Mosquito-proof and ultraviolet-resistant wormwood chinlon

Abstract

The invention relates to the technical field of functional fibers, and particularly discloses wormwood anti-mosquito anti-ultraviolet chinlon which is prepared from the following raw materials in parts by weight: 100 to 300 parts of modified chinlon master batch, 5 to 10 parts of wormwood extract, 12 to 20 parts of silane coupling agent modified sepiolite, 1 to 5 parts of imidazole phosphate and 10 to 15 parts of dispersing agent. Bis (2, 3-epoxypropyl)-2, 5-furandimethyl ether and 2, 2-bis (4-epoxypropoxyphenyl) propane are adopted to synergistically modify the chinlon master batch, so that migration, volatilization and loss of wormwood mosquito-repelling active components are reduced, the light resistance and aging resistance of the fiber are enhanced, a stable matrix support is provided for long-acting mosquito repelling and ultraviolet resistance, and the service life of the chinlon master batch is prolonged. Therefore, the chinlon disclosed by the invention has efficient mosquito repelling and excellent ultraviolet resistance, and has a wide market application prospect.

Description

Technical Field

[0001] This invention relates to the field of functional fiber technology, and more specifically, to a mugwort-based mosquito-repellent and UV-resistant nylon. Background Technology

[0002] Nylon possesses excellent mechanical strength, abrasion resistance, moisture absorption, and dyeing properties, making it the most widely used synthetic fiber in clothing, home textiles, and outdoor protective applications. With the increasing demand for functional textiles, nylon fibers, which combine long-lasting mosquito repellency, UV protection, and aging resistance, have become an important direction for the industry's high-end development. In summer and outdoor environments, traditional mosquito repellents suffer from short-lasting effects, volatility, and potential skin irritation. Integrating mosquito repellency into the fiber itself, achieving long-lasting protection through controlled release of active components, has become a key research direction for functional fibers. Currently, mosquito repellent fibers are mostly prepared using finishing coatings or impregnation processes. While these processes are simple, they suffer from low adhesion of functional components, poor washability, easy migration and exudation due to friction, and impact on the original feel and breathability of the fabric, making it difficult to meet the durability requirements of outdoor textiles.

[0003] The masterbatch blending melt spinning method, which uniformly disperses functional components within the fiber matrix, is a primary way to improve mosquito repellency durability. For example, Chinese patent CN102618959A discloses a mosquito-repellent nylon 6 fiber and its preparation method. First, attapulgite is adsorbed with DEET esters, then additives and nylon 6 resin are added. The mixture is then extruded and granulated in a twin-screw extruder to obtain a mosquito-repellent nylon 6 masterbatch. The weight percentage formulation of the mosquito-repellent nylon masterbatch is: 60%-70% fiber-grade nylon 6 resin, 15%-30% attapulgite, and 0.1%-1% of an antioxidant consisting of MD697 and one of hindered phenolic, phosphite, or thiodipropionate antioxidants. A stabilizer of 0.1%-1% and a repellent ester of 5%-15% are added. Nylon 6 chips are then blended with the aforementioned repellent nylon 6 masterbatch at a weight ratio of 80-90:10-20 to produce repellent nylon 6 fiber. However, repellent nylon 6 fiber still has some drawbacks: it only contains a single chemical repellent ester, resulting in limited functionality and poor environmental friendliness; moreover, attapulgite clay has poor compatibility with the nylon matrix, easily leading to agglomeration and uneven dispersion of functional particles, resulting in increased spinning breakage rate and decreased fiber mechanical properties; in addition, nylon itself has weak resistance to light aging and is prone to photo-oxidative degradation under long-term ultraviolet radiation, manifesting as decreased strength and yellowing, making it difficult to achieve the integration of mosquito repellency and UV protection functions.

[0004] Based on the above statements, the present invention proposes a mugwort-based mosquito-repellent and UV-resistant nylon. Summary of the Invention

[0005] To address the aforementioned technical issues, this invention provides a mugwort-based mosquito-repellent and UV-resistant nylon that combines highly effective mosquito repellency with excellent UV protection properties, thereby meeting the market demand for safe, comfortable, and multifunctional protective textiles and possessing broad application prospects.

[0006] This invention provides a mugwort-based mosquito-repellent and UV-resistant nylon, employing the following technical solution: A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100-300 parts of modified nylon masterbatch, 5-10 parts of mugwort extract, 12-20 parts of silane coupling agent-modified sepiolite, 1-5 parts of imidazole phosphate, and 10-15 parts of dispersant.

