CN112120542A - Non-stick pan coating with temperature indicating function and preparation method thereof - Google Patents
Non-stick pan coating with temperature indicating function and preparation method thereof Download PDFInfo
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- CN112120542A CN112120542A CN202010943802.1A CN202010943802A CN112120542A CN 112120542 A CN112120542 A CN 112120542A CN 202010943802 A CN202010943802 A CN 202010943802A CN 112120542 A CN112120542 A CN 112120542A
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- 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
- A47J36/025—Vessels with non-stick features, e.g. coatings
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- 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
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- 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
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
- B05D1/005—Spin coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
- C23C14/0036—Reactive sputtering
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/083—Oxides of refractory metals or yttrium
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
- C23C28/042—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a preparation method of a non-stick pan coating with a temperature indicating function, which comprises the following steps: s1: coarsening the metal pot body, forming patterned dents on the inner surface of the pot body, degreasing, and cleaning for later use; s2: sequentially depositing a first thermochromic material and a second thermochromic material in the patterned indentation of the pan body; s3: uniformly mixing the water-based fluororesin prepolymer, the modified inorganic filler, the first modifier and the auxiliary agent to prepare a component A, and uniformly mixing the second modifier, the initiator, the accelerator and the auxiliary agent to prepare a component B; s4: preheating the surface of a pan body, quickly stirring and uniformly mixing the component A and the component B, coating the mixture on the inner surface of the pan body, and quickly quenching after coating to obtain the non-stick pan coating. The non-stick pan coating prepared by the invention has a good temperature prompting effect, is beneficial to mastering of cooking duration, has excellent comprehensive performance and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of non-stick pan coatings, in particular to a non-stick pan coating with a temperature indicating function and a preparation method thereof.
Background
With the increasing improvement of living standard of people, more attention is paid to food safety and diet health. The non-stick pan has the excellent characteristics of easy cleaning, no adhesion of food and the pan body, maximum reduction of oil smoke and the like, and gradually replaces the traditional iron pan, so the non-stick pan is more and more popular with people. According to the different materials of the non-stick pan coating, the non-stick pan coating can be divided into an organic coating and an inorganic coating. The organic coating non-stick pan is mainly made of polytetrafluoroethylene, and the popular kitchen utensil is made of the excellent thermal property, chemical property, easy cleaning property and non-toxic property of the polytetrafluoroethylene.
During cooking, the mastering of the fire of the food materials is related to the appearance of the color, the fragrance, the taste and other aspects of the food materials, most of the existing non-stick pan coatings do not have a temperature prompting function, people often cannot clearly know the temperature condition of the food on the non-stick pan coatings during cooking, the cooking time and the cooking duration are difficult to master, the cooking time is too long, and the taste and the color of the food are poor. Meanwhile, the service life of the polytetrafluoroethylene non-stick pan coating is easily reduced due to the overhigh use temperature.
In view of the above, it is desirable to provide a non-stick pan coating with temperature indicating function, so as to control the degree of cooking time more flexibly and effectively during cooking.
Disclosure of Invention
In view of the defects of the prior art, the invention provides the preparation method of the non-stick pan coating with the temperature indicating function, and the non-stick pan coating obtained by the preparation method solves the problem that the existing non-stick pan coating cannot indicate the temperature or has poor temperature indicating effect, so that the degree of cooking time of food materials can be more flexibly and effectively controlled.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a preparation method of a non-stick pan coating with a temperature indicating function comprises the following steps:
step S1: carrying out sand blasting coarsening treatment on the metal pot body, then carrying out patterning treatment to form a patterned dent on the inner surface of the pot body, then carrying out degreasing treatment, and cleaning for later use;
step S2: sequentially depositing a first thermochromic material and a second thermochromic material in the patterned dents of the pot body by a magnetron sputtering or electrodeposition method;
step S3: weighing 50-80 parts by weight of aqueous fluororesin prepolymer, adding 1-7 parts by weight of modified inorganic filler, 6-12 parts by weight of first modifier and 15-30 parts by weight of auxiliary agent, uniformly stirring and mixing to prepare a component A, and uniformly mixing 10-20 parts by weight of second modifier, 0.1-1 part by weight of initiator, 0.1-0.5 part by weight of accelerator and 15-30 parts by weight of auxiliary agent to prepare a component B;
step S4: preheating the surface of the pot body obtained in the step S2 to 100-300 ℃, rapidly stirring and uniformly mixing the component A and the component B prepared in the step S3, coating the mixture on the inner surface of the pot body in a spin coating mode, and rapidly immersing the mixture into liquid nitrogen for quenching after the coating is finished to obtain the non-stick pot coating with the temperature indicating function.
