Hydrophobic olephobic epoxy paint and its preparation and application method

Abstract

The invention provides a hydrophobic olephobic epoxy paint and its preparation and application method. The paint is prepared by mixing the following raw materials according to the mass ratio of epoxy paint for color coding: fluorine-silicon copolymer: a mixed solvent: nanometer silica: a curing agent = 1.0 : 0.005-0.12 : 0.5-3.0 : 0-0.30 : 0.01-0.25. An epoxy coating formed by the paint has a microscopic rough structure, overcomes the disadvantage of poor compatibility of an epoxy paint modified by a fluorine-silicon material, and has a water contact angle of 149 degrees and an oil contact angle of 101 degrees, being an epoxy coating with strong hydrophobicity and olephobicity.

Description

technical field

[0001] The invention belongs to the technical field of preparation of low surface energy epoxy coatings, in particular to a hydrophobic and oleophobic epoxy coating and a preparation method thereof. technical background

[0002] Epoxy coatings are known to dominate protective coatings due to their excellent corrosion protection, chemical resistance, excellent adhesion to numerous substrates and good flexibility. However, epoxy resin contains a large number of hydroxyl groups (Ye Shoufu. Review of anti-corrosion coatings (on). Shanghai Paint, 2000, (3): 25-28), which makes the surface show strong adsorption performance, which greatly affects Development and application of high performance epoxy coatings.

[0003] In recent years, based on the revelation of self-cleaning bionic surfaces in nature, people have launched research on the preparation of new functional materials and surface structures of special materials. Nowadays, there are many methods for prepa...

Examples

Embodiment 1

[0029] 1. Preparation and characterization of fluorine-containing acrylate-vinyltriethoxysilane-styrene copolymer:

[0030] Add 0.04 g of sodium dodecyl sulfate (SDS), 0.08 g of nonylphenol polyoxyethylene ether (OP-10), 1.5 ml of tetrafluoropropanol, 1.5 ml of n-butanol, 3.0 gram of perfluoroalkyl ethyl acrylate (FA), 0.6 gram of vinyltriethoxysilane (VTES), 2.4 gram of styrene (St), 35 gram of distilled water, pre-emulsified at 45°C for 30 minutes to obtain a pre-emulsion . The temperature of the system was raised to 75° C., and 0.06 g of azobisisobutyronitrile (AIBN) was added to react for 4 hours. After the reaction, use ethanol or saline to break the emulsification; the product is suction filtered, washed with water, and dried under vacuum at 50°C to obtain a perfluoroalkylethylacrylate-vinyltriethoxysilane-styrene copolymer.

[0031] Characterization of Copolymers:

[0032] 3400cm -1 It is the Si-OH peak produced by the hydrolysis of vinyltriethoxysilane; 3062cm -1 ...

Embodiment 2

[0049] Except that the nano silicon dioxide consumption is 0.12 gram, other are all the same as embodiment 1.

[0050] The contact angle of the obtained modified epoxy coating to water is 142°, and the contact angle to oil is 95°, indicating that the hydrophobic and oleophobic properties of the epoxy coating have been greatly improved.

Embodiment 3

[0052] Except that the nano silicon dioxide consumption is 0.10 gram, other are all the same as embodiment 1.

[0053] The contact angle of the obtained modified epoxy coating to water is 127°, and the contact angle to oil is 80°, indicating that the hydrophobic and oleophobic properties of the epoxy coating have been improved.

technical field

[0001] The invention belongs to the technical field of preparation of low surface energy epoxy coatings, in particular to a hydrophobic and oleophobic epoxy coating and a preparation method thereof. technical background

[0002] Epoxy coatings are known to dominate protective coatings due to their excellent corrosion protection, chemical resistance, excellent adhesion to numerous substrates and good flexibility. However, epoxy resin contains a large number of hydroxyl groups (Ye Shoufu. Review of anti-corrosion coatings (on). Shanghai Paint, 2000, (3): 25-28), which makes the surface show strong adsorption performance, which greatly affects Development and application of high performance epoxy coatings.

[0003] In recent years, based on the revelation of self-cleaning bionic surfaces in nature, people have launched research on the preparation of new functional materials and surface structures of special materials. Nowadays, there are many methods for prepa...

Examples

Embodiment 1

[0029] 1. Preparation and characterization of fluorine-containing acrylate-vinyltriethoxysilane-styrene copolymer:

[0030] Add 0.04 g of sodium dodecyl sulfate (SDS), 0.08 g of nonylphenol polyoxyethylene ether (OP-10), 1.5 ml of tetrafluoropropanol, 1.5 ml of n-butanol, 3.0 gram of perfluoroalkyl ethyl acrylate (FA), 0.6 gram of vinyltriethoxysilane (VTES), 2.4 gram of styrene (St), 35 gram of distilled water, pre-emulsified at 45°C for 30 minutes to obtain a pre-emulsion . The temperature of the system was raised to 75° C., and 0.06 g of azobisisobutyronitrile (AIBN) was added to react for 4 hours. After the reaction, use ethanol or saline to break the emulsification; the product is suction filtered, washed with water, and dried under vacuum at 50°C to obtain a perfluoroalkylethylacrylate-vinyltriethoxysilane-styrene copolymer.

[0031] Characterization of Copolymers:

[0032] 3400cm -1 It is the Si-OH peak produced by the hydrolysis of vinyltriethoxysilane; 3062cm -1 ...

Embodiment 2

[0049] Except that the nano silicon dioxide consumption is 0.12 gram, other are all the same as embodiment 1.

[0050] The contact angle of the obtained modified epoxy coating to water is 142°, and the contact angle to oil is 95°, indicating that the hydrophobic and oleophobic properties of the epoxy coating have been greatly improved.

Embodiment 3

[0052] Except that the nano silicon dioxide consumption is 0.10 gram, other are all the same as embodiment 1.

[0053] The contact angle of the obtained modified epoxy coating to water is 127°, and the contact angle to oil is 80°, indicating that the hydrophobic and oleophobic properties of the epoxy coating have been improved.

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