A wear-resistant and stain-resistant coating and a method for preparing the same

Abstract

The application relates to the technical field of coating materials, in particular to a wear-resistant and stain-resistant coating and a preparation method thereof. The preparation method comprises the following steps: mixing tin antimony oxide powder, nanoparticles, graphene and activated carbon powder, adding grinding medium, uniformly mixing the grinding medium, separating the grinding medium, drying and activating treatment, and obtaining nano-activated powder; adding polytitanic acid ester and the activated powder into n-butyl ether solvent under stirring and dispersing to obtain a first dispersion liquid; mixing perhydro-polysilazane solution and the first dispersion liquid, then adding n-butyl ether and a leveling agent, mixing and dispersing to obtain a second dispersion liquid; carrying out activation treatment and plasma cleaning on the surface of a substrate, then immersing the substrate in the second dispersion liquid, uniformly pulling out the substrate, and standing to obtain a basic coating; carrying out wet drying and dry drying on the basic coating to obtain a target wear-resistant and stain-resistant coating, and the target wear-resistant and stain-resistant coating has the characteristics of easy cleaning and wear resistance and stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating materials, in particular to a wear-resistant and stain-resistant coating and a preparation method thereof. BACKGROUND

[0002] The hydrophilic material coating has a special surface wettability, can quickly form a water film on its surface when in contact with water, and can quickly float the stains on the surface, thereby achieving easy cleaning effect. The hydrophilic material coating has been gradually applied to the fields of building, photovoltaic, automobile, household appliance and the like. However, the hydrophilic material coating applied to the surface of a kitchen stove is not mature, and mainly has the following problems. There are stubborn stains in the kitchen, such as oil stains, various seasonings, and food secretions, and the existing coating is difficult to achieve complete easy cleaning. The stove table top will contact various high-hardness friction scenes, such as steel balls, iron pots, sand pots, and various metal cookware, which will cause irreversible damage to the coating in the actual use process. Moreover, the high-temperature and high-humidity scene is easy to form in the kitchen, and the stability of the coating is required to be extremely high. The stability of the existing coating is not enough, and it is difficult to adapt to the high-temperature and high-humidity scene for a long time. SUMMARY

[0003] In view of the above problems of the prior art, the present application provides a wear-resistant and stain-resistant coating and a preparation method thereof.

[0004] In a first aspect, the present application provides a preparation method of a wear-resistant and stain-resistant coating, which comprises the following steps:

[0005] S1. Mix tin antimony oxide powder, nano particles, graphene and activated carbon powder, separate the grinding medium after mixing uniformly with the grinding medium, and dry and activate the obtained mixed powder to obtain nano activated powder;

[0006] S2. Add polytitanic acid ester and activated powder into n-butyl ether solvent with stirring, mix and disperse uniformly to obtain a first dispersion liquid;

[0007] S3. Mix the perhydro-polysilazane solution with the first dispersion liquid, then add n-butyl ether and a leveling agent, mix and disperse to obtain a second dispersion liquid;

[0008] S4. Obtain a substrate, activate and plasma clean the surface of the substrate to obtain a pretreated substrate;

[0009] S5. Submerge the pretreated substrate in the second dispersion liquid, uniformly pull out the pretreated substrate from the second dispersion liquid, and obtain a base coating after standing;

[0010] S6. Dry the base coating after wet drying, and obtain a target wear-resistant and stain-resistant coating.

[0011] Further, the grinding medium comprises zirconia balls, and step S1 comprises:

[0012] S11. Take 5-20 parts of antimony tin oxide powder, 5-20 parts of nanoparticles, 0.1 parts of graphene, and 0.01-0.1 parts of activated carbon powder, and put them into a ball mill;

[0013] S12. Add zirconium oxide balls, stir at a speed of 180 r / min for 20 min, separate the zirconium oxide balls after mixing evenly, and obtain the mixed powder;

[0014] S13. Put the mixed powder into a drying box at 80°C, dry for 1 h, and take out;

[0015] S14. Put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1 L / min, clean the mixed powder, and obtain the nano-activated powder.

[0016] Further, the nanoparticles include but are not limited to one of zirconium dioxide, silicon carbide, boron carbide, titanium carbide, and silicon nitride.

[0017] Further, the specification of the antimony tin oxide powder is 10-20 nm; the specification of the nanoparticles is 10-50 nm; and the specification of the zirconium oxide ball is 0.05 mm.

[0018] Further, step S2 includes:

[0019] Take 0.2-2.1 parts of polytitanate and 3-8 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min, mix evenly, and use an ultrasonic homogenizer for dispersion to obtain a first dispersion liquid.

[0020] Further, step S3 includes:

[0021] Take 20-35 parts of perhydro-polysilazane solution and 25 parts of the first dispersion liquid, add 50 parts of n-butyl ether and 0.05-0.2 parts of leveling agent, and use an ultrasonic homogenizer for dispersion to obtain a second dispersion liquid.

[0022] Further, the solvent of the perhydro-polysilazane solution is n-butyl ether, and the concentration percentage of the n-butyl ether solvent in the perhydro-polysilazane solution is 20%.

[0023] Further, the leveling agent is perfluoro-octyl betaine or perfluoro-alkyl betaine.

[0024] Further, the substrate is glass, and step S4 includes:

[0025] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir and mix, pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine, clean for 20 min, take out, and dry;

[0026] The dried glass is put into a plasma cleaning machine and cleaned for 120s to obtain a pretreated substrate.

[0027] Further, in step S5, the pretreated substrate is immersed in the second dispersion liquid for 180min, and the uniform pulling speed is 3mm / s.

