Super-hydrophobic and oleophobic nano self-cleaning coating and preparation method thereof

Abstract

The invention relates to the technical field of nano coatings, and discloses a super-hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, the super-hydrophobic and oleophobic nano self-cleaning coating comprises the following raw materials by weight: 20-30 parts of a rice particle aqueous solution; 8-10 parts of a fluorine-containing polymer; 4.8 to 25.1 parts of an auxiliary agent; 30 to 40 parts of water; the nanoparticle aqueous solution comprises the following raw materials in parts by weight: 15-20 parts of nanoparticles, 80-100 parts of water, 0.8-1 part of a dispersing agent and 0.5-1 part of a wetting agent; the fluorine-containing polymer is poly (hexafluorobutyl methacrylate); the dispersing agent is one of dibutyl naphthalene sulfonate, diisopropyl naphthalene sulfonate or isopropyl naphthalene sulfonate. According to the super-hydrophobic and oleophobic nano self-cleaning coating and the preparation method thereof, through the bactericide, the lubricating grease, the wetting agent and the dispersing agent, the breeding of bacteria is effectively killed or inhibited, the lubricating grease composite coating with excellent hydrophobicity and lipophilicity is provided, meanwhile, the grinding and dispersing efficiency can be improved, the grinding time can be shortened, and the stability of the quality of a coating product can be improved; the adhesive force to a building material is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of nano coatings, in particular to a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof. Background Art

[0002] Nanomaterials have good adhesion and long coating life. Nanomaterials have special properties such as surface effect, small size effect, optical effect, quantum size effect, macro quantum size effect, etc., which can give coatings new functions. Therefore, nano coatings have gradually emerged in the coating industry. Nano coatings are generally composed of nano materials and organic coatings. They are prepared using nano-level monomer slurry and nano emulsion, nano color paste, nano bactericide, nano multifunctional additives, etc. Compared with existing coatings, their comprehensive performance and quality are much better than similar products. The double-repellent nano self-cleaning coatings on the current market use the double-repellent mechanism of nano materials to effectively discharge the moisture of the coating and prevent the invasion of external moisture, so that the coating has the performance of breathing. At the same time, the physical principle of the super double interface of nano materials is used to effectively discharge the invasion of dust and oil, so that the wall has good self-cleaning function. As the efficacy of nano coatings increases, the cost is also high, and the strength of the coating and the stability of the coating are relatively poor.

[0003] To this end, we propose a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, which solves the problems existing in the existing nano coatings as mentioned in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, comprising the following raw materials in the following weight proportions:

[0008] 20-30 parts of rice particle aqueous solution;

[0009] 8-10 parts of fluorine-containing polymer;

[0010] Additives 4.8-25.1 parts;

[0011] 30-40 parts of water.

[0012] Preferably, the raw material composition and weight ratio of the nanoparticle aqueous solution are: 15-20 parts of nanoparticles, 80-100 parts of water, 0.8-1 part of dispersant, and 0.5-1 part of wetting agent.

[0013] Preferably, the fluorine-containing polymer is polyhexafluorobutyl methacrylate.

[0014] Preferably, the raw material composition of the additive and its weight ratio are: 0.5-1 part of bactericide, 0.5-0.8 part of defoamer, 1.2-1.6 parts of antifreeze, 2-3 parts of film-forming aid, 0.1-0.5 part of fluorocarbon surfactant, 0.5-2 parts of hydrophobic additive, 0.2-0.8 parts of pH adjuster, 5-10 parts of porous powder quartz (1250 mesh), 0.5-2 parts of thickener, and 30-50 parts of grease.

[0015] Preferably, the dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate.

[0016] Preferably, the defoaming agent is polyether-modified dimethylsiloxane.

[0017] A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating comprises the following steps:

[0018] S1: First put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, PH regulator in turn, stir for 5-10 minutes, then add porous quartz powder and stir and mix, and control the mixer speed at about 600r / min;

[0019] S2: Add nanoparticles, film-forming aid, wetting agent, bactericide, fluorocarbon surfactant, hydrophobic aid, and grease, continue stirring for 20 minutes, then turn off the mixer and stop stirring.

[0020] S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add a thickener and stir for 20 minutes, then stop the machine and fill it to complete the production.

[0021] Preferably, the raw material ratios in S1 are: dispersant 0.8-1, defoamer 0.5-0.8, pH regulator 0.2-0.8, porous quartz powder 5-10.

