Artemisia argyi fiber and polyurethane mixed insole material and application thereof

Abstract

The invention relates to the field of insole materials, in particular to a wormwood fiber and polyurethane mixed insole material and application of the wormwood fiber and polyurethane mixed insole material. Comprising the following components: 38 to 54 parts of diisocyanate, 74 to 115 parts of polyether polyol, 7 to 21 parts of modified wormwood fiber, 0.7 to 1.4 parts of a catalyst, 1.2 to 3.4 parts of a chain extension enhancer, 1.3 to 2.6 parts of a foaming agent and 0.6 to 1.2 parts of a foam stabilizer. The invention discloses an insole material. The insole material is prepared by synthesizing a polyurethane material in which wormwood fiber participates. The insole material prepared by the invention not only can maintain higher elasticity and strength, but also can have long-term antibacterial activity.

Description

Technical Field

[0001] The invention relates to the field of insole materials, and in particular to a mixed insole material of wormwood fiber and polyurethane and application thereof. Background Art

[0002] The sole of a person's foot can be roughly divided into three parts: the forefoot, the foot socket and the heel. When a person is standing still or running at a constant speed, the stress on the sole of the foot is uneven and the pressure on the sole of the foot is inconsistent, so it is more important to improve the fit between the insole and the sole of the foot. The insoles of traditional sports shoes are usually made of foam materials with cushioning properties. The foam materials are mostly polyurethane or EVA foam materials. These materials have certain elasticity and cushioning properties, which play a role in cushioning the foot during exercise. However, the insoles made of these foam materials have poor durability and resilience and no good tear resistance, which affects the wearing effect. At the same time, the lack of antibacterial and deodorizing properties also greatly reduces the comfort of wearing.

[0003] Polyurethane material is prepared by reacting polyols containing alcohol hydroxyl groups and isocyanates. The prepared insole material is relatively light, has good elasticity and resilience, good comfort, can provide good support for the foot, reduce pressure and friction on the foot, help prevent foot fatigue and bone diseases, etc., and also has good warmth retention performance, suitable for use in colder environments such as winter. However, in the preparation process of polyurethane insole materials, in order to improve its elastic support, more soft foam silicone oil is often added, resulting in a decrease in its mechanical strength. In addition, the antibacterial performance of polyurethane materials is poor, and during wearing and use, more serious odor and mildew problems often occur. Based on this, the polyurethane insole process has been improved on the market, such as adding some plant fiber materials in the preparation process of polyurethane materials to enhance its strength and antibacterial properties, but the effect often cannot meet the requirements. Therefore, it is extremely important to develop a polyurethane insole material that can have excellent strength and elasticity and good antibacterial properties. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a mixed insole material of wormwood fiber and polyurethane and application thereof.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] In a first aspect, the present invention provides a mixed insole material of wormwood fiber and polyurethane, which comprises the following components calculated by weight:

[0007] 38-54 parts of diisocyanate, 74-115 parts of polyether polyol, 7-21 parts of modified wormwood fiber, 0.7-1.4 parts of catalyst, 1.2-3.4 parts of chain extender, 1.3-2.6 parts of foaming agent and 0.6-1.2 parts of foam stabilizer.

[0008] Preferably, the diisocyanate is at least one of 4,4'-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and xylylene diisocyanate (XDI).

[0009] Preferably, the polyether polyol is polytetramethylene glycol PTMEG-2000 or polyoxypropylene glycol PPG-2000.

[0010] Preferably, the catalyst is at least one of stannous octoate, dibutyltin diacetate, dibutyltin dilaurate, and di-n-octyltin dilaurate.

[0011] Preferably, the foaming agent is pure water.

[0012] Preferably, the foam stabilizer is polyurethane soft foam silicone oil, and the models include at least one of Maitu L-580, Maitu L-5702, and Maitu L-5333; more preferably, Maitu L-5333.

