CN209763850U - Coated aluminum foil, heat exchanger, air conditioner and refrigeration equipment - Google Patents
Coated aluminum foil, heat exchanger, air conditioner and refrigeration equipment Download PDFInfo
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Abstract
The utility model provides a coating aluminium foil, heat exchanger, air conditioner and refrigeration plant. Wherein, the coating aluminium foil includes: an aluminum foil substrate; a hydrophilic layer disposed on at least one surface of the aluminum foil substrate, and containing an oleophobic agent therein. The inventor finds that the coating aluminum foil is simple in structure and easy to realize, and the surface of the coating aluminum foil has hydrophilic and oleophobic surface characteristics, so that the coating aluminum foil can still normally work under the condition of oily substances.
Description
Technical Field
The utility model relates to a technical field that coats, it is specific, relate to coating aluminium foil, heat exchanger, air conditioner and refrigeration plant.
Background
At present, the related standards and research and development processes of the coated aluminum foil rarely consider the influence of the adhesion of oily substances on the surface of the coated aluminum foil on the performance of the coated aluminum foil. However, the coated aluminum foil is inevitably affected by oily volatile substances in the actual use process, and particularly in places close to kitchens, factories, oil fields and the like, the oily volatile substances in the air are high in content and are easy to adhere to the surface of the coated aluminum foil, so that the hydrophilicity of the coated aluminum foil is reduced, and further, the abnormal problems of the air quantity and the energy efficiency attenuation of the heat exchanger, water blowing and the like are caused. Thus, the current coated aluminum foil is still under investigation.
SUMMERY OF THE UTILITY MODEL
the present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses an aim at propose one kind have hydrophilic oleophobic effect's coating aluminium foil, perhaps contain the heat exchanger of this coating aluminium foil still can normally work under oily material condition.
In one aspect of the present invention, the present invention provides a coated aluminum foil. According to the utility model discloses an embodiment, this coating aluminium foil includes: an aluminum foil substrate; a hydrophilic layer disposed on at least one surface of the aluminum foil substrate, and containing an oleophobic agent therein. The inventor finds that the coating aluminum foil is simple in structure and easy to realize, the surface of the coating aluminum foil has excellent hydrophilicity and oleophobic property, when the coating aluminum foil works under the condition of oily substances, under the combined action of the oleophobic agent and the hydrophilic material in the hydrophilic layer, water can spread on the surface of the coating aluminum foil and take away the oily substances, the problems that the air volume is reduced, water is blown and the like due to the fact that the hydrophilic property of the coating aluminum foil is attenuated due to the adhesion of the oily substances are avoided, the coating aluminum foil can still normally work under the condition of the oily substances, the service life of the coating aluminum foil is prolonged, and further, a heat exchanger, an air conditioner and refrigeration equipment containing the coating aluminum foil can normally work on the occasion containing the oily volatile substances.
according to an embodiment of the utility model, oleophobic agent includes: a fluoroacrylate, or a fluoropolyether. Therefore, the oil repellent agent contains the fluorine-containing oil repellent group, the oil repellent effect is excellent, and the coated aluminum foil can work normally in the situation of oil-containing volatile matters under the synergistic effect of the oil repellent agent and the hydrophilic material.
According to embodiments of the present invention, the fluoroacrylate includes homopolymers and copolymers of fluoroacrylates, perfluoroalkyl acrylates or perfluoroalkyl methacrylates. Therefore, the material has wide sources, better oleophobic effect and low price, and is beneficial to the mass production of the coating aluminum foil with the oleophobic effect.
According to an embodiment of the present invention, the fluoropolyether comprises perfluoropolyether or functional end group modified perfluoropolyether. Therefore, the material has wide sources, better oleophobic effect and low price, and is beneficial to the mass production of the coating aluminum foil with the oleophobic effect.
According to an embodiment of the invention, the hydrophilic material in the hydrophilic layer comprises acrylic resin. Therefore, the hydrophilic layer can be formed by utilizing a photocuring or thermocuring mode, the preparation method is flexible and various, the preparation method is suitable for large-scale production, the synergistic effect between the hydrophilic material and the oleophobic agent is better, and the improvement of the hydrophilic and oleophobic effects of the coating aluminum foil is facilitated.
