Preparation of mosquito repellent textile using natural plant extract and method thereof

Abstract

The application relates to a kind of mosquito repellent textiles prepared from natural plant extracts and a preparation method thereof, and relates to the application field of textile technology. The application comprises the following steps: selecting natural plants with mosquito repellent and insecticidal effects to determine natural mosquito repellent raw materials; preparing mosquito repellent spinning solution from the natural mosquito repellent raw materials; preparing mosquito repellent micro-nano fibers from the mosquito repellent spinning solution prepared from the natural mosquito repellent raw materials; combining the mosquito repellent micro-nano fibers with textile short fibers to prepare mosquito repellent yarn; and obtaining mosquito repellent textiles through weaving and dyeing and finishing of the mosquito repellent yarn. The application integrates knowledge of botany, traditional Chinese medicine, chemistry, chemical engineering, and textile science, covers electrospinning and textile engineering technology, selects, analyzes, and chemically purifies natural renewable plant resources, develops multifunctional textiles with natural non-toxic, eco-friendly, degradable, mosquito repellent, antibacterial, moisture-absorbing, and breathable properties, and has broad market prospects and practical use value.

Description

Technical Field

[0001] This invention relates to the field of textile production technology, and in particular to a method for preparing mosquito-repellent textiles using natural plant extracts. Background Technology

[0002] In daily life, mosquito bites pose a significant threat to human health. Not only do they cause itchy and painful skin, but they can also transmit diseases such as dengue fever and malaria.

[0003] In the field of mosquito repellent textiles, the market currently mainly uses two types of repellents: synthetic and natural. Synthetic repellents include organic esters, aromatic alcohols, unsaturated aldehydes and ketones, amines, and amides. Common synthetic repellents include DEET (N,N-diethyl-m-toluamide), Picaridin (isobutyl hydroxyethylpiperidine carboxylate), lemon eucalyptus oil (p-menthane-3,8-diol), and IR3535 (Imonin). Compared to synthetic repellents, natural repellents are usually plant-based, derived from the roots, stems, leaves, and flowers of plants, and include terpenoid esters, alcohols, and ketones. Natural repellents are characterized by low or non-toxicity, less skin burning sensation, fresh scent, no residue, easy degradation, and low pollution. However, their mosquito-repellent performance and durability are generally lower than those of synthetic repellents. Furthermore, converting plant resources into products for public use requires consideration of multiple factors, including the development and protection of plant resources, their environmental and ecological impacts, industrial feasibility, and economic and social benefits.

[0004] Therefore, it is of great significance to research and develop a method for preparing mosquito-repellent textiles using natural plant extracts that is efficient, washable, requires low dosage, and can be industrially produced. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a method for preparing mosquito-repellent textiles using natural plant extracts, which solves the problems of insufficient mosquito-repellent effect, difficult processing, and short-lasting function of existing natural mosquito-repellent products, and achieves the goals of product safety, environmental protection, eco-friendliness, health therapy, air freshening, and comfort and mental refreshment.

[0006] To achieve the above-mentioned objectives, this invention provides a method for preparing mosquito-repellent textiles using natural plant extracts, comprising the following steps: (a) Select natural plants with mosquito-repellent and insect-killing effects to determine natural mosquito-repellent functional raw materials; (b) Formulate mosquito-repellent spinning solution from natural mosquito-repellent raw materials; (c) Prepare mosquito-repellent micro / nanofibers from mosquito-repellent spinning solution made from natural mosquito-repellent functional raw materials; (d) Prepare mosquito-repellent yarn by combining mosquito-repellent micro / nanofibers with textile short fibers; (e) Mosquito-repellent yarn is woven and dyed to obtain mosquito-repellent textiles.

