Application of essential oil microcapsule in mosquito-repellent fabric and preparation method of mosquito-repellent fabric

Abstract

The invention belongs to the technical field of textile materials, and particularly relates to application of essential oil microcapsules in mosquito-repellent fabric and a preparation method of the mosquito-repellent fabric. The invention provides application of an essential oil microcapsule in a mosquito repelling fabric. The essential oil microcapsule comprises essential oil and a shell material wrapping the surface of the essential oil, the essential oil comprises mugwort oil, lavender oil or peppermint oil. The natural plant extract is used as the mosquito repellent, so that the mosquito repellent is safer and more environment-friendly. Furthermore, the invention also provides a preparation method of the mosquito-repellent fabric. Different preparation processes are adopted for different fiber materials, mosquito repelling components and fabric fibers can be effectively combined, and the durability of the mosquito repelling effect is improved; meanwhile, the fabric keeps the original air permeability and comfort, and is suitable for being used in home life, travel and other scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of textile materials, and particularly relates to application of essential oil microcapsules in mosquito repellent fabrics and a preparation method of the mosquito repellent fabrics. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for textiles and clothing. While ensuring their comfort, they also need to add some special functions, such as antibacterial and mosquito repellent, to solve the problem of more insects and ants in the hot summer or outdoor activities, which are easy to breed bacteria and cause certain harm to human health.

[0003] There are many methods of repelling and killing insects and ants in the prior art, such as mosquito coils, various insecticides or floral water, but mosquito coils contain anesthetic substances, the chemical substances in insecticides exceed the standard, and the effect of floral water is not long-lasting and is easy to be allergic. There are many mosquito repellent fabrics on the market, but most of them use chemically synthesized mosquito repellent ingredients, which may cause potential harm to the human body and the environment, and it is difficult to ensure their safety, and they cannot meet the current consumer demand for healthy, green and natural products. Summary of the invention

[0004] The purpose of the present invention is to provide an application of essential oil microcapsules in mosquito repellent fabrics and a preparation method of mosquito repellent fabrics. The present invention applies essential oils to mosquito repellent fabrics, which is safer and more environmentally friendly.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides an application of an essential oil microcapsule in a mosquito repellent fabric, wherein the essential oil microcapsule comprises an essential oil and a shell material wrapped on the surface of the essential oil;

[0007] The essential oils include mugwort oil, lavender oil or peppermint oil.

[0008] Preferably, the shell material includes chitosan, sodium alginate / chitosan quaternary ammonium salt or β-cyclodextrin.

[0009] Preferably, the essential oil microcapsules include chitosan encapsulated artemisia oil, β-cyclodextrin encapsulated lavender oil or sodium alginate / chitosan quaternary ammonium salt encapsulated peppermint oil.

[0010] The present invention also provides a method for preparing a mosquito repellent fabric.

[0011] When the substrate of the mosquito repellent fabric is a natural fiber fabric, the preparation method comprises the following steps:

[0012] mixing the essential oil microcapsules, the cross-linking agent, the catalyst, the penetrant and water to obtain a finishing solution;

[0013] After the natural fiber fabric is immersed in the finishing liquid, heat treatment is performed to obtain the mosquito repellent fabric;

[0014] When the substrate of the mosquito repellent fabric is a chemical fiber material, the preparation method comprises the following steps:

[0015] The chemical fiber material and the essential oil microcapsules are mixed and granulated by melt extrusion to obtain a masterbatch;

[0016] The masterbatch and chemical fiber material are mixed and melt-blended and spun to obtain mosquito repellent fiber;

[0017] The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

[0018] Preferably, the natural fiber fabric includes cotton or linen; the cross-linking agent includes 2D resin, the catalyst includes magnesium chloride, and the penetrant includes JFC penetrant.

[0019] Preferably, the finishing liquid comprises the following ingredients: 5-60 g / L of essential oil microcapsules, 40-210 g / L of a cross-linking agent, 8-30 g / L of a catalyst, and 2-20 g / L of a penetrant.

