Moisture-absorbing infrared light-absorbing composite heating modified wool fiber and preparation method and application thereof

Abstract

The application belongs to the technical field of fibers, and particularly relates to a moisture-absorbing infrared light-absorbing composite heating modified wool fiber and a preparation method and application thereof. The moisture-absorbing infrared light-absorbing composite heating modified wool fiber is prepared by modifying amino-containing lignin-containing cellulose nanocrystals and guar gum on amino-modified wool fiber and then loading modified nanotourmaline powder. The modified nanotourmaline powder is prepared by reacting maleic anhydride, amino-dodecamethylene glycol-carboxylic acid and amino-modified nanotourmaline powder. The fabric prepared from the moisture-absorbing infrared light-absorbing composite heating modified wool fiber provided by the application has moisture absorption and infrared light absorption and heating at the same time, and has excellent durability.

Description

Technical Field

[0001] This invention belongs to the field of fiber technology, specifically relating to a moisture-absorbing, infrared-absorbing, light-absorbing, composite heat-generating modified wool fiber, its preparation method, and its application. Background Technology

[0002] Traditional winter clothing primarily relies on blocking heat loss to maintain warmth, but it suffers from being bulky and heavy. As people's demands for aesthetics and comfort continue to rise, lightweight fabrics that can actively generate heat and retain warmth for extended periods are becoming increasingly popular, which has also driven the research and development of heat-generating fibers.

[0003] Wool fiber is widely favored in the high-end textile market for its ultra-fine, soft, skin-friendly, and natural warmth-retaining properties. However, it has low strength, is prone to pilling, and has limited heat-generating effect. Existing technologies often address this by combining it with other fibers and subjecting it to modification treatment. For example, Chinese patent CN 118563470 B discloses a moisture-absorbing and heat-generating wool blended knitted yarn and its preparation method. The preparation method involves mixing bamboo pulp fiber, modified polypropylene fiber, cotton fiber, and modified wool fiber in a mass ratio of 20 / 30 / 20 / 20, and then sequentially processing them as follows: cotton handling, blending, opening, feeding, lap forming, carding, drawing, and roving to obtain the moisture-absorbing and heat-generating wool blended knitted yarn. This technical solution modifies the surface of polypropylene fiber with polydopamine, giving it abundant amino groups. These amino groups can form hydrogen bonds with oxygen on the surface of far-infrared oxide-deposited porous volcanic rock powder, allowing the far-infrared oxide-deposited porous volcanic rock powder to be uniformly impregnated and fixed on the surface of the modified polypropylene fiber. This results in polypropylene fiber with good advantages such as moisture absorption, perspiration wicking, quick drying, antibacterial properties, heat generation, warmth retention, and anti-aging properties. However, the far-infrared irradiation temperature rise and moisture absorption heat generation temperature rise of this technical solution need to be improved, and the heat retention rate is relatively low.

[0004] Chinese patent CN 119900171 B discloses a heat-generating and heat-insulating nano-aerogel fiber and its preparation method, comprising the following components: composite aerogel, modified wool fiber, and phase change material. While this technical solution claims that adding boride can absorb infrared radiation and convert it into heat energy, thereby improving the fiber's heating efficiency; and that boride can also enhance the fiber's own infrared emission capability, allowing it to better dissipate heat as infrared radiation when the fiber temperature rises, maintaining a warm surrounding environment, it only tested its heat-insulating performance and did not test its heating effect; therefore, its heating effect is unknown.

[0005] In addition, by adding far-infrared heating materials or moisture-absorbing heating agents to fibers, theoretically, the former can absorb external infrared radiation energy, and the latter can capture water molecules in the air, thereby achieving heating. However, in actual use, these two types of materials often have limited durability due to their weak bonding force with fibers, and their heating and heat preservation performance will significantly decrease with the number of washes. Summary of the Invention

[0006] The purpose of this invention is to provide a moisture-absorbing, infrared-absorbing, light-absorbing, composite heat-generating modified wool fiber, its preparation method, and its application, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The first aspect of the present invention provides a moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber, wherein the moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber is prepared by modifying aminated wool fiber with aminated lignin-containing cellulose nanocrystals and guar gum, and then loading modified nano-tourmaline powder. The modified nano-tourmaline powder is prepared by reacting maleic anhydride, amino-dodecyl polyethylene glycol-carboxylic acid, and aminated nano-tourmaline powder.

