Skin biomimetic composite microporous membrane and process for its manufacture

Abstract

The application discloses a skin-biomimetic composite microporous membrane and a manufacturing process thereof. The skin-biomimetic composite microporous membrane comprises, from top to bottom, a woven mesh layer, a cracked PU film layer and an adsorption layer. The woven mesh layer is provided with mesh holes through which mouth parts of mosquitoes can pass. The cracked PU film layer has cracks and can be pierced by the mouth parts of mosquitoes. The adsorption layer is used for adsorbing mosquito feeding liquid. The woven mesh layer is used for supporting the cracked PU film layer, improving the structural strength of the microporous membrane, and reducing the occurrence of wrinkling, deformation and the like. The cracks of the cracked PU film layer can allow a small amount of mosquito feeding liquid to pass through, so as to emit an odor to attract mosquitoes. After the mosquitoes approach, the cracked PU film layer is pierced by the mouth parts, so that the mosquito feeding liquid adsorbed by the adsorption layer is sucked, so that the purposes of attracting mosquitoes and feeding mosquitoes are achieved. The application facilitates the cultivation of mosquitoes containing Wolbachia, reduces human work, reduces labor cost, and has a better feeding effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mosquito breeding technology containing Wolbachia, in particular to a skin bionic composite microporous membrane and a manufacturing process thereof. BACKGROUND

[0002] Releasing mosquitoes containing Wolbachia can effectively control the number of mosquitoes, and is an effective way to prevent and control mosquitoes and related diseases. At present, large-scale production of mosquitoes containing Wolbachia requires a large amount of manual feeding, resulting in high breeding cost and poor feeding effect. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a skin bionic composite microporous membrane, which can facilitate the breeding of mosquitoes containing Wolbachia and has good feeding effect.

[0004] The present application also provides a manufacturing process of a skin bionic composite microporous membrane.

[0005] The skin bionic composite microporous membrane according to the first aspect of the present application comprises a woven mesh layer, a cracked PU film layer and an adsorption layer distributed from top to bottom, the woven mesh layer is provided with mesh holes through which the mouthparts of mosquitoes can pass, the cracked PU film layer has cracks and can be pierced by the mouthparts of mosquitoes, and the adsorption layer is used for adsorbing mosquito feeding liquid, wherein the woven mesh layer is used for supporting the cracked PU film layer, improving the structural strength of the microporous membrane, and reducing the occurrence of wrinkling, deformation and the like, and the cracks of the cracked PU film layer can allow a small amount of mosquito feeding liquid to pass through to emit an odor to attract mosquitoes to approach and eat.

[0006] The skin bionic composite microporous membrane according to the present application has at least the following beneficial effects: the adsorption layer adsorbs mosquito feeding liquid such as sugar water and blood, the cracked PU film layer generates an odor to attract mosquitoes, and after the mosquitoes approach, the cracked PU film layer is pierced by the mouthparts of the mosquitoes to suck the mosquito feeding liquid adsorbed by the adsorption layer, thereby achieving the purpose of attracting mosquitoes and feeding mosquitoes, facilitating the breeding of mosquitoes containing Wolbachia, reducing manual work, reducing labor cost, and having better feeding effect.

[0007] According to some embodiments of the present application, the adsorption layer is a PP non-woven fabric layer.

[0008] According to some embodiments of the present application, the thickness of the adsorption layer is 50-80 microns.

[0009] According to some embodiments of the present application, the equivalent pore size of the PP non-woven fabric layer is 100±20 microns.

[0010] According to some embodiments of the present application, the woven mesh layer is a PE woven mesh layer.

[0011] According to some embodiments of the present application, the mesh size of the mesh layer is 200±20 microns.

[0012] According to some embodiments of the present application, the thickness of the mesh layer is 100-150 microns.

[0013] According to some embodiments of the present application, the crack width of the crack PU film layer is 1-2 microns.

[0014] According to some embodiments of the present application, the thickness of the crack PU film layer is 20-40 microns.

