CN113953166A - Easy-to-clean coating on metal surface and processing method of easy-to-clean coating - Google Patents
Easy-to-clean coating on metal surface and processing method of easy-to-clean coating Download PDFInfo
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- CN113953166A CN113953166A CN202111333213.2A CN202111333213A CN113953166A CN 113953166 A CN113953166 A CN 113953166A CN 202111333213 A CN202111333213 A CN 202111333213A CN 113953166 A CN113953166 A CN 113953166A
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- 239000002184 metal Substances 0.000 title claims abstract description 73
- 239000006119 easy-to-clean coating Substances 0.000 title claims abstract description 32
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 161
- 239000011248 coating agent Substances 0.000 claims abstract description 150
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000010702 perfluoropolyether Substances 0.000 claims abstract description 65
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 50
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 20
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 17
- -1 silicon ions Chemical class 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 12
- 230000004913 activation Effects 0.000 claims description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 6
- 239000002352 surface water Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 239000011737 fluorine Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000003670 easy-to-clean Effects 0.000 abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 9
- 239000010935 stainless steel Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 description 10
- 230000002209 hydrophobic effect Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003678 scratch resistant effect Effects 0.000 description 2
- 239000004447 silicone coating Substances 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
- B05D3/141—Plasma treatment
- B05D3/145—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2506/00—Halogenated polymers
- B05D2506/10—Fluorinated polymers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a coating easy to clean on a metal surface and a processing method thereof, relating to the technical field of coatings, wherein the coating easy to clean on the metal surface is formed on the surface of a metal substrate and comprises a silicon dioxide glassy coating and a perfluoropolyether coating; the silicon dioxide glassy coating is arranged on the surface of the metal substrate; the perfluoropolyether coating is grafted to the surface of the silica glassy coating. Through the easy-to-clean coating on the metal surface, the technical problems of poor easy-to-clean effect and short service life of the coating on the stainless steel surface in the prior art are solved, and the use requirements of users on kitchen appliances are met.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an easy-to-clean coating on a metal surface and a processing method of the easy-to-clean coating.
Background
At present, many parts of kitchen appliances are made of metal base materials such as stainless steel, the stainless steel is easy to process and high in strength and shows good metal texture, but after long-time use, the surface of the stainless steel can be gradually oxidized and corroded, oil stains are easy to adhere to the surface of the stainless steel, and the surface of the stainless steel is difficult to clean. In contrast, in the prior art, a coating is generally arranged on the surface of the stainless steel, but most of the coating is a silicone coating or a ceramic coating, so that the cleaning effect is not obvious, and the service life is short.
Disclosure of Invention
The invention aims to provide an easy-to-clean coating on a metal surface and a processing method of the easy-to-clean coating, so as to solve the technical problems of poor easy-to-clean effect and short service life of a coating on a stainless steel surface in the related art.
In order to solve the technical problems, the technical means adopted by the invention are as follows:
in a first aspect, the present invention provides an easy-to-clean coating for metal surface, formed on a metal substrate surface, comprising: a silica glassy coating and a perfluoropolyether coating;
the silicon dioxide glassy coating is arranged on the surface of the metal substrate;
the perfluoropolyether coating is grafted to the silica glassy coating surface.
In a second aspect, an easy-clean coating process is used to prepare the easy-clean coating on the metal surface, and comprises the following steps:
treating a base material: removing oil stains and protective film residual glue on the surface of the metal base material, and standing or drying after cleaning;
spraying: coating a silica sol coating on the surface of the metal substrate, and then drying to form a silicon dioxide glassy coating;
grafting: and activating the surface of the silicon dioxide glassy coating formed in the spraying step, spraying a perfluoropolyether coating, and then baking or standing to form the perfluoropolyether coating on the surface of the silicon dioxide glassy coating.
Further, in the spraying step, the silica sol coating is sprayed by adopting an electrostatic rotary cup spraying method, and the requirement of the environmental temperature is 15-30 ℃ and the requirement of the environmental humidity is 50% -70% during spraying.
Further, the thickness of the silica glassy coating formed after the spraying step is controlled to be in the range of 3 to 8 μm.
