CN115232490B - Hydrophobic and oleophobic coating material for range hood as well as preparation method and application thereof - Google Patents
Hydrophobic and oleophobic coating material for range hood as well as preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
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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
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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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
- 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
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
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Abstract
The utility model provides a hydrophobic and oleophobic coating material for a range hood, and a preparation method and application thereof, wherein the hydrophobic and oleophobic coating material comprises methyltriethoxysilane, phenyltrimethoxysilane, acidic silica sol, a silane coupling agent, ethanol and an antifouling additive, and can be coated on the surfaces of an oil cup, an oil net and the like of the range hood to form a compact coating.
Description
Technical Field
The utility model belongs to the technical field of coatings, and particularly relates to a hydrophobic and oleophobic coating material for a range hood, and a preparation method and application thereof.
Background
With the continuous improvement of the living standard of people, most kitchens are provided with smoke exhaust hoods, the kitchen can enable the air with the smoke to be exhausted out of the kitchen through the smoke exhaust pipelines, the odor of people choking in the kitchen can be reduced, and the smoke exhaust ventilator can exhaust the smoke to reduce the smoke inhaled by the human body, so that the kitchen is beneficial to the health of the human body.
In the long-term use process of the smoke exhaust ventilator, a large amount of grease can be stored in the inner cavity of the smoke exhaust ventilator, and the panel of the air inlet oil net is required to be frequently taken down for cleaning because the air inlet oil net is the place which is easiest to smoke and is also easiest to dirty. However, the vent holes arranged on the panel of the existing air inlet oil net are often formed by stamping, so that burrs are easily formed on the edge of the panel, and people are easily scratched. CN205664452U discloses a multi-functional oil net petticoat pipe, including discharge flue, collection mouth, purification layer, smoking unit, oil smoke treatment storehouse, smoking board, oil absorption layer, filter layer, chain, ultraviolet tube, smoking motor, monitoring module, rotation axis, copper coil and magnet, the discharge flue is connected with purification layer through collection mouth, purification layer is connected with oil smoke treatment storehouse through smoking unit, the downside welding in oil smoke treatment storehouse has the smoking board, the smoking board is connected with the filter layer through the oil absorption layer, and the smoking board passes through the chain and is connected with smoking unit, ultraviolet tube is installed to the inboard of smoking unit. The range hood type integrated design integrates the functions of oil smoke extraction, filtration and disinfection, has powerful purification function, is provided with a plurality of oil smoke treatment layers, is closed layer by layer, has cleaner oil smoke treatment, has small power and ultra-silence during equipment operation, is energy-saving and environment-friendly, and is an oil smoke treatment device with excellent performance.
CN211084182U discloses a smoke extractor convenient to wash, including mount and collection petticoat pipe, the lower extreme of mount is provided with the face guard, the lower extreme of face guard is provided with the screen panel, be provided with the oil filter screen between face guard and the screen panel, the lower extreme of screen panel is provided with the oil cup, the mount is connected through the pivot rotation to collection petticoat pipe, the both sides of mount are provided with the control frame that control collection petticoat pipe was folded, the carriage fixed connection of mount and face guard through the both sides, the screen panel carries out the joint through joint device and face guard. According to the utility model, the mask can slide at the lower end of the fixing frame through the sliding frame, so that the mask can slide to the outer side of the fixing frame, the inner cavity of the mask is convenient to clean, and the lower end of the fixing frame is convenient to clean; through the joint device, the mode that the screen panel passes through the bolt in the past has been changed for the screen panel can carry out the joint in the lower extreme of screen panel, just with the inner chamber to the screen panel washs.
However, the materials of the existing oil net and the oil cup are mainly stainless steel, after long-term use, greasy dirt is attached to the stainless steel oil net, which can cause difficult cleaning, and after long-term use, adverse phenomena such as rust and the like caused by electrochemical corrosion can also occur, so that the user experience is affected.
Therefore, development of a hydrophobic and oleophobic coating material for a range hood isolates oil stains from a base material of the range hood, so that the cavitation resistance and the easy cleaning performance of the range hood are improved, and the hydrophobic and oleophobic coating material is the key content of current research.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a hydrophobic and oleophobic coating material for a range hood, a preparation method and application thereof, wherein the hydrophobic and oleophobic coating material can be coated on the surfaces of oil cups, oil nets and other base materials of the range hood so as to form a compact coating, and the coating can isolate greasy dirt from being in direct contact with the base materials, has excellent hydrophobic and oleophobic performance and high-temperature corrosion resistance, can further improve the cavitation resistance and easy cleaning performance of the oil nets, and prolongs the service life and user experience of the range hood.
