Moisture-absorbing and heat-generating wool blended knitting yarn and method for manufacturing the same

Abstract

The application provides a moisture-absorbing and heat-generating wool blended knitting yarn and a preparation method thereof, and belongs to the field of textile technology. Bamboo pulp fibers, modified polypropylene fibers, cotton fibers and modified wool fibers are sequentially subjected to the processes of grabbing, mixing, opening, feeding, rolling, carding, drawing and roving in a mass ratio of 20 / 30 / 20 / 20 to obtain the moisture-absorbing and heat-generating wool blended knitting yarn. The moisture-absorbing and heat-generating wool blended knitting yarn prepared by the application has the advantages of low cost, simple preparation method, good durability, anti-static performance, moisture absorption, sweat discharge, quick drying, antibacterial property, heat generation, warmth retention, aging resistance and the like, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a moisture-absorbing and heat-generating wool blend knitted yarn and its preparation method. Background Technology

[0002] With economic and social development, consumers are increasingly favoring warm clothing for winter. Traditional thermal fabrics achieve warmth by controlling the amount of still air, preventing heat loss from the body. These fabrics are generally thick, and their warmth retention is only average, similar to wearing multiple layers of clothing. Many existing thermal underwear fabrics are made from blends of moisture-absorbing and heat-generating fibers with ordinary fibers. For example, a new type of moisturizing and heat-retaining yarn is made by blending cupro yarn and ultra-fine anti-pilling acrylic fiber. This fabric has good moisture-absorbing and heat-generating properties, but its pilling performance is still inferior to that of pure cotton fabrics.

[0003] Generally, wool fibers have a large radius of curvature and relatively large gaps between fibers, giving them excellent softness and elasticity in fabrics. This allows them to conform well to the body, enhancing comfort. Furthermore, the air layers within wool fibers can absorb and store body heat, keeping the fabric warm. Therefore, wool blended yarns have excellent warmth retention. However, they are prone to shrinkage during washing, are not heat-resistant (washing at high temperatures can cause fabric deformation), and lack anti-static properties, making them susceptible to pilling and fuzzing, leading to discomfort. They are also easily damaged by bacteria. Therefore, wool blended fibers are used to address these issues. Summary of the Invention

[0004] The purpose of this invention is to propose a moisture-absorbing and heat-generating wool blend knitted yarn and its preparation method. It has low cost, simple preparation method, and good durability and antistatic properties. It also has the advantages of moisture absorption, perspiration wicking, quick drying, antibacterial, heat generation, warmth retention and anti-aging, and has broad application prospects.

[0005] The technical solution of this invention is implemented as follows:

[0006] This invention provides a method for preparing a moisture-absorbing and heat-generating wool blended knitted yarn. Bamboo pulp fiber, modified polypropylene fiber, cotton fiber, and modified wool fiber are processed sequentially in a mass ratio of 20 / 30 / 20 / 20, including: cotton grabbing, cotton blending, cotton opening, cotton feeding, lap forming, carding, drawing, and roving, to obtain the moisture-absorbing and heat-generating wool blended knitted yarn.

[0007] The modified polypropylene fiber is prepared by carbonizing volcanic rock microspheres with hydrogel, depositing yttrium oxide and lanthanum oxide on the surface, and then impregnating and modifying it with polydopamine-modified polypropylene fiber.

[0008] The modified wool fiber is a modified wool fiber prepared by modifying wool with polydopamine and performing a quaternary ammonium reaction on the surface.

[0009] As a further improvement of the present application, the preparation method of the modified polypropylene fiber is as follows:

[0010] S1. Preparation of chitosan solution: chitosan is dissolved in acid solution to prepare chitosan solution;

[0011] S2. Preparation of porous volcanic rock powder: the volcanic rock is ball milled to obtain a micro powder, which is added to the chitosan solution and stirred to mix uniformly, and a crosslinking agent is added to form a volcanic rock-chitosan hydrogel, which is dried, carbonized, ball milled, and prepared into porous volcanic rock powder;

[0012] S3. Far-infrared oxide deposition: yttrium nitrate and lanthanum nitrate are dissolved in water, and the porous volcanic rock powder and polyethylene glycol 4000 are added, the pH value of the solution is adjusted, and the urea solution is added dropwise, heated and stirred to react, aged, filtered, the filter cake is added to n-butanol, heated to boiling treatment, centrifuged, washed, dried, and calcined to prepare far-infrared oxide deposited porous volcanic rock powder;

[0013] S4. Modified polypropylene: Tris-HCl solution and NaOH are added to water to adjust the pH value of the solution, polypropylene fiber and dopamine hydrochloride are added, heated and stirred to react, filtered, washed, and dried to prepare modified polypropylene;

[0014] S5. Preparation of modified polypropylene fiber: the far-infrared oxide deposited porous volcanic rock powder is uniformly dispersed in water, the modified polypropylene is immersed, taken out, and dried to prepare modified polypropylene fiber.