[0015] The skin-bionic composite microporous membrane manufacturing process according to the second aspect of the embodiments of the present application comprises the following steps:

[0016] Step 1, dissolving PU resin with a solvent to prepare a mixed solution with a solid content of 35%-45%;

[0017] Step 2, coating the mixed solution under the mesh layer, and placing it in an oven for baking, with a baking temperature of 120±10℃;

[0018] Step 3, taking out the composite film in the oven and placing it in a cavity at -30±5℃ for cooling, so that the PU film on the mesh layer produces cracks to form a crack PU film layer;

[0019] Step 4, compositing the adsorption layer under the crack PU film layer.

[0020] The skin-bionic composite microporous membrane manufacturing process according to the embodiments of the present application has at least the following beneficial effects: a skin-bionic composite microporous membrane can be prepared to meet the feeding requirements of mosquitoes containing Wolbachia.

[0021] According to some embodiments of the present application, in Step 1, the solvent is butanone, acetone or DMF.

[0022] According to some embodiments of the present application, in Step 2, the baking time is 15±5 min.

[0023] According to some embodiments of the present application, in Step 3, after taking out the composite film in the oven, it is placed in a refrigerator at -30±5℃ for cooling.

[0024] According to some embodiments of the present application, in Step 4, the adsorption layer is compositely attached to the bottom of the crack PU film layer by hot pressing, with a hot pressing temperature of 110-120℃ and a hot pressing time of 3-5 seconds. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of which:

[0026] Figure 1 A cross-sectional structure diagram of a skin-bionic composite microporous membrane of an embodiment of the present application;

[0027] Figure 2 A microstructure diagram of a skin-bionic composite microporous membrane of an embodiment of the present application.

[0028] Reference Signs:

[0029] The woven mesh layer 100, the cracked PU film layer 200, and the adsorption layer 300. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to examples thereof illustrated in the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that, in relation to orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In the description of the present application, if there is a description of first, second, etc. for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] In the related art, the cultivation of mosquitoes containing Wolbachia generally needs to manually pour mosquito feeding liquid such as blood and sugar water into the cultivation cavity for feeding, which needs to consume a large amount of manpower in the feeding link, has a high cultivation cost, and has a poor feeding effect.

[0035] The following will be described with reference to Figure 1 , Figure 2 The skin-bionic composite microporous membrane according to the embodiments of the present application is described below.

[0036] AsFigure 1 As shown, the skin-bionic composite microporous membrane according to the embodiment of the present application comprises a woven mesh layer 100, a cracked PU film layer 200 and an adsorption layer 300 from top to bottom, the woven mesh layer 100 is provided with mesh holes through which the mouthparts of mosquitoes can pass, the cracked PU film layer 200 has cracks and can be pierced by the mouthparts of mosquitoes, and the adsorption layer 300 is used for adsorbing mosquito feeding liquid.

[0037] The woven mesh layer 100 is used for supporting the cracked PU film layer 200, improving the structural strength of the microporous membrane and reducing the occurrence of wrinkling, deformation and the like, and the cracks of the cracked PU film layer 200 can allow a small amount of mosquito feeding liquid to pass through to emit an odor to attract mosquitoes to approach and eat.

[0038] In application, the adsorption layer 300 adsorbs mosquito feeding liquid such as sugar water, blood and the like, the cracked PU film layer 200 generates mosquito-attracting odor, and after the mosquitoes approach, the cracked PU film layer 200 is pierced by the mouthparts to thereby suck the mosquito feeding liquid adsorbed by the adsorption layer 300, so as to achieve the purpose of attracting and feeding mosquitoes, facilitate the cultivation of mosquitoes containing Wolbachia, reduce manual work and labor cost, and adopt the skin-bionic design to be more suitable for the actual eating environment of mosquitoes and have better feeding effect.

[0039] It is conceivable that in some embodiments of the present application, the skin-bionic composite microporous membrane can be arranged on the outer wall of a pipeline or container for conveying mosquito feeding liquid, and the pipeline or container for conveying mosquito feeding liquid is arranged in a mosquito cultivation chamber, so as to realize automatic and continuous feeding and cultivation of mosquitoes and reduce a large amount of manual work.

[0040] In some embodiments of the present application, the crack width of the cracked PU film layer 200 is 1-2 microns to allow a small amount of mosquito feeding liquid to pass through to generate mosquito-attracting odor.

