Wear-resistant antibacterial flax blended yarn and preparation process thereof

Abstract

The invention relates to the technical field of textiles, in particular to a wear-resistant antibacterial flax blended yarn and a preparation process thereof. The method specifically comprises the following steps: S1, after performing ultraviolet irradiation on cotton fibers, putting the cotton fibers into a wear-resistant antibacterial solution, and performing dipping and drying to obtain wear-resistant fibers; s2: (1) modifying chitosan by using 6-maleimidohexanoic acid, so as to obtain modified chitosan; (2) sequentially reacting polyethylene glycol adipate with isophorone diisocyanate, modified chitosan and sodium 2-mercaptoethanesulfonate, and finally emulsifying to obtain a fiber treating agent; s3, (1) performing opening mixing, cotton carding, drawing, roving, spinning and spooling on the linen fibers and the wear-resistant fibers in sequence to obtain a linen blended yarn crude product; and (2) soaking the flax blended yarn crude product into the fiber treating agent, padding and drying to obtain the wear-resistant antibacterial flax blended yarn.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a wear-resistant and antibacterial flax blended yarn and a preparation process thereof. Background Art

[0002] Flax fiber has the characteristics of strong moisture absorption, fast heat dissipation, good air permeability, good antistatic property and excellent antibacterial performance. It is called "the queen of natural fibers" and is widely used in summer clothing fabrics. However, pure linen fabrics have defects such as poor wrinkle resistance and poor elasticity. The most fatal defect is that it is not comfortable in contact with the skin and can easily cause itching on the skin. This undoubtedly restricts the further development of linen in the textile industry. In order to improve the status of linen in the textile industry, people began to blend it with cotton, animal hair, polyester, etc., while maintaining the advantages of linen fabrics, improving the related defects of linen fabrics to improve the practicality of linen fabrics.

[0003] Based on this, the present invention will provide a preparation process of wear-resistant and antibacterial flax blended yarn, which is dimensionally stable, fluffy and soft, and has excellent spinning, weaving and dyeing properties. Summary of the invention

[0004] The object of the present invention is to provide a wear-resistant and antibacterial flax blended yarn and a preparation process thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A preparation process of a wear-resistant and antibacterial flax blended yarn comprises the following steps:

[0007] S1: After irradiating the cotton fiber with ultraviolet light, the cotton fiber is placed in a wear-resistant and antibacterial liquid, and then immersed and dried to obtain a wear-resistant fiber;

[0008] S2: (1) chitosan is modified with 6-maleimidocaproic acid to obtain modified chitosan; (2) polyethylene adipate is sequentially reacted with isophorone diisocyanate, modified chitosan, and sodium 2-mercaptoethane sulfonate, and finally emulsified to obtain a fiber treatment agent;

[0009] S3: (1) opening and mixing flax fiber and wear-resistant fiber, carding, drawing, roving, spinning and winding in sequence to obtain crude flax blended yarn; (2) soaking the crude flax blended yarn in a fiber treatment agent, and obtaining wear-resistant and antibacterial flax blended yarn through impregnation and rolling and drying.

[0010] Furthermore, the preparation method of the wear-resistant fiber is as follows: (1) immersing the wool fiber in acetone for 2 to 4 hours, taking it out, washing it, and drying it at room temperature to obtain pretreated wool fiber A; (2) using 280 to 315 nm ultraviolet light to uniformly irradiate the pretreated cotton fiber for 30 to 90 minutes to obtain pretreated wool fiber B; (3) opening and mixing the pretreated wool fiber B and acrylic fiber to obtain mixed fiber; (4) adding mesoporous silica to a silver nitrate solution, placing it at 40 to 60° C. for 4 to 8 hours, and then filtering, washing, and drying to obtain wear-resistant antibacterial particles; (5) adding wear-resistant antibacterial particles and silane coupling agent to deionized water, stirring it at 70 to 80° C. for 30 to 60 minutes to obtain a wear-resistant antibacterial liquid; (6) placing the mixed fiber in the wear-resistant antibacterial liquid, immersing it for 10 to 20 minutes, and drying it to obtain a wear-resistant fiber.