[0022] Preferably, the raw material ratios in S2 are: 15-20 nanoparticles, 2-3 film-forming aids, 0.5-1 wetting agent, 0.5-1 bactericide, 0.1-0.5 fluorocarbon surfactant, 0.5-2 hydrophobic aid, and 30-50 grease.

[0023] Preferably, the raw material ratios in S3 are: thickener 0.5-2.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, which has the following beneficial effects:

[0026] 1. The super hydrophobic and oleophobic nano self-cleaning coating and its preparation method, by using porous powder quartz, are used to prepare coatings and are not prone to precipitation; since the nano-mesopores on its surface can be better combined with coating additives, it helps to improve adhesion and cohesion. On the other hand, it increases its cross-linking and reinforcement effects, that is, increases the physical and mechanical properties of the product, the tensile strength of the coating film, and the adhesion and cohesion to the collective, and at the same time reduces the cost in coating production.

[0027] 2. The super hydrophobic and oleophobic nano self-cleaning coating and its preparation method, by adding a bactericide to form an antibacterial coating, can destroy the cell membranes of Escherichia coli, Staphylococcus aureus, etc., thereby effectively killing or inhibiting the reproduction of bacteria. At the same time, grease is combined with hydrophobic and oleophobic nano coatings, and a grease composite coating with excellent hydrophobic and oleophilic properties is formed by brushing, rolling, etc. The addition of a wetting agent and a dispersant can improve the efficiency of grinding and dispersion, shorten the grinding time, and is beneficial to improving the stability of the quality of the coating product and enhancing the adhesion to building materials. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] This embodiment provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, comprising the following raw materials in proportion by weight:

[0031] 20 parts of rice particle aqueous solution;

[0032] 8 parts of fluorinated polymer;

[0033] 4.8 parts of additives;

[0034] 30 parts water.

[0035] In this embodiment, the raw material composition of the nanoparticle aqueous solution and its weight ratio are: 15 parts of nanoparticles, 80 parts of water, 0.8 parts of dispersant, and 0.5 parts of wetting agent.

[0036] In this embodiment, the fluorine-containing polymer is polyhexafluorobutyl methacrylate.

[0037] In this embodiment, the raw material composition of the additives and their weight ratios are: 0.5 parts of bactericide, 0.5 parts of defoaming agent, 1.2 parts of antifreeze agent, 2 parts of film-forming aid, 0.1 parts of fluorocarbon surfactant, 0.5 parts of hydrophobic additive, 0.2 parts of pH adjuster, 5 parts of porous powder quartz (1250 mesh), 0.5 parts of thickener, and 30 parts of grease.

[0038] In this embodiment, the dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate, and the defoaming agent is polyether-modified dimethylsiloxane.

[0039] A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating comprises the following steps:

[0040] S1: First put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, PH regulator in turn, stir for 5-10 minutes, then add porous quartz powder and stir and mix. The mixer speed is controlled at about 600r / min. The raw material ratios are: dispersant 0.8, defoamer 0.5, PH regulator 0.2, porous quartz powder 5;

[0041] S2: Add nanoparticles, film-forming aid, wetting agent, bactericide, fluorocarbon surfactant, hydrophobic aid and grease and continue stirring for 20 minutes, then turn off the mixer and stop stirring. The raw material ratios are: nanoparticles 15, film-forming agent 2, wetting agent 0.5, bactericide 0.5, fluorocarbon surfactant 0.1, hydrophobic aid 0.5, grease 30.

[0042] S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add thickener and stir for 20 minutes, then stop the machine and fill. The production is completed. The raw material ratios are: thickener 0.5.

[0043] The present invention forms an antibacterial coating by adding a bactericide to the coating, which can destroy the cell membranes of Escherichia coli, Staphylococcus aureus and the like, thereby effectively killing or inhibiting the reproduction of bacteria. At the same time, the grease is combined with the hydrophobic and oleophobic nano coating, and a grease composite coating with excellent hydrophobic and oleophilic properties is formed by brushing, rolling and other methods. The addition of a wetting agent and a dispersant can improve the efficiency of grinding and dispersion, shorten the grinding time, and is beneficial to improving the stability of the quality of the coating product and enhancing the adhesion to building materials. At the same time, the use of porous powder quartz is used for preparing the coating, and precipitation is not easy to occur; because the nano-mesopores on its surface can be better combined with the coating additive, it is helpful to improve the adhesion and adhesion. On the other hand, its cross-linking and reinforcement effects are increased, that is, the physical and mechanical properties of the product, the tensile strength of the coating film and the adhesion and adhesion to the collective are increased, and at the same time, the cost is reduced in the production of the coating.

