CN115413922B - Cooker and hot-melt injection preparation method - Google Patents
Cooker and hot-melt injection preparation method Download PDFInfo
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- CN115413922B CN115413922B CN202210968151.0A CN202210968151A CN115413922B CN 115413922 B CN115413922 B CN 115413922B CN 202210968151 A CN202210968151 A CN 202210968151A CN 115413922 B CN115413922 B CN 115413922B
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- coating
- hydrophobic
- cooker
- oleophobic coating
- oleophobic
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- 239000012943 hotmelt Substances 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 title claims abstract description 10
- 239000007924 injection Substances 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 134
- 239000011248 coating agent Substances 0.000 claims abstract description 132
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 83
- 230000005291 magnetic effect Effects 0.000 claims abstract description 73
- 239000010410 layer Substances 0.000 claims abstract description 42
- 239000011241 protective layer Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 86
- 230000005294 ferromagnetic effect Effects 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 32
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 31
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 31
- -1 polytetrafluoroethylene Polymers 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 10
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002086 nanomaterial Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 6
- 239000007921 spray Substances 0.000 claims 6
- 238000005507 spraying Methods 0.000 claims 2
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000007751 thermal spraying Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 235000019198 oils Nutrition 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 241000467686 Eschscholzia lobbii Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
-
- 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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/23—Magnetisable or magnetic paints or lacquers
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
Abstract
The invention discloses a cooker, which comprises a body with a continuous surrounding structure, wherein one side of the bottom of the body facing downwards is provided with a plane structure, the plane structure is covered with a magnetic conduction structure combined with the body, and the magnetic conduction structure sequentially comprises at least one layer of magnetic conduction layer deposited by thermal spraying and a protective layer covering the lowest magnetic conduction layer along the thickness direction of the body; further improved, the body is provided with an opening, the outer surface of the body is uniformly covered with a layer of hydrophobic and oleophobic coating along the edge of the opening, and the hydrophobic and oleophobic coating protrudes out of the outer surface of the body; the invention also discloses a preparation method of the cooker, and the invention utilizes the hot-melt injection to form the magnetic conductive layer which is uniformly combined, thereby improving the structural strength of the cooker and being beneficial to prolonging the service life of the cooker.
Description
Technical Field
The invention relates to the technical field of cookers, in particular to a cooker and a preparation method using hot-melt jetting.
Background
At present, aluminum pans are mostly adopted for frying pans, and the frying pans have the advantages of high heat conduction speed, uniform heating and the like, but cannot be used for electromagnetic heating. In the prior art, one magnetic conduction plate is pressed on the bottom of the pot, but the binding force between the magnetic conduction plate and the bottom of the pot is poor, and after a period of use, the magnetic conduction plate is easy to peel or fall off. In the prior art, an iron coating with magnetic conductivity is gradually sprayed on the outer surface of a pot, when the coating is too thin, the magnetic conductivity is poor, and when the coating is too thick, the surface is rough and easy to crack.
The problem that PTFE is poor in wear resistance in improving anti-sticking performance of a frying pan is that PTFE is sprayed in the frying pan in the using process of the frying pan, and most important reasons for limiting the application of the frying pan in various fields are that because fluorine atoms in a macromolecular chain of PTFE repel each other, attractive force among PTFE molecules is smaller, PTFE molecules slide easily under the action of tangential stress, and the PTFE molecules have low hardness, so that the PTFE molecules are excessively consumed in the friction and wear process.
Disclosure of Invention
The invention aims to provide a cooker, which utilizes hot-melt injection to form a magnetic conduction layer which is uniformly combined, improves the structural strength of the cooker and is beneficial to prolonging the service life of the cooker.
In order to solve the technical problem, the technical scheme of the invention is as follows: a cooker comprises a body with a continuous surrounding structure, wherein one side of the bottom of the body facing downwards is provided with a plane structure, the plane structure is covered with a magnetic conduction structure combined with the body, and the magnetic conduction structure sequentially comprises at least one magnetic conduction layer deposited by thermal fusion and a protective layer covering the lowest magnetic conduction layer along the thickness direction of the body.
Further improved, the body is provided with an opening, the outer surface of the body is uniformly covered with a layer of hydrophobic and oleophobic coating along the edge of the opening, and the hydrophobic and oleophobic coating protrudes out of the outer surface of the body. The invention reduces the water or oil overflow of the cooker during the use process because the water or oil overflows and adheres to the outer surface of the cooker, thereby facilitating the cleaning of the cooker body.
