Knitted fabric and preparation method and application thereof

Abstract

The invention relates to a knitted fabric and a preparation method and application thereof, the knitted fabric is prepared by blending fibers, and the fibers comprise long stapled cotton, rare earth viscose and mulberry silk. The knitted fabric is prepared by combining the long stapled cotton, the rare earth viscose fiber and the mulberry silk, a synergistic effect is generated, the knitted fabric has the functions of moisture absorption, quick drying, antibiosis and light weight, the sunscreen performance of the fabric is greatly improved, and the UVA shielding rate reaches 90% or above.

Description

Technical Field

[0001] The invention relates to the field of textile technology, and in particular to a knitted fabric and a preparation method and application thereof. Background Art

[0002] In today's textile and clothing industry, consumers' requirements for the performance of knitted fabrics are becoming increasingly diverse and refined. Knitted fabrics are widely used in various types of clothing and home textile products due to their softness, comfort and good elasticity.

[0003] For example, CN109371550A discloses a knitted fabric, the knitting yarn of the knitted fabric includes a first yarn and a second yarn, the first yarn is a blended yarn of long-staple cotton fiber and Lenzing Modal fiber, the second yarn is Lycra spandex, at least one front knitting yarn is bent into a front knitting loop, and at least one rear knitting yarn is bent into a rear knitting loop. By continuously looping the rear knitting loop and the front knitting loop, the knitted fabric obtained is soft and comfortable.

[0004] As the global climate warms and people pursue more outdoor sports, the damage of ultraviolet rays to human skin has gradually received attention. Applying sunscreen as the most traditional way of sun protection has many limitations. Sunscreen is easily ineffective due to sweating and wiping, and the chemical ingredients in sunscreen may cause allergic reactions in some people. Therefore, sun-proof fabrics have been widely studied.

[0005] For example, CN114717734A discloses a sunscreen knitted fabric, which is knitted from yarn 1 and yarn 2, wherein yarn 1 is a blended yarn of cotton and modal, and yarn 2 is a stretch polyester fiber. The obtained knitted fabric can not only protect against the sun, but also take into account the performance of comfort and breathability. However, the function of this fabric is still relatively simple. CN102774058A discloses a sunscreen whitening fabric, which includes a surface layer, a base layer and an inner layer. The surface layer is an anti-ultraviolet coating, which is a polyurethane coating containing bamboo charcoal particles; the inner layer is a whitening fabric layer, which is formed on the inner side of the base layer through a single-sided knitting process, and is a blended knitted layer of pearl fiber strips and natural silk; the base layer is a blended woven fabric layer of polyester and spandex. The bonding strength between adjacent layers of this fabric is high, the surface layer has an anti-ultraviolet function, and the inner layer has the effect of whitening the skin; at the same time, the fabric has a soft texture, excellent elasticity, high washability, and a long service life. However, the sunscreen effect of this fabric mainly depends on post-finishing, and the sunscreen effect is not good enough.

[0006] Although there are many sun-proof fabrics in the prior art, these products have relatively simple functions, mainly rely on post-finishing to achieve, and have low anti-ultraviolet index.

[0007] Therefore, knitted fabrics with multiple functions such as moisture absorption, quick drying, antibacterial, lightweight, and sunscreen have gradually become a popular demand in the market. Such functional fabrics can not only improve the wearing comfort but also meet people's usage requirements in different scenarios to a certain extent, such as sports and fitness, outdoor activities, etc. How to provide a knitted fabric with the functions of moisture absorption and quick drying, antibacterial, lightweight, and sunscreen and its preparation method is an urgent problem to be solved in this field. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides a knitted fabric, its preparation method, and application. The knitted fabric is prepared by blending long-staple cotton, rare-earth viscose fiber, and mulberry silk, and has the functions of moisture absorption and quick drying, antibacterial, lightweight, and sunscreen.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] In the first aspect, the present invention provides a knitted fabric, which is prepared by blending fibers, and the fibers include long-staple cotton, rare-earth viscose fiber, and mulberry silk.

[0011] The present invention prepares a knitted fabric by blending long-staple cotton, rare-earth viscose fiber, and mulberry silk in a compound manner. Long-staple cotton fibers have more hydrophilic groups, such as hydroxyl groups, which can form hydrogen bonds with water molecules, thus having good moisture absorption. Its fiber structure is relatively loose, with more voids to accommodate water, and the fibers of long-staple cotton are longer, and the transmission path of water in the fiber is relatively smooth, which is conducive to the absorption and conduction of water. Viscose fiber itself has high moisture absorption performance. Its molecular structure contains a large number of hydroxyl groups, which can quickly absorb water. After introducing rare earth, it has excellent ultraviolet resistance. Mulberry silk is composed of proteins, and the protein molecules contain various hydrophilic groups, such as amino groups and carboxyl groups, which make it have good moisture absorption. And mulberry silk fibers have a unique porous structure. These pores can store a large amount of water, and the diffusion rate of water in the pores is relatively fast, which helps to achieve the quick drying effect. Long-staple cotton and mulberry silk fibers themselves also have a certain absorption and blocking effect on ultraviolet rays. Their fiber structures and chemical compositions can absorb a part of ultraviolet rays. And in the blended fabric, the interweaving and overlapping of fibers form a complex micro-structure, which can further scatter and reflect ultraviolet rays, and cooperate with rare-earth viscose fiber to improve the overall sunscreen performance of the fabric. The prepared knitted fabric is lightweight and will not bring too much burden to the body when worn, and has good wearing comfort.