[0015] As a further improvement of the present application, the acid solution in step S1 is 2-3wt% acetic acid or lactic acid solution, and the concentration of chitosan in the chitosan solution is 10-12wt%; in step S2, the mass ratio of the micro powder, the chitosan solution, and the crosslinking agent is 7-10:100:0.5-1, the crosslinking agent is glutaraldehyde, the carbonization temperature is 1200-1300℃, and the time is 1-2h.

[0016] As a further improvement of the present application, in step S3, the mass ratio of yttrium nitrate, lanthanum nitrate, porous volcanic rock powder, polyethylene glycol 4000, and urea is 3-5:1-2:12-15:0.2-0.4:1-2, the heating and stirring reaction temperature is 65-75℃, the time is 1-3h, the solution pH value is adjusted to 8.5-9.5, the heating to boiling treatment time is 20-40min, the calcination temperature is 550-650℃, and the time is 1-3h.

[0017] As a further improvement of the present application, the pH value of the solution is adjusted to 8.5-9.5 in step S4, the mass ratio of the polypropylene fiber and dopamine hydrochloride is 10:3-4, and the temperature of the heating and stirring reaction is 35-45℃, and the time is 1-3h.

[0018] As a further improvement of the present application, the mass ratio of the far-infrared oxide deposited porous volcanic rock powder and the modified polypropylene is 3-5:13-17 in step S5, the temperature of the impregnation is 40-50℃, and the time is 2-4h.

[0019] As a further improvement of the present application, the preparation method of the modified wool fiber is as follows:

[0020] T1. Adding Tris-HCl solution and NaOH to water to adjust the pH value of the solution, adding wool fiber and dopamine hydrochloride, heating and stirring reaction, filtering, washing, drying, and obtaining polydopamine modified wool fiber;

[0021] T2. Adding polydopamine modified wool fiber to water, adding formic acid, formaldehyde solution, heating and stirring reaction, filtering, washing, drying, adding organic solvent, adding iodomethane, stirring reaction, filtering, washing, drying, and obtaining modified wool fiber.

[0022] As a further improvement of the present application, the pH value of the solution is adjusted to 8.5-9.5 in step T1, the mass ratio of the wool fiber and dopamine hydrochloride is 10:2-3, and the temperature of the heating and stirring reaction is 40-50℃, and the time is 2-4h.

[0023] As a further improvement of the present application, the mass ratio of the polydopamine modified wool fiber, formic acid, formaldehyde solution, and iodomethane is 10:2-4:7-10:1-2 in step T2, the concentration of the formaldehyde solution is 35-40wt%, the temperature of the heating and stirring reaction is 60-70℃, the time is 12-15h, the stirring reaction time is 10-12h, and the organic solvent is selected from at least one of N,N-dimethylformamide, dichloromethane, chloroform, acetone, and acetonitrile.

[0024] The present application further protects a moisture-absorbing and heat-generating wool blended knitting yarn prepared by the above preparation method.

[0025] The present application has the following beneficial effects:

[0026] The micro powder prepared by ball milling of the volcanic rock is rich in mineral elements such as silicon, aluminum and calcium and essential elements for human health such as copper, zinc, chromium, nickel and manganese, is beneficial to human body and has certain health care function. The rich metal elements and metal compounds with complex structure can easily absorb heat energy, thus have super heat storage capacity and can also release far infrared rays beneficial to human body, so as to promote the improvement of human microcirculation. Meanwhile, the metal ions have certain effect of inhibiting the growth of bacteria, especially the zinc ion element, which can effectively inhibit bacteria and has the effect of reflecting ultraviolet rays, so that the yarn has good anti-aging performance of ultraviolet rays.

[0027] The hydroxyl group on the surface of the volcanic rock can be adsorbed by hydrogen bond with the active groups such as amino group of chitosan by adding the volcanic rock micro powder into the chitosan hydrogel, so that the volcanic rock micro powder can be uniformly dispersed in the hydrogel. After high-temperature carbonization, a three-dimensional network structure of carbon is formed to coat the volcanic rock structure, so that the volcanic rock has high specific surface area and pore, forms a gas permeation channel, and part of the water vapor on the surface of the textile fabric fiber diffuses outward from the pore, so as to accelerate the evaporation of water vapor on the surface of the textile fabric fiber, and the textile fabric fiber has the functions of moisture absorption, sweat release and quick drying.

[0028] The surface of the prepared porous volcanic rock micro powder is deposited with yttrium oxide and lanthanum oxide. Due to the unique 4f electron layer structure, the yttrium oxide and lanthanum oxide can generate far infrared rays, have the effect of self-heating, are beneficial to human health, and also have good antibacterial effect, so as to improve the durability of the wool material.

