CN115232490A - Hydrophobic and oleophobic coating material for range hood and preparation method and application thereof - Google Patents
Hydrophobic and oleophobic coating material for range hood and preparation method and application thereof Download PDFInfo
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- CN115232490A CN115232490A CN202210943262.6A CN202210943262A CN115232490A CN 115232490 A CN115232490 A CN 115232490A CN 202210943262 A CN202210943262 A CN 202210943262A CN 115232490 A CN115232490 A CN 115232490A
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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
-
- 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 invention 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 a combination of methyl triethoxysilane, phenyl trimethoxysilane, acidic silica sol, a silane coupling agent, ethanol and an antifouling auxiliary agent, the hydrophobic and oleophobic coating material 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, the coating has the characteristics of hydrophobic and oleophobic properties, high adhesion with a base material, wear resistance, high temperature resistance, stable chemical properties and difficult corrosion, oil stains can be isolated from being directly contacted with the base material, the pore corrosion resistance of the oil cup, the oil net and the like can be improved, the easy cleaning performance of the oil cup, the oil net and the like can be improved, and the service life of the range hood is prolonged.
Description
Technical Field
The invention 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
Along with the continuous improvement of the living standard of people, most kitchens are provided with the smoke exhaust ventilator, air with oil smoke can be exhausted out of the kitchens through the smoke exhaust ventilator, the smell of people choking in the kitchens can be reduced, the oil smoke exhausted by the smoke exhaust ventilator can reduce the oil smoke inhaled by human bodies, and the health of the human bodies is facilitated.
The smoke ventilator is in the in-process of long-term use, and smoke ventilator's inner chamber can store a large amount of grease, and because air inlet oil net is the easiest place of smoking also the easiest dirty place, therefore air inlet oil net's panel need often take off the washing. However, the ventilation holes formed in the panel of the existing air inlet oil net are often formed by punching, so that burrs are easily formed on the edge of the ventilation holes, and people are easily scratched. CN205664452U discloses a multi-functional oil net petticoat pipe, handle storehouse, smoking board, oil absorption layer, filter layer, chain, ultraviolet tube, smoking motor, monitoring module, rotation axis, copper coil and magnet including discharge flue, collection smoke mouth, purification layer, smoke extractor unit, oil smoke, the discharge flue is connected with the purification layer through gathering the smoke mouth, it is connected with the oil smoke processing storehouse to purify the layer through smoke extractor unit, the downside welding in storehouse is handled to the oil smoke has the smoking board, the smoking board passes through the oil absorption layer and is connected with the filter layer, and the smoking board passes through the chain and is connected with smoke extractor unit, ultraviolet tube is installed to smoke extractor unit's inboard. This lampblack absorber formula integrated design, collection oil pumping cigarette and filtration disinfection in an organic whole, purification performance is powerful, is provided with multilayer oil smoke processing layer, closes layer upon layer, and the oil smoke is handled cleaner, and during equipment operation, power is little, the super-silent, and energy-concerving and environment-protective is a set of excellent performance's oil smoke processing apparatus.
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 cleaner screen between face guard and the screen panel, the lower extreme of screen panel is provided with the oil cup, mount and collection petticoat pipe rotate through the pivot to be connected, the both sides of mount are provided with the control frame that control collection petticoat pipe converted into, mount and face guard pass through the carriage fixed connection of both sides, the screen panel carries out the joint through latch device and face guard. The utility model can lead the face mask to slide at the lower end of the fixing frame through the sliding frame, lead the face mask to slide to the outer side of the fixing frame, lead the inner cavity of the face mask to be convenient to clean and conveniently clean the lower end of the fixing frame; through the clamping device, the mode that the mesh enclosure is fixed through the bolts in the past is changed, so that the mesh enclosure can be clamped at the lower end of the mesh enclosure, and the mesh enclosure is cleaned in an inner cavity of the mesh enclosure.
However, the existing oil screen and oil cup are mainly made of stainless steel, and after long-term use, oil stains are attached to the stainless steel oil screen, so that the oil screens are difficult to clean, and after long-term use, electrochemical corrosion can occur to cause bad phenomena such as rusting and the like, and the user experience is influenced.