To achieve the purpose, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a hydrophobic and oleophobic coating material for a range hood, which comprises the following components in parts by weight:
wherein the methyltriethoxysilane may be 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, or the like.
The phenyltrimethoxysilane may be 6, 7, 8, 9, 10, 11, 12, 13, 14, etc. parts by weight.
The acidic silica sol may be 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, or the like.
The silane coupling agent may be 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, or the like.
The ethanol may be 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, or the like.
The anti-fouling auxiliary may be 2.3 parts by weight, 2.6 parts by weight, 2.9 parts by weight, 3.2 parts by weight, 3.5 parts by weight, 3.8 parts by weight, 4.1 parts by weight, 4.4 parts by weight, 4.7 parts by weight, or the like.
The main components of the hydrophobic and oleophobic coating material provided by the utility model comprise methyltriethoxysilane, phenyltrimethoxysilane, acidic silica sol and a silane coupling agent, and the four components are matched with each other, so that the obtained hydrophobic and oleophobic coating material forms a compact coating on the surface of a substrate, and the coating has the advantages of hydrophobic and oleophobic properties, higher adhesive force with the substrate, wear resistance, good high temperature resistance, good chemical property stability and difficult corrosion, can isolate oil stains from directly contacting with the substrate, further not only can improve the cavitation resistance of oil cups and oil nets, but also can improve the cleaning performance of the oil cups and the oil nets, thereby prolonging the service life of the range hood.
Specifically, the siloxane in the methyltriethoxysilane, the phenyltrimethoxysilane and the silane coupling agent can be hydrolyzed to generate silanol, the silanol and the acidic silica sol can be further subjected to polycondensation reaction, the shrinkage and polymerization in the direction vertical to the substrate can be generated in the coating along with the drying and dehydration of the coating material on the surface of the substrate, and finally, a uniform and compact inorganic film similar to a ceramic structure is formed on the surface of the substrate, so that oil stains and the substrate are effectively isolated. In addition, the added antifouling auxiliary agent has the main functions of reducing the surface tension of the coating and improving the antifouling and fingerprint-resistant effects of the coating.
Preferably, the methyltriethoxysilane and phenyltrimethoxysilane have a mass of 1 (1 to 1.5), such as 1:1.05, 1:1.1, 1:1.15, 1:1.2, 1:1.25, 1:1.3, 1:1.35, 1:1.4, or 1:1.45.
Preferably, the mass ratio of methyltriethoxysilane to the acidic silica sol is 1 (1.3-1.9), for example 1:1.35, 1:1.4, 1:1.5, 1:1.6, 1:1.7 or 1:1.8, etc.
Preferably, the silane coupling agent comprises gamma-glycidoxypropyl trimethoxysilane.
Preferably, the anti-fouling auxiliary comprises polyether modified polydimethylsiloxane.
Preferably, deionized water is also included in the hydrophobic oleophobic coating material.
Preferably, the content of deionized water in the hydrophobic oleophobic coating material is 0 to 50 parts by weight and is not equal to 0, for example, 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, or the like.
In a second aspect, the present utility model provides a method for preparing a hydrophobic oleophobic coating material according to the first aspect, the method comprising: and mixing methyltriethoxysilane, phenyltrimethoxysilane, acidic silica sol, a silane coupling agent, ethanol, an antifouling additive and optionally deionized water to obtain the hydrophobic oleophobic coating material.
Preferably, the temperature of the mixing is 10 to 30 ℃, e.g., 12 ℃, 14 ℃, 16 ℃, 18 ℃, 20 ℃, 22 ℃, 24 ℃, 26 ℃, 28 ℃, etc.
Preferably, the mixing time is 10 to 30min, for example 12min, 14min, 16min, 18min, 20min, 22min, 24min, 26min or 28min, etc.
Preferably, the mixing is performed under stirring conditions, more preferably under stirring conditions at a rotational speed of less than 800rpm (e.g., 750rpm, 700rpm, 650rpm, 600rpm, 550rpm, 500rpm, 450rpm, etc.).
Preferably, the preparation method comprises the following steps: mixing acidic silica sol with deionized water, adding methyltriethoxysilane, phenyltrimethoxysilane and a silane coupling agent for mixing, adding ethanol and an antifouling additive for mixing, and filtering to obtain the hydrophobic oleophobic coating material.