Further, the silica sol coating comprises silica sol, organic silicon additives and water;
the silica sol accounts for 35% -45%, the organic silicon additive accounts for 1% -3%, and the water accounts for 52% -64%.
Further, in the spraying step, the drying temperature range is controlled to be 180-.
Further, in the grafting step, bombardment activation treatment is carried out on the surface of the silicon dioxide glassy coating by adopting plasma so as to excite hydroxyl groups on the surface of the silicon dioxide glassy coating;
the perfluoropolyether coating contains perfluoropolyether chains, silicon ions and fluorine ions;
the hydroxyl groups are bonded to the silicon ions of the silica glassy coating and the silicon ions of the perfluoropolyether coating, respectively;
one end of the perfluoropolyether chain is connected with the fluorine ions, and the other end of the perfluoropolyether chain is connected with the silicon ions of the perfluoropolyether coating.
Further, when bombardment activation treatment is carried out, the bombardment power is 4kw, and the bombardment height range is 3-5 mm;
the surface of the silicon dioxide glassy coating is activated, and the surface water contact angle is less than 5 degrees.
Further, the perfluoropolyether coating includes a perfluoropolyether siloxane solution, a nonafluoro-1-ethoxy-butane solution, and a hydrofluoroether solution;
the perfluoropolyether siloxane solution, the nonafluoro-1-ethoxy-butane solution, and the hydrofluoroether solution form a mixed solution.
Further, in the grafting step, when the perfluoropolyether coating is sprayed, the requirement on the environmental temperature is 15-30 ℃, the requirement on the environmental humidity is 50-70 percent, and the requirement on the spraying amount is 40-60 g/square meter;
the baking temperature range is controlled at 150 ℃ and 180 ℃, and the drying time is 15-20 minutes.
Compared with the prior art, the easy-to-clean metal surface coating provided by the invention has the beneficial effects that:
in the application, the metal surface easy-cleaning coating is formed on the surface of the metal substrate and comprises a silicon dioxide glassy coating and a perfluoropolyether coating, namely the surface of the metal substrate is provided with two coatings, the silicon dioxide glassy coating is formed on the bottom layer, and the perfluoropolyether coating is formed on the surface layer. The vitreous silica coating on the bottom layer has a hard, scratch-resistant, wear-resistant and compact surface, so that the metal base material can be protected and prevented from being oxidized and corroded; the perfluoropolyether coating on top layer has low surface energy and excellent oleophobic hydrophobic property, and this low surface energy makes the perfluoropolyether coating have certain compliance, is difficult to ground off when hard thing rubs, and long service life, oleophobic hydrophobic property make the difficult adhesion greasy dirt of perfluoropolyether coating, easy cleanness.
Compared with the prior art, the coating easy to clean on the metal surface can protect a metal substrate such as stainless steel from being gradually oxidized and corroded, the surface layer of the coating is oleophobic and hydrophobic, oil stains are not easy to adhere to the surface layer of the coating, the coating is easy to clean, the coating is not easy to fall off, the metal substrate can be protected for a long time, and the application life is long.
In a second aspect, the processing method of the easy-to-clean coating provided by the invention has the beneficial effects that:
the easy-to-clean coating on the metal surface can be prepared by the processing method of the easy-to-clean coating provided by the invention, so that the technical advantages and effects of the easy-to-clean coating on the metal surface are achieved, and the details are not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an easy-to-clean coating for a metal surface according to an embodiment of the present invention;
fig. 2 is a schematic view of a state of a silicon dioxide glassy coating disposed on a metal surface after activation according to an embodiment of the present invention.
Icon:
100-silica glassy coating;
200-perfluoropolyether coating;
300-a metal substrate;
400-hydroxy group.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The easy-to-clean metal surface coating provided by the embodiment of the invention is formed on the surface of a metal substrate 300, and specifically as shown in fig. 1, the easy-to-clean metal surface coating comprises a silica glassy coating 100 and a perfluoropolyether coating 200; the silica glassy coating 100 is disposed on the surface of the metal substrate 300; the perfluoropolyether coating 200 is grafted to the surface of the silica glassy coating 100.