Therefore, the development of a hydrophobic and oleophobic coating material for the range hood can isolate oil stains from a range hood base material, so that the pore corrosion resistance and the easy-cleaning performance of the range hood are improved, and the important content of the current research is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a hydrophobic and oleophobic coating material for a range hood and a preparation method and application thereof, wherein the hydrophobic and oleophobic coating material can be coated on the surface of a base material such as an oil cup and an oil screen of the range hood so as to form a compact coating, the coating can isolate oil stains from being in direct contact with the base material, and also has excellent hydrophobic and oleophobic properties and high-temperature corrosion resistance, so that the pore corrosion resistance and easy cleaning performance of the oil screen can be improved, the service life of the range hood is prolonged, and the user experience is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention 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 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 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, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, or 7.5 parts by weight, or the like.
The antifouling aid 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 invention comprise methyl triethoxysilane, phenyl trimethoxysilane, acidic silica sol and a silane coupling agent, 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, the coating is hydrophobic and oleophobic, has higher adhesive force with the substrate, also has the advantages of wear resistance, good high temperature resistance, good chemical stability and difficult corrosion, can isolate oil stains from being in direct contact with the substrate, and further can improve the pore corrosion resistance of an oil cup and an oil net, and can also improve the easy cleaning performance of the oil cup and the oil net, thereby prolonging the service life of the range hood.
Specifically, the methyl triethoxysilane, the phenyl trimethoxysilane and the siloxane in the silane coupling agent are hydrolyzed to generate silanol, the silanol and the acidic silica sol are further subjected to condensation polymerization, shrinkage and polymerization in the direction vertical to the substrate can be generated in the coating along with 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 effects of reducing the surface tension of the coating and improving the antifouling and fingerprint-resistant effects of the coating.
Preferably, the methyl triethoxysilane and phenyl trimethoxysilane have a mass of 1 (1 to 1.5), such as 1.
Preferably, the mass ratio of the methyltriethoxysilane to the acidic silica sol is 1 (1.3-1.9), such as 1.
Preferably, the silane coupling agent comprises gamma-glycidoxypropyltrimethoxysilane.
Preferably, the antifouling auxiliary comprises polyether modified polydimethylsiloxane.
Preferably, the hydrophobic and oleophobic coating material also comprises deionized water.
Preferably, the content of the deionized water in the hydrophobic and oleophobic coating material is 0-50 parts by weight and is not equal to 0, such as 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 or 45 parts by weight.
In a second aspect, the present invention provides a method for preparing the hydrophobic and oleophobic coating material according to the first aspect, the method for preparing the hydrophobic and oleophobic coating material comprises: mixing methyl triethoxysilane, phenyl trimethoxysilane, acidic silica sol, a silane coupling agent, ethanol, an antifouling auxiliary agent and optionally deionized water to obtain the hydrophobic and oleophobic coating material.
Preferably, the mixing temperature is 10-30 ℃, such as 12 ℃, 14 ℃, 16 ℃, 18 ℃, 20 ℃, 22 ℃, 24 ℃, 26 ℃ or 28 ℃.
Preferably, the mixing time is 10 to 30min, such as 12min, 14min, 16min, 18min, 20min, 22min, 24min, 26min or 28min, and the like.
Preferably, the mixing is performed under stirring conditions, more preferably at a rotation speed of less than 800rpm (e.g., 750rpm, 700rpm, 650rpm, 600rpm, 550rpm, 500rpm, 450rpm, etc.).
Preferably, the preparation method comprises: mixing acidic silica sol and deionized water, adding methyl triethoxysilane, phenyl trimethoxysilane and a silane coupling agent for mixing, adding ethanol and an antifouling auxiliary agent for mixing, and filtering to obtain the hydrophobic and oleophobic coating material.
In a third aspect, the invention provides an easy-to-clean range hood, which comprises an oil screen and an oil cup, wherein the surfaces of the oil screen and the oil cup are coated with easy-to-clean coatings;
the material of the easy-to-clean coating comprises a hydrophobic and oleophobic coating material as described in the first aspect.
Preferably, the oil screen comprises a 430 stainless steel oil screen or a 304 stainless steel oil screen.