According to an embodiment of the present invention, the thickness of the hydrophilic layer is 0.1 to 2 microns. Therefore, the hydrophilic layer has good hydrophilic and oleophobic effects and long service life.
According to the utility model discloses an embodiment, oil is in the contact angle on coating aluminium foil surface is greater than water the contact angle on coating aluminium foil surface. Therefore, under the condition of an oil-water mixture, water is more easily soaked and spread on the surface of the coated aluminum foil, so that the water is soaked and spread on the surface of the coated aluminum foil and takes away oily substances, the problems of air volume reduction, water blowing and the like caused by the fact that the hydrophilic performance of the coated aluminum foil is attenuated due to the attachment of the oily substances are avoided, and the air conditioner, the refrigeration equipment and the heat exchanger can normally operate on occasions containing oily volatile matters.
According to an embodiment of the present invention, the contact angle of oil on the surface of the coated aluminum foil is at least 30 ° greater than the contact angle of water on the surface of the coated aluminum foil. Therefore, under the condition of an oil-water mixture, the effect of taking away oily substances by water immersion and spreading is better, so that the coating aluminum foil can keep good hydrophilicity in the long-term use process.
According to the utility model discloses an embodiment, the coating aluminium foil still includes anti-corrosion coating, anti-corrosion coating is formed the aluminium foil substrate with between the hydrophilic layer. Therefore, the coating aluminum foil has good corrosion resistance, and the service life of the coating aluminum foil can be obviously prolonged.
According to an embodiment of the present invention, the material forming the corrosion protection layer comprises epoxy, acrylic or polyurethane. Therefore, the material source is wide, the cost is low, and the corrosion resistance is good.
According to an embodiment of the invention, the thickness of the corrosion protection layer is between 0.1 and 2 micrometers. Therefore, the anti-corrosion layer is appropriate in thickness and excellent in anti-corrosion effect, and the service life of the coating aluminum foil is prolonged.
According to the embodiment of the invention, the thickness of the aluminum foil substrate is 0.08 mm-0.2 mm. Therefore, the aluminum foil substrate is appropriate in thickness, good in strength, convenient to prepare and low in cost.
In another aspect of the present invention, the utility model provides a heat exchanger. According to an embodiment of the present invention, at least a portion of the heat exchanger is prepared from the coated aluminum foil described above. The inventor finds that the heat exchanger is simple in structure, easy to realize, capable of normally working under the condition of oily substances, wide in application scene and extremely easy to favor of consumers.
In another aspect of the present invention, the present invention provides an air conditioner. According to the utility model discloses an embodiment, this air conditioner includes preceding heat exchanger. The inventor finds that the air conditioner can still normally work under the condition of oily substances, has high air volume and high energy efficiency, hardly has the problem of water blowing, has long service life and wide application scenes.
In another aspect of the present invention, the present invention provides a refrigeration device. According to the utility model discloses an embodiment, this refrigeration plant includes the heat exchanger of preceding. The inventor finds that the refrigeration equipment can still normally work under the condition of oily substances, has good refrigeration effect and long service life.
Drawings
Fig. 1 is a schematic structural diagram of a coated aluminum foil according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a coated aluminum foil according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a coated aluminum foil according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a coated aluminum foil according to another embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In one aspect of the present invention, the present invention provides a coated aluminum foil. According to the utility model discloses an embodiment, this coating aluminium foil includes: referring to fig. 1 and 2, an aluminum foil substrate 100; a hydrophilic layer 200, wherein the hydrophilic layer 200 is disposed on at least one surface of the aluminum foil substrate 100, and the hydrophilic layer 200 contains an oil repellent. The inventor finds that the coating aluminum foil is simple in structure and easy to realize, the surface of the coating aluminum foil has excellent hydrophilicity and oleophobicity under the combined action of the hydrophilic material and the oleophobic agent in the hydrophilic layer, when the coating aluminum foil works under the condition of oily substances, water can spread on the surface of the coating aluminum foil and take away the oily substances under the combined action of the oleophobic agent and the hydrophilic material in the hydrophilic layer, the problems that the air volume is reduced, water blowing and the like are caused by the fact that the hydrophilic performance of the coating aluminum foil is attenuated due to the adhesion of the oily substances are avoided, the coating aluminum foil can still normally work under the condition of the oily substances, the service life of the coating aluminum foil is prolonged, and the coating aluminum foil can keep good hydrophilicity in the long-term use process; furthermore, the heat exchanger, the air conditioner and the refrigeration equipment containing the coated aluminum foil can normally operate on occasions containing oil volatile matters, and can keep good working efficiency in the long-term use process.