[0029] In the application, the surface of the polypropylene fiber is modified by polydopamine, and then the modified polypropylene fiber is uniformly impregnated with the far infrared oxide deposited porous volcanic rock micro powder on the surface of the modified polypropylene fiber through hydrogen bond between the oxygen on the surface of the far infrared oxide deposited porous volcanic rock micro powder and the amino group on the surface of the modified polypropylene fiber, so that the far infrared oxide deposited porous volcanic rock micro powder is uniformly impregnated on the surface of the modified polypropylene fiber, and a rough skin fiber surface is formed, the specific surface area of the fiber is increased, the heat absorption amount is increased, more static air is locked, heat convection is reduced, a heat preservation layer is formed, and the warmth retention property is enhanced, so that the prepared polypropylene fiber has the advantages of moisture absorption, sweat release, quick drying, antibacterial property, heating, warmth retention, anti-aging and the like.

[0030] In the application, the surface of the polypropylene fiber is modified by polydopamine, and then the modified polypropylene fiber is uniformly impregnated with the far infrared oxide deposited porous volcanic rock micro powder on the surface of the modified polypropylene fiber through hydrogen bond between the oxygen on the surface of the far infrared oxide deposited porous volcanic rock micro powder and the amino group on the surface of the modified polypropylene fiber, so that the far infrared oxide deposited porous volcanic rock micro powder is uniformly impregnated on the surface of the modified polypropylene fiber, and a rough skin fiber surface is formed, the specific surface area of the fiber is increased, the heat absorption amount is increased, more static air is locked, heat convection is reduced, a heat preservation layer is formed, and the warmth retention property is enhanced, so that the prepared polypropylene fiber has the advantages of moisture absorption, sweat release, quick drying, antibacterial property, heating, warmth retention, anti-aging and the like.

[0031] The moisture-absorbing and heat-generating wool blended knitting yarn prepared by the application can generate heat by itself, has a microporous structure and a strong specific surface area, can absorb more heat, and the special surface structure makes the fiber more fluffy and warm, has strong thermal resistance, can form a strong warm layer, locks the temperature of the human body, reduces the radiation of heat energy to the outside, and forms a strong warm effect.

[0032] The moisture-absorbing and heat-generating wool blended knitting yarn prepared by the application has low cost, simple preparation method, good durability, anti-static performance, moisture absorption, sweat discharge, quick drying, antibacterial, heat generation, warmth, aging resistance and the like, and has a wide application prospect. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0034] Volcanic rock, 6-9mm, specific surface area 20.5m 2 / g, purchased from Hebei Hengxun Mineral Product Processing Co., Ltd.

[0035] Preparation example 1: preparation of modified polypropylene fiber

[0036] The method is as follows:

[0037] S1. Preparation of chitosan solution: chitosan is dissolved in a 2wt% acetic acid solution to prepare a chitosan solution with a concentration of 10wt%;

[0038] S2. Preparation of porous volcanic rock powder: 7g of volcanic rock is ball milled for 2h to obtain a powder, 100g of chitosan solution is added, stirred and mixed for 10min, 0.5g of crosslinking agent glutaraldehyde is added to form a volcanic rock-chitosan hydrogel, dried, carbonized at 1200℃ for 1h, and ball milled for 2h to prepare the porous volcanic rock powder;

[0039] S3. Far-infrared oxide deposition: 3g of yttrium nitrate and 1g of lanthanum nitrate are dissolved in 200mL of water, 12g of porous volcanic rock powder and 0.2g of polyethylene glycol 4000 are added, the pH value of the solution is adjusted to 8.5, 10mL of an aqueous solution containing 1g of urea is added dropwise, heated to 65℃, stirred for 1h, aged for 5h, filtered, the filter cake is added to n-butanol, heated to boiling for 20min, centrifuged, washed, dried, and calcined at 550℃ for 1h to prepare the far-infrared oxide-deposited porous volcanic rock powder;

[0040] S4. Modified polypropylene: add Tris-HCl solution and NaOH to 200 mL water to adjust the pH of the solution to 8.5, add 10 g of polypropylene fiber and 3 g of dopamine hydrochloride, heat to 35°C, stir for 1 h, filter, wash, dry, and obtain modified polypropylene;

[0041] S5. Preparation of modified polypropylene fiber: add 3 g of far-infrared oxide deposited porous volcanic rock powder to 100 mL of water, ultrasonic dispersion for 10 min at 1000 W, add 13 g of modified polypropylene, immerse at 40°C for 2 h, take out and dry to obtain modified polypropylene fiber.

