A lithography zero-coating non-stick metal kitchenware and its preparation process

Abstract

The present invention discloses a lithography zero - coating non - stick metal kitchenware and its preparation process. In the present invention, a biomimetic lotus leaf micron - level non - stick structural morphology is lithographed on the surface of the metal kitchenware substrate, then a physical vapor deposition amorphous composite material thin film is carried out on the surface of the lithographed area, and then a biomimetic lotus leaf nano - level non - stick structural morphology is lithographed on the amorphous composite material thin film. The amorphous composite material thin film includes a Ti or Zr metal layer, a TiAlCrZrCN layer, and a SiTiAlCrZrCN layer deposited in sequence from the inside to the outside on the metal kitchenware substrate. The preparation process of the present invention is to first lithograph the biomimetic lotus leaf micron - level morphology on the surface of the metal kitchenware by using lithography technology, then carry out physical vapor deposition in the micron - lithographed area to obtain an amorphous composite material thin film, and then lithograph the lotus leaf nano - level non - stick morphology. The kitchenware of the present invention has high hardness, high wear resistance, high corrosion resistance, high temperature resistance, easy to clean, no color change, no organic chemical coating, and persistent non - stick property.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen utensils, and in particular to a lithography zero - coating non - stick metal kitchen utensil and its preparation process. Background Art

[0002] At present, in industrial production applications, various metal kitchen utensil substrates have a wide range of applications, such as stainless - steel spatulas and spoons, stainless - steel pots, magnesium - alloy pots, aluminum pots, titanium pots, iron pots, etc. However, the non - stick performance of various conventional metal substrates is very poor. For example, during the cooking process, the surface of stainless - steel cookware will change color and adhere to a large amount of food ingredients and oil stains, making it difficult to clean. At the same time, austenitic and ferritic stainless steels cannot be hardened while ensuring food safety, and the hardness of their substrates is insufficient. Currently, the main solution is to chemically etch fine concave - convex textures on the surface of the stainless - steel substrate. The protruding parts form a honeycomb - like network structure without a coating, and the non - stick coating only covers the recesses of the texture, reducing the contact between the spatula and the coating, effectively preventing the non - stick coating from falling off, so as to achieve the effect of not being easily sticky. However, its non - stick principle is still the PTFE coating material. The process has a large environmental pollution, and the PTFE coating cannot withstand high temperatures for a long time. Once it fails due to high temperature, a large amount of oil stains will adhere to the cookware, making it difficult to clean. In addition, the inner surface of this type of product is polished, which will damage the paint surface of the coating to a certain extent, resulting in the non - stick performance not meeting expectations; the honeycomb - like network structure has low hardness and unstable performance, and the proportion of complaints about coating peeling is large; there are etched textures on the inner side of the pot, which is uneven, resulting in unsmooth spatula use during stir - frying, very loud noise, and troublesome cleaning, and it is easy to hide dirt and grime. Summary of the Invention

[0003] The purpose of the present invention is to propose a high - hardness, high - wear - resistance, high - corrosion - resistance, high - temperature - resistant, easy - to - clean, non - discoloring, metal kitchen utensil without an organic chemical coating and with persistent non - stick performance and its preparation process in view of the above - mentioned deficiencies of the prior art.

[0004] A lithography zero - coating non - stick metal kitchen utensil of the present invention has a bionic lotus - leaf micron - level non - stick structure morphology lithographed on the surface of the metal kitchen utensil substrate. Then, a physical vapor deposition amorphous composite material thin film is carried out on the surface of the lithographed area. Then, a bionic lotus - leaf nano - level non - stick structure morphology is lithographed on the amorphous composite material thin film. The amorphous composite material thin film includes a Ti or Zr metal layer, a TiAlCrZrCN layer, and a SiTiAlCrZrCN layer sequentially deposited from the inside to the outside on the metal kitchen utensil substrate.

[0005] Further, the diameter of the lithographed bionic lotus - leaf micron - level structure morphology is 1 - 50 um, the depth is 1 - 100 um, and the spacing is 1 - 100 um.

[0006] Further, the thickness of the amorphous composite material thin film is not less than 3 um.

[0007] Furthermore, the diameter of the lithographed bionic lotus leaf nanostructure morphology is 1 - 999 nm, the depth is 1 - 999 nm, and the spacing is 1 - 999 nm.

