Plant-based functional lyocell fibers and their preparation methods

Abstract

This application provides plant-derived functional lyocell fibers and their preparation method. The preparation method includes: S1. Adding fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol, porous nano zinc oxide, and camellia oil to ethyl acetate, stirring to obtain an oil phase; S2. Adding polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water, stirring to obtain an aqueous phase; S3. Adding the aqueous phase dropwise to the oil phase, stirring to obtain a water-in-oil emulsion; S4. Dissolving pulp in an aqueous solution of N-methyl-morpholine-N-oxide to obtain a fiber raw material solution; adding the fiber raw material solution to the water-in-oil emulsion to obtain a spinning solution; electrospinning the spinning solution to obtain plant-derived functional lyocell fibers. This application utilizes the pore structure of porous nano zinc oxide to adsorb camellia oil, and the core-shell structure of the fibers formed by the emulsion electrospinning process coats the porous nano zinc oxide adsorbed with camellia oil inside, endowing the fibers with long-lasting antibacterial effects.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a plant-based functional lyocell fiber and its preparation method. Background Technology

[0002] Lyocell fiber, as a regenerated cellulose fiber, is widely used in the modern textile and apparel industry due to its wide availability of raw materials, environmentally friendly production process, biodegradable waste, and combination of the moisture absorption and breathability of natural fibers with the strength and toughness of synthetic fibers. With the increasing demands for a healthy lifestyle, endowing lyocell fiber with antibacterial and bacteriostatic properties has become an important direction in the research and development of functional textiles.

[0003] However, traditional lyocell fibers do not have antibacterial properties, and the active ingredients added in blends are easily lost, resulting in short-lasting antibacterial effects.

[0004] To impart antibacterial properties to cellulose fibers, blending or finishing methods are typically used to introduce antibacterial active ingredients. For example, one technique involves uniformly mixing plant essential oils with hydrophobically modified nano-inorganic powders, then using a screw extruder to mix this mixture with a functional masterbatch to create a plant essential oil functional masterbatch. This masterbatch is then mixed with a lyocell spinning solution for conventional wet spinning. However, this method employs a conventional wet blending spinning process. When the spinning solution enters the aqueous coagulation bath, the plant essential oils adsorbed in the nano-inorganic powders are easily washed away and lost over a large area due to the lack of effective physical barriers, resulting in a significant reduction in the loading of active ingredients within the resulting fibers. Furthermore, since the inorganic powders and essential oils are only physically adsorbed, the essential oil molecules rapidly diffuse outwards and are lost during subsequent use, leading to extremely poor antibacterial efficacy and failing to meet the requirements for long-lasting antibacterial effects. Summary of the Invention

[0005] This application provides a plant-based functional lyocell fiber and its preparation method to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: This application provides a method for preparing plant-based functional lyocell fibers, the method comprising the following steps: S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol, porous nano zinc oxide and camellia oil to ethyl acetate, stir, and obtain the oil phase; S2. Add polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water, stir, and obtain an aqueous phase; S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve the pulp in an aqueous solution of N-methyl-morpholine-N-oxide to obtain a fiber raw material solution; The fiber raw material solution is added to the water-in-oil emulsion to obtain a spinning solution; The plant-based functional lyocell fiber is obtained by electrospinning the spinning solution.

[0007] In one embodiment of this application, in step S1, the mass ratio of the fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.3-0.5:1, preferably 0.4-0.5:1.

[0008] In one embodiment of this application, in step S1, the mass ratio of camellia oil to ethyl acetate is 1:80-120, preferably 1:80-100.

[0009] In one embodiment of this application, in step S1, the mass ratio of camellia oil to polyvinyl alcohol is 1:50-80, preferably 1:50-60.

[0010] In one embodiment of this application, in step S1, the mass ratio of camellia oil to porous nano zinc oxide is 0.2-0.3:1, preferably 0.25-0.3:1.

[0011] In one embodiment of this application, in step S1, the particle size of the porous nano zinc oxide is 50nm-80nm, preferably 50nm-70nm.