[0011] Furthermore, the mass ratio of the pretreated wool fiber B to the acrylic fiber is 1:(1-2).

[0012] Furthermore, the mass ratio of the mesoporous silica to silver nitrate is 50:1; wherein the particle size of the mesoporous silica is 50-100 nm, and the pore size is 5-10 nm.

[0013] Furthermore, the mass ratio of the wear-resistant and antibacterial particles to the mixed fibers is (1-5):25.

[0014] Furthermore, the silane coupling agent includes but is not limited to any one of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and γ-(β-aminoethyl)aminopropyltrimethoxysilane.

[0015] Furthermore, the amount of the silane coupling agent added is 3-5% of the mass of the wear-resistant and antibacterial particles.

[0016] In the scheme, since wool fiber has the characteristics of skin-friendly and wrinkle-resistant, the present invention is designed to blend wool fiber with flax fiber, which can neutralize and improve the irritation of flax fiber to the skin and the shortcomings of easy wrinkling. However, considering that the wear resistance of cotton fiber is relatively lacking, acrylic fiber and wool fiber are mixed in the scheme to enhance its wear resistance. In addition, considering that wool fiber is prone to mildew if it is in a humid environment for a long time, a wear-resistant antibacterial liquid is prepared in the scheme to improve it, so as to enhance its antibacterial property, and to a certain extent, its wear resistance can also be enhanced. Before being impregnated with the wear-resistant antibacterial liquid, the wool fiber is first subjected to ultraviolet irradiation treatment: on the one hand, after ultraviolet irradiation treatment, the disulfide bonds on the surface of the wool fiber scales can be destroyed, thereby enhancing the dyeing performance of the wool fiber; on the other hand, after ultraviolet irradiation treatment, polar groups such as -OH and -NH2 can be introduced on the surface of the wool fiber, which is helpful for subsequent combination with mesoporous silica, thereby effectively enhancing the wear resistance and antibacterial property of the fiber.

[0017] Furthermore, the preparation method of the fiber treatment agent is as follows: (1) chitosan is added to a 2-5 v / v % acetic acid aqueous solution, and stirred and dissolved at 40-50° C. to obtain a chitosan solution; 6-maleimidocaproic acid is added to dimethylformamide, and stirred and dissolved at 40-50° C. to obtain a 6-maleimidocaproic acid solution; (2) the chitosan solution and the 6-maleimidocaproic acid solution are mixed, and a condensation agent and an acylation catalyst are added thereto, and the reaction is carried out at 40-50° C. for 6-24 hours, and then the reaction is terminated, and a base is added to adjust the solution to neutrality, and the modified chitosan is obtained after separation. (3) under the protection of inert gas, polyethylene adipate is stirred and heated to 60-80°C, isophorone diisocyanate and dibutyltin dilaurate are added and reacted for 1-2 hours to obtain product A; (4) modified chitosan is added to product A and the reaction is continued for 1-3 hours to obtain product B; (5) the temperature of product B is reduced to 30-40°C, sodium 2-mercaptoethane sulfonate and a photoinitiator are added, and after stirring and dispersing, 365 nm ultraviolet light is used to irradiate the reaction for 30-60 minutes to terminate the reaction, and finally deionized water is added, and the mixture is stirred and emulsified for 10-30 minutes to obtain a fiber treatment agent.

[0018] Furthermore, the raw materials of the modified chitosan include the following components: by weight, 6-10 parts of chitosan, 3-5 parts of 6-maleimidocaproic acid, 0.12-0.3 parts of condensing agent, 0.06-0.3 parts of acylation catalyst, 50 parts of acetic acid aqueous solution, and 40 parts of dimethylformamide.

[0019] Furthermore, the condensing agent includes but is not limited to any one of dicyclohexylcarbodiimide, diisopropylcarbodiimide and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide.

[0020] Furthermore, the acylation catalyst includes but is not limited to any one of 4-N,N-dimethylpyridine and 1-hydroxybenzotriazole.

[0021] Furthermore, the raw materials of the fiber treatment agent include the following components: by weight, 10 parts of polyethylene adipate, 10-20 parts of isophorone diisocyanate, 0.1-0.5 parts of dibutyltin dilaurate, 5-10 parts of modified chitosan, 2-5 parts of sodium 2-mercaptoethane sulfonate, 0.1-0.5 parts of photoinitiator, and 10-20 parts of deionized water.