[0020] Preferably, the bath ratio of the immersion is 1:30, the immersion temperature is 40-45° C., and the immersion time is 0.5-1 h.

[0021] Preferably, the heat treatment temperature is 80° C. and the time is 3 minutes.

[0022] Preferably, the chemical fiber material includes polypropylene or polyester.

[0023] Preferably, the mass percentage of the essential oil microcapsules in the masterbatch is 18-25%; the mass percentage of the essential oil microcapsules in the mosquito repellent fiber is 2-5%.

[0024] The present invention provides an application of an essential oil microcapsule in a mosquito repellent fabric, wherein the essential oil microcapsule comprises an essential oil and a shell material wrapped on the surface of the essential oil; the essential oil comprises mugwort oil, lavender oil or peppermint oil. The present invention uses natural plant extracts as mosquito repellents, which is safer and more environmentally friendly.

[0025] The present invention also provides a method for preparing a mosquito-repellent fabric. When the substrate of the mosquito-repellent fabric is a natural fiber fabric, the preparation method comprises the following steps: mixing essential oil microcapsules, a crosslinking agent, a catalyst, a penetrant and water to obtain a finishing solution; after the natural fiber fabric is immersed in the finishing solution, heat treatment is performed to obtain the mosquito-repellent fabric; when the substrate of the mosquito-repellent fabric is a chemical fiber material, the preparation method comprises the following steps: mixing the chemical fiber material and the essential oil microcapsules, and granulating by melt extrusion to obtain a master batch; mixing the master batch and the chemical fiber material, and performing melt blending spinning to obtain mosquito-repellent fiber; weaving the mosquito-repellent fiber to obtain the mosquito-repellent surface. The present invention adopts different preparation processes for different fiber materials, can effectively combine the mosquito-repellent component with the fabric fiber, and improves the durability of the mosquito-repellent effect; at the same time, the fabric retains the original air permeability and comfort, and is more suitable for summer wear and outdoor use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the SEM image of the essential oil microcapsules obtained in Example 1;

[0027] Figure 2 This is a diagram showing the release of essential oil microcapsules from the mosquito repellent fabric obtained in Example 4 during the heating process. DETAILED DESCRIPTION

[0028] The present invention provides an application of an essential oil microcapsule in a mosquito repellent fabric, wherein the essential oil microcapsule comprises an essential oil and a shell material wrapped on the surface of the essential oil;

[0029] The essential oils include mugwort oil, lavender oil or peppermint oil.

[0030] In the present invention, the shell material preferably includes chitosan, sodium alginate / chitosan quaternary ammonium salt or β-cyclodextrin.

[0031] In the present invention, the essential oil microcapsules preferably include chitosan encapsulated artemisia oil, β-cyclodextrin encapsulated lavender oil or sodium alginate / chitosan quaternary ammonium salt encapsulated peppermint oil.

[0032] In the present invention, the method for preparing chitosan-encapsulated mugwort oil preferably comprises the following steps:

[0033] Mix mugwort oil and chitosan to obtain colostrum;

[0034] The colostrum, Span 80 and liquid paraffin are mixed to obtain a double emulsion;

[0035] The glutaraldehyde solution is dropped into the multiple emulsion for solidification to obtain the chitosan-coated mugwort oil.

[0036] In the present invention, the mass ratio of the mugwort oil to chitosan is preferably 1:20. In the present invention, the mugwort oil and chitosan are mixed under stirring, and the stirring temperature is preferably 30-40°C.

[0037] In the present invention, the mass ratio of colostrum, Span 80 and liquid paraffin is preferably 100:1:1000. In the present invention, the mixing of colostrum, Span 80 and liquid paraffin is preferably carried out under stirring, and the stirring temperature is preferably 50-60°C.

[0038] In the present invention, the mass concentration of the glutaraldehyde solution is preferably 14%, and the mass of the glutaraldehyde solution preferably accounts for 1-10% of the mass of the multiple emulsion.

