Preparation process of anti-mosquito fabric and anti-mosquito fabric

Abstract

The preparation process comprises the following preparation processes: S1, extracting an active component of catnip; S2, preparing a molecular nest loaded with the active component of catnip: preparing the molecular nest, and loading an extract of the active component of catnip into the molecular nest; s3, spinning: mixing the fabric base material with the molecular nests loaded with the catnip active ingredients, and preparing yarns containing the catnip active ingredients through a spinning process; and weaving the yarns containing the catnip active component into cloth to obtain the anti-mosquito fabric containing the catnip active component. The fabric is environment-friendly and high in safety and has multiple effects of repelling mosquitoes, resisting bacteria, cooling and the like, catnip active ingredients are loaded through molecular nests, it is ensured that the catnip active ingredients are kept stable in the high-temperature, high-pressure, strong-acid and strong-alkali environments for yarn processing, the catnip active ingredients are prevented from being inactivated, and after the fabric is made, the fabric is comfortable to wear and comfortable to wear. The durability and the stability of the anti-mosquito effect are ensured.

Description

Technical Field

[0001] The present invention relates to the field of textile technology, in particular to mosquito-proof fabric and a preparation process thereof. Background Art

[0002] Mosquito bites not only bring inconvenience to people's lives, but also may spread a variety of diseases. In order to solve the problem of mosquito bites, mosquito-proof functional textiles came into being.

[0003] Mosquito-repellent textiles, an emerging functional fabric product, incorporate mosquito-repellent finishing agents through post-finishing. These finishing agents, based on pyrethroid compounds, utilize microencapsulation technology. Under specific process conditions, they are bonded to the fabric through a fixing agent and other methods, forming a mosquito-repellent film on the surface that is insoluble in water and common organic solvents. This film emits an odor that mosquitoes and flies find offensive, making them reluctant to stay on the coated fabric and quickly flee.

[0004] Although this type of mosquito-proof textile has a certain mosquito repellent effect, it also has some problems: 1. Health risks of chemical mosquito repellents: Existing mosquito-repellent textiles mainly rely on chemical mosquito repellents. Long-term use of chemical mosquito repellents may have adverse effects on the human body and the environment, such as respiratory irritation and skin allergies.

[0005] 2. The anti-mosquito effect is not long-lasting: the effect of chemical mosquito repellents will gradually weaken after repeated washing and requires frequent re-treatment.

[0006] 3. Poor stability: Microencapsulation technology has weak durability and is not resistant to high temperature, strong acid and strong alkali.

[0007] Patent CN105019105A discloses a process for preparing a cooling mint antibacterial fiber fabric. The process involves extracting mint extract, blending it with a spinning solution, and spinning a fabric to create a cooling mint antibacterial fiber fabric. However, this fabric only provides a cooling effect and lacks mosquito repellent properties. Furthermore, the main active ingredient in mint extract is menthol, which evaporates easily when heated. Therefore, the cooling effect of this fiber fabric is short-lived. Summary of the Invention

[0008] In view of the above problems, the object of the present invention is to provide a natural, environmentally friendly and long-lasting mosquito-proof mosquito-proof fabric and a mosquito-proof fabric.

[0009] To achieve the above object, the technical solution proposed by the present invention is as follows: The present invention discloses a preparation process of mosquito-proof fabric, which is characterized by comprising the following preparation process: S1. Extracting catnip active ingredients: a. Pre-treating catnip leaves to obtain catnip leaf powder.

[0010] b. Extract menthol by steam distillation The mint leaf powder is subjected to steam distillation to obtain a distillate and a residue; the distillate contains menthol.

[0011] c. Solvent extraction of nepetalactone The residue is extracted with a solvent to obtain an extract containing nepetalactone.

[0012] d. Purification The distillate is sequentially subjected to oil-water separation, filtration and drying to obtain mint essential oil crystals, and the extract is evaporated and concentrated to obtain nepetalactone concentrate.

[0013] e. Mixing the obtained mint essential oil crystals and nepetalactone concentrate and freeze-drying them to obtain a catnip active ingredient extract.