[0013] Preferably, the preparation method of the modified wormwood fiber comprises:

[0014] S1. Mix an aqueous solution of sodium hydroxide and ethanol, stir until dissolved evenly, then add wormwood fiber, soak at room temperature for 2-4 hours, then filter to remove the liquid, wash with pure water until the washing liquid is neutral, and then place in a vacuum box to dry to obtain activated wormwood fiber;

[0015] S2, the activated wormwood fiber and the aqueous solution of ethanol are mixed, stirred and dispersed evenly, and then the coupling agent KH-560 is added, and condensed and refluxed at 50-60 ° C for 4-10 hours. After the treatment, the liquid is filtered out, washed with pure water at least 3 times, and placed in a vacuum box to dry to obtain epoxy wormwood fiber;

[0016] S3. Weigh p-aminobenzenesulfonamide and anhydrous ethanol, mix them, heat to 60-70°C, stir until they are completely dissolved, then add the epoxylated wormwood fiber, stir under reflux conditions for 3-8 hours. After the treatment, wash with hot ethanol at least 3 times, and dry in a vacuum oven to obtain modified wormwood fiber.

[0017] Preferably, in S1, the mass fraction of the ethanol aqueous solution is 20%-60%, and the mass volume ratio of the wormwood fiber, sodium hydroxide and ethanol aqueous solution is 1g:(0.1-0.3)g:(10-30)mL.

[0018] Preferably, in S2, the mass fraction of the ethanol aqueous solution is 20%-60%, and the mass volume ratio of the activated wormwood fiber, the coupling agent KH-560 and the ethanol aqueous solution is 1g:(0.2-0.6)g:(20-40)mL.

[0019] Preferably, in S3, the mass volume ratio of the epoxylated wormwood fiber, p-aminobenzenesulfonamide and anhydrous ethanol is 1 g: (0.34-0.68) g: (20-40) mL.

[0020] Preferably, the preparation method of the chain extender enhancer comprises:

[0021] Step a. Weigh 4,6-diamino-2-mercaptopyrimidine and N-vinylcaprolactam and add them into anhydrous ethanol, stir and mix thoroughly to obtain a mixed solution A;

[0022] Step b. Under the protection of nitrogen, add a photoinitiator to the mixed solution A, and stir the reaction for 0.8-2.4 hours under the irradiation of ultraviolet light. After the reaction is completed, remove the solvent by rotary evaporation to obtain a chain extender enhancer.

[0023] Preferably, in step a, the mass volume ratio of 4,6-diamino-2-mercaptopyrimidine, N-vinylcaprolactam and anhydrous ethanol is (1.4-2.8) g: (1.5-3) g: (30-50) mL.

[0024] Preferably, in step b, the photoinitiator is benzoin methyl ether or benzoin dimethyl ether, and the added mass of the photoinitiator is 3.2%-6.4% of the mass of 4,6-diamino-2-mercaptopyrimidine.

[0025] Preferably, in step b, the wavelength of the ultraviolet light is 300-400nm, and the light intensity is 150-250mw / cm 2 .

[0026] Preferably, in step b, the stirring speed is 100-200 r / min.

[0027] In a second aspect, the present invention provides a method for preparing a mixed insole material of wormwood fiber and polyurethane, comprising the following steps:

[0028] The first step is to weigh the polyether polyol, catalyst, chain extender, foaming agent and foam stabilizer according to weight proportions, and stir and mix them at a speed of 500-600 r / min for 20-40 min at 25-35° C. to obtain a first mixture;

[0029] The second step is to add the modified wormwood fiber weighed in parts by weight into the first mixture, and stir at a speed of 500-600 r / min for 20-40 min at 75-85° C. to obtain a second mixture;

[0030] The third step is to cool the second mixture to 30-40°C, add diisocyanate weighed according to the weight, stir at a speed of 600-800r / min for 2-4 minutes, inject into the preheated mold, and obtain the desired insole material through foaming.