Preferably, the easy-clean coating has a thickness of 3 to 10 μm, such as 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, or 9 μm, and the like.
In a fourth aspect, the present invention provides a method for preparing the easy-to-clean range hood according to the third aspect, wherein the method for preparing the easy-to-clean range hood comprises: and respectively coating the hydrophobic and oleophobic coating material on the surfaces of an oil screen and an oil cup of the range hood, and drying to obtain the range hood easy to clean.
Preferably, the drying temperature is 180 to 250 ℃, such as 190 ℃, 200 ℃, 210 ℃, 220 ℃, 230 ℃ or 240 ℃ and the like.
Preferably, the method further comprises the step of respectively pretreating the oil net and the oil cup before coating.
Preferably, the pretreatment comprises the steps of water washing, pre-degreasing, main degreasing and three-step water washing in sequence.
Preferably, the temperature of the water washing is 40 to 80 ℃, such as 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃ or 75 ℃.
Preferably, the preparation method comprises the following steps:
(1) Carrying out hot water washing, pre-degreasing, main degreasing and three-way water washing on an oil screen and an oil cup of the range hood at the temperature of 40-80 ℃, and drying to obtain a pretreated range hood;
(2) And (2) respectively coating the hydrophobic and oleophobic coating material obtained in the first aspect on the surfaces of the oil mesh and the oil cup of the pre-treated 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 invention has the following beneficial effects:
the hydrophobic and oleophobic coating material for the range hood comprises a combination of methyl triethoxysilane, phenyl trimethoxysilane, acidic silica sol, a silane coupling agent, ethanol and an antifouling auxiliary agent, and the methyl triethoxysilane, the phenyl trimethoxysilane, the acidic silica sol and the silane coupling agent are selected for matching, so that the obtained hydrophobic and oleophobic coating material can form a compact coating on the surface of a base material such as an oil net and an oil cup of the range hood, and the coating has the advantages of high hardness (pencil hardness is more than 7H), high adhesion with the base material, excellent wear resistance, good high temperature resistance, stable chemical performance and difficult corrosion; and the coating is hydrophobic and oleophobic, so that direct contact between oil stain and base materials such as an oil screen or an oil cup can be effectively isolated, the anti-pore corrosion performance of the base materials such as the oil cup and the oil screen is improved, the easy cleaning performance of the base materials is also improved, and the user experience is improved.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A hydrophobic and oleophobic coating material for a 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, acid silica sol (Gray, PW 50) and deionized water are placed in a reaction kettle and stirred uniformly, the stirring speed is less than 800r/min, methyl triethoxysilane, phenyl trimethoxysilane and gamma-glycidyl ether oxypropyl trimethoxysilane are added and mixed, then ethanol and polyether modified polydimethylsiloxane (Bikk chemical, BYK 333) are added and mixed for 20min, and a filter screen with more than 200 meshes is used for filtering, so that the hydrophobic and oleophobic coating material is obtained.
Example 2
A hydrophobic and oleophobic coating material for a range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided by the embodiment is the same as that of the embodiment 1.
Example 3
A hydrophobic and oleophobic coating material for a range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided by the embodiment is the same as that of the embodiment 1.
Example 4
A hydrophobic and oleophobic coating material for a range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided by the embodiment is the same as that of the embodiment 1.
Example 5
A hydrophobic and oleophobic coating material for a range hood comprises the following components in parts by weight:
the preparation method of the hydrophobic and oleophobic coating material provided by the embodiment is the same as that of the embodiment 1.
Example 6
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of methyl triethoxysilane is 15 parts by weight, the addition amount of phenyl trimethoxysilane is 5 parts by weight, and other components, the use amount and the preparation method are the same as those in the embodiment 1.
Example 7
The hydrophobic and oleophobic coating material for the range hood is only different from the hydrophobic and oleophobic coating material in the embodiment 1 in that the addition amount of the methyl triethoxysilane is 5 parts by weight, the addition amount of the phenyl trimethoxysilane is 15 parts by weight, and other components, the using amount and the preparation method are the same as those in the embodiment 1.