[0007] Preferably, the modified nylon masterbatch is prepared by the following method: The bis-epoxy chain extender and polyamide 6 were mixed evenly at a mass ratio of (1-8):100. The mixture was then subjected to reaction extrusion using a twin-screw extruder at a temperature of 230-250℃ and a speed of 300-600rpm. The material remained in the screw for 1-3 minutes. After extrusion, the mixture was cooled with water, pelletized, and dried to obtain modified nylon masterbatch.

[0008] Preferably, the bis(epoxy) chain extender is obtained by mixing bis(2,3-epoxypropyl)-2,5-furan dimethyl ether and 2,2-bis(4-epoxypropoxyphenyl)propane in a mass ratio of (2-7):1.

[0009] Preferably, the bis(2,3-epoxypropyl)-2,5-furan dimethyl ether is prepared by the following method: 2,5-furandimethyl alcohol and epichlorohydrin were reacted at 45-55℃ for 3-5 h under tetrabutylammonium bromide catalysis. Then, sodium hydroxide solution was added dropwise and the system temperature was maintained to close the ring reaction for 2-4 h. After separation, washing with water, drying and vacuum distillation, bis(2,3-epoxypropyl)-2,5-furandimethyl ether was obtained.

[0010] Preferably, the mass ratio of 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution is 1:(1.7-2):0.05:2.5; and the concentration of the sodium hydroxide solution is 25-30 wt%.

[0011] Preferably, the structural formula of the bis(2,3-epoxypropyl)-2,5-furan dimethyl ether is: .

[0012] Preferably, the silane coupling agent modified sepiolite is prepared by the following method: First, the epoxy silane coupling agent is dispersed in a 30-50% ethanol solution under stirring to prepare a 10-20 wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5-6, and the hydrolysate is stirred at 50-65℃ for 1-2 hours. Then, nano-sepiolite is added at a solid-liquid ratio of (0.05-0.1) g / mL, and the temperature is raised to 70-80℃ for 6-12 hours. After centrifugation, filtration, washing, and drying, silane coupling agent modified sepiolite is obtained.

[0013] Preferably, the epoxy silane coupling agent is at least one selected from 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-(2,3-epoxypropoxypropyl)methyldiethoxysilane, and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0014] Preferably, the imidazole phosphate is at least one selected from 1,3-dimethylimidazolium phosphate, 1-butyl-3-methylimidazolium phosphate, and 1-ethyl-3-methylimidazolium phosphate.

[0015] Preferably, the dispersant is polyethylene glycol.

[0016] This invention also provides a method for preparing mugwort-based mosquito-repellent and UV-resistant nylon, using the following technical solution: A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, ultrasonically premix the Artemisia argyi extract and dispersant for 5-10 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20-40 minutes to obtain the mixture. S2. Add the modified nylon masterbatch to a twin-screw extruder for melting. After the nylon masterbatch melts, add the mixing material and continue to melt and blend. The material stays in the barrel for 8-12 minutes. After extrusion, cooling and pelletizing, functional composite masterbatch is obtained. S3 functional composite masterbatch is melt-spun, drawn, oiled, and wound to obtain mugwort mosquito-repellent and UV-resistant nylon.

[0017] Preferably, the melting temperatures in S2 are: 220-230℃ in zone 1, 235-245℃ in zone 2, 245-255℃ in zone 3, and 250-260℃ at the die head, with a screw speed of 180-220 r / min.

[0018] Preferably, the melt spinning temperature in S3 is: 230-240℃ in zone 1, 245-255℃ in zone 2, 255-265℃ in zone 3, spinneret temperature is 260-270℃, screw speed is 80-120 r / min, and the melting temperature is maintained for 3-5 min. Preferably, the temperature during stretching in S3 is 100-120℃, and the stretching ratio is 3.5-4.5 times.

[0019] In summary, the present invention has the following beneficial effects: 1. The modified nylon masterbatch of this invention uses a compound of bis(2,3-epoxypropyl)-2,5-furan dimethyl ether and 2,2-bis(4-epoxypropoxyphenyl)propane as a diepoxy chain extender to reactively extrude and modify polyamide 6. This significantly improves the molecular weight and structural density of the nylon matrix, reducing the migration, volatilization, and loss of the active components of Artemisia argyi mosquito repellent, while enhancing the fiber's own light and aging resistance, providing a stable matrix support for long-lasting mosquito repellency and UV protection. The silane coupling agent-modified sepiolite has a porous structure and good interfacial compatibility, enabling it to physically adsorb and load Artemisia argyi extract for long-lasting sustained release and improved mosquito repellency durability; it also blocks ultraviolet rays through physical shielding, synergistically improving the fiber's UV resistance with other components. Imidazole phosphate can form a stable interface with the fiber matrix and modified sepiolite, effectively absorbing and dissipating ultraviolet energy, significantly improving the fiber's resistance to ultraviolet radiation and photoaging. At the same time, it can further stabilize the mosquito repellent components in the system, reducing their loss during washing and use, and jointly ensuring a long-lasting mosquito repellent effect.