Preferably, the depth of the patterned dents is 100nm to 2000 nm.
Preferably, the first thermochromic material is vanadium pentoxide and/or tungsten trioxide.
Preparing a first thermochromic material vanadium pentoxide by an electrodeposition method, firstly, preparing a vanadium pentoxide solution with the molar concentration of 2.5-3.5 mol/L; dropwise adding 35wt% of hydrogen peroxide solution, and stopping dropwise adding when the solution gradually changes from yellow to brick red; adding deionized water into the mixed solution according to the volume ratio of the deionized water to the mixed solution of 20:1, and stirring to obtain brick red vanadium pentoxide sol; aging at normal temperature for 7 days, and adding deionized water according to the mass ratio of the deionized water to the V2O5 sol of 30:1 for dilution to obtain a vanadium pentoxide precursor solution; secondly, forming a working pool for electrochemical deposition by taking the metal pot body as a working electrode and taking the Pt sheet as a counter electrode, transferring the vanadium pentoxide precursor solution into the working pool, and performing electrochemical deposition operation by using a direct-current stabilized voltage power supply under the condition of 6-16V to deposit the vanadium pentoxide in the patterned dents of the pot body so as to complete the electrodeposition operation of the first thermochromic material vanadium pentoxide;
preparing a first thermochromic material tungsten trioxide by a magnetron sputtering method: under the condition of room temperature, taking tungsten as a target material, wherein the sputtering gas and the reaction gas are Ar and O2 respectively, the flow rates of O2 and Ar are 12sccm and 12sccm respectively, the working air pressure is 0.2-2 Pa, and the radio frequency power density is 2.5-10W/cm 2; sputtering a layer of tungsten trioxide in the patterned dents of the metal pot body by a magnetron sputtering method, thereby completing the magnetron sputtering operation of the first thermochromic material vanadium pentoxide; the high-performance thermochromic tungsten trioxide thin film can be obtained by the method, the color changing effect is obvious, the response is quick, and the bonding force between the film layer and the pot body is strong;
preferably, the second thermochromic material is chromium oxide.
Preparing a second thermochromic material chromium oxide by a magnetron sputtering method: under the condition of room temperature, chromium is used as a target material, Ar and O2 are respectively used as a sputtering gas and a reaction gas, the flow rates of O2 and Ar are respectively 8sccm and 10sccm, the working pressure is 0.2-2 Pa, and the radio frequency power density is 2.5-10W/cm 2; sputtering a layer of chromium oxide on the basis of the first thermochromic material of the metal pot body by a magnetron sputtering method, thereby completing the magnetron sputtering operation of the second thermochromic material chromium oxide; the color change performance of the thermochromic functional film layer can be integrally improved through the provision of the second thermochromic material, and the temperature resistance is improved;
preferably, the aqueous fluororesin prepolymer is a fluoropolymer with tetrafluoroethylene or vinylidene fluoride as a structural unit, and the average molecular weight of the polymer is 500-5000.
Preferably, the modified inorganic filler is methacrylic acid modified pyrophyllite and/or methacrylic acid modified glass fiber. The pyrophyllite and the glass fiber can be both used as modified inorganic fillers, the color change effect of the material in the dents of the pot body can not be influenced, the wear resistance and the scratch resistance of the pot body coating are improved by the modified pyrophyllite and/or the modified glass fiber of the methacrylic acid, the modified pyrophyllite and the modified glass fiber can be uniformly dispersed in the coating, and the main components in the inorganic material and the coating are subjected to chemical bonds, the stability of the coating is improved, and the influence of the performance reduction of the surface coating on the color change effect of the color change material in the dents is reduced.
Preferably, the first modifier is at least one of 2- (perfluoro-9-methyloctyl) ethyl acrylate, 2-perfluorodecyl ethyl acrylate and 2-perfluorooctyl ethyl acrylate. By selecting the long-chain perfluoro group, the non-stick effect of the coating is improved, the molecular chain branching degree of the fluorine-containing resin is improved, and hydrogen bonds contained in the molecular chain are reduced, so that the fluorine-containing resin obtained by polymerization is an amorphous polymer, the crystallinity of the polymer is reduced, and the prepared coating has higher transparency.
