarn.

[0050] This embodiment provides a method for preparing antibacterial and moth-proof wool yarn, and the specific steps are as follows:

[0051] S1. Wool pretreatment: fresh wool was purchased from Hebei Gemei Industrial Group Co., Ltd., and was first opened with an opening carding machine to remove large impurities in the wool; the opened wool was soaked in clean water for 13 minutes to remove some soluble impurities and dust in the wool; the wool soaked in clean water was placed in a degreasing tank, and the wool was washed with a wool-specific washing liquid with a mass fraction of 20%, and the washing was repeated 3 times, each washing time was 25 minutes, to remove organic substances such as grease and sweat on the surface of the wool, and then washed repeatedly with clean water, dehydrated, and dried to obtain wool fibers;

[0052] S2. Descaling treatment: Place the wool fiber that has been pre-treated and cleaned in step S1 in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soak it for 8 minutes. After soaking, take out the wool fiber and adjust the pH value to 5. At 60°C, place the wool fiber in a 9% potassium permanganate solution and perform descaling treatment at a bath ratio of 1:20 for 28 minutes. After descaling, transfer the wool fiber to a 10% sodium bisulfite solution and soak it for 18 minutes at a bath ratio of 1:20 for reduction treatment to neutralize the oxidizing effect of potassium permanganate. Thoroughly wash the wool fiber with clean water to remove residual chemicals, then dehydrate and dry it in a vacuum oven at 85°C until the wool fiber reaches constant weight. This process is designed to scientifically and rationally remove scales from the surface of the wool fiber while maintaining the integrity and performance of the fiber.

[0053] S3. Antibacterial treatment: Take the descaled wool fiber prepared in step S2, add 50mmol / LNaOH with a bath ratio of 1:40, react at 63°C for 28min, rinse with deionized water for 18min, and dry; add a mixed solution of 3% polyhexamethylene biguanide solution and 3% cetylpyridinium chloride solution with a bath ratio of 1:50 (wherein the mass ratio of polyhexamethylene biguanide solution to cetylpyridinium chloride solution is 1:1), treat the wool fabric at a constant temperature of 55°C for 70min to obtain antibacterial wool fiber;

[0054] S4. Modification of mugwort: Weigh 5g of mugwort powder, add 10 times of water, stir evenly, put it in a water bath, extract it with water at 90°C for 2h, filter it after extraction, collect the filtrate to obtain mugwort extract; add 2% v / v cellulase to the mugwort extract obtained above at 45°C, the enzyme activity of which reaches 30000U / g, perform enzymatic hydrolysis for 2h, then add 1.5% v / v neutral protease, continue enzymatic hydrolysis for 2.5h, wherein the activity of neutral protease is 36000U / g, after the enzymatic hydrolysis is completed, put it in a centrifuge and centrifuge it at 4000r / min for 15min to obtain a modified mugwort extract;

[0055] S5. Anti-moth treatment: a chitosan solution with a mass fraction of 6% (prepared with 1% lactic acid), a fucoidan solution with a mass fraction of 10% and a modified wormwood extract are uniformly mixed to obtain an anti-moth liquid, wherein the mass ratio of the chitosan solution, the fucoidan solution and the modified wormwood extract is 2:2:3; the wool fiber prepared in step S3 is added with the anti-moth liquid with a bath ratio of 1:40, the pH value is adjusted to 6, and the fiber is placed in an ultrasonic machine at 80°C for 60 minutes, and then washed and dried to obtain an antibacterial and anti-moth wool fiber;

[0056] S6. Spinning processing: The antibacterial and moth-proof wool fibers prepared in step S6 are carefully combed by a carding machine to separate and arrange the fibers, and short fibers and impurities are removed, thereby improving the uniformity and purity of the fibers; the combed wool fibers are combined into strips by a drawing frame to increase the length and strength of the fibers; preliminary spinning is carried out on a woolen frame to convert the drawn strips into thicker yarns, at which time the fibers are moderately stretched to form a preliminary yarn structure; the yarn obtained by woolen spinning is further stretched and combed by a fine spinning frame to improve the strength, uniformity and surface smoothness of the yarn, and finally a yarn with higher strength, better uniformity and smoother surface is obtained.

[0057] Comparative Example 3: No descaling treatment is performed, step S2 is removed, and the other steps are the same as those in Example 2.