[0028] Further, in step S6, the wet drying of the base coating layer includes putting the base coating layer into a drying oven, and a preset amount of water is put into the drying oven; the wet drying conditions are humidity of 90% or more, normal pressure of 150℃, and drying time of 2h.

[0029] Further, in step S6, the dry drying of the base coating layer includes putting the base coating layer into a drying oven at 30℃, and drying for 0.5h.

[0030] On the other hand, the application provides a wear-resistant and stain-resistant coating prepared by the preparation method of the wear-resistant and stain-resistant coating as described above.

[0031] Compared with the prior art, the application has the following beneficial effects:

[0032] (1) The use of tin antimony oxide as an antistatic agent can increase the antistatic property of the nano-activated powder as a whole, reduce the electrostatic adsorption capacity of the coating surface, reduce the electrostatic adsorption property of stains, and further enhance the easy-to-clean property of the coating;

[0033] (2) The use of perhydro-polysilazane as a film-forming agent can provide high density and hardness after sufficient curing, good adhesion to the substrate, good cross-linking degree with high-hardness nano-particles, and increased wear resistance and water resistance of the material;

[0034] (3) The use of perfluoro-octyl betaine or perfluoro-alkyl betaine as a leveling agent can play the role of a small amount of surfactant, enhance hydrophilicity to a certain extent, and not introduce other functional groups to cause special adsorption problems of the material due to the presence of a double-sparse perfluoro-alkyl or double-sparse perfluoro-octyl and hydrophilic betaine group;

[0035] (4) The use of n-butyl ether as a solvent to prepare the second dispersion liquid is more environmentally friendly and has high food safety compared with the use of xylene dispersion liquid in the prior art;

[0036] (5) Wet drying at a relatively high humidity can make the nano-particles well composite on the perhydro-polysilazane to form a stable covalent structure, increase the uniformity and stability of the coating, make the coating have a high elastic modulus, be more wear-resistant, and prevent peeling. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0038] Figure 1 A preparation method flow chart of a wear-resistant and stain-resistant coating is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0039] The hydrophilic material coating can quickly form a water film on its surface when in contact with water, which can quickly float the stains on the surface, thereby achieving the effect of easy cleaning. At present, it has been gradually applied in the fields of building, photovoltaic, automobile, household appliance, etc. However, when applied to kitchen stoves, most of the current hydrophilic material coatings are immature, and the reasons are as follows: the kitchen has a relatively harsh environment, and the stains include not only oil stains but also various seasonings and food secretions (such as fish mucus, dragon fruit purple mucus, etc.), so it is difficult for both the dual-repellent coating and the super-hydrophilic coating to achieve complete easy cleaning; the kitchen has many high-hardness friction scenarios, such as steel balls, iron pots, sand pots, and various metal cookware, which can cause irreversible damage to the coating during actual use; the kitchen can form a high-temperature and high-humidity environment, and the stove surface can reach 130-250 degrees Celsius during actual use, and some coating positions can be immersed in a mixture of water, oil, and various seasonings (PH 3-12) for a long time, so the stability of the coating is extremely high, and the coating also needs certain toughness and thermal expansion coefficient similar to the base material to cope with the volume change caused by temperature change to prevent peeling; the position of the coating directly contacted with food needs to pass the relevant certification for direct contact with food, which has certain limitations on the use of coating raw materials.

[0040] Based on the problems in the prior art, the present application provides a wear-resistant and stain-resistant coating and a preparation method thereof. The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] In a first aspect, the present application provides a preparation method of a wear-resistant and stain-resistant coating, referring to Figure 1 The method comprises the following steps:

[0042] S1. Mix the antimony tin oxide powder, nanoparticles, graphene and activated carbon powder, add grinding medium, mix uniformly, separate the grinding medium, dry the obtained mixed powder and activate the mixed powder to obtain the nano-activated powder.

[0043] In a possible implementation, the grinding medium comprises zirconium oxide balls, and step S1 comprises:

[0044] S11. Take 5-20 parts of antimony tin oxide powder, 5-20 parts of nanoparticles, 0.1 part of graphene and 0.01-0.1 part of activated carbon powder, and put them into a ball mill; further, the size of the antimony tin oxide powder is 10-20 nm, and the size of the nanoparticles is 10-50 nm.

[0045] S12. Add zirconium oxide balls, further, the size of the zirconium oxide balls is 0.05 mm, stir at a speed of 180 r / min (alternately forward and reverse) for 20 min, separate the zirconium oxide balls using a 8000-mesh screen to obtain the mixed powder, and the mixed powder comprises the antimony tin oxide powder, zirconium dioxide powder, graphene and activated carbon powder.

[0046] S13. Put the mixed powder into a drying box at 80 DEG C, dry for 1 h and take out.

[0047] S14. Put the dried mixed powder into a plasma cleaning machine, pass oxygen with a humidity of 15%+ / -5% at a flow rate of 1 L / min, clean the mixed powder at a power of 500 W for 600 s to sufficiently activate the mixed powder, and obtain the nano-activated powder.

[0048] In a possible implementation, the nanoparticles include but are not limited to one of zirconium dioxide, silicon carbide, boron carbide, titanium carbide and silicon nitride.

[0049] In the preparation of the nano-activated powder, graphene is added, in the plasma activation process, due to the high energy and oxidizing property of the plasma, the elements in the activated carbon are ionized to force them to provide a large amount of carbon, oxygen and hydrogen atoms, so as to form some groups (most of which are hydrophilic to form hydroxyl groups, and a small part of free carbon atoms and ionized hydrogen and oxygen atoms will form ester groups, alkyl groups, ether groups and other uncertain groups to increase the stability of the nano-activated powder in n-butyl ether) with the ionized air and water in the plasma cleaning machine; the antimony tin oxide is used as an antistatic agent, which can increase the antistatic property of the nano-activated powder as a whole, reduce the static adsorption capacity of the coating surface, reduce the static adsorption property of the stain, and further enhance the easy-to-clean property of the coating. The use of high-hardness nanoparticles such as zirconium dioxide, silicon carbide, boron carbide, titanium carbide and silicon nitride increases the wear resistance of the coating.