According to an embodiment of the present invention, to further improve the hydrophilic and oleophobic effect of the coated aluminum foil, the oleophobic agent comprises 0.2 wt% to 6 wt% (e.g. 0.2 wt%, 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, etc.) of the hydrophilic material based on the total mass of the hydrophilic material in the hydrophilic layer. From this, the ratio of oleophobic agent and hydrophilic material is in above-mentioned within range, and the oleophobic agent can be even dispersion in hydrophilic layer, and hydrophilic oleophobic effect of hydrophilic layer is better, and under the condition that has oil water mixture, water more easily soaks on hydrophilic layer's surface and spreads, takes away the oily substance on hydrophilic layer surface more easily to effectively avoid the problem that the amount of wind reduces and blows water, make heat exchanger, air conditioner and the refrigeration plant who contains above-mentioned coating aluminium foil can normally operate in the occasion that contains oily volatile substance. With respect to the above content range, when the amount of the oil repellent agent occupying the hydrophilic material is too small, the oil repellent effect is not good, and when the amount of the oil repellent agent occupying the hydrophilic material is too large, the hydrophilic effect becomes poor, and the cost is high.
According to an embodiment of the utility model, oleophobic agent includes: at least one of a fluoroacrylate and a fluoropolyether. Therefore, the oil repellent agent contains the fluorine-containing oil repellent group, the oil repellent effect is excellent, and the coated aluminum foil can work normally in the situation of oil-containing volatile matters under the synergistic effect of the oil repellent agent and the hydrophilic material.
In some embodiments of the present invention, the fluoroacrylate includes homopolymers and copolymers of fluoroacrylates, perfluoroalkyl acrylates or perfluoroalkyl methacrylates. In some embodiments of the present invention, the fluoropolyether comprises a perfluoropolyether or a functional end-group modified perfluoropolyether. Therefore, the material has wide sources, better oleophobic effect and low price, and is beneficial to the mass production of the coating aluminum foil with the oleophobic effect.
According to the embodiment of the utility model, after adding above-mentioned oleophobic agent in hydrophilic layer, hydrophilic layer surface has hydrophilic group and fluorine-containing oleophobic group, and fluorine-containing group because it has low surface energy, tends to distribute outermost. Under the synergistic effect of the hydrophilic material and the oleophobic agent, when the surface of the hydrophilic layer has water, the hydrophilic group is in an extension state and interacts with the water, so that the tension of a water-solid interface is reduced, and the fluorine-containing oleophobic group is in a state of being coated by the hydrophilic group at the moment, so that the influence on the contact angle of the water is small, and the contact angle of the water is small. When the surface of the hydrophilic layer is contacted with oil, the hydrophilic group has no obvious effect on the oil and is in a contracture state, and the fluorine-containing oleophobic group is stretched to the outermost side again, so that an oleophobic effect is generated, and an excellent hydrophilic and oleophobic effect is achieved.