[0044] Embodiment 2:

[0045] This embodiment provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, comprising the following raw materials in proportion by weight:

[0046] 25 parts of rice particle aqueous solution;

[0047] 8.5 parts of fluorine-containing polymer;

[0048] 8 parts of additives;

[0049] 30 parts water.

[0050] In this embodiment, the raw material composition of the nanoparticle aqueous solution and its weight ratio are: 18 parts of nanoparticles, 85 parts of water, 0.8 parts of dispersant, and 0.5 parts of wetting agent.

[0051] In this embodiment, the fluorine-containing polymer is poly(hexafluorobutyl methacrylate).

[0052] In this embodiment, the raw material composition of the additives and their weight ratios are: 0.5 parts of bactericide, 0.5 parts of defoaming agent, 1.2 parts of antifreeze agent, 2 parts of film-forming aid, 0.2 parts of fluorocarbon surfactant, 0.5 parts of hydrophobic additive, 0.2 parts of pH adjuster, 5 parts of porous powder quartz (1250 mesh), 0.5 parts of thickener, and 35 parts of grease.

[0053] In this embodiment, the dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate, and the defoaming agent is polyether-modified dimethylsiloxane.

[0054] A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating comprises the following steps:

[0055] S1: First, put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, and pH regulator in turn, stir for 5-10 minutes, and then add porous quartz powder to mix. The speed of the mixer is controlled at about 600r / min. The raw material ratios are: dispersant 0.8, defoamer 0.5, pH regulator 0.2, porous quartz powder 5;

[0056] S2: Add nanoparticles, film-forming aid, wetting agent, bactericide, fluorocarbon surfactant, hydrophobic aid and grease and continue stirring for 20 minutes, then turn off the mixer and stop stirring. The raw material ratios are: nanoparticles 18, film-forming agent 2, wetting agent 0.5, bactericide 0.5, fluorocarbon surfactant 0.2, hydrophobic aid 0.5, grease 35.

[0057] S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add thickener and stir for 20 minutes, then stop the machine and fill. The production is completed. The raw material ratios are: thickener 0.5.

[0058] The present invention forms an antibacterial coating by adding a bactericide to the coating, which can destroy the cell membranes of Escherichia coli, Staphylococcus aureus and the like, thereby effectively killing or inhibiting the reproduction of bacteria. At the same time, the grease is combined with the hydrophobic and oleophobic nano coating, and a grease composite coating with excellent hydrophobic and oleophilic properties is formed by brushing, rolling and other methods. The addition of a wetting agent and a dispersant can improve the efficiency of grinding and dispersion, shorten the grinding time, and is beneficial to improving the stability of the quality of the coating product and enhancing the adhesion to building materials. At the same time, the use of porous powder quartz is used for preparing the coating, and precipitation is not easy to occur; because the nano-mesopores on its surface can be better combined with the coating additive, it is helpful to improve the adhesion and adhesion. On the other hand, its cross-linking and reinforcement effects are increased, that is, the physical and mechanical properties of the product, the tensile strength of the coating film and the adhesion and adhesion to the collective are increased, and at the same time, the cost is reduced in the production of the coating.

[0059] Embodiment three:

[0060] This embodiment provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, comprising the following raw materials in proportion by weight:

[0061] 28 parts of rice particle aqueous solution;

[0062] 9 parts of fluorinated polymer;

[0063] 15 parts of additives;

[0064] 35 parts water.

[0065] In this embodiment, the raw material composition of the nanoparticle aqueous solution and its weight ratio are: 18 parts of nanoparticles, 90 parts of water, 0.9 parts of dispersant, and 0.6 parts of wetting agent.

[0066] In this embodiment, the fluorine-containing polymer is polyhexafluorobutyl methacrylate.