[0050] S2. Add the polytitanate and the activated powder into the n-butyl ether solvent with stirring, stir, mix and disperse to obtain a first dispersion liquid.

[0051] In a possible implementation, step S2 comprises:

[0052] Take 0.2-2.1 parts of polytitanate and 3-8 parts of nano-activated powder, add them into 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min to mix uniformly, and use an ultrasonic homogenizer to disperse, to obtain a first dispersion liquid.

[0053] In some embodiments of the present application, the specification of the polytitanate is CAS: 9022-96-2. The polytitanate can greatly increase the dispersibility of inorganic materials in organic solvents, because the polytitanate can form a certain network structure, increase the viscosity, and thus prevent the aggregation of materials.

[0054] The dispersion using the ultrasonic homogenizer can use a 100ml ultrasonic homogenizer, disperse at a power of 450w for 35s, and the nano-activated powder can be fully dispersed to form the first dispersion liquid.

[0055] S3. Mix the perhydrogenated polysilazane solution with the first dispersion liquid, then add n-butyl ether and a leveling agent to mix and disperse, to obtain a second dispersion liquid.

[0056] In a possible implementation, step S3 comprises:

[0057] Take 20-35 parts of perhydrogenated polysilazane solution and 25 parts of the first dispersion liquid to mix, then add 50 parts of n-butyl ether and 0.05-0.2 parts of leveling agent, and use an ultrasonic homogenizer to disperse, specifically, a 100ml ultrasonic homogenizer can be used, disperse at a power of 450w for 35s, to obtain the second dispersion liquid.

[0058] In a possible implementation, the solvent of the perhydrogenated polysilazane solution is n-butyl ether, and the concentration of the n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%.

[0059] In a possible implementation, the leveling agent is perfluoro-octyl betaine or perfluoro-alkyl betaine.

[0060] In the embodiments of the present application, the perhydrogenated polysilazane is used as a film-forming agent. After the perhydrogenated polysilazane is fully cured, it has high density, high hardness, and good adhesion to the substrate. By adding high-hardness nanoparticles such as zirconium dioxide, silicon carbide, boron carbide, titanium carbide, and silicon nitride into the perhydrogenated polysilazane, the wear resistance and water resistance of the material are further increased.

[0061] Perfluorooctylbetaine or perfluoroalkylbetaine is used as a leveling agent, which plays a small amount of surfactant, enhances hydrophilicity to a certain extent, and does not introduce other functional groups to cause special adsorption of the material due to its double-sparse perfluoroalkyl or double-sparse perfluorooctyl and hydrophilic betaine group.

[0062] The second dispersion liquid is prepared by using n-butyl ether as a solvent, which is different from the dispersion liquid of xylene used in the prior art, is more environmentally friendly, and has high food safety.

[0063] S4. Obtain a substrate, activate and clean the surface of the substrate, and obtain a pretreated substrate.

[0064] In one possible implementation, the substrate is glass, and step S4 includes:

[0065] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20 min, take out and dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120 s to obtain a pretreated substrate.

[0066] S5. Submerge the pretreated substrate in the second dispersion liquid, uniformly pull out the pretreated substrate from the second dispersion liquid, and obtain a base coating by standing.

[0067] In one possible implementation, in step S5, the pretreated substrate is submerged in the second dispersion liquid for 180 min, and the uniform pulling speed is 3 mm / s.

[0068] S6. Perform wet drying and then dry drying on the base coating to obtain a target wear-resistant and stain-resistant coating.

[0069] In one possible implementation, in step S6, the wet drying of the base coating includes placing the base coating in a drying box, and placing a preset mass of water in the drying box; the wet drying condition is a humidity of 90% or more, normal pressure of 150 DEG C, and drying time of 2 h. The dry drying of the base coating includes placing the base coating in a drying box at 30 DEG C, and drying for 0.5 h.

[0070] In the embodiment of the present application, the water of the preset quality can be set to 200g, and a wide-mouth beaker is placed in a drying oven. The drying oven is in a vacuum state, and the drying is performed at 150°C under normal pressure for 2h, and the humidity is kept above 90%. The wet drying under high humidity is because the full-hydrogen polysilazane needs oxygen and water to fully hydrolyze during the curing process, and ammonia and hydrogen are released to form a dense silicon oxide structure. In the hydrolysis process, polytitanate is also hydrolyzed into butanol and titanium oxide, and a large amount of titanium hydroxyl is formed in the hydrolysis process. These titanium hydroxyls link to PHPS to form Si-O-Ti structure, Zr-O-Ti structure, and Sn-O-Ti structure, or Zr-O-Si structure, SN-O-Si structure, and Si-O-C structure. A large amount of such entity structures can cause the nanoparticles to be well compounded on the full-hydrogen polysilazane to form a stable covalent structure of silicon, zirconium, titanium, and oxygen, thereby increasing the uniformity and stability of the coating.

[0071] In another aspect, the present application provides a wear-resistant and stain-resistant coating prepared by the method for preparing a wear-resistant and stain-resistant coating as described above.

[0072] In order to further illustrate the present application, the wear-resistant and stain-resistant coating and the method for preparing the same provided by the present application are described in detail below in combination with examples and comparative examples, and the prepared wear-resistant and stain-resistant coating is tested.