[0012] Preferably, the fibers include the following components by weight: 50-60 parts of long-staple cotton, 30-40 parts of rare-earth viscose fiber, and 8-15 parts of mulberry silk.

[0013] The weight parts of the long-staple cotton can be, for example, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, etc.

[0014] The weight parts of the rare-earth viscose fiber can be, for example, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, etc.

[0015] The weight parts of the mulberry silk can be, for example, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, etc.

[0016] Preferably, the rare-earth viscose fiber is prepared by spinning a viscose spinning solution containing a rare-earth material.

[0017] Preferably, the rare-earth material includes any one or a combination of at least two of cerium oxide, yttrium oxide, or samarium oxide, and further preferably a combination of cerium oxide, yttrium oxide, and samarium oxide.

[0018] Preferably, the rare-earth material includes, by weight: 20-30 parts of cerium oxide, 2-4 parts of yttrium oxide, and 2-4 parts of samarium oxide.

[0019] The weight parts of the cerium oxide can be, for example, 22 parts, 23 parts, 24 parts, 25 parts, 27 parts, 29 parts, etc.

[0020] The weight parts of the yttrium oxide can be, for example, 2.25 parts, 2.5 parts, 3 parts, 3.5 parts, 3.75 parts, etc.

[0021] The weight parts of the samarium oxide can be, for example, 2.25 parts, 2.5 parts, 3 parts, 3.5 parts, 3.75 parts, etc.

[0022] Preferably, the concentration of the rare-earth material in the viscose spinning solution containing the rare-earth material is 25-100 g / L, and can be, for example, 30 g / L, 40 g / L, 50 g / L, 60 g / L, 70 g / L, 80 g / L, 90 g / L, etc.

[0023] Preferably, the method for preparing the viscose spinning solution containing the rare-earth material includes: mixing a rare-earth material suspension and a viscose spinning stock solution to obtain the viscose spinning solution containing the rare-earth material, and the rare-earth material suspension includes the rare-earth material.

[0024] Preferably, the mixing of the rare-earth material suspension and the viscose spinning stock solution is carried out under stirring conditions, the stirring rate is 400-500 r / min, such as 420 r / min, 440 r / min, 460 r / min, 480 r / min, etc., and the mixing time is 20-30 min, such as 22 min, 24 min, 26 min, 28 min, etc.

[0025] Preferably, the rare earth material suspension further comprises a dispersant.

[0026] Preferably, the dispersant comprises a maleic acid styrene-based dispersant.

[0027] Preferably, the rare earth material suspension further comprises water and / or an alkali solution.

[0028] Preferably, the concentration of the alkali solution is 0.5 - 1.5 mol / L, and can be, for example, 0.7 mol / L, 0.9 mol / L, 1.1 mol / L, 1.2 mol / L, 1.3 mol / L, etc., and is preferably 1 mol / L.

[0029] Preferably, the alkali solution comprises any one or a combination of at least two of sodium hydroxide solution, potassium hydroxide solution or ammonia water.

[0030] Preferably, the rare earth suspension comprises, by weight: 20 - 30 parts of cerium oxide, 2 - 4 parts of yttrium oxide, 2 - 4 parts of samarium oxide, 10 - 12 parts of dispersant, 60 - 70 parts of water, 3 - 5 parts of alkali solution.

[0031] The weight parts of the cerium oxide can be, for example, 22 parts, 23 parts, 24 parts, 25 parts, 27 parts, 29 parts, etc.

[0032] The weight parts of the yttrium oxide can be, for example, 2.25 parts, 2.5 parts, 3 parts, 3.5 parts, 3.75 parts, etc.

[0033] The weight parts of the samarium oxide can be, for example, 2.25 parts, 2.5 parts, 3 parts, 3.5 parts, 3.75 parts, etc.

[0034] The weight parts of the dispersant can be, for example, 10.2 parts, 10.5 parts, 11 parts, 11.2 parts, 11.7 parts, etc.

[0035] The weight parts of the water can be, for example, 62 parts, 63 parts, 65 parts, 66 parts, 68 parts, etc.

[0036] The weight parts of the alkali solution can be, for example, 3.2 parts, 3.5 parts, 4 parts, 4.5 parts, 4.8 parts, etc.

[0037] Preferably, the preparation method of the rare earth suspension comprises: mixing all components of the rare earth material suspension and then performing ball milling and dispersion to obtain the rare earth material suspension.

[0038] Preferably, the grinding medium for the ball milling and dispersion is zirconia balls.

[0039] Preferably, the diameter of the zirconia balls is 0.08 - 0.12 mm, such as 0.09 mm, 0.10 mm, 0.11 mm, etc.

[0040] Preferably, the ball material ratio of the ball milling dispersion is 3-5:1, such as 3.5:1, 4:1, 4.5:1, etc.

[0041] Preferably, the temperature of the ball milling dispersion is 23-25°C, such as 23.5°C, 24°C, 24.5°C, etc., and the time is 20-30 min, such as 22 min, 25 min, 27 min, etc.