[0008] As a further improvement of the present invention, the preparation method of the aminated lignin-containing cellulose nanocrystals is as follows: lignin-containing cellulose nanocrystals are added to ethanol, ultrasonically dispersed, aminosilane A is added, the pH is adjusted to 5-6, heated and stirred, centrifuged, and dried to obtain the product.

[0009] As a further improvement of the present invention, the lignin-containing cellulose nanocrystals have a diameter of 10-30 nm and a length of 200-500 nm.

[0010] Lignin-containing cellulose nanocrystals are rod- or needle-shaped crystals with nanoscale structure extracted from lignocellulose raw materials. They contain lignin and cellulose. Cellulose contains a large number of hydroxyl groups, which have good hygroscopic properties. Lignin has far-infrared light absorption properties and can convert far-infrared light into heat energy. Guar gum is a natural polysaccharide with good hygroscopic properties. This invention utilizes genipin to achieve crosslinking between aminated lignin-containing cellulose nanocrystals and aminated wool fibers. At the same time, guar gum participates in the network through hydrogen bonding or physical entanglement, thereby forming a three-dimensional porous structure with good stability. This effectively improves the heat generation performance and washability of wool fibers, while also effectively improving their heat retention performance.

[0011] As a further improvement of the present invention, the heating and stirring temperature is 70-80℃ and the time is 3-6h.

[0012] As a further improvement of the present invention, the mass ratio of the lignin-containing cellulose nanocrystals, ethanol and aminosilane A is 1:10-20:0.2-0.4.

[0013] As a further improvement of the present invention, the preparation method of the amino-modified wool fiber is as follows: the wool fiber is completely immersed in an aminosilane B solution, the pH is adjusted to 5-6, and the fiber is dried after immersion.

[0014] As a further improvement of the present invention, the aminosilane B solution is obtained by mixing aminosilane B and ethanol in a mass ratio of 6-10:100.

[0015] As a further improvement of the present invention, the soaking temperature is 30-40℃ and the soaking time is 6-10h.

[0016] As a further improvement of the present invention, the wool fibers are 16.5-20 mm in diameter and have been treated to remove impurities such as grease and dust. μ m Merino fine wool fiber.

[0017] As a further improvement of the present invention, the preparation method of the aminated nano-tourmaline powder is as follows: nano-tourmaline powder is added to ethanol, ultrasonically dispersed, aminosilane C is added, the pH is adjusted to 5-6, heated and stirred, centrifuged, and dried to obtain the product.

[0018] As a further improvement of the present invention, the particle size of the nano-tourmaline powder is 30-100 nm.

[0019] As a further improvement of the present invention, the heating and stirring temperature is 70-80℃ and the time is 3-6h.

[0020] As a further improvement of the present invention, the mass ratio of the nano-tourmaline powder, ethanol and aminosilane C is 1:10-20:0.2-0.4.

[0021] As a further improvement of the present invention, the aminosilane A, aminosilane B and aminosilane C are each independently selected from at least one of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane and N-(β-aminoethyl)-γ-aminopropylmethyldiethoxysilane.

[0022] As a further improvement of the present invention, the modified nano-tourmaline powder is prepared by mixing aminated nano-tourmaline powder, amino-dodecyl polyethylene glycol-carboxylic acid and DMF (N,N-dimethylformamide) aqueous solution, adding maleic anhydride, stirring and reacting, and after the reaction is completed, filtering, washing and drying to obtain the product.

[0023] As a further improvement of the present invention, the mass ratio of the aminated nano-tourmaline powder, amino-dodecyl polyethylene glycol-carboxylic acid, maleic anhydride and DMF aqueous solution is 6-8:2-4:1:150-300.