Further improved, the hydrophobic and oleophobic coating and the magnetic conduction structure are arranged at intervals along the body. The invention uses the hydrophobic and oleophobic coating to reduce pollution to the outer surface of the cooker in the using process of the cooker, and simultaneously ensures stable magnetic conduction function.
Preferably, the hydrophobic and oleophobic coating comprises the following substances in percentage by mass:
68% to 81% polytetrafluoroethylene;
8% to 13% of ferromagnetic particles;
4% to 8% of a sheet material;
the microstructure forms 5% to 12% of the particle.
Preferably the ferromagnetic particles are ferroferric oxide; the flaky material is graphene or aluminum oxide. According to the invention, by utilizing the movement of the ferromagnetic particles in the fused polytetrafluoroethylene base material in combination with the attraction of an external magnetic field, on one hand, the movement of the ferromagnetic particles forms the internal stirring of uncured polytetrafluoroethylene of the hydrophobic oleophobic coating, so that bubbles possibly existing in the hot-melt injection process are destroyed, and the compactness of the film layer is improved; meanwhile, the movement of the ferromagnetic particles arranges sheet materials in the film layer, the sheet materials arranged along the external magnetic field direction strengthen the structural connection of polytetrafluoroethylene along the film layer thickness direction, the slippage of PTFE molecules is reduced, the film layer strength is improved, and the service life is prolonged; the flaky material perpendicular to the magnetic field direction moves towards the superficial position of the coating under the pushing of the ferromagnetic particles, so that the microstructure forming particles dispersed in the second coating are gathered towards the superficial position of the hydrophobic and oleophobic coating to form the concave-convex micro-nano structure. The flaky material is graphene material or aluminum oxide, and the distribution mode of the flaky structure is combined, so that the flaky structure effectively improves the compactness of the film layer and the strength of the film layer, and is beneficial to forming the concave-convex structure on the surface of the hydrophobic and oleophobic coating.
It is further preferred that the microstructure-forming particles comprise at least two silica types having different particle sizes. According to the invention, the natural irregular morphology is formed by stacking different particles, so that the coating is guaranteed to have the characteristics of water repellency and oil repellency.
The invention aims to provide a cooker, which utilizes hot-melt jetting to match with an external magnetic field to adjust the arrangement of particles in a formed coating so as to control the formation of a film morphology, thereby facilitating the formation of the cooker.
In order to solve the technical problem, the technical scheme of the invention is as follows: a method for preparing a cooker by hot-melt injection, comprising the following steps:
uniformly coating a first coating taking polytetrafluoroethylene as a base material on the edge of the outer surface of a body provided with a magnetic conduction structure; ferromagnetic particles and flaky materials with micro-nano size are uniformly dispersed in the first base layer;
uniformly coating a second coating on the surface of the first coating of the body, wherein the second coating comprises polytetrafluoroethylene base materials and microstructure forming particles uniformly distributed in the second coating;
applying a directional magnetic field to the body coated with the first coating and the second coating, wherein magnetic force attracts ferromagnetic particles in the first coating to move into the second coating, the first coating and the second coating are combined to form a hydrophobic oleophobic coating, and the surface of the hydrophobic oleophobic coating is provided with a micro-nano structure;
and curing the obtained hydrophobic and oleophobic coating to obtain a target product.
In the preferred step three, the ferromagnetic particles move towards the surface of the hydrophobic and oleophobic coating under the action of an external magnetic field, and the ferromagnetic particles push the sheet-shaped material to form a state parallel to the direction of the magnetic field or perpendicular to the direction of the magnetic field in the moving process;
the ferromagnetic particles push the flaky materials perpendicular to the magnetic field into the second coating and continuously push the micro-structure forming particles with different sizes in the second coating to the surface of the hydrophobic and oleophobic coating to aggregate to form the accumulation of the ferromagnetic particles and the micro-structure forming particles, and the micro-nano structures with micro-nano size concave-convex on the surface of the hydrophobic and oleophobic coating are formed in a matching mode.