[0012] In one embodiment of this application, in step S1, the porous nano zinc oxide is modified and then added to the ethyl acetate. The modification includes: dispersing the porous nano zinc oxide in anhydrous ethanol, adding an aminosilane coupling agent, stirring under a protective gas atmosphere, centrifuging, filtering, washing, and drying.

[0013] In one embodiment of this application, in step S1, the mass ratio of the porous nano zinc oxide to anhydrous ethanol is 1-2:100, preferably 1.5-2:100.

[0014] In one embodiment of this application, in step S1, the mass ratio of the aminosilane coupling agent to the porous nano zinc oxide is 1-2:100, preferably 1.5-2:100.

[0015] In one embodiment of this application, in step S2, the mass ratio of polyvinylpyrrolidone to deionized water is 10-15:100, preferably 12-15:100.

[0016] In one embodiment of this application, in step S2, the mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.05-0.1:1, preferably 0.08-0.1:1.

[0017] In one embodiment of this application, the mass percentage of N-methyl-morpholine-N-oxide in the aqueous solution in step S4 is 40%-60%, preferably 45%-55%.

[0018] In one embodiment of this application, in step S4, the pulp includes at least one of cotton pulp, bamboo pulp, and wood pulp.

[0019] In one embodiment of this application, in step S4, the mass ratio of camellia oil to pulp is 2-5:100, preferably 3-5:100.

[0020] In one embodiment of this application, during the electrospinning process described in step S4, the voltage is 15kV-20kV, preferably 18kV-20kV; the receiving distance is 15cm-20cm, preferably 16cm-20cm; and the ambient relative humidity is 30%RH-40%RH, preferably 30%RH-35%RH.

[0021] This application also provides a plant-based functional lyocell fiber prepared according to the method described above.

[0022] The technical solution provided in this application has at least the following beneficial effects: In this application, the porous structure of nano-zinc oxide can adsorb camellia oil, while its internal pore structure allows the camellia oil to volatilize. By constructing a water-in-oil emulsion system formed from fatty alcohol polyoxyethylene ether and uniformly mixing it with a high-viscosity N-methyl-morpholine-N-oxide and cellulose solution, a core-shell structure is constructed at the fiber scale using the electric field force during electrospinning. This structure consists of a cellulose-rich aqueous phase as the outer shell and an oil phase rich in camellia oil and porous nano-zinc oxide as the inner core. The outer shell effectively acts as a physical barrier to protect the inner core, preventing the loss of active ingredients during fiber production and limiting the rapid diffusion of camellia oil during subsequent use, thus achieving slow release of camellia oil and endowing lyocell fibers with long-lasting antibacterial activity. In short, this application adsorbs camellia oil through the porous structure of porous nano zinc oxide, and encapsulates the adsorbed camellia oil-containing porous nano zinc oxide inside the fiber through the core-shell structure of the fiber formed by emulsion electrospinning process, thus endowing lyocell fiber with long-lasting antibacterial effect.

[0023] In this application, by modifying porous nano-zinc oxide, amino groups can be introduced into it. These introduced amino groups can form hydrogen bonds with the phenolic hydroxyl groups of antibacterial active ingredients such as polyphenols in camellia oil. This hydrogen bonding firmly binds the antibacterial active ingredients, such as polyphenols, within the pores of the porous nano-zinc oxide, thereby increasing the maximum loading capacity of these antibacterial active ingredients and improving the antibacterial effect. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] One embodiment of this application provides a method for preparing plant-based functional lyocell fibers, which includes the following steps: S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol, porous nano zinc oxide and camellia oil to ethyl acetate, stir, and obtain the oil phase; S2. Add polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water, stir, and obtain an aqueous phase; S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve the pulp in an aqueous solution of N-methyl-morpholine-N-oxide to obtain a fiber raw material solution; A fiber raw material solution is added to a water-in-oil emulsion to obtain a spinning solution; Plant-derived functional lyocell fibers were obtained by electrospinning the spinning solution.