[0020] 2. The synergistic effect of the components of this invention gives the resulting nylon both long-lasting and stable mosquito repellent properties and excellent UV resistance, while also exhibiting good mechanical properties and washability, making it suitable for long-term use in outdoor protection, home textiles, and functional clothing. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Various changes and modifications made to the present invention without departing from its spirit and scope should fall within the protection scope of the present invention.

[0022] The specifications of the key raw materials used are as follows: Polyamide 6: Model BKV30H1.0, brand Lanxess (Germany), purchased from Chengdu Lingyue Plastics Co., Ltd.; Artemisia argyi extract: 10:1 specification, brand Klamar, purchased from Shanghai Puzhen Biotechnology Co., Ltd. Sepiolite powder: Model CY2505203, mesh size 1250, purchased from Lingshou County Chengyang Mining Co., Ltd.

[0023] Example 1 A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100 parts modified nylon masterbatch, 5 parts mugwort extract, 12 parts silane coupling agent modified sepiolite, 5 parts imidazole phosphate, and 10 parts dispersant. Among them, the imidazole phosphate is 1,3-dimethylimidazolium phosphate dimethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:1.7:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 45°C for 5 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 40°C, and 25 wt% sodium hydroxide solution was slowly added dropwise while stirring at 1000 rpm. The temperature of the system was controlled to not exceed 45°C by controlling the addition rate. After the addition was complete, the ring-closing reaction was continued at this temperature for 4 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and then collected under a vacuum of 1.5 mmHg. The fraction collected at 142-145℃ was used to obtain bis(2,3-epoxypropyl)-2,5-furan dimethyl ether. The bisepoxy chain extender (the mass ratio of bis(2,3-epoxypropyl)-2,5-furan dimethyl ether to 2,2-bis(4-epoxypropoxyphenyl)propane was 2:1) was mixed with polyamide 6, which was vacuum dried at 110℃ for 6 hours, at a mass ratio of 1:100. The mixture was then subjected to reactive extrusion at 230℃ and 300 rpm using a twin-screw extruder. The material was kept in the screw for 1 minute and then extruded into strips through the die head. After cooling in a circulating water bath at 25℃, the strips were pelletized by a pelletizer. The pellets were then pre-dried in a forced-air oven at 100℃ for 6 hours to obtain modified nylon masterbatch. Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltrimethoxysilane) is dispersed in a 30% ethanol solution under stirring to prepare a 10wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5, and the solution is hydrolyzed by stirring at 50℃ for 2 hours. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 hours) is added at a solid-liquid ratio of 0.05 g / mL. The temperature is raised to 70℃ and the reaction is carried out for 12 hours. The suspension after the reaction is centrifuged at 4000 rpm for 10 minutes, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 hours to obtain silane coupling agent modified sepiolite.

[0024] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0025] Example 2 A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 200 parts modified nylon masterbatch, 8 parts mugwort extract, 16 parts silane coupling agent-modified sepiolite, 1 part imidazole phosphate, and 13 parts dispersant. Among them, the imidazole phosphate is 1-ethyl-3-methylimidazolium phosphate diethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:1.8:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 50°C for 4 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 45°C, and 28 wt% sodium hydroxide solution was slowly added dropwise while stirring at 1100 rpm. The temperature of the system was controlled to keep it below 50°C. After the addition was complete, the ring-closing reaction was continued at this temperature for 3 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and then collected under a vacuum of 1.5 mmHg. The fraction collected at 142-145℃ was used to obtain bis(2,3-epoxypropyl)-2,5-furan dimethyl ether. The bisepoxy chain extender (bis(2,3-epoxypropyl)-2,5-furan dimethyl ether and 2,2-bis(4-epoxypropoxyphenyl)propane in a mass ratio of 5:1) was mixed with polyamide 6, which had been vacuum dried at 110℃ for 6 hours, at a mass ratio of 5:100. The mixture was then subjected to reactive extrusion at 240℃ and 450 rpm using a twin-screw extruder. The material was kept in the screw for 2 minutes and then extruded into strips through the die head. After cooling in a circulating water bath at 25℃, the strips were pelletized by a pelletizer. The pellets were then pre-dried in a forced-air oven at 100℃ for 6 hours to obtain modified nylon masterbatch. Silane coupling agent modified sepiolite was prepared by the following method: First, an epoxy silane coupling agent (3-(2,3-epoxypropoxypropyl)methyldiethoxysilane) was dispersed in a 40% ethanol solution under stirring to prepare a 15wt% silane coupling agent hydrolysate. The pH of the solution was adjusted to 5.5, and the solution was hydrolyzed by stirring at 60℃ for 1.5h. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4h) was added at a solid-liquid ratio of 0.08g / mL. The temperature was raised to 75℃ and the reaction was carried out for 8h. The suspension after the reaction was centrifuged at 4000rpm for 10min, the supernatant was discarded, and the precipitate was washed three times alternately with anhydrous ethanol and deionized water. The precipitate was filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12h to obtain silane coupling agent modified sepiolite.