In a third aspect, the utility model provides an easy-to-clean smoke exhaust ventilator, which comprises an oil net and an oil cup, wherein the surfaces of the oil net and the oil cup are coated with an easy-to-clean coating;
the material of the easy-to-clean coating comprises the hydrophobic oleophobic coating material according to the first aspect.
Preferably, the oil screen comprises a 430 stainless steel oil screen or a 304 stainless steel oil screen.
Preferably, the thickness of the easy-to-clean coating is 3 to 10 μm, for example 4 μm, 5 μm, 6 μm, 7 μm, 8 μm or 9 μm, etc.
In a fourth aspect, the present utility model provides a method for preparing the range hood easy to clean according to the third aspect, the method comprising: and (3) respectively coating the hydrophobic and oleophobic coating material according to the first aspect on the surfaces of an oil net and an oil cup of the range hood, and drying to obtain the easy-to-clean range hood.
Preferably, the drying temperature is 180 to 250 ℃, for example 190 ℃, 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, or the like.
Preferably, the step of pre-treating the oil screen and the oil cup respectively is further included before the coating.
Preferably, the pretreatment comprises the steps of water washing, pre-degreasing, main degreasing and three water washes in sequence.
Preferably, the temperature of the water washing is 40 to 80 ℃, for example, 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃, or the like.
Preferably, the preparation method comprises the following steps:
(1) Washing the oil net and the oil cup of the smoke exhaust ventilator with hot water at 40-80 ℃, pre-degreasing, main degreasing, three times of washing, and drying to obtain a pretreated smoke exhaust ventilator;
(2) And (2) respectively coating the hydrophobic and oleophobic coating material according to the first aspect on the surfaces of the oil net and the oil cup of the pretreatment range hood obtained in the step (1), and drying at 180-250 ℃ to obtain the easy-to-clean range hood.
Compared with the prior art, the utility model has the following beneficial effects:
the hydrophobic and oleophobic coating material for the range hood provided by the utility model comprises the combination of methyltriethoxysilane, phenyltrimethoxysilane, acidic silica sol, a silane coupling agent, ethanol and an antifouling additive, and the methyltriethoxysilane, the phenyltrimethoxysilane, the acidic silica sol and the silane coupling agent are selected to match, so that the obtained hydrophobic and oleophobic coating material can form a compact coating on the surfaces of oil nets, oil cups and other base materials of the range hood, and the coating has the advantages of high hardness (pencil hardness is more than 7H), high adhesion with the base materials, excellent wear resistance, good high temperature resistance, stable chemical property and difficult corrosion; and the coating is hydrophobic and oleophobic, so that direct contact of greasy dirt and base materials such as an oil net or an oil cup can be effectively isolated, the cavitation resistance of the base materials such as the oil cup and the oil net can be improved, the easy-to-clean performance can be improved, and the user experience is improved.
Detailed Description
The technical scheme of the utility model is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the utility model and are not to be construed as a specific limitation thereof.
Example 1
The hydrophobic and oleophobic coating material for the range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided by the embodiment comprises the following steps: at room temperature, placing acidic silica sol (Graves, PW 50) and deionized water into a reaction kettle, stirring uniformly at a speed of less than 800r/min, adding methyltriethoxysilane, phenyltrimethoxysilane and gamma-glycidoxypropyl trimethoxysilane for mixing, adding ethanol and polyether modified polydimethylsiloxane (Pick chemistry, BYK 333) for mixing for 20min, and filtering by using a filter screen with a size of more than 200 meshes to obtain the hydrophobic and oleophobic coating material.
Example 2
The hydrophobic and oleophobic coating material for the range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided in this example is the same as that of example 1.
Example 3
The hydrophobic and oleophobic coating material for the range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided in this example is the same as that of example 1.
Example 4
The hydrophobic and oleophobic coating material for the range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided in this example is the same as that of example 1.
Example 5
The hydrophobic and oleophobic coating material for the range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided in this example is the same as that of example 1.
Example 6
A hydrophobic and oleophobic coating material for a range hood was different from example 1 only in that methyltriethoxysilane was added in an amount of 15 parts by weight and phenyltrimethoxysilane was added in an amount of 5 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Example 7
A hydrophobic and oleophobic coating material for a range hood was different from example 1 only in that methyltriethoxysilane was added in an amount of 5 parts by weight, phenyltrimethoxysilane was added in an amount of 15 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Example 8
A hydrophobic oleophobic coating material for range hoods differing from example 1 only in that methyltriethoxysilane was added in an amount of 6 parts by weight, and an acidic silica sol was added in an amount of 20 parts by weight, and other components, amounts and preparation methods were the same as those of example 1.
