Insect-proof and antibacterial wool yarn and preparation method thereof

Abstract

The present application belongs to the field of textile technology, and relates to a preparation method of wool yarn, in particular to a mothproof and antibacterial wool yarn and a preparation method thereof. The wool yarn is obtained by spinning the wool after scale removal treatment, antibacterial treatment and mothproof treatment, and has antibacterial property, mothproof property, excellent dyeing effect and light transmittance.

Description

Technical Field

[0001] This invention belongs to the field of textile technology and relates to a method for preparing wool yarn, specifically to a mothproof and antibacterial wool yarn and its preparation method. Background Technology

[0002] Wool yarn, as a natural textile material, is highly favored in the market due to its excellent warmth, breathability, and comfort, and is widely used in clothing and home textiles. However, there are still some shortcomings in the production and processing technology of wool yarn. For example, it is susceptible to moth damage, resulting in relatively low durability; wool yarn is also susceptible to bacterial attack, leading to fiber deterioration and odor, especially in humid and warm environments, where this lack of antibacterial properties may be exacerbated; during the dyeing process, wool fibers have a lower affinity for dyes than some synthetic fibers, making dyeing uniformity and color saturation a technical challenge; furthermore, in the hot summer, wool yarn, due to its natural crimp structure and high moisture absorption, may lack breathability, making it difficult for moisture to evaporate quickly, which may cause the skin to feel stuffy and unbreathable when worn in high temperatures. Therefore, developing a wool yarn with moth-proof and antibacterial properties is particularly important. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a mothproof and antibacterial wool yarn, which, in addition to being mothproof and antibacterial, also has excellent dyeing effect and light transmittance.

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

[0005] S1. Wool pretreatment: Take fresh wool and open it with a carding machine to remove large impurities. Soak the opened wool in clean water to remove some soluble impurities and dust. Put the wool soaked in clean water into a degreasing tank and wash it with a mixture of wool-specific detergent and water. Repeat 2-3 times to remove grease, sweat and other organic substances from the surface of the wool. Then dehydrate and dry to obtain wool fibers.

[0006] S2. Descaling treatment: Take the wool fibers prepared in step S1 and put them into the penetrant fatty alcohol polyoxyethylene ether. Soak them thoroughly for 5-10 minutes, take them out, adjust the pH to 5, and add potassium permanganate solution with a mass fraction of 8-10% at a bath ratio of 1:20 to descale the wool fibers for 25-30 minutes. After descaling, transfer the wool fibers to a sodium bisulfite solution with a mass fraction of 10% and soak them for 15-20 minutes at a bath ratio of 1:20 to carry out reduction treatment and neutralize the oxidizing effect of potassium permanganate. Repeatedly wash with water to remove residual chemicals, dehydrate, and dry to obtain descaled wool fibers.

[0007] S3. Antibacterial treatment: Take the descaled wool fibers prepared in step S2, add NaOH with a bath ratio of 1:40, react at 60-65℃ for 25-30 min, 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℃ for 60-80 min to obtain antibacterial wool fibers;

[0008] S4. Modification of Artemisia argyi: Weigh 5g of Artemisia argyi powder, add 8-10 times the amount of water, stir evenly, and place in a water bath. Extract at 90-95℃ for 2 hours. After extraction, filter and collect the filtrate to obtain Artemisia argyi extract. Add 2% v / v cellulase to the obtained Artemisia argyi extract at 45℃, with an enzyme activity of 30000U / g, and perform enzymatic hydrolysis for 2 hours. Then add 1.5% v / v neutral protease and continue enzymatic hydrolysis for 2.5 hours, with the neutral protease activity of 36000U / g. After enzymatic hydrolysis, centrifuge at 4000r / min for 15-20 minutes to obtain modified Artemisia argyi extract.

