• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a component of domestic appliance (1), which comprises a base element (4), wherein at least one surface of the base element (4) is covered at least in some areas with a structure of functional layers (2). ). The structure of functional layers (2) comprises at least one superhydrophilic layer (3) containing polidopamine (pda). Also, the invention relates to a method for coating a component of domestic appliance (1), a household appliance comprising at least one component of household appliance (1), and the use of polidopamine (pda) to form a layer superhydrophilic (3) at least in some areas of a base element (4) of a domestic appliance component (1). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2597727A1
    申请号:ES201531062
    申请日:2015-07-20
    公开日:2017-01-20
    发明作者:María Carmen Artal Lahoz；Mehmet Bayindir；Miguel Ángel BUNUEL MAGDALENA；Cristina CASTRO LAPETRA；Bihter DAGLAR；Tugba DISPINAR；Elena MARTÍNEZ SOLANAS；Javier Sanz Naval；Adem YILDIRIM；Murat YÜCEL；Dilara ÖKSÜZ
    申请人:BSH Hausgeraete GmbH；BSH Electrodomesticos Espana SA；
    IPC主号:
    专利说明:

    The invention refers to a household appliance component, which comprises a base element, where at least one surface of the base element is coated in at least some areas with a functional layer structure. In addition, the invention relates to a method for coating a household appliance component and a household appliance.
    Energy efficiency and the possibility of cleaning are issues that are becoming increasingly important in all household appliances. In particular, the drying capacity is a key factor that consists in the elimination of water present in the domestic appliance due to the condensation of water on different components of the domestic appliance during the use of the domestic appliance. The household appliance components normally comprise a base element, where at least one surface of the base element is coated in at least some areas with a functional layer structure to influence the condensation properties of the household appliance.
    In general, the improvement of condensation properties is sought in order to reduce the temperature, time, and energy necessary for a drying process in household appliances that use water, for example, in dishwashing machines, machines washing machines, and dryers. In dishwashing machines, consumer complaints focus on water stains that form on the dishes after the washing process. In addition, low wettability can impair the possibility of cleaning household appliances such as cooking fields, which are usually made of ceramic hobs. Condensation problems, which are described as "perspiration" by customers, are present, for example, in domestic refrigerators and freezers. This problem is caused by several reasons, such as storing products without a lid. Mainly in the humid areas of a refrigerator, small drops of condensed water can form and drip on food, causing shorter expiration times. The condensation of small drops of water on the surface of components such as linings and interior walls can also affect the performance and energy consumption of a refrigerator or a freezer.
    However, the functional layer structures known at present still show a rather low yield with respect to the avoidance of such problems related to condensation in household appliances.
    The present invention solves the technical problem of providing a household appliance component with better water condensation properties. Another technical problem that the invention solves is to provide a method for coating a household appliance component with a functional layer structure that has better condensation properties. Also, the present invention also solves the technical problem of providing a household appliance comprising at least one household appliance component with better condensation properties.
    These problems are solved by a household appliance component, a method for coating a household appliance component, a domestic appliance, and a use according to the independent claims. Advantageous developments of the invention are specified in the respective dependent claims, wherein the advantageous developments of the household appliance component are to be considered advantageous developments of the household method and apparatus, and vice versa.