According to the invention, the ferromagnetic particles in the first coating are driven by the attraction of an external magnetic field, the ferromagnetic particles move to the surface of the hydrophobic and oleophobic coating along the thickness direction of the hydrophobic and oleophobic coating, and the possibility of bubbles in the film layer is reduced by stirring inside the hydrophobic and oleophobic coating.
Further improved, the stacked extrusion polytetrafluoroethylene part of the ferromagnetic particles and the microstructure forming particles are continuously distributed on the superficial surface of the air facing side of the hydrophobic oleophobic coating, and form continuous package for the ferromagnetic particles and the microstructure forming particles. According to the invention, the ferromagnetic particles are driven to the superficial surface of the hydrophobic and oleophobic coating in an external magnetic field, so that the diversification of the concave-convex structure size of the hydrophobic and oleophobic microstructure is ensured, and as the surface morphology of the hydrophobic and oleophobic coating is formed by internal movement and arrangement and stacking, the surface of the hydrophobic and oleophobic coating is provided with continuous polytetrafluoroethylene which is distributed and covered along the stacking structure of the particles formed by the microstructure and the ferromagnetic particles, and the hydrophobic and oleophobic coating is stable in structure and stable in film structure.
Preferably, the hydrophobic oleophobic coating has a thickness of 50 microns to 100 microns.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention utilizes the hot-melt technology to deposit the magnetic conduction structure layer by layer on the plane structure of the cooker body for heating, and because the magnetic conduction structure is layered and combined with the body layer by layer, the deformation and the stress of the magnetic conduction structure are better released when the cooker is heated, the stability of the whole structure is improved, and the service life of the cooker is prolonged.
Thereby achieving the above object of the present invention.
Drawings
Fig. 1 is a perspective view of a cooker according to the present invention;
fig. 2 is a front view of a cooker according to the present invention;
FIG. 3 is a cross-sectional view of a magnetically permeable structure of a cooker in accordance with the present invention;
FIG. 4 is a cross-sectional view of a hydrophobic oleophobic coating of a cookware in accordance with the present invention;
FIG. 5 is a process flow diagram of a method for preparing cookware by hot melt injection in accordance with the present invention;
the cooker obtained in fig. 6 is a schematic diagram of a heating test.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
Example 1
The embodiment discloses a cooker, as shown in fig. 1 to 3, comprising a body 1 with a continuous surrounding structure, wherein a plane structure 11 is arranged on one side of the bottom of the body 1 facing downwards, the plane structure 11 is covered with a magnetic conduction structure 2 combined with the body 1, and the magnetic conduction structure 2 sequentially comprises at least one layer of a magnetic conduction layer 21 deposited by thermal fusion and a protective layer 22 covering the lowest magnetic conduction layer 21 along the thickness direction of the body 1.
The body 1 is provided with an opening, the outer surface of the body 1 is uniformly covered with a layer of hydrophobic and oleophobic coating 3 along the edge of the opening, and the hydrophobic and oleophobic coating 3 protrudes out of the outer surface of the body 1. The invention reduces the water or oil overflow of the cooker during the use process by using the water and oil repellent coating 3 distributed along the edge of the opening, which is adhered to the outer surface of the cooker, thereby facilitating the cleaning of the cooker body.
In this embodiment, the hydrophobic and oleophobic coating 3 and the magnetic conductive structure 2 are disposed along the body 1 at intervals. According to the invention, the water and oil repellent coating 3 is utilized to reduce the overflow of soup of food to pollute the outer surface of the cooker and flow to the surface of the magnetic conduction structure along the continuous cooker body in the using process of the cooker, so that the stable magnetic conduction function is ensured.
The hydrophobic and oleophobic coating 3 in this embodiment comprises the following substances in mass fraction:
68% of polytetrafluoroethylene;
13% of ferroferric oxide;
8% of graphene;
the microstructure formed 35% of the particles.