[0008] Furthermore, the metal kitchenware substrate is one of a stainless steel substrate, a magnesium alloy substrate, a titanium substrate, an iron substrate, an aluminum substrate, and a metal composite material substrate.

[0009] Furthermore, the stainless steel substrate is 304 / 316L austenitic stainless steel or 430 ferritic stainless steel.

[0010] A preparation process of a lithographed zero - coating non - stick metal kitchenware includes the following steps:

[0011] S1. Mechanically polish the metal kitchenware substrate;

[0012] S2. Use a supercomputer to establish a bionic lotus leaf model, and then use light energy to etch a bionic lotus leaf micron - level non - stick structure morphology on the inner side of the metal kitchenware substrate;

[0013] S3. Put the metal kitchenware substrate after completing the lithographed bionic lotus leaf micron - level morphology into a vacuum coating equipment. In an argon environment, arc target discharge generates ions and electrons. Use an auxiliary anode to accelerate the separated electrons to form a high - energy electron beam, which bombards and ionizes the working gas (Ar), and argon ions perform plasma etching and cleaning on the surface of the metal kitchenware substrate;

[0014] S4. First deposit a layer of Ti or Zr metal layer on the surface of the metal kitchenware substrate with a bionic lotus leaf micron - level non - stick structure morphology by vacuum arc evaporation, then deposit a TiAlCrZrCN layer, and then form a Si - doped SiTiAlCrZrCN thin film on the surface of the TiAlCrZrCN layer by medium - frequency magnetron sputtering method; after the composite material thin film deposition thickness reaches 3 μm, take out the metal kitchenware substrate, and the amorphous composite material thin film deposition is completed;

[0015] S5: Use a supercomputer to establish a bionic lotus leaf model, and then use light energy to etch a bionic lotus leaf nano - level non - stick structure morphology on the surface of the metal kitchenware substrate with an amorphous composite material thin film.

[0016] Furthermore, the metal kitchenware is a pot.

[0017] Furthermore, the pot is a double - bottom pot or a multi - layer steel pot.

[0018] The lithographed zero - coating non - stick metal kitchenware of the present invention has the following advantages:

[0019] 1. The micro-nano non-stick morphology of the micro-bionic lotus leaf uses lithography technology, and the amorphous composite material film is prepared by physical vapor deposition. The production process is environmentally friendly and safe. Compared with surface treatment methods such as spraying fluorocarbon paint, it does not cause pollution to the environment and is beneficial to industrial production.

[0020] 2. The amorphous composite material film does not contain chemical coatings and has the properties of oxidation resistance and corrosion resistance. The oxidation resistance temperature is ≥900 °C. Therefore, it can solve the problems of discoloration of metal cookware during cooking, peeling of chemical coatings, and food hygiene and safety problems on the food contact surface.

[0021] 3. The amorphous composite material film can minimize the surface energy of the metal substrate surface, and can significantly increase the properties of the cookware surface such as resistance to adhesion of ingredients / oil stains and easy cleaning of water stains. After the lithographed lotus leaf micro-nano non-stick morphology, the non-stick performance is further greatly improved.

[0022] 4. The amorphous composite material film can increase the hardness of the metal substrate itself by 10 - 15 times. The hardness of the composite material film is ≥3000 HV, which can effectively prevent the lithographed lotus leaf micro-nano non-stick morphology from being damaged by iron shovels and steel wire balls, and the non-stick durability far exceeds that of non-stick pans with PTFE coatings. Detailed implementation mode

[0023] The following are specific embodiments of the present invention and in combination with technical parameters, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0024] A preparation process of a lithographed zero-coating non-stick metal cookware includes the following steps:

[0025] S1. Mechanically polish the metal cookware substrate.

[0026] S2. Use a supercomputer to establish a lotus leaf model, and then use light energy to etch a bionic lotus leaf micron-level non-stick structure morphology on the inner side of the metal cookware substrate.

[0027] S3. Put the metal cookware substrate after lithographing the bionic lotus leaf micron morphology into a vacuum coating equipment. In an argon environment, arc target discharge generates ions and electrons. Use an auxiliary anode to accelerate the separated electrons to form a high-energy electron beam, which bombards and ionizes the working gas (Ar), and argon ions perform plasma etching and cleaning on the surface of the metal cookware substrate.

