阅读说明：本技术 耐磨不粘涂层及其制备方法以及锅具和煮食设备 (Wear-resistant non-stick coating, preparation method thereof, pot and cooking equipment ) 是由 万鹏 曹达华 阳颖飞 王�琦 蒋坤朋 于 2018-06-22 设计创作，主要内容包括：本发明涉及电热电器技术领域,公开了一种耐磨不粘涂层及其制备方法以及锅具和煮食设备,该制备方法包括：(1)通过微弧氧化在基体的表面原位生成表面具有多孔结构的陶瓷膜层,所述多孔结构的孔的开口尺寸小于孔的内部尺寸；(2)将有机树脂涂覆在所述陶瓷膜层的表面上,使得所述陶瓷膜层表面的多孔结构的孔被所述有机树脂填充,固化；(3)对所述陶瓷膜层表面进行抛光以去除多孔结构以外区域的有机树脂。该方法得到的涂层兼具不粘性和耐磨性,同时避免了现有技术中由于采用喷涂油性陶瓷涂料施工对环境造成污染。(The invention relates to the technical field of electric heating appliances, and discloses a wear-resistant non-stick coating, a preparation method thereof, a cooker and cooking equipment, wherein the preparation method comprises the following steps: (1) generating a ceramic film layer with a porous structure on the surface in situ on the surface of the substrate through micro-arc oxidation, wherein the opening size of the pores of the porous structure is smaller than the internal size of the pores; (2) coating organic resin on the surface of the ceramic membrane layer, so that the pores of the porous structure on the surface of the ceramic membrane layer are filled with the organic resin, and curing; (3) and polishing the surface of the ceramic membrane layer to remove the organic resin in the area outside the porous structure. The coating obtained by the method has non-adhesiveness and wear resistance, and simultaneously avoids the pollution to the environment caused by the construction of spraying the oily ceramic coating in the prior art.)

1. A preparation method of a wear-resistant non-stick coating is characterized by comprising the following steps:

(1) generating a ceramic film layer with a porous structure on the surface in situ on the surface of the substrate through micro-arc oxidation, wherein the opening size of the pores of the porous structure is smaller than the internal size of the pores;

(2) coating organic resin on the surface of the ceramic membrane layer, so that the pores of the porous structure on the surface of the ceramic membrane layer are filled with the organic resin, and curing;

(3) and polishing the surface of the ceramic membrane layer to remove the organic resin in the area outside the porous structure.

2. The method of claim 1, wherein the conditions of the micro-arc oxidation comprise: the current density is 0.2-10A/dm³The temperature is 20-60 deg.C, and the time is 30-120 min.

3. The method of claim 2, wherein the electrolyte in the electrolyte is at least one of a carbonate, a phosphate, and a silicate;

preferably, the electrolyte is used in an amount such that the pH of the electrolyte is 8 to 13.

4. The method of any of claims 1-3, wherein the substrate is at least one of aluminum, an aluminum alloy, titanium, a titanium alloy, magnesium, a magnesium alloy, zirconium, and a zirconium alloy.

5. The method of any one of claims 1-3, wherein the organic resin is at least one of PEEK, PTFE, and PFA.

6. The method of claim 1, wherein after polishing, the pore openings of the ceramic membrane layer are flush with the organic resin in the pores.

7. Wear resistant non-stick coating obtainable by the method according to any of claims 1 to 6.

8. A pot characterized by comprising a base (1) and a wear-resistant non-stick coating formed on the base (1), the wear-resistant non-stick coating comprising a ceramic film layer (2) having a porous structure on the surface thereof and an organic resin (4) filled in pores (3) of the porous structure, the pores (3) having an opening size smaller than the inner size of the pores (3);

preferably, said wear resistant non-stick coating is the wear resistant non-stick coating of claim 7.

9. The cookware according to claim 8, wherein the thickness of the ceramic membrane layer (2) is 10-50 microns;

further preferably, the maximum pore size of the pores (3) is 5-15 microns;

preferably, the shape of the holes (3) is drop-shaped, tapered in longitudinal section or trapezoidal in longitudinal section.

10. The cookware according to claim 8 or 9, wherein said base (1) is at least one of aluminium, aluminium alloy, titanium alloy, magnesium alloy, zirconium and zirconium alloy;

preferably, the organic resin (4) is at least one of PEEK, PTFE, and PFA.

