Anti-infiltration structure and containing device with anti-infiltration function

Abstract

The utility model belongs to the technical field of liquid containing, and relates to an anti-infiltration structure and a containing device with an anti-infiltration function. The anti-infiltration structure is used for preventing liquid from infiltrating a liquid container and comprises an inner covering film and an anti-infiltration layer, the inner covering film is arranged on the inner wall of the liquid container; the anti-infiltration layer is arranged on the surface of the inner covering film and comprises a plurality of first protruding structures and a plurality of second protruding structures, the first protruding structures are distributed on the surface of the inner covering film at intervals, and the second protruding structures are distributed between every two adjacent first protruding structures at intervals; the height of the first protruding structures is larger than that of the second protruding structures, and the distance between every two adjacent second protruding structures is smaller than the diameter of liquid. According to the anti-infiltration structure provided by the scheme, the problem that the liquid metal gallium is hung on the wall of the container during storage and containing is effectively solved, the utilization rate of the liquid metal gallium is increased, waste is reduced, the inner wall of the container does not need to be cleaned with an acid-base solution, and the liquid metal gallium is prevented from being polluted.

Description

Technical Field

[0001] The present application relates to the technical field of liquid holding technology, and in particular to an anti-infiltration structure and a holding device with an anti-infiltration function. Background Art

[0002] Liquid gallium metal wets all metal surfaces, so metal containers cannot be used to store it to prevent contamination and wetting. Liquid gallium containers are typically made of glass, ceramic, or plastic, but liquid gallium also wets glass, ceramic, or plastic to some extent, easily forming a liquid film on them. For the most common plastic materials—polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), acrylonitrile butadiene styrene (ABS), or nylon—after containing liquid gallium, a layer of gallium film typically forms on the inner walls of the container, which is difficult to remove. A 1000ml PE beaker can hold 6g of liquid gallium, a 3L PP bucket can hold 20g, and a 5L PP bucket can hold 30g. The larger the container, the greater its internal surface area, and the more liquid gallium it can hold.

[0003] In order to reduce the amount of liquid metal gallium hanging on the inner wall of the container, the existing technology uses hydrochloric acid solution or sodium hydroxide solution to clean the inner wall of the container, thereby increasing the contact angle between the liquid metal gallium and the plastic surface, causing the gallium film attached to the inner wall to shrink into small balls and fall off; however, the liquid metal gallium will be dissolved by hydrochloric acid or sodium hydroxide, resulting in loss. At the same time, hydrochloric acid or sodium hydroxide will also cause contamination to the liquid metal gallium, resulting in a decrease in the purity of the liquid metal gallium. In addition, the existing technology also uses passivation to form a rough surface on the inner wall of the container, so that the contact area between the liquid metal gallium and the inner wall of the container is reduced, reducing the adhesion force, thereby reducing the amount of liquid metal gallium hanging on the inner wall to a certain extent. However, the uniformity of the rough surface is difficult to control. The non-uniform surface tends to have better gallium-repellent properties in the rough area, avoiding the hanging of liquid metal gallium, while some areas with lower roughness still have hanging liquid metal gallium, such as Figure 2 shown.

[0004] In summary, the methods of preventing liquid metal gallium from infiltrating containers in the prior art have some disadvantages. The method of using acid and alkali solutions to clean the inner wall of the device to prevent liquid metal gallium from infiltrating will dissolve and contaminate the liquid metal gallium, resulting in loss of liquid metal gallium or reduced purity; and roughening the inner wall of the container cannot effectively avoid the problem of liquid metal gallium adhering to the wall. Summary of the Invention

[0005] To this end, the technical problem to be solved by this application is to overcome the problem in the prior art of using acid-base solution to clean the inner wall of the device to prevent liquid metal gallium from infiltrating, which will dissolve and contaminate the liquid metal gallium, resulting in loss of liquid metal gallium or reduced purity; and roughening the inner wall of the container cannot effectively avoid the problem of liquid metal gallium sticking to the wall.

[0006] To solve the above technical problems, the present application provides an anti-infiltration structure for preventing liquid from infiltrating a liquid container. The anti-infiltration structure includes:

[0007] An inner coating, provided on the inner wall of the liquid holding container;

[0008] an anti-wetting layer, disposed on the surface of the inner coating, comprising a plurality of first protrusion structures and a plurality of second protrusion structures;

[0009] Among them, the multiple first protrusion structures are distributed at intervals on the surface of the inner membrane, and multiple second protrusion structures are distributed at intervals between two adjacent first protrusion structures; the height of the first protrusion structure is greater than the height of the second protrusion structure, and the distance between two adjacent second protrusion structures is less than the diameter of the liquid.