Example 9
A hydrophobic oleophobic coating material for range hoods differing from example 1 only in that methyltriethoxysilane was added in an amount of 15 parts by weight, the acidic silica sol was added in an amount of 11 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Comparative example 1
A hydrophobic and oleophobic coating material for a range hood was different from example 1 only in that methyltriethoxysilane was added in an amount of 3 parts by weight, phenyltrimethoxysilane was added in an amount of 17 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Comparative example 2
A hydrophobic and oleophobic coating material for a range hood was different from example 1 only in that methyltriethoxysilane was added in an amount of 17 parts by weight, phenyltrimethoxysilane was added in an amount of 3 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Comparative example 3
A hydrophobic and oleophobic coating material for a range hood, which is free of gamma-glycidol ether oxypropyl trimethoxy silane, and other components, amounts and preparation methods are the same as in example 1.
Comparative example 4
A hydrophobic oleophobic coating material for range hoods, which is different from example 1 only in that the addition amount of the acidic silica sol is 5 parts by weight, and other components, amounts and preparation methods are the same as in example 1.
Comparative example 5
A hydrophobic and oleophobic coating material for a range hood, which was different from example 1 only in that the addition amount of the acidic silica sol was 25 parts by weight, and other components, amounts and preparation methods were the same as in example 1.
Performance test:
sample preparation:
(1) carrying out hot water washing, pre-degreasing, main degreasing and three water washing (first tap water washing and second pure water washing) on the 430 stainless steel base material oil net formed by stamping and welding at 50 ℃ to obtain a pretreated oil net;
(2) spraying a hydrophobic and oleophobic coating material with the thickness of 5 mu m on the pretreated 430 stainless steel substrate oil screen surface by adopting an electrostatic suspension cup, and then drying at a high temperature in a tunnel furnace at 200 ℃ to obtain a sample to be tested.
(1) Film appearance: and visually observing the adverse phenomena of uniformity, flatness, glossiness, polycondensation, particles, warping, falling off and the like of the coating.
(2) Water contact angle: a contact angle tester is adopted to test the water contact angle of the coating in the air;
(3) Oil contact angle: testing the oil contact angle of the coating in the air by adopting a contact angle tester;
(4) Salt spray resistance and corrosion resistance: according to GB/T2423.17 part 2 of the environmental test of Electrical and electronic products: test method test Ka: salt fog "provides a test method for testing.
The hydrophobic and oleophobic coating materials provided in examples 1 to 9 and comparative examples 1 to 5 were tested according to the test methods described above, and the test results are shown in table 1:
TABLE 1
From the data in table 1, it can be seen that: the hydrophobic and oleophobic coating material for the range hood provided by the utility model has the advantages that the integral appearance of film formation on the surface of a base material is good, the coating is uniform and smooth, the glossiness is high, the adverse phenomena of condensation polymerization, particles, warping, falling off and the like do not occur, and the coating has excellent hydrophobic and oleophobic performance, salt fog resistance and corrosion resistance.
It can be further seen from the comparison of the data of examples 1 and examples 5 to 9 that the hydrophobic and oleophobic performance and the salt spray corrosion resistance of the coating can be further improved by limiting the usage ratio of each component in the hydrophobic and oleophobic coating material, specifically, the hydrophobic and oleophobic coating materials provided in examples 1 to 4 are uniform and smooth in appearance after film formation, have higher glossiness, have water contact angles and oil contact angles in air of 95 to 105 degrees and 60 to 63 degrees respectively, and have a salt spray resistance test of up to 450 to 500 hours.
As can be seen from the data of comparative examples 1 and 1-2, an excessively high amount of phenyltrimethoxysilane (comparative example 1) resulted in slight polycondensation of the coating material after film formation, and a decrease in the water and oil repellency and salt spray corrosion resistance of the coating; on the other hand, too low an amount of phenyltrimethoxysilane (comparative example 2) results in a coating having low gloss and reduced water and oil repellency and salt spray corrosion resistance.
As can be seen from further comparison of example 1 and comparative example 3, the absence of the addition of the silane coupling agent resulted in powdering of the coating, poor gloss, and further a significant decrease in the water and oil repellency and salt spray corrosion resistance.
