Environmentally friendly transparent ceramic coating, preparation method thereof, and application in simulated ceramics

Abstract

The present invention belongs to the field of simulated ceramics and ceramic coatings, and specifically discloses an environmentally friendly transparent ceramic coating, a preparation method thereof, and an application in simulated ceramics. The environmentally friendly transparent ceramic coating is formed by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1-2; the aqueous phase comprises deionized water, acrylic resin, lithium tantalate nanoparticles, a dispersant, tripolyphosphate, and a defoamer; and the inorganic nano-ceramic emulsion comprises composite nano-oxide particles, nanofiber fillers, an emulsifier, and deionized water. The raw materials and preparation process of the coating disclosed in the present invention are green, environmentally friendly, and non-toxic. The coating has good adhesion, hardness, and weather resistance, is transparent in color, and is suitable for coating on simulated ceramics, achieving a texture and performance similar to ceramics while reducing production costs.

Description

Technical Field

[0001] The invention belongs to the field of simulated ceramics and ceramic coatings, and specifically discloses an environmentally friendly transparent ceramic coating, a preparation method thereof, and application in simulated ceramics. Background Art

[0002] Ceramic coatings were first produced using the sol-gel method, which emerged in the 1960s. First proposed by German researchers, coatings are one of its most important applications. This is because sol-gel technology can form a three-dimensional gel network structure from a liquid solution on a variety of substrates at relatively low temperatures, creating a solid film with a wide range of chemical compositions. Water-based ceramic coatings are resistant to water, alcohol, abrasion, scratches, and high temperatures, and can achieve a film hardness of 4H-6H.

[0003] CN102898913A discloses a water-based inorganic zinc-rich paint, which is made by mixing components A and B in a weight ratio of 4:1. Component A includes 30-32% 500-mesh spherical / flaky zinc powder, 30-32% 800-mesh spherical / flaky zinc powder, 30-32% 1250-mesh spherical / flaky zinc powder, 6-8% nano-cerium dioxide, and 2-4% 800-mesh talc. Component B includes 38-50% potassium silicate, 10-20% lithium silicate, 8-10% potassium titanate whiskers, 5-12% water-based self-drying silicone-modified acrylic resin, 0.2-0.5% defoamer, 0.5-1% wetting agent, and 12-20% water. This paint has drawbacks such as a complex production process, low film hardness, insufficient wear resistance, and a long drying time, which affect the product's overall performance and large-scale use.

[0004] CN201811073380.6 discloses a room temperature curing super weather resistant, high hardness and wear resistant water-based inorganic nano ceramic coating and its preparation method, the inorganic nano ceramic coating includes a water-based inorganic nano ceramic coating, a water-based organosilicon dispersion and water, wherein the raw materials of the water-based inorganic nano ceramic coating include a water-based inorganic nano ceramic emulsion, a pigment, a filler, a wetting dispersant, a non-stick leveling agent, a thickener and water, the water-based inorganic nano ceramic emulsion includes a silica sol, a silane, a surfactant and water, and the water-based organosilicon dispersion includes an aminosilane, a surfactant and water. The preparation method is to uniformly mix the water-based inorganic nano ceramic coating and the water-based organosilicon dispersion in a weight ratio of 1 to 4:1, i.e., to obtain a room temperature curing super weather resistant, high hardness and wear resistant water-based inorganic nano ceramic coating. However, the above invention requires the use of a variety of surfactants and silanes that are harmful to the human body, and the environmental protection effect is not good. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses an environmentally friendly transparent ceramic coating, a preparation method thereof, and application in simulated ceramics.

[0006] The technical solutions of the present invention are as follows:

[0007] An environmentally friendly transparent ceramic coating, which is made by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1-2;

[0008] The aqueous phase is made from the following raw materials in parts by weight:

[0009]

[0010] The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight:

[0011]

[0012] The composite nano-oxide particles are formed by mixing nano-aluminum oxide, nano-zirconium oxide and nano-lanthanum oxide, and the content of the nano-lanthanum oxide in the composite nano-oxide particles is not less than 60%.

[0013] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the composite nano-oxide particles contain 5-15% of nano-aluminum oxide, 10-35% of nano-zirconium oxide and 60%-85% of nano-lanthanum oxide, calculated by mass fraction.

[0014] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the composite nano-oxide particles contain 10% nano-aluminum oxide, 25% nano-zirconium oxide and 65% nano-lanthanum oxide, calculated by mass fraction.

[0015] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the average particle size of the lithium tantalate nanoparticles and the composite nano-oxide particles is ≤50 nm.

[0016] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the dispersant is selected from butyl stearate.