[0031] In a third aspect, the present invention provides an application of a mixed insole material of wormwood fiber and polyurethane in sports shoes or casual shoes.

[0032] The beneficial effects of the present invention are:

[0033] 1. The present invention prepares an insole material, which is synthesized from a polyurethane material with wormwood fiber. The insole material prepared by the present invention can not only maintain high elasticity and strength, but also have long-term antibacterial properties.

[0034] 2. The polyurethane insole material prepared by the present invention adopts diisocyanate and polyether polyol as main materials, modified wormwood fiber as added reinforcing material, and furthermore, a chain extender reinforcer prepared with 4,6-diamino-2-mercaptopyrimidine and N-vinylcaprolactam as raw materials is added. The prepared insole material has high strength and high elasticity, and also has good antibacterial properties.

[0035] 3. The modified wormwood fiber is alkaline activated on the basis of wormwood fiber to enhance the surface activity; then it is refluxed with an epoxy coupling agent to graft a large number of epoxy groups; and then it is amino-epoxy combined with amino-containing benzenesulfonamide. The prepared modified wormwood fiber not only has better compatibility with polyurethane, but also has enhanced antibacterial properties, and can also reduce the effect of the addition of simple wormwood fiber on the strength and elasticity of polyurethane.

[0036] 4. The chain extender used in the preparation of the insole material of the present invention contains a caprolactam group and a thioether group, which greatly improves the stability and strength of the polyurethane material. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the existence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to limit the scope of the present invention. The change or adjustment of the relative relationship thereof shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0038] In order to better understand the above technical scheme, the exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0039] The present invention will be further described below in conjunction with the following examples.

[0040] Example 1

[0041] A shoe insole material, calculated by weight, comprising the following components:

[0042] 32 parts of 4,4'-diphenylmethane diisocyanate MDI, 14 parts of toluene diisocyanate TDI, 93 parts of polytetramethylene ether glycol PTMEG-2000, 16 parts of modified wormwood fiber, 1.1 parts of dibutyltin dilaurate, 2.1 parts of chain extender, 1.8 parts of pure water and 0.9 parts of silicone oil Maitu L-5333.

[0043] The preparation method of modified wormwood fiber includes:

[0044] S1. Mix an aqueous solution of sodium hydroxide and 40wt% ethanol, stir until dissolved evenly, then add wormwood fiber (diameter 20 μm, length 30±1mm), the mass volume ratio of wormwood fiber, sodium hydroxide and ethanol aqueous solution is 1g:0.2g:20mL, soak at room temperature for 3h, then filter to remove the liquid, wash with pure water until the washing liquid is neutral, and then place in a vacuum box to dry to obtain activated wormwood fiber;

[0045] S2, the activated wormwood fiber and the aqueous solution of 40wt% ethanol are mixed, stirred and dispersed evenly, and then the coupling agent KH-560 is added, the mass volume ratio of the activated wormwood fiber, the coupling agent KH-560 and the aqueous solution of ethanol is 1g:0.4g:30mL, condensed and refluxed at 55°C for 6h, after the treatment is completed, the liquid is filtered out, washed with pure water at least 3 times, and placed in a vacuum box to dry to obtain epoxylated wormwood fiber;

[0046] S3. Weigh p-aminobenzenesulfonamide and anhydrous ethanol, mix them, heat to 65°C, stir until completely dissolved, then add epoxylated wormwood fiber, the mass volume ratio of epoxylated wormwood fiber, p-aminobenzenesulfonamide and anhydrous ethanol is 1g:51g:30mL, stir under reflux conditions for 5h, after the treatment is completed, wash with hot ethanol at least 3 times, place in a vacuum oven to dry, and obtain modified wormwood fiber.

[0047] The preparation method of the chain extender enhancer comprises:

[0048] Step a. Weigh 4,6-diamino-2-mercaptopyrimidine and N-vinyl caprolactam and add them into anhydrous ethanol. The mass volume ratio of 4,6-diamino-2-mercaptopyrimidine, N-vinyl caprolactam and anhydrous ethanol is 2.1 g: 2.2 g: 40 mL. Stir and mix well to obtain a mixed solution A.