[0039] In the present invention, the curing temperature is preferably 30-35° C., and the curing time is preferably 1 hour.

[0040] After the solidification, the present invention also preferably includes isolating, drying and grinding the obtained system.

[0041] In the present invention, the preparation method of β-cyclodextrin-encapsulated lavender oil preferably comprises the following steps:

[0042] providing a supersaturated solution of β-cyclodextrin;

[0043] The lavender oil is dissolved in ethanol, and is added dropwise to the supersaturated β-cyclodextrin solution under stirring and continuously stirred, followed by sequential refrigeration and separation, and the separated solid is dried to obtain the β-cyclodextrin-encapsulated lavender oil.

[0044] In the present invention, the process of providing a supersaturated solution of β-cyclodextrin preferably comprises: placing β-cyclodextrin in deionized water for heating and stirring. In the present invention, the mass ratio of β-cyclodextrin to deionized water is preferably 1:10. In the present invention, the temperature of the heating and stirring is preferably 70°C, the time is preferably 2h, and the rotation speed is preferably 200rpm.

[0045] In the present invention, the mass ratio of the lavender essential oil to ethanol is preferably 1:10; the mass ratio of the lavender essential oil to β-cyclodextrin is preferably 6:1. In the present invention, the temperature of the system during the dropwise addition is preferably 40°C, the rotation speed of the stirring and continuous stirring is preferably 1000rpm, and the continuous stirring time is preferably 2h. In the present invention, the temperature of the refrigeration is preferably 3-4°C, and the time is preferably 24h. In the present invention, the system is stratified after refrigeration, the upper layer is a clear liquid, and the lower layer solid is β-cyclodextrin encapsulated lavender oil. In the present invention, the separation method is preferably vacuum filtration; after the separation, it is also preferably included to wash the obtained solid with water, and the number of water washings is preferably 3 times. In the present invention, the drying method is preferably freeze-drying, and the freeze-drying time is preferably 12h.

[0046] In the present invention, the preparation method of sodium alginate / chitosan quaternary ammonium salt-encapsulated peppermint oil preferably comprises the following steps:

[0047] placing sodium alginate in deionized water and heating and stirring to obtain a sodium alginate solution;

[0048] The chitosan quaternary ammonium salt is placed in an acetic acid aqueous solution and stirred to dissolve to obtain a chitosan quaternary ammonium salt solution;

[0049] adding an emulsifier and peppermint oil to the sodium alginate solution in sequence and homogenizing the solution to obtain an oil-in-water emulsion;

[0050] Under stirring conditions, dropping the oil-in-water emulsion into the chitosan quaternary ammonium salt solution, adjusting the pH value of the system to acidic and continuously stirring to obtain a mixed system;

[0051] The calcium chloride solution is added dropwise to the mixed system for cross-linking and curing to obtain the sodium alginate / chitosan quaternary ammonium salt-encapsulated peppermint oil.

[0052] In the present invention, the temperature of the heating and stirring is preferably 50° C., and the time is preferably 4 hours. In the present invention, the mass concentration of the sodium alginate solution is preferably 1.5%.

[0053] In the present invention, the mass concentration of the acetic acid aqueous solution is preferably 1%. In the present invention, the stirring and dissolving time is preferably 4 hours. In the present invention, the mass concentration of the chitosan quaternary ammonium salt in the chitosan quaternary ammonium salt solution is preferably 0.75%.

[0054] In the present invention, the emulsifier preferably includes Tween-80, the volume ratio of the emulsifier to the sodium alginate solution is preferably 1:100, and the volume ratio of the peppermint oil to the sodium alginate solution is preferably 1:100. In the present invention, the homogenization speed is preferably 8000 rpm, and the time is preferably 20 min.

[0055] In the present invention, the volume ratio of the oil-in-water emulsion to the chitosan quaternary ammonium salt solution is preferably 1:20; and the stirring speed is preferably 1000 rpm.