[0017] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the defoaming agent is selected from polyether modified silicone oil.

[0018] Furthermore, in the above-mentioned environmentally friendly transparent ceramic coating, the nanofiber filler is composed of 10-40% zinc oxide nanowires and 60-90% silicon carbide whiskers, calculated by mass fraction.

[0019] Furthermore, the preparation method of the above-mentioned environmentally friendly transparent ceramic coating comprises the following steps:

[0020] Separately prepare an aqueous phase and an inorganic nano-ceramic emulsion, and fully mix them at a mass ratio of 2:1-2 at room temperature;

[0021] The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase;

[0022] The inorganic nano-ceramic emulsion is prepared by the following method: firstly preparing composite nano-oxide particles meeting the particle size requirements and fully mixing them, then adding the composite nano-oxide particles and emulsifier into deionized water and fully stirring them, and finally adding the emulsifier and further fully stirring them.

[0023] Furthermore, the above-mentioned environmentally friendly transparent ceramic coating is used in the preparation of a ceramic coating, wherein the coating is applied on the surface of a simulated ceramic material, and the coating is 1-5 layers.

[0024] Furthermore, the application of the above-mentioned environmentally friendly transparent ceramic coating in the preparation of a ceramic coating comprises the following steps:

[0025] The environmentally friendly transparent ceramic coating is heated to 160℃-200℃, and is sprayed layer by layer onto the surface of the simulated ceramic material using a spray gun at a speed of 40-60s per layer. The surface thickness formed by each spraying is less than 10μm, and finally a ceramic coating is obtained. The ceramic coating is then baked at a high temperature of 250-300℃ for 15-30 minutes and naturally cooled to room temperature.

[0026] Compared with the existing technology, the present invention has the following advantages: the ceramic coating disclosed in the present invention is prepared by carefully blending composite nano-oxide particles to form an inorganic nano-ceramic emulsion and combining it with a corresponding aqueous phase. The coating has good transparency, UV resistance, good wear resistance, high hardness, and high adhesion and waterproof effect when applied on simulated ceramics. In addition, the ceramic coating prepared by the present invention is green and environmentally friendly, has a gentle preparation process, low preparation cost, low equipment requirements, and is easy to promote and popularize. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 QUV (h) ultraviolet weathering performance test of the coatings of Examples 1-3 and Comparative Examples 1-5;

[0028] Figure 2 RCA paper tape abrasion resistance (times) test of the coatings of Examples 1-3 and Comparative Examples 1-5;

[0029] Figure 3 This is a test of the hardness (H) of the coatings of Examples 1-3 and Comparative Examples 1-5. DETAILED DESCRIPTION

[0030] An environmentally friendly transparent ceramic coating, which is made by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1-2;

[0031] The aqueous phase is made from the following raw materials in parts by weight:

[0032]

[0033]

[0034] The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight:

[0035]

[0036] The composite nano-oxide particles are formed by mixing nano-aluminum oxide, nano-zirconium oxide and nano-lanthanum oxide, and the content of the nano-lanthanum oxide in the composite nano-oxide particles is not less than 60%;

[0037] Preferably, the composite nano-oxide particles contain 5-15% nano-aluminum oxide, 10-35% nano-zirconium oxide, and 60%-85% nano-lanthanum oxide, calculated by mass fraction.

[0038] Preferably, calculated by mass fraction, the composite nano-oxide particles contain 10% nano-aluminum oxide, 25% nano-zirconium oxide and 65% nano-lanthanum oxide.

[0039] Preferably, the average particle size of the lithium tantalate nanoparticles and composite nano-oxide particles is ≤50 nm;

[0040] Preferably, the dispersant is selected from butyl stearate;

[0041] Preferably, the defoaming agent is selected from polyether modified silicone oil;

[0042] Preferably, the nanofiber filler is composed of 10-40% zinc oxide nanowires and 60-90% silicon carbide whiskers, calculated by mass fraction;

[0043] Furthermore, the preparation method of the environmentally friendly transparent ceramic coating comprises the following steps:

[0044] Separately prepare an aqueous phase and an inorganic nano-ceramic emulsion, and fully mix them at a mass ratio of 2:1-2 at room temperature;

[0045] The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase;

[0046] The inorganic nano-ceramic emulsion is prepared by the following method: firstly preparing composite nano-oxide particles meeting the particle size requirements and fully mixing them, then adding the composite nano-oxide particles and emulsifier into deionized water and fully stirring them, and finally adding the emulsifier and further fully stirring them.

[0047] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] The reagents or instruments used in the examples of the present invention without indicating the manufacturer are all conventional reagent products that can be obtained through commercial purchase.

