CN116004040B

CN116004040B - Non-stick material, non-stick coating, preparation method thereof and non-stick cooker

Info

Publication number: CN116004040B
Application number: CN202211714743.6A
Authority: CN
Inventors: 袁华庭; 张静; 瞿义生; 张明
Original assignee: Wuhan Supor Cookware Co Ltd
Current assignee: Wuhan Supor Cookware Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2024-06-07
Anticipated expiration: 2042-12-29
Also published as: CN116004040A

Abstract

The invention provides a non-stick material, a non-stick coating, a preparation method thereof and a non-stick cooker comprising the non-stick coating. The non-stick material includes a liquid curing agent and a powdered fatty acid salt. According to the present inventive concept, the powder fatty acid salt is directly fixed on the surface of the cooker substrate by the liquid curing agent to form a film, so that the integrity of the fatty acid anhydride group is maintained to the greatest extent, and the best non-stick effect is maintained.

Description

Non-stick material, non-stick coating, preparation method thereof and non-stick cooker

Technical Field

The present inventive concept relates to a non-stick material, a non-stick coating layer, a method of preparing the same, and a non-stick cooker including the same.

Background

The implementation of the non-stick technology mainly has three directions: 1) Self low surface energy; 2) Forming a hydrophobic and oleophobic surface similar to the lotus leaf surface through a micro concave-convex structure; 3) The porous reservoir forms a stable oil film to achieve non-stick properties using the oil as an intermediary.

The non-stick materials for the cooker at present mainly comprise fluorine paint, ceramic paint and organic silicon resin, and the three non-stick materials mainly form a non-stick coating on the inner surface of the cooker in a spraying mode so as to achieve the purpose of non-stick when food is heated. The fluorine paint mainly comprises PTFE (polytetrafluoroethylene), PFOA (ammonium perfluorooctanoate), PFA (copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), FEP (perfluoroethylene propylene copolymer), ETFE (ethylene-tetrafluoroethylene copolymer) and the like, and the non-sticking principle is mainly that the fluorine-containing polymer has extremely low surface free energy. The ceramic coating is mainly coating with inorganic silicon with a silicon-oxygen bond structure as a main component, and the ceramic coating achieves the non-sticky effect mainly by forming a nano structure on the surface of the cooker. The organic silicon resin achieves the effect of non-sticking by mainly utilizing the characteristic of low surface energy. Although the three coatings have non-sticking effects, the three coatings have obvious defects: the fluorine coating is not sticky and wear-resistant, so that a shovel cannot be used in cooking, a steel wire ball and a scouring pad cannot be used for cleaning, harmful substances can be generated by decomposition at high temperature, and the non-tackiness is reduced after abrasion; the ceramic coating has a lower non-stick effect than the fluorine coating, and is non-stick mainly by using silicone oil in a coating system, but has poor lasting non-stick property, and the coating can easily fall off after being used for 3-6 months generally; the non-sticking effect of the organosilicon coating is also poorer than that of the fluorine coating, the color of the organosilicon coating is easy to yellow or ash after the organosilicon coating contacts high temperature or open fire, the hardness of the organosilicon coating is reduced at high temperature, and the phenomenon of 'back sticking' is easy to occur.

Therefore, the non-stick material has the common phenomena of lasting non-stick property, poor high-temperature resistance and quick-frying property.

Disclosure of Invention

In order to solve the technical problems, the application provides a non-stick material, a non-stick coating, a preparation method thereof and a non-stick cooker comprising the non-stick coating.

The non-stick material according to the inventive concept may include a liquid curing agent and a powdered fatty acid salt.

In an embodiment, the fatty acid salt may include at least one of stearate, palmitate, oleate, linoleate, laurate, linolenate, and the like.

In an embodiment, the liquid curing agent includes dimethylsiloxane, silica sol, and low melting point fatty acid, wherein the low melting point fatty acid may include at least one of oleic acid, linoleic acid, and linolenic acid.

In an embodiment, the non-stick material may include: 10 to 20 parts by weight of dimethylsiloxane; 50-70 parts by weight of silica sol; 10-15 parts by weight of fatty acid salt; and 3 to 5 parts by weight of a low melting point fatty acid.