[0058] Dyeing effect and air permeability test:

[0059] (1) Dyeing effect test

[0060] Take 1 part of wool yarn and add 50 parts of 2% (by yarn weight) weak acid Pra Red B dye solution, and dye it in a pH 4.5 environment. The dyeing process starts at 50°C and gradually increases to 90°C for dyeing. The K / S value of the wool yarn sample is measured using a visible spectrophotometer to evaluate the dyeing effect. The experimental results are shown in Table 1.

[0061] (2) Air permeability test

[0062] Referring to GB / T5453-1997 “Determination of Air Permeability of Textile Fabrics”, an air permeability tester was used to measure the gas flow rate vertically passing through a given sample area within a certain period of time. The experimental results are shown in Table 1.

[0063] Table 1 Measurement results of wool yarn K / S value and air permeability

[0064] category K / S value <![CDATA[Air permeability (L / (m 2 ·s))]]> Example 2 Group 29.67 379.38 Comparative Example 3 22.59 355.45

[0065] K / S value, or color depth value, is an indicator to measure the color depth of the dyed fabric surface, which directly affects the intensity and uniformity of the dyeing effect of wool yarn. The higher the K / S value, the darker the dyed color, the fuller the color, and the better the dyeing effect. Air permeability is an important indicator to measure the breathability of wool yarn, reflecting the ability of yarn to allow air to pass through. The higher the air permeability, the better the breathability of the wool yarn, and the more comfortable ventilation effect it can provide when wearing.

[0066] Table 1 is a comparison table of K / S values ​​and air permeability of wool yarns of Example 2 and Comparative Example 3. As can be seen from Table 1, the K / S value of Example 2 is 29.67, and the K / S value of Comparative Example 3 is 22.59. The K / S value of Example 2 is significantly higher than that of Comparative Example 3, indicating that Example 2 has the best dyeing effect.

[0067] The air permeability of Example 2 group is 379.38 L / (m2·s), and the air permeability of Comparative Example 3 group is 355.45 L / (m2·s). The air permeability of Example 2 group is significantly higher than that of Comparative Example 3 group, indicating that Example 2 group has the best air permeability.

[0068] In summary: the dyeing effect and air permeability of the yarn in Example 2 are the best, which proves that the descaling treatment can improve the dyeing effect and air permeability of the yarn.

[0069] Example 3

[0070] This example demonstrates that the chitosan solution, fucoidan solution and modified wormwood extract have a synergistic effect in preventing moths.

[0071] This embodiment provides a method for preparing antibacterial and moth-proof wool yarn, and the specific steps are as follows:

[0072] S1. Wool pretreatment: fresh wool was purchased from Hebei Gemei Industrial Group Co., Ltd., and was first loosened with an opening carding machine to remove large impurities in the wool; the loosened wool was placed in clean water and soaked for 15 minutes to remove some soluble impurities and dust in the wool; the wool soaked in clean water was placed in a degreasing tank and washed with a wool-specific washing liquid with a mass fraction of 20%, and the wool was washed for 3 times, each washing time was 30 minutes, to remove organic substances such as grease and sweat on the surface of the wool, and then washed repeatedly with clean water, dehydrated, and dried to obtain wool fibers;

[0073] S2. Descaling treatment: Place the wool fiber that has been pre-treated and cleaned in step S1 in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soak it for 10 minutes. After soaking, take out the wool fiber and adjust the pH value to 5. At 60°C, place the wool fiber in a 10% potassium permanganate solution and perform descaling treatment at a bath ratio of 1:20 for 30 minutes. After descaling, transfer the wool fiber to a 10% sodium bisulfite solution and soak it for 20 minutes at a bath ratio of 1:20 for reduction treatment to neutralize the oxidizing effect of potassium permanganate. Thoroughly wash the wool fiber with clean water to remove residual chemicals, then dehydrate and dry it in a vacuum oven at 85°C until the wool fiber reaches constant weight. This process is designed to scientifically and rationally remove scales from the surface of the wool fiber while maintaining the integrity and performance of the fiber.

[0074] S3. Antibacterial treatment: Take the descaled wool fiber prepared in step S2, add 50mmol / LNaOH with a bath ratio of 1:40, react at 65°C for 30min, rinse with deionized water for 20min, and dry; add a mixed solution of 3% polyhexamethylene biguanide solution and 3% cetylpyridinium chloride solution with a bath ratio of 1:50 (wherein the mass ratio of polyhexamethylene biguanide solution to cetylpyridinium chloride solution is 1:1), treat the wool fabric at a constant temperature of 60°C for 80min, wash with water and dry to obtain antibacterial wool fiber;