[0049] The acrylic resin is Japanese Mitsubishi DIANAL BR-106;

[0050] Tripolyphosphate is sodium tripolyphosphate;

[0051] The emulsifier was alkylphenol polyoxyethylene ether polyoxypropylene ether emulsifier No. 11 (Lushun Chemical Plant);

[0052] Polyether-modified silicone oil was purchased from Shandong Xiangzhao New Materials Co., Ltd. (CLV06031);

[0053] The nano-alumina in the embodiment has a crystal form of γ-Al2O3 and an average particle size of 20 nm. It has a high specific surface area, is inert and resistant to high temperatures, is highly active, and is an activated alumina. It is porous, has high hardness, and good dimensional stability.

[0054] The nano zirconium oxide in the embodiment is of model VK-R50Y1, crystalline phase 3Y tetragonal phase, and average particle size 50nm; it has the characteristics of strong thermal shock resistance, high temperature resistance, good chemical stability, and outstanding material compositeness;

[0055] The nano-lanthanum oxide in the embodiment has an average particle size of 40 nm.

[0056] Example 1

[0057] An environmentally friendly transparent ceramic coating, which is made by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1.5;

[0058] The aqueous phase is made from the following raw materials in parts by weight:

[0059]

[0060] The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight:

[0061]

[0062] Calculated by mass fraction, the composite nano-oxide particles contain 5% nano-aluminum oxide, 10% nano-zirconium oxide and 85% nano-lanthanum oxide;

[0063] The average particle size of the lithium tantalate nanoparticles and composite nano-oxide particles is ≤50nm;

[0064] The dispersant is selected from butyl stearate;

[0065] The defoaming agent is selected from polyether modified silicone oil;

[0066] Calculated by mass fraction, the nanofiber filler consists of 10% zinc oxide nanowires and 90% silicon carbide whiskers;

[0067] The preparation method of the environmentally friendly transparent ceramic coating comprises the following steps:

[0068] A water phase and an inorganic nano-ceramic emulsion are prepared separately and fully mixed at a mass ratio of 2:1.5 at room temperature;

[0069] The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase;

[0070] The inorganic nano-ceramic emulsion is prepared by the following method: firstly preparing composite nano-oxide particles meeting the particle size requirements and fully mixing them, then adding the composite nano-oxide particles and emulsifier into deionized water and fully stirring them, and finally adding the emulsifier and further fully stirring them.

[0071] Example 2

[0072] An environmentally friendly transparent ceramic coating, which is made by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1.5;

[0073] The aqueous phase is made from the following raw materials in parts by weight:

[0074]

[0075]

[0076] The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight:

[0077]

[0078] Calculated by mass fraction, the composite nano-oxide particles contain 10% of nano-aluminum oxide, 25% of nano-zirconium oxide and 65% of nano-lanthanum oxide.

[0079] The average particle size of the lithium tantalate nanoparticles and composite nano-oxide particles is ≤50nm;

[0080] The dispersant is selected from butyl stearate;

[0081] The defoaming agent is selected from polyether modified silicone oil;

[0082] Calculated by mass fraction, the nanofiber filler consists of 25% zinc oxide nanowires and 75% silicon carbide whiskers;

[0083] The preparation method of the environmentally friendly transparent ceramic coating comprises the following steps:

[0084] A water phase and an inorganic nano-ceramic emulsion are prepared separately and fully mixed at a mass ratio of 2:1.5 at room temperature;

[0085] The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase;

[0086] The inorganic nano-ceramic emulsion is prepared by the following method: firstly preparing composite nano-oxide particles meeting the particle size requirements and fully mixing them, then adding the composite nano-oxide particles and emulsifier into deionized water and fully stirring them, and finally adding the emulsifier and further fully stirring them.

[0087] Example 3

[0088] An environmentally friendly transparent ceramic coating, which is made by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1.5;

[0089] The aqueous phase is made from the following raw materials in parts by weight:

[0090]

[0091]

[0092] The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight:

[0093]

[0094] Calculated by mass fraction, the composite nano-oxide particles contain 5% nano-aluminum oxide, 35% nano-zirconium oxide, and 60% nano-lanthanum oxide;

[0095] The average particle size of the lithium tantalate nanoparticles and composite nano-oxide particles is ≤50nm;

[0096] The dispersant is selected from butyl stearate;

[0097] The defoaming agent is selected from polyether modified silicone oil;

[0098] Calculated by mass fraction, the nanofiber filler consists of 40% zinc oxide nanowires and 60% silicon carbide whiskers;

[0099] The preparation method of the environmentally friendly transparent ceramic coating comprises the following steps:

[0100] Separately prepare an aqueous phase and an inorganic nano-ceramic emulsion, and fully mix them at a mass ratio of 2:1-2 at room temperature;

[0101] The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase;

[0102] The inorganic nano-ceramic emulsion is prepared by the following method: firstly preparing composite nano-oxide particles meeting the particle size requirements and fully mixing them, then adding the composite nano-oxide particles and emulsifier into deionized water and fully stirring them, and finally adding the emulsifier and further fully stirring them.

