Method for preparing self-cleaning fluorocarbon paint

A fluorocarbon paint, self-cleaning technology, applied in biocide-containing paints, anti-fouling/underwater coatings, etc., can solve the problem that the surface of fluorocarbon paint is easy to be stained, and achieve good chemical stability and low surface free energy , good dispersion, low surface energy effect

Inactive Publication Date: 2018-01-26
袁玲燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a preparation method...

Method used

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  • Method for preparing self-cleaning fluorocarbon paint

Examples

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example 1

[0023]Mix 200mL of absolute ethanol with 100mL of 2% perfluorooctyltriethoxysilane aqueous solution to obtain a siloxane solution, adjust the pH of the siloxane solution to 3.0 with 60% acetic acid by mass fraction, and dissolve the silicon Pour the oxane solution into a beaker, stir and mix with a magnetic stirrer at a speed of 300r / min for 22 hours to obtain a hydrolyzed fluorosilane solution; prepare a titanium dioxide ethanol mixture with a mass concentration of 4 mg / mL, mix the titanium dioxide ethanol mixture with the hydrolyzed The fluorosilane solution was mixed at a volume ratio of 4:1, placed in a beaker, stirred and mixed with a magnetic stirrer at a speed of 400r / min for 7h, then placed in a high-speed centrifuge at a speed of 4200r / min for 10min, and the upper layer was removed. solution, separated to obtain the lower precipitate, put the lower precipitate into a vacuum drying oven with a set temperature of 80 °C, and dry for 12 h to obtain surface-modified titaniu...

example 2

[0025] Mix 210mL of absolute ethanol with 110mL of 2% perfluorooctyltriethoxysilane aqueous solution to obtain a siloxane solution, adjust the pH of the siloxane solution to 3.1 with 60% acetic acid, and dissolve the silicon Pour the oxane solution into a beaker, stir and mix with a magnetic stirrer at a speed of 310r / min for 23 hours to obtain a hydrolyzed fluorosilane solution; prepare a titanium dioxide ethanol mixture with a mass concentration of 4 mg / mL, mix the titanium dioxide ethanol mixture with the hydrolyzed The fluorosilane solution was mixed at a volume ratio of 4:1, placed in a beaker, stirred and mixed with a magnetic stirrer at a speed of 420r / min for 7.5h, and then placed in a high-speed centrifuge at a speed of 4300r / min for 11min to remove The upper layer was separated to obtain the lower precipitate, and the lower precipitate was placed in a vacuum drying oven with a set temperature of 82 °C, and dried for 13 hours to obtain surface-modified titanium dioxide...

example 3

[0027] Mix 220mL of absolute ethanol with 120mL of 2% perfluorooctyltriethoxysilane aqueous solution to obtain a siloxane solution, adjust the pH of the siloxane solution to 3.3 with 60% acetic acid by mass fraction, and Pour the oxane solution into a beaker, stir and mix with a magnetic stirrer at a speed of 320r / min for 24 hours to obtain a hydrolyzed fluorosilane solution; prepare a titanium dioxide ethanol mixture with a mass concentration of 4 mg / mL, mix the titanium dioxide ethanol mixture with The hydrolyzed fluorosilane solution was mixed at a volume ratio of 4:1, placed in a beaker, stirred and mixed with a magnetic stirrer at a speed of 450r / min for 8 hours, and then placed in a high-speed centrifuge at a speed of 4500r / min for 12min. Remove the upper liquid, separate the lower precipitate, put the lower precipitate into a vacuum drying oven with a set temperature of 85 °C, and dry for 14 h to obtain surface-modified titanium dioxide nanoparticles; toluene, isophorone...

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Abstract

The invention discloses a method for preparing self-cleaning fluorocarbon paint, belonging to the technical field of coatings. The method disclosed by the invention comprises the following steps: mixing hydrolytic fluorosilane and titanium dioxide, and dispersing at high speed to obtain surface-modified titanium dioxide nano-particles; and mixing varnish and carbon nano-tube dispersion, and micro-curing, thereby obtaining the self-cleaning fluorocarbon paint. The binding effect between the titanium dioxide particles and fluorocarbon resins is increased by the fluorosilane, fluorosilane molecules are hydrolyzed under acidic conditions, the hydrolyzed fluorosilane molecules are adsorbed onto the surfaces of the titanium dioxide nano-particles due to hydrogen-bond interactions, and since carbon chains in the fluorosilane molecules are protected by a fluorine atom space barrier effect, other atoms difficultly intrude. Therefore, the fluorosilane has excellent chemical stability and low surface free energy. Due to a coating layer on the fluorosilane surface, Vander Wale force of the TiO2 nano-particles to water and the hydrogen-bond interaction are reduced, and the contact angle on thecoating surface is greatly enlarged, so that super-hydrophobicity is achieved, the stain resistance can be obviously improved, and the application prospects are wide.

Description

technical field [0001] The invention discloses a preparation method of self-cleaning fluorocarbon paint, which belongs to the technical field of paint preparation. Background technique [0002] Fluorocarbon coatings refer to coatings with fluororesin as the main film-forming substance; also known as fluorocarbon coatings, fluorine coatings, fluororesin coatings, etc. Among all kinds of coatings, fluororesin coatings have particularly superior properties due to the high electronegativity of the introduced fluorine element and strong carbon-fluorine bond energy. Weather resistance, heat resistance, low temperature resistance, chemical resistance, and has unique non-stick and low friction properties. After decades of rapid development, fluorine coatings have been widely used in various fields such as construction, chemical industry, electrical and electronic industry, machinery industry, aerospace industry, and household goods. It has become the coating brand with the highest...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D5/16C09D7/61C09D7/63
Inventor 袁玲燕何俊欣陈莉莉
Owner 袁玲燕
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