Organic-inorganic silicon modified polyurethane super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor mechanical properties of polyurethane coatings, low durability of super-hydrophobic properties, and poor wear resistance, and achieve high mechanical properties. Strength and chemical resistance, avoid wear and tear easily, reduce friction effect

Pending Publication Date: 2019-12-27
姚国江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides an organic-inorganic silicon modified polyurethane superhydrophobic coating and its preparation method, which not only provides a simple and easy-to-operate superhydrophobic polyurethane coating preparation process, but also solves the problem of polyurethane The mechanical properties of the coating are poor and the wear resistance is not good, which makes the coating easy to wear and tear, resulting in the problem of low durability of superhydrophobic properties

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of organic-inorganic silicon modified polyurethane superhydrophobic coating comprises the following steps:

[0024] (1) Preparation of modified nano-SiO 2 : Add 200-600mL of absolute ethanol to the reaction bottle, then add 5 parts of octadecyltriethoxysilane and 4 parts of nano silicon dioxide in sequence and stir evenly, slowly add sodium hydroxide to adjust the pH of the solution while stirring at a constant speed to 8-9, transfer the solution into the hydrothermal synthesis reaction kettle, and place it in an oven, heat it to 120-130°C for 6-8 hours, after the reaction is completed, it will be easily cooled to room temperature and filtered to remove the solvent, and then use an appropriate amount of anhydrous The solid product was washed with ethanol and distilled water, and fully dried to obtain octadecyltriethoxysilane-modified nano-SiO 2 .

[0025] (2) Preparation of modified nano-SiO 2 Loaded aminated carbon nanotubes: add 200-800mL of ...

Embodiment 1

[0029] (1) Preparation of modified nano-SiO 2 : Add 200mL of absolute ethanol to the reaction bottle, then add 5 parts of octadecyl triethoxysilane and 4 parts of nano silicon dioxide in turn and stir evenly, slowly add sodium hydroxide while stirring at a constant speed to adjust the pH of the solution to 8 , transfer the solution into a hydrothermal synthesis reaction kettle, place it in an oven, heat it to 120°C for 6 hours, cool it to room temperature after the reaction and filter to remove the solvent, wash the solid product with an appropriate amount of absolute ethanol and distilled water in sequence, and Fully dried to obtain octadecyltriethoxysilane modified nano-SiO 2 Material 1.

[0030] (2) Preparation of modified nano-SiO 2 Loaded aminated carbon nanotubes: Add 24 parts of carbon nanotubes and the modified nano-SiO prepared in the above step (1) to 200mL distilled water in the reaction kettle 2 Material 1, put the reaction kettle in an oven and heat it to 80°C ...

Embodiment 2

[0034] (1) Preparation of modified nano-SiO 2 : Add 200mL of absolute ethanol to the reaction bottle, then add 5.5 parts of octadecyltriethoxysilane and 4.5 parts of nano-silica in turn and stir evenly, slowly add sodium hydroxide while stirring at a constant speed to adjust the pH of the solution to 8 , transfer the solution into a hydrothermal synthesis reaction kettle, place it in an oven, heat it to 125°C for 6 hours, cool it to room temperature after the reaction and filter to remove the solvent, wash the solid product with appropriate amount of absolute ethanol and distilled water in sequence, and Fully dried to obtain octadecyltriethoxysilane modified nano-SiO 2 Material 2.

[0035] (2) Preparation of modified nano-SiO 2 Loaded aminated carbon nanotubes: Add 300mL distilled water to the reaction kettle, then add 20 parts of carbon nanotubes and the modified nano-SiO 2 Material 2, put the reaction kettle in an oven and heat it to 85°C for 3 hours. After the reaction, ...

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Abstract

The invention relates to the technical field of polyurethane super-hydrophobic coatings and discloses an organic-inorganic silicon modified polyurethane super-hydrophobic coating and a preparation method thereof, wherein the coating is prepared from the following formula raw materials: octadecyltriethoxysilane, nano silicon dioxide, carbon nanotubes, a curing agent, isophorone diisocyanate, 1,5-pentanediol, dimethylolpropionic acid, hydroxyl-terminated polysiloxane silicone oil, a neutralizer and hydrazine hydrate. The invention discloses an organic-inorganic silicon modified polyurethane super-hydrophobic coating and a preparation method thereof, wherein the organic silicon dihydroxyl-terminated polysiloxane silicone oil is used as a chain extender to prepare modified polyurethane; compared with the prior art, the polyurethane coating contains a large amount of hydrophobic groups methyl and alkane chains, the hydrophobic performance of polyurethane is greatly enhanced, SiO2 and carbonnanotubes have high chemical inertness and good mechanical properties and mechanical properties, the chemical stability and toughness of the polyurethane coating are improved, and the phenomenon thatthe coating is prone to loss and falling off in the long-time use process is avoided.

Description

technical field [0001] The invention relates to the technical field of polyurethane superhydrophobic coatings, in particular to an organic-inorganic silicon modified polyurethane superhydrophobic coating and a preparation method thereof. Background technique [0002] A self-cleaning surface is a superhydrophobic surface on which pollutants on the surface can automatically fall off under the action of gravity or rain. Surface hydrophobic technology is widely used in people's daily life. By designing coatings with different chemical and physical characteristics, it can Provide new functions and functions for solid materials. Super-hydrophobic coating is a new type of coating with special surface properties. The smooth surface of the coating film has a contact angle with water greater than 150°, and the contact angle hysteresis is less than 5°. Super-hydrophobic coating has waterproof, Anti-snow, anti-pollution, anti-adhesion, anti-oxidation and self-cleaning have great applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/62C08G18/61C08G18/65C08G18/34C08G18/32
CPCC08G18/3206C08G18/348C08G18/61C08G18/6541C08K2201/011C09D175/04C09D7/62C08K13/06C08K9/06C08K9/12C08K3/36C08K3/041
Inventor 姚国江
Owner 姚国江
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