Example 8
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of methyl triethoxysilane is 6 parts by weight, the addition amount of acidic silica sol is 20 parts by weight, and other components, the use amount and the preparation method are the same as those in the embodiment 1.
Example 9
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of methyl triethoxysilane is 15 parts by weight, the addition amount of acidic silica sol is 11 parts by weight, and other components, the use amount and the preparation method are the same as those in the embodiment 1.
Comparative example 1
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of methyl triethoxysilane is 3 parts by weight, the addition amount of phenyl trimethoxysilane is 17 parts by weight, and other components, the use amount and the preparation method are the same as those in the embodiment 1.
Comparative example 2
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of methyltriethoxysilane is 17 parts by weight, the addition amount of phenyltrimethoxysilane is 3 parts by weight, and other components, the use amounts and the preparation method are the same as those of the embodiment 1.
Comparative example 3
A hydrophobic and oleophobic coating material for a range hood is not added with gamma-glycidyl ether oxypropyl trimethoxy silane, and other components, the using amount and the preparation method are the same as those in the embodiment 1.
Comparative example 4
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in the embodiment 1 only in that the addition amount of the acidic silica sol is 5 parts by weight, and other components, the use amount and the preparation method are the same as those in the embodiment 1.
Comparative example 5
A hydrophobic and oleophobic coating material for a range hood is different from the hydrophobic and oleophobic coating material in example 1 only in that the addition amount of acidic silica sol is 25 parts by weight, and other components, the use amount and the preparation method are the same as those in example 1.
And (4) performance testing:
sample preparation:
(1) carrying out hot water washing, pre-degreasing, main degreasing and three-step washing (first step tap water washing and second step 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) and (3) spraying a hydrophobic and oleophobic coating material with the thickness of 5 micrometers on the surface of the pretreated 430 stainless steel base material oil screen by adopting electrostatic suspension cup spraying, and then drying at the high temperature of a tunnel furnace at 200 ℃ to obtain a sample to be detected.
(1) Film formation appearance: and (4) observing the uniformity, the flatness and the glossiness of the coating layer by visual observation, and judging whether the undesirable phenomena such as polycondensation, particles, warping, falling and the like occur.
(2) Water contact angle: testing the water contact angle of the coating in the air by using a contact angle tester;
(3) Oil contact angle: testing the oil contact angle of the coating in the air by using a contact angle tester;
(4) Salt mist resistance and corrosion resistance: according to GB/T2423.17 part 2 of environmental test of electrical and electronic products: test methods provided by Ka salt fog were tested.
The hydrophobic and oleophobic coating materials provided in examples 1-9 and comparative examples 1-5 were tested according to the test method described above, and the results are shown in table 1:
TABLE 1
As can be seen from the data in table 1: the hydrophobic and oleophobic coating material for the range hood provided by the invention has the advantages that the film forming appearance on the surface of the base material is integrally good, the coating is uniform and smooth, the glossiness is high, the adverse phenomena of polycondensation, particles, warping, falling and the like are avoided, and the coating has excellent hydrophobic and oleophobic properties and salt mist resistance and corrosion resistance.
It can be seen from the comparison of the data of example 1 and examples 5 to 9 that the water and oil repellent performance and the salt spray corrosion resistance of the coating can be further improved by limiting the dosage ratio of each component in the water and oil repellent coating material, specifically, the water and oil repellent coating materials provided by examples 1 to 4 have uniform and flat appearance and high gloss after film formation, the water contact angle and the oil contact angle in air are 95 to 105 degrees and 60 to 63 degrees respectively, and the salt spray resistance test is as high as 450 to 500 hours.
Comparing the data of example 1 and comparative examples 1-2, it can be seen that the use of phenyltrimethoxysilane in an excessive amount (comparative example 1) results in slight polycondensation of the coating material after film formation, and the hydrophobic and oleophobic properties and salt spray corrosion resistance of the coating are reduced; the use of phenyltrimethoxysilane in too low an amount (comparative example 2) leads to coatings with low gloss and reduced water and oil repellency and salt-spray corrosion resistance.
Comparing example 1 with comparative example 3 again, it can be seen that the absence of the silane coupling agent results in the pulverization of the coating, the poor glossiness, and the substantial decrease of the hydrophobic and oleophobic properties and the salt-spray corrosion resistance.