[0010] In the present application, a plurality of first protrusion structures are distributed at intervals on the surface of the inner film, and a plurality of second protrusion structures are distributed at intervals between two adjacent first protrusion structures, wherein the height of the second protrusion structure is smaller than that of the first protrusion structure; the present application utilizes the first protrusion structure to reduce the contact area between the liquid metal gallium and the inner film, and at the same time, the spacing between adjacent second protrusion structures is smaller than the diameter of the liquid gallium nitride droplets. For liquid metal gallium droplets with smaller diameters on the surface of the inner film, the smaller second protrusion structure can be used to reduce the contact area between the droplets and the inner film, thereby reducing the contact between the liquid metal gallium and the inner film. The adhesion between the films is reduced, thereby reducing the adhesion of liquid metal gallium to the surface of the liquid holding container and preventing the liquid metal gallium from infiltrating the liquid holding container; and, due to the presence of air between adjacent protrusion structures, the liquid metal gallium cannot penetrate into the interior of the protrusion structure, but flows on the surface of the protrusion structure, presenting a phenomenon similar to super-hydrophobicity; the use of this anti-infiltration structure effectively solves the problem of liquid metal gallium hanging on the container wall during storage and holding, improves the utilization rate of liquid metal gallium, reduces waste, and eliminates the need to use acid or alkali solutions to clean the inner wall of the container, thereby avoiding contamination of the liquid metal gallium.

[0011] Preferably, the distance between two adjacent first protrusion structures is smaller than the diameter of the liquid.

[0012] Preferably, the size of the first protruding structure is larger than the size of the second protruding structure.

[0013] In the present application, the distance between adjacent first protrusion structures is smaller than the diameter of the liquid metal gallium droplets, so that the liquid metal gallium droplets can be located on the surface of the inner film with the support of the first protrusion structures. For liquid metal gallium droplets with a diameter smaller than the spacing between the first protrusion structures, they can also be located on the surface of the inner film with the support of the second protrusion structures of smaller size, so that the liquid metal gallium droplets will not completely contact the surface of the inner film.

[0014] Preferably, a plurality of nano-protrusion structures are provided on the surface of each of the first protrusion structure and the second protrusion structure on the side away from the inner coating.

[0015] In the present application, since the surface tension of liquid metal gallium is large and its surface excess free energy is large, the small droplets formed by liquid metal gallium will not decompose into more and smaller droplets when contacted with a smaller support contact surface. Therefore, by providing a nano-protrusion structure on the top of the first protrusion structure and the second protrusion structure, the contact area between the liquid metal gallium and the inner coating can be further reduced, the contact angle can be increased, and the amount of liquid metal gallium attached can be reduced.

[0016] Preferably, the shape of the nano-protrusion structure can be a regular pattern or an irregular pattern, for example, the shape of the nano-protrusion structure includes a triangular pyramid, a pentagon, a hexagon, and a claw shape; and / or

[0017] The size of the nano-protrusion structure is 1 nm to 100 nm; the height of the nano-protrusion structure is 1 nm to 100 nm.

[0018] In the present application, the shape of the nano-protrusion structure can be regular or irregular, and the size of the nano-protrusion structure is nanoscale, similar to the regularly arranged hills (i.e., the first protrusion structure and the second protrusion structure) formed on the surface of the inner film. The nano-protrusion structure on the top of the hill is similar to a raised bunker top growing on the hill. The gaps in the hill are filled with air, thus forming an extremely thin air layer of only nanoscale. Since the liquid metal gallium droplets are larger than these microstructures, the nano-protrusion structure can support the metal gallium droplets. When the liquid metal gallium droplets are on the surface of the inner film, they can only form a few points of contact with the protrusion structure and the bunker top through a layer of nano-air, and cannot further infiltrate, thereby increasing the contact angle and reducing the amount of liquid metal gallium adhered.

[0019] Preferably, the plurality of first protrusion structures are arranged in an equilateral triangle array on the surface of the inner coating; and / or

[0020] Each of the first protruding structures is in the shape of a cylinder or a cuboid; and / or

[0021] There are 3 to 5 second protrusion structures spaced apart between two adjacent first protrusion structures; and / or

[0022] Each of the second protruding structures is in the shape of a cylinder or a cuboid.

[0023] In the present application, multiple first protrusion structures are arranged in an equilateral triangle array, thereby ensuring that the distance between any two adjacent first protrusion structures is the same, ensuring the uniformity of the first protrusion structures, avoiding the problem of being unable to support liquid metal gallium droplets due to excessive spacing between the first protrusion structures, further improving the superhydrophobicity of the anti-wetting layer, and reducing the adhesion performance of liquid metal gallium; in addition, 3 to 5 second protrusion structures are set between two adjacent first protrusion structures, which can not only utilize the second protrusion structures to provide good support for liquid metal gallium droplets with smaller diameters, but also ensure the uniformity of the second protrusion structures.

[0024] Preferably, the thickness of the anti-infiltration structure is 0.3 mm to 0.5 mm; and / or

[0025] The height of the first protruding structure is 1 / 4 to 1 / 2 of the thickness of the anti-wetting structure.

[0026] In the present application, by the above arrangement, the protruding structure (including the first protruding structure and the second protruding structure) can be firmly fixed on the inner covering film, thereby improving the stability of the first protruding structure and the second protruding structure.

