Corrosion-resistant vacuum cup and preparation method thereof

Abstract

The invention discloses a corrosion-resistant vacuum cup and a preparation method thereof, and aims to solve the problem of poor corrosion resistance of a vacuum cup. According to the technical scheme, the vacuum cup is characterized by comprising a vacuum cup body, the vacuum cup body is made of stainless steel materials, and the inner wall of the vacuum cup body is coated with a corrosion-resistant coating; the corrosion-resistant coating is prepared from the following components in parts by mass: 48 to 56 parts of waterborne polyurethane, 26 to 32 parts of perfluorooctyltrichlorosilane, 12 to 16 parts of composite hollow glass bead components and 8 to 10 parts of antibacterial paint. The perfluorooctyltrichlorosilane is adopted as the super-hydrophobic coating, due to the fact that the inner wall of the vacuum cup has microdefects, the perfluorooctyltrichlorosilane can be effectively loaded on the inner wall of the vacuum cup body to form a firm film layer, hydrophobic groups in the perfluorooctyltrichlorosilane enable the film layer to obtain a hydrophobic effect, and the super-hydrophobic coating has the super-hydrophobic effect. The super-hydrophobic film layer reduces the surface energy on the inner wall of the vacuum cup body, and reduces the possibility that acidic and alkaline drinks are loaded and corrode the vacuum cup body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum cups, more particularly, it relates to a corrosion-resistant vacuum cup and a preparation method thereof. BACKGROUND

[0002] Traditional vacuum cups are generally made of stainless steel material and are mainly used for holding hot water or ice water. However, the stainless steel material usually contains heavy metal elements such as nickel, chromium, manganese, cadmium, and lead. When holding acidic or alkaline beverages for a long time, the heavy metal elements in the vacuum cup are more likely to precipitate, which not only makes the beverages lose their flavor and deteriorate, but also more easily causes harm to human health. In addition, acidic or alkaline beverages are more likely to corrode stainless steel, which shortens the service life of the vacuum cup. In summary, stainless steel vacuum cups are not suitable for holding milk, carbonated beverages, fruit juice, tea, and the like for a long time, which greatly limits the applicability of the vacuum cup.

[0003] Therefore, a solution needs to be proposed to solve this problem. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a corrosion-resistant vacuum cup and a preparation method thereof, which enhances the corrosion resistance of the vacuum cup body by setting a corrosion-resistant coating.

[0005] The above technical purpose of the present application is achieved by the following technical solution: a corrosion-resistant vacuum cup, comprising a vacuum cup body made of stainless steel material, wherein the inner wall of the vacuum cup body is coated with a corrosion-resistant coating, and the corrosion-resistant coating comprises the following components by mass fraction: waterborne polyurethane 48-56 parts, perfluorooctyltrichlorosilane 26-32 parts, composite hollow glass microsphere component 12-16 parts, and antibacterial coating 8-10 parts.

[0006] The present application is further provided that: the composite hollow glass microsphere component comprises hollow glass microspheres and modified graphene.

[0007] The present application is further provided that: the composite hollow glass microsphere component is prepared by the following method: hollow glass microspheres are added to a hydrochloric acid solution, washed after magnetic stirring, and dried to obtain acidified glass microspheres; modified graphene is added to a sodium dodecylbenzenesulfonate aqueous solution, ultrasonicated to obtain a modified graphene suspension, the acidified glass microspheres are added to the modified graphene suspension, and magnetic stirring is performed to obtain a composite suspension, the composite suspension is suction filtered, and dried to obtain the composite hollow glass microsphere component.

[0008] The application is further provided with a preparation method of the antibacterial coating, which comprises the following steps: (1) first silver sulfide sol preparation: uniformly mixing silver nitrate and deionized water in a mass ratio of 5-10:70-80 under stirring, adding sodium thiosulfate solution dropwise, stirring for 10-15 minutes, and obtaining the first silver sulfide sol; (2) second silver sulfide sol preparation: aging the silver sulfide sol obtained in step (1) at 70-80 degrees for 3-5 days to obtain the second silver sulfide sol; (3) composite silver sulfide sol preparation: mixing the first silver sulfide sol obtained in step (1) and the second silver sulfide sol obtained in step (2) in a mass ratio of 1:2-3 to obtain the composite silver sulfide sol; (4) preparation of the inner container coating of the vacuum cup: grinding silicon sol, deionized water, ferroferric oxide, glass powder and hydroxyl silicone oil in a nanoball mill for 3-5 hours to obtain a slurry, then adding the composite silver sulfide sol prepared in step (3) into the slurry, stirring uniformly, adding formic acid to adjust the pH value of the slurry to 2-3, then adding a silane coupling agent, and continuing to stir for 8-10 hours to obtain the antibacterial coating.