    A first aspect of the invention refers to a household appliance component, which comprises a base element, where at least one surface of the base element is coated in at least some areas with a functional layer structure, where the functional layer structure It comprises at least one superhydrophilic layer containing polidopamine. According to the invention, better condensation properties of the household appliance component are achieved by comprising the structure of functional layers at least one superhydrophilic layer that contains or is composed of polidopamine. Polidopamine (PDA) can be produced, for example, by the polymerization of dopamine and, surprisingly, has proved to be an excellent polymer for the formation of superhydrophilic layers. Although the PDA is known as such, its structure continues to be the subject of discussion. In general, it is assumed that the PDA is composed of dihydroxyindole, indoledione, and dopamine units, assuming that they are covalently bound in accordance with the following structure:
    The superhydrophilic layer attracts water, since small drops of water and the like are preferably deposited on the superhydrophilic PDA layer rather than on hydrophobic or less hydrophilic materials such as plastic, metal, or ceramics. The superhydrophilic layer can act as a sink or receiver for water, thereby helping to remove water from other less hydrophilic superticies of the household appliance component. According to the present invention, the term "superhydrophilic" includes the concept of layers having contact angles with water below 25 ° and, preferably, 2 °
    or less. The household appliance component according to the invention has a very high affinity with water to effectively prevent water condensation on uncoated areas, for example, on dishes placed inside a dishwasher. Thus, the structure of functional layers effectively repels hydrophobic components such as oil and food debris, thus simplifying the cleaning process of the different components of the domestic appliance, for example, the glass surface of induction cookers , and the like. On the other hand, hydrophilic components and, in particular, water, are attracted to the superhydrophilic layer, which leads to the achievement of improved condensation properties and, consequently, to the reduction of the temperature necessary for the drying of apparatus. such as dryers, washing machines, and dishwashing machines, as well as reducing the time required for the drying process. Thus, the energy consumption necessary to carry out such a drying process is reduced, for example, in dishwashing machines and in dryers. In general, the superhydrophilic layer may be composed exclusively of PDA, or may comprise one or more additional components. Also, in its simplest configuration, the structure of functional layers is composed exclusively of the superhydrophilic layer. The superstructure of the base element may be only partially coated, that is, in some areas, although it is also possible that the entire surface of the base element is coated. Also, the base element may comprise different layers or layer structures on different surface areas, where at least one of the layers is the PDA superhydrophilic layer.
    In an advantageous development of the invention, it is envisioned that the functional layer structure comprises multiple layers. This makes possible a very precise adjustment of the physical, chemical and mechanical properties of the functional layer structure. Thus, the structure of functional layers may comprise 2, 3, 4, 5, 6, 7 or more individual layers. Generally, the layers may have different compositions. It can also be provided that some or all layers have the same composition. The thickness of the individual layers may be identical or different.
    In another advantageous development of the invention, the superhydrophilic layer containing polidopamine is an upper layer of the functional layer structure. In this way, the structure of functional layers has particularly good condensation characteristics.
    In another advantageous development of the invention, it is envisioned that the functional layer structure comprises at least one other layer comprising at least one organically modified silicate (ormosil). Organically modified silicate coatings show unique properties, being between organic polymers and silica, since they can be resistant against atmospheric conditions such as silica and flexible like polymers, and are not as fragile as silica coatings thanks to their flexibility, and they are very important for the production of durable coatings due to their exceptional mechanical properties. Another characteristic of ormosil coatings is their good adhesion to many different materials, so they can be applied on various surfaces, such as plastic materials (for example, polystyrene or polypropylene), metals, glasses, silicon, paper, cardboard, stones , and wood without an additional binder. Ormosiles can have a very high water repellency and, therefore, effectively prevent water condensation on the coated areas of the base element, for example, on walls of a refrigerator. In addition, the ormosil-containing layer can function as a moisture barrier layer to protect the base element from water that is trapped by the superhydrophilic PDA layer. This improvement of the condensation properties in some areas of a household appliance leads to the reduction of the temperature necessary for drying household appliances such as dryers, washing machines, and dishwashing machines, as well as the reduction of the time required for the process of dried Consequently, the energy consumption necessary to effect such a drying process is reduced, for example, in dishwashing machines and in dryers. Alternatively or additionally, the ormosiles may have a very high affinity with water to effectively prevent water condensation on the uncoated areas, for example, on the dishes placed inside a dishwasher. In this way, the coating effectively repels hydrophobic components such as oil and food debris, thus simplifying the cleaning process of the different components of the household appliance. Generally, the wettability or non-wettability of such coated surfaces is not affected by the underlying substrate material or by the pH of the water. In addition, ormosil coatings are durable and stable, both mechanically and chemically. Ormosil can be expected to be superhydrophobic. Being the ormosil superhydrophobic, the condensation of water on the respective layer can be reduced or even avoided completely. According to the present invention, the term "superhydrophobic" includes the concept of layers having angles of contact with water of at least 1200 and, preferably, of 1400 or more. Alternatively or additionally, ormosil is expected to be superhydrophilic. The superhydrophilic ormosyl can also act as a sink or receiver for water, thus helping the PDA layer to remove water from other less hydrophilic surfaces.