[0056] In the present invention, the acidic pH value is preferably 4 to 6, and more preferably 5.0 ± 0.5. In the present invention, the reagent used for adjusting the pH value is preferably 5 wt% sodium hydroxide solution; the speed of the continuous stirring is preferably 1000 rpm, the temperature is preferably room temperature, and the time is preferably 30 minutes.

[0057] In the present invention, the concentration of the calcium chloride solution is preferably 1.5%, and the volume ratio of the calcium chloride solution to the mixed system is preferably 1:50. In the present invention, the temperature of the cross-linking curing is preferably 50-70°C, and the time is preferably 4 hours. After the cross-linking curing, the present invention also preferably includes washing and drying the obtained solid, the number of washings is preferably 3 times, the drying method is preferably freeze drying, and the freeze drying time is preferably 12 hours.

[0058] The invention also provides a method for preparing the mosquito repellent fabric.

[0059] In the present invention, the base material of the mosquito repellent fabric includes natural fiber fabric or chemical fiber material.

[0060] In the present invention, when the substrate of the mosquito repellent fabric is a natural fiber fabric, the preparation method comprises the following steps:

[0061] mixing the essential oil microcapsules, the cross-linking agent, the catalyst, the penetrant and water to obtain a finishing solution;

[0062] The natural fiber fabric is immersed in the finishing liquid and then subjected to heat treatment to obtain the mosquito repellent fabric.

[0063] In the present invention, the natural fiber fabric preferably includes cotton or linen. In the present invention, the cross-linking agent preferably includes 2D resin, the catalyst preferably includes magnesium chloride, and the penetrant preferably includes JFC penetrant. In the present invention, the finishing liquid preferably includes the following ingredients: 5-60 g / L of essential oil microcapsules, 40-210 g / L of cross-linking agent, 8-30 g / L of catalyst, and 4-25 g / L of penetrant.

[0064] Before the immersion, the present invention also preferably includes pre-treating the natural fiber fabric, and the pre-treatment preferably includes: soaking the natural fiber fabric in deionized water, rinsing it under running water, and drying it for later use. In the present invention, the immersion time is preferably 30 minutes.

[0065] In the present invention, the bath ratio of the impregnation is preferably 1:30, the temperature of the impregnation is preferably 40-45°C, and the time is preferably 0.5-1h. In the present invention, the temperature of the heat treatment is preferably 80°C, and the time is preferably 3min. After the heat treatment, the present invention also preferably includes drying the obtained fabric at room temperature.

[0066] In the present invention, when the substrate of the mosquito repellent fabric is a chemical fiber material, the preparation method comprises the following steps:

[0067] The chemical fiber material and the essential oil microcapsules are mixed and granulated by melt extrusion to obtain a masterbatch;

[0068] The masterbatch and chemical fiber material are mixed and melt-blended and spun to obtain mosquito repellent fiber;

[0069] The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

[0070] In the present invention, the chemical fiber material preferably includes polypropylene or polyester.

[0071] The present invention has no special limitation on the process of melt extrusion granulation, and it can be adopted by those skilled in the art. In the present invention, the mass percentage of the essential oil microcapsules in the masterbatch is preferably 18-25%. The present invention has no special limitation on the process of melt blending spinning, and it can be adopted by those skilled in the art. In the present invention, the mass percentage of the essential oil microcapsules in the mosquito repellent fiber is preferably 2-5%. The present invention has no special limitation on the weaving process, and it can be adopted by those skilled in the art.

[0072] Unless otherwise specified, the materials and equipment used in the present invention are all commercially available products in the art.

[0073] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] Example 1

[0075] Artemisia oil and chitosan were mixed in a mass ratio of 1:20, and stirred at 35°C to obtain colostrum;

[0076] The colostrum, Span 80 and liquid paraffin obtained above were mixed in a ratio of 100:1:1000, and stirred at 50°C to obtain a complex emulsion;

[0077] A glutaraldehyde solution with a mass concentration of 14% is dropped into the emulsion for solidification, wherein the mass of the glutaraldehyde solution accounts for 10% of the mass of the emulsion, the solidification temperature is 32° C., and the time is 1 hour. After the solidification is completed, the obtained system is separated, dried and ground to obtain chitosan-encapsulated artemisia oil.