In an embodiment, the particle size of the powdered fatty acid salt may be 800 mesh to 1500 mesh.

The method of preparing a non-stick coating according to an embodiment of the present invention may include: preparing a non-stick material; applying a non-stick material to a surface of a substrate; sintering the substrate with the non-stick material laid thereon to obtain the non-stick coating arranged on the substrate, wherein the non-stick material comprises a liquid curing agent and a powdery fatty acid salt.

In an embodiment, a method of preparing a non-stick material may include: preparing a mixed solution of dimethyl siloxane and silica sol and powdery fatty acid salt; adding the powdered fatty acid salt to the mixed solution to disperse the powdered fatty acid salt in the mixed solution; a low melting point fatty acid is added to the mixed solution in which the powdery fatty acid salt is dispersed to obtain a non-stick material, wherein the low melting point fatty acid may include at least one of oleic acid, linoleic acid, and linolenic acid.

In an embodiment, the sintering temperature is 200-300 ℃ and the sintering time is 3-8 min.

The non-stick coating according to embodiments of the present invention may be obtained by the above-described preparation method.

In an embodiment, the thickness of the non-stick coating may be 20 μm to 30 μm.

Non-stick cookware according to embodiments of the invention may include a cookware base and a non-stick coating prepared using the above-described preparation method.

According to the conception of the invention, the powdery fatty acid salt is directly fixed on the surface of the cooker substrate by the liquid curing agent to form a film, so that the integrality of the fatty acid anhydride group is reserved to the greatest extent, the best non-stick effect is reserved, and in addition, the dimethyl siloxane is added into the liquid curing agent, so that the non-stick effect of the cooker is assisted to be improved.

Detailed Description

The present invention will now be described more fully hereinafter, however, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Now, exemplary embodiments of the present invention will be described in detail hereinafter.

In the cooking of food using a cooker, sticking of the food to the cooker often occurs. The foods of the saucepan are mainly starches and proteins. Specifically, during cooking, starch undergoes a series of processes of water absorption, swelling, gelatinization, and final carbonization, while protein undergoes a series of processes of peptide chain dissociation denaturation, hydrolytic inactivation, and final dehydration carbonization. In this series of processes the starch gel and protein gel bind to the cookware surface, thus starting to stick to the pot, until after carbonization of the food contact surface, the adhesive force peaks. Based on the above aspects, the mechanism of sticking the pot is mainly three theories:

(1) Theory of mechanical bonding: the adhesive force comes from the mechanical interlocking of the two surfaces and is connected together by the actions of anchoring, hooking, wedging and the like, and in fact, the force does not play a major role;

(2) Adsorption theory: the main sources of adhesion caused by molecular contact and interfacial forces between the two materials are intermolecular forces, including hydrogen bonding forces and van der Waals forces, which are dominant in the gelling process;

(3) Chemical bond theory: atoms between the two materials form chemical bonds, the bond energy of which is much greater than the intermolecular effect, and the binding force is stronger, and the acting force is dominant in the food scorching process.

Among the above theories, the mechanical bonding can be solved by improving the surface roughness of the cooker, and the adsorption theory can be solved by grease, i.e., by forming an oil film on the surface of the cooker to significantly weaken intermolecular forces of food and the surface of the cooker. Therefore, according to the chemical bond theory, the fat non-stick coating can be formed on the surface of the cooker substrate by high-temperature sintering in an air spraying or electrostatic spraying mode, so that the purpose of non-stick is achieved. However, spraying the powder onto the base of the cooker by the spraying method causes the fatty acid anhydride group portion of the powder surface to be oxidized, crosslinked and stuck, resulting in a decrease in the final non-sticking.

To this end, the present inventive concept provides a non-stick material, a method of preparing the same, and a non-stick coating formed therefrom. Wherein the non-stick material may include a powdered fatty acid salt and a liquid curing agent, and the powdered fatty acid salt may be uniformly dispersed in the liquid curing agent. Therefore, the powder dispersed in the curing agent is fixed on the surface of the base material of the cooker to form a film by utilizing the curing reaction of the curing agent, so that the integrity of fatty acid anhydride groups can be reserved to the greatest extent, and the best non-sticking effect is reserved, thereby improving the anti-sticking performance of the cooker and greatly reducing the occurrence of the pot burning phenomenon.

