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Super-hydrophobic polyurethane/ oxide nano particle hybrid coating material and preparation method thereof

A nanoparticle and coating material technology, applied in the field of superhydrophobic polyurethane/oxide nanoparticle hybrid coating and its preparation, can solve the problems of complex process, high production cost, inability to large-scale production, etc., and achieve chemical stability Good, low cost, low dielectric constant effect

Active Publication Date: 2010-09-22
JIANGSU FENGMANG COMPOUND MATERIAL SCI&TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention proposes a kind of superhydrophobic polyurethane / oxide nanoparticle hybrid coating material, another object of the present invention also provides the preparation method of above-mentioned material, solves the many needs in the current preparation transparent superhydrophobic coating Perfluorosilane modification with low surface energy, high production cost, complicated process, and inability to scale up production

Method used

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  • Super-hydrophobic polyurethane/ oxide nano particle hybrid coating material and preparation method thereof
  • Super-hydrophobic polyurethane/ oxide nano particle hybrid coating material and preparation method thereof
  • Super-hydrophobic polyurethane/ oxide nano particle hybrid coating material and preparation method thereof

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Embodiment 1

[0038] 1. Nano silica pretreatment

[0039] Weigh 3g of precipitated nano-silica (average particle size 50nm, specific surface area 150m 2 / g), dried in an oven at 100°C for 2 hours and then placed with 30g of toluene in a 250ml three-necked flask for uniform ultrasonic dispersion; heated to 80°C, and added dropwise 6.4g of γ-glycidoxypropyltrimethoxy hydrolyzed by 20g of toluene Add silane for 30 minutes. After stirring for 30 minutes, heat to 110°C and reflux for 10 hours to fully react; finally, the product was washed 4 times with absolute ethanol, centrifuged, and dried in a vacuum oven at 110°C The modified silica was obtained in 17 hours and placed in a desiccator for later use.

[0040] 2. Preparation of superhydrophobic silica:

[0041] Take 1.5g of the above-mentioned modified silica and disperse ultrasonically in 75g of toluene to prepare a silica solution; then disperse 2.25g of octadecyl amide in 50g of N,N-dimethylformamide ultrasonically, and stir under magnetic force....

Embodiment 2

[0048] 1. Nano silica pretreatment

[0049] Weigh 3g of precipitated nano-silica (average particle size 50nm, specific surface area 150m 2 / g), dried in an oven at 100°C for 2 hours and then placed with 150g of toluene in a 500ml three-necked flask and sonicated until the dispersion is uniform; the temperature is raised to 70°C, and 15g of γ-glycidyl ether oxypropyl trimethyl hydrolyzed by 20g of toluene is added dropwise Add oxysilane for 30 minutes. After stirring for 30 minutes, heat to 110°C and reflux for 5 hours to make it fully react. Finally, the product was washed 4 times with absolute ethanol and centrifuged, and then placed in a vacuum oven at 110°C. After drying for 17 hours, the modified silica was obtained, which was placed in a dryer for later use.

[0050] 2. Preparation of superhydrophobic silica:

[0051] Disperse 0.2g of the above-mentioned modified modified silica in 15g of toluene to prepare a silica solution; then disperse 0.3g of octadecyl amide in 15g of N,N-...

Embodiment 3

[0058] 1. Nano silica pretreatment

[0059] Weigh 3g of fumed nano silica (average particle size 30nm, specific surface area 380m 2 / g), dried in an oven at 100°C for 2 hours and then placed in a 250ml three-necked flask with 90g N,N-dimethylformamide and sonicated until the dispersion is uniform; the temperature is raised to 90°C, and 6.4g gamma hydrolyzed by 20g toluene is added dropwise -Glycidoxypropyltrimethoxysilane, dripping for 30 minutes, after stirring for 30 minutes, heat to 120°C and reflux for 10 hours to make it fully react; finally, the product is washed 5 times with absolute ethanol and centrifuged After drying in a vacuum oven at 110°C for 17 hours, the modified silica is obtained and placed in a desiccator for later use.

[0060] 2. Preparation of superhydrophobic silica:

[0061] Disperse 0.2g of the above-mentioned treated modified silica into 10g of toluene to prepare a silica solution; then disperse 0.3g of octadecyl amide in a mixture of 8g of N,N-dimethylform...

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Abstract

The invention relates to a super-hydrophobic polyurethane / oxide nano particle hybrid coating and a preparation method thereof. The super-hydrophobic coating is prepared by oxide nano particles, silane coupling agent and polyurethane which have wide material source and are easily obtained through a self-assembly method, and has the contact angle of 140-168 degrees and the rolling angle of 1-20 degrees as well as good visible light permeability. The invention solves the problems that the currently prepared transparent super-hydrophobic coating needs extremely low surface energy perfluorinated silane modification, has high production cost and complicated technique, and can not realize large-scale production. The method has simple technique, easily obtained raw material and low cost; and theprepared super-hydrophobic coating can be taken as a dustproof and antifogging protective coating of the surface of solids such as glass and the like, and a waterproof insulating layer used in a micro-electronic device, a sensor and the like.

Description

Technical field [0001] The invention belongs to the technical field of superhydrophobic coating preparation, and more specifically, relates to a superhydrophobic polyurethane / oxide nanoparticle hybrid coating and a preparation method thereof. Background technique [0002] Super-hydrophobic (surface static contact angle greater than 150°) coating has the properties of waterproof, anti-pollution, anti-oxidation, self-cleaning, etc., so it has attracted people's attention. The transparent super-hydrophobic coating not only has the properties of a super-hydrophobic surface but also has good visible light transmittance. It is used for outdoor photoelectric and display equipment, self-cleaning glass for high-rise buildings, and as windshield for automobiles and airplanes. Has huge application value. [0003] At present, there are not many researches on transparent superhydrophobic coatings. The preparation methods mainly include sol-gel method, phase separation method, self-assembly met...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C09D5/00
Inventor 陈苏王丽芳杨胜洋陈莉
Owner JIANGSU FENGMANG COMPOUND MATERIAL SCI&TECH GRP CO LTD
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