[0049] Step b. Under the protection of nitrogen, 4.8% of benzoin dimethyl ether by mass of 4,6-diamino-2-mercaptopyrimidine was added to the mixed solution A, and the mixture was irradiated with ultraviolet light, the wavelength of which was 365nm and the intensity of which was 200mw / cm 2 The reaction was stirred at a speed of 150 r / min for 1.6 h. After the reaction was completed, the solvent was removed by rotary evaporation to obtain a chain extender enhancer.

[0050] The method for preparing the above-mentioned insole material comprises the following steps:

[0051] The first step is to weigh polytetramethylene glycol PTMEG-2000, dibutyltin dilaurate, chain extender, pure water and silicone oil Momentive L-5333 according to weight parts, and stir and mix at a speed of 550r / min for 30min at 30°C to obtain a first mixture;

[0052] The second step is to add the modified wormwood fiber weighed in parts by weight into the first mixture, and stir at 80° C. and 500 r / min for 30 min to obtain a second mixture;

[0053] The third step is to cool the second mixture to 35°C, add 4,4'-diphenylmethane diisocyanate MDI and toluene diisocyanate TDI weighed according to weight proportions, stir at 700r / min for 3 minutes, inject into a mold preheated at 55°C, foam and mold for 3 minutes, and demold to obtain the desired insole material.

[0054] Example 2

[0055] A shoe insole material, calculated by weight, comprising the following components:

[0056] 38 parts of 4,4'-diphenylmethane diisocyanate (MDI), 74 parts of polytetramethylene ether glycol PTMEG-2000, 7 parts of modified wormwood fiber, 0.7 parts of stannous octoate, 1.2 parts of chain extender, 1.3 parts of water and 0.6 parts of silicone oil Maitu L-580.

[0057] The preparation method of modified wormwood fiber includes:

[0058] S1. Mix an aqueous solution of sodium hydroxide and 20wt% ethanol, stir until dissolved evenly, then add wormwood fiber, the mass volume ratio of wormwood fiber, sodium hydroxide and ethanol aqueous solution is 1g:0.1g:10mL, soak at room temperature for 2h, then filter to remove the liquid, wash with pure water until the washing liquid is neutral, and then place in a vacuum box to dry to obtain activated wormwood fiber;

[0059] S2, the activated wormwood fiber and the 20wt% ethanol aqueous solution are mixed, stirred and dispersed evenly, and then the coupling agent KH-560 is added, the mass volume ratio of the activated wormwood fiber, the coupling agent KH-560 and the ethanol aqueous solution is 1g: 0.2g: 20mL, condensed and refluxed at 50°C for 4h, after the treatment is completed, the liquid is filtered out, washed with pure water at least 3 times, and placed in a vacuum box to dry to obtain epoxylated wormwood fiber;

[0060] S3. Weigh p-aminobenzenesulfonamide and anhydrous ethanol, mix them, heat to 60°C, stir until completely dissolved, then add epoxylated wormwood fiber, the mass volume ratio of epoxylated wormwood fiber, p-aminobenzenesulfonamide and anhydrous ethanol is 1g:0.34g:20mL, stir under reflux conditions for 3h, after the treatment is completed, wash with hot ethanol at least 3 times, place in a vacuum oven to dry, and obtain modified wormwood fiber.

[0061] The preparation method of the chain extender enhancer comprises:

[0062] Step a. Weigh 4,6-diamino-2-mercaptopyrimidine and N-vinyl caprolactam and add them into anhydrous ethanol. The mass volume ratio of 4,6-diamino-2-mercaptopyrimidine, N-vinyl caprolactam and anhydrous ethanol is 1.4 g:1.5 g:30 mL. Stir and mix well to obtain a mixed solution A.