Preferably, the second modifier consists of acrylonitrile and styrene.
Acrylonitrile and styrene are used as modifiers, and on one hand, the acrylonitrile has high hardness and strength, heat resistance and corrosion resistance; the styrene has high surface gloss, easy colorability and easy processability, so that the comprehensive performance of the coating is effectively improved, and meanwhile, acrylonitrile and styrene molecular chains are shorter, and can cooperate with the first modifier to reduce the symmetry of the molecular chains and reduce the stereoregularity of the molecular chains, so that the crystallinity of the coating polymer is further reduced, and the prepared coating has higher transparency.
Preferably, the auxiliary agent is formed by mixing any two of water, methanol and ethanol. The coating formed by the compatibility of the auxiliary agent has the effect of quick drying and improves the construction performance of the coating.
Preferably, the initiator is at least one of ammonium persulfate, potassium persulfate, sodium persulfate, di-tert-butyl peroxide and dicumyl peroxide.
Preferably, the accelerator is at least one of cobalt naphthenate, cobalt isooctanoate and zinc isooctanoate.
The non-stick pan coating with the temperature indicating function is prepared by the preparation method, and the thickness of the coating is 15-25 microns.
In step S4, the invention further reduces the crystallinity of the coating polymer and improves the transparency thereof by quenching the non-stick pan after coating by immersing it in liquid nitrogen. Meanwhile, in order to prevent the coating from cracking in the process of expansion with heat and contraction with cold, the reasonable temperature of the quenching operation is preferably-5 ℃ to-20 ℃, and the coating is applied for 2-3 times.
The invention has the beneficial effects that:
according to the invention, the metal pot body is subjected to patterning treatment and the thermochromic material is deposited, so that the metal pot body has the function effect of temperature prompt, and the dynamic control requirement of people on the fire weather of food materials in the cooking process is met.
The modified tetrafluoroethylene coating disclosed by the invention is strong in binding force with a pot body, has comprehensive excellent performances of no adhesion, easiness in cleaning, heat resistance, scratch resistance and the like, and simultaneously has high film transparency, so that the visibility of the color change effect of the thermochromic material is improved.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
The preparation method of the non-stick pan coating with the temperature indicating function comprises the following steps:
step S1: carrying out sand blasting coarsening treatment on the metal pot body, then carrying out patterning treatment to form a patterned dent on the inner surface of the pot body, then carrying out degreasing treatment, and cleaning for later use; the depth of the patterned indentation was 500 nm.
Step S2: sequentially depositing a first thermochromic material vanadium pentoxide and a second thermochromic material chromium oxide in the patterned dents of the pot body respectively by electrodeposition and magnetron sputtering; wherein the weight ratio of the first thermochromic material to the second thermochromic material is 1: 1. vanadium pentoxide is orange yellow at room temperature, and chromium oxide is in a thermally stable green color at room temperature.
Step S3: weighing 50 parts by weight of aqueous fluororesin prepolymer, adding 2 parts by weight of methacrylic acid modified glass fiber, 6 parts by weight of 2- (perfluoro-9-methyloctyl) ethyl acrylate and 15 parts by weight of auxiliary agent, stirring and mixing uniformly to prepare a component A, and then mixing uniformly 5 parts by weight of acrylonitrile, 10 parts by weight of styrene, 0.3 part by weight of ammonium persulfate, 0.1 part by weight of cobalt iso-octoate, 5 parts by weight of water and 10 parts by weight of ethanol to prepare a component B; the water-based fluororesin prepolymer is a fluorine-containing polymer taking tetrafluoroethylene or vinylidene fluoride as a structural unit, and the average molecular weight of the fluorine-containing polymer is 1200.
Step S4: preheating the surface of the pot body obtained in the step S2 to 200 ℃, rapidly stirring and uniformly mixing the component A and the component B prepared in the step S3, coating the mixture on the inner surface of the pot body in a spin coating mode, and rapidly immersing the mixture into liquid nitrogen for quenching after the coating is finished to obtain the non-stick pot coating with the temperature indicating function. A reasonable temperature for the quenching operation was-10 ℃ and the coating was applied in 2 applications. The coating thickness was 15 um.