[0024] Nano-tourmaline powder is a borosilicate mineral with a cyclic structure containing boron, aluminum, iron, sodium, magnesium, and lithium. It has a high far-infrared emissivity. However, directly loading it onto the surface of wool fibers modified with lignin cellulose nanocrystals and guar gum results in poor loading effect, leading to poor infrared light absorption and heat dissipation performance and durability of the wool fibers. This invention creatively modifies it with amino-dodecyl polyethylene glycol-carboxylic acid and maleic anhydride. By utilizing the reaction between the anhydride group of maleic anhydride and the amino group, amino-dodecyl polyethylene glycol-carboxylic acid and aminated nano-tourmaline powder are organically combined. Amino-dodecyl polyethylene glycol-carboxylic acid not only effectively improves the moisture absorption and heat dissipation performance of wool fibers, but its flexible long chain and unreacted carboxyl groups also improve the uniform dispersion and binding performance of nano-tourmaline powder on the surface of wool fibers, increasing the specific surface area of ​​wool fibers. This not only improves the infrared light absorption and heat dissipation performance and durability of wool fibers, but also enhances their heat insulation performance.

[0025] As a further improvement of the present invention, the mass concentration of the DMF aqueous solution is 70-80%.

[0026] As a further improvement of the present invention, the temperature of the stirring reaction is 40-45°C and the time is 6-10h.

[0027] A second aspect of this invention provides a method for preparing moisture-absorbing, infrared-absorbing, and heat-generating modified wool fibers, comprising the following steps: S1. Mix aminated lignin-containing cellulose nanocrystals, guar gum, and deionized water, add genipin and mix evenly to obtain a modified solution; coat the modified solution evenly on the surface of aminated wool fibers and dry to obtain a modified wool fiber intermediate product. S2. Mix modified nano-tourmaline powder and deionized water, impregnate the modified wool fiber intermediate product, and remove and dry it after impregnation.

[0028] As a further improvement of the present invention, the mass ratio of the aminated lignin-cellulose nanocrystals, guar gum, genipin and deionized water is 1:1.5-2:0.03-0.08:80-100.

[0029] As a further improvement of the present invention, the mass ratio of the modified solution to the aminated wool fiber is 15-20:1.

[0030] As a further improvement of the present invention, the drying temperature is 37-45°C and the time is 5-8 hours.

[0031] As a further improvement of the present invention, the mass ratio of the modified nano-tourmaline powder, deionized water and modified wool fiber intermediate is 1:25-35:3-5.

[0032] As a further improvement of the present invention, the impregnation temperature is 40-50°C and the time is 3-5 hours.

[0033] The third aspect of this invention provides the application of moisture-absorbing, infrared-absorbing, and heat-generating modified wool fibers in the preparation of heat-generating fabrics.

[0034] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows: 1. This invention utilizes genipin to achieve crosslinking of aminated lignin-containing cellulose nanocrystals and aminated wool fibers. At the same time, guar gum participates in the network through hydrogen bonding or physical entanglement, thereby forming a three-dimensional porous structure with good stability. This effectively improves the heat generation performance and water resistance of wool fibers, while also effectively improving their heat retention performance.

[0035] 2. This invention creatively modifies the wool fiber with amino-dodecyl polyethylene glycol-carboxylic acid and maleic anhydride. By utilizing the reaction between the anhydride group of maleic anhydride and the amino group, amino-dodecyl polyethylene glycol-carboxylic acid and aminated nano-tourmaline powder are organically combined. Amino-dodecyl polyethylene glycol-carboxylic acid can not only effectively improve the moisture absorption and heat generation performance of wool fiber, but also its flexible long chain and unreacted carboxyl groups improve the uniform dispersion and binding performance of nano-tourmaline powder on the surface of wool fiber, increase the specific surface area of ​​wool fiber, and improve the heat preservation performance while improving the infrared light absorption and heat generation performance and durability of wool fiber. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Preparation of Aminated Lignin-Containing Cellulose Nanocrystals The lignin-cellulose nanocrystals were added to ethanol, ultrasonically dispersed, and then γ-aminopropyltriethoxysilane was added to adjust the pH to 5. The mixture was heated and stirred at 80°C for 6 hours, centrifuged, and dried to obtain the final product.