According to the invention, by utilizing the movement of the ferromagnetic particles 32 in the substrate of the fused polytetrafluoroethylene 31 in combination with the attraction of an external magnetic field, on one hand, the movement of the ferromagnetic particles 32 forms stirring in the uncured polytetrafluoroethylene 31 in the hydrophobic oleophobic coating 3, so that bubbles possibly existing in the hot-melt injection process are destroyed, and the compactness of the film layer is improved; meanwhile, the movement of the ferromagnetic particles 32 arranges the sheet materials 33 in the membrane layer, the sheet materials 33 arranged along the external magnetic field direction strengthen the structural connection of the polytetrafluoroethylene 31 along the membrane layer thickness direction, the easy slippage among PTFE molecules is reduced, the membrane layer strength is improved, and the service life is prolonged; while the sheet material 33 perpendicular to the magnetic field direction moves toward the shallow surface of the coating layer under the pushing of the ferromagnetic particles 32, and the microstructure-forming particles 35 dispersed in the second coating layer aggregate toward the shallow surface of the hydrophobic oleophobic coating layer 3 to form the concave-convex micro-nano structure 34.
The flaky material 33 is a graphene material or aluminum oxide, and the distribution mode of the flaky structure is combined, so that the flaky structure effectively improves the compactness of the film layer and the strength of the film layer, and is beneficial to forming the concave-convex structure on the surface of the hydrophobic and oleophobic coating 3.
The microstructure-forming particles 35 include at least two kinds of silica having different particle diameters. The mass ratio of the first silica to the second silica was 2:1.
The particle size of the first silica in this example was 500nm and the particle size of the second silica was 50nm; the particle size of the ferroferric oxide is 100 to 300nm; as shown in fig. 4, the invention utilizes the accumulation of different particles to form natural irregular morphology, so as to ensure that the coating has the characteristics of water repellency and oil repellency.
The specific process flow of the hot-melt injection preparation method of the cooker in the embodiment is shown in fig. 5, and the method comprises the following steps:
uniformly coating a first coating with polytetrafluoroethylene 31 as a base material on the edge of the outer surface of the body 1 provided with the magnetic conduction structure 2; ferromagnetic particles 32 and a sheet material 33 having a micro-nano size are uniformly dispersed in the first base layer;
uniformly coating a second coating on the surface of the first coating of the body 1, wherein the second coating comprises a polytetrafluoroethylene 31 base material and microstructure forming particles 35 uniformly distributed in the second coating;
applying a directional magnetic field to the body 1 coated with the first coating and the second coating, wherein the magnetic field strength is 0.5 tesla to 2.5 tesla; the magnetic force attracts the ferromagnetic particles 32 in the first coating to move into the second coating, and the first coating and the second coating combine to form a hydrophobic oleophobic coating 3, wherein the surface of the hydrophobic oleophobic coating 3 is provided with micro-nano structures 34;
and curing the obtained hydrophobic and oleophobic coating 3 to obtain a target product. According to the invention, the ferromagnetic particles 32 are dispersed in the first coating, the microstructure forming particles 35 are dispersed in the second coating, the aggregation of various nano particles is reduced, and the effective moving space of the ferromagnetic particles 32 is fully ensured, so that the sheet-shaped material 33 and the microstructure forming particles 35 are pushed and guided, and the hydrophobic and oleophobic coating 3 is effectively constructed by combining an external magnetic field.
In the preferred step three, the ferromagnetic particles 32 move towards the surface of the hydrophobic and oleophobic coating 3 under the action of an external magnetic field, and the ferromagnetic particles 32 push the sheet-shaped material 33 to form a state parallel to the direction of the magnetic field or perpendicular to the direction of the magnetic field in the moving process;
the ferromagnetic particles 32 push the sheet-like material 33 perpendicular to the magnetic field into the second coating layer and continue pushing the microstructure-forming particles 35 with different sizes in the second coating layer to the surface of the hydrophobic oleophobic coating layer 3 to aggregate to form a stack of the ferromagnetic particles 32 and the microstructure-forming particles 35, and cooperate to form micro-nano structures 34 with micro-nano size concave-convex on the surface of the hydrophobic oleophobic coating layer 3.
The invention utilizes the attraction of an external magnetic field to drive the ferromagnetic particles 32 in the first coating, the ferromagnetic particles 32 move to the surface of the hydrophobic and oleophobic coating 3 along the thickness direction of the hydrophobic and oleophobic coating 3, and the possibility of bubbles in the film layer is reduced by stirring inside the hydrophobic and oleophobic coating 3.