[0073] Example 1

[0074] As shown in the following, Figure 1 the present embodiment provides a method for preparing a wear-resistant and stain-resistant coating, which comprises the following steps:

[0075] S1. Take 20 parts of tin antimony oxide powder (10nm-20nm), 5 parts of zirconium dioxide (10nm-20nm), 0.1 parts of graphene, and 0.01 parts of activated carbon powder, and put them into a ball mill. Add zirconium oxide balls (0.05mm) and stir at a speed of 180r / min for 20min. After mixing uniformly, separate the zirconium oxide balls using a 8000 mesh screen, and obtain a mixed powder. Put the mixed powder into a drying oven at 80°C, and dry for 1h. Take out the dried mixed powder and put it into a plasma cleaning machine. Pass oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to obtain a nano-activated powder.

[0076] S2. Take 0.2 parts of polytitanate and 3 parts of nano-activated powder, and add them to 93 parts of n-butyl ether solvent with stirring at a speed of 200r / min for 30min. Mix uniformly, and use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s. The nano-activated powder can be fully dispersed to form a first dispersion liquid.

[0077] S3. Take 20 parts of perhydropolysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydropolysilazane solution is n-butyl ether, the concentration of the n-butyl ether solvent in the perhydropolysilazane solution is 20%, then add 50 parts of n-butyl ether and 0.05 parts of perfluoroalkyl betaine, use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s to obtain a second dispersion liquid.

[0078] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, mix them by stirring, then pour them into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean it for 20min, take it out and wipe it dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean it for 120s to obtain a pretreated substrate.

[0079] S5. Immers the pretreated substrate in the second dispersion liquid for 180min, pull the pretreated substrate out of the second dispersion liquid at a uniform speed of 3mm / s, and stand to obtain a base coating.

[0080] S6. Put the base coating into a drying oven, put a wide-mouth beaker containing 200g of water into the drying oven, keep the humidity in the drying oven above 90%, the atmospheric pressure is 150℃, and the drying time is 2h, then put the base coating into a drying oven at 30℃ and dry it for 0.5h to obtain a target wear-resistant and stain-resistant coating.

[0081] Test the wear-resistant and stain-resistant coating prepared in this example, and the test indicators include water contact angle, oil contact angle, hardness, coating adhesion, surface morphology, hydrophilic angle after water bubble for 240h, friction resistance (oleophobic angle after reciprocating friction of 100g loaded steel wool for 16000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0082] Example 2

[0083] S1. Take 5 parts of tin antimony oxide powder (10nm-20nm), 20 parts of zirconium dioxide (10nm-20nm), 0.1 parts of graphene and 0.01 parts of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05mm), stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after uniform mixing, and obtain a mixed powder; put the mixed powder into a drying oven at 80℃ and dry it for 1h; put the dried mixed powder into a plasma cleaning machine, pass oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to obtain a nano-activated powder.

[0084] S2. Take 2.1 parts of polytitanate and 8 parts of nano-activated powder, add them into 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min to mix uniformly, and use a 100-ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, so that the nano-activated powder can be fully dispersed to form a first dispersion liquid.

[0085] S3. Take 35 parts of a perhydrogenated polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydrogenated polysilazane solution is n-butyl ether, and the concentration of the n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%, and then add 50 parts of n-butyl ether and 0.2 parts of perfluoroalkyl betaine, use a 100-ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, to obtain a second dispersion liquid.

[0086] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20 min, take out and dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120 s to obtain a pretreated substrate.

[0087] S5. Immersing the pretreated substrate in the second dispersion liquid for 180 min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3 mm / s, and standing to obtain a base coating.

[0088] S6. Placing the base coating into a drying oven, placing a wide-mouth beaker containing 200 g of water into the drying oven, keeping the humidity in the drying oven above 90%, and drying at 150℃ under normal pressure for 2 h, then placing the base coating into a drying oven at 30℃ and drying for 0.5 h to obtain a target wear-resistant and stain-resistant coating.

[0089] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indexes included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, friction resistance (oleophobic angle after reciprocating friction of 100 g loaded steel wool for 21000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0090] Example 3

[0091] S1. Take 10 parts of antimony tin oxide powder (10nm-20nm), 10 parts of zirconium dioxide (10nm-20nm), 0.1 parts of graphene and 0.05 parts of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05mm), stir at 180r / min for 20min, and after mixing evenly, separate the zirconium oxide balls using an 8000-mesh sieve to obtain mixed powder; put the mixed powder into a drying oven at 80℃ and dry for 1h; put the dried mixed powder into a plasma cleaner, pass oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder with a power of 500w for 600s to obtain nano-activated powder.

[0092] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, add them to 93 parts of n-butyl ether solvent while stirring, stir at 200 r / min for 30 min to mix evenly, and use a 100 ml ultrasonic homogenizer at 450 W power for 35 s to fully disperse the nano-activated powder and form the first dispersion.

[0093] S3. Take 25 parts of perhydropolysilazane solution and 25 parts of the first dispersion, wherein the solvent of the perhydropolysilazane solution is n-butyl ether and the concentration percentage of n-butyl ether solvent in the perhydropolysilazane solution is 20%. Then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine. Use a 100ml ultrasonic homogenizer to disperse for 35s at a power of 450w to obtain the second dispersion.

[0094] S4. Take 20 parts water, 2 parts hydrogen peroxide, 5 parts ethanol and 1 part sodium dodecyl sulfate, stir and mix them, then pour them into an ultrasonic cleaner. Put the glass into the ultrasonic cleaner and clean for 20 minutes. Take it out and wipe it dry with degreased cotton. Put the dried glass into a plasma cleaner and clean for 120 seconds to obtain the pretreated substrate.