[0078] Example 2

[0079] Prepare a supersaturated solution of β-cyclodextrin (β-CD): accurately weigh 10 g of β-CD and add it to 100 mL of deionized water. Stir the mixture at 70°C and 200 r / min for 2 h to fully dissolve the mixture and form a supersaturated solution of β-CD.

[0080] Accurately weigh 0.6 g of lavender essential oil, dissolve it in anhydrous ethanol at a mass ratio of 1:10, add the obtained solution dropwise to the β-CD supersaturated solution at a constant temperature of 40°C, wherein the mass ratio of β-CD to lavender essential oil is 1:6, and mix on a magnetic stirrer at a speed of 1000 r / min for 2 h; after stirring, put the mixed product into a refrigerator at 3-4°C for 24 h;

[0081] After refrigeration, the mixture was stratified, with the upper layer being a clear liquid and the lower layer being a milky white solid which was β-cyclodextrin-encapsulated lavender oil; a precipitate was obtained by vacuum filtration, and the precipitate was then washed with deionized water and vacuum filtered, and this process was repeated three times; finally, the washed precipitate was freeze-dried in a freeze dryer for 12 hours, and the white powder obtained was β-cyclodextrin-encapsulated lavender oil, recorded as MC, and the powder was sealed and stored for later use.

[0082] Example 3

[0083] Prepare a 1.5% sodium alginate solution: accurately weigh 1.5 g of sodium alginate and place it in 100 mL of deionized water. Stir it in a constant temperature water bath at 50°C for 4 hours to fully dissolve it.

[0084] Prepare a 0.75% chitosan quaternary ammonium salt aqueous solution: first prepare a 1% acetic acid aqueous solution, then accurately weigh 2.25g chitosan quaternary ammonium salt and add it to 300mL acetic acid aqueous solution, and stir it magnetically for 4h to fully dissolve it;

[0085] Take 100 mL of sodium alginate aqueous solution, add 1 mL of Tween-80 emulsifier, stir evenly, and then slowly drop 1 mL of peppermint oil into the sodium alginate solution; use a homogenizer to high-speed shear the mixture at a speed of 8000 r / min for 20 minutes to emulsify the peppermint oil evenly in the sodium alginate solution to obtain an oil-in-water emulsion;

[0086] 300 mL of chitosan quaternary ammonium salt aqueous solution was placed in a three-necked flask, and the oil-in-water emulsion was added dropwise into the chitosan quaternary ammonium salt solution while stirring at a speed of 1000 r / min; then the solution pH was adjusted to 5.0 with a 5wt% sodium hydroxide solution, and stirred at room temperature for 30 min to obtain a mixed system;

[0087] 30 mL of 1.5% calcium chloride solution was added dropwise to the mixed system, and the mixture was reacted in a 50°C water bath for 4 hours to perform cross-linking and curing. The obtained microcapsule suspension was centrifuged and washed three times, and freeze-dried for 12 hours to obtain sodium alginate / chitosan quaternary ammonium salt-encapsulated peppermint oil.

[0088] Example 4

[0089] Soak the cotton cloth in deionized water for 30 minutes to remove impurities on the cotton cloth, then wash it under running water, dry it and set it aside to obtain the pretreated cotton cloth;

[0090] Prepare finishing liquid: chitosan-coated mugwort oil 60 g / L obtained in Example 1, 2D resin 100 g / L, magnesium chloride 8 g / L and JFC penetrant 20 g / L;

[0091] The pretreated cotton cloth was immersed in the above finishing liquid with a bath ratio of 1:30, an immersion time of 1 hour, and an immersion temperature of 40°C. The finished cotton cloth was then baked at 80°C for 3 minutes and dried at room temperature to obtain a mosquito repellent fabric.