[0028] S4. Deposit a layer of Ti or Zr metal on the surface of the metal kitchenware substrate with a bionic lotus leaf microscale non-stick structural morphology by vacuum arc evaporation, then deposit a TiAlCrZrCN layer, and then form a Si-doped SiTiAlCrZrCN thin film on the surface of the TiAlCrZrCN layer by medium-frequency magnetron sputtering method; after the composite material thin film deposition thickness reaches 3 μm, take out the metal kitchenware substrate, and the amorphous composite material thin film deposition is completed;

[0029] S5: Establish a bionic lotus leaf model using a supercomputer, and then use light energy to etch a bionic lotus leaf nanoscale non-stick structural morphology on the surface of the metal kitchenware substrate with an amorphous composite material thin film.

[0030] The following examples are used to illustrate a lithography zero-coating non-stick metal kitchenware and its preparation process

[0031] Example 1:

[0032] First, mechanically polish the stainless steel cookware. Preferably, in this example, the stainless steel substrate is made of 304 stainless steel; establish a bionic lotus leaf model using a supercomputer, use light energy to etch a bionic lotus leaf microscale non-stick structural morphology on the inner side of the metal kitchenware substrate, and then put it into a vacuum coating machine. In an argon environment, the arc target discharges to generate ions and electrons, and the separated electrons are accelerated using an auxiliary anode to form a high-energy electron beam, which bombards and ionizes the working gas (Ar). The argon ions perform plasma etching and cleaning on the surface of the metal kitchenware substrate. After the cleaning is completed, use the arc target and magnetron sputtering target on the vacuum coating machine to deposit a composite material thin film. After the composite material thin film deposition thickness reaches 3 μm, take out the metal kitchenware substrate, and the composite material thin film deposition is completed. The specific data table is as follows:

[0033]

[0034] Then establish a bionic lotus leaf model using a supercomputer, and then use light energy to lithographically etch a bionic lotus leaf nanoscale non-stick structural morphology on one side of the metal kitchenware substrate with an amorphous composite material thin film.

[0035] Among them, the diameter of the lithographed bionic lotus leaf microstructural morphology is 7 μm, the depth is 12 μm, and the spacing is 20 μm; the diameter of the lithographed bionic lotus leaf nanostructural morphology is 200 nm, the depth is 14 nm, and the spacing is 28 nm.

[0036] Example 2:

[0037] First, mechanically polish the magnesium alloy cookware. Then, use a supercomputer to establish a lotus leaf imitation model, and use light energy to etch a biomimetic lotus leaf micron-level non-stick structure morphology on the inner side of the metal cookware substrate. Then, place it in a vacuum coating machine. In an argon environment, the arc target discharges to generate ions and electrons. Use the auxiliary anode to accelerate the separated electrons to form a high-energy electron beam, which bombards and ionizes the working gas (Ar). The argon ions perform plasma etching and cleaning on the surface of the metal cookware substrate. After the cleaning is completed, use the arc target and magnetron sputtering target on the vacuum coating machine to deposit a composite material thin film. After the thickness of the composite material thin film reaches 3 μm, take out the metal cookware substrate, and the deposition of the composite material thin film is completed. The specific data table is as follows:

[0038]

[0039] Then, use a supercomputer to establish a lotus leaf imitation model, and then use light energy to lithographically engrave a biomimetic lotus leaf nano-level non-stick structure morphology on the surface of the metal cookware substrate with an amorphous composite material thin film.

[0040] Among them, the diameter of the lithographically engraved biomimetic lotus leaf micron structure morphology is 9 μm, the depth is 15 μm, and the spacing is 10 μm; the diameter of the lithographically engraved biomimetic lotus leaf nano structure morphology is 28 nm, the depth is 50 nm, and the spacing is 200 nm.