[0014] S2. Preparation of molecular nests loaded with catnip active ingredients: A molecular nest is prepared, and the catnip active ingredient extract is loaded into the molecular nest.

[0015] S3, Textiles: After mixing the fabric base material with the molecular nest loaded with catnip active ingredients, yarn containing catnip active ingredients is made through a spinning process; the yarn containing catnip active ingredients is woven into cloth to obtain mosquito-proof fabric containing catnip active ingredients.

[0016] In some embodiments, in process d, the distillate obtained in process b is subjected to oil-water separation to obtain mint essential oil and aromatic water, the mint essential oil is purified and freeze-dried to obtain mint essential oil crystals, and the aromatic water is purified and freeze-dried to obtain aromatic water crystals; in process e, the mint essential oil crystals, aromatic water crystals and nepetalactone concentrate are mixed and freeze-dried to obtain a catnip active ingredient extract.

[0017] Wherein, the specific steps of solvent extraction of nepetalactone in process c are: c1. Soak the residue in a solvent at a solid-liquid ratio of 1:4-6 at room temperature for 1.5-2.5 hours. c2. Perform ultrasonic extraction at a power of 200-300W for 12-30 minutes. c3. Filter and collect the extract containing nepetalactone.

[0018] Preferably, the solvent is one of ethyl acetate, ethanol, acetone, n-hexane, and supercritical CO2.

[0019] Preferably, in step a, the process of pre-treating the catnip leaves is as follows: fresh catnip leaves are selected, washed, dried in an oven at 65° C., and then crushed to 80 mesh to obtain catnip leaf powder. In step b, the process of steam distilling the catnip leaf powder is as follows: the catnip leaf powder is placed in a steam distillation extractor, 5 volumes of water are added, and the powder is soaked at room temperature for 1 hour. The powder is then steam distilled at 100° C. for 2 hours, and the water vapor is condensed and collected to obtain a distillate. The residue in the steam distillation extractor is the residue.

[0020] Furthermore, process d is specifically as follows: d1. The distillate obtained in step b is subjected to oil-water separation at 50-60°C to obtain peppermint essential oil and aromatic water, respectively.

[0021] d2. The peppermint essential oil was allowed to stand at 20-25°C for 10-12 hours and then filtered to obtain a peppermint essential oil residue. The peppermint essential oil residue was freeze-dried at -25°C for 3-5 hours to obtain peppermint essential oil crystals.

[0022] d3. The aromatic water is allowed to stand at 3 to 6°C for 10 to 12 hours and then filtered to obtain an aromatic water residue. The aromatic water residue is freeze-dried at -25°C for 3 to 5 hours to obtain aromatic water crystals.

[0023] d4. The nepetalactone extract obtained in step c was concentrated by rotary evaporation until the ethyl acetate was completely evaporated to obtain a nepetalactone concentrate.

[0024] Preferably, in step S2, the steps of preparing the molecular nest loaded with catnip active ingredients include: S21. Mix the following raw materials in parts by weight and then ball-mill them to obtain a mixed powder: activated carbon: 72-88 parts, diatomaceous earth: 11-15 parts, bentonite: 23-28 parts, and xanthan gum: 5-8 parts.

[0025] S22. The following raw materials in parts by weight are mixed and then subjected to ball milling, heating and stirring, and microwave treatment in sequence to obtain porous particles: calcium carbonate: 2.5-3.5 parts, citric acid: 1 part.

[0026] S23. The mixed powder, porous particles, and modifying liquid are mixed and then sequentially stirred, microwaved, filtered, and freeze-dried to obtain molecular nests. The modifying liquid comprises the following components, by weight: 90-110 parts of deionized water, 1.8-2.2 parts of tetrasodium ethylenediaminetetraacetic acid, 1.35-1.65 parts of sodium polyphosphate, 0.9-1.1 parts of alkyl glycoside, 0.45-0.55 parts of polyethylene glycol, and 0.27-0.33 parts of zinc stearate.

[0027] S24. Mix the following parts by weight of catnip active ingredient extract, molecular nests, water-based complex and deionized water, and then perform vacuum stirring and microwave treatment in sequence to obtain molecular nests loaded with catnip active ingredients: catnip active ingredient extract: 11-13 parts, molecular nests: 1-3 parts, water-based complex: 7-9 parts, deionized water: 80-100 parts.