[0075] S4. Modification of mugwort: Weigh 5g of mugwort powder, add 10 times of water, stir evenly, put it in a water bath, extract it with water at 95°C for 2h, filter it after extraction, collect the filtrate to obtain mugwort extract; add 2% v / v cellulase to the mugwort extract obtained above at 45°C, the enzyme activity of which reaches 30000U / g, perform enzymatic hydrolysis for 2h, then add 1.5% v / v neutral protease, continue enzymatic hydrolysis for 2.5h, wherein the activity of neutral protease is 36000U / g, after the enzymatic hydrolysis is completed, put it in a centrifuge and centrifuge it at 4000r / min for 20min to obtain a modified mugwort extract;

[0076] S5. Anti-moth treatment: a chitosan solution with a mass fraction of 6% (prepared with 1% lactic acid), a fucoidan solution with a mass fraction of 10% and a modified wormwood extract are uniformly mixed to obtain an anti-moth liquid, wherein the mass ratio of the chitosan solution, the fucoidan solution and the modified wormwood extract is 2:2:3; the wool fiber prepared in step S3 is added with the anti-moth liquid with a bath ratio of 1:40, the pH value is adjusted to 6, and the fiber is placed in an ultrasonic machine at 80°C for 60 minutes, and then washed and dried to obtain an antibacterial and anti-moth wool fiber;

[0077] S6. Spinning processing: The antibacterial and moth-proof wool fibers prepared in step S6 are carefully combed by a carding machine to separate and arrange the fibers, and short fibers and impurities are removed, thereby improving the uniformity and purity of the fibers; the combed wool fibers are combined into strips by a drawing frame to increase the length and strength of the fibers; preliminary spinning is carried out on a woolen frame to convert the drawn strips into thicker yarns, at which time the fibers are moderately stretched to form a preliminary yarn structure; the yarn obtained by woolen spinning is further stretched and combed by a fine spinning frame to improve the strength, uniformity and surface smoothness of the yarn, and finally a yarn with higher strength, better uniformity and smoother surface is obtained.

[0078] Comparative Example 4: In step S5, no chitosan solution was added, and the other steps were the same as those in Example 3.

[0079] Comparative Example 5: In step S5, no fucoidan solution was added, and the other steps were the same as those in Example 3.

[0080] Comparative Example 6: In step S5, the modified wormwood extract is not added, and the other steps are the same as those in Example 3.

[0081] Comparative Example 7: In step S5, the wormwood leaf is not modified and the wormwood leaf extract is directly used. The other steps are the same as those in Example 3.

[0082] Mothproofing test

[0083] With reference to GB / T29776-2013 “Determination of the insect resistance of textiles”, the insect resistance of wool yarn was tested by visual method. The evaluation method is shown in Tables 2 and 3 below, and the experimental results are shown in Table 4.

[0084] Table 2 Assessment of visible surface damage

[0085] grade Visible surface damage 1 No damage 2 Very rare damage 3 Moderate damage 4 Serious damage

[0086] Table 3 Evaluation of moth holes

[0087] grade Wormholes A No damage B Parts of the yarn or fiber are eaten away C Parts of the yarn or fiber are eaten away and have small holes D Several large holes

[0088] Table 4 Evaluation results of mothproofing grade

[0089] sample Mothproofing grade Example 3 1A Comparative Example 4 3B Comparative Example 5 2B Comparative Example 6 3B Comparative Example 7 1B

[0090] Table 4 is a comparison table of the evaluation results of the mothproofing grade of Example 3 and Comparative Examples 4-7. It can be seen from Table 4 that the mothproofing grade of Example 3 is 1A, and the mothproofing grades of Comparative Examples 4-7 are 3B, 2B, 3B, and 1B, respectively. It can be seen that both Example 3 and Comparative Examples 4-7 have mothproofing effects, among which the mothproofing effect of Example 3 is the best, which confirms that the chitosan solution, fucoidan solution and modified wormwood extract have a synergistic effect on mothproofing.

[0091] The above-mentioned embodiments only express the specific implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for those skilled in the art, without departing from the concept of the present invention, any other changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A moth-proof and antibacterial wool yarn, characterized in that: The wool yarn is obtained by spinning the wool after it has been subjected to descaling, antibacterial and moth-proofing treatments, and has antibacterial and moth-proofing properties as well as excellent dyeing effect and light transmittance.