[0042] Preferably, the rotation speed of the ball milling dispersion is 300-400 r / min, such as 320 r / min, 350 r / min, 370 r / min, etc.

[0043] Preferably, the rare earth viscose fiber is prepared by the following method, which includes: spinning the viscose spinning solution containing rare earth materials to obtain the rare earth viscose fiber.

[0044] Preferably, before the spinning, it further includes the steps of standing, defoaming, and filtering the viscose spinning solution.

[0045] Preferably, the rare earth viscose fiber is an antibacterial modified rare earth viscose fiber.

[0046] Preferably, the antibacterial agent for the antibacterial modification includes a carboxymethylated lignin nanosilver composite.

[0047] In the present invention, the carboxymethylated lignin contains a large number of carboxyl groups and hydroxyl groups, and these groups can bind to the silver nanoparticles through electrostatic interaction and hydrogen bonding, so as to uniformly disperse the silver nanoparticles to prepare an antibacterial agent, and further effectively improve the antibacterial ability of the silver nanoparticles.

[0048] Preferably, the antibacterial agent is prepared by the following method, which includes: reacting carboxymethylated lignin, a silver salt, and a reducing agent to obtain the antibacterial agent.

[0049] Preferably, the silver salt includes any one or a combination of at least two of silver oxalate, silver acetate, or silver nitrate, and silver nitrate is preferred.

[0050] Preferably, the reducing agent includes any one or a combination of at least two of glucose, sodium ascorbate, or sodium citrate, and sodium citrate is preferred.

[0051] Preferably, the reaction time is 2-3 h, such as 2.2 h, 2.4 h, 2.6 h, 2.8 h, etc., and the temperature is 80-85°C, such as 81°C, 82°C, 83°C, 84°C, etc.

[0052] Preferably, the silver salt, the reducing agent, and the carboxymethylated lignin include, by weight: 5-8 parts of the silver salt, 2-3 parts of the reducing agent, and 1-2 parts of the carboxymethylated lignin.

[0053] The weight parts of the silver salt can be, for example, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, etc.

[0054] The weight parts of the reducing agent can be, for example, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, etc.

[0055] The weight parts of the carboxymethylated lignin can be, for example, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, etc.

[0056] Preferably, the preparation method of the antibacterial agent comprises the following steps:

[0057] (1) Dissolve silver nitrate and carboxymethylated lignin in water, ultrasonically disperse and mix to obtain a mixed solution;

[0058] (2) Dissolve sodium citrate in water, ultrasonicate to obtain a sodium citrate solution, mix the mixed solution and the sodium citrate solution and react for 2 - 3 h, the reaction temperature is 80 - 85 °C, after the reaction is completed, wash the solid product and freeze-dry to obtain the antibacterial agent.

[0059] Preferably, the carboxymethylated lignin is prepared by the following method, which comprises: reacting lignin with sodium haloacetate under alkaline conditions to obtain the carboxymethylated lignin.

[0060] Preferably, the carboxymethylated lignin is prepared by the following method, which comprises:

[0061] (1) Add a sodium hydroxide solution to the ethanol biorefinery residue, stir, centrifuge to remove insoluble substances, adjust the pH to 2 - 3 with hydrochloric acid, centrifuge to remove the supernatant, soak and wash the solid, and freeze-dry to obtain lignin;

[0062] (2) Add the lignin to a sodium hydroxide solution and stir, add sodium chloroacetate, react for 4 - 5 h, the reaction temperature is 70 - 75 °C, after the reaction is completed, adjust the pH to 6.5 - 7.5 with hydrochloric acid, centrifuge, dialyze, concentrate, and freeze-dry to obtain the carboxymethylated lignin.

[0063] Preferably, the antibacterial modified rare earth viscose fiber is prepared by the following method, which comprises:

[0064] Provide an antibacterial agent dispersion, which comprises a combination of the antibacterial agent and water;

[0065] Coat the antibacterial agent dispersion on the rare earth viscose fiber and dry to obtain the antibacterial modified rare earth viscose fiber.

[0066] Rare earth viscose fiber is modified with an antibacterial agent. The nanosilver particles in the antibacterial agent can reflect and absorb ultraviolet rays, thereby improving the fiber's anti-ultraviolet performance. The rare earth viscose fiber itself has a certain anti-ultraviolet ability. After modification, its ultraviolet protection ability will be further improved. At the same time, the nanosilver particles can release silver ions, which can combine with the thiol groups of the bacterial cell membrane, destroy the integrity of the cell membrane, and cause bacterial death. The nanosilver particles can also produce a photothermal effect, further enhancing the antibacterial effect under light, thereby effectively improving the antibacterial and anti-ultraviolet capabilities of the rare earth viscose fiber.

[0067] Preferably, the rare earth viscose fiber is pretreated before the coating, and the pretreatment comprises: soaking the rare earth viscose fiber in an alcohol solvent, washing with water after soaking, and drying to obtain the pretreated rare earth viscose fiber.

[0068] Preferably, the antibacterial modified rare earth viscose fiber is prepared by the following method, which comprises:

[0069] (1) soaking the rare earth viscose fiber in anhydrous ethanol, washing with water after soaking, and drying to obtain the pretreated rare earth viscose fiber;

[0070] (2) adding the antibacterial agent into water, dispersing it by ultrasonication to obtain an antibacterial agent dispersion, spraying the antibacterial agent dispersion onto the pretreated rare earth viscose fiber, and drying to obtain the antibacterial modified rare earth viscose fiber.