[0103] Comparative Example 1

[0104] The composite nano-oxide particles consist of 50% nano-aluminum oxide and 50% nano-zirconium oxide, and the rest is the same as in Example 2.

[0105] Comparative Example 2

[0106] The composite nano-oxide particles are composed of 50% nano-aluminum oxide and 50% nano-lanthanum oxide, and the rest are the same as in Example 2.

[0107] Comparative Example 3

[0108] The composite nano-oxide particles are composed of 50% nano-aluminum oxide and 50% nano-lanthanum oxide, and the rest are the same as in Example 2.

[0109] Comparative Example 4

[0110] The nanofiber filler is not contained, and the other parts are the same as those in Example 2.

[0111] Comparative Example 5

[0112] Commercially available KNM22 acid and alkali resistant anti-corrosion ceramic coating was purchased from Beijing Naimer Technology Co., Ltd.

[0113] Test Example 1

[0114] The coatings prepared in Examples 1-3 and Comparative Examples 1-5 were subjected to performance tests. All tests were conducted in accordance with national standards or industry standards and were applied to simulated ceramic materials (imitation ceramic bowls made by mixing, forming, and calcining clay or a mixture containing clay); the test items included transparency (subjective), adhesion (grade), QUV (h) UV weathering resistance, RCA paper tape abrasion resistance (times), hardness (H), and water contact angle (degrees).

[0115] The results are shown in Table 1 and Appendix Figure 1-3 shown.

[0116] Table 1 Performance test

[0117]

[0118] Based on the above test results, the following conclusions can be drawn: The ceramic coating disclosed in the present invention is prepared by carefully blending composite nano-oxide particles to form an inorganic nano-ceramic emulsion and combining it with a corresponding aqueous phase. The coating has good transparency, UV resistance, good wear resistance, high hardness, and high adhesion and waterproof effect when coated on simulated ceramics. In addition, the ceramic coating prepared by the present invention is green and environmentally friendly, has a gentle preparation process, low preparation cost, low equipment requirements, and is easy to promote and popularize.

[0119] The above are only a limited number of preferred embodiments of the present invention, and their description is relatively specific and detailed, but it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and such modifications and improvements are within the scope of protection of the present invention.

Claims

1. Application of an environmentally friendly transparent ceramic coating in the preparation of a ceramic coating, characterized in that: The environmentally friendly transparent ceramic coating is prepared by mixing an aqueous phase and an inorganic nano-ceramic emulsion in a mass ratio of 2:1.5; The aqueous phase is made from the following raw materials in parts by weight: The inorganic nano-ceramic emulsion is made from the following raw materials in parts by weight: Calculated by mass fraction, the composite nano-oxide particles contain 10% nano-aluminum oxide, 25% nano-zirconium oxide, and 65% nano-lanthanum oxide; The average particle size of the lithium tantalate nanoparticles and composite nano-oxide particles is ≤50nm; The dispersant is selected from butyl stearate; The defoaming agent is selected from polyether modified silicone oil; Calculated by mass fraction, the nanofiber filler consists of 25% zinc oxide nanowires and 75% silicon carbide whiskers; The preparation method of the environmentally friendly transparent ceramic coating comprises the following steps: A water phase and an inorganic nano-ceramic emulsion are prepared separately and fully mixed at a mass ratio of 2:1.5 at room temperature; The aqueous phase is prepared by the following method: dissolving a formulated amount of acrylic resin in deionized water, then adding tripolyphosphate and stirring thoroughly, adding a dispersant, a defoaming agent, and lithium tantalate nanoparticles, and continuing to stir to prepare the aqueous phase; The coating is applied on the surface of the simulated ceramic material, and the coating has 1 to 5 layers, comprising the following steps: The environmentally friendly transparent ceramic coating is heated to 160℃-200℃, and is sprayed layer by layer onto the surface of the simulated ceramic material using a spray gun at a speed of 40-60s per layer. The surface thickness formed by each spraying is less than 10μm, and finally a ceramic coating is obtained. The ceramic coating is then baked at a high temperature of 250-300℃ for 15-30 minutes and naturally cooled to room temperature.

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