CN112426046A

CN112426046A - Heat conduction new material non-stick pan with annular concave-convex texture at bottom

Info

Publication number: CN112426046A
Application number: CN202011180945.8A
Authority: CN
Inventors: 殷林根
Original assignee: Suzhou Jiayi Stainless Steel Products Co ltd
Current assignee: Suzhou Jiayi Stainless Steel Products Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-03-02
Anticipated expiration: 2040-10-29
Also published as: CN112426046B

Abstract

The invention discloses a non-stick pan made of a heat-conducting new material and provided with annular concave-convex textures at the bottom, and relates to the technical field of non-stick pans. The non-stick pan comprises: the base body is made of aluminum alloy or stainless steel, and a plurality of bulges which are uniformly distributed in a ring shape are arranged on the inner surface of the base body; the inner surface of the bottom of the pot body is provided with a plurality of grooves which are uniformly distributed in a ring shape; the bulges are semi-spherical. The novel heat-conducting material non-stick pan with the annular concave-convex texture at the bottom has the advantages of excellent high-temperature resistance and wear resistance, high hardness, good non-stick property, strong coating binding force, difficult shedding in the using process and effective prolonging of the service life of the non-stick pan; the used materials are nontoxic and environment-friendly.

Description

Heat conduction new material non-stick pan with annular concave-convex texture at bottom

Technical Field

The invention belongs to the technical field of non-stick pans, and particularly relates to a novel heat-conducting material non-stick pan with an annular concave-convex texture at the bottom.

Background

The non-stick pan is popular with consumers, and is a favorite in the current cooking utensils due to beautiful and novel appearance, easy cleaning and convenient use. The appearance of the non-stick pan brings great convenience to the life of people, people do not need to worry about burning the fish when cooking the meat, and the fish slices stick to the wall of the pan when frying the fish. With the increasing living standard of people, people put forward higher performance requirements on the non-stick pan serving as a kitchen utensil, and the kitchen utensil which is safer, healthier, energy-saving, green and environment-friendly is widely concerned by consumers. The existing non-stick pan material does not have non-stick performance, and the non-stick effect can be achieved only by performing special treatment on the surface after the pan material is formed.

At present, a non-stick coating is generally sprayed on the surface of a pot body to realize the non-stick function, but the non-stick coating is not wear-resistant and is easy to fall off. Because the roughness of the surface of the pot body is low, the non-stick coating attached to the surface of the pot body is easily scratched and scraped by a slice or hard food, so that the service life of the non-stick coating is short, the non-stick performance of the pot is slowly poor, even the non-stick performance is lost, and the health problem of diet of people can be caused. Therefore, the non-stick pan body and the coating thereon are particularly critical in the selection and preparation of raw materials, how to solve the problems of low service life of the non-stick pan body, better adaptation with the coating, scratch resistance of the coating, health and environmental protection and the like, and become the direction for technical personnel in related industries to improve continuously.

Disclosure of Invention

The invention aims to provide a novel heat-conducting material non-stick pan with annular concave-convex textures at the bottom, which has excellent high-temperature resistance and wear resistance, high hardness, good non-stick property, strong coating binding force, difficult shedding in the use process and effectively prolonged service life.

The technical scheme adopted by the invention for realizing the purpose is as follows:

a preparation method of a non-stick coating for a non-stick pan comprises the following steps:

pigment grinding, mixing and grinding titanium dioxide, feldspar powder and serpentine powder;

preparing a coating, namely adding octavinyl cage-type silsesquioxane, distyrylphenol polyoxyethylene ether, methyl triacetoxysilane and an auxiliary agent into the ground pigment, and mixing and stirring to obtain a coating A;

and (4) thermal spraying, namely spraying the coating A on the surface of the base material subjected to sand blasting treatment to obtain a non-stick coating. Performing in-situ copolymerization crosslinking reaction on the surface of a base material by thermal spraying, forming a flat and compact network structure by utilizing a nano three-dimensional structure of cage-type silsesquioxane, and adding titanium dioxide, feldspar powder and serpentine powder to make the roughness degree to prepare an organic/inorganic hybrid coating, wherein the feldspar powder and the serpentine powder form a special micro-nano structure on the surface of the material, so that the roughness degree of the surface of the coating is improved, and the hydrophobic property of the coating is improved; the hardness and the friction and wear resistance of the material can be enhanced when the material enters the network structure; the diffusion distance of corrosive elements such as oxygen molecules, water molecules, organic solvents and the like in the coating is increased, and the corrosion resistance is improved; and can enhance the thermal stability and heat resistance thereof.