[0026] In this application, the porous structure of nano-zinc oxide can adsorb camellia oil, while its internal pore structure allows the camellia oil to volatilize. By constructing a water-in-oil emulsion system formed from fatty alcohol polyoxyethylene ether and uniformly mixing it with a high-viscosity N-methyl-morpholine-N-oxide and cellulose solution, a core-shell structure is constructed at the fiber scale using the electric field force during electrospinning. This structure consists of a cellulose-rich aqueous phase as the outer shell and an oil phase rich in camellia oil and porous nano-zinc oxide as the inner core. The outer shell effectively acts as a physical barrier to protect the inner core, preventing the loss of active ingredients during fiber production and limiting the rapid diffusion of camellia oil during subsequent use, thus achieving slow release of camellia oil and endowing lyocell fibers with long-lasting antibacterial activity. In short, this application adsorbs camellia oil through the porous structure of porous nano zinc oxide, and encapsulates the adsorbed camellia oil-containing porous nano zinc oxide inside the fiber through the core-shell structure of the fiber formed by emulsion electrospinning process, thus endowing lyocell fiber with long-lasting antibacterial effect.

[0027] In one embodiment of this application, in step S1, the mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.3-0.5:1, preferably 0.4-0.5:1. The mass ratio of camellia oil to ethyl acetate is 1:80-120, preferably 1:80-100. The mass ratio of camellia oil to polyvinyl alcohol is 1:50-80, preferably 1:50-60. The mass ratio of camellia oil to porous nano-zinc oxide is 0.2-0.3:1, preferably 0.25-0.3:1. The particle size of the porous nano-zinc oxide is 50nm-80nm, preferably 50nm-70nm.

[0028] In one embodiment of this application, in step S2, the mass ratio of polyvinylpyrrolidone to deionized water is 10-15:100, preferably 12-15:100. The mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.05-0.1:1, preferably 0.08-0.1:1.

[0029] In one embodiment of this application, in step S4, the mass percentage of N-methyl-morpholine-N-oxide in the aqueous solution is 40%-60%, preferably 45%-55%. The pulp includes at least one of cotton pulp, bamboo pulp, and wood pulp. In the fiber raw material solution, the concentration of cotton pulp is 80g / L-110g / L, preferably 90g / L-110g / L. The mass ratio of camellia oil to pulp is 2-5:100, preferably 3-5:100. During electrospinning, the voltage is 15kV-20kV, preferably 18kV-20kV; the receiving distance is 15cm-20cm, preferably 16cm-20cm; and the relative humidity is 30%RH-40%RH, preferably 30%RH-35%RH.

[0030] In another embodiment of this application, in step S1, the porous nano-zinc oxide is modified and then added to ethyl acetate. The modification includes: dispersing the porous nano-zinc oxide in anhydrous ethanol, adding an aminosilane coupling agent, stirring under a protective gas atmosphere, centrifuging, filtering, washing, and drying. The protective gas can be at least one of nitrogen, argon, and helium. The mass ratio of porous nano-zinc oxide to anhydrous ethanol is 1:80-120, preferably 1:90-120. The mass ratio of the aminosilane coupling agent to the porous nano-zinc oxide is 1-2:100, preferably 1.5-2:100. Examples of aminosilane coupling agents include 3-aminopropyltriethoxysilane. During centrifugation, the rotation speed is 3000 r / min-4000 r / min, preferably 3400 r / min-5000 r / min, and the centrifugation time is 3 min-6 min, preferably 4 min-6 min. During the drying process, the temperature is 60℃-80℃, preferably 65℃-80℃; the drying time is 30min-45min, preferably 35min-45min.

[0031] In this application, by modifying porous nano-zinc oxide, amino groups can be introduced into it. These introduced amino groups can form hydrogen bonds with the phenolic hydroxyl groups of antibacterial active ingredients such as polyphenols in camellia oil. This hydrogen bonding firmly binds the antibacterial active ingredients, such as polyphenols, within the pores of the porous nano-zinc oxide, thereby increasing the maximum loading capacity of these antibacterial active ingredients and improving the antibacterial effect.

