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

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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

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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[0037] Example 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 und...

Example Embodiment

[0047] Example 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 am...

Example Embodiment

[0057] Example 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 o...

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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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