[0041] Example 3:

[0042] First, mechanically polish the titanium cookware. Then, use a supercomputer to establish a lotus leaf imitation model, and use light energy to etch a biomimetic lotus leaf micron-level non-stick structure morphology on the inner side of the metal cookware substrate. Then, place it in a vacuum coating machine. In an argon environment, the arc target discharges to generate ions and electrons. Use the auxiliary anode to accelerate the separated electrons to form a high-energy electron beam, which bombards and ionizes the working gas (Ar). The argon ions perform plasma etching and cleaning on the surface of the metal cookware substrate. After the cleaning is completed, use the arc target and magnetron sputtering target on the vacuum coating machine to deposit a composite material thin film. After the thickness of the composite material thin film reaches 3 μm, take out the metal cookware substrate, and the deposition of the composite material thin film is completed. The specific data table is as follows:

[0043]

[0044] Then, use a supercomputer to establish a lotus leaf imitation model, and then use light energy to lithographically engrave a biomimetic lotus leaf nano-level non-stick structure morphology on the surface of the metal cookware substrate with an amorphous composite material thin film. Among them, the diameter of the lithographically engraved biomimetic lotus leaf micron structure morphology is 5 μm, the depth is 10 μm, and the spacing is 18 μm; the diameter of the lithographically engraved biomimetic lotus leaf nano structure morphology is 28 nm, the depth is 14 nm, and the spacing is 500 nm.

[0045] Example 4:

[0046] First, mechanically polish the composite steel cookware. Preferably, in this embodiment, the inner surface of the composite steel substrate in contact with the food ingredients is made of 304 austenitic stainless steel, the intermediate transition layer is made of 1100 thermally conductive pure aluminum, and the outer surface is made of 430 ferritic stainless steel with good IH magnetic conductivity. Establish a lotus leaf imitation model using a supercomputer, and use light energy to etch the biomimetic lotus leaf micron-scale non-stick structure morphology on the inner side of the metal cookware substrate. Then, place it in a vacuum coating machine. In an argon environment, the arc target discharges to generate ions and electrons. Use an auxiliary anode to accelerate the separated electrons to form a high-energy electron beam, which bombards and ionizes the working gas (Ar). The argon ions perform plasma etching and cleaning on the surface of the metal cookware substrate. After the cleaning is completed, use the arc target and magnetron sputtering target on the vacuum coating machine to deposit a composite material thin film. After the thickness of the composite material thin film reaches 3 μm, take out the metal cookware substrate, and the deposition of the composite material thin film is completed. The specific data table is as follows:

[0047]

[0048] Then, establish a lotus leaf imitation model using a supercomputer, and then use light energy to lithographically etch the biomimetic lotus leaf nano-scale non-stick structure morphology on the surface of the metal cookware substrate with an amorphous composite material thin film; among them, the diameter of the lithographically etched biomimetic lotus leaf micron structure morphology is 20 μm, the depth is 40 μm, and the spacing is 15 μm; the diameter of the lithographically etched biomimetic lotus leaf nano structure morphology is 150 nm, the depth is 14 nm, and the spacing is 28 nm.

[0049] Example 5:

[0050] First, mechanically polish the stainless steel spoon and stainless steel spatula. Preferably, in this embodiment, the stainless steel substrate is made of 304 stainless steel; then, establish a lotus leaf imitation model using a supercomputer, and use light energy to etch the biomimetic lotus leaf micron-scale non-stick structure morphology on the inner side of the metal cookware substrate. Then, place it in a vacuum coating machine. In an argon environment, the arc target discharges to generate ions and electrons. Use an auxiliary anode to accelerate the separated electrons to form a high-energy electron beam, which bombards and ionizes the working gas (Ar). The argon ions perform plasma etching and cleaning on the surface of the metal cookware substrate. After the cleaning is completed, use the arc target and magnetron sputtering target on the vacuum coating machine to deposit a composite material thin film. After the thickness of the composite material thin film reaches 3 μm, take out the metal cookware substrate, and the deposition of the composite material thin film is completed. The specific data table is as follows:

[0051]

[0052] Then, a supercomputer is used to establish a lotus leaf imitation model, and then light energy is utilized to lithographically produce a biomimetic lotus leaf nano-scale non-stick structural morphology on the surface of the metal kitchenware substrate with an amorphous composite material film. Among them, the diameter of the lithographically produced biomimetic lotus leaf micron-scale structural morphology is 20 μm, the depth is 40 μm, and the spacing is 90 μm; the diameter of the lithographically produced biomimetic lotus leaf nano-scale structural morphology is 80 nm, the depth is 14 nm, and the spacing is 100 nm.