    In another advantageous development of the invention, it is envisioned that the layer containing ormosil is a base layer of the functional layer structure. In other words, it is envisaged that the base element is coated with a layer comprising or consisting of one or more ormosiles. Thanks to the good adhesion of the ormosiles to many different materials, the superhydrophilic PDA layer can be applied to different materials through the base layer containing ormosil, even if the superhydrophilic PDA layer does not adhere well to the respective base material by herself.
    In another advantageous development of the invention, it is envisioned that the household appliance component is configured as a lining or wall element of a domestic appliance. This embodiment allows water contact with such interior and / or exterior walls of surfaces of the domestic appliance to be avoided and / or improved. Alternatively, it is envisaged that the household appliance component is configured as a cooking field plate, in particular as a cooking field plate of at least one induction cooker. In the case of cooking field plates such as induction cookers, ceramic hob cooking plates, and the like, the structure of functional layers on the glass of the induction cooker reduces the adhesion of oil and waste of food, so that the cleaning process of such cooking field plates is simplified, providing them with a property related to easy cleaning. Alternatively or additionally, it is envisioned that the household appliance component is configured as a tray or basket of a dishwasher. In dishwashing machines, customer complaints focus on water stains that form on the dishes after the washing process. The formation of such spots may be mainly related to water hardness. To remove such water stains, coating a tray and / or basket of the dishwasher can help the water droplets adhere to the tray / basket, since these small drops of water are fixed to a greater extent on a tray or basket covered and to a lesser extent on common tableware materials (glass, steel, ceramics, etc.).
    A second aspect of the invention refers to a method for coating a household appliance component, where at least one surface of a base element of the household appliance component is coated in at least some areas with a functional layer structure. According to the invention, the functional layer structure is formed with at least one superhydrophilic layer comprising polidopamine. Polidopamine (PDA) has a very high affinity with water to effectively prevent water condensation on uncoated areas, for example, on dishes placed inside a dishwasher. On the other hand, the superhydrophilic layer effectively repels hydrophobic components such as oil and food debris, thus simplifying the cleaning process of the different components of the household appliance. Likewise, the PDA can be applied directly to many materials that are commonly used for the manufacture of base elements of household appliance components, for example, to plastic materials (for example, polystyrene or polypropylene), metals, glass, silicon, paper, cardboard and stones. Generally, the wettability or non-wettability of such coated surfaces is not affected by the underlying substrate material or by the pH of the water. In addition, PDA-containing coatings are durable and stable, both mechanically and chemically. In general, the base element coating may be composed of one or more PDAs. In addition, the surface of a base element may be coated with a composition comprising PDA together with one or more additional components. The surface of the base element can only be partially coated and, alternatively, the entire surface of the base element can be coated. Also, the base element can be coated with different layer structures on different surface areas, where at least one of the layers comprises or is composed of at least PDA. A variety of optional secondary immobilization reactions in general that make use of the polidopamine layer as a base or "primer layer ~" can lead to the achievement of various functional coatings, including grafted polymer coatings, films of metal, and self-assembled monolayers Other features and their advantages can be drawn from the description of the first aspect of the invention Advantageous embodiments of the first aspect of the invention must
    be considered advantageous embodiments of the second aspect of the invention, and vice versa.
    In an advantageous development of the invention, it is envisioned that the formation of the superhydrophilic layer comprises the polymerization of at least one of the dopamine, a dopamine salt, and a dopamine derivative to the polidopamine. This allows a fast and simple formation of the superhydrophilic layer on many different base materials. The polymerization reaction is preferably an oxidative polymerization.
    In another advantageous development of the invention, polymerization is expected to be carried out under aqueous conditions with a pH value that is adjusted to at least 8.5. A pH value in the alkaline region advantageously accelerates the polymerization of dopamine, dopamine salts, and dopamine derivatives. In general, higher pH values of up to about 11 cause faster reactions.
    In another advantageous development of the invention, it is envisioned that tris (hydroxymethyl) -aminomethane (TRIS) is used as the polymerization activating agent. TRIS accelerates polymerization, and contributes to the preparation of very homogeneous and flat layers.
    In order to improve the adhesion of the superhydrophilic layer of PDA on certain materials of the base element, it is further provided that the supertitle of the base element is pretreated, in particular, activated by plasma, before the superhydrophilic layer is formed.