The inventive concept will be described in detail below in connection with exemplary embodiments.

The non-stick material according to exemplary embodiments of the inventive concept may include a powdered fatty acid salt and a liquid curing agent.

In an embodiment, the fatty acid salt may be a salt of a fatty acid that can be used in the art to form an oil film on a base of a cooker, and may include at least one of stearate, palmitate, oleate, linoleate, laurate, and linolenate. When the pot pasting occurs, the contact of the fatty molecular chains of the fatty acid salts in the non-stick coating layer of the cooker surface with the food molecules can replace the bonding of the metal atoms of the cooker surface with the atoms of the food, so that the non-stick effect of the cooker can be improved.

In embodiments, the particle size of the powdered fatty acid salt may be in the range of 800-1500. This is because: if the powder is too coarse, the prepared coating is coarse, so that the cooking experience is poor, and the dispersibility is poor, so that the coating is easy to settle; conversely, if the powder is too fine, the preparation is difficult, resulting in an increase in cost.

In embodiments, the liquid curing agent may include dimethyl siloxane, silica sol, and low melting point fatty acid. The dimethyl siloxane (commonly called as silicone oil) contained in the liquid curing agent is a non-stick additive, can be dissolved in silica sol and can assist in improving the non-stick effect, the silica sol is mainly used for dispersing powdery fatty acid salt, and the low-melting-point fatty acid can adjust the pH value of the non-stick material to a pH value suitable for the liquid curing agent to perform sol-gel reaction.

In an embodiment, the low melting point fatty acid may refer to a fatty acid that is liquid at normal temperature, and may include at least one of oleic acid, linoleic acid, and linolenic acid. However, the exemplary embodiments are not limited thereto, and other suitable low melting point fatty acids may be used with the present invention.

In embodiments, the amount of the dimethylsiloxane may be in the range of 10 to 20 parts by weight, for example, the amount of the dimethylsiloxane may be 10 to 19 parts by weight, 10 to 18 parts by weight, 10 to 17 parts by weight, 10 to 16 parts by weight, 10 to 15 parts by weight, 10 to 14 parts by weight, 10 to 13 parts by weight, or 10 to 12 parts by weight. When the amount of the dimethylsiloxane is within the range of 10 to 20 parts by weight, the effect of assisting in improving the non-stick effect can be achieved, and when the amount of the dimethylsiloxane is less than 10 parts by weight, the initial non-stick property of the finally formed coating is poor, and when the amount of the dimethylsiloxane is more than 20 parts by weight, the dimethylsiloxane cannot be completely dispersed in the coating, and the excessive part overflows and deposits on the surface of the coating, so that the greasy feeling of the surface of the coating is caused, and the compactness and uniformity of film formation of the coating are affected.

In embodiments, the amount of the silica sol may be in the range of 50 to 70 parts by weight, for example, the amount of the silica sol may be 50 to 65 parts by weight, 50 to 60 parts by weight, or 50 to 55 parts by weight. When the amount of the silica sol is in the range of 50 to 70 parts by weight, the powdery fatty acid salt can be uniformly dispersed therein. When the amount of the silica sol is less than 50 parts by weight, the amount of the silica sol is insufficient to disperse the powdery fatty acid salt, and thus, the powdery fatty acid salt may be agglomerated, thereby reducing the non-sticking effect of the non-stick coating. When the amount of the silica sol is more than 70 parts by weight, the dispersion concentration of the powdery fatty acid salt is reduced, and the non-tacky effect of the finally formed non-tacky coating layer is also reduced.