Referring to fig. 1, in the present embodiment, a metal surface easy-to-clean coating is formed on the surface of a metal substrate 300, and the easy-to-clean coating includes a silica glassy coating 100 and a perfluoropolyether coating 200, that is, two coatings are formed on the surface of the metal substrate 300, the bottom coating is the silica glassy coating 100, and the top coating is the perfluoropolyether coating 200. Wherein, the surface of the silicon dioxide glassy coating 100 at the bottom layer is hard, scratch-resistant, wear-resistant and compact, thereby protecting the metal substrate 300 and preventing the metal substrate 300 from being oxidized and corroded; perfluoropolyether coating 200 on top layer has low surface energy and the hydrophobic characteristic of oleophobic of excellence, and this low surface energy makes perfluoropolyether coating 200 have certain compliance, is difficult to ground off when hard thing rubs, and long service life, the hydrophobic characteristic of oleophobic makes perfluoropolyether coating 200 difficult adhesion greasy dirt, easy cleanness.
It can be seen that, compared with the prior art, the easy clean coating in metal surface that this embodiment provided can protect metal substrate 300, avoids it to be oxidized gradually, corrodes, and the surface layer of this coating is oleophobic hydrophobic moreover, is difficult for the adhesion greasy dirt, and is easy clean, and moreover, this coating is difficult for droing, can protect metal substrate 300 for a long time, uses longe-lived.
The processing method of the easy-to-clean coating provided by the embodiment is used for preparing the easy-to-clean coating on the metal surface, and comprises the following steps:
treating a base material: removing oil stains and protective film residual glue on the surface of the metal base material 300, and standing or drying after cleaning; spraying: coating a silica sol coating on the surface of the metal substrate 300, and then drying to form a silica glassy coating 100; grafting: the surface of the silica glassy coating 100 formed in the spraying step is subjected to an activation treatment, and then a perfluoropolyether coating is sprayed, followed by baking or standing, so that the perfluoropolyether coating 200 is formed on the surface of the silica glassy coating 100.
Specifically, in the substrate processing step, the foreign matter on the surface of the metal substrate 300 is removed, so that the metal substrate 300 can be better bonded with the vitreous silica coating 100 formed in the spraying step, the coating is not easy to fall off, and the metal substrate 300 can be protected for a long time; in the grafting step, referring to fig. 2, the surface of the vitreous silica coating 100 is bombarded and activated by plasma, so that hydroxyl groups 400 can be excited on the surface of the vitreous silica coating 100, after the perfluoropolyether coating is sprayed, the hydroxyl groups 400 are respectively bonded with silicon ions of the vitreous silica coating 100 and silicon ions of the perfluoropolyether coating to form a Si-O pattern, and the vitreous silica coating 100 and the perfluoropolyether coating 200 form a copolymer, so that the purpose of forming the perfluoropolyether coating 200 on the surface of the vitreous silica coating 100 is achieved, the perfluoropolyether coating 200 is well-defined, but is integrated, the perfluoropolyether coating 200 is not easily peeled off from the vitreous silica coating 100, and the service life is long.
In addition, in the perfluoropolyether coating, one end of a perfluoropolyether chain is connected with silicon ions of the perfluoropolyether chain, and the other end of the perfluoropolyether chain is connected with fluorine ions of the perfluoropolyether chain, so that the surface of the perfluoropolyether coating 200 is oleophobic and hydrophobic and has easy cleanability.
Further, in the spraying step, the electrostatic rotary cup spraying method is adopted to spray the silica sol coating, and the requirement of the environmental temperature is 15-30 ℃ and the requirement of the environmental humidity is 50% -70% during spraying.
Specifically, the silica sol coating comprises 35-45% of silica sol, 1-3% of organic silicon additive and 52-64% of water; coating the silica sol coating on the surface of the metal base material 300 by an electrostatic rotary cup spraying method, wherein the requirement of the environmental temperature is 15-30 ℃, the requirement of the environmental humidity is 50% -70%, and the requirement of the spraying thickness is 3-8 μm; after the spraying, the metal substrate 300 is placed in an environment of 180-200 ℃ for 30 minutes, so that the silica sol coating is hydrolyzed and cured to form the silica glassy coating 100 on the surface of the metal substrate 300.