    Also in order to improve the adhesion of the superhydrophilic PDA layer, in some embodiments of the invention it is envisioned that the base element superstructure be coated with a layer containing at least one organically modified silicate (ormosil) before the superhydrophilic layer is formed. . In other words, it is envisaged that, to produce the structure of functional layers, a base layer containing ormosil is first applied to the base elements, followed by the superhydrophilic PDA layer. Ormosiles can have a very high water repellency, so they effectively protect the base element from moisture. The base layer with ormosil content can be applied by spray coating on the base element. Coatings generated by spray coating have excellent mechanical and chemical properties and can be easily applied to all commonly used base materials and shapes. In addition, spray coating makes it possible for production costs to be low.
    In another advantageous embodiment of the invention, it is envisioned that the ormosil is first mixed with at least one plastic material and / or with at least one solvent, and then the mixture is applied by spray coating on the superstore. The coatings must be mechanically stable and must adhere securely to the base element during the life of the household appliance component. Therefore, the ormosil (s) must be mixed with plastic materials such as granulated polystyrene, which functions as a binder. Alternatively or additionally, the ormosyl (s) must be mixed with one or more solvents such as ethanol, tetrahydrofuran and / or toluene to facilitate the coating of the base element, for example, by spray coating. The ormosil used is expected to be synthesized through a sol-gel process. The sol-gel process is a method to produce solid materials from small molecules, and involves the conversion of monomers into a colloidal solution (sol) that acts as the precursor for an integrated network (or gel) of discrete particles or crosslinked polymers . In this chemical process, the "sor (or solution) gradually evolves towards the formation of a jelly-like diphasic system that contains both a liquid phase and a solid phase, whose morphologies oscillate between discrete particles and networks of continuous polymers. The gels according to The present invention can be produced, for example, using methyltrimethoxysilane (MTMS) and phenyltrimethoxysilane (PTES) for superhydrophobic coatings and / or using tetraethylorthosilicate for superhydrophilic coatings Naturally, different monomers and / or mixtures of monomers can also be used. they can be dissolved in a solvent such as ethanol and hydrolyzed at room temperature with an acid catalyst (for example, oxalic acid) The resulting compounds can then be polymerized using an alkaline catalyst (for example, ammonium hydroxide), thus forming a gel. It can also be expected that the Ormosil gel formed hardens for a predetermined period at a predetermined temperature before coating the surface of the household appliance component. The hardening causes a change in the physical and chemical properties of the ormosil gel. The hardening process can be accelerated or slowed down by physical and / or chemical influences such as temperature and / or pressure, oxygen, inert gas, humidity, light, reduced or increased ultraviolet radiation, and the like. Gels formed with ormosil content can be, for example, hardened at room temperature for 1 to 3 days to improve their mechanical and chemical properties. It can also be provided that ultrasonic vibrations be applied to the ormosil before coating the surface of the household appliance component. Due to the cavitation shear forces due to the application of ultrasonic vibrations, the molecular weight of the ormosil (s) is reduced by reducing the size of the particles, resulting in a polydispersed colloidal solution. The multiphase systems are dispersed and emulsified very efficiently, so that very fine mixtures are prepared. The resulting "sono-ormosil (s)" (s) shows a higher density and better thermal stability compared to the ormosiles that are produced without the application of ultrasonic vibrations.
    In another advantageous development of the invention, it is envisioned that at least one layer of the functional layer structure is brought into contact with an organic solvent. This improves, in some embodiments, the adhesion of the layer (s) on the base element's surface. The layer (s) may, for example, be immersed for several seconds in an organic solvent such as acetone. Alternatively or additionally, the organic solvent may be sprayed on the functional layer or layer structure.
    A third aspect of the invention refers to a household appliance, which comprises at least one household appliance component according to the first aspect of the invention and / or at least one household appliance component that is coated at least in some areas by a method according to the second aspect of the invention. The resulting features and their advantages can be drawn from the description of the first and second aspects of the invention.
    A fourth aspect of the invention refers to the use of polidopamine to form a superhydrophilic layer in at least some areas of a base element of a household appliance component. The resulting characteristics and their advantages can be drawn from the description of the first, the second, and the third aspect of the invention.
