Cooker panel and preparation method and application thereof

Abstract

The present invention relates to a stove panel, comprising a first metal plate, characterized in that the first metal plate is a microporous plate, the upper surface of the first metal plate is coated with an oleophobic layer, and the lower surface is coated with an oleophilic layer, and the oil droplets dripped onto the upper surface can only penetrate from the oleophobic layer to the oleophilic layer through the micropores of the first metal plate; it also relates to a preparation method using the stove panel and a stove countertop using the stove panel. The present invention can prevent oil droplets from accumulating on the upper surface of the stove panel, and realize self-cleaning of the surface of the stove panel. In the stove countertop using the stove panel, the oil collection layer is below the oil guide layer, and the oil guide layer is the above-mentioned stove panel, so that the oil droplets dripped onto the surface of the oil guide layer are collected to the oil collection layer through the unidirectional oil guide of the oil guide layer, thereby realizing self-cleaning of the surface of the stove countertop.

Description

Technical Field

[0001] The present invention relates to the field of stoves, and in particular to a stove panel and a preparation method and application thereof. Background Art

[0002] During daily use, dirt will accumulate on the stove top, which needs to be cleaned manually by the user. The stove panels currently used are generally stainless steel or aluminum alloy panels. Such panels are relatively easy to clean with water vapor, but are not effective in dealing with oil droplets. When dust falls on oil droplets that are not cleaned in time, dirt will form on the stove top, which is difficult to clean after long-term accumulation.

[0003] Modifying the panel itself that constitutes the stove top is one of the effective ways to solve the above problems. Typical oil removal and adsorption materials are mostly super hydrophobic / super oleophilic materials. Such materials have the effect of promoting oil-water separation when acting on the surface of porous materials. However, with the long-term use of super hydrophobic / super oleophilic materials, the adsorbed oil droplets will be stored inside the porous material. Affected by the external environment, the spoiled cooking oil will produce oil rancidity, accompanied by an unpleasant and irritating rancid smell, and long-term storage will be harmful to human health. Moreover, when the porous material is saturated with adsorption, the oil removal effect on the surface of the material is reduced; in addition, the super hydrophilic / super oleophobic surface material will still retain many oil droplets on the stainless steel panel, which need to be handled in time, and there is no transfer and storage function. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a stove panel that is convenient for cleaning grease stains in view of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned stove panel in view of the prior art.

[0006] The third technical problem to be solved by the present invention is to provide a stove table that is convenient for cleaning grease stains in view of the prior art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a stove panel, comprising a first metal plate, characterized in that the first metal plate is a microporous plate, the upper surface of the first metal plate is coated with an oleophobic layer, and the lower surface is coated with an oleophilic layer, and the oil droplets dripping onto the upper surface can only penetrate from the oleophobic layer through the micropores on the first metal plate to the oleophilic layer.

[0008] Preferably, the contact angle of the oleophobic layer is 90° to 150°, and the contact angle of the oleophilic layer is 30° to 90°. By setting the contact angles of the oleophobic layer and the oleophilic layer, the oil droplets dripped onto the upper surface of the first metal plate can penetrate the first metal plate in droplets under the action of gravity and oleophilic capillary force, thereby better realizing the unidirectional oil conduction from the oleophobic surface to the oleophilic surface of the first metal plate.

[0009] Preferably, the pore density of the first metal plate is 250-270 ppi, the pore diameter is 50-100 μm, and the thickness is 2-3 mm. By designing the pore density, pore diameter and thickness of the first metal plate, the oil droplets can better penetrate from the oleophobic layer to the oleophilic layer under the unidirectional oil conduction effect.

[0010] Preferably, the thickness of the oleophobic layer is 1 / 10 to 1 / 5 of the total thickness of the cooker panel. If the thickness of the oleophobic layer is too small, bidirectional penetration will occur; if the thickness of the oleophobic layer is too large, the oil droplets will stay in the oleophobic layer, the capillary driving force generated by the oleophilic layer cannot meet the requirements, and the oil droplets cannot penetrate the first metal plate.

[0011] The technical solution adopted by the present invention to solve the second technical problem is: a method for preparing the above-mentioned stove panel, characterized by comprising the following steps:

[0012] (1) Pretreatment: ultrasonically clean the first metal plate to remove stains, dry it, and set it aside;

[0013] (2) Preparation of oleophobic layer: prepare an oleophobic emulsion, quickly spray the oleophobic emulsion on the lower surface of the first metal plate, and dry it at 100°C to 200°C. The oleophobic emulsion is a mixture of PVDF, DMAC, KCl and a dispersant, wherein the mass content of the dispersant is 8% to 10%, and the mass ratio of the PVDF, DMAC and KCl is 15 to 20:80 to 85:1.