[0095] S5. Immerse the pretreated substrate in the second dispersion for 180 min, then pull the pretreated substrate out of the second dispersion at a uniform speed of 3 mm / s and let it stand to obtain the base coating.

[0096] S6. Place the base coating in a drying oven, and put 200g of water in a wide-mouth beaker into the drying oven. Maintain the humidity in the drying oven above 90%, at normal pressure and 150℃ for 2 hours. Then place the base coating in a drying oven at 30℃ and dry for 0.5 hours to obtain the target wear-resistant and stain-resistant coating.

[0097] The wear-resistant and anti-fouling coating prepared in this embodiment was tested. The test indicators included water contact angle, oil contact angle, hardness, coating adhesion, appearance morphology, hydrophilic angle after soaking in water for 240 hours, abrasion resistance (oil repellency angle after 18,000 cycles of reciprocating friction with 100g load steel wool), and sesame oil floating effect. The test results are shown in Table 1.

[0098] Example 4

[0099] S1. Take 10 parts of tin antimony oxide powder (10nm-20nm), 10 parts of silicon carbide (20nm-30nm), 0.1 parts of graphene and 0.05 parts of activated carbon powder, put them into a ball mill; add zirconium oxide balls (0.05mm), stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after mixing evenly, and get the mixed powder; put the mixed powder into a drying oven at 80℃, dry for 1h and take out; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to get nano-activated powder.

[0100] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200r / min for 30min, mix evenly, and use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0101] S3. Take 25 parts of perhydrogenated polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydrogenated polysilazane solution is n-butyl ether, the concentration of n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%, and then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine, use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, to get a second dispersion liquid.

[0102] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120s to get a pretreated substrate.

[0103] S5. Immersing the pretreated substrate in the second dispersion liquid for 180min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3mm / s, and standing to get a basic coating.

[0104] S6. Put the basic coating into a drying oven, put a wide-mouth beaker containing 200g of water into the drying oven, keep the humidity in the drying oven above 90%, normal pressure, 150℃, dry for 2h, then put the basic coating into a drying oven at 30℃, dry for 0.5h to get a target wear-resistant and stain-resistant coating.

[0105] The abrasion-resistant and stain-resistant coating prepared in this example was tested, and the test indexes included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, friction resistance (oleophobic angle after reciprocating friction of 100 g loaded steel wool for 20,000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0106] Example 5

[0107] S1. Take 10 parts of tin antimony oxide powder (10 nm-20 nm), 10 parts of boron carbide (30 nm-50 nm), 0.1 parts of graphene, and 0.05 parts of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05 mm), stir at a speed of 180 r / min for 20 min, separate the zirconium oxide balls using a 8000 mesh screen after uniform mixing, and obtain a mixed powder; put the mixed powder into a drying oven at 80°C, dry for 1 h, and take out; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1 L / min, and clean the mixed powder at a power of 500 w for 600 s to obtain a nano-activated powder.

[0108] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, and add them to 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min, mix uniformly, and use a 100 ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0109] S3. Mix 25 parts of perhydro-polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydro-polysilazane solution is n-butyl ether, and the concentration percentage of the n-butyl ether solvent in the perhydro-polysilazane solution is 20%, then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine, use a 100 ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, and obtain a second dispersion liquid.

[0110] S4. Mix 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate by stirring, pour into an ultrasonic cleaning machine, put glass into the ultrasonic cleaning machine for cleaning for 20 min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120 s to obtain a pretreated substrate.

[0111] S5. Immersing the pretreated substrate in the second dispersion liquid for 180 min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3 mm / s, and standing to obtain a basic coating.

[0112] S6. Put the base coating into a drying oven, use a wide-mouth beaker to hold 200g of water, keep the humidity in the drying oven above 90%, normal pressure, 150°C, dry for 2h, then put the base coating into a drying oven at 30°C, dry for 0.5h, to obtain the target wear-resistant and stain-resistant coating.

[0113] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indicators included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240h, friction resistance (oleophobic angle after reciprocating friction of 100g loaded steel wool for 19000 times), castor oil floating effect, and the test results are shown in Table 1.

[0114] Example 6

[0115] S1. Take 10 parts of tin antimony oxide powder (10nm-20nm), 10 parts of titanium carbide (30nm-50nm), 0.1 parts of graphene, and 0.05 parts of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05mm), stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after mixing evenly, to obtain a mixed powder; put the mixed powder into a drying oven at 80°C, dry for 1h and take out; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s, to obtain a nano-activated powder.

[0116] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, and add them into 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200r / min for 30min, mix evenly, and use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0117] S3. Mix 25 parts of perhydro-polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydro-polysilazane solution is n-butyl ether, and the concentration percentage of n-butyl ether solvent in the perhydro-polysilazane solution is 20%, then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine, use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, to obtain a second dispersion liquid.

[0118] S4. Mix 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120s, to obtain a pretreated substrate.

[0119] S5. Submerge the pretreated substrate in the second dispersion liquid for 180 min, pull out the pretreated substrate from the second dispersion liquid at a uniform speed of 3 mm / s, and obtain a base coating layer by standing.

[0120] S6. Put the base coating layer into a drying oven, put a wide-mouth beaker containing 200 g of water into the drying oven, keep the humidity in the drying oven above 90%, and bake at 150 ℃ under normal pressure for 2 h. Then, put the base coating layer into a drying oven at 30 ℃, and bake for 0.5 h to obtain a target wear-resistant and stain-resistant coating layer.

[0121] The wear-resistant and stain-resistant coating layer prepared in this example is tested, and the test indexes include water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, oil-repellent angle after reciprocating friction of 100 g loaded steel wool for 18,000 times, sesame oil floating effect, and the test results are shown in Table 1.