In this embodiment, the stacked extruded polytetrafluoroethylene portions of the ferromagnetic particles 32 and the microstructure-forming particles 35 are continuously distributed on the air-facing surface of the hydrophobic and oleophobic coating 3 and form a continuous encapsulation of the ferromagnetic particles 32 and the microstructure-forming particles 35. The invention utilizes the ferromagnetic particles 32 to drive to the superficial surface of the hydrophobic and oleophobic coating 3 in the external magnetic field to ensure the diversification of the concave-convex structure size of the hydrophobic and oleophobic microstructure, and as the surface morphology of the hydrophobic and oleophobic coating 3 is formed by internal movement, arrangement and stacking, the surface of the hydrophobic and oleophobic coating 3 is provided with continuous polytetrafluoroethylene 31 which is distributed and covered along the stacking structure of the microstructure forming particles 35 and the ferromagnetic particles 32, and the hydrophobic and oleophobic coating 3 has stable structure and stable film structure.
The hydrophobic and oleophobic coating 3 prepared in this example had a thickness of 50 microns.
Example 2
The main difference between this embodiment and embodiment 1 is that:
the hydrophobic and oleophobic coating 3 in this embodiment comprises the following substances in mass fraction:
75% of polytetrafluoroethylene;
ferroferric oxide 8%;
5% of graphene;
the microstructure formed 35% of the particles.
The hydrophobic and oleophobic coating 3 prepared in this example had a thickness of 80 microns.
Example 3
The main difference between this embodiment and embodiment 1 is that:
the hydrophobic and oleophobic coating 3 in this embodiment comprises the following substances in mass fraction:
81% of polytetrafluoroethylene;
10% of ferroferric oxide;
4% of alumina;
the microstructure formed 35% of the particles.
The hydrophobic and oleophobic coating 3 prepared in this example had a thickness of 100 microns.
Example 4
The main difference between this embodiment and embodiment 1 is that:
the hydrophobic and oleophobic coating 3 in this embodiment comprises the following substances in mass fraction:
75% of polytetrafluoroethylene;
11% of ferroferric oxide;
alumina 6%;
the microstructure formed 35% of the particles.
The hydrophobic and oleophobic coating 3 prepared in this example had a thickness of 80 microns.
Example 5
The main difference between this embodiment and embodiment 1 is that:
the hydrophobic and oleophobic coating 3 in this embodiment comprises the following substances in mass fraction:
78% of polytetrafluoroethylene;
ferroferric oxide 8%;
8% of graphene;
the microstructure formed 35% of the particles.
The hydrophobic and oleophobic coating 3 prepared in this example had a thickness of 80 microns.
The hydrophobic and oleophobic coatings 3 obtained in examples 1 to 5 were subjected to contact angle tests of water and peanut oil, as detailed in table 1.
Table 1 contact angle test of the hydrophobic oleophobic coatings obtained in examples 1 to 5
As can be seen from Table 1, the hydrophobic and oleophobic coating 3 of the cooker has obvious hydrophobic and oleophobic effects, can reduce or avoid continuous aggregation of dirt such as cooker edge oil when the cooker is used, and is convenient for cleaning the cooker body. In the invention, the hydrophobic and oleophobic coating 3 with a certain thickness is arranged at intervals with the magnetic conduction structure 2, so that water and oil on the surface of the hydrophobic and oleophobic coating 3 cannot infiltrate and roll off, and further flow to the magnetic conduction structure 2 is avoided.
As shown in fig. 6, the heating test at the fixed center heating temperature of the cookware of examples 1 to 5 and the cookware surface (aluminum base material and example) without the hydrophobic and oleophobic coating 3 was performed, and as can be seen from table 2, when the electromagnetic heating temperature was about 200 ℃ at the a position of the magnetic conductive structure 2 at the bottom of the cookware, the heating temperature of the cookware at which the hydrophobic and oleophobic coating 3 was tested was C temperature and the temperature of the cookware between the magnetic conductive structure 2 and the hydrophobic and oleophobic coating 3 was tested B temperature, and the test points are shown in conjunction with fig. 5, and the specific data are shown in table 2.