[0022] Furthermore, the dipping and rolling is carried out in a double dipping and double rolling manner, wherein the first dipping is carried out at room temperature for 30 to 60 minutes, and the rolling rate is 90±5%; and the second dipping is carried out at room temperature for 5 to 10 minutes, and the rolling rate is 90±5%.

[0023] In the scheme, 6-maleimidocaproic acid is grafted onto chitosan through an amidation reaction, and the modification of chitosan is completed, so that the water-insoluble chitosan is embedded in the water-based polyurethane, and finally, sodium 2-mercaptoethane sulfonate is grafted onto the water-based polyurethane through a click reaction to prepare a fiber treatment agent. The principle is that chitosan has certain antibacterial properties, but it is insoluble in water and it is difficult to modify the fiber directly. Therefore, in the scheme, it is first modified and then embedded into the water-based polyurethane (polyurethane can be used as a finishing agent for fiber fabrics and synthetic fabrics, which can adjust and improve the feel, wrinkle resistance and pilling resistance of the fabric, and the water absorption of the fabric will also be improved, making the fabric more comfortable to wear), thereby making the water-based polyurethane have good antibacterial properties; at the same time, considering that linen fabrics are less comfortable to wear than other fiber fabrics, in order to further improve the quality and added value of linen fabrics, it is more in line with the current trend of high-end and comfortable clothing. In the present invention, sodium 2-mercaptoethane sulfonate is further grafted onto the fiber treatment agent through a click reaction, and sulfonate is introduced through sodium 2-mercaptoethane sulfonate, and sulfonate can further improve the flexibility of the fiber, and at the same time can enhance the water absorption and thermal stability of the fiber, making it easier to process. Finally, the fiber fabric has excellent antibacterial properties, and the fabric is soft and not easy to wrinkle or pill (better wear resistance).

[0024] Furthermore, the wear-resistant and antibacterial flax blended yarn comprises the following components: 20 to 70 parts by weight of flax fiber and 10 to 50 parts of wear-resistant fiber.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] (1) The present invention prepares a flax blended yarn with excellent wear-resistant and antibacterial properties by blending wear-resistant fiber and flax fiber together and finally padding the yarn with a fiber treatment liquid;

[0027] (2) The fabric produced by the flax blended yarn prepared by the present invention has better wrinkle resistance and moisture absorption performance than the fabric produced by traditional flax yarn;

[0028] (3) The fabric produced from the flax blended yarn prepared by the present invention is skin-friendly, has no irritating effect on the skin, and is comfortable to wear.

[0029] In summary, the fabric produced by the flax blended yarn prepared by the present invention is soft, not easy to wrinkle and pill, and comfortable to wear, which greatly improves the quality and added value of the linen fabric and is more in line with the current trend of high-end and comfortable clothing. DETAILED DESCRIPTION

[0030] The following is a preferred implementation of the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. For ordinary technicians in this technical field, all other embodiments obtained by ordinary technicians in this field without creative work without departing from the principle of the embodiment of the present invention are within the scope of protection of the present invention.

[0031] Example 1: A preparation process of a wear-resistant and antibacterial flax blended yarn:

[0032] S1: Preparation of wear-resistant fiber: (1) 40 parts of wool fiber were immersed in 100 parts of acetone for 3 hours, then taken out, washed, and dried at room temperature to obtain pretreated wool fiber A; (2) 280 nm ultraviolet light was used to uniformly irradiate the pretreated cotton fiber for 60 minutes to obtain pretreated wool fiber B; (3) 35 parts of pretreated wool fiber B and 50 parts of acrylic fiber were opened and mixed to obtain mixed fiber; (4) 10 parts of mesoporous dioxide were added to the pretreated cotton fiber. Silicon is added to 20 parts of a 1 wt% silver nitrate aqueous solution, placed at 50°C for 6 hours, filtered, washed, and dried to obtain wear-resistant antibacterial particles; (5) 8 parts of the wear-resistant antibacterial particles and 0.3 parts of γ-aminopropyltrimethoxysilane are added to 100 parts of deionized water, stirred at 75°C for 30 minutes to obtain a wear-resistant antibacterial liquid; (6) 50 parts of the mixed fiber are placed in the wear-resistant antibacterial liquid, immersed for 15 minutes, and then dried to obtain a wear-resistant fiber;