[0042] Preparation of modified polypropylene fiber

[0043] The method is as follows:

[0044] S1. Preparation of chitosan solution: dissolve chitosan in 3wt% lactic acid solution to obtain a chitosan solution with a concentration of 12wt%;

[0045] S2. Preparation of porous volcanic rock powder: ball mill 10 g of volcanic rock for 2 h to obtain a powder, add to 100 g of chitosan solution, stir and mix for 10 min, add 1 g of crosslinking agent glutaraldehyde to form a volcanic rock-chitosan hydrogel, dry, carbonize at 1300°C for 2 h, and ball mill for 2 h to obtain porous volcanic rock powder;

[0046] S3. Far-infrared oxide deposition: dissolve 5 g of yttrium nitrate and 2 g of lanthanum nitrate in 200 mL of water, add 15 g of porous volcanic rock powder and 0.4 g of polyethylene glycol 4000, adjust the pH of the solution to 9.5, add 10 mL of an aqueous solution containing 2 g of urea dropwise, heat to 75°C, stir for 3 h, age for 5 h, filter, add n-butanol to the filter cake, heat to boiling for 40 min, centrifuge, wash, dry, and calcine at 650°C for 3 h to obtain far-infrared oxide deposited porous volcanic rock powder;

[0047] S4. Modified polypropylene: add Tris-HCl solution and NaOH to 200 mL water to adjust the pH of the solution to 9.5, add 10 g of polypropylene fiber and 4 g of dopamine hydrochloride, heat to 45°C, stir for 3 h, filter, wash, dry, and obtain modified polypropylene;

[0048] S5. Preparation of modified polypropylene fiber: add 5 g of far-infrared oxide deposited porous volcanic rock powder to 100 mL of water, ultrasonic dispersion for 10 min at 1000 W, add 17 g of modified polypropylene, immerse at 50°C for 4 h, take out and dry to obtain modified polypropylene fiber.

[0049] Preparation of modified polypropylene fiber

[0050] The method is as follows:

[0051] S1. Preparation of chitosan solution: chitosan was dissolved in 2.5wt% lactic acid solution to prepare a chitosan solution with a concentration of 11wt%;

[0052] S2. Preparation of porous volcanic rock powder: 8.5g of volcanic rock was ball-milled for 2h to obtain a powder, which was added to 100g of chitosan solution and stirred and mixed for 10min, 0.7g of crosslinking agent glutaraldehyde was added to form a volcanic rock-chitosan hydrogel, which was dried, carbonized at 1250℃ for 1.5h, and ball-milled for 2h to obtain porous volcanic rock powder;

[0053] S3. Far-infrared oxide deposition: 4g of yttrium nitrate and 1.5g of lanthanum nitrate were dissolved in 200mL of water, 13.5g of porous volcanic rock powder and 0.3g of polyethylene glycol 4000 were added, the pH value of the solution was adjusted to 9, 10mL of an aqueous solution containing 1.5g of urea was added dropwise, heated to 70℃, stirred for 2h, aged for 5h, filtered, the filter cake was added to n-butanol, heated to boiling for 30min, centrifuged, washed, and dried, and calcined at 600℃ for 2h to obtain far-infrared oxide-deposited porous volcanic rock powder;

[0054] S4. Modified polypropylene: a Tris-HCl solution and NaOH were added to 200mL of water to adjust the pH value of the solution to 9, 10g of polypropylene fiber and 3.5g of dopamine hydrochloride were added, heated to 40℃, stirred for 2h, filtered, washed, and dried to obtain modified polypropylene;

[0055] S5. Preparation of modified polypropylene fiber: 4g of far-infrared oxide-deposited porous volcanic rock powder was added to 100mL of water, ultrasonically dispersed at 1000W for 10min, 15g of modified polypropylene was added, immersed at 45℃ for 3h, taken out, and dried to obtain modified polypropylene fiber.

[0056] Comparative Preparation Example 1

[0057] Compared with Preparation Example 3, the difference is that step S1 is not performed, and chitosan solution is not added in step S2.

[0058] The details are as follows:

[0059] S1. Preparation of porous volcanic rock powder: 8.5g of volcanic rock was ball-milled for 2h to obtain volcanic rock powder;

[0060] S2. Far-infrared oxide deposition: 4 g yttrium nitrate, 1.5 g lanthanum nitrate were dissolved in 200 mL water, 13.5 g volcanic rock micro powder and 0.3 g polyethylene glycol 4000 were added, the pH value of the solution was adjusted to 9, 10 mL aqueous solution containing 1.5 g urea was added dropwise, heated to 70℃, stirred for 2 h, aged for 5 h, filtered, the filter cake was added into n-butanol, heated to boiling for 30 min, centrifuged, washed, dried, calcined at 600℃ for 2 h, to obtain far-infrared oxide deposition volcanic rock micro powder;

[0061] S3. Modified polypropylene: Tris-HCl solution and NaOH were added to 200 mL water to adjust the pH value of the solution to 9, 10 g polypropylene fiber and 3.5 g dopamine hydrochloride were added, heated to 40℃, stirred for 2 h, filtered, washed, dried, to obtain modified polypropylene;

[0062] S4. Preparation of modified polypropylene fiber: 4 g far-infrared oxide deposition volcanic rock micro powder was added to 100 mL water, ultrasonic dispersion was carried out at 1000 W for 10 min, 15 g modified polypropylene was added, 45℃ dipping for 3 h, taken out, dried, to obtain modified polypropylene fiber.