[0026] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 8 minutes, then add the silane coupling agent modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 30 minutes to obtain the mixture. S2. After vacuum drying the modified nylon masterbatch at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 225℃, zone 2 240℃, zone 3 250℃, die head 255℃, screw speed 200r / min). After the nylon masterbatch melts, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 10 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 235℃, zone 2 250℃, zone 3 260℃, spinneret temperature 265℃, screw speed 100r / min, and holding for melting for 4 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 110℃, stretching ratio 4 times), oiled (oiling rate 1%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0027] Example 3 A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 300 parts modified nylon masterbatch, 10 parts mugwort extract, 20 parts silane coupling agent modified sepiolite, 3 parts imidazole phosphate, and 15 parts dispersant. Among them, the imidazole phosphate is 1-ethyl-3-methylimidazolium phosphate diethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:2:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 55°C for 3 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 50°C, and a 30wt% sodium hydroxide solution was slowly added dropwise while stirring at 1200 rpm. The temperature of the system was controlled to not exceed 55°C by controlling the addition rate. After the addition was complete, the ring-closing reaction was continued at this temperature for 2 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and collected under a vacuum of 1.5 mmHg. The fraction obtained at 142-145℃ yielded bis(2,3-epoxypropyl)-2,5-furan dimethyl ether; the bisepoxy chain extender (bis(2,3-epoxypropyl)-2,5-furan dimethyl ether to 2,2-bis(4-epoxypropoxyphenyl)propane in a mass ratio of 7:1) was mixed with polyamide 6 dried under vacuum at 110℃ for 6 hours at a mass ratio of 8:100. The mixture was then subjected to reactive extrusion at 250℃ and 600 rpm using a twin-screw extruder. The material remained in the screw for 3 minutes and was extruded into strips through the die head. After cooling in a circulating water bath at 25℃, the strips were pelletized by a pelletizer. The pellets were then pre-dried in a forced-air oven at 100℃ for 6 hours to obtain modified nylon masterbatch. Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltriethoxysilane) is dispersed in a 50% ethanol solution under stirring to prepare a 30 wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 6, and the solution is stirred and hydrolyzed at 65℃ for 1 h. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 h) is added at a solid-liquid ratio of 0.1 g / mL. The temperature is raised to 80℃ and reacted for 6 h. The suspension after reaction is centrifuged at 4000 rpm for 10 min, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 h to obtain silane coupling agent modified sepiolite.

[0028] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 10 minutes, then add the silane coupling agent modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 40 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 230℃, zone 2 245℃, zone 3 255℃, die head 260℃, screw speed 220r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 12 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1: 240℃, zone 2: 255℃, zone 3: 265℃, spinneret temperature: 270℃, screw speed: 120r / min, holding for melting for 5 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature: 120℃, stretching ratio: 4.5 times), oiled (oiling rate: 0.8%), and wound (winding speed: 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0029] To verify the overall performance of the nylon obtained in Examples 1-3 of the present invention, Comparative Examples 1-5 were set up, as follows: Comparative Example 1 Comparative Example 1 differs from Example 1 only in that an equal mass of polyamide 6 is used to replace the modified nylon masterbatch, as detailed below: A type of mugwort-infused mosquito-repellent and UV-resistant nylon, comprising the following raw materials in parts by weight: 100 parts of polyamide 6, 5 parts of mugwort extract, 12 parts of silane coupling agent-modified sepiolite, 5 parts of imidazole phosphate, and 10 parts of dispersant; Among them, the imidazole phosphate is 1,3-dimethylimidazolium phosphate dimethyl ester; the dispersant is polyethylene glycol 400; Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltrimethoxysilane) is dispersed in a 30% ethanol solution under stirring to prepare a 10wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5, and the solution is hydrolyzed by stirring at 50℃ for 2 hours. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 hours) is added at a solid-liquid ratio of 0.05 g / mL. The temperature is raised to 70℃ and the reaction is carried out for 12 hours. The suspension after the reaction is centrifuged at 4000 rpm for 10 minutes, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 hours to obtain silane coupling agent modified sepiolite.