[0009] S5. Mothproofing treatment: Mix 6% chitosan solution, 10% fucoidan solution and modified Artemisia argyi extract evenly to obtain a mothproofing solution; take the antibacterial wool fiber prepared in step S3, add the mothproofing solution with a bath ratio of 1:40, adjust the pH value to 6, put it in an ultrasonic machine at 80℃ for 60 minutes, and then wash and dry it to obtain antibacterial and mothproof wool fiber;

[0010] S6. Spinning Process: The antibacterial and mothproof 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 roving is spun into a coarser yarn; the roving is stretched and combed by a fine spinning machine to obtain a yarn with higher strength, better uniformity, and a smoother surface.

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

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

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

[0014] Preferably, after washing with wool-specific detergent in step S1, the product should be rinsed repeatedly with clean water and then dehydrated.

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

[0016] Preferably, the temperature during the descaling process 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 NaOH solution in step S3 is complete, the mixture should be rinsed with deionized water for 15-20 minutes.

[0019] Preferably, in step S3, the mass ratio of polyhexamethylene biguanide solution to cetylpyridinium chloride solution in the mixture 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, the chitosan solution in the anti-moth liquid of step S5 is prepared with 1% lactic acid, and the fucoidan solution is dissolved in water at 80°C.

[0023] Preferably, the mass ratio of chitosan solution, fucoidan solution and modified Artemisia argyi extract in the insect-repellent solution in step S5 is 2:2:3.

[0024] Secondly, the present invention provides a mothproof and antibacterial wool yarn prepared by the above-mentioned method for preparing mothproof and antibacterial wool yarn.

[0025] The technological advancements achieved by this invention due to the adoption of the above technical solution are as follows:

[0026] 1. The polyhexamethylene biguanide solution and cetylpyridinium chloride solution in this invention have good antibacterial effects through synergistic action.

[0027] 2. In this invention, the use of potassium permanganate solution for descaling treatment can improve the dyeing effect of wool yarn.

[0028] 3. The use of potassium permanganate solution for descaling in this invention can improve the air permeability of wool yarn.

[0029] 4. In this invention, the chitosan solution, fucoidan solution, and modified Artemisia argyi extract work synergistically to prevent insect infestation.

[0030] 5. The wool yarn prepared in this invention has good uniformity and a smooth surface. Attached Figure Description

[0031] Figure 1 This is a comparison chart of the inhibition rates of the yarns in Example 1 and Comparative Examples 1-2 against Staphylococcus aureus and Escherichia coli. Detailed Implementation

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0033] In this invention, Artemisia argyi powder, chitosan, and fucoidan were purchased from Shaanxi Lanhe Biotechnology Co., Ltd.; wool-specific detergent was purchased from Guangzhou Jiajie Biotechnology Co., Ltd.; polyhexamethylene biguanide and cetylpyridinium chloride were purchased from Guangzhou Baiyun District Longgui Haoting Chemical Raw Material Business Department; cellulase was purchased from Hebei Liqia Biotechnology Co., Ltd.; and neutral protease was purchased from Hebei Qiaqiao Trading Co., Ltd.

[0034] Example 1

[0035] This embodiment demonstrates that the synergistic effect of polyhexamethylene biguanide solution and cetylpyridinium chloride solution has good antibacterial activity.

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

[0037] S1. Wool pretreatment: Fresh wool was purchased from Hebei Gome Industrial Group Co., Ltd. First, it was opened using a carding machine to remove large impurities from the wool. After opening, the wool was soaked in clean water for 10 minutes to remove some soluble impurities and dust. After soaking in clean water, the wool was placed in an oil removal tank and washed with a 20% wool-specific detergent. This was repeated twice, with each wash lasting 20 minutes, to remove grease, sweat, and other organic substances from the surface of the wool. After being repeatedly washed with clean water, the wool was dehydrated and dried to obtain wool fibers.