In an embodiment, the amount of the powdery fatty acid salt may be in the range of 10 parts by weight to 15 parts by weight. For example, the amount of the powdery fatty acid salt may be 10 to 14 parts by weight, 10 to 13 parts by weight, 10 to 12 parts by weight, or 10 to 11 parts by weight. When the amount of the powdery fatty acid salt is less than 10 parts by weight, the amount of the fatty acid salt in the finally formed non-stick coating layer is too small, resulting in a decrease in the non-stick effect of the coating layer. If the amount of the powdery fatty acid salt is too large, for example, more than 15 parts by weight, the fatty acid salt is not uniformly dispersed in the liquid curing agent, for example, an agglomeration phenomenon may occur, and thus the distribution of the fatty acid salt in the finally formed non-tacky coating layer is uneven, which may also result in a decrease in the non-tacky effect of the non-tacky coating layer.

In an embodiment, the amount of the low melting point fatty acid may be in the range of 3 parts by weight to 5 parts by weight. For example, the amount of the low melting point fatty acid may be 3 to 5 parts by weight, for example, 3 to 4.5 parts by weight, 3 to 4 parts by weight, or 3 to 3.5 parts by weight. When the amount of the low melting point fatty acid added is in the range of 3 parts by weight to 5 parts by weight, the pH of the non-stick material may be adjusted to a pH of 4.8 to 5.5 suitable for the sol-gel reaction of the liquid curing agent.

The non-stick material including the powdery fatty acid salt and the liquid curing agent according to the inventive concept is described in detail above in connection with exemplary embodiments. The non-stick material according to the inventive concept may comprise the various components described above separately or in combination so that the product may be prefabricated or prefabricated just prior to use. However, the exemplary embodiments are not limited thereto.

Hereinafter, a method of preparing a non-stick coating using the above-described non-stick material will be described in detail with reference to exemplary embodiments.

The method of preparing the non-stick coating according to the inventive concept may include: preparing a non-stick material; applying a non-stick material to a surface of a substrate; sintering the substrate with the non-stick material laid thereon to obtain the non-stick coating disposed on the substrate.

In embodiments, the non-stick material may include a liquid curing agent and a powdered fatty acid salt. The detailed description of the non-stick material already above is equally applicable to the method described herein, and thus redundant description repeated with the above description is omitted here.

The method of preparing a non-stick material according to the inventive concept may include: preparing a mixed solution of dimethyl siloxane and silica sol and powdery fatty acid salt respectively; adding the powdered fatty acid salt to the mixed solution to disperse the powdered fatty acid salt in the mixed solution; a low melting point fatty acid is added to the mixed solution in which the powdery fatty acid salt is dispersed to obtain a non-stick material.

Specifically, the powdery fatty acid salt may be prepared and ground so that the particle size thereof may satisfy the range of 800 mesh to 1500 mesh. For example, when a milling step is included, the prepared fatty acid salt may be milled using any suitable milling method such that the fatty acid salt after milling is in powder form and may have a particle size of 800 mesh to 1400 mesh, 800 mesh to 1300 mesh, 800 mesh to 1200 mesh, 800 mesh to 1100 mesh, 800 mesh to 1000 mesh, or 800 mesh to 900 mesh. If the particle size of the powdery fatty acid salt is too coarse, for example, less than 800 mesh, the prepared non-stick coating is coarse, the user's frying experience is poor, and the powdery fatty acid salt is poor in dispersibility and easy to settle, and if the particle size of the powdery fatty acid salt is too fine, for example, more than 1400 mesh, the preparation is difficult and the cost is high. However, the exemplary embodiment is not limited thereto, and the grinding step may be omitted.

Before, during or after the preparation of the powdered fatty acid salt, dimethylsiloxane may be added to the silica sol to form a mixture. For example, 10 to 20 parts by weight, 12 to 18 parts by weight, or 15 to 17 parts by weight of dimethylsiloxane may be added to 50 to 70 parts by weight, 55 to 65 parts by weight, or 58 to 63 parts by weight of silica sol. After the dimethylsiloxane is added to the silica sol, the powdery fatty acid salts which have been prepared above may be added to the mixture in an amount of 10 to 15 parts by weight, 11 to 15 parts by weight, 12 to 14 parts by weight or 13 to 15 parts by weight, and then they may be uniformly mixed by means of mechanical stirring. Here, the stirring rate may be 1000rpm/min to 2000rpm/min and the stirring time may be 15min to 30min.