[0063] Step b. Under the protection of nitrogen, 3.2% of benzoin methyl ether based on the mass of 4,6-diamino-2-mercaptopyrimidine was added to the mixed solution A, and the mixture was irradiated with ultraviolet light at a wavelength of 365nm and a light intensity of 150mw / cm 2 The reaction was stirred at a speed of 100 r / min for 0.8 h. After the reaction was completed, the solvent was removed by rotary evaporation to obtain a chain extender enhancer.

[0064] The method for preparing the above-mentioned insole material comprises the following steps:

[0065] The first step is to weigh polytetramethylene glycol PTMEG-2000, stannous octoate, chain extender, water and silicone oil Maitu L-580 according to weight parts, and stir and mix them at a speed of 500 r / min for 20 minutes at 25° C. to obtain a first mixture;

[0066] The second step is to add the modified wormwood fiber weighed in parts by weight into the first mixture, and stir at a speed of 500 r / min for 20 minutes at 75° C. to obtain a second mixture;

[0067] The third step is to cool the second mixture to 30°C, add 4,4'-diphenylmethane diisocyanate weighed according to the weight, stir at a speed of 600r / min for 2 minutes, inject into a mold preheated to 55°C, foam and mold for 2 minutes, and demold to obtain the desired insole material.

[0068] Example 3

[0069] A shoe insole material, calculated by weight, comprising the following components:

[0070] 54 parts of hexamethylene diisocyanate (HDI), 115 parts of polyoxypropylene glycol PPG-2000, 21 parts of modified mugwort fiber, 1.4 parts of dibutyltin diacetate, 3.4 parts of chain extender, 2.6 parts of water and 1.2 parts of silicone oil Momentive L-5702.

[0071] The preparation method of modified wormwood fiber includes:

[0072] S1. Mix an aqueous solution of sodium hydroxide and 60wt% ethanol, stir until dissolved evenly, then add wormwood fiber, the mass volume ratio of wormwood fiber, sodium hydroxide and ethanol aqueous solution is 1g:0.3g:30mL, soak at room temperature for 4h, then filter to remove the liquid, wash with pure water until the washing liquid is neutral, and then place in a vacuum box to dry to obtain activated wormwood fiber;

[0073] S2, the activated wormwood fiber and the 60wt% ethanol aqueous solution are mixed, stirred and dispersed evenly, and then the coupling agent KH-560 is added, the mass volume ratio of the activated wormwood fiber, the coupling agent KH-560 and the ethanol aqueous solution is 1g:0.6g:40mL, condensed and refluxed at 60°C for 10h, after the treatment is completed, the liquid is filtered out, washed with pure water at least 3 times, and placed in a vacuum box to dry to obtain epoxylated wormwood fiber;

[0074] S3. Weigh p-aminobenzenesulfonamide and anhydrous ethanol, mix them, heat to 70°C, stir until completely dissolved, then add epoxylated wormwood fiber, the mass volume ratio of epoxylated wormwood fiber, p-aminobenzenesulfonamide and anhydrous ethanol is 1g:0.68g:40mL, stir under reflux conditions for 8h, after the treatment is completed, wash with hot ethanol at least 3 times, place in a vacuum oven to dry, and obtain modified wormwood fiber.

[0075] The preparation method of the chain extender enhancer comprises:

[0076] Step a. Weigh 4,6-diamino-2-mercaptopyrimidine and N-vinyl caprolactam and add them into anhydrous ethanol. The mass volume ratio of 4,6-diamino-2-mercaptopyrimidine, N-vinyl caprolactam and anhydrous ethanol is 2.8 g:3 g:50 mL. Stir and mix well to obtain a mixed solution A.