[0038] S2. Descaling Treatment: The wool fibers pretreated and cleaned in step S1 are placed in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soaked for 5 minutes. After soaking, the wool fibers are removed and the pH is adjusted to 5. At 60°C, the wool fibers are placed in an 8% potassium permanganate solution at a 1:20 bath ratio for descaling treatment for 25 minutes. After descaling, the wool fibers are transferred to a 10% sodium bisulfite solution and soaked for 15 minutes at a 1:20 bath ratio for reduction treatment to neutralize the oxidizing effect of potassium permanganate. The wool fibers are then thoroughly rinsed with water to remove residual chemicals, followed by dehydration and drying in a vacuum oven at 85°C until the wool fibers reach a constant weight. This process aims to scientifically and rationally remove the scales from the surface of the wool fibers while maintaining the integrity and performance of the fibers.

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

[0040] S4. Modification of Artemisia argyi: Weigh 5g of Artemisia argyi powder, add 8 times the amount of water, stir evenly, and place in a water bath. Extract at 95℃ for 2 hours. After extraction, filter and collect the filtrate to obtain Artemisia argyi extract. Add 2% v / v cellulase to the obtained Artemisia argyi extract at 45℃, with an enzyme activity of 30000U / g, and perform enzymatic hydrolysis for 2 hours. Then add 1.5% v / v neutral protease and continue enzymatic hydrolysis for 2.5 hours, with the neutral protease activity of 36000U / g. After enzymatic hydrolysis, centrifuge at 4000r / min for 15 minutes to obtain modified Artemisia argyi extract.

[0041] S5. Mothproofing treatment: A mothproofing solution is obtained by mixing a 6% chitosan solution (prepared with 1% lactic acid), a 10% fucoidan solution, and a modified Artemisia argyi extract. The mass ratio of the chitosan solution, fucoidan solution, and modified Artemisia argyi extract is 2:2:3. The wool fibers prepared in step S3 are taken, and the mothproofing solution with a bath ratio of 1:40 is added. The pH value is adjusted to 6, and the fibers are placed in an ultrasonic machine at 80°C for 60 minutes. After that, the fibers are washed and dried to obtain antibacterial and mothproof wool fibers.

[0042] S6. Spinning Process: The antibacterial and mothproof wool fibers prepared in step S6 are finely combed through a carding machine to separate and arrange the fibers, while removing short fibers and impurities, thereby improving the uniformity and purity of the fibers. The combed wool fibers are then passed through a drawing frame to form slivers, thereby increasing the length and strength of the fibers. Preliminary spinning is performed on a roving machine to convert the drawing frame into a coarser yarn. At this time, the fibers are moderately stretched to form a preliminary yarn structure. The roving yarn is further stretched and combed through a fine spinning machine to improve the strength, uniformity, and surface smoothness of the yarn, ultimately obtaining a yarn with higher strength, better uniformity, and a smoother surface.

[0043] Comparative Example 1: In step S3, polyhexamethylene biguanide solution was not added, and all other steps were the same as in Example 1.

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

[0045] Antibacterial test

[0046] Referring to GB / T20944.3—2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Shaking Method", a TS-200B constant temperature incubator shaker (purchased from Changzhou Jintan Liangyou Instrument Co., Ltd.) was used to test the antibacterial rate of the yarn. Staphylococcus aureus and Escherichia coli were selected for experimental determination; the product number of Staphylococcus aureus was 33025, and the product number of Escherichia coli was 30051, both purchased from Beijing Sanyao Technology Co., Ltd. The antibacterial performance test had three levels: Level A (10 washes), Level AA (20 washes), and Level AAA (50 washes). This experiment was conducted according to the Level AAA requirements. The experimental results are as follows: Figure 1 As shown.

[0047] Figure 1 This is a comparison chart of the inhibition rates of the yarns from Example 1 and Comparative Examples 1-2 against Staphylococcus aureus and Escherichia coli. As shown in the chart, Example 1 is significantly superior to Comparative Examples 1-2 in inhibiting Staphylococcus aureus and Escherichia coli, with the inhibition rate of Example 1 against both Staphylococcus aureus and Escherichia coli exceeding 95%, demonstrating excellent antibacterial effects. This confirms the good antibacterial activity resulting from the synergistic effect of polyhexamethylene biguanide solution and cetylpyridinium chloride solution.