It should be noted that the thickness of the silica glassy coating 100 is controlled to be in the range of 3-8 μm, which ensures that the silica glassy coating 100 adheres well to the metal substrate 300 and is not prone to wrinkling.
Further, in the grafting step, when bombardment activation treatment is carried out on the surface of the silicon dioxide glassy coating 100 by adopting plasma, the bombardment power is 4kw, and the bombardment height range is 3-5 mm; the surface of the silica glassy coating 100 has a surface water contact angle of less than 5 deg. after surface activation.
Through the above treatment, hydroxyl groups 400 are excited on the surface of the silica glassy coating 100, the hydroxyl groups 400 enable the perfluoropolyether coating 200 to be grafted on the surface of the silica glassy coating 100, and the surface water contact angle is smaller than 5 degrees, namely the surface of the silica glassy coating 100 is hydrophilic and has good wettability, so that the preparation is made for spraying the perfluoropolyether coating.
Further, the perfluoropolyether coating includes a perfluoropolyether siloxane solution, a nonafluoro-1-ethoxy-butane solution, and a hydrofluoroether solution; the perfluoropolyether siloxane solution, the nonafluoro-1-ethoxy-butane solution, and the hydrofluoroether solution form a mixed solution.
Specifically, when the perfluoropolyether coating is a mixed solution and is sprayed on a silica glassy coating 100 the surface of which is excited to have hydroxyl groups of 400 and the surface water contact angle of which is less than 5 degrees, the environmental temperature is required to be 15-30 ℃, the environmental humidity is required to be 50-70 percent, and the spraying amount is required to be 40-60 g/square meter; after the spraying, the metal substrate 300 is placed in an oven, the temperature in the oven is controlled between 150 and 180 ℃, and the baking is carried out for 15 to 20 minutes. After the baking is finished, the metal base material 300 is taken out, two coatings are formed on the surface of the metal base material, the bottom layer is the silicon dioxide glassy coating 100, the surface layer is the perfluoropolyether coating 200, the two coatings play a role in protecting the metal base material 300, the metal base material 300 is prevented from being oxidized and corroded, oil stains are prevented from being directly adhered to the metal base material 300, and the metal base material is easy to clean.
The processing method of the easy-to-clean coating provided by the embodiment of the invention comprises the following steps:
treating the base material, namely removing oil stains and residual glue of the protective film on the surface of the metal base material 300 in the step, and standing or drying after cleaning; spraying, wherein in the step, a silica sol coating is sprayed on the surface of the metal base material 300 by adopting an electrostatic rotary cup spraying method, the environment temperature is required to be 15-30 ℃, the environment humidity is required to be 50-70%, the coating thickness is controlled to be 3-8 μm, after the spraying is finished, the metal base material 300 is placed in an oven at the temperature of 180-200 ℃ for baking for 30 minutes, and after the preset time is reached, the metal base material 300 is taken out, and at the moment, the surface of the metal base material 300 forms the silica glass state coating 100; grafting, in the step, firstly, carrying out bombardment activation treatment on the surface of the silicon dioxide glassy coating 100 by adopting plasma, wherein the bombardment power is 4kw, the bombardment height range is 3-5mm, the surface water contact angle of the activated silicon dioxide glassy coating 100 is less than 5 degrees, then spraying perfluoropolyether coating to the surface of the silicon dioxide glassy coating 100, the spraying environment temperature is required to be 15-30 ℃, the environment humidity is required to be 50% -70%, the spraying amount is required to be 40-60 g/square meter, after the spraying is finished, placing the metal base material 300 in an oven at 180 ℃ of 150-.