[0027] It is worth noting that the thickness of the inner coating will not affect the storage of liquid metal gallium, and the inner coating is thin and has little gravity, making it easier to adhere to the inner wall of the liquid storage container.

[0028] Preferably, the size of the first protruding structure is 80 μm to 100 μm; the height of the first protruding structure is 150 μm to 200 μm; the distance between two adjacent first protruding structures is 100 μm to 180 μm; and / or

[0029] The size of the second protruding structure is 10 μm to 50 μm; the height of the second protruding structure is 20 μm to 60 μm; and the distance between two adjacent second protruding structures is 10 μm to 20 μm.

[0030] In the present application, since the diameter of the liquid metal gallium droplets is approximately 200μm~500μm, by limiting the size of the first protrusion structure and controlling the distance between adjacent first protrusion structures to be smaller than the diameter of the liquid metal gallium droplets, the liquid metal gallium droplets can be located on the surface of the inner coating with the support of the first protrusion structure. At the same time, by limiting the size of the second protrusion structure and the distance between adjacent second protrusion structures, even if there are liquid metal gallium droplets with a diameter smaller than the distance between adjacent first protrusion structures, the second protrusion structures arranged between the first protrusion structures can also provide good support for them, thereby preventing liquid metal gallium droplets with smaller diameters from adhering to the surface of the inner coating.

[0031] Preferably, the material of the anti-wetting layer is the same as that of the inner coating.

[0032] In this application, the anti-infiltration layer and the inner coating are made of the same material, so that the anti-infiltration layer and the inner coating have similar physical and chemical properties, thereby more firmly setting the anti-infiltration layer on the surface of the inner coating, improving the stability and durability of the entire anti-infiltration structure.

[0033] The present application also provides a holding device with an anti-infiltration function, comprising:

[0034] Liquid containers;

[0035] The above-mentioned anti-infiltration structure is arranged on the inner wall of the liquid holding container.

[0036] In the present application, by attaching the inner film to the inner wall of the liquid holding container and utilizing the raised structure on the anti-wetting layer to reduce the adhesion between the liquid metal gallium and the inner film, the problem of liquid metal gallium hanging on the container wall during storage and holding is effectively solved, thereby improving the utilization rate of liquid metal gallium, reducing waste, and eliminating the need to use acid or alkali solutions to clean the inner wall of the container, thereby avoiding the risk of contamination of the liquid metal gallium.

[0037] Preferably, the inner coating in the anti-wetting structure is adsorbed on the inner wall of the liquid container by electrostatic adsorption; and / or the material of the inner coating is the same as that of the liquid container.

[0038] In the present application, the inner film is electrostatically treated and attached to the surface of the inner wall of the liquid holding container under a vacuum environment. There is no need to use cross-linking agents or adhesives containing volatile organic substances to attach the inner film to the inner wall of the liquid holding container. This prevents the influence of bubbles or impurities between the inner film and the inner wall of the liquid holding container, and avoids the falling off of the inner film due to the failure of the cross-linking agent or adhesive due to long-term use. In addition, the inner film is made of the same material as the liquid holding container, so that its electrical properties are consistent with the surface of the liquid holding container, thereby ensuring that the electrostatic adsorption process is more stable and effective.

[0039] The anti-infiltration structure provided by this application has the following beneficial effects:

[0040] The anti-infiltration structure provided in the present application includes an inner covering film and an anti-infiltration layer arranged on the surface of the inner covering film; the anti-infiltration layer includes a plurality of first protrusion structures spaced apart on the surface of the inner covering film, and a plurality of second protrusion structures spaced apart between two adjacent first protrusion structures; the height of the first protrusion structure is greater than the height of the second protrusion structure, and the distance between two adjacent second protrusion structures is less than the diameter of the liquid. The present application utilizes the first protruding structure to reduce the contact area between the liquid metal gallium and the inner film. At the same time, the spacing between adjacent second protruding structures is smaller than the diameter of the liquid gallium nitride droplets. For liquid metal gallium droplets with a smaller diameter on the surface of the inner film, the smaller second protruding structure can be used to reduce the contact area between the droplets and the inner film, reduce the adhesion between the liquid metal gallium and the inner film, thereby reducing the adhesion of the liquid metal gallium to the surface of the liquid holding container, and preventing the liquid metal gallium from infiltrating the liquid holding container; and, due to the presence of air between adjacent protruding structures, the liquid metal gallium cannot penetrate into the interior of the protruding structure, but flows on the surface of the protruding structure, presenting a phenomenon similar to super-hydrophobicity; the use of this anti-infiltration structure effectively solves the problem of liquid metal gallium hanging on the container wall during storage and holding, improves the utilization rate of liquid metal gallium, reduces waste, and does not require the use of acid or alkali solutions to clean the inner wall of the container, thereby avoiding contamination of the liquid metal gallium. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to make the content of this application easier to understand, the following is a further detailed description of this application based on specific embodiments of the application and in conjunction with the accompanying drawings, wherein:

[0042] Figure 1 A schematic diagram of an anti-infiltration structure provided in this application;