[0038] The lignin-cellulose nanocrystals have a diameter of 10-30 nm and a length of 200-500 nm. (Jiangsu Xianfeng Nanomaterials Technology Co., Ltd.)

[0039] The mass ratio of the lignin-cellulose nanocrystals, ethanol, and γ-aminopropyltriethoxysilane is 1:15:0.3.

[0040] Example 2: Preparation of Aminated Wool Fibers The wool fibers are completely immersed in a γ-aminopropyltriethoxysilane solution, the pH is adjusted to 5, and the solution is soaked at 40°C for 8 hours. After soaking, the fibers are dried to obtain the final product.

[0041] The γ-aminopropyltriethoxysilane solution was obtained by mixing γ-aminopropyltriethoxysilane and ethanol in a mass ratio of 8:100.

[0042] The wool fibers are 16.5 mm in diameter and have been treated to remove grease, dust, and other impurities. μ m Merino fine wool fiber.

[0043] Example 3: Preparation of Aminated Nano-Tourmaline Powder Nano tourmaline powder was added to ethanol, ultrasonically dispersed, γ-aminopropyltriethoxysilane was added, the pH was adjusted to 5, heated and stirred at 80℃ for 5 hours, centrifuged, and dried to obtain the final product.

[0044] The nano-tourmaline powder has a particle size of 50nm and is produced by Zhejiang Zhitai Nano-Micro New Materials Co., Ltd.

[0045] The mass ratio of the nano-tourmaline powder, ethanol, and γ-aminopropyltriethoxysilane is 1:15:0.3.

[0046] Example 4: Preparation of modified nano-tourmaline powder A Aminated nano-tourmaline powder, amino-dodecyl polyethylene glycol-carboxylic acid, and DMF aqueous solution were mixed, maleic anhydride was added, and the mixture was stirred at 45°C for 6 hours. After the reaction was completed, the mixture was filtered, washed, and dried to obtain the final product.

[0047] The mass ratio of the aminated nano-tourmaline powder, amino-dodecyl polyethylene glycol-carboxylic acid, maleic anhydride, and DMF aqueous solution (mass concentration of 75%) is 6:3:1:200.

[0048] Example 5: Preparation of modified nano-tourmaline powder B Aminated nano-tourmaline powder, carboxymethyl chitosan, and DMF aqueous solution were mixed, maleic anhydride was added, and the mixture was stirred at 45°C for 6 hours. After the reaction was completed, the mixture was filtered, washed, and dried to obtain the final product.

[0049] The mass ratio of the aminated nano-tourmaline powder, carboxymethyl chitosan, maleic anhydride, and DMF aqueous solution (mass concentration of 75%) is 6:3:1:200.

[0050] Example 6: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fiber S1. Mix aminated lignin-containing cellulose nanocrystals, guar gum and deionized water, add genipin and mix evenly to obtain a modified solution; coat the modified solution evenly on the surface of aminated wool fibers and dry at 40°C for 6 hours to obtain a modified wool fiber intermediate product. The mass ratio of the aminated lignin-cellulose nanocrystals, guar gum, genipin, and deionized water is 1:1.8:0.05:80.

[0051] The mass ratio of the modified solution to the aminated wool fiber is 16:1.

[0052] S2. Mix modified nano-tourmaline powder A with deionized water, impregnate the modified wool fiber intermediate product at 50°C for 4 hours, and remove and dry after impregnation to obtain the final product.

[0053] The mass ratio of the modified nano-tourmaline powder A, deionized water, and modified wool fiber intermediate is 1:30:5.

[0054] Comparative Example 1: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers Aminated lignin-containing cellulose nanocrystals, guar gum, and deionized water were mixed, and genipin was added and mixed evenly to obtain a modified solution. The modified solution was then evenly coated onto the surface of aminated wool fibers and dried at 40°C for 6 hours to obtain the final product.

[0055] The mass ratio of the aminated lignin-cellulose nanocrystals, guar gum, genipin, and deionized water is 1:1.8:0.05:80.

[0056] The mass ratio of the modified solution to the aminated wool fiber is 16:1.