2. A method for preparing a moth-proof and antibacterial wool yarn according to claim 1, wherein the specific preparation method of the wool yarn comprises the following steps: S1. Wool pretreatment: Take fresh wool, open it with a cotton carding machine, and then soak it in clean water for 10-15 minutes; put the wool soaked in clean water into a degreasing tank, wash the wool with a mixture of wool-specific detergent and water, repeat 2-3 times, and then dehydrate and dry it to obtain wool fibers; S2. Descaling treatment: the wool fiber prepared in step S1 is placed in the penetrant fatty alcohol polyoxyethylene ether, fully soaked for 5-10 minutes, taken out, and after adjusting the pH to 5, a potassium permanganate solution with a mass fraction of 8-10% is added according to a bath ratio of 1:20, and the wool fiber is descaled for 25-30 minutes; after descaling, the wool fiber is transferred to a sodium bisulfite solution with a mass fraction of 10%, and soaked for 15-20 minutes at a bath ratio of 1:20 for reduction treatment to neutralize the oxidizing effect of potassium permanganate; repeatedly washed with water to remove residual chemicals, dehydrated, and dried to obtain descaled wool fibers; S3. Antibacterial treatment: Take the descaled wool fiber prepared in step S2, add NaOH solution at a bath ratio of 1:40, react at 60-65 ° C for 25-30 minutes, and dry; then add a mixture of polyhexamethylene biguanide and cetylpyridinium chloride solution at a bath ratio of 1:50 and treat the wool fabric at a constant temperature of 50-60 ° C for 60-80 minutes to obtain antibacterial wool fiber; S4. Modification of mugwort: Weigh 5g of mugwort powder, add 8-10 times of water, stir evenly, put it in a water bath, extract it with water at 90-95°C for 2h, filter it after extraction, collect the filtrate to obtain mugwort extract; introduce 2% v / v 30000U / g cellulase into the mugwort extract at 45°C for 2h, then add 1.5% v / v 36000U / g neutral protease, enzymolysis for 2.5h, after enzymolysis, put it in a centrifuge and centrifuge it at 4000r / min for 15-20min to obtain a modified mugwort extract; S5. Anti-moth treatment: 6% chitosan solution, 10% fucoidan solution and modified wormwood extract were mixed evenly to obtain anti-moth liquid; the antibacterial wool fiber prepared in step S3 was added with the anti-moth liquid at a bath ratio of 1:40, the pH value was adjusted to 6, and the fiber was placed in an ultrasonic machine at 80°C for 60 minutes, and then washed and dried to obtain an antibacterial and anti-moth wool fiber; S6. Spinning processing: The antibacterial and moth-proof wool fibers prepared in step S6 are finely combed in a carding machine; the combed wool fibers are combined into strips on a drawing frame; in a spinning frame, the drawn strips are spun into thicker yarns; the coarse yarns are stretched and combed through a fine spinning frame to obtain yarns with higher strength, better uniformity and smoother surface.

3. According to the method for preparing moth-proof and antibacterial wool yarn according to claim 2, the mass ratio of the wool-specific washing liquid to water in step S1 is 1:

5.

4. A method for preparing moth-proof and antibacterial wool yarn according to claim 2, wherein after washing with a special wool washing liquid in step S1, the wool needs to be repeatedly washed with clean water and then dehydrated.

5. According to the method for preparing a moth-proof and antibacterial wool yarn according to claim 2, the mass fraction of the penetrant fatty alcohol polyoxyethylene ether in step S2 is 0.1%.

6. According to the method for preparing a moth-proof and antibacterial wool yarn according to claim 2, the temperature during the descaling treatment in step S2 is 60°C.

7. According to the method for preparing moth-proof and antibacterial wool yarn according to claim 2, the concentration of the NaOH solution in step S3 is 50 mmol / L.

8. The method for preparing moth-proof and antibacterial wool yarn according to claim 2, wherein the step: after the reaction of adding the NaOH solution in step S3 is completed, it is necessary to rinse with deionized water for 15-20 minutes.

9. According to the method for preparing a moth-proof and antibacterial wool yarn as claimed in claim 2, the mass ratio of the polyhexamethylene biguanide solution to the cetylpyridinium chloride solution in the mixed solution of the polyhexamethylene biguanide and cetylpyridinium chloride solution in step S3 is 1:1, and the mass fractions of the polyhexamethylene biguanide and cetylpyridinium chloride are both 3%.

10. According to the method for preparing a moth-proof and antibacterial wool yarn as claimed in claim 2, the mass ratio of the chitosan solution, the fucoidan solution and the modified wormwood extract in the moth-proof liquid in step S5 is 2:2:3, and the chitosan solution is prepared with 1% lactic acid, and the fucoidan solution is dissolved in 80°C water.

Images