[0041] Specifically, when the crack width of the cracked PU film layer 200 is 1 micron, 1.5 microns or 2 microns, a small amount of mosquito feeding liquid can pass through to generate mosquito-attracting odor.

[0042] In some embodiments of the present application, the thickness of the cracked PU film layer 200 is 20-40 microns to facilitate the piercing of the mouthparts of mosquitoes.

[0043] Specifically, if the thickness of the cracked PU film layer 200 is too large, the mouthparts of mosquitoes cannot pierce it, and if the thickness is too small, it is prone to breakage, which can cause a large amount of mosquito feeding liquid to leak. In some embodiments of the present application, when the thickness of the cracked PU film layer 200 is 20 microns, 25 microns, 30 microns, 35 microns or 40 microns, the cracked PU film layer 200 can be easily pierced by mosquitoes and is not prone to breakage.

[0044] It is conceivable that in some embodiments of the present application, the woven mesh layer 100 is combined and fixed with the cracked PU film layer 200.

[0045] Specifically, the crack PU film layer 200 can be arranged on the woven mesh layer 100 by means of bonding or coating.

[0046] It is conceivable that in some embodiments of the present application, the woven mesh layer 100 is a PE woven mesh layer, which forms support for the crack PU film layer 200 and reduces the occurrence of wrinkles and damage of the crack PU film layer 200.

[0047] Specifically, the crack PU film layer 200 is set to be relatively thin in thickness in order to be pierced by the mouthparts of mosquitoes, and is more prone to wrinkles or damage. By configuring the PE woven mesh layer, the crack PU film layer 200 can be supported like a skeleton.

[0048] It can be understood that in some embodiments of the present application, the woven mesh layer 100 can also be a woven mesh of other materials, such as a PP woven mesh.

[0049] In some embodiments of the present application, the thickness of the woven mesh layer 100 is 100-150 microns, so as to form a better supporting effect on the crack PU film layer 200.

[0050] Specifically, the thickness of the woven mesh layer 100 can be set to 100 microns, 125 microns, 150 microns, etc., all of which can achieve a better supporting effect.

[0051] In some embodiments of the present application, the pore size of the mesh of the woven mesh layer 100 is 200±20 microns, so as to avoid affecting the normal sucking of mosquito feeding liquid by mosquitoes and achieving a better supporting effect on the crack PU film layer 200.

[0052] Specifically, if the equivalent pore size of the woven mesh layer 100 is too large, the supporting effect will be reduced, and if it is too small, it will affect the normal sucking of mosquito feeding liquid by mosquitoes. In the present application, when the equivalent pore size of the woven mesh layer 100 is 180 microns, 200 microns or 220 microns, an ideal balanced state can be achieved, that is, the sucking requirement of mosquitoes can be met and a better supporting effect can be achieved.

[0053] In some embodiments of the present application, the adsorption layer 300 is located below the crack PU film layer 200 and is combined and fixed with the crack PU film layer 200 by means of bonding, hot pressing or the like.

[0054] In some embodiments of the present application, the adsorption layer 300 is a PP non-woven fabric layer, which utilizes the adsorption performance of the PP non-woven fabric to adsorb mosquito feeding liquid.

[0055] It is conceivable that in some embodiments of the present application, the adsorption layer 300 can also be a porous flexible material such as cotton or water-absorbing foam layer, which can also achieve a good effect of adsorbing mosquito feeding liquid.

[0056] In some embodiments of the present application, the equivalent pore size of the PP non-woven fabric layer is 100±20 microns, so as to facilitate the mouthparts of mosquitoes to suck the mosquito feeding liquid adsorbed in the PP non-woven fabric layer.

[0057] Specifically, when the equivalent pore size of the PP non-woven fabric layer is 80 microns, 100 microns or 120 microns, a better adsorption effect can be achieved, and the influence on the mosquito feeding liquid sucked by the mosquitoes is small.

[0058] In some embodiments of the present application, the thickness of the adsorption layer 300 is 50-80 microns, so as to adsorb a sufficient amount of mosquito feeding liquid for the mosquitoes to suck, and ensure a better adsorption effect of the adsorption layer 300.