11. A cooking appliance, characterized in that it comprises a pot according to any of claims 8-10;

preferably, the cooking device is a wok, a frying pan, an air fryer, a frying and baking machine, a bread maker, an electric cooker, an electric pressure cooker or a soybean milk maker.

Technical Field

The invention relates to the technical field of electric heating appliances, in particular to a wear-resistant non-stick coating, a preparation method thereof, a pot and cooking equipment.

Background

At present, in order to achieve non-stickiness during cooking, domestic and foreign cookers and inner pots are all provided with non-stick coatings on the inner sides of the inner pots. The most commonly used are organic fluororesin coatings and ceramic coatings. However, the coatings have some defects, such as lower hardness of the organic fluorine resin coating, poorer wear resistance, no resistance to shovel and scratch, and easy occurrence of coating falling-off phenomenon; the ceramic non-stick coating has poor weather resistance, the non-stick property is reduced after long-term use, and the oily ceramic coating pollutes the environment during construction. Therefore, the market urgently needs an inner pot coating with non-stick property and wear resistance.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a wear-resistant non-stick coating, a preparation method thereof, a cooker and cooking equipment.

In order to achieve the above object, one aspect of the present invention provides a method for preparing a wear-resistant non-stick coating, wherein the method comprises:

(1) generating a ceramic film layer with a porous structure on the surface in situ on the surface of the substrate through micro-arc oxidation, wherein the opening size of the pores of the porous structure is smaller than the internal size of the pores;

(2) coating organic resin on the surface of the ceramic membrane layer, so that the pores of the porous structure on the surface of the ceramic membrane layer are filled with the organic resin, and curing;

(3) and polishing the surface of the ceramic membrane layer to remove the organic resin in the area outside the porous structure.

In a second aspect, the invention provides a wear-resistant non-stick coating obtained by the above-mentioned preparation method.

The invention provides a cooker, wherein the cooker comprises a base body and a wear-resistant non-stick coating formed on the base body, the wear-resistant non-stick coating comprises a ceramic film layer which is generated on the base body in situ and has a porous structure on the surface, and organic resin filled in pores of the porous structure, and the opening size of the pores is smaller than the internal size of the pores.

A fourth aspect of the invention provides a cooking apparatus, wherein the cooking apparatus comprises the pan of the invention.

The wear-resistant non-stick coating comprises a ceramic film layer with a porous structure on the surface and organic resin filled in holes of the porous structure, wherein the opening size of the holes is smaller than the internal size (namely, the upper part is narrow and the lower part is wide), the organic resin is easy to enter the holes but is difficult to separate, and the bonding force with the ceramic film layer is large after the organic resin is cured, so that the coating has the non-stick property of the organic resin and the wear resistance of the ceramic; and the ceramic film layer is generated in situ on the surface of the substrate, so that the pollution to the environment caused by spraying oily ceramic paint in the prior art is avoided.

Drawings

Fig. 1 is a schematic structural view of the pot of the present invention.

Description of the reference numerals

1 base body 2 ceramic film layer

3 pore 4 organic resin

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

The invention provides a preparation method of a wear-resistant non-stick coating, which comprises the following steps:

(1) generating a ceramic film layer with a porous structure on the surface in situ on the surface of the substrate through micro-arc oxidation, wherein the opening size of the pores of the porous structure is smaller than the internal size of the pores;

(2) coating organic resin on the surface of the ceramic membrane layer, so that the pores of the porous structure on the surface of the ceramic membrane layer are filled with the organic resin, and curing;

(3) and polishing the surface of the ceramic membrane layer to remove the organic resin in the area outside the porous structure.

In the present invention, "the opening size of the pores of the porous structure is smaller than the internal size of the pores" means that most of the pores in the porous structure have the characteristic of being narrow at the top and wide at the bottom, that is, the opening size of the pores is smaller than the internal size, and not all the pores have the characteristic of being narrow at the top and wide at the bottom, and the present invention allows a small number of pores having opening sizes larger than or equal to the internal size to exist in the porous structure of the ceramic membrane layer.

In the invention, the substrate is used as an anode, an insoluble metal material (such as stainless steel) is used as a cathode, and micro-arc oxidation is carried out under the micro-arc oxidation condition, so that a ceramic film layer with a porous structure on the surface can be generated on the surface of the substrate in situ, and the opening size of each hole of the porous structure is smaller than the internal size of the hole.