[0077] Step b. Under the protection of nitrogen, add 6.4% of benzoin dimethyl ether by mass of 4,6-diamino-2-mercaptopyrimidine to the mixed solution A, and irradiate with ultraviolet light at a wavelength of 365nm and a light intensity of 250mw / cm 2 The mixture was stirred at a speed of 200 r / min for 2.4 h. After the reaction, the solvent was removed by rotary evaporation to obtain a chain extender.

[0078] The method for preparing the above-mentioned insole material comprises the following steps:

[0079] The first step is to weigh polyoxypropylene glycol PPG-2000, dibutyltin diacetate, chain extender, water and silicone oil Maitu L-5702 according to weight parts, and stir and mix at a speed of 600 r / min for 40 minutes at 35° C. to obtain a first mixture;

[0080] The second step is to add the modified wormwood fiber weighed in parts by weight into the first mixture, and stir at a speed of 600 r / min for 40 minutes at 75-85° C. to obtain a second mixture;

[0081] The third step is to cool the second mixture to 40°C, add hexamethylene diisocyanate (HDI) weighed according to the weight, stir at a speed of 800r / min for 4 minutes, inject into a mold preheated to 55°C, and foam and mold for 3 minutes. After demolding, the desired insole material is obtained.

[0082] Comparative Example 1

[0083] A shoe insole material, which differs from Example 1 in that the modified wormwood fiber is replaced by unmodified wormwood fiber, the chain extender enhancer is replaced by the traditional chain extender diethyltoluenediamine (DETDA), and the other ingredients and the preparation process remain unchanged.

[0084] Comparative Example 2

[0085] A shoe insole material, which differs from Example 1 in that the chain extender enhancer is replaced by the traditional chain extender diethyltoluenediamine (DETDA), and the other ingredients and the preparation process remain unchanged.

[0086] Comparative Example 3

[0087] A shoe insole material, which differs from Example 1 in that the chain extender is replaced by 4,6-diamino-2-mercaptopyrimidine, and the other components and the preparation process remain unchanged.

[0088] Experimental testing

[0089] In order to more clearly illustrate the content of the present invention, the present invention tests and compares the performance of the insole materials prepared in Example 1 and Comparative Examples 1-3. Among them, the tensile strength test refers to the method of GB / T 528-2009; the tear strength test refers to the method of GB / T 529-2008; the air permeability test uses a polymer porous elastic material air permeability meter to test the air permeability, the test pressure is 0.2MPa, and the test time is 24h; the compression permanent set rate test refers to the method of ISO 1856-2007, and the antibacterial property (after washing 20 times) test refers to QB / T 2881-2013 and T / CIAA001-2020.

[0090] Table 1 Performance test results of different insole materials

[0091]

[0092] It can be seen from Table 1 that, compared with Comparative Examples 1-3, the insole material prepared in Example 1 of the present invention has significantly enhanced tensile strength and tear strength while maintaining high air permeability and high resistance to compression deformation; at the same time, after being washed 20 times, the inhibition of Klebsiella pneumoniae and Staphylococcus aureus can still reach more than 99%, and the inhibition rate of Candida albicans is higher than 93%, indicating that its antibacterial performance is excellent.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0094] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A mixed insole material of wormwood fiber and polyurethane, characterized in that: The insole material comprises the following components calculated by weight: 38-54 parts of diisocyanate, 74-115 parts of polyether polyol, 7-21 parts of modified wormwood fiber, 0.7-1.4 parts of catalyst, 1.2-3.4 parts of chain extender, 1.3-2.6 parts of foaming agent and 0.6-1.2 parts of foam stabilizer.

2. The insole material of wormwood fiber and polyurethane mixed according to claim 1, characterized in that: The diisocyanate is at least one of 4,4'-diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and xylylene diisocyanate; the polyether polyol is polytetramethylene glycol PTMEG-2000 or polyoxypropylene glycol PPG-2000.

3. The insole material of wormwood fiber and polyurethane mixed according to claim 1, characterized in that: The catalyst is at least one of stannous octoate, dibutyltin diacetate, dibutyltin dilaurate, and di-n-octyltin dilaurate.