[0007] Furthermore, the natural plants include one or more of the following: artemisia, night-blooming jasmine, lavender, geranium, neem, peppermint, patchouli, basil, and impatiens; the natural mosquito-repellent functional raw material is a powder, microcapsule, or emulsion formed by extracting and separating the effective mosquito-repellent components from natural plants, and the effective components of the natural mosquito-repellent functional raw material are one or more of the following: eucalyptus oil, citronella oil, camphor, xylitol, menthol, limonene, linalool, and fragrance.

[0008] Furthermore, the mosquito-repellent spinning solution is prepared by mixing polyacrylonitrile powder, N,N-dimethylformamide, and natural mosquito-repellent functional raw materials, followed by stirring and ultrasonic pulverization to form a uniform spinning solution; the weight of polyacrylonitrile powder in the spinning solution accounts for 5-15% of the weight of the spinning solution; the natural mosquito-repellent functional raw materials are screened and compounded according to technical requirements, and the weight content of the natural mosquito-repellent functional raw materials is 5-30% of the polyacrylonitrile powder content; the natural mosquito-repellent functional raw materials are small-particle-size powders and microcapsules.

[0009] Furthermore, the steps for manufacturing the mosquito-repellent micro / nanofibers are as follows: the mosquito-repellent spinning solution is transferred into the electrostatic spinning supply system. The electrostatic spinning production process is optimized according to the properties and concentration of the spinning solution, the ambient temperature and humidity, and the carding speed. The receiving distance of the spinning web is 10-40cm. The electrostatic spinning equipment is turned on, the flow rate pump speed of the supply system is set to 1.0-2.0r / min, the applied voltage is set to 30-60KV, the carding machine speed is controlled, and the corresponding parameters are matched according to the filament output state to obtain continuously produced, uniformly embedded and composite mosquito-repellent micro / nanofibers and short fiber composite slivers.

[0010] Furthermore, the short fibers in the mosquito-repellent micro / nanofiber and short fiber composite sliver are one or more natural fibers selected from polylactic acid fiber, lyocell, modal, acetate fiber, bamboo fiber, and high-quality cotton; during the process of combining the mosquito-repellent micro / nanofiber and short fiber, an oven and a far-infrared heating device are installed before the composite net is bundled to ensure that the sliver is dry and the solvent is completely evaporated without residue.

[0011] Furthermore, the mosquito-repellent yarn is spun using a blend of cotton, lyocell, and bamboo fiber. The cotton and lyocell fibers undergo electrospinning to repel mosquitoes, specifically by transferring the aforementioned mosquito-repellent spinning solution into an electrospinning supply system to obtain mosquito-repellent micro / nanofibers. The bamboo fiber is not subjected to this electrospinning treatment. The content of the mosquito-repellent micro / nanofibers accounts for 0.5-10‰ of the weight of the mosquito-repellent yarn. The mosquito-repellent sliver is processed into yarn through drawing, roving, spinning, and winding processes. The mosquito-repellent yarn is spun using a compact spinning method, forming a cotton, bamboo, and lyocell mosquito-repellent blended yarn.

[0012] Furthermore, the mosquito-repellent textile is processed through warping, sizing, heddle threading, weaving, and dyeing. In the pretreatment and dyeing processes, the process parameters are as follows: caustic soda dosage in pretreatment is 32 g / L, machine speed is 70 m / min, caustic soda concentration in dyeing is 10 g / L, temperature is 125℃, and machine speed is 55 m / min. The process parameters include, but are not limited to, acid and alkali concentration, temperature, and pressure parameters.

[0013] Furthermore, the mosquito-repellent textile is made into a knitted jersey fabric using a weft-knitted circular knitting machine.