[0043] Figure 2 A top view of the anti-infiltration structure provided for this application;

[0044] Figure 3 Schematic diagram of liquid metal gallium droplets of different diameters on the surface of the anti-wetting layer provided in this application;

[0045] Figure 4 A schematic diagram of another anti-infiltration structure provided for this application;

[0046] Figure 5 This is a schematic diagram of providing a nano-protrusion structure on the surface of the first protrusion structure provided in the present application; wherein, Figure 5 (a) is a schematic diagram of a pentagonal nano-protrusion structure provided on the surface of the first protrusion structure. Figure 5 (b) is a schematic diagram of a pyramid-shaped nano-protrusion structure provided on the surface of the first protrusion structure;

[0047] Figure 6 Schematic diagram of the holding device with anti-infiltration function provided by this application;

[0048] Figure 7 The optical photographs of the anti-wetting structure surface of liquid metal gallium provided in Example 3 and Example 4 are as follows; wherein, Figure 7 (a) is an optical photograph of liquid metal gallium on the surface of the anti-wetting structure provided in Example 3. Figure 7 (b) is an optical photograph of liquid metal gallium on the surface of the anti-wetting structure provided in Example 4;

[0049] Figure 8 A schematic diagram comparing the contact angles of liquid metal gallium when it is placed in containers containing different liquids;

[0050] Explanation of the reference numerals in the accompanying drawings in the specification: 1. inner coating; 2. anti-wetting layer; 21. first protrusion structure; 22. second protrusion structure; 23. nano-protrusion structure; 3. liquid container; 4. liquid metal gallium droplet. DETAILED DESCRIPTION

[0051] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it, but the embodiments are not intended to limit the present application.

[0052] There is a wealth of literature in the prior art that studies the wetting properties of water and oil, aiming to reduce water or oil infiltration to reduce dirt adhesion. However, due to significant differences between water, oil, and liquid gallium metal, including differences in density, surface adhesion, chemical bonds between metals and inorganic or organic matter, and surface tension, liquid gallium metal is solid below approximately 29 degrees Celsius and liquid above approximately 29 degrees Celsius, with a lower solid-liquid transition temperature, which differs from the properties of water and oil. Therefore, prior art research on contact angles and surface adhesion properties of water and oil is of limited reference value. For example, the surface tension of liquid gallium metal is greater than that of water and oil. The thin layer of liquid gallium metal surface in contact with air is the surface layer, where the gallium metal atoms are more sparsely distributed than those in the interior. The interatomic distances are greater than those in the liquid interior, resulting in a greater attractive force between them. Due to the relationship between surface tension and contact angle, liquid gallium has a higher surface tension and greater excess surface free energy (the surface tensions of water and liquid gallium differ, manifested macroscopically by the concave surface of water in a small test tube, while the convex surface of liquid gallium in a small test tube). When supported by a microstructure, the resulting small droplets do not break down into more and smaller droplets due to the small support contact area. Furthermore, as a relatively niche semiconductor material that has only recently emerged, gallium's application areas are relatively limited, resulting in little industry attention to the issue of gallium adhesion inside liquid gallium containers. Therefore, the present application provides an anti-wetting structure to address the problem of gallium adhering to the inner walls of the container, thereby improving the utilization rate of liquid gallium. It is understood that in addition to preventing liquid gallium from wetting liquid containers, the present application is also applicable to other liquids, such as liquid indium and liquid tin.

[0053] See also Figure 1 , Figure 1 The figure shows a schematic diagram of the anti-infiltration structure provided by the present application. The anti-infiltration structure is used to prevent liquid from infiltrating a liquid container. The anti-infiltration structure specifically includes: an inner coating 1 and an anti-infiltration layer 2.

[0054] The inner film 1 is arranged on the inner wall of the liquid container.

[0055] The anti-infiltration layer 2 is arranged on the surface of the inner film 1, and includes multiple first protrusion structures 21 and multiple second protrusion structures 22. The multiple first protrusion structures 21 are distributed on the surface of the inner film 1 at intervals, and multiple second protrusion structures 22 are distributed between adjacent two first protrusion structures 21.

[0056] The height of the first protruding structure 21 is greater than the height of the second protruding structure 22 , and the distance between two adjacent second protruding structures 22 is less than the diameter of the liquid.

[0057] Furthermore, the material of the anti-wetting layer 2 is the same as that of the inner coating 1 .

[0058] In one embodiment, the material of the inner coating 1 includes PVC, PE, PP, and ABS; the material of the anti-wetting layer 2 includes PVC, PE, PP, and ABS.

[0059] The anti-infiltration layer 2 and the inner film 1 are made of the same material, so that the anti-infiltration layer 2 and the inner film 1 have similar physical and chemical properties, so that the anti-infiltration layer 2 can be more firmly arranged on the surface of the inner film 1, improving the stability and durability of the entire anti-infiltration structure.

[0060] Furthermore, the distance between two adjacent first protrusion structures 21 is smaller than the diameter of the liquid.