[0122] Example 7

[0123] S1. Put 10 parts of tin antimony oxide powder (10 nm-20 nm), 10 parts of silicon nitride (20 nm-30 nm), 0.1 part of graphene, and 0.05 part of activated carbon powder into a ball mill; add zirconium oxide balls (0.05 mm), stir at a speed of 180 r / min for 20 min, separate the zirconium oxide balls using a 8000-mesh screen after uniform mixing, and obtain a mixed powder; put the mixed powder into a drying oven at 80 ℃, and bake for 1 h; and take out the baked mixed powder, put it into a plasma cleaning machine, pass oxygen with a humidity of 15%±5% at a flow rate of 1 L / min, and clean the mixed powder at a power of 500 w for 600 s to obtain a nano-activated powder.

[0124] S2. Put 1 part of polytitanate and 5 parts of nano-activated powder into 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min, mix uniformly, and use a 100-ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, so that the nano-activated powder can be fully dispersed to form a first dispersion liquid.

[0125] S3. Mix 25 parts of perhydro-polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydro-polysilazane solution is n-butyl ether, the concentration percentage of the n-butyl ether solvent in the perhydro-polysilazane solution is 20%, and then add 50 parts of n-butyl ether and 0.1 part of perfluorooctyl betaine, use a 100-ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, and obtain a second dispersion liquid.

[0126] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20 min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120 s to obtain a pretreated substrate.

[0127] S5. Immersing the pretreated substrate in the second dispersion liquid for 180 min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3 mm / s, and standing to obtain a base coating.

[0128] S6. Placing the base coating into a drying oven, using a wide-mouth beaker to hold 200 g of water into the drying oven, keeping the humidity in the drying oven above 90%, normal pressure, 150℃, drying time 2 h, then placing the base coating into a drying oven at 30℃, drying for 0.5 h to obtain a target wear-resistant and stain-resistant coating.

[0129] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indicators included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, friction resistance (oleophobic angle after reciprocating friction of 100 g load steel wool for 22000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0130] Comparative Example 1

[0131] S1. Take 10 parts of zirconium dioxide (10 nm-20 nm), 0.1 parts of graphene and 0.05 parts of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05 mm), stir at a speed of 180 r / min for 20 min, separate the zirconium oxide balls using a 8000 mesh screen after uniform mixing, and obtain a mixed powder; put the mixed powder into a drying oven at 80℃ and dry for 1 h; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1 L / min, and clean the mixed powder at a power of 500 w for 600 s to obtain a nano-activated powder.

[0132] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min, mix uniformly, and use a 100 ml ultrasonic homogenizer to disperse for 35 s at a power of 450 w, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0133] S3. Take 25 parts of the perhydrogenated polysilazane solution, wherein the solvent of the perhydrogenated polysilazane solution is n-butyl ether, and the concentration of the n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%, and 25 parts of the first dispersion liquid, and then add 50 parts of n-butyl ether and 0.1 part of perfluorooctyl betaine, and use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s to obtain a second dispersion liquid.

[0134] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, mix them by stirring, pour them into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean it for 20min, take it out and wipe it dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean it for 120s to obtain a pretreated substrate.

[0135] S5. Immersing the pretreated substrate in the second dispersion liquid for 180min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3mm / s, and standing to obtain a base coating.

[0136] S6. Placing the base coating into a drying oven, using a wide-mouth beaker to hold 200g of water into the drying oven, keeping the humidity in the drying oven above 90%, normal pressure, 150℃, drying for 2h, then placing the base coating into a drying oven at 30℃, drying for 0.5h to obtain a target wear-resistant and stain-resistant coating.

[0137] The wear-resistant and stain-resistant coating prepared in this example is tested, and the test indexes include water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240h, friction resistance (oleophobic angle after reciprocating friction of 100g loaded steel wool for 17000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0138] Comparative Example 2

[0139] S1. Take tin antimony oxide powder (10nm-20nm), 0.1 part of graphene and 0.05 part of activated carbon powder, and put them into a ball mill; add zirconium oxide balls (0.05mm) and stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after uniform mixing, to obtain a mixed powder; put the mixed powder into a drying oven at 80℃ and dry for 1h; take out the dried mixed powder and put it into a plasma cleaning machine, pass oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to obtain a nano-activated powder.

[0140] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200 r / min for 30 min, mix uniformly, and use a 100 ml ultrasonic homogenizer to disperse at a power of 450 w for 35 s, so that the nano-activated powder can be fully dispersed to form a first dispersion liquid.

[0141] S3. Take 25 parts of perhydrogenated polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydrogenated polysilazane solution is n-butyl ether, the concentration of n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%, and then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine, use a 100 ml ultrasonic homogenizer to disperse at a power of 450 w for 35 s, to obtain a second dispersion liquid.

[0142] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20 min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120 s to obtain a pretreated substrate.

[0143] S5. Immersing the pretreated substrate in the second dispersion liquid for 180 min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3 mm / s, and standing to obtain a base coating.

[0144] S6. Put the base coating into a drying oven, put a wide-mouth beaker containing 200 g of water into the drying oven, keep the humidity in the drying oven above 90%, and bake at 150℃ under normal pressure for 2 h, then put the base coating into a drying oven at 30℃ and bake for 0.5 h to obtain a target wear-resistant and stain-resistant coating.