The easy-to-clean coating on the metal surface can be prepared by the processing method of the easy-to-clean coating, and the comparison results of the effect of the coating and the prior art are shown in the following table:
| type (B) | Common metal | Silicone coating | Coating easy to clean in scheme |
| Surface free energy | 30-35mN/m | 20-25mN/m | 8-10mN/m |
| Water contact angle | 50-60° | 90-100° | 115-120° |
| Easy cleaning property | In general | Easy to clean | Is easy to clean |
| Easy cleaning life | Is free of | 1 year | For 3 years |
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein, and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (10)
1. An easy-to-clean coating for a metal surface, formed on a surface of a metal substrate, comprising: a silica glassy coating and a perfluoropolyether coating;
the silicon dioxide glassy coating is arranged on the surface of the metal substrate;
the perfluoropolyether coating is grafted to the silica glassy coating surface.
2. A method of processing an easy-to-clean coating for a metal surface according to claim 1, comprising the steps of:
treating a base material: removing oil stains and protective film residual glue on the surface of the metal base material, and standing or drying after cleaning;
spraying: coating a silica sol coating on the surface of the metal substrate, and then drying to form a silicon dioxide glassy coating;
grafting: and activating the surface of the silicon dioxide glassy coating formed in the spraying step, spraying a perfluoropolyether coating, and then baking or standing to form the perfluoropolyether coating on the surface of the silicon dioxide glassy coating.
3. The process for producing an easy-to-clean coating according to claim 2, wherein the silica sol coating is sprayed by an electrostatic rotary cup spraying method in the spraying step, and the ambient temperature is required to be 15 to 30 ℃ and the ambient humidity is required to be 50 to 70%.
4. The easy-to-clean coating process of claim 2, wherein the thickness of the silica glassy coating formed after the spraying step is controlled to be in the range of 3 to 8 μm.
5. The easy-to-clean coating process of claim 2, wherein the silica sol coating comprises a silica sol, a silicone-based additive, and water;
the silica sol accounts for 35% -45%, the organic silicon additive accounts for 1% -3%, and the water accounts for 52% -64%.
6. The easy-to-clean coating process of claim 2, wherein the drying temperature is controlled within the range of 180 ℃ to 200 ℃ and the drying time is 30 minutes in the spraying step.
7. The easy-to-clean coating processing method according to claim 2, characterized in that, in the grafting step, the bombardment activation treatment is carried out on the surface of the silica glassy coating by using plasma to excite hydroxyl groups on the surface of the silica glassy coating;
the perfluoropolyether coating contains perfluoropolyether chains, silicon ions and fluorine ions;
the hydroxyl groups are bonded to the silicon ions of the silica glassy coating and the silicon ions of the perfluoropolyether coating, respectively;
one end of the perfluoropolyether chain is connected with the fluorine ions, and the other end of the perfluoropolyether chain is connected with the silicon ions of the perfluoropolyether coating.
8. The easy-to-clean coating processing method according to claim 7, characterized in that, when the bombardment activation treatment is carried out, the bombardment power is 4kw, and the bombardment height is in the range of 3-5 mm;
the surface of the silicon dioxide glassy coating is activated, and the surface water contact angle is less than 5 degrees.
9. The easy-to-clean coating process of claim 2, wherein said perfluoropolyether coating comprises a perfluoropolyether siloxane solution, a nonafluoro-1-ethoxy-butane solution, and a hydrofluoroether solution;
the perfluoropolyether siloxane solution, the nonafluoro-1-ethoxy-butane solution, and the hydrofluoroether solution form a mixed solution.
10. The process for making an easy-to-clean coating according to claim 2, wherein in the grafting step, when spraying said perfluoropolyether coating, the ambient temperature is required to be from 15 to 30 ℃, the ambient humidity is required to be from 50% to 70%, and the spraying amount is required to be from 40 to 60g per square meter;
the baking temperature range is controlled at 150 ℃ and 180 ℃, and the drying time is 15-20 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333213.2A CN113953166A (en) | 2021-11-11 | 2021-11-11 | Easy-to-clean coating on metal surface and processing method of easy-to-clean coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115232490A (en) * | 2022-08-08 | 2022-10-25 | 杭州老板电器股份有限公司 | Hydrophobic and oleophobic coating material for range hood and preparation method and application thereof |
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| CN115232490A (en) * | 2022-08-08 | 2022-10-25 | 杭州老板电器股份有限公司 | Hydrophobic and oleophobic coating material for range hood and preparation method and application thereof |
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Application publication date: 20220121 |