[0061] Furthermore, the size of the first protruding structure 21 is greater than that of the second protruding structure 22 ; or, the width of the first protruding structure 21 is greater than that of the second protruding structure 22 , and the length of the first protruding structure 21 is greater than that of the second protruding structure 22 .

[0062] The distance between adjacent first protrusion structures 21 is smaller than the diameter of the liquid metal gallium droplets, so that the liquid metal gallium droplets can be located on the surface of the inner film 1 with the support of the first protrusion structures 21. For liquid metal gallium droplets with a diameter smaller than the distance between the first protrusion structures 21, they can also be located on the surface of the inner film 1 with the support of the smaller second protrusion structures 22, so that the liquid metal gallium droplets will not completely contact the surface of the inner film 1.

[0063] Furthermore, the first protruding structure 21 is in the shape of a cylinder or a cuboid; and / or the second protruding structure 22 is in the shape of a cylinder or a cuboid.

[0064] This embodiment does not limit the shapes of the first and second protruding structures 21, 22. For example, the first protruding structure 21 can be in the shape of a cylinder, a cuboid, a cube, or a prism; the second protruding structure 22 can be in the shape of a cylinder, a cuboid, a cube, or a prism. When the first and second protruding structures 21, 22 are cylindrical, the dimensions of the first and second protruding structures 21, 22 are the diameters of the cylinders. When the first and second protruding structures 21, 22 are cuboids or cubes, the dimensions of the first and second protruding structures 21, 22 are the length and width of their cross-sections.

[0065] In a specific embodiment, if Figure 2 As shown, a plurality of first protruding structures 21 are arranged in an equilateral triangle array on the surface of the inner covering film 1 ; 3 to 5 second protruding structures 22 are spaced apart between two adjacent first protruding structures 21 .

[0066] The first raised structures 21 are arranged at the vertices of an equilateral triangle, ensuring a consistent distance between adjacent first raised structures 21 and ensuring uniformity of the first raised structures 21 on the surface of the inner coating 1. This avoids the problem of excessive spacing between the first raised structures 21, which could prevent them from supporting liquid gallium droplets. This further enhances the super-hydrophobicity of the anti-wetting layer 2 and reduces the adhesion of liquid gallium. Three to five second raised structures 22 are positioned between two adjacent first raised structures 21, effectively supporting smaller liquid gallium droplets while also ensuring uniformity of the second raised structures 22 on the surface of the inner coating 1.

[0067] Furthermore, the anti-infiltration structure has a thickness of 0.3 mm to 0.5 mm, for example, 0.3 mm, 0.32 mm, 0.34 mm, 0.36 mm, 0.38 mm, 0.4 mm, 0.42 mm, 0.44 mm, 0.46 mm, 0.48 mm or 0.5 mm.

[0068] Furthermore, the height of the first protruding structure 21 is 1 / 4 to 1 / 2 of the thickness of the anti-wetting structure, for example, 1 / 4, 5 / 16, 3 / 8, 7 / 16 or 1 / 2.

[0069] Specifically, when the inner film 1 is attached to a liquid container, the thickness of the inner film 1 will not affect the container's ability to hold liquid metal gallium. The thinner inner film 1 has less gravity and is easier to adhere to the inner wall of the container. When the height of the first protruding structure 21 is 1 / 4 to 1 / 2 of the thickness of the anti-infiltration structure, the protruding structure can be more firmly fixed on the inner film 1.

[0070] In a specific embodiment, the size of the first protrusion structure 21 is 80μm~100μm, for example: 80μm, 83μm, 86μm, 89μm, 92μm, 95μm, 97μm or 100μm; the height of the first protrusion structure 21 is 150μm~200μm, for example: 150μm, 160μm, 170μm, 180μm, 190μm or 200μm; the distance between two adjacent first protrusion structures 21 is 100μm~180μm, for example: 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm or 180μm. The size of the second protrusion structure 22 is 10 μm to 50 μm, for example, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm; the height of the second protrusion structure 22 is 20 μm to 60 μm, for example, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm or 60 μm; the distance between two adjacent second protrusion structures 22 is 10 μm to 20 μm, for example, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm or 20 μm.

[0071] It is understandable that the above-mentioned dimensions may be length, width, diameter or radius, etc. For example, the shape of the first protrusion structure 21 is rectangular, and the length and width of the first protrusion structure 21 are both 80 μm to 100 μm.