[0067] In this embodiment, the raw material composition of the additives and their weight ratios are: 0.8 parts of bactericide, 0.7 parts of defoaming agent, 1.5 parts of antifreeze agent, 3 parts of film-forming aid, 0.4 parts of fluorocarbon surfactant, 1 part of hydrophobic additive, 0.8 parts of pH adjuster, 8 parts of porous powder quartz (1250 mesh), 1.5 parts of thickener, and 40 parts of grease.

[0068] In this embodiment, the dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate, and the defoaming agent is polyether-modified dimethylsiloxane.

[0069] A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating comprises the following steps:

[0070] S1: First, put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, and pH regulator in turn, stir for 5-10 minutes, then add porous quartz powder and stir and mix. The mixer speed is controlled at about 600r / min. The raw material ratios are: dispersant 0.9, defoamer 0.7, pH regulator 0.8, porous quartz powder 8;

[0071] S2: Add nanoparticles, film-forming aids, wetting agents, bactericides, fluorocarbon surfactants, hydrophobic aids, and grease and continue stirring for 20 minutes, then turn off the mixer and stop stirring. The raw material ratios are: nanoparticles 18, film-forming aids 3, wetting agents 0.6, bactericides 0.8, fluorocarbon surfactants 0.4, hydrophobic aids 1, and grease 40.

[0072] S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add thickener and stir for 20 minutes, then stop the machine and fill. The production is completed. The raw material ratios are: thickener 1.5.

[0073] The present invention forms an antibacterial coating by adding a bactericide to the coating, which can destroy the cell membranes of Escherichia coli, Staphylococcus aureus and the like, thereby effectively killing or inhibiting the reproduction of bacteria. At the same time, the grease is combined with the hydrophobic and oleophobic nano coating, and a grease composite coating with excellent hydrophobic and oleophilic properties is formed by brushing, rolling and other methods. The addition of a wetting agent and a dispersant can improve the efficiency of grinding and dispersion, shorten the grinding time, and is beneficial to improving the stability of the quality of the coating product and enhancing the adhesion to building materials. At the same time, the use of porous powder quartz is used for preparing the coating, and precipitation is not easy to occur; because the nano-mesopores on its surface can be better combined with the coating additive, it is helpful to improve the adhesion and adhesion. On the other hand, its cross-linking and reinforcement effects are increased, that is, the physical and mechanical properties of the product, the tensile strength of the coating film and the adhesion and adhesion to the collective are increased, and at the same time, the cost is reduced in the production of the coating.

[0074] Embodiment 4:

[0075] This embodiment provides a super hydrophobic and oleophobic nano self-cleaning coating and a preparation method thereof, comprising the following raw materials in proportion by weight:

[0076] 30 parts of rice particle aqueous solution;

[0077] 10 parts of fluorine-containing polymer;

[0078] 25.1 parts of additives;

[0079] 40 parts of water.

[0080] In this embodiment, the raw material composition of the nanoparticle aqueous solution and its weight ratio are: 20 parts of nanoparticles, 100 parts of water, 1 part of dispersant, and 1 part of wetting agent.

[0081] In this embodiment, the fluorine-containing polymer is polyhexafluorobutyl methacrylate.

[0082] In this embodiment, the raw material composition of the additives and their weight ratios are: 1 part of bactericide, 0.8 parts of defoaming agent, 1.6 parts of antifreeze agent, 3 parts of film-forming aid, 0.5 parts of fluorocarbon surfactant, 2 parts of hydrophobic additive, 0.8 parts of pH adjuster, 10 parts of porous powder quartz (1250 mesh), 2 parts of thickener, and 50 parts of grease.

[0083] In this embodiment, the dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate, and the defoaming agent is polyether-modified dimethylsiloxane.

[0084] A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating comprises the following steps:

[0085] S1: First put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, PH regulator in turn, stir for 5-10 minutes, then add porous quartz powder and stir and mix. The mixer speed is controlled at about 600r / min. The raw material ratios are: dispersant 1, defoamer 0.8, PH regulator 0.8, porous quartz powder 10;

[0086] S2: Add nanoparticles, film-forming aids, wetting agents, bactericides, fluorocarbon surfactants, hydrophobic aids, and grease and continue stirring for 20 minutes, then turn off the mixer and stop stirring. The raw material ratios are: nanoparticles 20, film-forming aids 3, wetting agents 1, bactericides 1, fluorocarbon surfactants 0.5, hydrophobic aids 2, and grease 50.

[0087] S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add thickener and stir for 20 minutes, then stop the machine and fill it to complete the production. The raw material ratios are: thickener 2.