Preferably, the raw material components of the non-stick coating comprise, by weight, 22-32 parts of octavinyl polyhedral oligomeric silsesquioxane, 80-100 parts of distyrylphenol polyoxyethylene ether, 2-4 parts of methyltriacetoxysilane, 14-18 parts of titanium dioxide, 16-20 parts of feldspar powder, 6-9 parts of serpentine powder and 4-7 parts of an auxiliary agent.

Preferably, the auxiliary agent comprises 50% of silica sol, 15% of leveling agent and 35% of dispersing agent by mass percentage.

Preferably, the raw material components of the non-stick coating further comprise: 1-3 parts by weight of a composite additive; the composite additive is prepared from the following components in a mass ratio of 2-3: 1.3-1.8: 1.8-3.2 of mercaptopropyltrimethoxysilane, chloropropyltriethoxysilane and 3- [ [2- (biotinimido) ethyl ] dithio ] propionic acid sulfo-group succinimide ester. The mercaptopropyl trimethoxy silane, chloropropyl triethoxy silicon and 3- [ [2- (biotinimide) ethyl ] dithio ] propionic acid sulfo-group succinimide ester have synergistic effect, can be compounded with a polymer, enhance the stability of the structure, further improve the high temperature resistance and enhance the binding capacity of a coating and a base material.

Preferably, the water contact angle of the non-stick coating is greater than or equal to 150 deg.

A new heat conductive material for a non-stick pan, comprising:

a base material, wherein the base material is aluminum alloy or stainless steel;

a plasma layer coated on the base material;

and the non-stick coating is coated on the plasma layer.

Preferably, the plasma layer material comprises MCrALY, feldspar powder and serpentine powder, and the particle size is 64-76 μm; the spraying current of the plasma layer is 400-800A, the voltage is 25-45V, the powder feeding amount is 50-80 g/min, the spraying distance is 10-20 mm, and the spraying time is 90-120 s. The feldspar powder and the serpentine powder are added into the plasma layer, so that the hardness of the base material is improved, the heat conducting performance can be effectively improved, the mechanical property of the material is improved, the binding force of the plasma layer and the non-stick coating is further improved, the coating is better coated on the surface of the pot body and is not easy to fall off, and the service life of the pot is prolonged.

Preferably, the thickness of the plasma layer 2 is 36-44 μm, and the roughness ranges from: ra is 10-13 μm, Rz is 56-64 μm; the thickness of the non-stick coating is 22-28 mu m.

Preferably, the plasma sheath comprises an MCrALY layer and a buffer layer; the buffer layer comprises 43-52% of MCrALY and 48-57% of feldspar powder and serpentine powder mixture.

Preferably, the mass ratio of the feldspar powder to the serpentine powder in the mixture of the feldspar powder and the serpentine powder is 1-1.5: 1

Preferably, the coating method of the non-stick coating is thermal spraying, and the operating temperature of the thermal spraying process is 150-250 ℃.

A new heat-conducting material non-stick pan with annular concave-convex textures at the bottom comprises: the pot body is made of the novel heat-conducting material.

Preferably, the inner surface of the bottom of the pot body is provided with a plurality of bulges which are uniformly distributed in a ring shape; the inner surface of the bottom of the pot body is provided with a plurality of grooves which are uniformly distributed in a ring shape; the bulges are semi-spherical.

Preferably, the height of the annular bulge is 0.2-0.4 mm, and the width of the annular bulge is 0.4-0.8 mm; the depth of the depressed area is 0.2-0.4 mm.