[0014] Compared with existing technologies, this invention integrates knowledge from multiple disciplines such as botany, traditional Chinese medicine, chemistry, and textiles, encompassing electrospinning technology and textile engineering. Through the screening, analysis, and chemical purification of natural renewable plant resources, combined with functional polymer materials and green biodegradable fiber materials, the resulting mosquito-repellent textiles possess advantages such as being natural and non-toxic, eco-friendly and biodegradable, mosquito-repellent, antibacterial, fragrant, and breathable. This allows people to easily repel mosquitoes, reduce the risk of disease transmission, and create a safe and healthy living environment. This invention meets people's demand for green and healthy textiles and has broad market prospects and practical application value. Detailed Implementation

[0015] The present invention will now be described in detail through specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also apply to the scope defined by the appended claims.

[0016] This invention discloses a method for preparing mosquito-repellent textiles using natural plant extracts, comprising the following steps: (a) Select natural plants with mosquito-repellent and insect-killing effects to determine natural mosquito-repellent functional raw materials; (b) Formulate mosquito-repellent spinning solution from natural mosquito-repellent raw materials; (c) Prepare mosquito-repellent micro / nanofibers from mosquito-repellent spinning solution made from natural mosquito-repellent functional raw materials; (d) Prepare mosquito-repellent yarn by combining mosquito-repellent micro / nanofibers with textile short fibers; (e) Mosquito-repellent yarn is woven and dyed to obtain mosquito-repellent textiles.

[0017] Preferably, the natural plants include one or more of the following: mugwort, night-blooming jasmine, lavender, geranium, neem, peppermint, patchouli, basil, and impatiens. The natural mosquito-repellent functional ingredient is a powder, microcapsule, or emulsion formed by extracting and separating the effective mosquito-repellent components from natural plants. When selecting extract powders, microcapsules, or emulsions, attention should be paid to the particle size, material compatibility, acid and alkali resistance, and high-temperature resistance of the materials. The effective components of the natural mosquito-repellent functional ingredient are one or more of the following: eucalyptus oil, citronella oil, camphor, xylitol, menthol, limonene, linalool, and fragrance.

[0018] Preferably, the mosquito-repellent spinning solution is prepared by mixing polyacrylonitrile powder, N,N-dimethylformamide, and natural mosquito-repellent functional raw materials, followed by stirring and ultrasonic pulverization to form a uniform spinning solution; the weight of polyacrylonitrile powder in the spinning solution accounts for 5-15% of the weight of the spinning solution; the natural mosquito-repellent functional raw materials are screened and compounded according to technical requirements, and the weight content of the natural mosquito-repellent functional raw materials is 5-30% of the polyacrylonitrile powder content; the natural mosquito-repellent functional raw materials are small-particle-size powders and microcapsules.

[0019] Preferably, the mosquito-repellent micro / nanofiber manufacturing steps are as follows: the mosquito-repellent spinning solution is transferred into the electrostatic spinning supply system. The electrostatic spinning production process is optimized according to the properties and concentration of the spinning solution, the ambient temperature and humidity, and the carding speed. The receiving distance of the spinning web is 10-40cm. The electrostatic spinning equipment is turned on, the flow pump speed of the supply system is set to 1.0-2.0r / min, the applied voltage is set to 30-60KV, the carding machine speed is controlled, and the corresponding parameters are matched according to the filament output state to obtain continuously produced, uniformly embedded and composite mosquito-repellent micro / nanofibers and short fiber composite slivers.

[0020] Preferably, the mosquito-repellent micro / nanofiber and short fiber composite sliver is a mosquito-repellent micro / nanofiber composite sliver, and the short fiber is one or more natural fibers selected from polylactic acid fiber, lyocell, modal, acetate fiber, bamboo fiber, and high-quality cotton.

[0021] Preferably, during the composite process of mosquito-repellent micro-nano fibers and traditional short fiber aggregates, there may be solvent residue or web adhesion issues. To solve this problem, a heating device (oven, far-infrared heating device) can be added before the composite web is bundled to ensure that the raw sliver is dry and the solvent evaporates completely without residue.