[0032] Another embodiment of this application also provides a plant-based functional lyocell fiber prepared according to the method described above.

[0033] Furthermore, the term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] Example 1 S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799, porous nano zinc oxide (particle size 60nm) and camellia oil (commercially available) to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.4:1, the mass ratio of camellia oil to ethyl acetate is 1:100, the mass ratio of camellia oil to polyvinyl alcohol 1799 is 1:60, and the mass ratio of camellia oil to porous nano zinc oxide is 0.25:1. Stir to obtain the oil phase. S2. Polyvinylpyrrolidone and nonylphenol polyoxyethylene ether are added to deionized water. The mass ratio of polyvinylpyrrolidone to deionized water is 12:100, and the mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.08:1. Stir for 2.5 h to obtain an aqueous phase. S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve cotton pulp in an aqueous solution of N-methyl-morpholine-N-oxide (the mass percentage of N-methyl-morpholine-N-oxide in the aqueous solution is 50%) to obtain a fiber raw material solution with a cotton pulp concentration of 100 g / L. A fiber raw material solution was added to the water-in-oil emulsion, with a camellia oil to pulp mass ratio of 3:100. After standing to remove bubbles, a spinning solution was obtained. Plant-derived functional lyocell fibers were obtained by electrospinning the spinning solution under conditions of 18kV voltage, 18cm receiving distance, and 35%RH relative humidity.

[0035] Example 2 S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799, porous nano zinc oxide (particle size 80nm) and camellia oil (commercially available) to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.3:1, the mass ratio of camellia oil to ethyl acetate is 1:120, the mass ratio of camellia oil to polyvinyl alcohol 1799 is 1:80, and the mass ratio of camellia oil to porous nano zinc oxide is 0.2:1. Stir to obtain the oil phase. S2. Add polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water. The mass ratio of polyvinylpyrrolidone to deionized water is 10:100, and the mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.05:1. Stir for 2 hours to obtain an aqueous phase. S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve cotton pulp in an aqueous solution of N-methyl-morpholine-N-oxide (the mass percentage of N-methyl-morpholine-N-oxide in the aqueous solution is 40%) to obtain a fiber raw material solution with a cotton pulp concentration of 110 g / L. A fiber raw material solution was added to the water-in-oil emulsion, with a camellia oil to pulp mass ratio of 2:100. After standing to remove bubbles, a spinning solution was obtained. Plant-derived functional lyocell fibers were obtained by electrospinning the spinning solution under conditions of 20kV voltage, 15cm receiving distance and 40%RH relative humidity.

[0036] Example 3 S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799, porous nano zinc oxide (particle size 50nm) and camellia oil (commercially available) to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.5:1, the mass ratio of camellia oil to ethyl acetate is 1:80, the mass ratio of camellia oil to polyvinyl alcohol 1799 is 1:50, and the mass ratio of camellia oil to porous nano zinc oxide is 0.3:1. Stir to obtain the oil phase. S2. Add polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water. The mass ratio of polyvinylpyrrolidone to deionized water is 15:100, and the mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.1:1. Stir for 3 hours to obtain an aqueous phase. S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve cotton pulp in an aqueous solution of N-methyl-morpholine-N-oxide (the aqueous solution contains 60% N-methyl-morpholine-N-oxide by mass) to obtain a fiber raw material solution with a cotton pulp concentration of 80 g / L. A fiber raw material solution was added to the water-in-oil emulsion, with a camellia oil to pulp mass ratio of 5:100. After standing to remove bubbles, a spinning solution was obtained. Plant-derived functional lyocell fibers were obtained by electrospinning the spinning solution under conditions of 15kV voltage, 20cm receiving distance and 30%RH relative humidity.