[0053] According to experiments, the zero-coating non-stick metal kitchenware has properties such as high hardness, high wear resistance, high corrosion resistance, high temperature resistance, easy cleaning, non-discoloration, no organic chemical coating, and long-lasting non-stick. For example, using a Vickers hardness tester to test the microhardness HV of the above Examples 1-5 are 3100, 3150, 3030, 3050, and 3060 respectively. Compared with untreated stainless steel with 200 HV and composite steel with 150 HV, its hardness has increased by 10-15 times; the oxidation resistance temperature reaches 900 °C, while the service temperature of PTFE is only 250 °C, and the high temperature resistance has increased by more than 3 times; the non-stick performance has increased by more than 3 times.

[0054] For those not covered above, the prior art applies.

[0055] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the direction of the present invention or exceed the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made based on the technical essence of the present invention to the above embodiments should be included in the protection scope of the present invention.

Claims

1. A lithographic zero - coating non - stick metal kitchenware, characterized in that: On the surface of the metal kitchenware substrate, a biomimetic lotus leaf micron - scale non - stick structural morphology is lithographed, then a physical vapor deposition amorphous composite material thin film is carried out on the surface of the lithographed area, and then a biomimetic lotus leaf nano - scale non - stick structural morphology is lithographed on the amorphous composite material thin film. The amorphous composite material thin film includes a Ti or Zr metal layer, a TiAlCrZrCN layer, and a SiTiAlCrZrCN layer deposited in sequence from the inside to the outside on the metal kitchenware substrate.

2. A lithographic zero - coating non - stick metal kitchenware as described in claim 1, characterized in that: The diameter of the lithographed biomimetic lotus leaf micron - scale structure morphology is 1 - 50 um, the depth is 1 - 100 um, and the spacing is 1 - 100 um.

3. A lithographic zero - coating non - stick metal kitchenware as described in claim 1, characterized in that: The thickness of the amorphous composite material thin film is not less than 3 um.

4. A lithographic zero - coating non - stick metal kitchenware as described in claim 1, characterized in that: The diameter of the lithographed biomimetic lotus leaf nano - scale structure morphology is 1 - 999 nm, the depth is 1 - 999 nm, and the spacing is 1 - 999 nm.

5. A lithographic zero - coating non - stick metal kitchenware as described in claim 1 characterized in that: The metal substrate is one of a magnesium alloy substrate, a stainless steel substrate, a titanium substrate, an iron substrate, and an aluminum substrate.

6. A lithographic zero - coating non - stick metal kitchenware as described in claim 5, characterized in that: The stainless steel substrate is 304 / 316L austenitic stainless steel or 430 ferritic stainless steel.

7. A preparation process of a lithographic zero - coating non - stick metal kitchenware as described in any one of claims 1 - 5, characterized in that: It includes the following steps: S1. Mechanically polish the metal kitchenware substrate; S2. Use a supercomputer to establish a lotus leaf - like model, and then use light energy to etch a biomimetic lotus leaf micron - scale non - stick structural morphology on the inner side of the metal kitchenware substrate; S3. Put the metal kitchenware substrate after lithographing the biomimetic lotus leaf micron - scale morphology into a vacuum coating equipment. In an argon environment, arc target discharge generates ions and electrons. Use an auxiliary anode to accelerate the separated electrons to form a high - energy electron beam, which bombards and ionizes the working gas Ar, and argon ions perform plasma etching and cleaning on the surface of the metal kitchenware substrate; S4. First deposit a Ti or Zr metal layer on the surface of the metal kitchenware substrate with a biomimetic lotus leaf micron - scale non - stick structural morphology by vacuum arc evaporation, then deposit a TiAlCrZrCN layer, and then form a Si - doped SiTiAlCrZrCN thin film on the surface of the TiAlCrZrCN layer by medium - frequency magnetron sputtering method; after the deposition thickness of the composite material thin film reaches 3 um, take out the metal kitchenware substrate, and the deposition of the amorphous composite material thin film is completed; S5: Use a supercomputer to establish a lotus leaf - like model, and then use light energy to etch a biomimetic lotus leaf nano - scale non - stick structural morphology on the surface of the metal kitchenware substrate with an amorphous composite material thin film.

8. A preparation process of a lithographic zero - coating non - stick metal kitchenware having the preparation process as described in claim 7, characterized in that: The metal kitchenware is a pot.

9. A preparation process of a lithography zero - coating non - stick metal cooking utensil as described in claim 8, characterized in that: the pot is a double - bottom pot or a multi - layer steel pot.

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