The preparation method of the novel heat-conducting material non-stick pan with the annular concave-convex texture at the bottom comprises the following steps:

(1) spraying and etching on the surface of the sheet of the pot body to form concave-convex grains: printing ink patterns on the inner surface and drying the inner surface to enable the ink patterns to be combined on the pan body sheet; spraying and etching the side of the pan body sheet printed with the ink pattern by an etching machine to form concave-convex grains, cleaning the ink on the surface, and then forming to prepare a pan body;

(2) coating a plasma layer, namely heating powdered MCrALY particles to a molten or semi-molten state by using a plasma arc driven by direct current as a heat source, spraying the powdered MCrALY particles to the surface of a pot body at a speed of 150m/s, and spraying 56-60 s to form a firmly-adhered MCrALY layer on the surface of the pot body; then heating a buffer layer component (the buffer layer component comprises 43-52 wt% of powdered MCrALY particles and 48-57 wt% of mixture of feldspar powder and serpentine powder (the mass ratio of the MCrALY particles to the feldspar powder to the serpentine powder is 1:1)) to a molten or semi-molten state, spraying the mixture to the surface of a pot body at a speed of 150m/s, and spraying 40-44 s to form a buffer layer attached outside the MCrALY layer;

(3) coating a non-stick coating, namely coating a layer of non-stick coating on the surface of the plasma coating by adopting a thermal spraying method; and then the inner surface of the pan body is polished to remove the plasma layer and the non-stick coating of the convex surface of the concave-convex grain region and keep the concave surface.

Compared with the prior art, the invention has the following beneficial effects:

by thermal spraying, a non-stick coating is coated on the surface of a base material, and a special micro-nano structure is formed on the surface of the material due to the existence of feldspar powder and serpentine powder, so that the roughness of the surface of the coating is improved, and the hydrophobic property of the coating is improved; the hardness, the friction and wear resistance and the corrosion resistance of the material can be enhanced when the material enters the network structure; and has certain promotion effect on the thermal stability and heat resistance of the coating. The mercaptopropyl trimethoxy silane, chloropropyl triethoxy silicon and 3- [ [2- (biotinimide) ethyl ] dithio ] propionic acid sulfonic group succinimide ester are added, and the three components have synergistic effect, so that the structure is more stable, the high temperature resistance is further improved, and the mechanical property and the binding capacity with a base material are enhanced. In addition, the plasma layer is added between the substrate and the non-stick coating, and feldspar powder and serpentine powder are added into the plasma layer material, so that the hardness of the substrate material is improved, the heat conduction performance can be effectively improved, the binding force of the plasma layer and the non-stick coating is further improved, the coating is better coated on the surface of the pot body, the coating is not easy to fall off, and the service life of the pot is prolonged.

Therefore, the novel heat-conducting material non-stick pan with the annular concave-convex texture at the bottom is provided, and the non-stick pan has the advantages of excellent high-temperature resistance and wear resistance, high hardness, good non-stick property, strong coating binding force, difficulty in falling off in the using process and capability of effectively prolonging the service life of the non-stick pan.

Drawings

FIG. 1 is a schematic view of the structure of the new material of the present invention;

FIG. 2 is a graph showing the comparison of the results of the non-tackiness test in test example 1 of the present invention;

FIG. 3 is a graph showing a comparison of hardness test results in test example 1 of the present invention;

FIG. 4 is a comparison of the results of the binding performance test in test example 1 of the present invention;

FIG. 5 is a comparison of the results of the heat resistance test in test example 1 of the present invention;

FIG. 6 is a comparative graph showing the results of the corrosion resistance test in test example 1 of the present invention;

FIG. 7 is a schematic representation of the texture of the inner surface of the non-stick pan made in accordance with example 7 of the present invention.