In addition, during the above stirring, an antifoaming agent may be optionally added in an amount of 1 to 3 parts by weight, for example, 1 to 2.5 parts by weight, 1 to 2 parts by weight, or 1 to 1.5 parts by weight. The defoamer can be at least one of polyether modified silicone oil and organic silicone oil. However, the embodiments are not limited thereto, and other suitable defoamers commonly used in the art may be selected, or the defoamers may be omitted.

After mixing the powdered fatty acid salt in the mixture of dimethylsiloxane and silica sol, a low melting point fatty acid may be added to the resultant to adjust the pH of the resultant. For example, 3 to 5 parts by weight, 3.5 to 4.8 parts by weight, 3.8 to 4.6 parts by weight of a low melting point fatty acid may be added to the mixture of the powdery fatty acid salt with dimethylsiloxane and silica sol to adjust the pH of the mixture to a pH at which the liquid curing agent undergoes a sol-gel reaction, and in particular, the pH may be 4.8 to 5.5. According to an exemplary embodiment, the low melting point fatty acid may include at least one of oleic acid, linoleic acid, and linolenic acid. However, embodiments are not limited thereto and other suitable low melting point fatty acids may be used with the present invention.

The non-stick material prepared as described above may then be applied to the surface of a substrate to form a non-stick coating.

According to the exemplary embodiments, when the non-stick coating layer is formed on the substrate of the cooker using the above method of forming the non-stick coating layer, the cooker having excellent non-stick properties can be obtained.

Thus, a method of forming a cookware including a non-stick coating according to an example embodiment may include providing a cookware base and forming a non-stick coating on the base of the cookware.

In an embodiment, the base of the cooker is used to provide a receiving space for operations of the cooker, such as cooking. Accordingly, the substrate may be manufactured in various shapes using a material such as metal. For example, according to an exemplary embodiment, the substrate may include at least one of iron, aluminum, copper, tin, titanium alloy, stainless steel, antibacterial stainless steel, and cast iron, and may have a single-layer or multi-layer structure. However, the material of the base of the cooker is not limited to metal, but a base material known in the art may be used. In addition, the substrate may be formed to have an angled shape and/or a rounded shape depending on the process, aesthetic appearance, and specific needs. After providing the base of the cooker, the surface of the base may be selectively subjected to an etching treatment. For example, some concave-convex structures can be formed on the surface of the base body of the cooker through an etching process so as to facilitate oil storage, and lotus leaf structures can be formed, so that the non-sticking effect can be improved through the concave-convex structures and the lotus leaf structures. However, the inventive concept is not limited thereto, and the non-stick material may be directly applied on the surface of the substrate.

Thereafter, the non-stick material described above may be applied to the surface of the substrate to obtain a cooker having a non-stick coating. Here, the step of applying the non-stick coating may be achieved by an air spraying process. According to an example, the process of air spraying may include: preheating a substrate to 50-60 ℃, and then spraying a non-stick material on the surface of the substrate by using an air spraying process, wherein the spraying parameters of the air spraying can be as follows: the caliber of the spray gun is 0.8-1.5mm; the spraying distance is 200 mm-250 mm; the air pressure is 0.2 MPa-0.4 MPa. However, the exemplary embodiments are not limited to the steps and parameters of applying the non-stick material to form the non-stick coating.

The thickness of the non-stick coating prepared according to the above method may be in the range of 20 μm to 30 μm, for example, the thickness of the non-stick coating may be 21 μm to 29 μm, 22 μm to 28 μm, 23 μm to 27 μm, or 24 μm to 25 μm. If the coating is too thin, for example, less than 20 μm, it is difficult to protect the whole surface because of leaks or weak points caused by uneven spraying, and if the coating is too thick, for example, more than 30 μm, sagging is easily caused and cost is wasted.

After the non-stick material is applied to the surface of the base body of the cooker, the base body with the non-stick material applied thereto may be sintered. Here, the sintering temperature may be 200℃to 300℃and the sintering time may be 3min to 8min. Thus, a non-sticking cooker having excellent non-sticking properties was obtained.