[0030] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After vacuum drying polyamide 6 at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After polyamide 6 melts, the mixture is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0031] Comparative Example 2 Comparative Example 2 differs from Example 1 only in the preparation method of the modified nylon masterbatch; the bis(2,3-epoxypropyl)-2,5-furan dimethyl ether is used as the bis(2,3-epoxypropyl)-2,5-furan dimethyl ether, as detailed below: A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100 parts modified nylon masterbatch, 5 parts mugwort extract, 12 parts silane coupling agent modified sepiolite, 5 parts imidazole phosphate, and 10 parts dispersant. Among them, the imidazole phosphate is 1,3-dimethylimidazolium phosphate dimethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:1.7:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 45°C for 5 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 40°C, and a 25 wt% sodium hydroxide solution was slowly added dropwise while stirring at 1000 rpm. The temperature of the system was controlled to not exceed 45°C by controlling the addition rate. After the addition was complete, the ring-closing reaction was continued at this temperature for 4 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and then... The fraction collected at 142-145℃ under a vacuum of 1.5 mmHg was used to obtain bis(2,3-epoxypropyl)-2,5-furan dimethyl ether. The bisepoxy chain extender (bis(2,3-epoxypropyl)-2,5-furan dimethyl ether) and polyamide 6 dried under vacuum at 110℃ for 6 h were mixed evenly at a mass ratio of 1:100. The mixture was then reacted and extruded using a twin-screw extruder at a temperature of 230℃ and a speed of 300 rpm. The material was kept in the screw for 1 min and then extruded into strips through the die head. After being cooled by a circulating water bath at 25℃, the strips were pelletized by a pelletizer. The pellets were then pre-dried in a forced-air oven at 100℃ for 6 h to obtain modified nylon masterbatch. Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltrimethoxysilane) is dispersed in a 30% ethanol solution under stirring to prepare a 10wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5, and the solution is hydrolyzed by stirring at 50℃ for 2 hours. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 hours) is added at a solid-liquid ratio of 0.05 g / mL. The temperature is raised to 70℃ and the reaction is carried out for 12 hours. The suspension after the reaction is centrifuged at 4000 rpm for 10 minutes, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 hours to obtain silane coupling agent modified sepiolite.

[0032] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0033] Comparative Example 3 Comparative Example 3 is the same as Example 1, except that the preparation method of the modified nylon masterbatch is different, and the bis-epoxy chain extender is only 2,2-bis(4-epoxypropoxyphenyl)propane, as detailed below: A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100 parts modified nylon masterbatch, 5 parts mugwort extract, 12 parts silane coupling agent modified sepiolite, 5 parts imidazole phosphate, and 10 parts dispersant. Among them, the imidazole phosphate is 1,3-dimethylimidazolium phosphate dimethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch is prepared by the following method: A bis(4-epoxypropoxyphenyl)propane chain extender (2,2-bis(4-epoxypropoxyphenyl)propane) and polyamide 6 dried under vacuum at 110℃ for 6 hours are mixed uniformly at a mass ratio of 1:100. The mixture is then extruded using a twin-screw extruder at 230℃ and 300 rpm. The material remains in the screw for 1 minute and is extruded into strips through the die head. After cooling in a 25℃ circulating water bath, the strips are pelletized by a pelletizer. The pellets are then pre-dried in a 100℃ forced-air oven for 6 hours to obtain the modified nylon masterbatch. Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltrimethoxysilane) is dispersed in a 30% ethanol solution under stirring to prepare a 10wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5, and the solution is hydrolyzed by stirring at 50℃ for 2 hours. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 hours) is added at a solid-liquid ratio of 0.05 g / mL. The temperature is raised to 70℃ and the reaction is carried out for 12 hours. The suspension after the reaction is centrifuged at 4000 rpm for 10 minutes, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 hours to obtain silane coupling agent modified sepiolite.

[0034] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0035] Comparative Example 4 Comparative Example 4 is the same as Example 1, except that: sepiolite powder of equal mass is used to replace the silane coupling agent to modify the sepiolite, as detailed below: A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100 parts modified nylon masterbatch, 5 parts mugwort extract, 12 parts sepiolite powder, 5 parts imidazole phosphate, and 10 parts dispersant. Among them, the imidazole phosphate is 1,3-dimethylimidazolium phosphate dimethyl ester; the dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:1.7:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 45°C for 5 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 40°C, and 25 wt% sodium hydroxide solution was slowly added dropwise while stirring at 1000 rpm. The temperature of the system was controlled to not exceed 45°C by controlling the addition rate. After the addition was complete, the ring-closing reaction was continued at this temperature for 4 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and then collected under a vacuum of 1.5 mmHg. The fraction collected at 142-145℃ was used to obtain bis(2,3-epoxypropyl)-2,5-furan dimethyl ether. A bisepoxy chain extender (bis(2,3-epoxypropyl)-2,5-furan dimethyl ether to 2,2-bis(4-epoxypropoxyphenyl)propane in a mass ratio of 2:1) was mixed with polyamide 6, which had been vacuum-dried at 110℃ for 6 hours, at a mass ratio of 1:100. The mixture was then reacted and extruded using a twin-screw extruder at 230℃ and 300 rpm. The material remained in the screw for 1 minute and was extruded into strips through the die head. After cooling in a 25℃ circulating water bath, the strips were pelletized. The pellets were then pre-dried in a 100℃ forced-air oven for 6 hours to obtain modified nylon masterbatch.