[0071] In a second aspect, the present invention provides a method for preparing the knitted fabric as described in the first aspect, the preparation method comprising the following steps:

[0072] The knitted fabric is obtained by compounding and blending long-staple cotton, rare earth viscose fiber and mulberry silk.

[0073] Preferably, the needle pitch density of the blended fabric is 35-37G, for example, it may be 35.2G, 35.4G, 35.6G, 36.2G, 36.4G, 36.6G, etc., preferably 36G.

[0074] The present invention uses a specific knitting structure and process to weave long-staple cotton, rare earth viscose fiber, and mulberry silk into a fabric with specific performance according to design requirements. The specific needle pitch density can make the three fibers of long-staple cotton, rare earth viscose, and mulberry silk evenly distributed during the weaving process, interweaving tightly and stably, giving full play to the performance advantages of each fiber, and ensuring that the various functions of the fabric are balanced. The present invention selects a specific needle pitch density, and the fabric obtained has both strength and sun protection effect. If the needle pitch density is too high, knitted fabric cannot be formed; if the needle pitch density is too low, the fabric strength is reduced.

[0075] Preferably, the blended weave needle-out modes include plain weave and floating weave.

[0076] Preferably, the needle - out method of two paths in the blended yarn includes float yarns.

[0077] The plain - weave structure makes the fabric surface flat, with uniform texture. The fiber distribution is relatively tight and regular, which is beneficial for each fiber to fully exert its own characteristics. In terms of moisture absorption and quick - drying, it can allow the fibers to fully contact sweat and moisture, accelerating water absorption and conduction. In terms of antibacterial property, the tight structure can reduce the chance of bacteria attachment and entry into the fabric interior. In terms of sun protection, it can increase the reflection and scattering of ultraviolet rays in the fabric, resist ultraviolet rays, and improve the sun - protection effect. The existence of float yarns increases the softness and elasticity of the fabric, making the fabric more conform to the human body curve, increasing the contact area with the skin. At the same time, the float yarns form some additional voids and channels in the fabric, which is beneficial for air circulation, promoting moisture dissipation, enhancing the quick - drying effect, and also contributing to heat dissipation, making the fabric have a light and comfortable wearing feeling. If the number of float yarns is too small, the effect of increasing the softness and elasticity of the fabric cannot be achieved; if the number of float yarns is too large, the sun - protection effect will deteriorate.

[0078] Preferably, the specific blending method is plain - weave needle - out for 1, 2, 3, 4, 5, 6, 7, 8, 9, 11 paths, plain - weave, float - yarn, plain - weave, float - yarn needle - out for 10 paths, and float - yarn, plain - weave, float - yarn, plain - weave needle - out for 12 paths.

[0079] Preferably, the woven yarn length of the blend is 100 - 125 mm / 50 coils, for example, it can be 102 mm / 50 coils, 106 mm / 50 coils, 108 mm / 50 coils, 112 mm / 50 coils, 120 mm / 50 coils, etc., and preferably 105 - 110 mm / 50 coils.

[0080] Preferably, after the blending, it further includes the steps of dyeing, drying, and stentering.

[0081] In a third aspect, the present invention provides a piece of clothing, which includes the knitted fabric as described in the first aspect.

[0082] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention prepares a knitted fabric through the combination of long - staple cotton, rare - earth viscose fiber, and mulberry silk, which produces a synergistic effect, making the knitted fabric have the functions of moisture absorption, quick - drying, antibacterial, and light weight, and greatly improving the sun - protection performance of the fabric, with the UVA shielding rate reaching more than 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Figure 1 It is a process flow chart of the preparation of the knitted fabric used in Example 1 of the present invention.

[0084] Figure 2This is the knitted fabric structure diagram adopted in Example 1 of the present invention. Detailed implementation mode

[0085] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific implementation modes. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the patent protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0086] Preparation Example 1

[0087] The antibacterial modified rare earth viscose fiber A1 is prepared by the following method:

[0088] S1: Preparation of rare earth viscose fiber

[0089] S1.1: After mixing 20 parts by weight of cerium oxide, 2 parts by weight of yttrium oxide and 2 parts by weight of samarium oxide evenly, a rare earth mixed powder is obtained. Then, 10 parts by weight of styrene maleate dispersant and 60 parts by weight of deionized water are added, and 3 parts by weight of 1 mol / L sodium hydroxide solution is added. Stir and mix at 200 r / min for 20 min to obtain a mixture.

[0090] S1.2: Add the mixture to a ball mill and use 0.1 mm zirconia balls for ball milling. The ball-to-material ratio is controlled at 3:1, and ball milling is carried out at 23 °C and 300 r / min for 20 min to obtain a rare earth suspension.

[0091] S1.3: Add 20 parts by weight of the rare earth suspension to 100 parts by weight of viscose spinning solution, stir and mix at 400 r / min for 20 min to obtain a spinning mixture. The spinning mixture is allowed to stand, degassed, filtered, and then spun and formed by a conventional spinning process to obtain rare earth viscose fiber.