[0048] Example 2

[0049] This embodiment demonstrates that descaling treatment can improve the dyeing effect and breathability of wool yarn.

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

[0051] S1. Wool pretreatment: Fresh wool was purchased from Hebei Gome Industrial Group Co., Ltd. First, it was opened using a carding machine to remove large impurities from the wool. After opening, the wool was soaked in clean water for 13 minutes to remove some soluble impurities and dust. After soaking in clean water, the wool was placed in an oil removal tank and washed with a 20% wool-specific detergent solution. This was repeated 3 times, with each wash lasting 25 minutes, to remove grease, sweat, and other organic substances from the surface of the wool. After being repeatedly washed with clean water, the wool was dehydrated and dried to obtain wool fibers.

[0052] S2. Descaling Treatment: The wool fibers pretreated and cleaned in step S1 are placed in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soaked for 8 minutes. After soaking, the wool fibers are removed and the pH is adjusted to 5. At 60°C, the wool fibers are placed in a 9% potassium permanganate solution at a 1:20 bath ratio for descaling treatment for 28 minutes. After descaling, the wool fibers are transferred to a 10% sodium bisulfite solution and soaked for 18 minutes at the same 1:20 bath ratio for reduction treatment to neutralize the oxidizing effect of potassium permanganate. The wool fibers are then thoroughly rinsed with water to remove residual chemicals, followed by dehydration and drying in a vacuum oven at 85°C until the wool fibers reach a constant weight. This process aims to scientifically and rationally remove the scales from the surface of the wool fibers while maintaining the integrity and performance of the fibers.

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

[0054] S4. Modification of Artemisia argyi: Weigh 5g of Artemisia argyi powder, add 10 times the amount of water, stir evenly, and place in a water bath. Extract at 90℃ for 2 hours. After extraction, filter and collect the filtrate to obtain Artemisia argyi extract. Add 2% v / v cellulase to the obtained Artemisia argyi extract at 45℃, with an enzyme activity of 30000U / g, and perform enzymatic hydrolysis for 2 hours. Then add 1.5% v / v neutral protease and continue enzymatic hydrolysis for 2.5 hours, with the neutral protease activity of 36000U / g. After enzymatic hydrolysis, centrifuge at 4000r / min for 15 minutes to obtain modified Artemisia argyi extract.

[0055] S5. Mothproofing treatment: A mothproofing solution is obtained by mixing a 6% chitosan solution (prepared with 1% lactic acid), a 10% fucoidan solution, and a modified Artemisia argyi extract. The mass ratio of the chitosan solution, fucoidan solution, and modified Artemisia argyi extract is 2:2:3. The wool fibers prepared in step S3 are taken, and the mothproofing solution with a bath ratio of 1:40 is added. The pH value is adjusted to 6, and the fibers are placed in an ultrasonic machine at 80°C for 60 minutes. After that, the fibers are washed and dried to obtain antibacterial and mothproof wool fibers.

[0056] S6. Spinning Process: The antibacterial and mothproof wool fibers prepared in step S6 are finely combed through a carding machine to separate and arrange the fibers, while removing short fibers and impurities, thereby improving the uniformity and purity of the fibers. The combed wool fibers are then passed through a drawing frame to form slivers, thereby increasing the length and strength of the fibers. Preliminary spinning is performed on a roving machine to convert the drawing frame into a coarser yarn. At this time, the fibers are moderately stretched to form a preliminary yarn structure. The roving yarn is further stretched and combed through a fine spinning machine to improve the strength, uniformity, and surface smoothness of the yarn, ultimately obtaining a yarn with higher strength, better uniformity, and a smoother surface.

[0057] Comparative Example 3: No descaling treatment was performed, step S2 was omitted, and all other steps were the same as in Example 2.