In some embodiments of the present invention, when the surface of the hydrophilic layer is in contact with the oil-water mixture, the contact angle of oil on the surface of the coated aluminum foil is larger than the contact angle of water on the surface of the coated aluminum foil. Therefore, under the condition of an oil-water mixture, water is more easily soaked and spread on the surface of the coated aluminum foil, so that the water is soaked and spread on the surface of the coated aluminum foil and takes away oily substances, the problems of air volume reduction, water blowing and the like caused by the fact that the hydrophilic performance of the coated aluminum foil is attenuated due to the attachment of the oily substances are avoided, and the air conditioner, the refrigeration equipment and the heat exchanger can normally operate on occasions containing oily volatile matters. In some embodiments of the present invention, the contact angle of oil on the surface of the coated aluminum foil is at least 30 ° (e.g., 30 °, 32 °, 34 °, 36 °, 38 °, 40 °, etc.) greater than the contact angle of water on the surface of the coated aluminum foil. Therefore, under the condition of an oil-water mixture, the effect of taking away oily substances by water immersion and spreading is better, so that the coated aluminum foil can keep good hydrophilicity in the long-term use process.
According to an embodiment of the present invention, the thickness of the hydrophilic layer is 0.1 micron to 2 microns, such as 0.1 micron, 0.2 micron, 0.3 micron, 0.4 micron, 0.5 micron, 0.6 micron, 0.7 micron, 0.8 micron, 0.9 micron, 1.0 micron, 1.1 micron, 1.2 micron, 1.3 micron, 1.4 micron, 1.5 micron, 1.6 micron, 1.7 micron, 1.8 micron, 1.9 micron, 2.0 micron and the like. Therefore, the hydrophilic layer has good hydrophilic and oleophobic effects and long service life. For above-mentioned thickness range, when hydrophilic layer's thickness is too thin, then hydrophilic effect is relatively poor, and hydrophilicity attenuates easily, when hydrophilic layer's thickness is too thick, then influences coefficient of heat conductivity and heat transfer effect, and the cost is too high.
According to the utility model discloses an embodiment, in order to make hydrophilic layer possess the hydrophilicity of preferred, hydrophilic material includes acrylic resin. Therefore, the hydrophilic material has excellent hydrophilic effect, the hydrophilic layer can be formed by utilizing a photocuring or thermocuring mode, the preparation method is flexible and various, and the preparation method is suitable for large-scale production.
According to the embodiment of the present invention, when the hydrophilic layer is formed by using a thermosetting method, the raw material for forming the hydrophilic layer includes a thermosetting type coating. In some embodiments of the present invention, the thermosetting coating includes 8 wt% to 15 wt% (8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, etc.) of an acrylic resin, 2.5 wt% to 3.5 wt% (2.5 wt%, 2.6 wt%, 2.7 wt%, 2.8 wt%, 2.9 wt%, 3.0 wt%, 3.1 wt%, 3.2 wt%, 3.3 wt%, 3.4 wt%, 3.5 wt%, etc.) of an alcohol ether solvent and the balance of water, based on the total mass of the thermosetting coating, and the alcohol ether solvent and water are volatilized during curing of the thermosetting coating to finally form a hydrophilic material containing an acrylic resin. Thus, since the acrylic resin is excellent in hydrophilic effect, the hydrophilic effect of the hydrophilic material formed after thermal curing is excellent. Based on this, in some embodiments of the present invention, the manner of forming the hydrophilic layer may include the following: and mixing the oleophobic agent and the thermosetting coating, coating the mixture on the surface of an aluminum foil substrate, and curing the coating to obtain a hydrophilic layer with a hydrophilic and oleophobic effect, wherein the hydrophilic material in the hydrophilic layer is acrylic resin. Therefore, the method is simple and convenient to operate and easy to realize, and the formed hydrophilic layer has excellent hydrophilic effect and oleophobic effect and is particularly suitable for working under the condition of containing oily substances.