[0009] The above technical purposes of the application are also achieved by the following technical scheme: a preparation method of a corrosion-resistant vacuum cup, comprising the following steps: applying a corrosion-resistant coating to the surface of the vacuum cup, drying, forming a corrosion-resistant coating on the surface of the inner container of the vacuum cup, obtaining a corrosion-resistant inner container, and assembling the corrosion-resistant inner container and the outer shell to obtain the vacuum cup body.

[0010] In summary, the application has the following beneficial effects:

[0011] 1. The application uses perfluorooctyltrichlorosilane as the super-hydrophobic coating, and the perfluorooctyltrichlorosilane can be effectively loaded on the inner wall of the vacuum cup body due to the micro-defects on the inner wall of the vacuum cup, forming a relatively firm film layer, and the hydrophobic groups in the perfluorooctyltrichlorosilane make the film layer have a hydrophobic effect, i.e., the super-hydrophobic film layer reduces the surface energy on the inner wall of the vacuum cup body, reducing the possibility of loading and corroding the vacuum cup body by acidic or alkaline drinks;

[0012] 2. The insoluble nano silver sulfide particles are used as the antibacterial agent to avoid pollution of the liquid contained in the vacuum cup due to the dissolution of the antibacterial agent. DETAILED DESCRIPTION

[0013] In order for those skilled in the art to better understand the technical solutions of the application, the application will be further described in detail below with reference to specific embodiments, and it should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

[0014] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0015] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0016] The present application will be described in detail below.

[0017] A kind of corrosion-resistant vacuum cup, including vacuum cup body, vacuum cup body adopts stainless steel material, corrosion-resistant coating is coated on the inner wall of vacuum cup body, corrosion-resistant coating includes the following components by mass fraction: water-based polyurethane 48-56 parts, perfluorooctyltrichlorosilane 26-32 parts, composite hollow glass microsphere component 12-16 parts, antibacterial paint 8-10 parts.

[0018] The composite hollow glass microsphere component includes hollow glass microspheres and modified graphene.

[0019] The composite hollow glass microsphere component is prepared by the following method: hollow glass microspheres are added to a hydrochloric acid solution, washed by magnetic stirring, and dried to obtain acidified glass microspheres; modified graphene is added to a sodium dodecylbenzenesulfonate aqueous solution, ultrasonicated to obtain a modified graphene suspension, acidified glass microspheres are added to the modified graphene suspension, and a composite suspension is obtained by magnetic stirring. The composite suspension is suction filtered and dried to obtain the composite hollow glass microsphere component.

[0020] The preparation method of the antibacterial coating comprises the following steps: (1) first silver sulfide sol preparation: uniformly mixing silver nitrate and deionized water in a mass ratio of 5-10:70-80 under stirring, adding sodium thiosulfate solution dropwise, stirring for 10-15 minutes, and obtaining the first silver sulfide sol; (2) second silver sulfide sol preparation: aging the silver sulfide sol obtained in step (1) at 70-80 degrees for 3-5 days to obtain the second silver sulfide sol; (3) composite silver sulfide sol preparation: mixing the first silver sulfide sol obtained in step (1) and the second silver sulfide sol obtained in step (2) in a mass ratio of 1:2-3 to obtain the composite silver sulfide sol; (4) preparation of the inner container coating of the vacuum cup: grinding silicon sol, deionized water, ferroferric oxide, glass powder and hydroxyl silicone oil in a nanoball mill for 3-5 hours to obtain a slurry, then adding the composite silver sulfide sol prepared in step (3) into the slurry, stirring uniformly, adding formic acid to adjust the pH value of the slurry to 2-3, then adding a silane coupling agent, and continuing to stir for 8-10 hours to obtain the antibacterial coating.

[0021] A preparation method of a corrosion-resistant vacuum cup comprises the following steps: applying a corrosion-resistant coating to the surface of the vacuum cup, drying, so that a corrosion-resistant coating is formed on the surface of the inner container of the vacuum cup, obtaining a corrosion-resistant inner container, and assembling the corrosion-resistant inner container and the outer shell to obtain the vacuum cup body.