[0057] Comparative Example 2: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers Modified nano-tourmaline powder and deionized water are mixed and impregnated with modified wool fibers at 50°C for 4 hours. After impregnation, the fibers are removed and dried to obtain the final product.

[0058] The mass ratio of the modified nano-tourmaline powder, deionized water, and modified wool fiber is 1:30:5.

[0059] Comparative Example 3: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers The difference between this comparative example and Example 6 is that guar gum was replaced with an equal mass of chitosan; all other aspects are the same.

[0060] Comparative Example 4: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers The difference between this comparative example and Example 6 is that guar gum is replaced with an equal mass of sodium alginate; all other aspects are the same.

[0061] Comparative Example 5: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers The difference between this comparative example and Example 6 is that the aminated lignin-containing cellulose nanocrystals are replaced with aminated lignin; all other aspects are the same. The preparation method of the aminated lignin is different from that of Example 1 only in that the lignin-containing cellulose nanocrystals are replaced with an equal mass of lignin.

[0062] Comparative Example 6: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers The difference between this comparative example and Example 6 is that modified nano-tourmaline powder A is replaced with modified nano-tourmaline powder B; all other aspects are the same.

[0063] Comparative Example 7: Preparation of hygroscopic infrared light-absorbing composite heat-generating modified wool fibers The difference between this comparative example and Example 6 is that the modified nano-tourmaline powder A is replaced with aminated nano-tourmaline powder; all other aspects are the same.

[0064] Performance Testing: Wool blended yarns were obtained by conventional spinning processes using wool fibers and nylon fibers from Examples 6 and Comparative Examples 1-7 at a mass ratio of 65:35. Fabrics were spun from these wool blended yarns, with a warp density of 35 threads / cm and a weft density of 32 threads / cm. The following performance tests were conducted on the fabrics: 1. Moisture absorption and heat generation performance: The moisture absorption and heat generation performance of textiles was tested according to GB / T 29866-2013 "Test Method for Moisture Absorption and Heat Generation Performance of Textiles" after 0 and 50 washes. 2. Far-infrared performance: The far-infrared performance of textiles was tested according to GB / T 30127-2013 "Test and evaluation of far-infrared performance of textiles" after 0 and 50 washes. 3. Thermal insulation performance: The thermal insulation performance was tested according to GB / T 11048-1989 "Test Method for Thermal Insulation Performance of Textiles" Method A, plate type, for 0 and 50 washes.

[0065] The performance test results are shown in Table 1 below.

[0066] Table 1 Performance Test Results

[0067] As can be seen from Table 1, compared with Example 6, the moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber of Comparative Example 1 did not have modified nano-tourmaline powder loaded. The fabric prepared did not have far-infrared properties, and its moisture-absorbing heat-generating properties, heat-insulating properties and water-washing resistance were also reduced. This shows that the loaded modified nano-tourmaline powder can not only improve the far-infrared properties of the fabric, but also improve the moisture-absorbing heat-generating properties, heat-insulating properties and water-washing resistance of the fabric. Comparative Example 2: The moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber was not modified with aminated lignin-containing cellulose nanocrystals and guar gum. The fabric prepared with these modified wool fibers showed significantly improved moisture absorption and heat generation properties, heat retention properties, and washability. This indicates that modifying wool fibers with aminated lignin-containing cellulose nanocrystals and guar gum can significantly improve the moisture absorption and heat generation properties, heat retention properties, and washability of the fabric. Comparative Examples 1-2 show that the hygroscopic infrared light-absorbing composite heat-generating modified wool fiber is first modified by aminated lignin-containing cellulose nanocrystals and guar gum, and then loaded with modified tourmaline powder. The two have a synergistic effect.

[0068] In Comparative Example 3, the hygroscopic infrared light-absorbing composite heat-generating modified wool fiber had guar gum replaced with an equal mass of chitosan; in Comparative Example 4, the hygroscopic infrared light-absorbing composite heat-generating modified wool fiber had guar gum replaced with an equal mass of sodium alginate; and in Comparative Example 5, the hygroscopic infrared light-absorbing composite heat-generating modified wool fiber had aminated lignin-containing cellulose nanocrystals replaced with aminated lignin. The hygroscopic heat-generating properties of the fabrics in Comparative Examples 3-5 decreased to varying degrees, while their washability and heat retention properties also decreased significantly. Comparative Examples 3-5 demonstrate that modifying wool fibers with aminated lignin-containing cellulose nanocrystals and guar gum has unexpected technical effects that cannot be replaced by conventional methods.