[0072] Specifically, taking liquid gallium as an example, the volume of a drop of liquid gallium is 0.05ml~0.1ml. Under ideal conditions, the shape of the drop is a sphere. According to the sphere volume formula , it can be calculated that the diameter of the droplet is about 200μm~500μm. Due to the high surface free energy of liquid metal gallium, multiple droplets can merge with each other to form larger droplets after contact. The larger the droplet, the heavier it is. Due to the large contact angle between the droplet and the inner coating 1, its adhesion to the surface of the inner coating 1 is also poor, so it is easier to roll off the surface of the inner coating 1. Figure 3The figure shows a schematic diagram of liquid metal gallium droplets 4 of different diameters on the surface of the anti-wetting layer 2. By limiting the size of the first protruding structures 21 and controlling the distance between adjacent first protruding structures 21 to be smaller than the diameter of the liquid metal gallium droplets 4, the liquid metal gallium droplets can be positioned on the surface of the inner coating 1 with the support of the first protruding structures 21. At the same time, by limiting the size of the second protruding structures 22 and the distance between adjacent second protruding structures 22, even if there are liquid metal gallium droplets 4 with a diameter smaller than the distance between adjacent first protruding structures 21, the second protruding structures 22 arranged between the first protruding structures 21 can provide good support for them, thereby preventing liquid metal gallium droplets 4 with smaller diameters from adhering to the surface of the inner coating 1.

[0073] In one embodiment, if Figure 4 As shown, a plurality of nano-protrusion structures 23 are provided on the surface of each of the first protrusion structure 21 and the second protrusion structure 22 away from the inner coating 1 .

[0074] Furthermore, the shapes of the nano-protrusion structure 23 include triangular pyramid, pentagon, hexagon, and claw shape.

[0075] Furthermore, the size of the nano-protrusion structure 23 is 1nm~100nm, for example: 1nm, 5nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm or 100nm; the height of the nano-protrusion structure 23 is 1nm~100nm, for example: 1nm, 5nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm or 100nm.

[0076] Specifically, the shape of the nano-protrusion structure 23 can be regular or irregular, such as Figure 5 As shown, Figure 5 (a) is a schematic diagram of providing a pentagonal nano-protrusion structure 23 on the surface of the first protrusion structure 21. Figure 5(b) is a schematic diagram of pyramidal nano-protrusions 23 disposed on the surface of the first protrusions 21. The nano-protrusions 23 are all nanometer-sized, similar to the regularly arranged hillocks (i.e., the first and second protrusions 21, 22) formed on the surface of the inner film 1. The nano-protrusions 23 on top of the hillocks resemble a raised bunker roof. The gaps between the hillocks are filled with air, forming an extremely thin, nanometer-sized layer of air. Because the gallium metal droplets are relatively large compared to these microstructures, the protrusions provide support for the gallium metal droplets. When the liquid gallium metal droplets land on the surface of the inner film 1, they are separated by a nanometer layer of air and can only make contact with the protrusions and the bunker roof at a few points, preventing further wetting. This increases the contact angle and reduces the amount of liquid gallium metal adhered.

[0077] Based on the anti-infiltration structure provided in the above embodiment, the embodiment of the present application further provides a containing device with an anti-infiltration function, such as Figure 6 As shown, the containing device with anti-infiltration function includes: a liquid containing container 3 and the anti-infiltration structure provided by the above embodiment, and the anti-infiltration structure is arranged on the inner wall of the liquid containing container 3.

[0078] In one embodiment, the inner coating 1 in the anti-wetting structure is adsorbed on the inner wall of the liquid container 3 by electrostatic adsorption.

[0079] Furthermore, the material of the inner film 1 is the same as that of the liquid container 3 .

[0080] By subjecting the inner film 1 to electrostatic treatment and adhering the inner film 1 to the surface of the inner wall of the liquid holding container 3 under a vacuum environment, there is no need to use cross-linking agents or adhesives containing volatile organic substances to adhere the inner film 1 to the inner wall of the liquid holding container 3. This prevents the presence of bubbles or impurities between the inner film 1 and the inner wall of the liquid holding container 3, and also avoids the inner film 1 from falling off due to the failure of the cross-linking agent or adhesive due to long-term use. In addition, the inner film 1 is made of the same material as the liquid holding container 3, so that its electrical properties are consistent with those of the surface of the liquid holding container 3, thereby ensuring that the electrostatic adsorption process is more stable and effective.

[0081] For example, if the material of the liquid holding container 3 is PVC, the material of the inner film 1 is also PVC; since PVC, PE, PP, ABS and other plastic materials are common plastic materials on the market, they are relatively easy to purchase or customize and are cheap, so the cost of the holding container with anti-infiltration function provided by this application is also relatively low.

[0082] By attaching the inner film 1 to the inner wall of the liquid container 3 and utilizing the raised structures on the anti-wetting layer 2 to reduce the adhesion between the liquid gallium and the inner film 1, the problem of the liquid gallium hanging on the container wall during storage and storage is effectively resolved. This improves the utilization rate of the liquid gallium and reduces waste. Furthermore, the need for cleaning the container inner wall with acid or alkali solutions is eliminated, thus avoiding the risk of liquid gallium contamination. Furthermore, by selecting the inner film 1 made of the same material as the liquid container 3, the inner film 1 can be better adhered to the inner wall of the liquid container 3.

[0083] The technical solution of the present application is described in more detail below in conjunction with a plurality of embodiments. However, it should be understood that the following embodiments are only for explaining and illustrating the technical solution and do not limit the scope of the present application. Example 1

[0084] This embodiment provides an anti-infiltration structure, which specifically includes an inner coating and an anti-infiltration layer arranged on the surface of the inner coating; the anti-infiltration layer includes a plurality of first protrusion structures and a plurality of second protrusion structures.