[0145] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indexes included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, friction resistance (oleophobic angle after reciprocating friction of 100 g loaded steel wool for 13000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0146] Comparative Example 3

[0147] S1. Take 10 parts of tin antimony oxide powder (10nm-20nm), 10 parts of zirconium dioxide (10nm-20nm), 0.1 parts of graphene, and put them into a ball mill; add zirconium oxide balls (0.05mm), stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after mixing uniformly, and obtain a mixed powder; put the mixed powder into a drying oven at 80℃, dry for 1h, and take out; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to obtain a nano-activated powder.

[0148] S2. Take 5 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200r / min for 30min, mix uniformly, and use a 100ml ultrasonic homogenizer to disperse for 35s at a power of 450w, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0149] S3. Mix 25 parts of perhydro-polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydro-polysilazane solution is n-butyl ether, and the concentration percentage of n-butyl ether solvent in the perhydro-polysilazane solution is 20%, then add 50 parts of n-butyl ether and 0.1 parts of perfluorooctyl betaine, and use a 100ml ultrasonic homogenizer to disperse for 35s at a power of 450w to obtain a second dispersion liquid.

[0150] S4. Stir and mix 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, pour into an ultrasonic cleaning machine, put glass into the ultrasonic cleaning machine and clean for 20min, take out and wipe dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120s to obtain a pretreated substrate.

[0151] S5. Immersing the pretreated substrate in the second dispersion liquid for 180min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3mm / s, and standing to obtain a basic coating.

[0152] S6. Put the basic coating into a drying oven, put a wide-mouth beaker containing 200g of water into the drying oven, keep the humidity in the drying oven above 90%, and bake at 150℃ under normal pressure for 2h, then put the basic coating into a drying oven at 30℃ and bake for 0.5h to obtain a target wear-resistant and stain-resistant coating.

[0153] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indicators included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240h, friction resistance (oleophobic angle after reciprocating friction of 10000 times with 100g load steel wool), and sesame oil floating effect. The test results are shown in Table 1.

[0154] Comparative Example 4

[0155] S1. Take 10 parts of tin antimony oxide powder (10nm-20nm), 10 parts of zirconium dioxide (10nm-20nm), 0.1 parts of graphene and 0.05 parts of activated carbon powder into a ball mill; add zirconium oxide balls (0.05mm), stir at a speed of 180r / min for 20min, separate the zirconium oxide balls using a 8000 mesh screen after mixing evenly, and obtain a mixed powder; put the mixed powder into a drying oven at 80°C, dry for 1h and take out; put the dried mixed powder into a plasma cleaning machine, pass in oxygen with a humidity of 15%±5% at a flow rate of 1L / min, and clean the mixed powder at a power of 500w for 600s to obtain a nano-activated powder.

[0156] S2. Take 1 part of polytitanate and 5 parts of nano-activated powder, add 93 parts of n-butyl ether solvent with stirring, stir at a speed of 200r / min for 30min, mix evenly, and use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, which can fully disperse the nano-activated powder to form a first dispersion liquid.

[0157] S3. Mix 25 parts of perhydrogenated polysilazane solution and 25 parts of the first dispersion liquid, wherein the solvent of the perhydrogenated polysilazane solution is n-butyl ether, the concentration of n-butyl ether solvent in the perhydrogenated polysilazane solution is 20%, and then add 50 parts of n-butyl ether, use a 100ml ultrasonic homogenizer to disperse at a power of 450w for 35s, and obtain a second dispersion liquid.

[0158] S4. Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol and 1 part of sodium dodecyl sulfate, stir and mix, then pour into an ultrasonic cleaning machine, put the glass into the ultrasonic cleaning machine and clean for 20min, take out and dry with absorbent cotton; put the dried glass into a plasma cleaning machine and clean for 120s to obtain a pretreated substrate.

[0159] S5. Immersing the pretreated substrate in the second dispersion liquid for 180min, pulling out the pretreated substrate from the second dispersion liquid at a uniform speed of 3mm / s, and standing to obtain a basic coating.

[0160] S6. Put the basic coating into a drying oven, put a wide-mouth beaker containing 200g of water into the drying oven, keep the humidity in the drying oven above 90%, normal pressure, 150°C, dry for 2h, then put the basic coating into a drying oven at 30°C and dry for 0.5h to obtain a target wear-resistant and stain-resistant coating.

[0161] The wear-resistant and stain-resistant coating prepared in this example was tested, and the test indexes included water contact angle, oil contact angle, hardness, coating adhesion, apparent morphology, hydrophilic angle after water bubble for 240 h, friction resistance (oleophobic angle after reciprocating friction of 100 g loaded steel wool for 11000 times), sesame oil floating effect, and the test results are shown in Table 1.

[0162] Table 1

[0163]

[0164]

[0165] From the analysis of each example and the comparative example in Table 1, it can be seen that the addition of high-hardness nanoparticles can greatly increase the wear resistance of the coating, and different nanoparticles added in different mass fractions also have different effects on wear resistance. Among them, silicon nitride greatly increases the wear resistance of the material. In addition to the high hardness of silicon nitride itself, it also shows that the specific gravity of silicon nitride is relatively light, the dispersion degree in the perhydro-polysilazane coating is high, the distribution is uniform, and the nanoparticles have excellent compatibility with perhydro-polysilazane. The nanoparticles are not easy to loosen and fall off during friction. It also shows that the perhydro-polysilazane after curing has high hardness and still has certain toughness. Different characteristics of different nanoparticles will also have a weak influence on the hydrophilicity of the coating. Zirconium dioxide itself has good hydrophilicity, so the coating with zirconium dioxide has better hydrophilicity. Other materials also have relatively good hydrophilicity because a certain amount of titanium oxide is produced after the hydrolysis of polytitanate.