[0063] Comparative Preparation Example 2

[0064] Compared with Preparation Example 3, the difference is that no yttrium nitrate is added in step S3.

[0065] Specifically as follows:

[0066] S3. Far-infrared oxide deposition: 5.5 g lanthanum nitrate was dissolved in 200 mL water, 13.5 g porous volcanic rock micro powder and 0.3 g polyethylene glycol 4000 were added, the pH value of the solution was adjusted to 9, 10 mL aqueous solution containing 1.5 g urea was added dropwise, heated to 70℃, stirred for 2 h, aged for 5 h, filtered, the filter cake was added into n-butanol, heated to boiling for 30 min, centrifuged, washed, dried, calcined at 600℃ for 2 h, to obtain far-infrared oxide deposition porous volcanic rock micro powder.

[0067] Comparative Preparation Example 3

[0068] Compared with Preparation Example 3, the difference is that no lanthanum nitrate is added in step S3.

[0069] Specifically as follows:

[0070] S3. Far-infrared oxide deposition: 5.5 g yttrium nitrate was dissolved in 200 mL water, 13.5 g porous volcanic rock micro powder and 0.3 g polyethylene glycol 4000 were added, the pH value of the solution was adjusted to 9, 10 mL aqueous solution containing 1.5 g urea was added dropwise, heated to 70°C, stirred for 2 h, aged for 5 h, filtered, the filter cake was added to n-butanol, heated to boiling for 30 min, centrifuged, washed, dried, and calcined at 600°C for 2 h to obtain far-infrared oxide deposited porous volcanic rock micro powder.

[0071] Comparative Preparation Example 4

[0072] Compared with Preparation Example 3, the difference lies in that step S3 is not performed.

[0073] Specifically as follows:

[0074] S1. Preparation of chitosan solution: chitosan was dissolved in a 2.5wt% lactic acid solution to obtain a chitosan solution with a concentration of 11wt%;

[0075] S2. Preparation of porous volcanic rock micro powder: 8.5 g volcanic rock was ball milled for 2 h to obtain micro powder, which was added to 100 g chitosan solution and stirred and mixed for 10 min, 0.7 g crosslinking agent glutaraldehyde was added to form a volcanic rock-chitosan hydrogel, which was dried and carbonized at 1250°C for 1.5 h, and then ball milled for 2 h to obtain porous volcanic rock micro powder;

[0076] S3. Modified polypropylene: a Tris-HCl solution and NaOH were added to 200 mL water to adjust the pH value of the solution to 9, 10 g polypropylene fiber and 3.5 g dopamine hydrochloride were added, heated to 40°C, stirred for 2 h, filtered, washed, and dried to obtain modified polypropylene;

[0077] S4. Preparation of modified polypropylene fiber: 4 g porous volcanic rock micro powder was added to 100 mL water, ultrasonically dispersed at 1000 W for 10 min, 15 g modified polypropylene was added, and immersed at 45°C for 3 h, then taken out and dried to obtain modified polypropylene fiber.

[0078] Comparative Preparation Example 5

[0079] Compared with Preparation Example 3, the difference lies in that step S4 is not performed.

[0080] Specifically as follows:

[0081] S1. Preparation of chitosan solution: chitosan was dissolved in a 2.5wt% lactic acid solution to obtain a chitosan solution with a concentration of 11wt%;

[0082] S2. Preparation of porous volcanic rock powder: 8.5 g of volcanic rock was ball milled for 2 h to obtain a powder, which was added to 100 g of a chitosan solution and stirred for 10 min. 0.7 g of a crosslinking agent, glutaraldehyde, was added to form a volcanic rock-chitosan hydrogel, which was dried and carbonized at 1250 °C for 1.5 h. The product was ball milled for 2 h to obtain the porous volcanic rock powder;

[0083] S3. Far-infrared oxide deposition: 4 g of yttrium nitrate and 1.5 g of lanthanum nitrate were dissolved in 200 mL of water. 13.5 g of the porous volcanic rock powder and 0.3 g of polyethylene glycol 4000 were added to the solution, and the pH value of the solution was adjusted to 9. 10 mL of an aqueous solution containing 1.5 g of urea was added dropwise, and the solution was heated to 70 °C and stirred for 2 h. The solution was aged for 5 h, and then filtered. The filter cake was added to n-butanol and heated to boiling for 30 min. The product was centrifuged, washed, and dried, and then calcined at 600 °C for 2 h to obtain the far-infrared oxide-deposited porous volcanic rock powder;

[0084] S4. Preparation of modified polypropylene fiber: 4 g of the far-infrared oxide-deposited porous volcanic rock powder was added to 100 mL of water and ultrasonically dispersed at 1000 W for 10 min. 15 g of polypropylene was added and immersed at 45 °C for 3 h. The product was taken out and dried to obtain the modified polypropylene fiber.