Reference numerals:

1-substrate, 2-plasma layer, 2.1-MCrALY layer, 2.2-buffer layer and 3-non-stick coating.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:

example 1:

grinding the pigment, namely placing 16 parts of titanium dioxide, 20 parts of feldspar powder and 7 parts of serpentine powder in a high-speed ball mill for mixing and grinding according to the parts by weight;

preparing a coating, namely adding 28 parts of octavinyl cage-type silsesquioxane, 96 parts of distyrylphenol polyoxyethylene ether, 4 parts of methyltriacetoxysilane and 6 parts of an auxiliary agent into the ground pigment in parts by weight, and mixing and stirring to obtain a coating A; wherein the auxiliary agent comprises 50% of silica sol, 15% of flatting agent and 35% of dispersing agent by mass fraction.

And (3) thermal spraying, namely performing thermal spraying on the surface of the base material subjected to sand blasting treatment by using the coating A to obtain a non-stick coating, wherein the operating temperature of the thermal spraying process is 220 ℃, and the thickness of the obtained non-stick coating is 22 mu m. Wherein the matrix pretreatment comprises the following steps: cleaning with kerosene ultrasonic wave after sanding with abrasive paper, and removing grease, dirt, aluminum scraps and the like adhered to the surface of the matrix by using an ultrasonic cavitation effect; then respectively cleaning with clear water and alcohol, and wiping with clean filter paper to remove moisture; then a sand blasting machine is adopted for sand blasting treatment, after the sand blasting treatment is finished, compressed air is used for blowing off sand grains and sundries on the surface of the sand blasting machine, and finally alcohol is used for wiping and cleaning. Sand blasting equipment: CS-600D type, 24# brown corundum sand; setting parameters: the pressure is 0.4MPa, and the sand blasting angle is 90 degrees. The surface roughness of the substrate after the sand blasting was completed was 5.0. mu.m.

Example 2:

the preparation of a non-stick coating for non-stick cookware is different from the preparation of the non-stick coating in the embodiment 1: according to parts by weight, 24 parts of octavinyl polyhedral oligomeric silsesquioxane, 88 parts of distyrylphenol polyoxyethylene ether, 2 parts of methyl triacetoxysilane, 14 parts of titanium dioxide, 16 parts of feldspar powder, 6 parts of serpentine powder and 4 parts of auxiliary agent. Wherein the auxiliary agent comprises 50% of silica sol, 15% of flatting agent and 35% of dispersing agent by mass; the thickness of the non-stick coating obtained was 23 μm.

Example 3:

the preparation of a non-stick coating for non-stick cookware is different from the preparation of the non-stick coating in the embodiment 1: the paint comprises, by weight, 32 parts of octavinyl polyhedral oligomeric silsesquioxane, 100 parts of distyrylphenol polyoxyethylene ether, 4 parts of methyl triacetoxysilane, 15 parts of titanium dioxide, 18 parts of feldspar powder, 7 parts of serpentine powder and 5 parts of an auxiliary agent. Wherein the auxiliary agent comprises 50% of silica sol, 15% of flatting agent and 35% of dispersing agent by mass; the thickness of the non-stick coating was 25 μm.

Example 4:

the preparation of a non-stick coating for non-stick cookware is different from the preparation of the non-stick coating in the embodiment 1: the raw material components also comprise 2 parts by weight of composite additive; wherein, the mass ratio of the mercaptopropyltrimethoxysilane, the chloropropyltriethoxysilane and the 3- [ [2- (biotinimide) ethyl ] disulfide ] propionic acid sulfo-group succinimide ester is 3: 1.5: 2.7.

example 5:

the preparation method of the novel heat-conducting material for the non-stick pan comprises the following steps:

the pretreatment of the aluminum alloy base body 1 is the same as the pretreatment of the surface of the base material in example 1;