According to the utility model discloses an embodiment, when utilizing the mode of photocuring to form hydrophilic material, the raw materials that form hydrophilic material include photocuring type coating. In some embodiments of the present invention, the photocurable coating includes 10 wt% to 30 wt% (e.g., 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 9 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, etc.) of sulfonate monomers (e.g., which may include, but is not limited to, sodium vinyl sulfonate, sodium allyl sulfonate, etc.), 30 wt% to 70 wt% (e.g., 30 wt%, 35 wt%, 40 wt%, 45 wt%, 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, etc.) of photocurable emulsions (e.g., including, but not limited to, epoxy acrylate emulsions, polyurethane acrylate emulsions, or polyester acrylate emulsions, which crosslink during photocuring to form acrylic resins), based on the total mass of the photocurable coating, 8 to 30 wt.% (such as 8, 9, 10, 11, 12, 13, 14, 15, 16, 7, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, etc.) of a multifunctional reactive diluent (such as, but not limited to, tripropylene glycol acrylate, trimethylolpropane triacrylate, etc.), 0.5 to 5 wt.% (such as, but not limited to, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.) of a photoinitiator (such as, but not limited to, 2-methyl-2-hydroxy-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ethyl ketone, etc.), 0.1 to 2 wt.% (such as, 0.1 wt.%), 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1.0 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, 1.6 wt%, 1.7 wt%, 1.8 wt%, 1.9 wt%, 2.0 wt%, etc.) and the balance of a solvent (including, but not limited to, butyl acetate, propyl acetate, ethyl acetate, acetone, etc.) can be cured by ultraviolet light to obtain an acrylic resin modified with sulfonic acid groups, which is more excellent in hydrophilic effect, and thus, the hydrophilic effect of the hydrophilic layer can be further improved. In some embodiments of the present invention, the manner of forming the hydrophilic layer may include the following: and in the hydrophilic layer, the photocuring emulsion is crosslinked to form acrylic resin in the curing process, and meanwhile, sulfonate reacts with acrylate to form sulfonate modified acrylic resin, and the hydrophilic material can be acrylic resin or acrylic resin modified by sulfonic acid groups. Therefore, the method is simple and convenient to operate and easy to realize, and the formed hydrophilic layer has excellent hydrophilic effect and oleophobic effect and is particularly suitable for working under the condition of containing oily substances.
According to an embodiment of the present invention, in order to extend the service life of the coated aluminum foil, referring to fig. 3 and 4, the coated aluminum foil further includes a corrosion prevention layer 300, the corrosion prevention layer 300 being formed between the aluminum foil substrate 100 and the hydrophilic layer 200. Therefore, the coating aluminum foil has good corrosion resistance, and the service life of the coating aluminum foil can be obviously prolonged.
According to an embodiment of the present invention, the material forming the corrosion protection layer includes epoxy resin, acrylic resin, polyurethane, or the like. Therefore, the material has wide sources, low cost and good corrosion resistance, and can have good adhesive force with the hydrophilic layer and the aluminum foil substrate.
According to an embodiment of the invention, the thickness of the corrosion protection layer is 0.1 to 2 micrometers (e.g. 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0 micrometers, etc.). Therefore, the anti-corrosion layer is appropriate in thickness and excellent in anti-corrosion effect, and the service life of the coating aluminum foil is prolonged. Compared with the thickness range, when the thickness of the anti-corrosion layer is too thin, the corrosion resistance is poor, and when the thickness of the anti-corrosion layer is too thick, the heat conductivity coefficient and the heat exchange effect are influenced, and the cost is high
According to an embodiment of the present invention, the thickness of the aluminum foil substrate is 0.08 mm to 0.2 mm, such as 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, etc. Therefore, the aluminum foil substrate is appropriate in thickness, good in strength, convenient to prepare and low in cost.
In another aspect of the present invention, the utility model provides a heat exchanger. According to an embodiment of the present invention, at least a portion of the heat exchanger is prepared from the coated aluminum foil described above. The inventor finds that the heat exchanger is simple in structure, easy to implement, capable of normally working under the condition of oily substances, high in energy efficiency, wide in application scene and very popular with consumers.
According to the embodiment of the utility model, the fin of above-mentioned heat exchanger can be obtained by the preparation of coating aluminium foil, and from this, the hydrophilic oleophobic effect of fin of heat exchanger is excellent for the heat exchanger still can normally work under having oily material condition, and the amount of wind is high, and the efficiency is high, can not appear blowing the water problem hardly, performance preferred.
According to the embodiment of the present invention, the heat exchanger may be a condenser or an evaporator, and the heat exchanger may include, besides the foregoing coated aluminum foil, a structure that a conventional heat exchanger should have, for example, but not limited to, a heat pipe, and the like, which is not described herein in too much detail.