[0085] Preparation Example 4 Preparation of modified wool fiber

[0086] The method is as follows:

[0087] T1. Tris-HCl solution and NaOH were added to 200 mL of water to adjust the pH value of the solution to 8.5. 10 g of wool fiber and 2 g of dopamine hydrochloride were added, and the solution was heated to 40 °C and stirred for 2 h. The product was filtered, washed, and dried to obtain the polydopamine-modified wool fiber;

[0088] T2. 10 g of the polydopamine-modified wool fiber was added to 200 mL of water. 2 g of formic acid and 7 g of a 35 wt% formaldehyde solution were added, and the solution was heated to 60 °C and stirred for 12 h. The product was filtered, washed, and dried. 100 mL of N,N-dimethylformamide was added, and 1 g of iodomethane was added. The solution was stirred for 10 h, and then the product was filtered, washed, and dried to obtain the modified wool fiber.

[0089] Preparation Example 5 Preparation of modified wool fiber

[0090] The method is as follows:

[0091] T1. Tris-HCl solution and NaOH were added to 200 mL of water to adjust the pH value of the solution to 9.5. 10 g of wool fiber and 3 g of dopamine hydrochloride were added, and the solution was heated to 50 °C and stirred for 4 h. The product was filtered, washed, and dried to obtain the polydopamine-modified wool fiber;

[0092] T2. 10 g of the polydopamine modified wool fiber was added into 200 mL of water, 3 g of formic acid, 8.5 g of 37 wt% formaldehyde solution was added, heated to 65 °C, stirred for 13 h, filtered, washed, dried, added into 100 mL of N,N-dimethylformamide, 1.5 g of iodomethane was added, stirred for 11 h, filtered, washed, dried, to obtain the modified wool fiber.

[0093] Preparation of modified wool fiber

[0094] The method is as follows:

[0095] T1. A Tris-HCl solution and NaOH were added into 200 mL of water to adjust the pH value of the solution to 9, 10 g of wool fiber and 2.5 g of dopamine hydrochloride were added, heated to 45 °C, stirred for 3 h, filtered, washed, dried, to obtain the polydopamine modified wool fiber;

[0096] T2. 10 g of the polydopamine modified wool fiber was added into 200 mL of water, 3 g of formic acid, 8.5 g of 37 wt% formaldehyde solution was added, heated to 65 °C, stirred for 13 h, filtered, washed, dried, added into 100 mL of N,N-dimethylformamide, 1.5 g of iodomethane was added, stirred for 11 h, filtered, washed, dried, to obtain the modified wool fiber.

[0097] Comparative Preparation 6

[0098] Compared with Preparation 6, the difference lies in that step T1 is not performed.

[0099] The method is as follows:

[0100] 10 g of wool fiber was added into 200 mL of water, 3 g of formic acid, 8.5 g of 37 wt% formaldehyde solution was added, heated to 65 °C, stirred for 13 h, filtered, washed, dried, added into 100 mL of N,N-dimethylformamide, 1.5 g of iodomethane was added, stirred for 11 h, filtered, washed, dried, to obtain the modified wool fiber.

[0101] Comparative Preparation 7

[0102] Compared with Preparation 3, the difference lies in that step T2 is not performed.

[0103] The method is as follows:

[0104] A Tris-HCl solution and NaOH were added into 200 mL of water to adjust the pH value of the solution to 9, 10 g of wool fiber and 2.5 g of dopamine hydrochloride were added, heated to 45 °C, stirred for 3 h, filtered, washed, dried, to obtain the polydopamine modified wool fiber, which is the modified wool fiber. Example

[0105] A preparation method of a moisture-absorbing and heat-generating wool blended knitting yarn, bamboo pulp fiber, modified polypropylene fiber prepared in Preparation Example 1, cotton fiber, modified wool fiber prepared in Preparation Example 4 are sequentially subjected to a process of grabbing cotton, mixing cotton, opening cotton, giving cotton, making a roll, carding cotton, drawing, and roving in a ratio of 20 / 30 / 20 / 20 by mass to prepare a moisture-absorbing and heat-generating wool blended knitting yarn. Example

[0106] A preparation method of a moisture-absorbing and heat-generating wool blended knitting yarn, bamboo pulp fiber, modified polypropylene fiber prepared in Preparation Example 2, cotton fiber, modified wool fiber prepared in Preparation Example 5 are sequentially subjected to a process of grabbing cotton, mixing cotton, opening cotton, giving cotton, making a roll, carding cotton, drawing, and roving in a ratio of 20 / 30 / 20 / 20 by mass to prepare a moisture-absorbing and heat-generating wool blended knitting yarn. Example

[0107] A preparation method of a moisture-absorbing and heat-generating wool blended knitting yarn, bamboo pulp fiber, modified polypropylene fiber prepared in Preparation Example 3, cotton fiber, modified wool fiber prepared in Preparation Example 6 are sequentially subjected to a process of grabbing cotton, mixing cotton, opening cotton, giving cotton, making a roll, carding cotton, drawing, and roving in a ratio of 20 / 30 / 20 / 20 by mass to prepare a moisture-absorbing and heat-generating wool blended knitting yarn.