[0085] The thickness of the anti-infiltration structure is 0.3mm, and the materials of the inner coating and the anti-infiltration layer are both PVC materials.

[0086] A plurality of first protrusion structures are arranged on the surface of the inner film in an equilateral triangle array.

[0087] The first protruding structure is in the shape of a cuboid, the size of the first protruding structure is 80 μm, the height of the first protruding structure is 150 μm, and the distance between two adjacent first protruding structures is 100 μm.

[0088] Three second protrusion structures are spaced apart between two adjacent first protrusion structures.

[0089] The second protruding structure is in the shape of a cuboid, and the size of the second protruding structure is 10 μm; the height of the second protruding structure 22 is 20 μm; and the distance between two adjacent second protruding structures is 10 μm. Example 2

[0090] This embodiment provides an anti-infiltration structure, which specifically includes an inner coating and an anti-infiltration layer arranged on the surface of the inner coating; the anti-infiltration layer includes a plurality of first protrusion structures and a plurality of second protrusion structures.

[0091] The thickness of the anti-infiltration structure is 0.4mm, and the materials of the inner coating and the anti-infiltration layer are both PVC materials.

[0092] A plurality of first protrusion structures are arranged on the surface of the inner film in an equilateral triangle array.

[0093] The first protruding structure is in the shape of a cuboid, has a size of 90 μm, a height of 175 μm, and a distance between two adjacent first protruding structures of 140 μm.

[0094] Four second protrusion structures are spaced apart between two adjacent first protrusion structures.

[0095] The second protruding structure is in the shape of a cuboid, and the size of the second protruding structure is 30 μm; the height of the second protruding structure 22 is 40 μm; and the distance between two adjacent second protruding structures is 15 μm. Example 3

[0096] This embodiment provides an anti-infiltration structure, which specifically includes an inner coating and an anti-infiltration layer arranged on the surface of the inner coating; the anti-infiltration layer includes a plurality of first protrusion structures and a plurality of second protrusion structures.

[0097] The thickness of the anti-infiltration structure is 0.5mm, and the materials of the inner coating and the anti-infiltration layer are both PVC materials.

[0098] A plurality of first protrusion structures are arranged on the surface of the inner film in an equilateral triangle array.

[0099] The first protruding structure is in the shape of a cuboid, has a size of 100 μm, a height of 200 μm, and a distance between two adjacent first protruding structures is 180 μm.

[0100] Five second protrusion structures are spaced apart between two adjacent first protrusion structures.

[0101] The second protruding structure is in the shape of a cuboid, and the size of the second protruding structure is 50 μm; the height of the second protruding structure 22 is 60 μm; and the distance between two adjacent second protruding structures is 20 μm. Example 4

[0102] This embodiment provides an anti-infiltration structure, which specifically includes an inner coating and an anti-infiltration layer arranged on the surface of the inner coating; the anti-infiltration layer includes multiple first protrusion structures and multiple second protrusion structures, and multiple nano-protrusion structures are arranged on the surfaces of the first protrusion structures and the second protrusion structures.

[0103] The thickness of the anti-infiltration structure is 0.5mm, and the materials of the inner coating and the anti-infiltration layer are both PVC materials.

[0104] A plurality of first protrusion structures are arranged on the surface of the inner film in an equilateral triangle array.

[0105] The first protruding structure is in the shape of a cuboid, has a size of 100 μm, a height of 200 μm, and a distance between two adjacent first protruding structures is 180 μm.

[0106] Five second protrusion structures are spaced apart between two adjacent first protrusion structures.

[0107] The second protruding structure is in the shape of a cuboid, and the size of the second protruding structure is 50 μm; the height of the second protruding structure 22 is 60 μm; and the distance between two adjacent second protruding structures is 20 μm.

[0108] The shape of the nano-protrusion structure is a pentagon, the size of the nano-protrusion structure is 100 nm, and the height of the nano-protrusion structure is 100 nm.

[0109] like Figure 7 Shown are optical photographs of the liquid metal gallium provided in this application on the surface of the anti-wetting structure provided in Example 3 and Example 4, wherein: Figure 7 (a) is an optical photograph of liquid metal gallium on the surface of the anti-wetting structure provided in Example 3. Figure 7 (b) is an optical photograph of liquid metal gallium on the surface of the anti-wetting structure provided in Example 4.

[0110] from Figure 7 It can be seen that the same liquid metal gallium droplet has different adhesion levels in the two anti-wetting structures. Figure 7 (a) The spherical shape of the liquid metal gallium droplet is poor, and the contact angle between the liquid metal gallium droplet and the inner coating is small, indicating that the liquid metal gallium still has the risk of adhesion on the surface of the inner coating. Figure 7 (b) The liquid metal gallium droplet has a better spherical shape and a larger contact angle between the liquid metal gallium droplet and the inner coating, indicating that the liquid metal gallium has a lower adhesion to the surface of the inner coating. By comparing Example 3 with Example 4, it can be seen that the provision of the nano-protrusion structure can further increase the contact angle between the liquid metal gallium and the inner coating.