coating the plasma layer 2, namely heating powdered MCrALY particles to a molten or semi-molten state by using a plasma arc driven by direct current as a heat source, spraying the powdered MCrALY particles to the surface of the pot body at the speed of 150m/s for 57s, and forming a firmly attached MCrALY layer 2.1 on the surface of the pot body; then, the buffer layer component (the buffer layer component comprises 45 wt% of MCrALY particles in powder form and 55 wt% of mixture of feldspar powder and serpentine powder (the mass ratio of the MCrALY particles to the feldspar powder is 1:1)) is heated to a molten or semi-molten state, and is sprayed to the surface of the pot body at the speed of 150m/s, 43s is sprayed to form a buffer layer 2.2 attached to the outside of the MCrALY layer, the thickness of the plasma layer is 40 mu m, and the roughness range is as follows: ra 12 μm, Rz 60 μm. Wherein the spraying current of the plasma layer 2 is 600A, the voltage is 30V, the powder feeding amount is 60g/min, the spraying distance is 16mm, and the total spraying time is 100 s.

Coating a non-stick coating 3, namely thermally spraying the non-stick coating 3 prepared in the example 1 on a plasma layer 2, wherein the operation temperature is 200 ℃, and the layer thickness is 24 mu m; obtaining the new heat-conducting material.

Example 6:

the preparation of a new heat-conducting material for non-stick pan differs from that of example 6 in that: the non-stick coating 3 was prepared using example 4.

Example 7:

(2) coating a plasma layer, namely heating powdered MCrALY particles to a molten or semi-molten state by using a plasma arc driven by direct current as a heat source, spraying the powdered MCrALY particles to the surface of a pot body at the speed of 150m/s, and spraying 56s to form a firmly-adhered MCrALY layer on the surface of the pot body; then heating a buffer layer component (the buffer layer component comprises 47 wt% of MCrALY particles in powder form and 53 wt% of mixture of feldspar powder and serpentine powder (the mass ratio of the MCrALY particles to the feldspar powder is 1:1)) to a molten or semi-molten state, spraying the mixture onto the surface of the pot body at a speed of 150m/s, and spraying 44s to form a buffer layer attached outside the MCrALY layer; wherein the thickness of the obtained plasma layer is 42 μm, and the roughness range is as follows: ra is 11 μm, and Rz is 58 μm. Wherein the spraying current of the plasma layer is 600A, the voltage is 30V, the powder feeding amount is 60g/min, the spraying distance is 16mm, and the total spraying time is 100 s.

(3) Coating a non-stick coating, namely coating a layer of non-stick coating on the surface of the plasma coating by adopting a thermal spraying method, wherein the thickness of the non-stick coating is 26 mu m; and then polishing the inner surface of the pan body to remove the plasma layer and the non-stick coating of the convex surface of the concave-convex grain region and keep the concave surface, thus obtaining the non-stick pan.

The obtained non-stick pan bottom texture real object photo is shown in FIG. 7, the height of the annular bulge is 0.3mm, and the width is 0.5 mm; the depth of the depressed area is 0.3 mm.

Comparative example 1:

the preparation of a non-stick coating for non-stick cookware is different from the preparation of the non-stick coating in the embodiment 1: no pigment was added.

Comparative example 2:

the preparation of a non-stick coating for non-stick cookware is different from the preparation of the non-stick coating in the embodiment 1: only one titanium dioxide is added to the pigment.

Comparative example 3:

the preparation of the novel heat-conducting material for the non-stick pan is different from that of the embodiment 5 in that: the plasma layer 2.2 is not added with feldspar powder and serpentine powder.

Test example 1:

testing of coating Properties

1. Surface wetting (non-stick) test

The hydrophobic (non-stick) properties of the coating are characterized by the magnitude of the static contact angle of the surface of the coating with water. The method comprises the steps of measuring a static contact angle of a coating and water by using a pendant drop method of an OCA40Micro contact angle tester, placing a sample on a sample table, adjusting the focal length after a drop to be measured is pendant-dropped on the surface of the sample, automatically capturing an image by a system, and automatically measuring the size of the contact angle of the surface of the coating after analysis.

The results of the above tests on comparative examples 1 to 2 and examples 1 to 4 are shown in FIG. 2. Analysis in the figure shows that the water contact angle of the coating prepared in example 1 is 163.4 degrees, which is obviously higher than that of comparative example 1 and comparative example 2, and slightly better than that of examples 2-3, and the addition of feldspar powder and serpentine powder and titanium dioxide have a synergistic effect, so that the hydrophobicity of the coating is effectively improved, and the non-adhesiveness of the coating is enhanced. And the effect of example 4 is better than that of example 1, which shows that the addition of the composite additive further improves the non-stickiness of the material.