[0108] Comparative Examples 1-5

[0109] Comparative Example 3 is different from Example 3 in that the modified polypropylene fiber is prepared in Comparative Preparation Examples 1-5.

[0110] Comparative Examples 6, 7

[0111] Comparative Example 3 is different from Example 3 in that the modified wool fiber is prepared in Comparative Preparation Examples 6, 7.

[0112] Comparative Example 8

[0113] Comparative Example 3 is different from Example 3 in that the modified polypropylene fiber is replaced with polypropylene fiber of the same mass.

[0114] Comparative Example 9

[0115] Comparative Example 3 is different from Example 3 in that the modified wool fiber is replaced with wool fiber of the same mass.

[0116] Comparative Example 10

[0117] Comparative Example 3 is different from Example 3 in that the modified polypropylene fiber is replaced with polypropylene fiber of the same mass and the modified wool fiber is replaced with wool fiber of the same mass.

[0118] Test Example 1

[0119] The moisture-absorbing and heat-generating wool blended knitting yarns prepared in Examples 1-3 and Comparative Examples 1-10 were woven into fabrics by using an SGA598 type full-automatic rapier loom, and the yarn density was 350 yarns / 10 cm in warp and 320 yarns / 10 cm in weft. The results are shown in Table 1.

[0120] 1. Antibacterial property: The test was performed according to the standard of FZ / T 73023-2006 "Antibacterial Knitted Goods" Appendix D absorption method, and the bacteria for evaluation was Staphylococcus aureus.

[0121] Far infrared property: The infrared emissivity and radiance were tested according to the standard of GB / T 30127-2013 "Textiles - Determination and evaluation of far infrared properties".

[0122] Thermal property: The test was performed according to the standard of GB / T 11048-1989 "Textiles - Thermal insulation - Determination of thermal insulation".

[0123] Air permeability: The air permeability test was performed according to GB / T 5453-1997 "Textiles - Determination of air permeability of fabrics" by using a YG461E type air permeability tester. The sample area was 20 cm 2 , the pressure difference was 200 Pa, and the aperture was 50 mm, and each fabric was tested for 10 times.

[0124] Moisture permeability: The test was performed according to GB / T 12704.1-2009 "Textiles - Determination of moisture vapour transmission properties - Part 1: Water vapour resistance by the moisture method" by using a YG601-I-II type computerized fabric moisture permeability tester. The test was performed by using the moisture method, and 3 different parts of each fabric were selected, the sample diameter was 70 mm, and the test time was 1 h.

[0125] Table 1

[0126]

[0127] As shown in the above table, the fabrics woven from the moisture-absorbing and heat-generating wool blended knitting yarns prepared in Examples 1-3 have good antibacterial rate, thermal insulation and heat generation performance, and good air permeability and moisture permeability.

[0128] Test Example 2

[0129] The moisture-absorbing and heat-generating wool blended knitting yarns prepared in Examples 1-3 and Comparative Examples 1-10 were woven into fabrics by using an SGA598 type full-automatic rapier loom, and the yarn density was 350 yarns / 10 cm in warp and 320 yarns / 10 cm in weft. The results are shown in Table 2.

[0130] 1. Moisture-absorbing and heat-generating property: The test was performed according to ISO 18782 "Moisture-absorbing and heat-generating property test method" after temperature adjustment and humidity adjustment for 12 h in a temperature of 20℃ and humidity of 40% RH.

[0131] 2. Pilling resistance grade: tested according to GB / T 4802.1-2008 "Textiles - Determination of the resistance to pilling - Part 1: circular pilling behaviour".

[0132] Bursting strength: tested according to GB / T 19976-2005 "Textiles - Determination of bursting strength - Ball method".

[0133] Colour fastness to dry rubbing grade: tested according to GB / T 3920-2008 "Textiles - Colour fastness to rubbing".

[0134] Colour fastness to light and perspiration combined grade: tested according to GB / T 14576-2009 "Textiles - Colour fastness to light and perspiration combined".

[0135] Table 2

[0136]

[0137] From the above table, it can be seen that the fabric knitted from the moisture-absorbing and heat-generating wool blended knitting yarn prepared in Examples 1-3 has good moisture-absorbing and heat-generating performance and good comprehensive performance.