In another aspect of the present invention, the present invention provides an air conditioner. According to the utility model discloses an embodiment, this air conditioner includes preceding heat exchanger. The inventor finds that the air conditioner can still normally work under the condition of oily substances, has high air volume, hardly has the problem of water blowing, has long service life and wide application scenes.
According to the utility model discloses an embodiment, the kind of air conditioner is not particularly restricted, as long as can satisfy the requirement, and the skilled person in the art can be according to actual need nimble selection. For example, the types of air conditioners may be a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling air conditioner, etc., and are not described herein in detail; the structure of the air conditioner includes the heat exchanger, and also includes the structure that the conventional air conditioner should have, such as a compressor, a centrifugal fan, a motor, a temperature controller, etc., which are not described in detail herein.
In another aspect of the present invention, the present invention provides a refrigeration device. According to the utility model discloses an embodiment, this refrigeration plant includes the heat exchanger of preceding. The inventor finds that the refrigeration equipment can still normally work under the condition of oily substances, has good refrigeration effect and long service life.
According to the embodiment of the present invention, the refrigeration device may further include, besides the heat exchanger, a structure that a conventional refrigeration device should have, such as but not limited to a compressor, a housing, etc., which is not described herein again; the type of the refrigeration equipment is not particularly limited, and those skilled in the art can flexibly select the refrigeration equipment according to the actual needs as long as the requirements can be met, for example, the type of the refrigeration equipment may include, but is not limited to, a refrigerator, an ice chest, a showcase, or the like.
According to the utility model discloses an embodiment, ordinary coating aluminium foil is under the condition that contains oily volatile substance, and the surface is because oil adheres to easily to make hydrophilicity descend, lead to air conditioner, refrigeration plant to produce serious amount of wind and reduce and blow water problem. And the utility model discloses in, through adding oleophobic agent in hydrophilic layer for hydrophilic layer has hydrophilic oleophobic effect, under the condition that has oil water mixture, water is more easy to be soaked at the surface and is spreaded, thereby make water soak at coating aluminium foil surface and spread and take away oily material, thereby avoid reducing the amount of wind that the hydrophilic performance decay of the coating aluminium foil that leads to because of oily material adheres to and blow water scheduling problem, make air conditioner, refrigeration plant can be in the occasion normal operating of oily volatile substance.
Embodiments of the present application are described in detail below.
Examples
Contact angle test method: and testing the water contact angle and the oil (n-hexadecane) contact angle of the surface of the coated aluminum foil, taking out the coated aluminum foil after soaking in the oil (n-hexadecane) for 1h, naturally drying, testing the water contact angle and the oil contact angle of the surface of the coated aluminum foil, and comparing the difference of the contact angles before and after oil immersion treatment.
Example 1
The structure and composition of the coating aluminum foil are as follows:
Hydrophilic layer: the thickness is 0.8 micron, the hydrophilic layer comprises acrylic resin and fluoropolyether, the fluoropolyether accounts for 4 wt% of the total mass of the acrylic resin,
The method for forming the hydrophilic layer comprises the steps of mixing a mixed solution containing 12 wt% of acrylic resin, 3 wt% of alcohol ether solvent and the balance of water with fluoropolyether, coating the mixture on the surface of an aluminum foil substrate, and heating and curing to form the hydrophilic layer;
Aluminum foil substrate: the thickness was 0.095 mm.
Example 2
The structure and composition of the coating aluminum foil are as follows:
An anti-corrosion layer: the thickness is 0.6 microns, and an anti-corrosion layer is formed on the surface of the aluminum foil substrate by a roll coating process by adopting acrylic resin.
hydrophilic layer: the thickness is 0.7 microns, the hydrophilic layer comprises acrylic resin and fluorine-containing acrylate, the fluorine-containing acrylate accounts for 5 wt% of the total mass of the acrylic resin (comprising the acrylic resin and the sulfonate modified acrylic resin),
The method for forming the hydrophilic layer comprises the steps of mixing a mixed solution containing 15 wt% of sodium allylsulfonate, 60 wt% of epoxy acrylate emulsion, 10 wt% of tripropylene glycol acrylate, 1 wt% of 2-methyl-2-hydroxy-1-phenyl acetone, 1 wt% of a leveling agent and the balance of butyl acetate with fluorine-containing acrylate, coating the mixture on the surface of the corrosion-resistant layer, which is far away from the aluminum foil substrate, and forming the hydrophilic layer after photocuring;
Aluminum foil substrate: the thickness was 0.095 mm.