Further, it was found that too low an addition amount of the acidic silica sol (comparative example 4) causes polycondensation of the coating layer, while too high an addition amount of the acidic silica sol (comparative example 5) causes poor particles on the surface of the coating layer.
The applicant states that the present utility model has been described by way of the above examples as a hydrophobic and oleophobic coating material for range hoods and a method of making and using the same, but the present utility model is not limited to, i.e. it is not meant that the present utility model must be practiced in dependence upon the above examples. It should be apparent to those skilled in the art that any modification of the present utility model, equivalent substitution of raw materials for the product of the present utility model, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present utility model and the scope of disclosure.
Claims (19)
1. The hydrophobic and oleophobic coating material for the range hood is characterized by comprising the following components in parts by weight:
5-15 parts by weight of methyltriethoxysilane
5-15 parts by weight of phenyl trimethoxysilane
10-20 parts by weight of acidic silica sol
10-20 parts by weight of silane coupling agent
Ethanol 2-8 parts by weight
2-5 parts of an antifouling additive;
the mass ratio of the methyltriethoxysilane to the phenyltrimethoxysilane is 1 (1-1.5);
the mass ratio of the methyltriethoxysilane to the acidic silica sol is 1 (1.3-1.9);
the silane coupling agent is gamma-glycidol ether oxypropyl trimethoxy silane.
2. The hydrophobic oleophobic coating material of claim 1, wherein the anti-fouling aid comprises a polyether modified polydimethylsiloxane.
3. The hydrophobic oleophobic coating material of claim 1, further comprising deionized water.
4. The hydrophobic and oleophobic coating material according to claim 3, wherein the content of deionized water in the hydrophobic and oleophobic coating material is 0-50 parts by weight and is not equal to 0.
5. A method for preparing the hydrophobic and oleophobic coating material according to any one of claims 1 to 4, wherein the method comprises the following steps: and mixing methyltriethoxysilane, phenyltrimethoxysilane, acidic silica sol, a silane coupling agent, ethanol, an antifouling additive and optionally deionized water to obtain the hydrophobic oleophobic coating material.
6. The method according to claim 5, wherein the temperature of the mixing is 10 to 30 ℃.
7. The method according to claim 5, wherein the mixing time is 10 to 30 minutes.
8. The method according to claim 5, wherein the mixing is performed under stirring.
9. The method of claim 8, wherein the mixing is performed under stirring at a rotational speed of less than 800 rpm.
10. The preparation method according to claim 5, characterized in that it comprises in particular: mixing acidic silica sol with deionized water, adding methyltriethoxysilane, phenyltrimethoxysilane and a silane coupling agent for mixing, adding ethanol and an antifouling additive for mixing, and filtering to obtain the hydrophobic oleophobic coating material.
11. The easy-to-clean smoke exhaust ventilator is characterized by comprising an oil net and an oil cup, wherein the surfaces of the oil net and the oil cup are coated with an easy-to-clean coating;
the material of the easy-to-clean coating comprises the hydrophobic and oleophobic coating material according to any one of claims 1-4.
12. The range hood of claim 11 wherein the oil screen comprises 430 stainless steel oil screen or 304 stainless steel oil screen.
13. The range hood of claim 11, wherein the easy-to-clean coating has a thickness of 3-10 μm.
14. A method for preparing the range hood easy to clean according to any one of claims 11 to 13, comprising the steps of: the hydrophobic and oleophobic coating material according to any one of claims 1-4 is coated on the surfaces of an oil net and an oil cup of the range hood respectively, and is dried to obtain the range hood easy to clean.
15. The method according to claim 14, wherein the drying temperature is 180-250 ℃.
16. The method of claim 14, wherein the pre-coating further comprises the step of pre-treating the oil screen and the oil cup separately.
17. The method of claim 16, wherein the pretreatment comprises the steps of washing with water, pre-degreasing, main degreasing, and three washing with water in this order.
18. The method according to claim 17, wherein the water washing temperature is 40-80 ℃.
19. The preparation method according to claim 14, characterized in that the preparation method comprises the steps of:
(1) Washing an oil net and an oil cup of the smoke exhaust ventilator with hot water at 40-80 ℃, pre-degreasing, main degreasing, three times of washing, and drying to obtain a pretreated smoke exhaust ventilator;
(2) The hydrophobic and oleophobic coating material according to any one of claims 1-4 is respectively coated on the surfaces of an oil net and an oil cup of the pretreatment range hood obtained in the step (1), and is dried at 180-250 ℃ to obtain the easy-to-clean range hood.
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