The non-stick material, the method of preparing the non-stick coating using the non-stick material, the non-stick coating formed by the method, and the cooker including the non-stick coating according to the inventive concept are described above in connection with the exemplary embodiments. According to the invention, the powdery fatty acid salt is directly fixed on the surface of the cooker substrate by using the liquid curing agent to form a film, so that the integrity of fatty acid anhydride groups is maintained to the greatest extent, and the best non-stick effect is maintained. In addition, the dimethyl siloxane is added into the liquid curing agent, so that the non-stick effect can be improved in an auxiliary manner.

In the following, the advantageous effects of the inventive concept will be represented by specific examples of the inventive concept.

Example 1

Sodium laurate particles were prepared as powdery fatty acid salt, and the sodium laurate particles were ground to a particle size of 1000 mesh.

15 Parts by weight of dimethylsiloxane are added to 60 parts by weight of silica sol, and then 12 parts by weight of prepared powdered sodium laurate are added and stirred at a mechanical stirring rate of 1500rpm/min for 20min. During the stirring, 2 parts by weight of silicone oil was added to perform defoaming treatment.

After the completion of the stirring, the powdered sodium laurate was uniformly dispersed in the silica sol, at which time 4 parts by weight of oleic acid was added thereto to adjust the pH to 5.2.

Preparing a cast iron pot embryo. Cleaning the cast iron pot embryo, and drying for later use.

The prepared non-stick material is laid on the surface of the prepared cast iron pot blank by an air spraying method, and the specific process of air spraying is as follows: preheating a cast iron pot embryo to 55 ℃; then, spraying the prepared non-stick material on the surface of the pot blank through air; the air spraying parameters were as follows: the spraying distance is 200mm; the air pressure was 0.3MPa.

Then, the cast iron pot blank with the non-stick material laid thereon is placed in a furnace at 280 ℃ for sintering for 4min, so that the liquid curing agent is fully cured, and finally, a non-stick coating with the thickness of 25 mu m is formed on the surface of the cast iron pot blank.

Example 2

The difference from example 1 is that: sodium oleate is used instead of sodium laurate.

Example 3

The difference from example 1 is that: linoleic acid was used instead of oleic acid.

Example 4

The difference from example 1 is that: the amount of sodium laurate was 10 parts by weight.

Example 5

The difference from example 1 is that: the amount of sodium laurate was 15 parts by weight

Example 6

The difference from example 1 is that: the amount of dimethylsiloxane was 10 parts by weight.

Example 7

The difference from example 1 is that: the amount of dimethylsiloxane was 20 parts by weight.

Example 8

The difference from example 1 is that: the amount of silica sol was 50 parts by weight.

Example 9

The difference from example 1 is that: the amount of silica sol was 70 parts by weight.

Example 10

The difference from example 1 is that: the amount of the low melting point fatty acid was 3 parts by weight.

Example 11

The difference from example 1 is that: the amount of the low melting point fatty acid was 5 parts by weight.

Example 12

The difference from example 1 is that: the sintering temperature was 200 ℃.

Example 13

The difference from example 1 is that: the sintering temperature was 300 ℃.

Example 14

The difference from example 1 is that: the sintering time was 3min.

Example 15

The difference from example 1 is that: the sintering time was 8min.

Comparative example 1

The difference from example 1 is that: sodium laurate was not added.

Comparative example 2

The difference from example 1 is that: the amount of sodium laurate was 5 parts by weight.

Comparative example 3

The difference from example 1 is that: the amount of sodium laurate was 20 parts by weight.

Comparative example 4

The difference from example 1 is that: no dimethylsiloxane is added.

Comparative example 5

The difference from example 1 is that: no silicone oil was added as an antifoaming agent.

Performance tests were performed on the cookware obtained above and recorded in table 1 below, and "—" in table 1 represents the same data as the corresponding data in example 1.