[0092] S2: Preparation of carboxymethylated lignin

[0093] S2.1: Add 30 parts by weight of 1 mol / L sodium hydroxide solution to 20 parts by weight of ethanol biogas fermentation residue, stir for 12 h, centrifuge to remove insoluble substances, then add hydrochloric acid to adjust the pH to 2, centrifuge to remove the supernatant, repeat the pH adjustment and centrifugation 2 times, soak and wash the solid with deionized water until the pH of the washing liquid is neutral, and finally obtain lignin after freeze-drying.

[0094] S2.2: Add 4 parts by weight of lignin to 20 parts by weight of 1 mol / L sodium hydroxide solution and stir until fully dissolved. Then, add 0.3 parts by weight of sodium chloroacetate, and react at 70 °C for 4 h. After the reaction is completed, adjust the pH to neutral with 0.5 mol / L hydrochloric acid, then centrifuge, dialyze, concentrate, and freeze-dry to obtain carboxymethylated lignin.

[0095] S3: Preparation of Antibacterial Agent

[0096] S3.1: Dissolve 0.5 parts by weight of silver nitrate and 0.1 part by weight of carboxymethylated lignin in 20 parts by weight of deionized water respectively, ultrasonically disperse for 5 min, and then mix them to obtain a mixed solution;

[0097] S3.2: Dissolve 0.2 parts by weight of sodium citrate in 15 parts by weight of deionized water, ultrasonically treat for 20 min to obtain a sodium citrate solution. Then add the mixed solution and the sodium citrate solution into 40 parts by weight of deionized water heated under reflux in an 80 °C oil bath, and react for 2 h. After the reaction is completed, wash the solid reactant with deionized water twice, and then perform freeze-drying to obtain the antibacterial agent;

[0098] S4: Preparation of Antibacterial Modified Rare Earth Viscose Fiber A1

[0099] S4.1: Immerse the rare earth viscose fiber in anhydrous ethanol with a mass 2 times that of the fiber for 10 min. After immersion, wash the viscose fabric with deionized water twice, and dry it in an oven at 50 °C to obtain the pretreated rare earth viscose fiber;

[0100] S4.2: Add 0.02 parts by weight of the antibacterial agent into 10 parts by weight of deionized water, ultrasonically disperse for 20 min to obtain an antibacterial agent dispersion. Spray the antibacterial agent dispersion onto the rare earth viscose fiber with a spray gun, and then dry it in an oven at 40 °C for 5 h to obtain the antibacterial modified rare earth viscose fiber A1.

[0101] Preparation Example 2

[0102] The antibacterial modified rare earth viscose fiber A2 is prepared by the following method:

[0103] S1: Preparation of Rare Earth Viscose Fiber

[0104] S1.1: Mix 20 parts by weight of cerium oxide, 2 parts by weight of yttrium oxide and 2 parts by weight of samarium oxide evenly to obtain a rare earth mixed powder. Then add 10 parts by weight of maleic acid styrene-based dispersant, 60 parts by weight of deionized water, and 3 parts by weight of 1 mol / L sodium hydroxide solution, and stir and mix at 300 r / min for 30 min to obtain a mixture;

[0105] S1.2: Add the mixture into a ball mill, use 0.1 mm zirconia balls for ball milling, control the ball-to-material ratio at 3:1, and ball mill at 25 °C and 400 r / min for 30 min to obtain a rare earth suspension;

[0106] S1.3: Add 20 parts by weight of rare earth suspension to 100 parts by weight of viscose spinning dope, stir and mix at 500 r / min for 30 min to obtain a spinning mixture. Let the spinning mixture stand, degas, and filter, and then spin and form it by the conventional spinning process to obtain rare earth viscose fiber;

[0107] S2: Preparation of carboxymethylated lignin

[0108] S2.1: Add 30 parts by weight of sodium hydroxide solution to 20 parts by weight of ethanol biogas residue, stir for 14 h, then centrifuge to remove insoluble substances. After that, add hydrochloric acid to adjust the pH to 2, centrifuge to remove the supernatant, repeat the pH adjustment and centrifugation 3 times, soak and wash the solid with deionized water until the pH of the washing liquid is neutral, and finally obtain lignin after freeze-drying;

[0109] S2.2: Add 4 parts by weight of lignin to 20 parts by weight of sodium hydroxide solution and stir until completely dissolved. Then add 0.3 parts by weight of sodium chloroacetate, react at 75 °C for 5 h. After the reaction is completed, adjust the pH to neutral with 0.5 mol / L hydrochloric acid, then centrifuge, dialyze, concentrate, and freeze-dry to obtain carboxymethylated lignin;

[0110] S3: Preparation of antibacterial agent

[0111] S3.1: Dissolve 0.5 parts by weight of silver nitrate and 0.1 parts by weight of carboxymethylated lignin in 20 parts by weight of deionized water respectively, ultrasonically disperse for 10 min, and then mix them to obtain a mixed solution;

[0112] S3.2: Dissolve 0.2 parts by weight of sodium citrate in 15 parts by weight of deionized water, ultrasonically disperse for 30 min to obtain a sodium citrate solution. Then add the mixed solution and the sodium citrate solution to 40 parts by weight of deionized water heated and refluxed in an 85 °C oil bath, and react for 3 h. After the reaction is completed, wash the solid reactant with deionized water 3 times, and then perform freeze-drying to obtain the antibacterial agent;

[0113] S4: Preparation of antibacterial modified rare earth viscose fiber A2

[0114] S4.1: Immerse the rare earth viscose fiber in 2 times its mass of absolute ethanol for 20 min. After soaking, wash the viscose fabric with deionized water 3 times and dry it in an oven at 60 °C to obtain the pretreated rare earth viscose fiber;

[0115] S4.2: Add 0.02 parts by weight of antibacterial agent to 10 parts by weight of deionized water, ultrasonically disperse for 30 min to obtain an antibacterial agent dispersion. Spray the antibacterial agent dispersion onto the rare earth viscose fiber with a spray gun, and then dry it in an oven at 50 °C for 8 h to obtain the antibacterial modified rare earth viscose fiber A2.