[0014] (3) Preparation of oleophilic layer: Prepare a oleophilic emulsion, spray the oleophilic emulsion on the upper surface of the first metal plate, and dry it at 60°C to 100°C. The oleophilic emulsion is a mixture of 10% to 15% PVDF and 80% to 85% DMAC.

[0015] The technical solution adopted by the present invention to solve the third technical problem is: a stove table top, which at least includes an oil conducting layer and an oil collecting layer arranged opposite to each other up and down, and the oil conducting layer is the above-mentioned stove panel.

[0016] The above-mentioned oil collection layer can be implemented in a variety of specific ways, among which a preferred implementation is: the oil collection layer includes a second metal plate and a super oleophobic layer coated on the upper surface of the second metal plate, so that oil droplets can be collected on the oil collection layer. Users can regularly remove the oil collection layer for cleaning, and because the second metal plate is coated with the super oleophobic layer, it is easy to clean.

[0017] Furthermore, preferably, the contact angle of the super oleophobic layer is greater than 130°, so that the super oleophobic layer can be better formed on the surface of the second metal plate, which is more conducive to collecting oil droplets and also makes it easier to clean the oil collection layer.

[0018] Furthermore, preferably, a gap of 1 mm to 2 mm is left between the oil conducting layer and the oil collecting layer, so that the oil droplets permeating the oil conducting layer can be better collected in the oil collecting layer, avoiding the oil droplets being squeezed between the oil conducting layer and the oil collecting layer to affect the collection.

[0019] Another preferred implementation is that the oil collecting layer is an oil absorbing body, such as an oil absorbing sponge, so that the oil absorbing body can be replaced regularly or cleaned and reused.

[0020] Preferably, the stove tabletop of the present invention further comprises a base layer, which is a third metal plate and is located at the bottom of the oil collecting layer, and is used to cover the upper surface of the stove and enable the stove burner and control switch to be exposed, and the oil conducting layer and the oil collecting layer are respectively provided with a burner hole and a control switch hole for exposing the burner and the control switch.

[0021] Compared with the prior art, the advantages of the present invention are: the upper surface of the first metal plate is coated with an oleophobic layer, and the lower surface is coated with an oleophilic layer. The oil droplets dripped onto the upper surface can only penetrate from the oleophobic layer to the oleophilic layer through the micropores on the first metal plate, that is, the stove panel in the invention can achieve unidirectional oil conduction from the upper surface to the lower surface. The oil droplets dripped onto the upper surface of the first metal plate penetrate through the first metal plate in the form of droplets under the action of gravity and oleophilic capillary force, thereby avoiding the accumulation of oil droplets on the upper surface of the stove panel and achieving self-cleaning of the surface of the stove panel.

[0022] In the preparation method of the stove panel, an oleophobic layer and an oleophilic layer are formed on the upper and lower surfaces of the first metal plate respectively by selecting an oleophilic emulsion and an oleophobic emulsion and controlling the process conditions, thereby obtaining the desired stove panel. In the stove countertop to which the stove panel is applied, an oil collecting layer is provided below the oil conducting layer, and the oil conducting layer is the stove panel, so that the oil droplets dripping onto the surface of the oil conducting layer are collected into the oil collecting layer through the unidirectional oil conducting of the oil conducting layer, thereby realizing self-cleaning of the surface of the stove countertop. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a cooker panel in Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the stove table in Example 3 of the present invention;

[0025] Figure 3 This is a structural exploded view of the stove top in Example 3 of the present invention;

[0026] Figure 4 This is a cross-sectional view of the oil collecting layer in Example 3 of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1:

[0029] like Figure 1 As shown, a cooker panel 1 comprises a first metal plate 10, which is a microporous plate, and the upper surface of which is coated with an oleophobic layer 11, and the lower surface is coated with an oleophilic layer 12, and the oil droplets dropped on the upper surface can only penetrate from the oleophobic layer 11 to the oleophilic layer 12 through the first metal plate 10. The one-way penetration is related to the wetting properties, thickness, micropore density and pore size of the substrate (here, the first metal plate 10), therefore, in this embodiment, the first metal plate 10 is a stainless steel plate, and its pore density is 250-270ppi, pore size is 50-100μm, and thickness is 2-3mm.

[0030] Table 1 Contact angle classification

[0031] Category classification 0 1 2 3 4 5 Contact angle 0～30° 30°～60° 60°～90° 90°～120° 120°～150° ＞150°

[0032] Table 2 Different combinations of oleophobic layer and oleophilic layer

[0033]

[0034] From a microscopic perspective, the potential energy of the oil droplet gradually weakens during the penetration process from the oleophobic layer 11 to the oleophilic layer 12 (positive direction), which is a spontaneous process; the potential energy gradually increases during the penetration process from the oleophilic layer 12 to the oleophobic layer 11 (reverse direction), which is a non-spontaneous process. As described in Table 1 above, the contact angles of the oleophobic layer 11 and the oleophilic layer 12 are divided into six different levels, and combined to form six different schemes for testing. During the test, the oil droplets are dropped into the oleophobic layer 11 to observe the penetration of the oil droplets.