[0028] Preferably, the water-based composite is composed of the following components in parts by weight: 70-90 parts of methyl cellulose, 4-6 parts of hydroxyethyl cellulose, 2-4 parts of polyvinyl alcohol, and 0.5-1.5 parts of sodium dodecylbenzenesulfonate.

[0029] Furthermore, in step S21, the ball-to-material ratio of the ball milling process is 10 to 14:1, the ball milling speed is 260 to 300 rpm, and the ball milling time is 25 to 35 minutes. In some embodiments, the ball-to-material ratio of the ball milling process is preferably 12:1, the ball milling speed is 280 rpm, and the ball milling time is 30 minutes.

[0030] Furthermore, in step S22, the ball-to-material ratio of the ball milling treatment is 8 to 12:1, the ball milling speed is 160 to 200 rpm, and the ball milling time is 10 to 20 minutes; the stirring speed of the heating and stirring treatment is 80 to 120 rpm, the heating temperature is 160°C to 180°C, and the stirring time is 25 to 35 minutes; the microwave power of the microwave treatment is 350W to 450W, and the microwave time is 4 to 6 minutes. In some embodiments, the ball milling treatment is preferably performed by intermittent ball milling, with a 1 minute pause after every 5 minutes of ball milling, the ball-to-material ratio is 10:1, the ball milling speed is 180 rpm, and the ball milling time is 15 minutes; the stirring speed of the heating and stirring treatment is preferably 100 rpm, the heating temperature is 170°C, and the stirring time is 30 minutes; the microwave power of the microwave treatment is preferably 400W, and the microwave time is 5 minutes.

[0031] Furthermore, in step S23, the stirring process has a stirring speed of 70 to 90 rpm, a stirring temperature of 15 to 25° C., and a stirring time of 1 to 2 hours; the microwave power of the microwave treatment is 250 to 350 W, and the microwave time is 8 to 12 minutes; the freezing temperature of the freeze-drying treatment is -15 to -25° C., and the freezing time is 3 to 4 hours. In some embodiments, the stirring process preferably has a stirring speed of 80 rpm, a stirring temperature of 20° C., and a stirring time of 1.5 hours; the microwave power of the microwave treatment preferably has a microwave time of 300 W and a microwave time of 10 minutes; and the freezing temperature of the freeze-drying treatment preferably has a freezing time of -20° C. and a freezing time of 3.5 hours.

[0032] Furthermore, in step S24, the temperature of the vacuum stirring treatment is 16-20° C., the vacuum degree is 0.05-0.07 MPa, the stirring speed is 170-190 rpm, and the stirring time is 1-2 hours; the microwave temperature of the microwave treatment is 2-4° C., the microwave power is 190 W-210 W, and the microwave time is 7-9 minutes. In some embodiments, the temperature of the vacuum stirring treatment is preferably 18° C., the vacuum degree is 0.06 MPa, the stirring speed is 180 rpm, and the stirring time is 1.5 hours; the microwave temperature of the microwave treatment is preferably 3° C., the microwave power is 200 W, and the microwave time is 8 minutes.

[0033] The specific steps of the weaving process S3 are as follows: S31. Select chemical fiber as the fabric base material.

[0034] S32. The molecular nests loaded with catnip active ingredients are evenly mixed into the fabric base material, and primary fibers are prepared through a melt spinning process.

[0035] S33, performing secondary heat drawing and heat setting on the spun fiber to obtain yarn containing catnip active ingredients.

[0036] S34. Weaving yarn containing catnip active ingredients into anti-grain fabric.

[0037] The invention also discloses a mosquito-proof fabric, which is made by the preparation process of the mosquito-proof fabric.

[0038] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The present invention extracts two active ingredients, menthol and nepetalactone, from catnip. Menthol has antibacterial and cooling effects, while nepetalactone has mosquito repellent effect (replacing traditional chemical mosquito repellents). Therefore, the prepared fabric is environmentally friendly and safe, and has multiple functions such as mosquito repellent, antibacterial, and cooling effect.