The specific performance test method comprises the following steps:

1. non-tackiness test: the test is carried out according to the requirements of GB32095.1-2015, and the test is divided into I, II and III, wherein the I is the best in non-tackiness and the III is the worst in non-tackiness

2. Durable tack-free test: the test was performed according to the requirements of GB32388-2015 in terms of number of times, the higher the number of times is, the longer the life, 1000 times the non-stick results were evaluated once, and the number of times when used to grade III was recorded.

TABLE 1

As can be seen from Table 1, the pot non-stick test results according to examples 1-15 were all class I, and the non-stick durability test results were all 25000. While the non-tackiness test result of the cookware manufactured according to comparative examples 2 to 5 was class II, the non-tackiness test result of the cookware manufactured according to comparative example 1 was class I, but the non-tackiness durability test result was 500, indicating that the fatty acid salt may affect the non-tackiness durability of the finally formed coating. In addition, the test results of non-sticking durability according to comparative examples 2 and 3 were 1000 and 6000, respectively, showing that the amount of the fatty acid salt may affect the non-sticking durability of the formed coating, and in particular, when the amount of the fatty acid salt is 10 to 15 parts by weight, the formed coating has good non-sticking durability, and when the amount of the fatty acid salt is less than 10 parts by weight or more than 15 parts by weight, the non-sticking durability of the formed coating is decreased.

According to embodiments of the present disclosure, a non-stick material, a non-stick coating, a method of preparing the same, and a non-stick cookware including the non-stick coating are provided. The nonstick material comprises a liquid curing agent and powdery fatty acid salt, wherein the powdery fatty acid salt is directly fixed on the surface of a cooker substrate by the liquid curing agent to form a film, the integrity of fatty acid anhydride groups is reserved to the greatest extent, the best nonstick effect is reserved, and in addition, dimethyl siloxane is added into the liquid curing agent to assist in improving the nonstick effect of the cooker.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art or those having ordinary skill in the art that various modifications and changes may be made to the present invention without departing from the spirit and technical field of the present invention as described in the appended claims. Therefore, the technical scope of the present invention should not be limited to what is described in the specific embodiments of the specification, and the claimed invention should be defined by the claims.

Claims

1. A non-stick material, characterized in that,

The non-stick material comprises: a liquid curing agent and a powdered fatty acid salt,

Wherein the liquid curing agent comprises dimethylsiloxane, silica sol and low melting point fatty acid, and

Wherein, in the non-stick material, the content of the dimethyl siloxane is 10 to 20 parts by weight, the content of the silica sol is 50 to 70 parts by weight, the content of the fatty acid salt is 10 to 15 parts by weight, and the content of the low-melting point fatty acid is 3 to 5 parts by weight.

2. The non-stick material of claim 1 wherein the non-stick material is,

The fatty acid salt includes at least one of stearate, palmitate, oleate, linoleate, laurate, and linolenate.

3. The non-stick material of claim 1 wherein the non-stick material is,

The low melting point fatty acid includes at least one of oleic acid, linoleic acid and linolenic acid.

4. The non-stick material of claim 1 wherein the powdered fatty acid salt has a particle size of 800 mesh to 1500 mesh.

5. A method of preparing a non-stick coating, the method comprising:

Preparing a non-stick material comprising: preparing a mixed solution of dimethyl siloxane and silica sol and powdery fatty acid salt; adding a powdered fatty acid salt to the mixed solution to disperse the powdered fatty acid salt in the mixed solution; and adding a low melting point fatty acid to the mixed solution in which the powdery fatty acid salt is dispersed;

applying a non-stick material to a surface of a substrate;

sintering the substrate with the non-stick material laid thereon to obtain a non-stick coating disposed on the substrate,

6. The method of claim 5, wherein the low melting point fatty acid comprises at least one of oleic acid, linoleic acid, and linolenic acid.

7. The method of claim 5, wherein the sintering temperature is 200 ℃ to 300 ℃ and the sintering time is 3min to 8min.

8. A non-stick coating, characterized in that it is produced by the production method according to any one of claims 5 to 7.

9. The non-stick coating of claim 8, wherein the thickness of the non-stick coating is 20 μιη to 30 μιη.

10. A non-stick cookware, characterized in that it comprises a cookware base and a non-stick coating prepared by the preparation method of any of claims 5-7.