[0022] Preferably, the mosquito-repellent yarn is spun from a blend of cotton, lyocell, and bamboo fiber, with a spinning ratio of 50% cotton, 20% lyocell, and 30% bamboo fiber. The three fiber raw materials can be uniformly mixed according to the blending ratio during the cotton opening and cotton-grabbing process, or they can be made into slivers separately and then mixed according to the process ratio during the drawing process. In both Examples 1 and 2, the drawing process is used for uniform mixing. In the cotton, bamboo, and lyocell blended yarn, the cotton and lyocell fibers undergo electrostatic spinning for mosquito repellency, while the bamboo fiber does not. The content of mosquito-repellent micro / nanofibers accounts for 0.5-10‰ of the weight of the mosquito-repellent yarn. The mosquito-repellent sliver is processed into yarn through drawing, roving, spinning, and winding processes. The spinning of the mosquito-repellent yarn uses compact spinning to form a cotton, bamboo, and lyocell mosquito-repellent blended yarn.

[0023] Preferably, the mosquito-repellent textile is processed through warping, sizing, heddle threading, weaving, and dyeing. In the pretreatment and dyeing processes, the process parameters are as follows: caustic soda dosage in pretreatment is 32 g / L, machine speed is 70 m / min, caustic soda concentration in dyeing is 10 g / L, temperature is 125℃, and machine speed is 55 m / min. The process parameters include, but are not limited to, acid and alkali concentration, temperature, and pressure parameters.

[0024] Preferably, the mosquito-repellent textile is made of knitted jersey fabric using a weft-knitted circular knitting machine.

[0025] The present invention will be further described below with reference to the embodiments. Example 1

[0026] A method for preparing mosquito-repellent textiles using natural plant extracts includes the following steps: Step 1: Identify and screen natural mosquito-repellent and insecticidal raw material A. The natural mosquito-repellent functional ingredient A selected in Example 1 includes Artemisia argyi extract powder, peppermint essential oil microcapsules, and citric acid eucalyptol, with the following weight composition: 20 parts Artemisia argyi extract powder, 20 parts peppermint essential oil microcapsules, 50 parts citric acid eucalyptol, and 10 parts N,N-dimethylformamide.

[0027] Step 2: Preparation of mosquito-repellent spinning solution Accurately weigh 40.0 g of polyacrylonitrile powder (PAN), and weigh N,N-dimethylformamide solvent at a mass ratio of polyacrylonitrile:N,N-dimethylformamide = 1:11 to prepare 500 mL of polyacrylonitrile spinning solution. During stirring, slowly add 10 g of the natural mosquito-repellent functional raw material A selected in step 1 to the spinning solution, and continue stirring for more than 10 hours to obtain the mosquito-repellent spinning solution.

[0028] Step 3: Preparation of mosquito-repellent micro / nanofibers The mosquito-repellent spinning solution prepared in step 2 is transferred into the electrostatic spinning supply system. The air conditioning and circulating air system are turned on, and the distance between the yarn outlet and the receiving net is adjusted to 30±2cm. The electrostatic spinning equipment is turned on, and the flow rate pump speed of the supply system is set to 1.0-2.0r / min. The applied voltage is set to 36-50KV. The carding machine speed is controlled, and the corresponding parameters are matched according to the yarn output state to obtain a continuously produced, uniformly inlaid and composite mosquito-repellent micro-nano fibers and conventional short fibers composite sliver, i.e., a mosquito-repellent sliver. Among them, the conventional short fiber weft can be made by inlaying and compositeting one or more short fiber aggregates of polylactic acid fiber, lyocell, modal, acetate fiber, bamboo fiber, and high-quality cotton natural fiber. In this example 1, the natural fiber is selected by blending lyocell short fiber weft, bamboo fiber, and high-quality cotton.