[0037] Example 4 Plant-based functional lyocell fibers were prepared in the same manner as in Example 1, except for the following conditions: S1. Porous nano-zinc oxide (particle size 60 nm) was dispersed in anhydrous ethanol at a mass ratio of 1:80. 3-aminopropyltriethoxysilane was added at a mass ratio of 1:100 to the porous nano-zinc oxide. The mixture was stirred under a nitrogen atmosphere, centrifuged at 3000 r / min for 6 min, filtered, washed, and dried at 80 °C for 30 min to obtain modified nano-zinc oxide. Fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799, modified nano zinc oxide, and camellia oil (commercially available) were added to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil was 0.4:1, the mass ratio of camellia oil to ethyl acetate was 1:100, the mass ratio of camellia oil to polyvinyl alcohol 1799 was 1:60, and the mass ratio of camellia oil to modified nano zinc oxide was 0.25:1. The mixture was stirred to obtain the oil phase.

[0038] The difference between this embodiment and Example 1 is that the porous nano zinc oxide is modified before being added to ethyl acetate.

[0039] Example 5 Plant-based functional lyocell fibers were prepared in the same manner as in Example 1, except for the following conditions: S1. Porous nano-zinc oxide (particle size 60 nm) was dispersed in anhydrous ethanol at a mass ratio of 1:120. 3-aminopropyltriethoxysilane was added at a mass ratio of 2:100 to the porous nano-zinc oxide. The mixture was stirred under a nitrogen atmosphere, centrifuged at 4000 r / min for 3 min, filtered, washed, and dried at 60 °C for 45 min to obtain modified nano-zinc oxide. Fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799, modified nano zinc oxide, and camellia oil (commercially available) were added to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil was 0.4:1, the mass ratio of camellia oil to ethyl acetate was 1:100, the mass ratio of camellia oil to polyvinyl alcohol 1799 was 1:60, and the mass ratio of camellia oil to modified nano zinc oxide was 0.25:1. The mixture was stirred to obtain the oil phase.

[0040] The difference between this embodiment and Example 1 is that the porous nano zinc oxide is modified before being added to ethyl acetate.

[0041] Comparative Example 1 Plant-based functional lyocell fibers were prepared in the same manner as in Example 1, except for the following conditions: S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol 1799 and camellia oil (commercially available) to ethyl acetate. The mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.4:1, the mass ratio of camellia oil to ethyl acetate is 1:100, and the mass ratio of camellia oil to polyvinyl alcohol 1799 is 1:60. Stir to obtain the oil phase.

[0042] The difference between this comparative example and Example 1 is that porous nano zinc oxide was not added.

[0043] Comparative Example 2 Plant-based functional lyocell fibers were prepared in the same manner as in Example 1, except for the following conditions: S4. Dissolve cotton pulp in an aqueous solution of N-methyl-morpholine-N-oxide (the mass percentage of N-methyl-morpholine-N-oxide in the aqueous solution is 50%) to obtain a fiber raw material solution with a cotton pulp concentration of 100 g / L. Camellia oil was added to the fiber raw material solution, with a mass ratio of camellia oil to pulp of 3:100. The solution was allowed to stand and degas to obtain the spinning solution. Plant-derived functional lyocell fibers were obtained by electrospinning the spinning solution under conditions of 18kV voltage, 18cm receiving distance, and 35%RH relative humidity.

[0044] The difference between this comparative example and Example 1 is that the camellia oil was not made into an emulsion and porous nano zinc oxide was not added.

[0045] test The fibers obtained in the above examples and comparative examples were processed into fabrics of the same specifications using the same process. The inhibition rates of each sample against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 11229) were tested according to GB / T 20944.3-2008 Evaluation of antimicrobial properties of textiles - Part 3: Shaking method. The results are shown in Table 1. Subsequently, each group of test samples was machine washed at room temperature for 10 minutes, spun dry at 650 r / min for 6 minutes, and then air-dried. The same process was repeated 50 times. The inhibition rate of each sample against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 11229) was then tested again using the same method. The results are shown in Table 1.