[0039] 2. The present invention loads catnip active ingredients through molecular nests to ensure that the catnip active ingredients remain stable in the high temperature, high pressure and strong acid and alkali environment of yarn processing, prevent the inactivation of the catnip active ingredients, and after the fabric is made, ensure the durability and stability of the mosquito repellent effect, so that the fabric can maintain stable mosquito repellent performance after multiple washings, reducing the frequency of reprocessing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a preparation flow chart of the present invention.

[0041] Figure 2 This is a schematic diagram of the process of extracting catnip active ingredients in preparation process S1 of the present invention.

[0042] Figure 3This is a schematic diagram of the process of preparing molecular nests loaded with catnip active ingredients in the preparation process S2 of the present invention. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] Examples 1 to 3 like Figure 1 As shown, a preparation process of mosquito-proof fabric includes the following preparation process.

[0045] S1. Extract the active ingredients of catnip, such as Figure 2 As shown, the specific steps include: a. Pre-treating catnip leaves to obtain catnip leaf powder.

[0046] Fresh catnip leaves were selected, washed, dried in an oven at 65° C., and then crushed into 80 meshes to obtain catnip leaf powder.

[0047] b. Extract menthol by steam distillation Catnip leaf powder is steam distilled to obtain a distillate and a residue. The distillate contains menthol, and the residue contains nepetalactone.

[0048] The steam distillation process for catnip leaf powder is as follows: Place the catnip leaf powder in a steam distillation extractor, add 5 times the volume of water, soak at room temperature for 1 hour, then steam distill at 100°C for 2 hours. Condensate and collect the water vapor to obtain a distillate. The residue in the steam distillation extractor is the residue. The menthol in catnip leaves is highly volatile, and steam distillation can effectively remove it.

[0049] c. Solvent extraction of nepetalactone The residue is extracted with a solvent to obtain an extract containing nepetalactone. Nepetalactone has relatively low volatility and can be effectively dissolved from the residue by solvent extraction. The specific steps are: c1. Soak the residue in a solvent at a solid-liquid ratio of 1:4-6 at room temperature for 1.5-2.5 hours. The solvent is one of ethyl acetate, ethanol, acetone, n-hexane, and supercritical CO2. Preferably, the solvent is ethyl acetate.

[0050] c2. Perform ultrasonic extraction at a power of 200-300W for 12-30 minutes.

[0051] c3. Filter and collect the extract containing nepetalactone.

[0052] d. Purification and drying The distillate obtained in step b is sequentially subjected to oil-water separation, filtration, and drying to obtain peppermint essential oil crystals. More preferably, in this embodiment, the distillate obtained in step b is subjected to oil-water separation to obtain peppermint essential oil and aromatic water, the peppermint essential oil is purified and freeze-dried to obtain peppermint essential oil crystals, and the aromatic water is purified and freeze-dried to obtain aromatic water crystals.

[0053] The nepetalactone extract obtained in process c is purified and concentrated to obtain a nepetalactone concentrate.

[0054] The specific steps are: d1. Separate the distillate into oil and water at 55°C to obtain peppermint essential oil and aromatic water, respectively.

[0055] d2. The peppermint essential oil was allowed to stand at 20°C for 10 to 12 hours and then filtered to obtain a peppermint essential oil residue. The peppermint essential oil residue was freeze-dried at -25°C for 3 to 5 hours to obtain peppermint essential oil crystals.

[0056] d3. The aromatic water was allowed to stand at 5°C for 10 to 12 hours and then filtered to obtain aromatic water residue. The aromatic water residue was freeze-dried at -25°C for 3 to 5 hours to obtain aromatic water crystals.

[0057] d4. The nepetalactone extract obtained in step c is concentrated by rotary evaporation until the solvent is completely evaporated to obtain a nepetalactone concentrate.

[0058] e. Obtaining active ingredient extracts The obtained mint essential oil crystals, aromatic water crystals and nepetalactone concentrate are mixed and freeze-dried to obtain a catnip active ingredient extract.