    Other features of the invention are drawn from the claims and the following embodiments. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the embodiments, are usable not only in the combination indicated in each case, but also in other combinations without leaving the scope of the invention. Therefore, variations of the invention are also possible that are not explicitly shown and described in the embodiments but which, however, can be formulated through different combinations of features separate from the described embodiments. Variations and combinations of features that do not contain all the features of an independent claim originally formulated are also possible. Next, the embodiments of the invention are described in more detail with reference to the schematic drawings. Here, they show:
    Fig. 1 schematic diagram of a method for coating a household appliance component with a functional layer structure;
    Fig. 2 a schematic sectional view of a first embodiment of a household appliance component with a functional layer structure; Y
    Fig. 3 a schematic sectional view of a second embodiment of a household appliance component with a functional layer structure.
    Figure 1 shows a schematic diagram of a method for coating a household appliance component 1 with a functional layer structure 2, where the layer structure 2 is formed with a superhydrophilic layer 3 comprising polidopamine. To coat the household appliance component 1, a coating solution is prepared by dissolving 24 mg of tris (hydroxymethyl) -aminomethane (TRIS) as the initiator of the basic polymerization in 20 ml of water (stirring or removing). Then, the pH of the solution is adjusted to a value of approximately 8.5 with appropriate amounts of HCI solution (1 M). Higher pH values, such as 10.5, are also possible, as polymerization usually acts faster. Following the pH adjustment, 4 mg of 3-hydroxytyramine hydrochloride (HCI of dopamine) is added to the TRIS solution, and the household appliance component 1 is immersed in the solution for 24 hours in an atmosphere containing oxygen . The household appliance component 1 is composed of a base element 4 made of plastic or glass. The immersion time may be shorter, for example, 1 hour, which also results in the formation of the superhydrophilic layer 3. Then, dopamine undergoes oxidative self-polymerization in the presence of TRIS to form a polidopamine layer (PDA ) 3 adherent on the base element 4. The thickness of the resulting superhydrophilic layer of PDA 3 is approximately 84 nm.
    The superhydrophilic layers of PDA 3 have several advantages. These can provide a biocompatible (nano) coating for surfaces of materials that would otherwise have certain degrees of toxicity. PDA coatings are mechanically and chemically stable, durable, and adhesion resistant. They can also be prepared easily and ensure better condensation properties for different types of household appliances. A variety of secondary immobilization reactions are possible that make use of the PDA layer 3 as a base or "primer layer", which makes various functional coatings possible, including grafted polymer coatings, metal films, and self-assembled monolayers.
    In dishwashing machines, customer complaints focus on water stains that form on the dishes after the washing process. In order to remove these water stains, household appliance components 1 such as polypropylene trays and baskets comprising superhydrophilic layers of PDA 3 can be used.
    5 In this way, small drops of water are formed to a greater extent on the superhydrophilic coating of PDA 3, and to a lesser extent on the less hydrophilic material of the dishes (glass, steel, ceramics, etc.).
    In the case of induction cookers or other cooking field plates, a superhydrophilic layer of PDA 3 on the cover glass of the cooking field plate 10 simplifies the cleaning process.
    If the base element 4 is made of plastic material such as PP, it is advisable to pre-activate its surface to improve the adhesion of the PDA layer 3. The base element 4 can be activated by applying plasma (üz / Nz) for creation of micropores on the surface and thus increase the adhesion of the PDA 3 layer. Table 1 indicates
    15 examples and corresponding process parameters.
    Table 1
    Plasma O2 flow (cm3 / m in)N2 flow (cm3 / min)Pressure (lorr)TOCPower (W)Treatment time (min)
    OR, 100.20302004
    OR, 100.20302002
    N, 50.20301004
    N, 50.20301002
    Additionally or alternatively, it is possible to spray a mixture of toluene: ormosil (1: 1 v / v) on the base element 4 to create a primer layer for the following layer structure 2 (DPA layer 3).
    To prepare the ormosiles, appropriate monomer (s) are diluted in ethanol or methanol and hydrolyzed using oxalic acid as the acid catalyst. In a second step, a condensation reaction is initiated using ammonium hydroxide as the basic catalyst to form ormosyl gels (usually, within 24 hours). After the gels harden (for example, between 2 and 4 days) to strengthen the gel network, the gels can be sonicated to obtain ormosil colloids. If the gels are prepared in methanol, they can be washed with ethanol before sonication in order to exchange the more toxic methanol for the less toxic ethanol. Gels prepared in ethanol can be used directly without exchanging the solvent. The synthesis of ormosiles is described in more detail below. Table 2 shows several appropriate ormosiles.