4. The insole material of wormwood fiber and polyurethane mixed according to claim 1, characterized in that: The foaming agent is pure water; the foam stabilizer is polyurethane soft foam silicone oil, and the models include at least one of Maitu L-580, Maitu L-5702, and Maitu L-5333.

5. The insole material of wormwood fiber and polyurethane mixed according to claim 1, characterized in that: The preparation method of the modified wormwood fiber comprises: S1. Mixing an aqueous solution of sodium hydroxide and ethanol, stirring until uniformly dissolved, then adding wormwood fiber, soaking at room temperature for 2-4 hours, then filtering to remove the liquid, washing and drying to obtain activated wormwood fiber; S2, mixing the activated wormwood fiber and the aqueous solution of ethanol, stirring and dispersing them evenly, adding coupling agent KH-560, condensing and refluxing at 50-60° C. for 4-10 hours, filtering to remove the liquid after the treatment, washing and drying to obtain epoxylated wormwood fiber; S3. Weigh p-aminobenzenesulfonamide and anhydrous ethanol, mix them, heat to 60-70°C, stir until they are completely dissolved, then add the epoxylated wormwood fiber, stir under reflux conditions for 3-8 hours, and after the treatment is completed, wash and dry to obtain modified wormwood fiber.

6. The insole material of wormwood fiber and polyurethane mixed according to claim 5, characterized in that: In S1, the mass volume ratio of the wormwood fiber, sodium hydroxide and ethanol aqueous solution is 1g:(0.1-0.3)g:(10-30)mL; in S2, the mass volume ratio of the activated wormwood fiber, coupling agent KH-560 and ethanol aqueous solution is 1g:(0.2-0.6)g:(20-40)mL; in S3, the mass volume ratio of the epoxylated wormwood fiber, para-aminobenzenesulfonamide and anhydrous ethanol is 1g:(0.34-0.68)g:(20-40)mL.

7. The insole material of wormwood fiber and polyurethane mixed according to claim 1, characterized in that: The preparation method of the chain extender enhancer comprises: Step a. Weigh 4,6-diamino-2-mercaptopyrimidine and N-vinylcaprolactam and add them into anhydrous ethanol, stir and mix thoroughly to obtain a mixed solution A; Step b. Under the protection of nitrogen, add a photoinitiator to the mixed solution A, and stir the reaction for 0.8-2.4 hours under the irradiation of ultraviolet light. After the reaction is completed, remove the solvent by rotary evaporation to obtain a chain extender enhancer.

8. The insole material of wormwood fiber and polyurethane mixed according to claim 7, characterized in that: In the step a, the mass volume ratio of 4,6-diamino-2-mercaptopyrimidine, N-vinyl caprolactam and anhydrous ethanol is (1.4-2.8) g:(1.5-3) g:(30-50) mL; in the step b, the photoinitiator is benzoin methyl ether or benzoin dimethyl ether, and the added mass of the photoinitiator is 3.2%-6.4% of the mass of 4,6-diamino-2-mercaptopyrimidine.

9. A method for preparing the mixed insole material of wormwood fiber and polyurethane according to claim 1, characterized in that: The following steps are involved: The first step is to weigh the polyether polyol, catalyst, chain extender, foaming agent and foam stabilizer according to weight proportions, and stir and mix them at a speed of 500-600 r / min for 20-40 min at 25-35° C. to obtain a first mixture; The second step is to add the modified wormwood fiber weighed in parts by weight into the first mixture, and stir at a speed of 500-600 r / min for 20-40 min at 75-85° C. to obtain a second mixture; The third step is to cool the second mixture to 30-40°C, add diisocyanate weighed according to the weight, stir at a speed of 600-800r / min for 2-4 minutes, inject into the preheated mold, and obtain the desired insole material through foaming.

10. Use of the mixed insole material of mugwort fiber and polyurethane according to claim 1 in sports shoes or casual shoes.

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