[0111] like Figure 8 The figure shows a comparison of the contact angles of liquid metal gallium when it is placed in different liquid containers. The vertical axis is the contact angle (CA). Figure 8 (a) is the contact angle between the liquid metal gallium and the container when the liquid metal gallium is directly placed in a liquid container without an anti-wetting structure; Figure 8 (b) is the contact angle between the liquid metal gallium and the inner coating when the liquid metal gallium is placed in a liquid container with the anti-wetting structure provided in Example 3 attached to the inner wall; Figure 8(c) in the figure is the contact angle between the liquid metal gallium and the inner coating when the liquid metal gallium is placed in a liquid holding container with the anti-wetting structure provided in Example 4 attached to the inner wall.

[0112] from Figure 8 It can be seen that when liquid metal gallium is directly placed in a liquid holding container without any treatment, the contact angle between the container and the liquid metal gallium droplet is 81.2°, which shows partial infiltration; after an inner coating comprising a first protrusion structure and a second protrusion structure is provided inside the liquid holding container, the contact angle between the inner coating and the liquid metal gallium droplet is 142.6°; this indicates that the anti-infiltration structure provided in Examples 1 to 3 of the present application can effectively increase the contact angle between the liquid metal gallium and the inner coating, thereby effectively preventing the liquid metal gallium from hanging on the inner wall of the container; in addition, after an inner coating comprising a first protrusion structure, a second protrusion structure and a nano-protrusion structure is provided in the liquid holding container, the contact angle between the inner coating and the liquid metal gallium is 158.5°; this indicates that the anti-infiltration structure provided in Example 4 of the present application can further increase the contact angle between the liquid metal gallium and the inner coating, thereby reducing the amount of liquid metal gallium adhered, by providing a nano-scale nano-protrusion structure on the surface of the first protrusion structure and the second protrusion structure.

[0113] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this application.

Claims

1. An anti-infiltration structure, characterized in that: Used to prevent liquid from infiltrating the liquid holding container, the anti-infiltration structure includes: An inner coating, provided on the inner wall of the liquid holding container; an anti-wetting layer, disposed on the surface of the inner coating, comprising a plurality of first protrusion structures and a plurality of second protrusion structures; Among them, the multiple first protrusion structures are distributed at intervals on the surface of the inner membrane, and multiple second protrusion structures are distributed at intervals between two adjacent first protrusion structures; the height of the first protrusion structure is greater than the height of the second protrusion structure, and the distance between two adjacent second protrusion structures is less than the diameter of the liquid.

2. The anti-wetting structure according to claim 1, characterized in that: The distance between two adjacent first protrusion structures is smaller than the diameter of the liquid; and / or The size of the first protruding structure is larger than the size of the second protruding structure.

3. The anti-wetting structure according to claim 1, characterized in that: A plurality of nano-protrusion structures are provided on the surfaces of the first protrusion structure and the second protrusion structure on the side away from the inner coating.

4. The anti-wetting structure according to claim 3, characterized in that: The shapes of the nano-protrusion structures include triangular pyramid, pentagon, hexagon, and claw shape; and / or The size of the nano-protrusion structure is 1 nm to 100 nm; the height of the nano-protrusion structure is 1 nm to 100 nm.

5. The anti-wetting structure according to claim 1, characterized in that: The plurality of first protrusion structures are arranged in an equilateral triangle array on the surface of the inner coating; and / or Each of the first protruding structures is in the shape of a cylinder or a cuboid; and / or There are 3 to 5 second protrusion structures spaced apart between two adjacent first protrusion structures; and / or Each of the second protruding structures is in the shape of a cylinder or a cuboid.

6. The anti-wetting structure according to claim 1, characterized in that: The thickness of the anti-infiltration structure is 0.3 mm to 0.5 mm; and / or The height of the first protruding structure is 1 / 4 to 1 / 2 of the thickness of the anti-wetting structure.

7. The anti-wetting structure according to claim 1, characterized in that: The size of the first protruding structure is 80 μm to 100 μm; the height of the first protruding structure is 150 μm to 200 μm; the distance between two adjacent first protruding structures is 100 μm to 180 μm; and / or The size of the second protruding structure is 10 μm to 50 μm; the height of the second protruding structure is 20 μm to 60 μm; and the distance between two adjacent second protruding structures is 10 μm to 20 μm.

8. The anti-wetting structure according to claim 1, characterized in that: The material of the anti-wetting layer is the same as that of the inner coating.

9. A container with anti-infiltration function, characterized in that: include: Liquid containers; The anti-infiltration structure according to any one of claims 1 to 8, wherein the anti-infiltration structure is arranged on the inner wall of the liquid holding container.

10. The holding device with anti-infiltration function according to claim 9, characterized in that: The inner coating in the anti-wetting structure is electrostatically adsorbed on the inner wall of the liquid container; and / or The material of the inner coating is the same as that of the liquid holding container.

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