Example 3
The structure and composition of the coated aluminum foil of this example were the same as those of example 2, except that the fluorine-containing acrylate in the hydrophilic layer was 0.2 wt% based on the total mass of the acrylic resin.
Example 4
The structure and composition of the coated aluminum foil of this example were the same as those of example 2, except that the fluorine-containing acrylate in the hydrophilic layer was 6 wt% based on the total mass of the acrylic resin.
comparative example 1
The coated aluminum foil of this comparative example was identical in structure and composition to example 1, except that the hydrophilic layer did not contain fluoropolyether.
Example 5
The coated aluminum foil of this comparative example had the same structure and composition as example 1 except that the fluoropolyether in the hydrophilic layer accounted for 0.05 wt% of the total mass of the acrylic resin.
Example 6
The coated aluminum foil of this comparative example had the same structure and composition as example 1 except that the fluoropolyether in the hydrophilic layer accounted for 10 wt% of the total mass of the acrylic resin.
The results of the performance test of the coated aluminum foils of examples 1 to 6 and comparative example 1 are shown in table 1.
TABLE 1
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (14)
1. A coated aluminum foil, comprising:
An aluminum foil substrate;
A hydrophilic layer disposed on at least one surface of the aluminum foil substrate, and containing an oleophobic agent therein.
2. The coated aluminum foil of claim 1 wherein the oleophobic agent comprises a fluoroacrylate or a fluoropolyether.
3. The coated aluminum foil of claim 2 wherein the fluorine-containing acrylate comprises homopolymers and copolymers of fluorine-containing acrylates, perfluoroalkyl acrylates or perfluoroalkyl methacrylates.
4. The coated aluminum foil of claim 2 wherein the fluoropolyether comprises perfluoropolyether or functional end-group modified perfluoropolyether.
5. The coated aluminum foil of claim 1, wherein the hydrophilic layer has a thickness of 0.1 to 2 microns.
6. The coated aluminum foil of claim 1, wherein a contact angle of oil on the surface of the coated aluminum foil is larger than a contact angle of water on the surface of the coated aluminum foil.
7. The coated aluminum foil of claim 6, wherein a contact angle of oil on the surface of the coated aluminum foil is at least 30 ° greater than a contact angle of water on the surface of the coated aluminum foil.
8. The coated aluminum foil of claim 1, further comprising a corrosion protection layer formed between the aluminum foil substrate and the hydrophilic layer.
9. The coated aluminum foil of claim 8, wherein the material forming the corrosion protection layer comprises epoxy, acrylic, or polyurethane.
10. The coated aluminum foil of claim 8, wherein the corrosion protection layer has a thickness of 0.1 to 2 microns.
11. The coated aluminum foil as recited in claim 1, wherein the aluminum foil substrate has a thickness of 0.08 mm to 0.2 mm.
12. A heat exchanger, characterized in that at least a part of the heat exchanger is made from a coated aluminum foil according to any one of claims 1-11.
13. An air conditioner characterized by comprising the heat exchanger of claim 12.
14. A refrigeration apparatus comprising the heat exchanger of claim 12.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520363A (en) * | 2018-12-11 | 2019-03-26 | 广东美的制冷设备有限公司 | Coated aluminum foil, heat exchanger, air conditioner and refrigeration equipment |
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2018
- 2018-12-11 CN CN201822077577.9U patent/CN209763850U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520363A (en) * | 2018-12-11 | 2019-03-26 | 广东美的制冷设备有限公司 | Coated aluminum foil, heat exchanger, air conditioner and refrigeration equipment |
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