[0069] In Comparative Example 6, the modified nano-tourmaline powder A was replaced with modified nano-tourmaline powder B in the moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber; in Comparative Example 7, the modified nano-tourmaline powder A was replaced with aminated nano-tourmaline powder. The moisture-absorbing and heat-generating properties of the fabrics in Comparative Examples 6 and 7 decreased to varying degrees, while their far-infrared performance, washability, and heat retention performance also decreased significantly. Comparative Examples 6-7 show that modifying nano-tourmaline powder with amino-dodecyl polyethylene glycol-carboxylic acid has unexpected technical effects and cannot be replaced by conventional methods.

[0070] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber, characterized in that, The moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber is prepared by modifying aminated wool fiber with aminated lignin-cellulose nanocrystals and guar gum, and then loading modified nano-tourmaline powder. The modified nano-tourmaline powder is prepared by reacting maleic anhydride, amino-dodecyl polyethylene glycol-carboxylic acid, and aminated nano-tourmaline powder.

2. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 1, characterized in that, The preparation method of the aminated lignin-containing cellulose nanocrystals is as follows: add lignin-containing cellulose nanocrystals to ethanol, disperse by ultrasonication, add aminosilane A, adjust the pH to 5-6, heat and stir, centrifuge, and dry to obtain the product.

3. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 2, characterized in that, The preparation method of the aminated wool fiber is as follows: the wool fiber is completely immersed in an aminosilane B solution, the pH is adjusted to 5-6, and the fiber is dried after immersion.

4. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 3, characterized in that, The preparation method of the aminated nano-tourmaline powder is as follows: add nano-tourmaline powder to ethanol, disperse it by ultrasonication, add aminosilane C, adjust the pH to 5-6, heat and stir, centrifuge, and dry to obtain the product.

5. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to any one of claims 1-4, characterized in that, The lignin-containing cellulose nanocrystals have a diameter of 10-30 nm and a length of 200-500 nm; the wool fibers, after being treated to remove grease, dust, and other impurities, have a diameter of 16.5-20 nm. μ The nano-tourmaline powder has a particle size of 30-100 nm and is composed of fine Merino wool fibers.

6. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 5, characterized in that, The aminosilane A, aminosilane B, and aminosilane C are each independently selected from at least one of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, and N-(β-aminoethyl)-γ-aminopropylmethyldiethoxysilane.

7. The moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 6, characterized in that, The modified nano-tourmaline powder is prepared by mixing aminated nano-tourmaline powder, amino-dodecyl polyethylene glycol-carboxylic acid and DMF aqueous solution, adding maleic anhydride, stirring and reacting, filtering, washing and drying after the reaction is completed.

8. The method for preparing the moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Mix aminated lignin-containing cellulose nanocrystals, guar gum, and deionized water, add genipin and mix evenly to obtain a modified solution; coat the modified solution evenly on the surface of aminated wool fibers and dry to obtain a modified wool fiber intermediate product. S2. Mix modified nano-tourmaline powder and deionized water, impregnate the modified wool fiber intermediate product, and remove and dry it after impregnation.

9. The method for preparing moisture-absorbing, infrared-absorbing, and heat-generating modified wool fiber according to claim 8, characterized in that, The mass ratio of the aminated lignin-cellulose nanocrystals, guar gum, genipin, and deionized water is 1:1.5-2:0.03-0.08:80-100; the mass ratio of the modified solution to the aminated wool fiber is 15-20:1; and the mass ratio of the modified nano-tourmaline powder, deionized water, and the modified wool fiber intermediate is 1:25-35:3-5.

10. The application of the moisture-absorbing infrared light-absorbing composite heat-generating modified wool fiber according to any one of claims 1-7 in the preparation of heat-generating fabrics.

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