[0033] S2: Preparation of fiber treatment agent: (1) Add 16 parts of chitosan to 100 parts of 4 v / v% acetic acid aqueous solution, stir and dissolve at 45°C to obtain chitosan solution; add 8 parts of 6-maleimidocaproic acid to 80 parts of dimethylformamide, stir and dissolve at 45°C to obtain 6-maleimidocaproic acid solution; (2) Mix the chitosan solution and the 6-maleimidocaproic acid solution, add 0.4 parts of dicyclohexylcarbodiimide and 0.3 parts of 4-N,N-dimethylpyridine, react at 45°C for 12 hours, terminate the reaction, add sodium hydroxide solution to adjust the solution to neutrality, separate, To obtain modified chitosan; (3) Under nitrogen protection, 20 parts of polyethylene adipate were stirred and heated to 70°C, 30 parts of isophorone diisocyanate and 0.6 parts of dibutyltin dilaurate were added and reacted for 2 hours to obtain product A; (4) 16 parts of modified chitosan were added to product A and the reaction was continued for 2 hours to obtain product B; (5) The temperature of product B was lowered to 30°C, 7 parts of sodium 2-mercaptoethane sulfonate and 0.6 parts of photoinitiator were added, and after stirring and dispersing, 365 nm ultraviolet light was used to irradiate the reaction for 45 minutes to terminate the reaction, and finally 40 parts of deionized water were added, and the mixture was stirred and emulsified for 20 minutes to obtain a fiber treatment agent;

[0034] S3: (1) 60 parts of flax fiber and 30 parts of wear-resistant fiber are opened and mixed, carded, drawn, roving, spinning and winding in sequence to obtain a crude flax blended yarn; (2) The crude flax blended yarn is immersed in a fiber treating agent, and is subjected to immersion and rolling (one immersion at room temperature for 30 minutes, with a rolling rate of 90%; and a second immersion at room temperature for 5 minutes, with a rolling rate of 90%) and drying to obtain a wear-resistant and antibacterial flax blended yarn.

[0035] Example 2: A preparation process of a wear-resistant and antibacterial flax blended yarn:

[0036] S1: Preparation of wear-resistant fiber: (1) 40 parts of wool fiber were immersed in 100 parts of acetone for 3 hours, then taken out, washed, and dried at room temperature to obtain pretreated wool fiber A; (2) 280 nm ultraviolet light was used to uniformly irradiate the pretreated cotton fiber for 60 minutes to obtain pretreated wool fiber B; (3) 35 parts of pretreated wool fiber B and 35 parts of acrylic fiber were opened and mixed to obtain mixed fiber; (4) 10 parts of mesoporous silica were added. Add to 20 parts of 1wt% silver nitrate aqueous solution, place at 50°C for 6 hours, filter, wash and dry to obtain wear-resistant antibacterial particles; (5) Add 6 parts of wear-resistant antibacterial particles and 0.18 parts of γ-aminopropyltrimethoxysilane to 100 parts of deionized water, stir at 75°C for 30 minutes to obtain wear-resistant antibacterial liquid; (6) Put 50 parts of mixed fiber into the wear-resistant antibacterial liquid, immerse for 10 minutes, and dry to obtain wear-resistant fiber;