[0046] Table 1 Test Results

[0047] As shown in Table 1, the antibacterial rates of Comparative Examples 1-2 decreased significantly after washing, while the antibacterial rate of Example 1 showed no significant change. These results indicate that this application, by preparing camellia oil into an emulsion, using an emulsion electrospinning process to prepare fibers, and adding porous nano-zinc oxide during the emulsion preparation process, can impart a long-lasting antibacterial effect to lyocell fibers.

[0048] As shown in Table 1, compared with Example 1, the antibacterial rate of the plant-based functional lyocell fibers prepared in Examples 4 and 5 was significantly improved in terms of the samples before washing. This result indicates that the present application can further improve the antibacterial effect by modifying porous nano-zinc oxide.

[0049] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for producing a plant functional lyocell fiber, characterized by, The preparation method of the plant-based functional lyocell fiber includes the following steps: S1. Add fatty alcohol polyoxyethylene ether-7, polyvinyl alcohol, porous nano zinc oxide and camellia oil to ethyl acetate, stir, and obtain the oil phase; S2. Add polyvinylpyrrolidone and nonylphenol polyoxyethylene ether to deionized water, stir, and obtain an aqueous phase; S3. Add the aqueous phase dropwise to the oil phase and stir to obtain a water-in-oil emulsion; S4. Dissolve the pulp in an aqueous solution of N-methyl-morpholine-N-oxide to obtain a fiber raw material solution; The fiber raw material solution is added to the water-in-oil emulsion to obtain a spinning solution; The plant-based functional lyocell fiber is obtained by electrospinning the spinning solution.

2. The method for producing a plant functional lyocell fiber according to claim 1, characterized by, In step S1, the mass ratio of fatty alcohol polyoxyethylene ether-7 to camellia oil is 0.3-0.5:1; And / or, in step S1, the mass ratio of camellia oil to ethyl acetate is 1:80-120.

3. The method for preparing plant functional lyocell fiber according to claim 1, characterized by, In step S1, the mass ratio of camellia oil to polyvinyl alcohol is 1:50-80; And / or, in step S1, the mass ratio of camellia oil to porous nano zinc oxide is 0.2-0.3:

1.

4. The method for producing a plant functional lyocell fiber according to claim 1 or 3, characterized by, In step S1, the porous nano zinc oxide has a particle size of 50nm-80nm.

5. The method for preparing plant-based functional lyocell fiber as described in claim 1, characterized in that, In step S1, the porous nano zinc oxide is modified and then added to the ethyl acetate. The modification includes: dispersing the porous nano zinc oxide in anhydrous ethanol, adding an aminosilane coupling agent, stirring under a protective gas atmosphere, centrifuging, filtering, washing, and drying.

6. The method for producing plant functional lyocell fibers according to claim 5, characterized by, In step S1, the mass ratio of the porous nano zinc oxide to anhydrous ethanol is 1-2:100; And / or, in step S1, the mass ratio of the aminosilane coupling agent to the porous nano zinc oxide is 1-2:

100.

7. The method for preparing plant-based functional lyocell fiber as described in claim 1, characterized in that, In step S2, the mass ratio of polyvinylpyrrolidone to deionized water is 10-15:100; And / or, in step S2, the mass ratio of nonylphenol polyoxyethylene ether to polyvinylpyrrolidone is 0.05-0.1:

1.

8. The method for preparing plant-based functional lyocell fiber as described in claim 1, characterized in that, In the aqueous solution described in step S4, the mass percentage of N-methyl-morpholine-N-oxide is 40%-60%. And / or, in step S4, the pulp includes at least one of cotton pulp, bamboo pulp, and wood pulp.

9. The method for producing a plant functional lyocell fiber according to claim 1 or 8, characterized by, In step S4, the mass ratio of camellia oil to pulp is 2-5:100; And / or, in the electrospinning process described in step S4, the voltage is 15kV-20kV, the receiving distance is 15cm-20cm, and the relative humidity of the environment is 30%RH-40%RH.

10. A plant-based functional lyocell fiber prepared according to any one of claims 1-9.

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