[0058] Dyeing effect and air permeability test:

[0059] (1) Staining effect test

[0060] One part of wool yarn was added to 50 parts of a 2% (by yarn weight) weakly acidic Prass Red B dye solution, and dyeing was carried out in an environment of pH 4.5. The dyeing process started at 50℃ and gradually increased to 90℃. The K / S value of the wool yarn sample was measured using a visible spectrophotometer to evaluate the dyeing effect. The experimental results are shown in Table 1.

[0061] (2) Breathability test

[0062] Referring to GB / T5453—1997 "Determination of air permeability of textile fabrics", the gas flow rate passing vertically through a given sample area within a certain time was measured using an air permeability tester. The experimental results are shown in Table 1.

[0063] Table 1. Results of K / S value and air permeability measurement of wool yarn

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

[0065] The K / S value, or color depth value, is an indicator of the depth of color on the surface of dyed fabrics. It directly affects the intensity and uniformity of the dyeing effect of wool yarn. The higher the K / S value, the deeper and richer the color, and the better the dyeing effect. Air permeability is an important indicator of the breathability of wool yarn, reflecting the yarn's ability to allow air to pass through. The higher the air permeability, the better the breathability of the wool yarn, and the more comfortable and ventilated it provides when worn.

[0066] Table 1 compares the K / S value and air permeability of wool yarns in Example 2 and Comparative Example 3. As shown in Table 1, the K / S value of Example 2 is 29.67, while 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 was 379.38 L / (m2·s), while that of Comparative Example 3 group was 355.45 L / (m2·s). The air permeability of Example 2 group was significantly higher than that of Comparative Example 3 group, indicating that Example 2 group had the best air permeability.

[0068] In summary, the yarns in Example 2 showed the best dyeing effect and breathability, confirming that descaling treatment can improve the dyeing effect and breathability of yarns.

[0069] Example 3

[0070] This embodiment demonstrates that the chitosan solution, fucoidan solution, and modified Artemisia argyi extract work synergistically to prevent moth infestation.

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

[0072] S1. Wool pretreatment: Fresh wool was purchased from Hebei Gome Industrial Group Co., Ltd. First, it was opened using a carding machine to remove large impurities from the wool. After opening, the wool was soaked in clean water for 15 minutes to remove some soluble impurities and dust. After soaking in clean water, the wool was placed in an oil removal tank and washed with a 20% wool-specific detergent solution. This was repeated 3 times, with each wash lasting 30 minutes, to remove grease, sweat, and other organic substances from the surface of the wool. After being repeatedly washed with clean water, the wool was dehydrated and dried to obtain wool fibers.

[0073] S2. Descaling Treatment: The wool fibers pretreated and cleaned in step S1 are placed in a 0.1% fatty alcohol polyoxyethylene ether penetrant and soaked for 10 minutes. After soaking, the wool fibers are removed and the pH is adjusted to 5. At 60°C, the wool fibers are placed in a 10% potassium permanganate solution at a 1:20 bath ratio for descaling treatment for 30 minutes. After descaling, the wool fibers are transferred to a 10% sodium bisulfite solution and soaked for 20 minutes at the same 1:20 bath ratio for reduction treatment to neutralize the oxidizing effect of potassium permanganate. The wool fibers are then thoroughly rinsed with water to remove residual chemicals, followed by dehydration and drying in a vacuum oven at 85°C until the wool fibers reach a constant weight. This process aims to scientifically and rationally remove the scales from the surface of the wool fibers while maintaining the integrity and performance of the fibers.