The performance of the non-stick pan coating prepared by the preparation method is tested, firstly, after the non-stick pan coating is boiled in water at a high temperature of 100 ℃ for 168 hours, microscopic observation is carried out, and no obvious microcrack appears; secondly, the coating is green at room temperature and turns brown when heated to 200 ℃, and the color change effect is obvious; furthermore, according to GB/T1768-1979, after grinding 200 circles by a grinding wheel under a weight of 250g, the weight loss of the coating is tested to be 0.0073 g; performing a coating adhesion test according to GB9286-1998, wherein the adhesion is 0 grade; the impact resistance test of the coating is carried out according to GB1732-93, and the coating has no cracks and peeling phenomena under the impact of a steel ball with the height of 1m and the weight of 1 kg.
Example 2
The preparation method of the non-stick pan coating with the temperature indicating function comprises the following steps:
step S1: carrying out sand blasting coarsening treatment on the metal pot body, then carrying out patterning treatment to form a patterned dent on the inner surface of the pot body, then carrying out degreasing treatment, and cleaning for later use; the depth of the patterned dents is 100nm to 2000 nm.
Step S2: sequentially depositing a first thermochromic material tungsten trioxide and a second thermochromic material chromium oxide in the patterned dents of the pot body by a magnetron sputtering method; wherein the weight ratio of the first thermochromic material to the second thermochromic material is 1: 1. the tungsten trioxide is light yellow at room temperature, and the chromium oxide is in a thermally stable green color at room temperature.
Step S3: weighing 70 parts by weight of aqueous fluororesin prepolymer, adding 4 parts by weight of methacrylic acid modified pyrophyllite, 8 parts by weight of 2-perfluorodecyl ethyl acrylate and 25 parts by weight of auxiliary agent, uniformly stirring and mixing to prepare a component A, and uniformly mixing 8 parts by weight of acrylonitrile, 7 parts by weight of styrene, 0.5 part by weight of di-tert-butyl peroxide, 0.3 part by weight of cobalt naphthenate, 10 parts by weight of water and 15 parts by weight of methanol to prepare a component B; the water-based fluororesin prepolymer is a fluorine-containing polymer taking tetrafluoroethylene or vinylidene fluoride as a structural unit, and the average molecular weight of the fluorine-containing polymer is 2000.
Step S4: preheating the surface of the pot body obtained in the step S2 to 200 ℃, rapidly stirring and uniformly mixing the component A and the component B prepared in the step S3, coating the mixture on the inner surface of the pot body in a spin coating mode, and rapidly immersing the mixture into liquid nitrogen for quenching after the coating is finished to obtain the non-stick pot coating with the temperature indicating function. A reasonable temperature for the quenching operation was-10 ℃ and the coating was applied in 3 applications. The coating thickness was 20 um.
The performance of the non-stick pan coating prepared by the preparation method is tested, firstly, after the non-stick pan coating is boiled in water at a high temperature of 100 ℃ for 168 hours, microscopic observation is carried out, and no obvious microcrack appears; secondly, the coating is green at room temperature and turns brown when heated to 200 ℃, and the color change effect is obvious; furthermore, according to GB/T1768-1979, after grinding 200 circles by a grinding wheel under a weight of 250g, the weight loss of the coating is tested to be 0.0071 g; performing a coating adhesion test according to GB9286-1998, wherein the adhesion is 0 grade; the impact resistance test of the coating is carried out according to GB1732-93, and the coating has no cracks and peeling phenomena under the impact of a steel ball with the height of 1m and the weight of 1 kg.
Example 3
The preparation method of the non-stick pan coating with the temperature indicating function comprises the following steps:
step S1: carrying out sand blasting coarsening treatment on the metal pot body, then carrying out patterning treatment to form a patterned dent on the inner surface of the pot body, then carrying out degreasing treatment, and cleaning for later use; the depth of the patterned indentation was 2000 nm.
Step S2: sequentially depositing a first thermochromic material vanadium pentoxide and a second thermochromic material chromium oxide in the patterned dents of the pot body respectively by electrodeposition and magnetron sputtering; wherein the weight ratio of the first thermochromic material to the second thermochromic material is 1: 1. vanadium pentoxide is orange yellow at room temperature, and chromium oxide is in a thermally stable green color at room temperature.