    Table 2
    Sample SolventPTES volume percentage: MTMS (EYE)
    ME100se 9.74 mi MeOH0: 100
    PhO 9.6 mi EtOH0: 100
    Ph10 9.6 mi EtOH10:90
    Ph15 9.6 mi EtOH15:85
    Ph20 9.6 mi EtOH20:80
    pH25 9.6 mi EtOH25:75
    1. Synthesis of ormosil gels
    Ormosil gels with (nano) cavities that can be used in the context of the present invention are obtained by a sol-gel method. The gels can be formed using methyltrimethoxysilane (MTMS) and phenyltrimethoxysilane (PTES) for superhydrophobic coatings, or using tetraethylorthosilicate for superhydrophilic coatings. The respective monomer (s) is / are dissolved in ethanol (a solvent
    15 for safe use) and hydrolyzed at room temperature with an acid catalyst (oxalic acid). The resulting compounds are then polymerized at room temperature using an alkaline catalyst (ammonium hydroxide), thus forming a gel.
    2. Preparation of ormosil colloids
    Gels formed in this way harden at room temperature for between 1 and 3-20 days. Hardened gels are diluted with ethanol and then disintegrated by sonication using ultrasonic vibrations, which results in a solution
    colloidal Ultrasonic vibrations can be produced by an ultrasound bath or by an ultrasound probe.
    3. Preparation and characterization of coatings
    Organically modified silicate coatings show unique properties, being between organic polymers and silica, since they are resistant against atmospheric conditions such as silicas and flexible as polymers, and are not as fragile as silica coatings thanks to their flexibility , and are ideal for the production of durable coatings thanks to their exceptional mechanical and chemical properties. Another characteristic of ormosil coatings is their good adhesion to many different superticies, so they can be applied on various surfaces, such as plastics, metals, glasses, or wood, without an additional binder. Thus, ormosiles are excellent base layers 5 for the superhydrophilic layers of PDA 3.
    The coatings and the layer structures 2 must in general be mechanically stable to adhere securely to the respective base element. Ormosi gels! which are prepared according to the method described above are mixed with granulated polystyrene and tetrahydrofuran and. They are then applied to a household appliance component 1 by spray coating. The household appliance component 1 may be an inner lining for a refrigerator and comprise a base element made of polystyrene or other suitable plastic material. The coated household appliance component 1 is then immersed in acetone to improve the adhesion of the base layer 5 containing ormosil. Following these steps, several tests are carried out to examine the mechanical and adhesion properties of the base layer 5. 3.1 Examination of the mechanical and adhesion properties of coatings
    • Band rehearsal:
    The adhesion properties are examined by a band. In this test, the band is applied on the surface of the household appliance component with a specific pressure. The properties of the coating are examined after the band has been removed.
    • Scratch test: The resistance of the coating against scratching is tested by a metal stick. The effect of scratching is examined by measuring the angle of contact with water in the area where the stick has been used to scratch the coating.
    • Abrasion test:
    This test is used to determine the resistance of the coating against scanning and pressure. A test device, weighing 120 grams, is wrapped in a wet cloth and moved on the surface of the coating with a predetermined speed and time. After the test, the properties and morphology of the coating are examined.
    • Chemical stability test:
    To test the stability of the coating against aggressive chemicals, various solutions with different concentrations are prepared and applied on the coating. The solutions are designed to mimic the chemical properties of common foods such as vinegar, lemon, milk, etc. In addition, to test the resistance against commonly used cleaning products, compounds such as dish soap, grease solvent, and caustic soda have been used. The angles of contact with water within the areas of the coating that have been subjected to these solutions are measured to determine chemical stability.
    4. Examination of anti-condensation properties
    To examine the anti-condensation property of a superhydrophobic coating, the coated household appliance component 1 is treated with water vapor for a predetermined time (for example, 10 minutes). Then, the amount of water that remains on the coating is measured. In addition, the performance of the coating is determined by measuring the angles of contact with water if small droplets remain.
    Figure 2 shows a schematic sectional view of a first embodiment of the household appliance component 1. The household appliance component 1 comprises a base element 4 made of glass with a functional layer structure 2, where the layer structure 2 It is composed of a single superhydrophilic layer of PDA 3.