[0022] The present application adopts perfluorooctyltrichlorosilane as the super-hydrophobic coating, and the perfluorooctyltrichlorosilane can be effectively loaded on the inner wall of the vacuum cup body due to the micro-defects on the inner wall of the vacuum cup, so that a relatively firm film layer is formed, and the hydrophobic group in the perfluorooctyltrichlorosilane makes the film layer obtain the hydrophobic effect, that is, the super-hydrophobic film layer reduces the surface energy on the inner wall of the vacuum cup body, and reduces the possibility of corrosion of the vacuum cup body by acidic or alkaline drinks;

[0023] The water-insoluble nano silver sulfide particles are used as the antibacterial agent to avoid pollution of the liquid in the vacuum cup due to the dissolution of the antibacterial agent, the silver sulfide is safe and environmentally friendly as the antibacterial agent, and the biocompatibility is safer than that of nano silver and monovalent copper ions. Even if a small amount of the silver sulfide is ingested by the human body, there is no safety hazard. On the other hand, the silver sulfide has a deodorizing effect, which can improve the use comfort of the vacuum cup. The nano silver sulfide particles with different particle sizes are used to construct a micro-nano hydrophobic structure, so that the coating surface has uniform and good hydrophobic properties, which helps to improve the self-cleaning performance of the vacuum cup inner container coating;

[0024] The composite hollow glass microsphere component is prepared by hollow glass microspheres and modified graphene, the hollow glass microspheres have the structural characteristics of hollow, a vacuum state is formed, the heat conduction of gas molecules can be effectively reduced, the heat conduction coefficient is greatly reduced, and the heat preservation and heat insulation performance of the whole system is further improved; by being combined with the modified graphene, the thermal conductivity of the hollow glass microspheres can be further reduced, so that the heat preservation performance of the vacuum cup is synergistically improved.

[0025] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments only, any technical solution belonging to the idea of the present application shall belong to the protection scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the present application shall also be considered as the protection scope of the present application.

Claims

1. A corrosion-resistant thermos cup, characterized in that: The product includes a thermos body made of stainless steel. The inner wall of the thermos body is coated with a corrosion-resistant coating, which comprises the following components in parts by weight: 48-56 parts of water-based polyurethane, 26-32 parts of perfluorooctyltrichlorosilane, 12-16 parts of composite hollow glass microspheres, and 8-10 parts of antibacterial coating.

2. The corrosion-resistant thermos cup according to claim 1, characterized in that: The composite hollow glass microspheres consist of hollow glass microspheres and modified graphene.

3. The corrosion-resistant thermos cup according to claim 1, characterized in that: The composite hollow glass microsphere component is prepared by the following method: hollow glass microspheres are added to hydrochloric acid solution, magnetically stirred, washed, and dried to obtain acidified glass microspheres; modified graphene is added to sodium dodecylbenzenesulfonate aqueous solution, ultrasonically to obtain modified graphene suspension, acidified glass microspheres are added to modified graphene suspension, magnetically stirred to obtain composite suspension, the composite suspension is filtered, and dried to obtain composite hollow glass microsphere component.

4. The corrosion-resistant thermos cup according to claim 1, characterized in that: The preparation method of the antibacterial coating includes the following steps: (1) Preparation of the first silver sulfide sol: Under stirring conditions, silver nitrate and deionized water are mixed evenly at a mass ratio of 5-10:70-80, sodium thiosulfate solution is added dropwise, and the mixture is stirred for 10-15 minutes to obtain the first silver sulfide sol; (2) Preparation of the second silver sulfide sol: The silver sulfide sol obtained in step (1) is aged at 70-80 degrees Celsius for 3-5 days to obtain the second silver sulfide sol; (3) Preparation of the composite silver sulfide sol: The silver sulfide sol is prepared at a mass ratio of 1:2-3. For example, the first silver sulfide sol obtained in step (1) is mixed with the second silver sulfide sol obtained in step (2) to obtain a composite silver sulfide sol; (4) Preparation of coating for the inner liner of the thermos cup: the silica sol, deionized water, iron oxide, glass powder and hydroxyl silicone oil are ground in a nanoball mill for 3 to 5 hours to obtain a slurry. Then the composite silver sulfide sol prepared in step (3) is added to the slurry and stirred evenly. Formic acid is added to adjust the pH value of the slurry to 2 to 3. Then silane coupling agent is added and stirring is continued for 8 to 10 hours to obtain an antibacterial coating.

5. A method for preparing a corrosion-resistant thermos cup according to any one of claims 1-4, characterized in that: The process includes the following steps: applying a corrosion-resistant coating to the surface of the thermos cup, drying it to form a corrosion-resistant coating on the surface of the inner liner of the thermos cup, thus obtaining a corrosion-resistant inner liner, and then assembling the corrosion-resistant inner liner and the outer shell to prepare the thermos cup body.