Further comparing example 1 with comparative examples 4 to 5, it was found that too low an amount of acidic silica sol (comparative example 4) also resulted in polycondensation of the coating, while too high an amount of acidic silica sol (comparative example 5) resulted in poor particles on the surface of the coating.
The applicant states that the invention is illustrated by the above examples to a hydrophobic and oleophobic coating material for range hoods and a preparation method and application thereof, but the invention is not limited to the above examples, that is, it does not mean that the invention must be implemented by the above examples. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The hydrophobic and oleophobic coating material for the range hood is characterized by comprising the following components in parts by weight:
2. the hydrophobic and oleophobic coating material of claim 1, characterized in that the mass ratio of the methyl triethoxysilane to the phenyl trimethoxysilane is 1 (1-1.5);
preferably, the mass ratio of the methyl triethoxysilane to the acidic silica sol is 1 (1.3-1.9).
3. The hydrophobic and oleophobic coating material of claim 1 or 2, wherein the silane coupling agent comprises gamma-glycidoxypropyltrimethoxysilane;
preferably, the antifouling auxiliary comprises polyether modified polydimethylsiloxane;
preferably, the hydrophobic and oleophobic coating material also comprises deionized water;
preferably, the content of the deionized water in the hydrophobic and oleophobic coating material is 0-50 parts by weight and is not equal to 0.
4. A method for preparing a hydrophobic and oleophobic coating material according to any of claims 1-3, characterized in that the method comprises: mixing methyl triethoxysilane, phenyl trimethoxysilane, acidic silica sol, a silane coupling agent, ethanol, an antifouling auxiliary agent and optionally deionized water to obtain the hydrophobic and oleophobic coating material.
5. The method according to claim 4, wherein the temperature of the mixing is 10 to 30 ℃;
preferably, the mixing time is 10-30 min;
preferably, the mixing is carried out under stirring conditions, more preferably under stirring conditions at a rotation speed of less than 800 rpm;
preferably, the preparation method specifically comprises: mixing acidic silica sol with deionized water, adding methyl triethoxysilane, phenyl trimethoxysilane and a silane coupling agent for mixing, adding ethanol and an antifouling auxiliary agent for mixing, and filtering to obtain the hydrophobic and oleophobic coating material.
6. An easy-to-clean range hood is characterized by comprising an oil screen and an oil cup, wherein the surfaces of the oil screen and the oil cup are coated with easy-to-clean coatings;
the material of the easy-to-clean coating comprises the hydrophobic and oleophobic coating material according to any one of claims 1-3.
7. The easy clean range hood of claim 6, wherein the oil screen comprises a 430 stainless steel oil screen or a 304 stainless steel oil screen;
preferably, the easy-to-clean coating has a thickness of 3 to 10 μm.
8. A preparation method of the easy-to-clean range hood as claimed in claim 6 or 7, wherein the preparation method comprises the following steps: the hydrophobic and oleophobic coating material according to any one of claims 1-3 is respectively coated on the surfaces of an oil screen and an oil cup of a range hood and dried to obtain the range hood easy to clean.
9. The method according to claim 8, wherein the drying temperature is 180 to 250 ℃.
10. The method according to claim 8 or 9, wherein the step of pre-treating the oil screen and the oil cup before coating is further included;
preferably, the pretreatment comprises the steps of water washing, pre-degreasing, main degreasing and three-step water washing in sequence;
preferably, the temperature of the water washing is 40-80 ℃;
preferably, the preparation method comprises the following steps:
(1) Carrying out hot water washing, pre-degreasing, main degreasing and three-way washing on an oil screen and an oil cup of the range hood at the temperature of 40-80 ℃, and drying to obtain a pretreated range hood;
(2) Respectively coating the hydrophobic and oleophobic coating material according to any one of claims 1-3 on the surfaces of the oil mesh and the oil cup of the pretreated range hood obtained in the step (1), and drying at 180-250 ℃ to obtain the easy-to-clean range hood.
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| EP4242522A3 (en) * | 2023-02-02 | 2024-01-10 | Whirlpool Corporation | Kitchen exhaust appliance |
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