[0036] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add sepiolite powder and imidazole phosphate, and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0037] Comparative Example 5 Comparative Example 5 is the same as Example 1, except that imidazole phosphate is not added, as detailed below: A type of mugwort-infused mosquito-repellent and UV-resistant nylon comprises the following raw materials in parts by weight: 100 parts modified nylon masterbatch, 5 parts mugwort extract, 12 parts silane coupling agent-modified sepiolite, and 10 parts dispersant. The dispersant is polyethylene glycol 400; Modified nylon masterbatch was prepared by the following method: 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution were prepared in a mass ratio of 1:1.7:0.05:2.5. The 2,5-furandiethanol and epichlorohydrin were reacted at 45°C for 5 hours under the catalysis of tetrabutylammonium bromide. The mixture was then cooled to 40°C, and 25 wt% sodium hydroxide solution was slowly added dropwise while stirring at 1000 rpm. The temperature of the system was controlled to not exceed 45°C by controlling the addition rate. After the addition was complete, the ring-closing reaction was continued at this temperature for 4 hours. After the reaction was completed, the mixture was allowed to stand and separated. The organic phase was washed with deionized water until neutral, dried over anhydrous magnesium sulfate, and then collected under a vacuum of 1.5 mmHg. The fraction collected at 142-145℃ was used to obtain bis(2,3-epoxypropyl)-2,5-furan dimethyl ether. The bisepoxy chain extender (the mass ratio of bis(2,3-epoxypropyl)-2,5-furan dimethyl ether to 2,2-bis(4-epoxypropoxyphenyl)propane was 2:1) was mixed with polyamide 6, which was vacuum dried at 110℃ for 6 hours, at a mass ratio of 1:100. The mixture was then subjected to reactive extrusion at 230℃ and 300 rpm using a twin-screw extruder. The material was kept in the screw for 1 minute and then extruded into strips through the die head. After cooling in a circulating water bath at 25℃, the strips were pelletized by a pelletizer. The pellets were then pre-dried in a forced-air oven at 100℃ for 6 hours to obtain modified nylon masterbatch. Silane coupling agent modified sepiolite is prepared by the following method: First, an epoxy silane coupling agent (3-glycidoxypropyltrimethoxysilane) is dispersed in a 30% ethanol solution under stirring to prepare a 10wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5, and the solution is hydrolyzed by stirring at 50℃ for 2 hours. Then, sepiolite powder (pre-activated by drying in an oven at 120℃ for 4 hours) is added at a solid-liquid ratio of 0.05 g / mL. The temperature is raised to 70℃ and the reaction is carried out for 12 hours. The suspension after the reaction is centrifuged at 4000 rpm for 10 minutes, the supernatant is discarded, and the precipitate is washed three times alternately with anhydrous ethanol and deionized water. The precipitate is filtered, washed with deionized water until neutral, and dried in a vacuum oven at 80℃ for 12 hours to obtain silane coupling agent modified sepiolite.

[0038] A method for preparing a mosquito-repellent and UV-resistant nylon made from Artemisia argyi includes the following steps: S1. First, premix the Artemisia argyi extract and dispersant with ultrasonic power at 400W for 5 minutes, then add the silane coupling agent modified sepiolite and continue ultrasonic mixing for 20 minutes to obtain the mixture. S2. After the modified nylon masterbatch is vacuum dried at 110℃ for 6 hours, it is added to a twin-screw extruder for melting (zone 1 220℃, zone 2 235℃, zone 3 245℃, die head 250℃, screw speed 180r / min). After the nylon masterbatch is melted, the mixing material is added through the side feed port to continue melting and blending. The material stays in the barrel for 8 minutes. It is then extruded into strips through the die head, cooled by a 25℃ circulating water bath, and pelletized by a pelletizer to obtain the functional composite masterbatch. S3. The functional composite masterbatch was vacuum dried at 110℃ for 6 hours and then melt-spun (zone 1 230℃, zone 2 245℃, zone 3 255℃, spinneret temperature 260℃, screw speed 80r / min, and holding for melting for 3 minutes). The melt was extruded through a spinneret with a diameter of 0.3mm and 36 holes, cooled and shaped by side blowing at a temperature of 25℃ and a wind speed of 0.4m / s, stretched (stretching temperature 100℃, stretching ratio 3.5 times), oiled (oiling rate 1.2%), and wound (winding speed 1225 m / min) to obtain Artemisia argyi mosquito repellent and UV resistant nylon.