Step S3: weighing 80 parts by weight of aqueous fluororesin prepolymer, adding 7 parts by weight of methacrylic acid modified glass fiber, 12 parts by weight of 2-perfluorooctyl ethyl acrylate and 30 parts by weight of auxiliary agent, stirring and mixing uniformly to prepare a component A, and then mixing uniformly 10 parts by weight of acrylonitrile, 10 parts by weight of styrene, 0.7 part by weight of dicumyl peroxide, 0.4 part by weight of zinc isooctanoate, 8 parts by weight of water and 20 parts by weight of ethanol to prepare a component B; the water-based fluororesin prepolymer is a fluorine-containing polymer taking tetrafluoroethylene or vinylidene fluoride as a structural unit, and the average molecular weight of the fluorine-containing polymer is 4000.
Step S4: preheating the surface of the pot body obtained in the step S2 to 300 ℃, rapidly stirring and uniformly mixing the component A and the component B prepared in the step S3, coating the mixture on the inner surface of the pot body in a spin coating mode, and rapidly immersing the mixture into liquid nitrogen for quenching after the coating is finished to obtain the non-stick pot coating with the temperature indicating function. A reasonable temperature for the quenching operation was-10 ℃ and the coating was applied in 3 applications. The coating thickness was 25 um.
The performance of the non-stick pan coating prepared by the preparation method is tested, firstly, after the non-stick pan coating is boiled in water at a high temperature of 100 ℃ for 168 hours, microscopic observation is carried out, and no obvious microcrack appears; secondly, the coating is green at room temperature and turns brown when heated to 200 ℃, and the color change effect is obvious; thirdly, according to GB/T1768-1979, after grinding 200 circles by a grinding wheel under a weight of 250g, the weight loss of the test coating is 0.0067 g; performing a coating adhesion test according to GB9286-1998, wherein the adhesion is 0 grade; the impact resistance test of the coating is carried out according to GB1732-93, and the coating has no cracks and peeling phenomena under the impact of a steel ball with the height of 1m and the weight of 1 kg.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A preparation method of a non-stick pan coating with a temperature indicating function is characterized by comprising the following steps:
step S1: carrying out sand blasting coarsening treatment on the metal pot body, then carrying out patterning treatment to form a patterned dent on the inner surface of the pot body, then carrying out degreasing treatment, and cleaning for later use;
step S2: sequentially depositing a first thermochromic material and a second thermochromic material in the patterned dents of the pot body by a magnetron sputtering or electrodeposition method;
step S3: weighing 50-80 parts by weight of aqueous fluororesin prepolymer, adding 1-7 parts by weight of modified inorganic filler, 6-12 parts by weight of first modifier and 15-30 parts by weight of auxiliary agent, uniformly stirring and mixing to prepare a component A, and uniformly mixing 10-20 parts by weight of second modifier, 0.1-1 part by weight of initiator, 0.1-0.5 part by weight of accelerator and 15-30 parts by weight of auxiliary agent to prepare a component B;
step S4: preheating the surface of the pot body obtained in the step S2 to 100-300 ℃, rapidly stirring and uniformly mixing the component A and the component B prepared in the step S3, coating the mixture on the inner surface of the pot body in a spin coating mode, and rapidly immersing the mixture into liquid nitrogen for quenching after the coating is finished to obtain the non-stick pot coating with the temperature indicating function.
2. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the depth of the patterned indentation is 100nm to 2000 nm.
3. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the first thermochromic material is vanadium pentoxide and/or tungsten trioxide.
4. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the second thermochromic material is chromium oxide.
5. The preparation method of the non-stick pan coating with the temperature indicating function as claimed in claim 1, wherein the aqueous fluororesin prepolymer is a fluoropolymer having tetrafluoroethylene or vinylidene fluoride as a structural unit, and the average molecular weight of the fluoropolymer is 500-5000.
6. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the modified inorganic filler is methacrylic acid modified pyrophyllite and/or methacrylic acid modified glass fiber.
7. The method of claim 1, wherein the first modifier is at least one of 2- (perfluoro-9-methyloctyl) ethyl acrylate, 2-perfluorodecyl ethyl acrylate, and 2-perfluorooctyl ethyl acrylate.
8. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the second modifier is composed of acrylonitrile and styrene.
9. The method for preparing the non-stick pan coating with the temperature indicating function according to claim 1, wherein the auxiliary agent is prepared by mixing any two of water, methanol and ethanol.
10. A non-stick pan coating with temperature indicating function, which is prepared by the preparation method of any one of claims 1 to 9.
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