2. Measurement of hardness

The hardness values of the samples were characterized by a Vickers microhardness tester (model MH-5D) with a load of 100g and a time of 15s, and 7 measurements of each sample at different positions were averaged to obtain the final result. The adopted measuring method is a static indentation method, and the working principle is as follows: applying force to the coating through the diamond cone to enable the measured coating to generate plastic deformation to generate indentation, and then calculating the hardness value according to the relation between the load and the indentation area.

The results of the above tests on the coatings obtained in comparative examples 1 to 2 and examples 1 to 3 are shown in FIG. 3. The microhardness of the coating obtained in example 1 was 783HV_0.1The hardness of the coating material is obviously higher than that of the comparative example 1 and the comparative example 2 and is slightly better than that of the examples 2-3, and the addition of the feldspar powder and the serpentine powder and the titanium dioxide have a synergistic effect, so that the hardness of the coating material is effectively improved.

3. Measurement of coating bond strength

The bonding strength of the coating is the force required by peeling the coating from the bonding surface of the base material in unit area, and the bonding sample tensile method is widely applied to measuring the bonding force of the sprayed coating as a quantitative detection means. The test uses tensile measurements of the bond strength of the coating. The diameters of the sample and the mating part are both 25.4mm, the sample and the sandblasted mating part are fixed on a clamp by taking FM 1000 film resin adhesive as a binder, the sample and the sandblasted mating part are placed in an oven and are subjected to heat preservation for 3h at 180 ℃, a tensile sample is obtained after cooling, a universal tensile tester (GDL-50KN) is used for carrying out tensile test, the ratio of the load to the cross-sectional area of the sample when the sample is broken is the bonding strength value of the coating, and the average value is calculated after measuring a plurality of samples.

The results of the above tests on the coatings obtained in comparative examples 1 to 2 and examples 1 to 4 are shown in FIG. 4. Analysis shows that the bonding strength of the coating prepared in the example 1 is 80MPa, is obviously higher than that of the comparative example 1 and the comparative example 2, and is slightly better than that of the examples 2-3, and the bonding strength of the coating material is effectively improved due to the synergistic effect of the feldspar powder and the serpentine powder and the titanium dioxide. The bonding strength of the coating prepared in example 4 is obviously higher than that of the coating prepared in example 1, and the bonding strength of the material can be further improved by adding the composite additive.

4. Tribology Performance testing

The test adopts a spherical disc type friction wear testing machine (MS-T3001 type) to test the friction wear performance of the coating at normal temperature, and the tested friction pair (to-grinding piece) is Si with phi 4mm₃N4 steel ball, friction radius of 5mm, rotation angular speed of 382rpm, load of 10N, test time of 30 min.

The depth of the grinding mark, the interface area of the grinding mark and the 3D microscopic morphology of the grinding mark are measured by a three-dimensional surface profiler (Dektak XT), each sample is repeatedly measured for 3 times to obtain different areas, and the average value is calculated. After the friction and wear test, the wear rate of the coating sample is used for measuring the friction and wear performance, and the lower the wear rate of the coating is, the better the wear performance is. The wear rate is calculated according to the following formula:

W％＝V/(PL)×100％

where V is the wear volume, P is the normal load, and L is the glide distance.

The results of the above tests on comparative examples 1 to 2 and examples 1 to 4 are shown in Table 1.