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

[0075] S4. Modification of Artemisia argyi: Weigh 5g of Artemisia argyi powder, add 10 times the amount of water, stir evenly, and place in a water bath. Extract at 95℃ for 2 hours. After extraction, filter and collect the filtrate to obtain Artemisia argyi extract. Add 2% v / v cellulase to the obtained Artemisia argyi extract at 45℃, with an enzyme activity of 30000U / g, and perform enzymatic hydrolysis for 2 hours. Then add 1.5% v / v neutral protease and continue enzymatic hydrolysis for 2.5 hours, with the neutral protease activity of 36000U / g. After enzymatic hydrolysis, centrifuge at 4000r / min for 20 minutes to obtain modified Artemisia argyi extract.

[0076] S5. Mothproofing treatment: A mothproofing solution is obtained by mixing a 6% chitosan solution (prepared with 1% lactic acid), a 10% fucoidan solution, and a modified Artemisia argyi extract. The mass ratio of the chitosan solution, fucoidan solution, and modified Artemisia argyi extract is 2:2:3. The wool fibers prepared in step S3 are taken, and the mothproofing solution with a bath ratio of 1:40 is added. The pH value is adjusted to 6, and the fibers are placed in an ultrasonic machine at 80°C for 60 minutes. After that, the fibers are washed and dried to obtain antibacterial and mothproof wool fibers.

[0077] S6. Spinning Process: The antibacterial and mothproof wool fibers prepared in step S6 are finely combed through a carding machine to separate and arrange the fibers, while removing short fibers and impurities, thereby improving the uniformity and purity of the fibers. The combed wool fibers are then passed through a drawing frame to form slivers, thereby increasing the length and strength of the fibers. Preliminary spinning is performed on a roving machine to convert the drawing frame into a coarser yarn. At this time, the fibers are moderately stretched to form a preliminary yarn structure. The roving yarn is further stretched and combed through a fine spinning machine to improve the strength, uniformity, and surface smoothness of the yarn, ultimately obtaining a yarn with higher strength, better uniformity, and a smoother surface.

[0078] Comparative Example 4: Chitosan solution was not added in step S5, and all other steps were the same as in Example 3.

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

[0080] Comparative Example 6: No modified Artemisia argyi extract was added in step S5, and all other steps were the same as in Example 3.

[0081] Comparative Example 7: In step S5, no modification was performed on the mugwort leaves; the mugwort extract was used directly. All other steps were the same as in Example 3.

[0082] Mothproof test

[0083] The insect-proof properties of wool yarn were tested by visual inspection in accordance with GB / T29776—2013 "Determination of Insect-proof Performance of Textiles". The evaluation methods are 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 observed 2 Very rare damage 3 Moderate damage 4 Serious damage

[0086] Table 3 Assessment of wormholes

[0087] grade Worm holes A No damage observed B Parts of the yarn or fiber were corroded by moths C Parts of the yarn or fiber are corroded by moths, leaving small holes. D Several large holes from wormholes

[0088] Table 4. Evaluation Results of Mothproofing Level

[0089] sample Mothproof rating Example 3 1A Comparative Example 4 3B Comparative Example 5 2B Comparative Example 6 3B Comparative Example 7 1B

[0090] Table 4 compares the moth-proofing ratings of Example 3 and Comparative Examples 4-7. Table 4 shows that Example 3 achieved a moth-proofing rating of 1A, while Comparative Examples 4-7 achieved ratings of 3B, 2B, 3B, and 1B, respectively. This indicates that both Example 3 and Comparative Examples 4-7 have moth-proofing effects, with Example 3 showing the best effect. This confirms that the synergistic effect of chitosan solution, fucoidan solution, and modified Artemisia argyi extract provides moth-proofing protection.

[0091] The above-described embodiments are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that for those skilled in the art, any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the scope of protection of the present invention.