[0059] Specifically, if the adsorption layer 300 is too thin, it is easy to cause insufficient adsorption of the mosquito feeding liquid, and if it is too thick, it is easy to cause unstable supply. In the present embodiment, the thickness of the adsorption layer 300 is 50 microns, 60 microns, 70 microns or 80 microns, all of which can achieve a better adsorption effect and normal supply.

[0060] The manufacturing process of the skin-bionic composite microporous membrane according to the present application comprises the following steps:

[0061] Step 1, dissolving PU resin with a solvent to prepare a mixed solution with a solid content of 35%-45%;

[0062] Step 2, coating the mixed solution under the woven mesh layer 100, and placing it in an oven for baking, with a baking temperature of 120±10℃;

[0063] Step 3, taking out the composite membrane from the oven and placing it in a cavity at-30±5℃ for cooling, so as to make the PU film on the woven mesh layer 100 crack and form a cracked PU film layer 200;

[0064] Step 4, compounding the adsorption layer 300 to the lower side of the cracked PU film layer 200.

[0065] Finally, the skin-bionic composite microporous membrane is prepared, which can meet the feeding requirements of mosquitoes.

[0066] Specifically, as shown in Figure 2 The prepared skin-bionic composite microporous membrane has a grid-shaped woven mesh layer 100, which forms the main skeleton of the microporous membrane, and the cracked PU film layer 200 is densely covered with cracks, which can be in the form of crack or irregular random distribution.

[0067] It should be noted that, in the specific implementation process, the cracks of the cracked PU film layer 200 have a certain randomness, and the specific shape or pattern thereof can be different from Figure 2 shown.

[0068] In some embodiments of the present application, in step 1, the solvent is butanone, which has good dissolving effect on PU resin.

[0069] It can be conceived that, in some embodiments of the present application, the solvent can also be acetone or DMF (N,N-dimethylformamide), which can also have good dissolving effect on PU resin.

[0070] In some embodiments of the present application, in step 2, the baking time is 15±5 min, so that the PU resin mixed solution coated on the woven mesh layer 100 is cured and reaches 120±10℃.

[0071] In the specific implementation process, the baking time will be adjusted according to the solid content and coating amount of the mixed solution.

[0072] In some embodiments of the present application, in step 3, after the composite film in the oven is taken out, it is placed in a refrigerator at-30±5℃ for cooling, so as to produce a high-low temperature difference, which causes the PU film to produce cracks.

[0073] Specifically, the refrigerator is a conventional refrigerator, and the inside is air or protective gas. Of course, in the specific implementation process, the composite film taken out from the oven can also be placed in other cooling cavities, such as a low-temperature cavity arranged on the production line.

[0074] In some embodiments of the present application, in step 4, the adsorption layer 300 is compounded below the cracked PU film layer 200 by hot pressing, and the hot pressing temperature is 110-120℃, and the hot pressing time is 3-5 seconds.

[0075] It can be conceived that, in some embodiments of the present application, the adsorption layer 300 is compounded below the cracked PU film layer 200 by adhesion, such as polyurethane adhesive adhesion.

[0076] It can be understood that, in some embodiments of the present application, the adsorption layer 300 is compounded below the cracked PU film layer 200 by adhesion after adhesion by an adhesive, which can achieve better compounding effect.

[0077] Example 1

[0078] The skin bionic composite microporous membrane manufacturing process comprises the following steps:

[0079] Step 1, PU resin is dissolved by using butanone solvent to prepare a mixed solution with a solid content of 38%;

[0080] Step 2, the mixed solution is coated below the woven mesh layer 100 and placed in an oven for baking, the baking temperature is 120℃, and the baking time is 15 min;

[0081] Step 3, the composite film in the oven is taken out and cooled in a refrigerator at -30°C, and the PU film on the woven mesh layer 100 is cracked to form a cracked PU film layer 200 by using the high and low temperature difference;

[0082] Step 4, the adsorption layer 300 is hot-pressed and combined below the cracked PU film layer 200, the hot-pressing temperature is 115°C, and the hot-pressing time is 4 seconds.