[0166] Without the addition of antistatic agent of tin antimony oxide, the coating has strong electrostatic adsorption, the viscosity of sesame oil is relatively high, and it is relatively difficult to float on the general hydrophilic surface. However, after the addition of tin antimony oxide, the floating speed of sesame oil is relatively fast, which also proves that the antistatic effect of tin antimony oxide and the obvious improvement of the easy cleaning effect of the coating on oil stains.

[0167] Without the addition of activated carbon and polytitanate, it is difficult for the material to form a dispersed form with small particle size in the coating. With the addition of carbon element activation and polytitanate as a dispersant, the dispersion effect is good. Without good dispersion effect, the overall friction resistance and water resistance of the coating are very poor.

[0168] The addition of the leveling agent makes the appearance of the coating better and has better transparency. This is because the addition of the perfluoroalkyl benzalkonium chloride or perfluoroalkyl benzalkonium chloride increases the wettability of the coating to the nanoparticles, so that the nanoparticles have better wrapping and smaller particle size. At the same time, it can be better dispersed, (after the number of nanoparticles is reduced, the wavelength of visible light is sufficient to bypass the nanoparticles, and the entire coating will show a more transparent color), which can also be seen from the abrasion resistance. After the addition of the leveling agent, the flowability and wettability of the coating are enhanced, and the surface after coating is relatively smooth, and the coating has better performance.

[0169] The above description has fully disclosed the specific embodiments of the present application. It should be pointed out that any modification of the specific embodiments of the present application made by those skilled in the art does not deviate from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the foregoing specific embodiments.

Claims

1. A method for preparing a wear-resistant and stain-resistant coating, characterized in that, Includes the following steps: S1. Tin antimony oxide powder, nanoparticles, graphene and activated carbon powder are mixed, and then a grinding medium is added and mixed evenly. The grinding medium is then separated, and the resulting mixed powder is dried and activated to obtain nano-activated powder. The nanoparticles include one of zirconium dioxide, silicon carbide, boron carbide, titanium carbide and silicon nitride. S2. Polytitanate and the activated powder are added to n-butyl ether solvent while stirring, and the mixture is stirred and dispersed to obtain a first dispersion; S3. After mixing the perhydropolysilazane solution with the first dispersion, n-butyl ether and a leveling agent are added, mixed, and dispersed to obtain a second dispersion; the leveling agent is perfluoroalkyl betaine; S4. Obtain a substrate, perform activation treatment and plasma cleaning on the surface of the substrate to obtain a pretreated substrate; S5. Immerse the pretreated substrate in the second dispersion, pull the pretreated substrate out of the second dispersion at a uniform speed, and let it stand to obtain the base coating; S6. The base coating is wet-baked and then dry-baked to obtain the target wear-resistant and stain-resistant coating; wherein, the wet-baking of the base coating includes: placing the base coating in a drying oven and placing a preset mass of water in the drying oven; the wet-baking conditions are humidity above 90%, normal pressure 150℃, and drying time 2h.

2. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, The grinding media includes zirconia balls, and step S1 includes: S11. Take 5-20 parts of the above-mentioned antimony tin oxide powder, 5-20 parts of the above-mentioned nanoparticles, 0.1 parts of the above-mentioned graphene, and 0.01-0.1 parts of the above-mentioned activated carbon powder, and put them into a ball mill; S12. Add the zirconia balls and stir at 180 r / min for 20 min. After mixing evenly, separate the zirconia balls to obtain the mixed powder. S13. Place the mixed powder in a drying oven at 80°C and dry for 1 hour before removing it; S14. The dried mixed powder is placed in a plasma cleaner, and oxygen with a humidity of 15%±5% is introduced at a flow rate of 1L / min to clean the mixed powder and obtain the nano-activated powder.

3. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, The antimony tin oxide powder has a size of 10nm-20nm; the nanoparticles have a size of 10nm-50nm; and the zirconium oxide spheres have a size of 0.05mm.

4. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, Step S2 includes: Take 0.2-2.1 parts of the polytitanate and 3-8 parts of the nano-activated powder, add them to 93 parts of n-butyl ether solvent while stirring, stir at 200 r / min for 30 min to mix evenly, and disperse using an ultrasonic homogenizer to obtain the first dispersion.

5. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, Step S3 includes: taking 20-35 parts of the perhydropolysilazane solution and 25 parts of the first dispersion, mixing them, then adding 50 parts of n-butyl ether and 0.05-0.2 parts of leveling agent, and dispersing them using an ultrasonic homogenizer to obtain the second dispersion.

6. The method for preparing the wear-resistant and stain-resistant coating according to claim 5, characterized in that, The solvent of the perhydropolysilazane solution is n-butyl ether, and the concentration percentage of n-butyl ether solvent in the perhydropolysilazane solution is 20%.

7. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, The substrate is glass, and step S4 includes: Take 20 parts water, 2 parts hydrogen peroxide, 5 parts ethanol and 1 part sodium dodecyl sulfate, stir and mix them, then pour them into an ultrasonic cleaner. Put the glass into the ultrasonic cleaner and clean it for 20 minutes. Take it out and wipe it dry. The dried glass is placed in a plasma cleaner and cleaned for 120 seconds to obtain the pretreated substrate.

8. The method for preparing the wear-resistant and stain-resistant coating according to claim 1, characterized in that, In step S5, the pretreated substrate is immersed in the second dispersion for 180 minutes, and the uniform lifting speed is 3 mm / s.

9. The method for preparing a wear-resistant and stain-resistant coating according to claim 1, characterized in that, In step S6, drying the base coating includes placing the base coating in a drying oven at 30°C and drying it for 0.5 hours.

10. A wear-resistant and stain-resistant coating, characterized in that, It is prepared by the method for preparing the wear-resistant and stain-resistant coating according to any one of claims 1 to 9.

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