[0092] Example 5

[0093] Soak the cotton cloth in deionized water for 30 minutes to remove impurities on the cotton cloth, then wash it under running water, dry it and set it aside to obtain the pretreated cotton cloth;

[0094] Prepare finishing liquid: 40 g / L lavender oil, 150 g / L 2D resin, 30 g / L magnesium chloride and 2 g / L JFC penetrant coated with β-cyclodextrin obtained in Example 2;

[0095] The pretreated cotton cloth was immersed in the above finishing liquid with a bath ratio of 1:30, an immersion time of 1 hour, and an immersion temperature of 40°C. The finished cotton cloth was then baked at 80°C for 3 minutes and dried at room temperature to obtain a mosquito repellent fabric.

[0096] Example 6

[0097] Soak the cotton cloth in deionized water for 30 minutes to remove impurities on the cotton cloth, then wash it under running water, dry it and set it aside to obtain the pretreated cotton cloth;

[0098] Prepare finishing liquid: sodium alginate / chitosan quaternary ammonium salt obtained in Example 3, mint oil 40 g / L, 2D resin 200 g / L, magnesium chloride 30 g / L and JFC penetrant 2 g / L;

[0099] The pretreated cotton cloth was immersed in the above finishing liquid with a bath ratio of 1:30, an immersion time of 1 hour, and an immersion temperature of 40°C. The finished cotton cloth was then baked at 80°C for 3 minutes and dried at room temperature to obtain a mosquito repellent fabric.

[0100] Example 7

[0101] The polypropylene and the chitosan-coated mugwort oil obtained in Example 1 were mixed, and granulated by melt extrusion to obtain a masterbatch with a mass fraction of 20 wt %;

[0102] The masterbatch and polypropylene are mixed and melt-blended to obtain mosquito repellent fibers, wherein the mass fraction of chitosan-wrapped mugwort oil in the mosquito repellent fibers is 2 wt %;

[0103] The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

[0104] Example 8

[0105] Polypropylene and the β-cyclodextrin-encapsulated lavender oil obtained in Example 2 were mixed, and granulated by melt extrusion to obtain a masterbatch with a mass fraction of 20 wt%;

[0106] The masterbatch is mixed with polypropylene, and melt-blended and spun to obtain mosquito repellent fiber, wherein the mass fraction of β-cyclodextrin-encapsulated lavender oil in the mosquito repellent fiber is 2 wt %;

[0107] The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

[0108] Example 9

[0109] The polyester and the sodium alginate / chitosan quaternary ammonium salt-coated peppermint oil obtained in Example 3 were mixed, and granulated by melt extrusion to obtain a masterbatch with a mass fraction of 20 wt %;

[0110] The masterbatch and polyester are mixed and melt-blended to obtain mosquito repellent fiber, wherein the mass fraction of sodium alginate / chitosan quaternary ammonium salt-encapsulated peppermint oil in the mosquito repellent fiber is 2wt%;

[0111] The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

[0112] Performance Testing

[0113] Test Example 1

[0114] Figure 1 The SEM images of the microcapsules obtained in Example 1 are shown in Figure 1, where the left image is magnified 5000 times and the right image is magnified 10000 times. Figure 1 It can be seen that the prepared microcapsules are dispersed and homogeneous.

[0115] Figure 2 This is the release diagram of microcapsule essential oil in the mosquito repellent fabric obtained in Example 4 during the heating process. Figure 2 It can be seen that the release activity of the microcapsules increases with increasing temperature, and the release is most active at temperatures above 30°C; at the same time, the release tends to be stable over time.

[0116] Test Example 2

[0117] The mosquito repellent performance of the mosquito repellent fabric obtained in Example 5 was tested, the test standard was GB / T30126-201310.1 approach and avoidance method, the test mosquito was Ibex albopictus; sample specifications: 4cm*4cm;

[0118] Testing process:

[0119] Attack power test: put 300 Aedes albopictus mosquitoes in a mosquito cage, expose 4cm×4cm skin on the back of the volunteer's hand, and cover the rest tightly; put the hand into the mosquito cage. If more than 30 mosquitoes land on the hand within 2 minutes, the attack power is qualified. This person and the mosquitoes in this cage can be used for repellent test.