[0083] Thus, the skin bionic composite microporous membrane is prepared, which can meet the feeding requirements of mosquitoes. The adsorption layer 300 adsorbs mosquito feeding liquid such as sugar water and blood, the cracked PU film layer 200 generates mosquito attracting odor, and the mosquito approaches and pierces the cracked PU film layer 200 through the mouth part, thereby sucking the mosquito feeding liquid adsorbed by the adsorption layer 300, so as to achieve the purpose of attracting and feeding mosquitoes, facilitate the cultivation of mosquitoes containing Wolbachia, reduce human work, reduce labor cost, and adopt the skin bionic design, which is more suitable for the actual feeding environment of mosquitoes and has better feeding effect.

[0084] Example Two

[0085] The skin bionic composite microporous membrane manufacturing process comprises the following steps:

[0086] Step 1, PU resin is dissolved in butanone solvent to prepare a mixed solution with a solid content of 35%;

[0087] Step 2, the mixed solution is coated below the woven mesh layer 100, and is baked in an oven, the baking temperature is 115°C, and the baking time is 12 min;

[0088] Step 3, the composite film in the oven is taken out and cooled in a refrigerator at -31°C, and the PU film on the woven mesh layer 100 is cracked to form a cracked PU film layer 200 by using the high and low temperature difference;

[0089] Step 4, the adsorption layer 300 is hot-pressed and combined below the cracked PU film layer 200, the hot-pressing temperature is 120°C, and the hot-pressing time is 3 seconds.

[0090] Thus, the skin bionic composite microporous membrane is prepared, which can meet the feeding requirements of mosquitoes.

[0091] Example Three

[0092] The skin bionic composite microporous membrane manufacturing process comprises the following steps:

[0093] Step 1, PU resin is dissolved in acetone solvent to prepare a mixed solution with a solid content of 42%;

[0094] Step 2, the mixed solution is coated below the woven mesh layer 100, and is baked in an oven, the baking temperature is 125°C, and the baking time is 18 min;

[0095] Step 3, the composite film in the oven is taken out and cooled in a refrigerator at-28℃, cracks are generated on the PU film on the woven mesh layer 100 by using the high and low temperature difference, and a cracked PU film layer 200 is formed;

[0096] Step 4, the adsorption layer 300 is hot-pressed and combined to the lower side of the cracked PU film layer 200, the temperature of the hot-pressing and combining is 110℃, and the hot-pressing and combining time is 5 seconds.

[0097] Thus, the skin bionic composite microporous film is prepared, and the feeding requirement of mosquitoes can be met.

[0098] Of course, the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A skin biomimetic composite microporous membrane, characterized in that, The skin bionic composite microporous membrane comprises a woven mesh layer (100) provided with mesh holes capable of being penetrated by the mouthparts of mosquitoes; a cracked PU film layer (200) disposed below the woven mesh layer (100) and provided with cracks, the cracked PU film layer (200) being capable of being penetrated by the mouthparts of mosquitoes; and an adsorption layer (300) disposed below the cracked PU film layer (200) and used for adsorbing mosquito feeding liquid. The skin bionic composite microporous membrane manufacturing process comprises the following steps: Step 1: dissolving PU resin by using a solvent to prepare a mixed solution with a solid content of 35%-45%; Step 2: coating the mixed solution below the woven mesh layer (100) and placing the same in an oven for baking, the baking temperature being 120±10℃; 2. A skin biomimetic composite microporous membrane manufacturing process characterized by, Step 3: taking the composite film out of the oven and placing the same in a cavity with a temperature of -30±5℃ for cooling, so that the PU film on the woven mesh layer (100) is cracked to form the cracked PU film layer (200); Step 4: compounding the adsorption layer (300) below the cracked PU film layer (200).

3. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein in step 1, the solvent is butanone, acetone or DMF.

4. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein in step 2, the baking time is 15±5 min.

5. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein the adsorption layer (300) is a PP non-woven fabric layer.

6. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein the woven mesh layer (100) is a PE woven mesh layer.

7. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein the mesh hole of the woven mesh layer (100) has a pore size of 200±20 microns.

8. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein the crack width of the cracked PU film layer (200) is 1-2 microns.

9. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein the thickness of the cracked PU film layer (200) is 20-40 microns.

10. The skin bionic composite microporous membrane manufacturing process according to claim 2, wherein in step 4, the adsorption layer (300) is compounded below the cracked PU film layer (200) by hot pressing, the hot pressing temperature being 110-120℃ and the hot pressing time being 3-5 seconds. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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