Table 2 comparison of temperature differences of cookers obtained in examples 1 to 5 and comparative example
The composition and thickness of the hydrophobic and oleophobic coating 3 obtained in the embodiment 1 to 5 and the temperature difference in different areas of the cooker are combined, so that the hydrophobic and oleophobic coating 3 can improve the uniformity of the temperature of the whole structure of the cooker, and further, the hydrophobic and oleophobic coating 3 blocks the heat exchange between the cooker body and the environment in the area, so that the uniformity of the temperature of the cooker is improved; as can be seen from comparative examples 1, 2, 5 and examples 3 and 4, when the sheet material 33 is graphene, the graphene has good heat conducting capability, and the graphene which is close to the vertical arrangement promotes the uniform transfer of heat in the pot body, which is beneficial to improving the uniformity of the overall heating of the pot body and improving the cooking performance of the pot.
The invention utilizes the hot-melt technology to deposit the magnetic conduction structure 2 layer by layer on the plane structure 11 of the cooker body 1 for heating, and because the magnetic conduction structure 2 is layered and combined with the body 1 layer by layer, the deformation and the stress of the magnetic conduction structure 2 are better released when the cooker is heated, the stability of the whole structure is improved, and the service life of the cooker is prolonged. Further matching with the uniformity of the integral heating of the cooker, the deformation of the integral structure of the cooker is synchronous, which is beneficial to prolonging the service life of the cooker.
Claims (7)
1. The heat-spraying preparation method of the cooker is characterized in that the cooker comprises a body with a continuous surrounding structure, wherein one side of the bottom of the body facing downwards is provided with a plane structure, the plane structure is covered with a magnetic conduction structure combined with the body, and the magnetic conduction structure sequentially comprises at least one layer of magnetic conduction layer deposited by heat-spraying and a protective layer covering the lowest magnetic conduction layer along the thickness direction of the body;
the body is provided with an opening, the outer surface of the body is uniformly covered with a layer of hydrophobic and oleophobic coating along the edge of the opening, and the hydrophobic and oleophobic coating protrudes out of the outer surface of the body;
the preparation method of the cooker by hot-melt injection comprises the following steps:
uniformly coating a first coating taking polytetrafluoroethylene as a base material on the edge of the outer surface of a body provided with a magnetic conduction structure; ferromagnetic particles and flaky materials with micro-nano size are uniformly dispersed in the first base layer;
uniformly coating a second coating on the surface of the first coating of the body, wherein the second coating comprises a polytetrafluoroethylene substrate and microstructure forming particles uniformly distributed in the second coating, and the microstructure forming particles comprise at least two types of silicon dioxide with different particle diameters;
applying a directional magnetic field to the body coated with the first coating and the second coating, wherein magnetic force attracts ferromagnetic particles in the first coating to move into the second coating, the first coating and the second coating are combined to form a hydrophobic oleophobic coating, and the surface of the hydrophobic oleophobic coating is provided with a micro-nano structure;
and curing the obtained hydrophobic and oleophobic coating to obtain a target product.
2. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein: the hydrophobic and oleophobic coating and the magnetic conduction structure are arranged at intervals along the body.
3. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein: the hydrophobic and oleophobic coating comprises the following substances in percentage by mass:
68% to 81% polytetrafluoroethylene;
8% to 13% of ferromagnetic particles;
4% to 8% of a sheet material;
the microstructure forms 5% to 12% of the particle.
4. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein: the ferromagnetic particles are ferroferric oxide; the flaky material is graphene or aluminum oxide.
5. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein:
in the third step, ferromagnetic particles move towards the surface of the hydrophobic and oleophobic coating under the action of an external magnetic field, and the ferromagnetic particles push the sheet-shaped material to form a state parallel to the direction of the magnetic field or perpendicular to the direction of the magnetic field in the moving process;
the ferromagnetic particles push the flaky materials perpendicular to the magnetic field into the second coating and continuously push the micro-structure forming particles with different sizes in the second coating to the surface of the hydrophobic and oleophobic coating to aggregate to form the accumulation of the ferromagnetic particles and the micro-structure forming particles, and the micro-nano structures with micro-nano size concave-convex on the surface of the hydrophobic and oleophobic coating are formed in a matching mode.
6. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein: the stacked extrusion poly part of tetrafluoroethylene of the ferromagnetic particles and the particles formed by the microstructure is continuously distributed on the surface of the side of the hydrophobic and oleophobic coating facing the air, and forms continuous package for the ferromagnetic particles and the particles formed by the microstructure.
7. A method of making a heat-fusible spray of cookware as claimed in claim 1, wherein: the hydrophobic oleophobic coating thickness is 50 microns to 100 microns.
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