[0138] The above description is merely preferred embodiments of the present application, but not to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of producing a moisture-absorbing exothermic wool blend knitting yarn, characterized by, The bamboo pulp fiber, modified polypropylene fiber, cotton fiber and modified wool fiber are sequentially subjected to the processes of picking, mixing, opening, ginning, rolling, carding, drawing and roving in a mass ratio of 20 / 30 / 20 / 20 to obtain a moisture-absorbing and heat-generating wool blended knitting yarn; The modified polypropylene fiber is prepared by the following method: S1. Preparation of chitosan solution: chitosan is dissolved in acid solution to obtain chitosan solution; S2. Preparation of porous volcanic rock powder: the volcanic rock is ball milled to obtain a powder, which is mixed with chitosan solution and a crosslinking agent to form a volcanic rock-chitosan hydrogel, which is dried, carbonized, ball milled and obtained to obtain the porous volcanic rock powder; S3. Far-infrared oxide deposition: yttrium nitrate and lanthanum nitrate are dissolved in water, and the porous volcanic rock powder and polyethylene glycol 4000 are added to adjust the pH value of the solution, and then urea solution is added dropwise, heated and stirred to react, aged, filtered, the filter cake is added to n-butanol and heated to boiling treatment, centrifuged, washed, dried and calcined to obtain the far-infrared oxide deposited porous volcanic rock powder; S4. Modified polypropylene: Tris-HCl solution and NaOH are added to water to adjust the pH value of the solution, and polypropylene fiber and dopamine hydrochloride are added, heated and stirred to react, filtered, washed and dried to obtain the modified polypropylene; S5. Preparation of modified polypropylene fiber: the far-infrared oxide deposited porous volcanic rock powder is uniformly dispersed in water, and the modified polypropylene is immersed, taken out and dried to obtain the modified polypropylene fiber; The modified wool fiber is prepared by the following method: T1. Tris-HCl solution and NaOH are added to water to adjust the pH value of the solution, and wool fiber and dopamine hydrochloride are added, heated and stirred to react, filtered, washed and dried to obtain the polydopamine modified wool fiber; T2. The polydopamine modified wool fiber is added to water, formic acid and formaldehyde solution are added, heated and stirred to react, filtered, washed and dried, and then added to an organic solvent, iodomethane is added, stirred to react, filtered, washed and dried to obtain the modified wool fiber.

2. The production method according to claim 1, characterized by, In step S1, the acid solution is 2-3wt% acetic acid or lactic acid solution, and the concentration of chitosan in the chitosan solution is 10-12wt%; in step S2, the mass ratio of the powder, chitosan solution and crosslinking agent is 7-10:100:0.5-1, the crosslinking agent is glutaraldehyde, the carbonization temperature is 1200-1300℃, and the time is 1-2h.

3. The preparation method according to claim 1, characterized in that, In step S3, the mass ratio of yttrium nitrate, lanthanum nitrate, porous volcanic rock powder, polyethylene glycol 4000 and urea is 3-5:1-2:12-15:0.2-0.4:1-2, the heating and stirring reaction temperature is 65-75℃, the time is 1-3h, the solution pH value is adjusted to 8.5-9.5, the heating to boiling treatment time is 20-40min, the calcination temperature is 550-650℃, and the time is 1-3h.

4. The method of claim 1, wherein, The pH value of the solution in step S4 is adjusted to 8.5-9.5, the mass ratio of the polypropylene fiber and dopamine hydrochloride is 10:3-4, the temperature of the heating and stirring reaction is 35-45℃, and the time is 1-3h.

5. The preparation method according to claim 1, characterized in that, The mass ratio of the far-infrared oxide deposited porous volcanic rock powder and the modified polypropylene in step S5 is 3-5:13-17, the temperature of the impregnation is 40-50℃, and the time is 2-4h.

6. The method of claim 1, wherein, The pH value of the solution in step T1 is adjusted to 8.5-9.5, the mass ratio of the wool fiber and dopamine hydrochloride is 10:2-3, the temperature of the heating and stirring reaction is 40-50℃, and the time is 2-4h.

7. The preparation method according to claim 1, characterized in that, The mass ratio of the polydopamine modified wool fiber, formic acid, formaldehyde solution, iodomethane in step T2 is 10:2-4:7-10:1-2, the concentration of the formaldehyde solution is 35-40wt%, the temperature of the heating and stirring reaction is 60-70℃, the time is 12-15h, the stirring reaction time is 10-12h, and the organic solvent is at least one selected from N,N-dimethylformamide, dichloromethane, chloroform, acetone, acetonitrile. 8.A moisture-absorbing and heat-generating wool blended knitting yarn prepared by the preparation method of any one of claims 1-7.

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