TABLE 1 coating fretting wear results

Sample (I)	Coefficient of friction	Width of grinding crack/mm	Wear rate/mm³/(N·m)	Depth of grinding crack/mum
					Comparative example 1	0.13	0.36	45	4.93
Comparative example 2	0.27	0.94	11.43	9.46
					Example 1	0.58	0.98	3.32	4.21
Example 2	0.51	0.76	5.12	6.23
					Example 3	0.56	0.91	4.89	5.49
Example 4	0.61	0.95	2.71	4.01

As can be seen from the analysis in Table 1, the friction coefficient of the coating prepared in example 1 is obviously higher than that of comparative example 1 and comparative example 2, and is equivalent to that of examples 2-4; and the wear rate of the coating prepared in the embodiment 1-4 is 10mm³Lower than N.m, the reduction is larger compared with comparative example 1 and comparative example 2; the results show that the addition of the feldspar powder and the serpentine powder and the titanium dioxide have a synergistic effect, so that the friction coefficient of the coating material is effectively improved, and the effect is obtained by the combined action of larger surface roughness of the coating and higher hardness of the coating; and the addition of the composite additive can further maintain the excellent wear performance of the coating material.

5. Heat resistance test

And (3) moving the coating to a muffle furnace, respectively taking a point every 30 ℃ in the range of 300-800 ℃ in the air atmosphere, calcining for 5h at the temperature, taking out the calcined coating, cooling to room temperature, testing the contact angle of the surface of the coating until mutation occurs, taking a point around the mutation value, and determining the maximum tolerance temperature value.

The results of the above tests on comparative examples 1 to 2 and examples 1 to 4 are shown in FIG. 5. Analysis in the figure shows that the maximum tolerance temperature of the coating prepared in example 1 is 749 ℃, which is obviously higher than that of comparative example 1 and comparative example 2, and slightly better than that of examples 2-3, and the addition of the feldspar powder and the serpentine powder and the titanium dioxide have a synergistic effect, so that the heat resistance of the coating material is effectively improved, and the temperature use range is enlarged. The bonding strength of the coating prepared in example 4 is higher than that of the coating prepared in example 1, and the addition of the composite additive can further improve the heat resistance of the material.

6. Acid and alkali resistance

5 mul of water drops with different pH values were dropped on the surface of the coating and the contact angle of the drop was tested after 1 min.

The results of the above tests on the coatings obtained in comparative example 2 and example 1 are shown in FIG. 6. Analysis in the figure shows that the acid and alkali resistance of the coating prepared in the example 1 is obviously higher than that of the coating prepared in the comparative example 2 under different pH values, and the stability is good, so that the addition of feldspar powder and serpentine powder and titanium dioxide are synergistic, and the acid and alkali corrosion resistance of the coating material is effectively improved.

Test example 2:

performance test of novel heat-conducting material

1. Tensile strength

The tensile test is carried out on a Zwick-150 type electronic tensile testing machine, the tensile speed is 2mm/min, the ambient temperature is 25 ℃, and the tensile sample is manufactured according to GB 3076-82 'method for testing the tensile of a metal sheet strip'.

The above tests, and the hardness and bonding strength tests (the test method is the same as that of test example 1) were carried out on the materials obtained in comparative example 3, example 5 and example 6, and the results are shown in Table 2.

TABLE 2 test results of various indexes of material performance

As can be seen from Table 2, the tensile strength, hardness and bonding force of the material prepared in example 5 are obviously higher than those of the material prepared in comparative example 3, which shows that the mechanical property of the material can be effectively improved by forming the plasma layer after adding the feldspar powder and the serpentine powder, and the bonding force between the plasma layer and the matrix material is improved to a certain extent; the tensile strength and the hardness of the coating are better than those of the coating in the embodiment 5, and the binding force 2 has an obvious improvement effect, so that the existence of the composite additive in the coating has an enhancement effect on the improvement of the mechanical property of the material, and particularly, the binding force between the coating and the plasma layer can be obviously improved, and the service life of the material is prolonged.

2. Temperature relative stability Performance test

Taking sample materials with the same size, heating the sample materials by using the same flame at the same experiment temperature, measuring the temperature of the materials by using an infrared thermometer, recording the temperature difference change per minute within 5min, and recording.

The results of the above tests on the materials obtained in comparative example 3, example 5 and example 6 are shown in Table 3.

TABLE 3 temperature variation of materials per minute (. degree. C.)