In the invention, the shape of the hole on the surface of the ceramic film layer formed by micro-arc oxidation can be a water drop type, a conical longitudinal section or a trapezoid longitudinal section.

In the present invention, the shape and size of the holes and the thickness of the ceramic film layer can be controlled by adjusting the micro-arc oxidation conditions, preferably, the micro-arc oxidation conditions include: the current density is 0.2-10A/dm³The temperature is 20-60 deg.C, and the time is 30-120 min.

In the invention, the electrolyte of the micro-arc oxidation process is preferably weakly alkaline, and preferably, the electrolyte in the electrolyte is at least one of carbonate, phosphate and silicate; further preferably, the electrolyte is used in an amount such that the pH of the electrolyte is 8 to 13.

In the invention, the substrate may be a substrate material which can generate a ceramic film layer with a porous structure on the surface in situ through micro-arc oxidation, and the opening size of each hole of the porous structure is smaller than the internal size of the hole, and preferably, the substrate is at least one of aluminum, aluminum alloy, titanium alloy, magnesium alloy, zirconium and zirconium alloy.

In the present invention, the organic resin may be an organic resin having non-tackiness as used as a coating material, which is currently available in the art, and preferably, the organic resin is at least one of PEEK, PTFE, and PFA.

In the present invention, in the step (2), the curing temperature is not particularly limited as long as the organic resin in the pores can be cured, and the curing is usually a high-temperature curing, for example, the curing temperature may be 370 to 420 ℃.

In the present invention, in step (3), the polishing may be carried out by a surface polishing method which is conventional in the art as long as the organic resin other than the porous structure can be removed without destroying the organic resin in the pores, and for example, the polishing may be mechanical polishing. Preferably, after polishing, the pore openings of the ceramic membrane layer are flush with the organic resin in the pores.

In a second aspect, the invention provides a wear-resistant non-stick coating obtained by the preparation method. The wear-resistant non-stick coating comprises a ceramic film layer with a porous structure on the surface and organic resin filled in holes of the porous structure, wherein the opening size of the holes is smaller than the internal size of the holes, the organic resin is easy to enter the holes but not easy to separate, and the bonding force with the ceramic film layer is large after the organic resin is cured, so that the coating has the non-stick property of the organic resin and the wear resistance of the ceramic.

In a third aspect, the invention provides a cookware, as shown in fig. 1, the cookware comprises a base 1 and a wear-resistant non-stick coating formed on the base 1, wherein the wear-resistant non-stick coating comprises a ceramic film layer 2 which is generated in situ on the base 1 and has a porous structure on the surface, and an organic resin 4 filled in pores 3 of the porous structure, and the opening size of the pores 3 is smaller than the internal size of the pores.

Preferably, the wear-resistant non-stick coating is the wear-resistant non-stick coating of the present invention.

In the present invention, the substrate 1 may be a substrate material capable of in-situ forming a ceramic membrane layer having a porous structure on a surface thereof, and an opening size of each pore of the porous structure is smaller than an inner size of the pore, and preferably, the substrate 1 is at least one of aluminum, an aluminum alloy, titanium, a titanium alloy, magnesium, a magnesium alloy, zirconium, and a zirconium alloy.

In the present invention, the thickness of the substrate 1 may be selected conventionally in the art, for example, the thickness of the substrate 1 is 0.5 to 5 mm.

In the present invention, the organic resin 4 may be an organic resin having non-tackiness as a coating material existing in the art, and preferably, the organic resin 4 is at least one of PEEK, PTFE, and PFA.

In the invention, in order to further improve the wear resistance and non-stick property of the wear-resistant non-stick coating, the thickness of the ceramic film layer 2 is preferably 10-50 micrometers.

In the present invention, the opening size of the hole 3 is smaller than the inner size of the hole, and the shape of the hole 3 may be a water drop shape, a tapered shape in longitudinal section, or a trapezoidal shape in longitudinal section.

In order to increase the bonding force between the organic resin in the pores and the ceramic film layer and improve the wear resistance and non-stick property of the coating, the maximum pore diameter of the pores 3 is preferably 5 to 15 micrometers.

A fourth aspect of the invention provides a cooking apparatus, wherein the cooking apparatus comprises the pan of the invention.

In the invention, preferably, the cooking device is a wok, a frying pan, an air fryer, a frying and baking machine, a bread machine, an electric cooker, an electric pressure cooker or a soybean milk machine.

The present invention will be described in detail below by way of examples.