[0088] The present invention forms an antibacterial coating by adding a bactericide to the coating, which can destroy the cell membranes of Escherichia coli, Staphylococcus aureus and the like, thereby effectively killing or inhibiting the reproduction of bacteria. At the same time, the grease is combined with the hydrophobic and oleophobic nano coating, and a grease composite coating with excellent hydrophobic and oleophilic properties is formed by brushing, rolling and other methods. The addition of a wetting agent and a dispersant can improve the efficiency of grinding and dispersion, shorten the grinding time, and is beneficial to improving the stability of the quality of the coating product and enhancing the adhesion to building materials. At the same time, the use of porous powder quartz is used for preparing the coating, and precipitation is not easy to occur; because the nano-mesopores on its surface can be better combined with the coating additive, it is helpful to improve the adhesion and adhesion. On the other hand, its cross-linking and reinforcement effects are increased, that is, the physical and mechanical properties of the product, the tensile strength of the coating film and the adhesion and adhesion to the collective are increased, and at the same time, the cost is reduced in the production of the coating.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A super hydrophobic and oleophobic nano self-cleaning coating, characterized in that: The invention comprises the following raw materials in proportion by weight: 20-30 parts of rice particle aqueous solution; 8-10 parts of fluorine-containing polymer; Additives 4.8-25.1 parts; 30-40 parts of water.

2. A super hydrophobic and oleophobic nano self-cleaning coating according to claim 1, characterized in that: The raw material composition and weight ratio of the nanoparticle aqueous solution are: 15-20 parts of nanoparticles, 80-100 parts of water, 0.8-1 part of dispersant, and 0.5-1 part of wetting agent.

3. A super hydrophobic and oleophobic nano self-cleaning coating according to claim 1, characterized in that, The fluorine-containing polymer is polyhexafluorobutyl methacrylate.

4. A super hydrophobic and oleophobic nano self-cleaning coating according to claim 1, characterized in that: The raw material composition of the auxiliary agent and the weight ratio thereof are: 0.5-1 part of bactericide, 0.5-0.8 part of defoamer, 1.2-1.6 parts of antifreeze agent, 2-3 parts of film-forming auxiliary agent, 0.1-0.5 part of fluorocarbon surfactant, 0.5-2 parts of hydrophobic auxiliary agent, 0.2-0.8 parts of pH regulator, 5-10 parts of porous powder quartz (1250 mesh), 0.5-2 parts of thickener and 30-50 parts of lubricating grease.

5. A super hydrophobic and oleophobic nano self-cleaning coating according to claim 2, characterized in that, The dispersant is one of dibutylnaphthalene sulfonate, diisopropylnaphthalene sulfonate or isopropylnaphthalene sulfonate.

6. A super hydrophobic and oleophobic nano self-cleaning coating according to claim 4, characterized in that: The defoaming agent is polyether modified dimethylsiloxane;.

7. A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating, characterized in that: The following steps are involved: S1: First put an appropriate amount of water into the container, start the mixer at a low speed, and add dispersant, defoamer, PH regulator in turn, stir for 5-10 minutes, then add porous quartz powder and stir and mix, and control the mixer speed at about 600r / min; S2: Add nanoparticles, film-forming aid, wetting agent, bactericide, fluorocarbon surfactant, hydrophobic aid, and grease, continue stirring for 20 minutes, then turn off the mixer and stop stirring. S3: Grind with a sand mill and filter, put into a container equipped with a low-speed stirrer, add a thickener and stir for 20 minutes, then stop the machine and fill it to complete the production.

8. A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating according to claim 7, characterized in that: The raw material ratios in S1 are: dispersant 0.8-1, defoamer 0.5-0.8, pH regulator 0.2-0.8, porous quartz powder 5-10.

9. A method for preparing a super hydrophobic and oleophobic nano self-cleaning coating according to claim 7, characterized in that: The raw material ratios in S2 are: 15-20 nanoparticles, 2-3 film-forming aids, 0.5-1 wetting agent, 0.5-1 bactericide, 0.1-0.5 fluorocarbon surfactant, 0.5-2 hydrophobic aid, and 30-50 lubricating grease.

10. The method for preparing a super hydrophobic and oleophobic nano self-cleaning coating according to claim 7, characterized in that: The raw material ratios in S3 are: thickener 0.5-2.