[0035] The test results show that in combination scheme ①, due to the lack of oleophilic capillary force, the oil droplets dripped onto the oleophobic layer 11 cannot penetrate into the oleophilic layer 12; in combination scheme ②, the oil droplets do not penetrate in both directions of the oleophobic layer 11 and the oleophilic layer 12; in combination scheme ⑤, it is oleophilic but will not penetrate in drops; in combination scheme ⑥, it is oleophilic. Only combination schemes ③ and ④ can obtain the unidirectional oil conduction effect from the oleophobic layer 11 to the oleophilic layer 12. Therefore, in this embodiment, the contact angle of the oleophobic layer 11 is designed to be 90° to 150°, and the contact angle of the oleophilic layer 12 is designed to be 30° to 90°. In this way, by designing the contact angles of the oleophobic layer 11 and the oleophilic layer 12, the oil droplets dripped onto the upper surface of the first metal plate 10 can penetrate the first metal plate 10 in drops under the action of gravity and oleophilic capillary force, thereby better realizing the unidirectional oil conduction from the oleophobic surface to the oleophilic surface of the first metal plate 10.

[0036] Furthermore, the thickness of the oleophobic layer 11 has an important influence on the unidirectional oil conduction effect. If the thickness of the oleophobic layer 11 is too small, bidirectional penetration will occur; if the thickness of the oleophobic layer 11 is too large, the oil droplets will stay in the oleophobic layer 11, and the capillary driving force generated by the oleophilic layer 12 cannot meet the requirements, and the oil droplets cannot penetrate the first metal plate 10. Therefore, in the present invention, the thickness of the oleophobic layer 11 is 1 / 10 to 1 / 5 (preferably 1 / 10) of the total thickness of the cooker panel 1.

[0037] Embodiment 2:

[0038] The cooker panel 1 of the present invention is prepared by the following method:

[0039] (1) Pretreatment: ultrasonically clean the first metal plate 10 to remove stains, dry it, and set it aside;

[0040] (2) Preparation of oleophobic layer: Prepare an oleophobic emulsion, quickly spray the oleophobic emulsion on the lower surface of the first metal plate 10, and dry it at 100°C to 200°C. The oleophobic emulsion is a mixture of PVDF, DMAC, KCl and a dispersant, wherein the mass content of the dispersant is 8% to 10% (preferably 8%, 9%, 10%), and the mass ratio of the PVDF, DMAC, and KCl is 15 to 20:80 to 85:1 (preferably 15:80:1, 20:80:1, 15:85:1, 20:85:1). The dispersant is selected as EL-1006 fluorine-containing nonionic surfactant (produced by Dongguan Yilian Chemical Technology Co., Ltd.).

[0041] (3) Preparation of oleophilic layer: prepare an oleophilic emulsion, spray the oleophilic emulsion on the upper surface of the first metal plate 10, and dry it at 60°C to 100°C. The oleophilic emulsion is a mixture of PVDF and DMAC, and the mass ratio of PVDF to DMAC is 10 to 15:80 to 85 (preferably 10:80, 10:85, 12:84, 15:80, 15:85).

[0042] Embodiment 3:

[0043] like Figures 2-3 As shown, a stove tabletop includes an oil-conducting layer 2 and an oil-collecting layer 3 arranged opposite to each other in the upper and lower parts, and a base layer 4 is arranged at the bottom of the oil-collecting layer 3. The oil-conducting layer 2 is selected from the stove panel 1, and the oil-collecting layer 3 includes a second metal plate 30 and a super oleophobic layer 31 coated on the upper surface of the second metal plate 30. The base layer 4 is a third metal plate. In this embodiment, the second metal plate 30 and the third metal plate are both stainless steel plates. The base layer 4 is coated on the upper surface of the stove and can expose the burner 6 and the control switch 7 of the stove, and the burner hole 8 and the control switch hole 9 for exposing the burner 6 and the control switch 7 are respectively opened on the oil-conducting layer 2 and the oil-collecting layer 3.

[0044] Since most stoves have double burners, in this embodiment, two oil-conducting layers 2 and two oil-collecting layers 3 are provided on the left and right, and a pot support 5 is provided on the top of each oil-conducting layer 2 .