[0037] S2: Preparation of fiber treatment agent: (1) 16 parts of chitosan are added to 100 parts of 4 v / v% acetic acid aqueous solution, stirred and dissolved at 45°C to obtain a chitosan solution; 6 parts of 6-maleimidocaproic acid are added to 80 parts of dimethylformamide, stirred and dissolved at 45°C to obtain a 6-maleimidocaproic acid solution; (2) the chitosan solution and the 6-maleimidocaproic acid solution are mixed, and 0.24 parts of dicyclohexylcarbodiimide and 0.12 parts of 4-N,N-dimethylpyridine are added thereto, and the reaction is carried out at 45°C for 12 hours, and the reaction is terminated, and sodium hydroxide solution is added to adjust the solution to neutrality, and separated. , to obtain modified chitosan; (3) under nitrogen protection, stir and heat 20 parts of polyethylene adipate to 70°C, add 30 parts of isophorone diisocyanate and 0.6 parts of dibutyltin dilaurate to react for 2 hours to obtain product A; (4) add 10 parts of modified chitosan to product A, continue to react for 2 hours, and obtain product B; (5) reduce the temperature of product B to 30°C, add 4 parts of sodium 2-mercaptoethane sulfonate and 0.2 parts of photoinitiator, stir and disperse, use 365nm ultraviolet light to react for 45 minutes, terminate the reaction, and finally add 40 parts of deionized water, stir and emulsify for 20 minutes to obtain a fiber treatment agent;

[0038] S3: (1) 60 parts of flax fiber and 30 parts of wear-resistant fiber are opened and mixed, carded, drawn, roving, spinning and winding in sequence to obtain a crude flax blended yarn; (2) The crude flax blended yarn is immersed in a fiber treating agent, and is subjected to immersion and rolling (one immersion at room temperature for 30 minutes, with a rolling rate of 90%; and a second immersion at room temperature for 5 minutes, with a rolling rate of 90%) and drying to obtain a wear-resistant and antibacterial flax blended yarn.

[0039] Example 3: Preparation process of a wear-resistant and antibacterial flax blended yarn:

[0040] S1: Preparation of wear-resistant fiber: (1) 40 parts of wool fiber are immersed in 100 parts of acetone for 3 hours, then taken out, washed, and dried at room temperature to obtain pretreated wool fiber A; (2) 280 nm ultraviolet light is used to uniformly irradiate the pretreated cotton fiber for 60 minutes to obtain pretreated wool fiber B; (3) 35 parts of pretreated wool fiber B and 70 parts of acrylic fiber are opened and mixed to obtain mixed fiber; (4) 10 parts of mesoporous silica are added. Add to 20 parts of 1wt% silver nitrate aqueous solution, place at 50°C for 6 hours, filter, wash and dry to obtain wear-resistant antibacterial particles; (5) Add 10 parts of wear-resistant antibacterial particles and 0.5 parts of γ-aminopropyltrimethoxysilane to 100 parts of deionized water, stir at 75°C for 30 minutes to obtain wear-resistant antibacterial liquid; (6) Put 50 parts of mixed fiber into the wear-resistant antibacterial liquid, immerse for 20 minutes, and dry to obtain wear-resistant fiber;

[0041] S2: Preparation of fiber treatment agent: (1) Add 16 parts of chitosan to 100 parts of 4 v / v% acetic acid aqueous solution, stir and dissolve at 45°C to obtain chitosan solution; add 10 parts of 6-maleimidocaproic acid to 80 parts of dimethylformamide, stir and dissolve at 45°C to obtain 6-maleimidocaproic acid solution; (2) Mix the chitosan solution and the 6-maleimidocaproic acid solution, add 0.4 parts of dicyclohexylcarbodiimide and 0.3 parts of 4-N,N-dimethylpyridine, react at 45°C for 12 hours, terminate the reaction, add sodium hydroxide solution to adjust the solution to neutrality, separate, To obtain modified chitosan; (3) under nitrogen protection, 20 parts of polyethylene adipate were stirred and heated to 70°C, 30 parts of isophorone diisocyanate and 0.6 parts of dibutyltin dilaurate were added and reacted for 2 hours to obtain product A; (4) 20 parts of modified chitosan were added to product A and the reaction was continued for 2 hours to obtain product B; (5) the temperature of product B was lowered to 30°C, 10 parts of sodium 2-mercaptoethane sulfonate and 0.6 parts of photoinitiator were added, and after stirring and dispersing, 365 nm ultraviolet light was used to irradiate the reaction for 45 minutes to terminate the reaction, and finally 40 parts of deionized water were added, and the mixture was stirred and emulsified for 20 minutes to obtain a fiber treatment agent;

[0042] S3: (1) 60 parts of flax fiber and 30 parts of wear-resistant fiber are opened and mixed, carded, drawn, roving, spinning and winding in sequence to obtain a crude flax blended yarn; (2) The crude flax blended yarn is immersed in a fiber treating agent, and is subjected to immersion and rolling (one immersion at room temperature for 30 minutes, with a rolling rate of 90%; and a second immersion at room temperature for 5 minutes, with a rolling rate of 90%) and drying to obtain a wear-resistant and antibacterial flax blended yarn.