[0120] Repellent test: Select 4 volunteers (2 males and 2 females) who have passed the attack test, install a repellent tester on the inner side of the volunteers' forearms, and then put 30 Aedes albopictus mosquitoes with qualified attack power into the tester, and count the number of mosquitoes landing on the surface of the test sample and the control sample within 2 minutes. Each volunteer is tested once, and the repellent rate is calculated.

[0121] Repellency calculation formula: R = (BT) / B × 100%

[0122] Where: R——repellency, %

[0123] B——The average number of mosquitoes staying in the control sample

[0124] T——The average number of mosquitoes landing on the test sample.

[0125] The test results are shown in Table 1:

[0126] Table 1 Mosquito repellent performance of mosquito repellent fabric obtained in Example

[0127]

[0128] For the remaining embodiments, the mosquito repellent effect of the obtained mosquito repellent fabric was tested according to the above test method, and the obtained test results are shown in Table 2;

[0129] Table 2 Mosquito repellent effect of mosquito repellent fabric obtained in the embodiment

[0130] Example 4 Example 6 Example 7 Example 8 Example 9 Avoidance rate / % 70 61.5 62.3 63.2 62

[0131] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the protection scope of the present invention.

Claims

1. The application of essential oil microcapsules in mosquito repellent fabrics is characterized by: The essential oil microcapsule comprises essential oil and a shell material wrapped on the surface of the essential oil; The essential oils include mugwort oil, lavender oil or peppermint oil.

2. The use according to claim 1, characterized in that: The shell material includes chitosan, sodium alginate / chitosan quaternary ammonium salt or beta-cyclodextrin.

3. The use according to claim 2, characterized in that: The essential oil microcapsules include chitosan encapsulating mugwort oil, beta-cyclodextrin encapsulating lavender oil or sodium alginate / chitosan quaternary ammonium salt encapsulating peppermint oil.

4. A method for preparing a mosquito repellent fabric, characterized in that: When the substrate of the mosquito repellent fabric is a natural fiber fabric, the preparation method comprises the following steps: mixing the essential oil microcapsules, the cross-linking agent, the catalyst, the penetrant and water to obtain a finishing solution; After the natural fiber fabric is immersed in the finishing liquid, heat treatment is performed to obtain the mosquito repellent fabric; When the substrate of the mosquito repellent fabric is a chemical fiber material, the preparation method comprises the following steps: The chemical fiber material and the essential oil microcapsules are mixed and granulated by melt extrusion to obtain a masterbatch; The masterbatch and chemical fiber material are mixed and melt-blended and spun to obtain mosquito repellent fiber; The mosquito repellent fiber is woven to obtain the mosquito repellent fabric.

5. The preparation method according to claim 4, characterized in that: The natural fiber fabric includes cotton or linen; the cross-linking agent includes 2D resin, the catalyst includes magnesium chloride, and the penetrant includes JFC penetrant.

6. The preparation method according to claim 4 or 5, characterized in that: The finishing liquid comprises the following components: 5-60 g / L of essential oil microcapsules, 40-210 g / L of a cross-linking agent, 8-30 g / L of a catalyst and 2-20 g / L of a penetrant.

7. The preparation method according to claim 4, characterized in that: The bath ratio of the immersion is 1:30, the immersion temperature is 40-45° C., and the immersion time is 0.5-1 h.

8. The preparation method according to claim 4, characterized in that: The heat treatment temperature is 80° C. and the time is 3 minutes.

9. The preparation method according to claim 4, characterized in that: The chemical fiber material includes polypropylene or polyester.

10. The preparation method according to claim 4, characterized in that: The mass percentage of the essential oil microcapsules in the masterbatch is 18-25%; the mass percentage of the essential oil microcapsules in the mosquito repellent fiber is 2-5%.

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