[0116] Preparation Example 3

[0117] The antibacterial modified rare earth viscose fiber A3 is prepared by the following method:

[0118] S1: Preparation of rare earth viscose fiber

[0119] S1.1: After mixing 30 parts by weight of cerium oxide, 4 parts by weight of yttrium oxide and 4 parts by weight of samarium oxide evenly, a rare earth mixed powder is obtained. Then, 12 parts by weight of styrene maleate dispersant and 70 parts by weight of deionized water are added, and then 5 parts by weight of 1 mol / L sodium hydroxide solution is added. Stir and mix at 200 r / min for 20 min to obtain a mixture;

[0120] S1.2: Add the mixture to a ball mill and use 0.1 mm zirconia balls for ball milling. Control the ball-to-material ratio at 5:1 and ball mill at 23 °C and 300 r / min for 20 min to obtain a rare earth suspension;

[0121] S1.3: Add 30 parts by weight of the rare earth suspension to 120 parts by weight of viscose spinning dope, stir and mix at 400 r / min for 20 min to obtain a spinning mixture. Let the spinning mixture stand, defoam, filter, and then spin and form by the conventional spinning process to obtain rare earth viscose fiber;

[0122] S2: Preparation of carboxymethylated lignin

[0123] S2.1: Add 40 parts by weight of sodium hydroxide solution to 30 parts by weight of ethanol biogasification residue, stir for 14 h, then centrifuge to remove insoluble substances. Then add hydrochloric acid to adjust the pH to 3, centrifuge to remove the supernatant, repeat the pH adjustment and centrifugation 2 times, soak and wash the solid with deionized water until the pH of the washing liquid is neutral, and finally obtain lignin after freeze-drying;

[0124] S2.2: Add 5 parts by weight of lignin to 30 parts by weight of sodium hydroxide solution and stir until completely dissolved. Then add 0.5 parts by weight of sodium chloroacetate, and then react at 70 °C for 4 h. After the reaction is completed, adjust the pH to neutral with 0.5 mol / L hydrochloric acid, then centrifuge, dialyze, concentrate, and freeze-dry to obtain carboxymethylated lignin;

[0125] S3: Preparation of antibacterial agent

[0126] S3.1: Dissolve 0.8 parts by weight of silver nitrate and 0.2 parts by weight of carboxymethylated lignin in 30 parts by weight of deionized water respectively, ultrasonically disperse for 5 min, and then mix them to obtain a mixed solution;

[0127] S3.2: Dissolve 0.3 parts by weight of sodium citrate in 20 parts by weight of deionized water, and ultrasonicate for 20 min to obtain a sodium citrate solution. Then, add the mixed solution and the sodium citrate solution to 50 parts by weight of deionized water heated to reflux in an 80 °C oil bath, and react for 2 h. After the reaction is completed, wash the solid reactant twice with deionized water, and then perform freeze-drying to obtain the antibacterial agent;

[0128] S4: Preparation of antibacterial modified rare earth viscose fiber A3

[0129] S4.1: Immerse the rare earth viscose fiber in anhydrous ethanol with a mass 3 times that of the fiber for 10 min. After immersion, wash the viscose fabric twice with deionized water, and dry it in an oven at 50 °C to obtain the pretreated rare earth viscose fiber;

[0130] S4.2: Add 0.03 parts by weight of the antibacterial agent to 12 parts by weight of deionized water, and ultrasonically disperse for 20 min to obtain an antibacterial agent dispersion. Spray the antibacterial agent dispersion onto the rare earth viscose fiber with a spray gun, and then dry it in an oven at 40 °C for 5 h to obtain the antibacterial modified rare earth viscose fiber A3.

[0131] Preparation Example 4

[0132] Antibacterial modified rare earth viscose fiber A4, the preparation method of which is only different from that of Preparation Example 1 in that carboxymethylated lignin is not added in step S3.1, that is, only silver nitrate solution and sodium citrate solution are reacted according to the conditions of S3.2 to obtain the antibacterial agent, and other materials, dosages and preparation methods are the same as those of Preparation Example 1.

[0133] Example 1

[0134] A knitted fabric, which is prepared by fiber blending. The fibers include the following components by weight: 55 parts of long-staple cotton, 35 parts of antibacterial modified rare earth viscose fiber A1, and 10 parts of mulberry silk.

[0135] The process flow chart of the knitted fabric used in Example 1 is as Figure 1 shown. Briefly, first use carboxymethylated lignin to prepare the antibacterial agent. Then use the antibacterial agent and rare earth viscose fiber to prepare the antibacterial modified rare earth viscose fiber. Finally, prepare the knitted fabric.