[0045] Furthermore, the contact angle of the oleophobic layer 11 is greater than 130°, so that the super oleophobic layer 11 can be better formed on the surface of the second metal plate 30, which is more conducive to collecting oil droplets and also makes it easier to clean the oil collection layer 3. In addition, a gap of 1 mm to 2 mm is left between the oil-conducting layer 2 and the oil collection layer 3, so that the oil droplets that penetrate the oil-conducting layer 2 can be better collected to the oil collection layer 3, avoiding the oil droplets being squeezed between the oil-conducting layer 2 and the oil collection layer 3. Preferably, the second metal plate 30 is a concave structure, so that the oil droplets can be better collected.

[0046] It can be seen that the upper surface of the first metal plate 10 in the present invention is coated with an oleophobic layer 11, and the lower surface is coated with an oleophilic layer 12. The oil droplets dripped onto the upper surface can only penetrate from the oleophobic layer 11 to the oleophilic layer 12 through the micropores on the first metal plate 10, that is, the stove panel 1 in the present invention can achieve unidirectional oil conduction from the upper surface to the lower surface. The oil droplets dripped onto the upper surface of the first metal plate 10 penetrate the first metal plate 10 in droplets under the action of gravity and oleophilic capillary force, avoiding the accumulation of oil droplets on the upper surface of the stove panel 1, and achieving self-cleaning of the surface of the stove panel 1. In the stove countertop using the stove panel 1, the oil collection layer 3 is below the oil conduction layer 2, and the oil conduction layer 2 is the above-mentioned stove panel 1, so that the oil droplets dripped onto the surface of the oil conduction layer 2 are collected to the oil collection layer 3 through the unidirectional oil conduction of the oil conduction layer 2, thereby achieving self-cleaning of the surface of the stove countertop.

[0047] Embodiment 4:

[0048] Different from the third embodiment, in the present embodiment, the oil collecting layer 3 is an oil absorbing body, such as an oil absorbing sponge, so that the oil absorbing body can be replaced regularly or cleaned and reused.

Claims

1. A cooker panel, comprising a first metal plate (10), It is characterized in that The first metal plate (10) is a microporous plate, the upper surface of the first metal plate (10) is coated with an oleophobic layer (11), and the lower surface is coated with an oleophilic layer (12), and oil droplets dropped onto the upper surface can only penetrate from the oleophobic layer (11) through the micropores of the first metal plate (10) to the oleophilic layer (12); The contact angle of the oleophobic layer (11) is 90° to 150°, and the contact angle of the oleophilic layer (12) is 30° to 90°; The first metal plate (10) has a pore density of 250 to 270 ppi, a pore diameter of 50 to 100 μm, and a thickness of 2 to 3 mm; The thickness of the oleophobic layer (11) is 1 / 10 to 1 / 5 of the total thickness of the stove panel.

2. A method for preparing the cooker panel according to claim 1, Features The following steps are involved: (1) Pretreatment: ultrasonically clean the first metal plate (10) to remove stains, dry it, and set it aside; (2) Preparation of oleophobic layer: preparing an oleophobic emulsion, quickly spraying the oleophobic emulsion on the lower surface of the first metal plate (10), and drying at 100° C. to 200° C., wherein the oleophobic emulsion is a mixture of PVDF, DMAC, KCl and a dispersant, wherein the mass content of the dispersant is 8% to 10%, and the mass ratio of the PVDF, DMAC and KCl is 15 to 20:80 to 85:1; (3) Preparation of oleophilic layer: Prepare an oleophilic emulsion, spray the oleophilic emulsion on the upper surface of the first metal plate (10), and dry it at 60°C to 100°C. The oleophilic emulsion is a mixture of 10% to 15% PVDF and 80% to 85% DMAC.

3. A cooking table top using the panel as claimed in claim 1, It is characterized in that It at least comprises an oil-conducting layer (2) and an oil-collecting layer (3) which are arranged opposite to each other up and down, and the oil-conducting layer (2) is the stove panel (1).

4. The cooker tabletop according to claim 3, It is characterized in that The oil collection layer (3) comprises a second metal plate (30) and a super oleophobic layer (31) coated on the upper surface of the second metal plate (30).

5. The cooking tabletop according to claim 4, It is characterized in that The contact angle of the super oleophobic layer (31) is greater than 130°.

6. The cooking tabletop according to claim 4, It is characterized in that A gap of 1 mm to 2 mm is left between the oil-conducting layer (2) and the oil-collecting layer (3).

7. The cooking table according to claim 3, It is characterized in that The oil collecting layer (3) is an oil absorbing body.

8. The cooking tabletop according to any one of claims 3 to 7, It is characterized in that The invention also comprises a base layer (4), which is a third metal plate and is located at the bottom of the oil collecting layer (3), and is used to cover the upper surface of the stove and enable the stove burner (6) and the control switch (7) of the stove to be exposed, and the oil conducting layer (2) and the oil collecting layer (3) are respectively provided with a burner hole (8) and a control switch hole (9) for exposing the burner head (6) and the control switch (7).

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