[0059] S2, prepare molecular nests loaded with catnip active ingredients, such as Figure 3 As shown, the specific steps include: S21, after mixing 72-88 parts of activated carbon, 11-15 parts of diatomaceous earth, 23-28 parts of bentonite and 5-8 parts of xanthan gum by weight, ball milling is performed, and the ball-to-material ratio is 10-14:1, the ball milling speed is 260-300rpm, and the ball milling time is 25-35 minutes to obtain a mixed powder. In some embodiments of the present invention, the preferred ball-to-material ratio is 12:1, the ball milling speed is 280rpm, and the ball milling time is 30 minutes. The raw material ratios of the mixed powders of Examples 1-3 are shown in Table 1.

[0060] Table 1 Raw material data of mixed powders of Examples 1 to 3 (unit: parts)

[0061] Activated carbon, with its well-developed microporous structure and large specific surface area, efficiently adsorbs small molecules from gases and liquids. Activated carbon serves as the backbone of molecular nests, providing a porous network and enhancing the material's mechanical strength. Diatomaceous earth, formed from diatom fossils, possesses a naturally occurring hierarchical pore structure (micropores, mesopores, and macropores), which can serve as a template to construct the pore distribution of molecular nests. Diatomaceous earth is also chemically stable and resistant to high temperatures, acids, and alkalis, enhancing the environmental tolerance of molecular nests. Bentonite, primarily composed of montmorillonite and possessing a layered silicate structure, expands upon adsorption of water molecules, filling pores and enhancing the material's structural stability. Bentonite has a strong adsorption capacity for polar molecules (such as water and heavy metal ions), forming a complementary adsorption mechanism with activated carbon. Xanthan gum, a natural high-molecular-weight polysaccharide, forms a viscous colloid when dissolved in water, helping the raw materials mix evenly and bond into a stable three-dimensional network.

[0062] S22, mixing 2.5 to 3.5 parts by weight of calcium carbonate and 1 part of citric acid, and then sequentially subjecting the mixture to ball milling, heating and stirring, and microwave treatment to obtain porous particles. The specific steps are: 2.5-3.5 parts of calcium carbonate and 1 part of citric acid are added to a ball mill and ball milled at a ball-to-material ratio of 8-12:1, a ball milling speed of 160-200 rpm, and a ball milling time of 10-20 minutes. In some embodiments of the present invention, the ball milling is preferably performed intermittently, with a 1-minute pause after every 5 minutes of ball milling, a ball milling speed of 180 rpm, and a ball milling time of 15 minutes. After the ball milling treatment is completed, a heating and stirring treatment is performed at a stirring speed of 80-120 rpm, a heating temperature of 160°C to 180°C, and a stirring time of 25-35 minutes. In some embodiments of the present invention, the stirring speed is preferably 100 rpm, the heating temperature is 170°C, and the stirring time is 30 minutes. After the heating and stirring treatment is completed, a microwave treatment is performed at a microwave power of 350W to 450W and a microwave time of 4-6 minutes. In some embodiments of the present invention, the microwave power is preferably 400W and the microwave time is 5 minutes. After the microwave treatment, the mixture is cooled to room temperature to obtain porous particles.

[0063] The raw material ratios of the porous particles of Examples 1 to 3 are shown in Table 2.

[0064] Table 2 Raw material data of porous particles of Examples 1 to 3 (unit: parts)

[0065] S23, mixing the mixed powder, porous particles and modified liquid, and then stirring, microwave, filtering and freeze drying in sequence to obtain molecular nests. The specific steps are: After mixing the mixed powder, porous particles and modified liquid, stirring treatment is carried out at a stirring speed of 70 to 90 rpm, a stirring temperature of 15 to 25° C., and a stirring time of 1 to 2 hours. In some embodiments of the present invention, the preferred stirring speed is 80 rpm, the stirring temperature is 20° C., and the stirring time is 1.5 hours. After the stirring treatment is completed, microwave treatment is carried out at a microwave power of 250 to 350 W and a microwave time of 8 to 12 minutes. In some embodiments of the present invention, the preferred microwave power is 300 W and the microwave time is 10 minutes. After the microwave treatment is completed, freeze drying treatment is carried out at a freezing temperature of -15 to -25° C. and a freezing time of 3 to 4 hours. In some embodiments of the present invention, the preferred freezing temperature is -20° C. and the freezing time is 3.5 hours.