[0029] Step 4: Prepare mosquito-repellent yarn The yarn composition is 50% cotton, 20% lyocell, and 30% bamboo fiber. The cotton and lyocell fibers undergo electrospinning for insect repellency, while the bamboo fiber is not treated. The content of insect-repellent micro / nanofibers accounts for 0.5-10‰ of the yarn weight. The insect-repellent sliver is processed through drawing, roving, spinning, and re-doping to produce the yarn. The spinning process uses compact spinning to create a 50s / 2 cotton, bamboo fiber, and lyocell insect-repellent blended yarn.

[0030] Step 5: Production of mosquito-repellent textiles The mosquito-repellent yarn produced in step 4 is used to weave a mosquito-repellent fabric. The warp yarn is a blend of 50s / 2 cotton, bamboo fiber, and lyocell mosquito-repellent yarn, and the weft yarn is a blend of 50s / 2 cotton, bamboo fiber, and lyocell mosquito-repellent yarn with 40D spandex. The fabric is made into a 2 / 1 right twill fabric by air-jet loom. Example 2

[0031] A method for preparing mosquito-repellent textiles using natural plant extracts includes the following steps: Step 1: Identify and screen natural mosquito-repellent and insecticidal ingredient B. The natural mosquito-repellent ingredient B selected in Example 2 contains linalool, geranium extract, and peppermint oil microcapsules, with the following weight composition: 20 parts linalool, 30 parts geranium extract, 40 parts peppermint oil microcapsules, and 10 parts N,N-dimethylformamide.

[0032] Step 2: Preparation of mosquito-repellent spinning solution Accurately weigh 40.0 g of polyacrylonitrile powder (PAN), and weigh N,N-dimethylformamide solvent at a mass ratio of polyacrylonitrile:N,N-dimethylformamide = 1:11 to prepare 500 mL of polyacrylonitrile spinning solution. During stirring, slowly add 10 g of the natural mosquito-repellent functional raw material B selected in step 1 to the spinning solution, and continue stirring for more than 10 hours to obtain the mosquito-repellent spinning solution.

[0033] Step 3: Preparation of mosquito-repellent micro / nanofibers The mosquito-repellent spinning solution prepared in step 2 is transferred into the electrostatic spinning supply system. The air conditioning and circulating air system are turned on, and the distance between the yarn outlet and the receiving net is adjusted to 28±2cm. The electrostatic spinning equipment is turned on, and the flow rate pump speed of the supply system is set to 1.0-2.0r / min. The applied voltage is set to 40-52KV. The carding machine speed is controlled, and the corresponding parameters are matched according to the yarn output state to obtain a continuously produced, uniformly inlaid composite sliver of mosquito-repellent micro-nano fibers and conventional short fibers, i.e., a mosquito-repellent sliver. Among them, the conventional short fibers can be one or more short fiber aggregates of polylactic acid fiber, lyocell, modal, acetate fiber, bamboo fiber, and high-quality cotton natural fibers for inlay composite. In this example 2, the natural fibers are selected from lyocell short fibers, bamboo fibers, and high-quality cotton for blending.

[0034] Step 4: Prepare mosquito-repellent yarn The yarn composition is 50% cotton, 20% lyocell, and 30% bamboo fiber. The cotton and lyocell fibers undergo electrospinning for insect repellency, while the bamboo fiber is not treated. The content of insect-repellent micro / nanofibers accounts for 0.5-10‰ of the yarn weight. The insect-repellent sliver is processed through drawing, roving, spinning, and re-doping to form the yarn. The spinning process uses compact spinning and incorporates 40D spandex yarn to create a 60s / 2 cotton, bamboo fiber, and lyocell insect-repellent elastic yarn.

[0035] Step 5: Production of mosquito-repellent textiles The mosquito-repellent elastic yarn produced in step 4 is used to make plain knitted jersey fabric using a weft knitting circular knitting machine. The jersey fabric has a weight of 170g / m². 2 .