[0136] The preparation method of the knitted fabric includes the following steps:

[0137] (1) Compound and blend 55 parts by weight of long-staple cotton, 35 parts by weight of antibacterial modified rare earth viscose fiber, and 10 parts by weight of mulberry silk to prepare blended fibers, and use a 36G single-sided circular knitting machine with a knitting line length of 105 mm and 50 coils for knitting. The knitted fabric structure diagram used in Example 1 is as Figure 2As shown, specifically, the needles emerge in plain weave for paths 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, in plain weave, plain weave, plain weave, plain weave; in plain weave, float, plain weave, float for path 10; and in float, plain weave, float, plain weave for path 12, to obtain the knitted fabric;

[0138] (2) Dye, dry, and stentor set the knitted fabric to obtain the said knitted fabric.

[0139] Example 2

[0140] A knitted fabric is prepared by fiber blending. The fibers include the following components by weight: 55 parts of long-staple cotton, 35 parts of antibacterial modified rare-earth viscose fiber A2, and 10 parts of mulberry silk.

[0141] The preparation method of the said knitted fabric includes the following steps:

[0142] (1) Mix 55 parts by weight of long-staple cotton, 35 parts by weight of antibacterial modified rare-earth viscose fiber, and 10 parts by weight of mulberry silk to prepare blended fibers. Use a 36G single-sided circular knitting machine, with a weaving thread length of 105 mm and 50 coils for knitting. Specifically, the needles emerge in plain weave for paths 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, in plain weave, plain weave, plain weave, plain weave; in plain weave, float, plain weave, float for path 10; and in float, plain weave, float, plain weave for path 12, to obtain the knitted fabric;

[0143] (2) Dye, dry, and stentor set the knitted fabric to obtain the said knitted fabric.

[0144] Example 3

[0145] A knitted fabric is prepared by fiber blending. The fibers include the following components by weight: 55 parts of long-staple cotton, 35 parts of antibacterial modified rare-earth viscose fiber A3, and 10 parts of mulberry silk.

[0146] The preparation method of the said knitted fabric includes the following steps:

[0147] (1) Mix 55 parts by weight of long-staple cotton, 35 parts by weight of antibacterial modified rare-earth viscose fiber, and 10 parts by weight of mulberry silk to prepare blended fibers. Use a 36G single-sided circular knitting machine, with a weaving thread length of 110 mm and 50 coils for knitting. Specifically, the needles emerge in plain weave for paths 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, in plain weave, plain weave, plain weave, plain weave; in plain weave, float, plain weave, float for path 10; and in float, plain weave, float, plain weave for path 12, to obtain the knitted fabric;

[0148] (2) Dye, dry, and stentor set the knitted fabric to obtain the said knitted fabric.

[0149] Example 4

[0150] A knitted fabric, which differs from Example 1 only in that the antibacterial modified rare earth viscose fiber A1 is replaced by an equal mass portion of rare earth viscose fiber (the rare earth viscose fiber obtained in step S1 of Preparation Example 1), and other components, amounts, and preparation methods are the same as those in Example 1.

[0151] Example 5

[0152] A knitted fabric, which differs from Example 1 only in that the antibacterial modified rare earth viscose fiber A1 is replaced by the antibacterial modified rare earth viscose fiber A4; other components, amounts, and preparation methods are the same as those in Example 1.

[0153] Comparative Example 1

[0154] A knitted fabric, which differs from Example 1 only in that the fiber comprises the following components by weight: 35 parts of antibacterial modified rare earth viscose fiber and 10 parts of mulberry silk; other components, dosages, and preparation methods are the same as those in Example 1.

[0155] Comparative Example 2

[0156] A knitted fabric, which differs from Example 1 only in that the fibers include the following components by weight: 55 parts of long-staple cotton and 10 parts of mulberry silk; other components, dosages, and preparation methods are the same as those in Example 1.

[0157] Comparative Example 3

[0158] A knitted fabric, which differs from Example 1 only in that the fibers include the following components by weight: 55 parts of long-staple cotton and 35 parts of antibacterial modified rare earth viscose fibers; other components, dosages, and preparation methods are the same as those in Example 1.

[0159] The moisture absorption and quick-drying performance of the knitted fabrics prepared in the examples and comparative examples were measured with reference to GB / T21655.1-2023. The measurement results are shown in Table 1.

[0160] With reference to GB / T20944.3-2008 and GBT18830 2009, the antibacterial properties and anti-ultraviolet properties of the knitted fabrics prepared in Examples 1-3 and Comparative Example 1 were measured. The measurement results are shown in Table 1.

[0161] Test Results

[0162] Table 1

[0163]

[0164] The test results show that:

[0165] (1) By comparing Examples 1 - 7 with Comparative Examples 1 - 3, it can be seen that through the combination of long - staple cotton, rare - earth viscose fiber and mulberry silk, the knitted fabric of the present invention has the functions of moisture absorption, quick - drying, antibacterial, lightweight and sunscreen.

[0166] (2) By comparing Example 1 with Example 4, it can be seen that using antibacterial - agent - modified rare - earth viscose fiber can further improve the antibacterial and anti - ultraviolet ability of the knitted fabric.

[0167] (3) By comparing Example 1 with Example 5, it can be seen that nano - silver and carboxymethylated lignin can effectively improve the antibacterial ability of nano - silver through electrostatic interaction and hydrogen - bond interaction.