[0066] The modified solution is composed of the following ingredients, measured by weight: 90-110 parts deionized water, 1.8-2.2 parts tetrasodium EDTA, 1.35-1.65 parts sodium polyphosphate, 0.9-1.1 parts alkyl glycoside, 0.45-0.55 parts polyethylene glycol, and 0.27-0.33 parts zinc stearate. The raw material ratios of the modified solutions of Examples 1-3 are shown in Table 3.

[0067] Table 3 Raw material data of the modified liquids of Examples 1 to 3 (unit: parts)

[0068] S24, mixing 11-13 parts by weight of catnip active ingredient extract, 1-3 parts of molecular nests, 7-9 parts of water-based complex, and 80-100 parts of deionized water, followed by vacuum stirring and microwave treatment, to obtain molecular nests loaded with catnip active ingredients. The specific steps are: After mixing the catnip active ingredient extract, molecular nest, water-based complex and deionized water, vacuum stirring treatment is performed. The vacuum stirring treatment temperature is 16-20°C, the vacuum degree is 0.05-0.07MPa, the stirring speed is 170-190rmp, and the stirring time is 1-2 hours. In some embodiments of the present invention, the preferred stirring temperature is 18°C, the vacuum degree is 0.06MPa, the stirring speed is 180rmp, and the stirring time is 1.5 hours. After the vacuum stirring is completed, microwave treatment is performed, the microwave temperature is 2-4°C, the microwave power is 190W-210W, and the microwave time is 7-9 minutes. In some embodiments of the present invention, the microwave temperature is 3°C, the microwave power is 200W, and the microwave time is 8 minutes. After the microwave treatment is completed, a molecular nest loaded with catnip active ingredients is obtained.

[0069] The raw material ratios of the molecular nests loaded with catnip active ingredients in Examples 1 to 3 are shown in Table 4.

[0070] Table 4 Raw material data of molecular nests loaded with catnip active ingredients (unit: parts)

[0071] The water-based compound is composed of the following ingredients, calculated by weight: 70-90 parts methylcellulose, 4-6 parts hydroxyethyl cellulose, 2-4 parts polyvinyl alcohol, and 0.5-1.5 parts sodium dodecylbenzenesulfonate. The water-based compound can improve the adsorption of catnip active ingredients by the molecular nest and enhance their stability.

[0072] The raw material ratios of the water-based composites of Examples 1 to 3 are shown in Table 5.

[0073] Table 5 Raw material data of the water-based composites of Examples 1 to 3 (unit: parts)

[0074] The molecular sieve prepared by the present invention has good compatibility with the catnip active ingredient and can improve the effect of loading the catnip active ingredient.

[0075] S3, Textile The specific steps include: S31. Select chemical fiber as fabric base material Chemical fiber can be polyester, spandex, nylon, etc. In this embodiment, the chemical fiber is polyester fiber, which ensures the comfort and breathability of the fabric.

[0076] S32. The molecular nests loaded with catnip active ingredients are evenly mixed into the fabric base material, and primary fibers are prepared through a melt spinning process.

[0077] S33, performing secondary heat drawing and heat setting on the spun fiber to obtain a high-strength and high-modulus polyester yarn containing catnip active ingredients; S34. Yarn containing catnip active ingredients is woven into anti-grain fabric. During the weaving process, the catnip active ingredients are ensured to be evenly distributed in the fabric, thereby improving the consistency of the anti-mosquito effect.

[0078] The mosquito-proof fabric and its preparation process according to the embodiment of the present invention have the following advantages: 1. Catnip is a perennial upright herb of the Lamiaceae family and the genus Nepeta. Catnip volatile oil has significant pharmacological effects on the central nervous system, digestive system, and respiratory system, and has a certain inhibitory effect on bacteria. The main components of its volatile oil are terpenes, from which nepetalactone, an active mosquito repellent ingredient, can be isolated and extracted. Studies have shown that the mosquito repellent activity of nepetalactone is 10 times that of DEET. At the same time, toxicity evaluation experiments have shown that catnip volatile oil is non-toxic and non-irritating to the skin and non-allergenic. The present invention replaces traditional chemical mosquito repellents with catnip active ingredients, giving fabrics safety and environmental protection, as well as multiple functions such as mosquito repellency, antibacterial, and cooling, providing more comprehensive protection.