Sample (I)	1min	2min	3min	4min	5min
						Comparative example 3	46.4±0.2	33.6±0.3	22.8±0.1	16.1±0.4	8.9±0.2
Example 5	25.1±0.1	19.8±0.2	17.4±0.3	18.1±0.1	16.7±0.3
						Example 6	20.3±0.3	16.7±0.4	15.9±0.2	16.1±0.3	15.1±0.1

As can be seen from Table 2, compared with comparative example 3, the temperature difference trend of the material prepared in example 5 is obviously smaller and tends to be stable, which indicates that the heat-conducting property of the material can be improved by adding feldspar powder and serpentine powder, and the temperature difference can be kept stable in the temperature rising process. And the effect of example 6 is better than that of example 5, indicating that the presence of the complex additive has a synergistic effect.

Conventional techniques in the above embodiments are known to those skilled in the art, and therefore, will not be described in detail herein.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A preparation method of a non-stick coating for a non-stick pan comprises the following steps:

and (4) thermal spraying, namely spraying the coating A on the surface of the base material subjected to sand blasting treatment to obtain a non-stick coating.

2. The method for preparing the non-stick coating for the non-stick cookware as claimed in claim 1, wherein: the raw material components of the non-stick coating comprise, by weight, 22-32 parts of octavinyl polyhedral oligomeric silsesquioxane, 80-100 parts of distyrylphenol polyoxyethylene ether, 2-4 parts of methyl triacetoxysilane, 14-18 parts of titanium dioxide, 16-20 parts of feldspar powder, 6-9 parts of serpentine powder and 4-7 parts of an auxiliary agent; the auxiliary agent comprises 50% of silica sol, 15% of flatting agent and 35% of dispersing agent by mass percent.

3. The method for preparing the non-stick coating for the non-stick cookware as claimed in claim 2, wherein: the raw material components of the non-stick coating further comprise: 1-3 parts by weight of a composite additive; the composite additive is prepared from the following components in a mass ratio of 2-3: 1.3-1.8: 1.8-3.2 of mercaptopropyltrimethoxysilane, chloropropyltriethoxysilane and 3- [ [2- (biotinimido) ethyl ] dithio ] propionic acid sulfo-group succinimide ester.

4. The method for preparing the non-stick coating for the non-stick cookware as claimed in claim 1, wherein: the water contact angle of the non-stick coating is more than or equal to 150 degrees.

5. A new heat conductive material for a non-stick pan, comprising:

a base material (1) which is an aluminum alloy or stainless steel;

a plasma layer (2) coated on the base material (1);

the non-stick coating (3) of claim 1 applied to a plasma layer (2).

6. The new heat conductive material for non-stick pan as claimed in claim 5, wherein: the plasma layer (2) is made of MCrALY, feldspar powder and serpentine powder, and the particle size is 64-76 mu m; the spraying current of the plasma layer (2) is 400-800A, the voltage is 25-45V, the powder feeding amount is 50-80 g/min, the spraying distance is 10-20 mm, and the spraying time is 90-120 s.

7. The new heat conductive material for non-stick pan as claimed in claim 5, wherein: the thickness of the plasma layer (2) is 36-44 mu m, and the roughness range is as follows: ra is 10-13 μm, Rz is 56-64 μm; the thickness of the non-stick coating is 22-28 mu m.

8. The new heat conductive material for non-stick pan as claimed in claim 5, wherein: the coating method of the non-stick coating (3) is thermal spraying, and the operating temperature of the thermal spraying process is 150-250 ℃.

9. A new heat-conducting material non-stick pan with annular concave-convex textures at the bottom comprises: a pot body made of the new heat conductive material of claim 5.

10. The new heat conducting material non-stick pan with the annular concave-convex texture at the bottom as claimed in claim 9, wherein: the inner surface of the bottom of the pot body is provided with a plurality of bulges which are uniformly distributed in a ring shape; the inner surface of the bottom of the pot body is provided with a plurality of grooves which are uniformly distributed in a ring shape; the bulges are semi-spherical.