[0043] Based on Example 1, a control experiment was carried out, specifically Comparative Examples 1 to 4, as described below:

[0044] Comparative Example 1: Comparative Example 1 is based on Example 1, and the raw material ratio of the wear-resistant and antibacterial flax blended yarn is adjusted, and other processes remain unchanged, specifically:

[0045] S3: (1) 60 parts of flax fiber and 5 parts of wear-resistant fiber are opened and mixed, carded, drawn, roving, spinning and winding in sequence to obtain a crude flax blended yarn; (2) The crude flax blended yarn is immersed in a fiber treating agent, and is subjected to immersion and rolling (one immersion at room temperature for 30 minutes, with a rolling rate of 90%; and a second immersion at room temperature for 5 minutes, with a rolling rate of 90%) and drying to obtain a wear-resistant and antibacterial flax blended yarn.

[0046] Comparative Example 2: Comparative Example 2 is based on Example 1, with the following adjustments: acrylic fiber is not added to the wear-resistant fiber, and other processes remain unchanged, specifically:

[0047] S1: Preparation of wear-resistant fiber: (1) Immerse 50 parts of wool fiber in 100 parts of acetone. After immersion for 3 hours, take out, wash, and dry at room temperature to obtain pretreated wool fiber A; (2) Use 280nm ultraviolet light to uniformly irradiate the pretreated cotton fiber for 60 minutes to obtain pretreated wool fiber B; (3) Add 10 parts of mesoporous silica to 20 parts of 1wt% silver nitrate aqueous solution, place at 50°C for 6 hours, and then filter, wash and dry to obtain wear-resistant antibacterial particles; (4) Add 8 parts of wear-resistant antibacterial particles and 0.3 parts of γ-aminopropyltrimethoxysilane to 100 parts of deionized water, stir at 75°C for 30 minutes to obtain wear-resistant antibacterial liquid; (6) Put 50 parts of pretreated wool fiber B into the wear-resistant antibacterial liquid, immerse for 15 minutes, and dry to obtain wear-resistant fiber.

[0048] Comparative Example 3: Comparative Example 3 is based on Example 1, with the following adjustments: no wool fiber treatment is performed, that is, no wear-resistant fiber is prepared, only wool fiber is used, and other processes remain unchanged, specifically:

[0049] S3: (1) 60 parts of flax fiber and 30 parts of wool fiber are opened and mixed, carded, drawn, roving, spun and wound in sequence to obtain a crude flax blended yarn; (2) The crude flax blended yarn is immersed in a fiber treatment agent, and is subjected to immersion and rolling (one immersion at room temperature for 30 minutes, with a rolling rate of 90%; and a second immersion at room temperature for 5 minutes, with a rolling rate of 90%) and drying to obtain a wear-resistant and antibacterial flax blended yarn.

[0050] Comparative Example 4: Comparative Example 4 is based on Example 1, with the following modifications: no fiber treatment agent is used to treat the crude flax blended yarn, and other processes remain unchanged, specifically:

[0051] S3: 60 parts of flax fiber and 30 parts of wear-resistant fiber are opened and mixed in sequence, carded, drawn, roving, spun yarn, and wound to obtain wear-resistant and antibacterial flax blended yarn.

[0052] In the above embodiments, all raw materials are from the following sources: mesoporous silica with a purity of 99%, a particle size of 50-100 nm, and a pore size of 5-10 nm was purchased from Shanghai Duoman Pharmaceutical Chemical Co., Ltd.; silver nitrate, γ-aminopropyltrimethoxysilane, chitosan, and dicyclohexylcarbodiimide with a purity of 99% were purchased from Hubei Yongkuo Technology Co., Ltd.; 6-maleimidocaproic acid, polyethylene adipate, isophorone diisocyanate, and sodium 2-mercaptoethane sulfonate with a purity of 99% were purchased from Shanghai Jinjinle Industrial Co., Ltd.; 4-N,N-dimethylpyridine with a purity of 99%, photoinitiator model IHT-PI MBF, CAS number: 15206-55-0, were purchased from Hubei Jusheng Technology Co., Ltd.