[0039] The nylon obtained in Examples 1-3 and Comparative Examples 1-5 were respectively made into plain weave fabrics with a single layer thickness of 0.45 mm and an areal density of 280 g / m². 2 The following performance tests were conducted on the nylon fabric, and the following results were obtained, as shown in Table 1-3: (1) Mosquito repellent performance test Referring to GB / T 30126-2013 "Test Methods for Mosquito Repellent Performance of Textiles", the "Repellency Efficiency Method" was used to test the mosquito repellency rate of the fabric before and after washing. The fabric was washed 50 times according to GB / T 8629-2017 "Home Washing and Drying Procedures for Textile Testing". Each experiment was repeated 3 times, and the average value was taken. The specific test results are shown in Table 1.

[0040] Table 1: Test results of mosquito repellency performance of various nylon fabric samples As shown in Table 1, the mosquito repellency rates of Examples 1-3 were higher than those of Comparative Examples 1-5. This indicates that the dense matrix structure of the modified nylon masterbatch, the porous loading and slow-release effect of the silane coupling agent-modified sepiolite, and the stabilizing effect of imidazole phosphate on the mosquito repellent components synergistically reduce the migration and volatilization of Artemisia argyi extract, achieving long-term effective mosquito repellency. After 50 standard washes, Examples 1-3 still maintained a high mosquito repellency rate, indicating that the nylon of the present invention has beneficial wash resistance, effectively locks in functional components, and has a long-lasting mosquito repellent function.

[0041] Compared to Example 1, Comparative Example 1 shows that ordinary nylon has poor compatibility with functional components, and the mosquito-repellent ingredients are easily released and lost. Comparative Examples 2-3, compared to Example 1, show that the compounded bis-epoxy chain extender works synergistically to improve the nylon matrix structure and enhance the interfacial bonding stability of the functional components. Compared to Example 1, Comparative Example 4 shows that unmodified sepiolite has aggregated with the organic phase, resulting in insufficient loading and sustained-release capacity, and the mosquito-repellent ingredients volatilize rapidly. Compared to Example 1, Comparative Example 5 shows that without the addition of imidazole phosphate, the mosquito-repellent rate significantly decreases after washing. This is because imidazole phosphate and Artemisia argyi extract have hydrogen bonding, which helps enhance the adhesion stability of the mosquito-repellent ingredients.

[0042] (2) UV resistance test Referring to GB / T 18830-2009 "Evaluation of Ultraviolet Protection Performance of Textiles", the ultraviolet protection factor (UPF) and the transmittance T(UVA) of ultraviolet A (320-420nm) of the fabric were determined. Referring to GB / T 35256-2017 "Tests for Color Fastness of Textiles - Artificial Climate Aging Exposed to Filtered Xenon Arc Radiation", the exposure conditions were 7.1A in the standard. After aging treatment, the UPF was measured again. Each group of experiments was repeated 3 times, and the results were averaged. The specific test results are shown in Table 2.

[0043] Table 2: Test results of UV resistance of various nylon fabric samples As shown in Table 2, the nylon prepared in Examples 1-3 of this invention exhibits excellent UV resistance and outstanding weather resistance. Comparative Example 1 uses ordinary nylon 6, resulting in poor dispersion of functional components and a significant decrease in UV protection. Comparative Examples 2-3 use a single bis-epoxy chain extender, leading to weak interfacial bonding and inferior UV resistance and aging resistance compared to the examples. Comparative Example 4 uses unmodified sepiolite, resulting in uneven dispersion of inorganic particles and reduced UV shielding efficiency. Comparative Example 5 does not contain imidazole phosphate, lacking the thermal stability and UV quenching effect of imidazole phosphate, making it prone to photodegradation under xenon arc aging, leading to a significant decrease in protective performance after aging.

[0044] (3) Mechanical property testing The breaking strength (cN / dtex) and elongation at break (%) of nylon fiber samples were tested using a YG004A electronic single-fiber tensile tester. Test conditions were: temperature 20±2℃, relative humidity 65±5%, clamping length 20mm, tensile speed 20mm / min. Twenty valid data points were collected for each test group, and the average value was taken. Specific test results are shown in Table 3.