[0036] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A method for preparing mosquito-repellent textiles using natural plant extracts, comprising the following steps: (a) Select natural plants with mosquito-repellent and insect-killing effects to determine natural mosquito-repellent functional raw materials; (b) Formulate mosquito-repellent spinning solution from natural mosquito-repellent raw materials; (c) Prepare mosquito-repellent micro / nanofibers from mosquito-repellent spinning solution made from natural mosquito-repellent functional raw materials; (d) Prepare mosquito-repellent yarn by combining mosquito-repellent micro / nanofibers with textile short fibers; (e) Mosquito-repellent yarn is woven and dyed to obtain mosquito-repellent textiles; The natural plants include one or more of the following: mugwort, night-blooming jasmine, lavender, geranium, neem, peppermint, patchouli, basil, and impatiens; the natural mosquito-repellent functional raw material is a powder, microcapsule, or emulsion formed by extracting and separating the effective mosquito-repellent components from natural plants, and the effective components of the natural mosquito-repellent functional raw material are one or more of the following: eucalyptus oil, citronella oil, camphor, xylitol, menthol, limonene, linalool, and fragrance. The mosquito-repellent spinning solution is made by mixing polyacrylonitrile powder, N,N-dimethylformamide, and natural mosquito-repellent functional raw materials, followed by stirring and ultrasonic pulverization to form a uniform spinning solution. The polyacrylonitrile powder accounts for 5-15% of the weight of the spinning solution. The natural mosquito-repellent functional raw materials are screened and compounded according to technical requirements, and their weight content is 5-30% of the polyacrylonitrile powder content. The natural mosquito-repellent functional raw materials are small-particle-size powders and microcapsules. The steps for producing the mosquito-repellent micro / nanofibers are as follows: the mosquito-repellent spinning solution is transferred into the electrostatic spinning supply system. The electrostatic spinning production process is optimized according to the properties and concentration of the spinning solution, the ambient temperature and humidity, and the carding speed. The receiving distance of the spinning web is 10-40cm. The electrostatic spinning equipment is turned on, the flow rate of the supply system is set to 1.0-2.0r / min, the applied voltage is set to 30-60KV, the carding machine speed is controlled, and the corresponding parameters are matched according to the filament output state to obtain continuously produced, uniformly embedded and composite mosquito-repellent micro / nanofibers and short fiber composite slivers. The short fibers in the mosquito-repellent micro / nanofiber and short fiber composite sliver are one or more natural fibers selected from polylactic acid fiber, lyocell, modal, acetate fiber, bamboo fiber, and high-quality cotton. The mosquito-repellent yarn is spun from a blend of cotton, lyocell, and bamboo fiber. The cotton and lyocell fibers undergo electrospinning to repel mosquitoes; this involves transferring the mosquito-repellent spinning solution into an electrospinning supply system to obtain mosquito-repellent micro / nanofibers. The bamboo fiber is not subjected to this electrospinning treatment. The content of the mosquito-repellent micro / nanofibers is 0.5-10‰ of the weight of the mosquito-repellent yarn. The mosquito-repellent sliver is processed through drawing, roving, spinning, and winding to form the yarn. The mosquito-repellent yarn is spun using a compact spinning method, resulting in a cotton, bamboo, and lyocell mosquito-repellent blended yarn.

2. The method for preparing mosquito-repellent textiles using natural plant extracts according to claim 1, characterized in that, The mosquito-repellent textile is processed through warping, sizing, heddle threading, weaving, and dyeing. The process parameters for the pretreatment and dyeing processes are as follows: caustic soda dosage for pretreatment is 32 g / L, machine speed is 70 m / min, caustic soda concentration for dyeing is 10 g / L, temperature is 125℃, and machine speed is 55 m / min. The process parameters include, but are not limited to, acid and alkali concentration, temperature, and pressure parameters.

3. The method for preparing mosquito-repellent textiles using natural plant extracts according to claim 1, characterized in that, The mosquito-repellent textile is made of knitted jersey fabric using a weft-knitted circular knitting machine.