    Figure 3 shows a schematic sectional view of a second embodiment of the household appliance component 1. The household appliance component 1 comprises a base element 4 made of polypropylene (PP) with a functional layer structure 2, where the structure of layers 2 is composed of a superhydrophobic layer of ormosil 5 and a superhydrophilic layer of PDA 3. Therefore, the layer of ormosil 5 is the base layer of the layer structure 2, while the layer of PDA 3 is the upper layer .
    s Those skilled in the art will understand that, while the present invention has been set forth with reference to preferred embodiments, various modifications, changes and additions to the previous invention may be made without abandoning the spirit and scope thereof. The values of the parameters used in the claims and in the description to define the process and measurement conditions to characterize the specific properties of the invention are also included within the framework of deviations, for example, as a result of measurement errors, errors of the system, weight errors, DIN tolerances, and the like. list of reference symbols
    Home appliance component Functional layers structure
    PDA superhydrophilic layer
    Base element Ormosil layer
    权利要求:
    Claims (16)
    [1]
    one. Home appliance component (1), which comprises a base element (4), where at least one superstructure of the base element (4) is coated in at least some areas with a functional layer structure (2), characterized in that the structure of functional layers (2) comprises at least one superhydrophilic layer (3) containing polidopamine (PDA).
    [2]
    2. Home appliance component (1) according to claim 1, wherein the structure of functional layers (2) comprises multiple layers (3, 5).
    [3]
    3. Home appliance component (1) according to claim 2, wherein the superhydrophilic layer containing polidopamine (3) is an upper layer of the functional layer structure (2).
    [4]
    Four. Home appliance component (1) according to claim 2 or 3, wherein the structure of functional layers (2) comprises at least one other layer (5) comprising at least one organically modified silicate (ormosyl).
    [5]
    5. Home appliance component (1) according to claim 4, wherein the ormosil-containing layer (5) is a base layer of the functional layer structure (2).
    [6]
    6. Domestic appliance component (1) according to any one of claims 1 to 5, which is configured as a lining or wall element of a domestic appliance, as a cooking field plate, or as a tray or basket of a dishwasher.
    [7]
    7. Method for coating a household appliance component (1), where at least one surface of a base element (4) of the household appliance component (1) is coated in at least some areas with a functional layer structure (2), characterized because the structure of functional layers (2) is formed with at least one superhydrophilic layer (3) comprising polidopamine (PDA).
    [8]
    8. Method according to claim 7, wherein the formation of the superhydrophilic layer (-a) comprises the polymerization of at least one of the dopamine, a dopamine salt, and a dopamine derivative to the polidopamine.
    [9]
    9. Method according to claim 8, wherein the polymerization is carried out under aqueous conditions with a pH value that is adjusted to at least 8.5.
    [10]
    10. Method according to claim 8 or 9, wherein tris (hydroxymethyl) -aminomethane (TRIS) is used as the polymerization activating agent.
    [11 ]
    eleven . A method according to any one of claims 7 to 10, wherein the superstructure of said base element (4) is pretreated, in particular, it is activated by plasma, before forming the superhydrophilic layer (3).
    [12]
    12. A method according to any one of claims 7 to 11, wherein the superstructure of said base element (4) is coated with a layer (5) containing at least one organically modified silicate (ormosil) before the superhydrophilic layer (3) is formed.
    [13]
    13. Method according to claim 12, wherein the ormosil is first mixed with at least one plastic material and / or with at least one solvent, and then, the mixture is applied by spray coating on the surface to form said layer (5).
    [14]
    14. Method according to any of claims 12 or 13, wherein at least one layer (3, 5) of the functional layer structure (2) is contacted with an organic solvent.
    [15]
    fifteen. Domestic appliance, which comprises at least one household appliance component (1) according to any one of claims 1 to 6 and / or at least one household appliance component (1) which is coated in at least some areas by a method according to any of claims 7 to 14.
    [16]
    16. Use of polidopamine (PDA) to form a superhydrophilic layer (3) at least in some areas of a base element (4) of a household appliance component (1).
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    同族专利:
    公开号 | 公开日
    ES2597727B1|2017-12-26|
    EP3324813A1|2018-05-30|
    WO2017013011A1|2017-01-26|
    EP3324813B1|2019-04-17|
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    PCT/EP2016/066893| WO2017013011A1|2015-07-20|2016-07-15|Household appliance component comprising a base element with a functional coating|
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