[0045] Table 3: Test results of mechanical properties of various nylon fiber samples As shown in Table 3, the breaking strength of the mugwort-based mosquito-repellent and UV-resistant nylon prepared in Examples 1-3 of this invention is significantly higher than that of Comparative Examples 1-5, and the breaking elongation is moderate, meeting the requirements for spinning and wear. Comparative Example 1 uses ordinary nylon 6, which has poor compatibility between the matrix and functional components, resulting in lower mechanical properties; Comparative Examples 2-3 use a single bis-epoxy chain extender, which has insufficient chain extension effect, resulting in weaker strength than Example 1 of this invention; Comparative Example 4 uses unmodified sepiolite, which is prone to particle agglomeration, causing stress concentration and resulting in the lowest breaking strength; Comparative Example 5 does not add imidazole phosphate, which has limited improvement on interfacial compatibility, and its mechanical properties are still lower than those of Example 1.

[0046] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A type of mugwort-infused mosquito-repellent and UV-resistant nylon, characterized in that, The raw materials include the following parts by weight: 100-300 parts of modified nylon masterbatch, 5-10 parts of Artemisia argyi extract, 12-20 parts of silane coupling agent modified sepiolite, 1-5 parts of imidazole phosphate, and 10-15 parts of dispersant.

2. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 1, characterized in that, The modified nylon masterbatch is prepared by the following method: The bis-epoxy chain extender and polyamide 6 were mixed evenly at a mass ratio of (1-8):

100. The mixture was then subjected to reaction extrusion using a twin-screw extruder at a temperature of 230-250℃ and a speed of 300-600rpm. The material remained in the screw for 1-3 minutes. After extrusion, the mixture was cooled with water, pelletized, and dried to obtain modified nylon masterbatch.

3. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 2, characterized in that, The bis(epoxy) chain extender is obtained by mixing bis(2,3-epoxypropyl)-2,5-furan dimethyl ether and 2,2-bis(4-epoxypropoxyphenyl)propane in a mass ratio of (2-7):

1.

4. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 3, characterized in that, The bis(2,3-epoxypropyl)-2,5-furan dimethyl ether is prepared by the following method: 2,5-furandimethyl alcohol and epichlorohydrin were reacted at 45-55℃ for 3-5 h under tetrabutylammonium bromide catalysis. Then, sodium hydroxide solution was added dropwise and the system temperature was maintained to close the ring reaction for 2-4 h. After separation, washing with water, drying and vacuum distillation, bis(2,3-epoxypropyl)-2,5-furandimethyl ether was obtained.

5. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 4, characterized in that, The mass ratio of 2,5-furandiethanol, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution is 1:(1.7-2):0.05:2.5; the concentration of the sodium hydroxide solution is 25-30 wt%.

6. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 1, characterized in that, The silane coupling agent modified sepiolite is prepared by the following method: First, the epoxy silane coupling agent is dispersed in a 30-50% ethanol solution under stirring to prepare a 10-20 wt% silane coupling agent hydrolysate. The pH of the solution is adjusted to 5-6, and the hydrolysate is stirred at 50-65℃ for 1-2 hours. Then, nano-sepiolite is added at a solid-liquid ratio of (0.05-0.1) g / mL, and the temperature is raised to 70-80℃ for 6-12 hours. After centrifugation, filtration, washing, and drying, silane coupling agent modified sepiolite is obtained.

7. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 6, characterized in that, The epoxy silane coupling agent is at least one of 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-(2,3-epoxypropoxypropyl)methyldiethoxysilane, and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

8. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 1, characterized in that, The imidazole phosphate is at least one of 1,3-dimethylimidazolium phosphate, 1-butyl-3-methylimidazolium phosphate, and 1-ethyl-3-methylimidazolium phosphate.

9. The mugwort-infused mosquito-repellent and UV-resistant nylon according to claim 1, characterized in that, The dispersant is polyethylene glycol.

10. A method for preparing the mugwort-based mosquito-repellent and UV-resistant nylon according to any one of claims 1-9, characterized in that, Includes the following steps: S1. First, ultrasonically premix the Artemisia argyi extract and dispersant for 5-10 minutes, then add the silane coupling agent-modified sepiolite and imidazole phosphate, and continue ultrasonic mixing for 20-40 minutes to obtain the mixture. S2. Add the modified nylon masterbatch to a twin-screw extruder for melting. After the nylon masterbatch melts, add the mixing material and continue to melt and blend. The material stays in the barrel for 8-12 minutes. After extrusion, cooling and pelletizing, functional composite masterbatch is obtained. S3 functional composite masterbatch is melt-spun, drawn, oiled, and wound to obtain mugwort mosquito-repellent and UV-resistant nylon.

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