[0168] In summary, the present invention prepares a knitted fabric through the combination of long - staple cotton, rare - earth viscose fiber and mulberry silk, which produces a synergistic effect, enabling the knitted fabric to have the functions of moisture absorption, quick - drying, antibacterial and lightweight, and greatly improving the sunscreen performance of the fabric, with the UVA shielding rate reaching more than 90%.

[0169] The applicant declares that the above - mentioned is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A knitted fabric, characterized in that, The knitted fabric is prepared by fiber blending, and the fibers include long-staple cotton, rare-earth viscose fiber, and mulberry silk.

2. The knitted fabric according to claim 1, characterized in that, The fibers include the following components by weight parts: 50-60 parts of long-staple cotton, 30-40 parts of rare-earth viscose fiber, and 8-15 parts of mulberry silk.

3. The knitted fabric according to claim 1 or 2, characterized in that, The rare-earth viscose fiber is prepared by spinning a viscose spinning solution containing rare-earth materials; Preferably, the rare-earth materials include any one or a combination of at least two of cerium oxide, yttrium oxide, or samarium oxide, and further preferably a combination of cerium oxide, yttrium oxide, and samarium oxide; Preferably, the rare-earth materials include by weight parts: 20-30 parts of cerium oxide, 2-4 parts of yttrium oxide, and 2-4 parts of samarium oxide; Preferably, the concentration of the rare-earth materials in the viscose spinning solution containing rare-earth materials is 25-100 g / L; Preferably, the method for preparing the viscose spinning solution containing rare-earth materials includes: mixing a rare-earth material suspension and a viscose spinning stock solution to obtain the viscose spinning solution containing rare-earth materials, and the rare-earth material suspension includes rare-earth materials; Preferably, the rare-earth material suspension further includes a dispersant; Preferably, the dispersant includes a styrene maleate dispersant; Preferably, the rare-earth material suspension further includes water and / or an alkali solution; Preferably, the concentration of the alkali solution is 0.5-1.5 mol / L; Preferably, the alkali solution includes any one or a combination of at least two of sodium hydroxide solution, potassium hydroxide solution, or ammonia water; Preferably, the rare-earth suspension includes by weight parts: 20-30 parts of cerium oxide, 2-4 parts of yttrium oxide, 2-4 parts of samarium oxide, 10-12 parts of dispersant, 60-70 parts of water, and 3-5 parts of alkali solution.

4. The knitted fabric according to any one of claims 1-3, characterized in that, The rare-earth viscose fiber is an antibacterial modified rare-earth viscose fiber; Preferably, the antibacterial agent for the antibacterial modification includes a carboxymethylated lignin nanosilver complex; Preferably, the antibacterial agent is prepared by the following method, which includes: reacting carboxymethylated lignin, a silver salt, and a reducing agent to obtain the antibacterial agent; Preferably, the silver salt, reducing agent, and carboxymethylated lignin include by weight parts: 5-8 parts of silver salt, 2-3 parts of reducing agent, and 1-2 parts of carboxymethylated lignin; Preferably, the silver salt includes any one or a combination of at least two of silver oxalate, silver acetate, or silver nitrate, and preferably silver nitrate; Preferably, the reducing agent includes any one or a combination of at least two of glucose, sodium ascorbate, or sodium citrate, and preferably sodium citrate; Preferably, the reaction time is 2-3 h, and the temperature is 80-85 °C.

5. The knitted fabric according to claim 4, characterized in that, The antibacterial modified rare-earth viscose fiber is prepared by the following method, which includes: Providing an antibacterial agent dispersion liquid, which includes a combination of the antibacterial agent and water; Coating the antibacterial agent dispersion liquid on the rare-earth viscose fiber and drying to obtain the antibacterial modified rare-earth viscose fiber; Preferably, the rare-earth viscose fiber is pretreated before the coating, and the pretreatment includes: soaking the rare-earth viscose fiber in an alcohol solvent, washing with water after soaking, and drying to obtain the pretreated rare-earth viscose fiber.

6. A method for preparing a knitted fabric according to any one of claims 1-5, characterized in that, The preparation method includes the following steps: The long-staple cotton, rare earth viscose fiber and mulberry silk are compounded and blended to obtain the knitted fabric.

7. The preparation method according to claim 6, characterized in that, The stitch density of the blending is 35-37G, preferably 36G.

8. The preparation method according to claim 6 or 7, characterized in that, The needle-emitting modes of the blending include plain weave and float stitch; Preferably, there are 2 needle-emitting modes in the blending that include float stitch; Preferably, the specific mode of the blending is that the needle-emitting of 1, 2, 3, 4, 5, 6, 7, 8, 9, 11 routes is plain weave, plain weave, plain weave, plain weave, the needle-emitting of 10 routes is plain weave, float stitch, plain weave, float stitch, and the needle-emitting of 12 routes is float stitch, plain weave, float stitch, plain weave.

9. The preparation method according to any one of claims 6 - 8, characterized in that, The woven yarn length of the blending is 100-125mm / 50 coils, preferably 105-110mm / 50 coils; Preferably, the steps of dyeing, drying and stentering are further included after the blending.

10. A kind of clothing, characterized in that, The clothing includes the knitted fabric according to any one of claims 1-5.

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