[0053] Performance test: The wear-resistant and antibacterial flax blended yarns prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were uniformly processed into fabrics of the same size, and relevant performance tests were performed in turn. The specific test methods are as follows:

[0054] 1. Antibacterial property: Tested according to the method of GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method". The antibacterial rate is calculated as follows: Antibacterial rate = (AB) / A×100%, where A represents the average value of the viable bacteria concentration in the flask after the control sample is shaken for 18 hours, CFU / mL; B represents the average value of the viable bacteria concentration in the flask after the antibacterial fabric is shaken for 18 hours, CFU / mL;

[0055] 2. Breaking strength: Tested in accordance with GB / T 3923.1-2013 "Tensile properties of textile fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)";

[0056] 3. Pilling resistance: Test according to GB / T 4802.2-2008 "Determination of pilling properties of textile fabrics Part 2: Modified Martindale method".

[0057] The specific data are shown in Table 1 below:

[0058] Table 1

[0059] Examples Antibacterial rate (%) Elongation at break (%) Anti-pilling (grade) Example 1 98.5 20.3 4.5 Example 2 97.3 21.1 4.5 Example 3 97.9 20.4 4.5 Comparative Example 1 92.5 27.1 3.5 Comparative Example 2 95.1 25.3 4 Comparative Example 3 84.3 26.2 3.5 Comparative Example 4 78.4 32.3 3

[0060] Result analysis: From the data in Table 1 above, it can be seen that the wear-resistant and antibacterial flax blended yarn prepared by the present invention has excellent antibacterial performance, reaching up to 98.5%; in addition, from the comprehensive analysis of the elongation at break and the pilling level (greater than 4 is excellent), it can be known that the wear-resistant and antibacterial flax blended yarn prepared by the present invention has strong toughness and wear resistance, that is, the textile is not easy to wrinkle and pill, and is comfortable to wear, which greatly improves the quality and added value of linen fabrics, and is more in line with the current trend of high-end and comfortable clothing.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the spirit and principle of the present invention and within the technical scope disclosed in this application should be included in the protection scope of this application; in the absence of conflict, the embodiments of this application and the features in the embodiments can be combined with each other. Therefore, the protection scope of this application shall be based on the protection scope of the claims.

Claims

1. A process for preparing a wear-resistant and antibacterial flax blended yarn, characterized in that: The following steps are involved: S1: After irradiating the cotton fiber with ultraviolet light, the cotton fiber is placed in a wear-resistant and antibacterial liquid, and then immersed and dried to obtain a wear-resistant fiber; S2: (1) chitosan is modified with 6-maleimidocaproic acid to obtain modified chitosan; (2) polyethylene adipate is sequentially reacted with isophorone diisocyanate, modified chitosan, and sodium 2-mercaptoethane sulfonate, and finally emulsified to obtain a fiber treatment agent; S3: (1) opening and mixing flax fiber and wear-resistant fiber, carding, drawing, roving, spinning and winding in sequence to obtain crude flax blended yarn; (2) soaking the crude flax blended yarn in a fiber treatment agent, and obtaining wear-resistant and antibacterial flax blended yarn through impregnation and rolling and drying.

2. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 1, characterized in that: The preparation method of the wear-resistant fiber is: (1) immersing wool fiber in acetone for 2 to 4 hours, taking out, washing, and drying at room temperature to obtain pretreated wool fiber A; (2) using 280-315 nm ultraviolet light to uniformly irradiate the pretreated cotton fiber for 30-90 min to obtain pretreated wool fiber B; (3) opening and mixing the pretreated wool fiber B and the acrylic fiber to obtain a mixed fiber; (4) adding mesoporous silica to a silver nitrate solution, placing the solution at 40 to 60° C. for 4 to 8 hours, filtering, washing, and drying to obtain wear-resistant and antibacterial particles; (5) adding the wear-resistant antibacterial particles and the silane coupling agent into deionized water, stirring at 70 to 80° C. for 30 to 60 minutes to obtain a wear-resistant antibacterial liquid; (6) The mixed fiber is placed in a wear-resistant and antibacterial liquid, immersed for 10 to 20 minutes, and then dried to obtain a wear-resistant fiber.

3. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 2, characterized in that: The mass ratio of the pretreated wool fiber B and the acrylic fiber is 1:(1-2); the mass ratio of the mesoporous silica and silver nitrate is 50:1, wherein the particle size of the mesoporous silica is 50-100 nm and the pore size is 5-10 nm; the mass ratio of the wear-resistant and antibacterial particles and the mixed fiber is (1-5):25; the silane coupling agent includes any one of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and γ-(β-aminoethyl)aminopropyltrimethoxysilane, and the added amount is 3-5% of the mass of the wear-resistant and antibacterial particles.

4. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 1, characterized in that: The preparation method of the fiber treatment agent is: (1) adding chitosan to a 2-5 v / v% acetic acid aqueous solution, stirring and dissolving at 40-50° C. to obtain a chitosan solution; adding 6-maleimidocaproic acid to dimethylformamide, stirring and dissolving at 40-50° C. to obtain a 6-maleimidocaproic acid solution; (2) mixing the chitosan solution and the 6-maleimidocaproic acid solution, adding a condensation agent and an acylation catalyst thereto, reacting at 40 to 50° C. for 6 to 24 hours, terminating the reaction, adding alkali to adjust the solution to neutrality, and separating to obtain modified chitosan; (3) Under the protection of inert gas, polyethylene adipate is stirred and heated to 60-80° C., and isophorone diisocyanate and dibutyltin dilaurate are added to react for 1-2 hours to obtain product A; (4) adding modified chitosan to product A and continuing the reaction for 1 to 3 hours to obtain product B; (5) lowering the temperature of the product B to 30-40° C., adding sodium 2-mercaptoethane sulfonate and a photoinitiator, stirring and dispersing, irradiating with 365 nm ultraviolet light for 30-60 min, terminating the reaction, and finally adding deionized water, stirring and emulsifying for 30 min to obtain a fiber treatment agent.

5. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 4, characterized in that: The raw materials of the modified chitosan include the following components: by weight, 6-10 parts of chitosan, 3-5 parts of 6-maleimidocaproic acid, 0.12-0.3 parts of a condensing agent, 0.06-0.3 parts of an acylation catalyst, 50 parts of an acetic acid aqueous solution, and 40 parts of dimethylformamide.

6. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 5, characterized in that: The condensing agent includes any one of dicyclohexylcarbodiimide, diisopropylcarbodiimide and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide; and the acylation catalyst includes any one of 4-N,N-dimethylpyridine and 1-hydroxybenzotriazole.

7. The process for preparing the wear-resistant and antibacterial flax blended yarn according to claim 4, characterized in that: The raw materials of the fiber treatment agent include the following components: by weight, 10 parts of polyethylene adipate, 10-20 parts of isophorone diisocyanate, 0.1-0.5 parts of dibutyltin dilaurate, 5-10 parts of modified chitosan, 2-5 parts of sodium 2-mercaptoethane sulfonate, 0.1-0.5 parts of photoinitiator, and 10-20 parts of deionized water.

8. The process for preparing a wear-resistant and antibacterial flax blended yarn according to claim 1, characterized in that: The dipping and rolling method is: two dipping and two rolling, one dipping at room temperature for 30 to 60 minutes, the rolling rate is 90±5%; and then two dipping at room temperature for 5 to 10 minutes, the rolling rate is 90±5%.

9. The wear-resistant and antibacterial flax blended yarn prepared by the process for preparing the wear-resistant and antibacterial flax blended yarn according to any one of claims 1 to 8, characterized in that: The wear-resistant and antibacterial flax blended yarn comprises the following components: 20 to 70 parts by weight of flax fiber and 10 to 50 parts by weight of wear-resistant fiber.