[0079] 2. By loading catnip active ingredients into molecular nests to participate in spinning, it is possible to solve the problem of easy volatility and thermal decomposition of catnip active ingredients in high temperature, high pressure and strong acid and alkali environments during the melt spinning stage, thereby preventing the inactivation of catnip active ingredients.

[0080] 3. Molecular nest can release catnip active ingredients in a long-term sustained manner, ensuring the durability and stability of the anti-mosquito effect, thereby reducing the frequency of re-treatment.

[0081] 4. The preparation process of the mosquito-proof fabric of the present invention is applicable to a variety of fiber yarns, and can provide a wider range of application scenarios and choices.

[0082] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A preparation process for mosquito-proof fabric, characterized in that: The preparation process includes the following: S1. Extracting catnip active ingredients: a. Pre-treating catnip leaves to obtain catnip leaf powder; b. Extract menthol by steam distillation The catnip leaf powder is subjected to steam distillation to obtain a distillate and a residue; the distillate contains menthol; c. Solvent extraction of nepetalactone extracting the residue with a solvent to obtain an extract containing nepetalactone; d. Purification The distillate is sequentially subjected to oil-water separation, filtration and drying to obtain mint essential oil crystals, and the extract is evaporated and concentrated to obtain nepetalactone concentrate; e. mixing the mint essential oil crystals and the nepetalactone concentrate and freeze-drying the mixture to obtain a catnip active ingredient extract; S2. Preparation of molecular nests loaded with catnip active ingredients: preparing a molecular nest, and loading the catnip active ingredient extract into the molecular nest; S3, Textiles: After mixing the fabric base material with the molecular nest loaded with catnip active ingredients, yarn containing catnip active ingredients is made through a spinning process; the yarn containing catnip active ingredients is woven into cloth to obtain mosquito-proof fabric containing catnip active ingredients.

2. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: The solvent is one of ethyl acetate, ethanol, acetone, n-hexane, and supercritical CO2.

3. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: In process d, the distillate obtained in process b is subjected to oil-water separation to obtain mint essential oil and aromatic water, the mint essential oil is purified and freeze-dried to obtain mint essential oil crystals, and the aromatic water is purified and freeze-dried to obtain aromatic water crystals; in process e, the mint essential oil crystals, aromatic water crystals and nepetalactone concentrate are mixed and freeze-dried to obtain a catnip active ingredient extract.

4. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: The specific steps of solvent extraction of nepetalactone in process c are: c1. Soak the residue in a solvent at a material-liquid ratio of 1:4 to 6 at room temperature for 1.5 to 2.5 hours; c2 ultrasonic extraction, ultrasonic power of 200 ~ 300W, time is 12 ~ 30 minutes; c3. Filter and collect the extract containing nepetalactone.

5. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: In the process a, the process of pre-treating catnip leaves is as follows: fresh catnip leaves are selected, washed, dried in an oven at 65°C, and then crushed to 80 mesh to obtain catnip leaf powder; The process of steam distilling catnip leaf powder in process b is as follows: placing the catnip leaf powder in a steam distillation extractor, adding 5 times the volume of water, soaking it at room temperature for 1 hour, steam distilling it at 100° C. for 2 hours, condensing and collecting the water vapor to obtain a distillate, and the residue in the steam distillation extractor is the residue.

6. The preparation process of the mosquito-proof fabric according to claim 3, characterized in that: The specific process d is: d1. The distillate was separated into oil and water at 50-60 ° C to obtain peppermint essential oil and aromatic water respectively; d2 The peppermint essential oil was allowed to stand at 20 to 25 ℃ for 10 to 12 hours and filtered to obtain a mint essential oil residue, the mint essential oil residue was freeze-dried at -25 ℃ for 3 to 5 hours to obtain mint essential oil crystals; d3. The aromatic water was allowed to stand at 3 to 6 ℃ for 10 to 12 hours and then filtered to obtain aromatic water residue. The aromatic water residue was freeze-dried at -25 ℃ for 3 to 5 hours to obtain aromatic water crystals. d4. The nepetalactone extract obtained in step c was concentrated by rotary evaporation until the ethyl acetate was completely evaporated to obtain a nepetalactone concentrate.

7. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: In step S2, the steps of preparing the molecular nest loaded with catnip active ingredients include: S21, mixing the following raw materials in parts by weight and then ball milling to obtain mixed powder: Activated carbon: 72-88 parts Diatomaceous earth: 11-15 parts Bentonite: 23-28 parts Xanthan gum: 5-8 parts S22. The following raw materials in parts by weight are mixed and then subjected to ball milling, heating and stirring, and microwave treatment in sequence to obtain porous particles: Calcium carbonate: 2.5-3.5 parts Citric acid: 1 part S23, mixing the mixed powder, porous particles and modified liquid, and then stirring, microwave, filtering and freeze-drying in sequence to obtain molecular nests; the modified liquid is composed of the following components in parts by weight: Deionized water: 90-110 parts Tetrasodium EDTA: 1.8-2.2 parts Sodium polyphosphate: 1.35-1.65 parts Alkyl glycoside: 0.9-1.1 parts Polyethylene glycol: 0.45-0.55 parts Zinc stearate: 0.27-0.33 parts S24. Mix the following parts by weight of catnip active ingredient extract, molecular nests, water-based complex, and deionized water, and sequentially perform vacuum stirring and microwave treatment to obtain molecular nests loaded with catnip active ingredients: Catnip active ingredient extract: 11-13 parts Molecular nest: 1 to 3 copies Water-based compound: 7-9 parts Deionized water: 80-100 parts.

8. The preparation process of the mosquito-proof fabric according to claim 7, characterized in that: The water-based composite material is composed of the following components in parts by weight: 70-90 parts of methylcellulose 4-6 parts of hydroxyethyl cellulose 2-4 parts polyvinyl alcohol 0.5-1.5 parts of sodium dodecylbenzenesulfonate.

9. The preparation process of the mosquito-proof fabric according to claim 7, characterized in that: In the step S21, the ball-to-material ratio of the ball milling treatment is 10-14:1, the ball milling speed is 260-300 rpm, and the ball milling time is 25-35 minutes; In the step S22, the ball-to-material ratio of the ball milling treatment is 8 to 12:1, the ball milling speed is 160 to 200 rpm, and the ball milling time is 10 to 20 minutes; the stirring speed of the heating and stirring treatment is 80 to 120 rpm, the heating temperature is 160° C. to 180° C., and the stirring time is 25 to 35 minutes; the microwave power of the microwave treatment is 350 W to 450 W, and the microwave time is 4 to 6 minutes; In step S23, the stirring speed of the stirring treatment is 70 to 90 rpm, the stirring temperature is 15 to 25° C., and the stirring time is 1 to 2 hours; the microwave power of the microwave treatment is 250 to 350 W, and the microwave time is 8 to 12 minutes; the freezing temperature of the freeze-drying treatment is -15 to -25° C., and the freezing time is 3 to 4 hours; In the step S24, the temperature of the vacuum stirring treatment is 16-20°C, the vacuum degree is 0.05-0.07 MPa, the stirring speed is 170-190 rpm, and the stirring time is 1-2 hours; the microwave temperature of the microwave treatment is 2-4°C, the microwave power is 190W-210W, and the microwave time is 7-9 minutes.

10. The preparation process of the mosquito-proof fabric according to claim 1, characterized in that: The specific steps of the weaving process S3 are: S31, selecting chemical fiber as the fabric base material; S32, uniformly mixing the molecular nest loaded with catnip active ingredients into a fabric base material, and forming a nascent fiber through a melt spinning process; S33, performing secondary heat drawing and heat setting on the spun fiber to obtain a yarn containing catnip active ingredient; S34. Weaving yarn containing catnip active ingredients into mosquito-proof fabric.

11. A mosquito-proof fabric, characterized in that: The mosquito-proof fabric is made by the preparation process of any one of claims 1 to 10.

Images