Claims

1. A mothproof and antibacterial wool yarn, characterized in that: The wool yarn is produced by spinning wool after descaling, antibacterial treatment, and mothproofing treatment. It possesses antibacterial and mothproof properties, as well as excellent dyeing effects and light transmittance. The specific preparation method of the wool yarn includes the following steps: S1. Wool pretreatment: Take fresh wool, open it with a carding machine and soak it in clean water for 10-15 minutes; put the wool soaked in clean water into an oil removal 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: Take the wool fibers prepared in step S1 and put them into the penetrant fatty alcohol polyoxyethylene ether. Soak them for 5-10 minutes. Take them out, adjust the pH to 5, and add potassium permanganate solution with a mass fraction of 8-10% at a bath ratio of 1:

20. Descaling treatment is performed on the wool fibers for 25-30 minutes. After descaling, transfer the wool fibers to a sodium bisulfite solution with a mass fraction of 10% and soak them for 15-20 minutes at a bath ratio of 1:20 to perform reduction treatment and neutralize the oxidizing effect of potassium permanganate. Repeatedly wash with water to remove residual chemicals, dehydrate, and dry to obtain descaled wool fibers. S3. Antibacterial treatment: Take the descaled wool fibers prepared in step S2, add NaOH solution at a bath ratio of 1:40, react at 60-65℃ for 25-30 min, and dry; then add a mixture of polyhexamethylene biguanide and cetylpyridinium chloride solution at a bath ratio of 1:50 and treat the wool fibers at a constant temperature of 50-60℃ for 60-80 min to obtain antibacterial wool fibers; S4. Modification of Artemisia argyi: Weigh 5g of Artemisia argyi powder, add 8-10 times the amount of water, stir evenly, place in a water bath, and extract at 90-95℃ for 2 hours. After extraction, filter and collect the filtrate to obtain Artemisia argyi extract. At 45℃, introduce 2% v / v of 30000U / g cellulase into the Artemisia argyi extract for 2 hours, then add 1.5% v / v of 36000U / g neutral protease and hydrolyze for 2.5 hours. After hydrolysis, centrifuge at 4000r / min for 15-20 minutes to obtain modified Artemisia argyi extract. S5. Mothproofing treatment: Mix 6% chitosan solution, 10% fucoidan solution and modified Artemisia argyi extract evenly to obtain mothproofing solution; take the antibacterial wool fiber prepared in step S3, add the mothproofing solution with a bath ratio of 1:40, adjust the pH value to 6, put it in an ultrasonic machine at 80℃ for 60 minutes, and then wash and dry it to obtain antibacterial and mothproof wool fiber; S6. Spinning process: The antibacterial and mothproof wool fibers prepared in step S5 are finely combed in a carding machine; the combed wool fibers are combined into strips on a drawing frame; in a roving machine, the roving is spun into a coarser yarn; the roving is stretched and combed by a fine spinning machine to obtain a yarn with higher strength, better uniformity and smoother surface.

2. The method for preparing a mothproof and antibacterial wool yarn according to claim 1, wherein the mass ratio of wool-specific washing liquid to water in step S1 is 1:

5.

3. In the method for preparing a mothproof and antibacterial wool yarn according to claim 1, after washing with wool-specific detergent in step S1, the yarn needs to be repeatedly rinsed with clean water and then dehydrated.

4. In the method for preparing a mothproof and antibacterial wool yarn according to claim 1, the mass fraction of the impregnating agent fatty alcohol polyoxyethylene ether in step S2 is 0.1%.

5. The method for preparing a mothproof and antibacterial wool yarn according to claim 1, wherein the temperature during the descaling process in step S2 is 60°C.

6. The method for preparing a mothproof and antibacterial wool yarn according to claim 1, wherein the concentration of the NaOH solution in step S3 is 50 mmol / L.

7. In the method for preparing a mothproof and antibacterial wool yarn according to claim 1, in step S3, the mass ratio of polyhexamethylene biguanide solution to cetylpyridinium chloride solution in the mixture is 1:1, and the mass fraction of both polyhexamethylene biguanide solution and cetylpyridinium chloride solution is 3%.

8. The method for preparing a mothproof and antibacterial wool yarn according to claim 1, wherein the mass ratio of chitosan solution, fucoidan solution and modified Artemisia argyi extract in the mothproof 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 water at 80°C.

Images