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Superhydrophobic coatings usable underwater and methods of making and using the same

A super-hydrophobic coating and water-based technology, applied in the direction of chloroprene homopolymer coatings, coatings, and devices for coating liquids on the surface, can solve problems such as vulnerability to damage, coating peeling, and insufficient use strength , to achieve the effect of reducing contact area, reducing adhesion, and resisting water/steam penetration

Active Publication Date: 2018-05-15
BEIJING NEATRITION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many reports on the preparation of superhydrophobic coatings in academic literature, but these coatings cannot be applied on a large scale in water
The reason is that the micro-nano composite structure of the superhydrophobic coating is very fragile, and it is easily damaged under continuous water flow disturbance, and the use strength is insufficient; on the other hand, due to the effect of hydrostatic pressure, water will penetrate into the coating and between substrates, causing the coating to peel off

Method used

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  • Superhydrophobic coatings usable underwater and methods of making and using the same
  • Superhydrophobic coatings usable underwater and methods of making and using the same
  • Superhydrophobic coatings usable underwater and methods of making and using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Prepare the bottom material of the present invention according to the following formula and ratio:

[0050] Silicone Rubber

3g

SBR

2g

C5 (softening point 80°C)

5g

Polyether modified polymethylsiloxane

1g

Toluene

89g

[0051] Prepare the hydrophobic material according to the following formula and ratio:

[0052] Octadecyltrimethoxysilane

2g

ethanol

95.9g

Nano silicon oxide (25nm)

2g

hydrochloric acid

0.1g

[0053] Preparation:

[0054] Step 1: Mix the above primers and stir at 30°C for 12 hours to prepare a primer coating solution;

[0055] Step 2: Add 2g of octadecyltrimethoxysilane in the above hydrophobic material to 95.9g of ethanol, stir at room temperature for 2h, then add 2g of nano silicon oxide (25nm) and 0.1g of hydrochloric acid, and stir at 70°C for 12h . Cool to room temperature to prepare a hydrophobic material coating solution.

[0056] Instructions...

Embodiment 2

[0061] Prepare the bottom material of the present invention according to the following formula and ratio:

[0062]

[0063]

[0064] Prepare the hydrophobic material according to the following formula and ratio:

[0065] Tridecafluorooctyltrimethoxysilane

15g

acetone

78.5g

Nano silicon oxide (15nm)

3g

Nano silicon oxide (60nm)

2g

Nano silicon oxide (200nm)

1g

Acetic acid

0.5g

[0066] Preparation:

[0067] Step 1: Mix the above primers and stir at 20°C for 24 hours to prepare a primer coating solution;

[0068] Step 2: Add 15g of tridecafluorooctyltrimethoxysilane in the above hydrophobic material to 78.5g of acetone, stir at room temperature for 1h, then add 3g of nano-silica (15nm), 2g of nano-silica (60nm), 1g of nano Silicon oxide (200nm) and 0.5g acetic acid were stirred at 50°C for 24h. Cool to room temperature to prepare a hydrophobic material coating solution.

[0069] Instructions:

[0070] ...

Embodiment 3

[0074] Prepare the bottom material of the present invention according to the following formula and ratio:

[0075]

[0076]

[0077] Prepare the hydrophobic material according to the following formula and ratio:

[0078] Octadecyltrichlorosilane

0.5g

Toluene

98.9g

Nano silicon oxide (15nm)

0.5g

sulfuric acid

0.1g

[0079] Preparation:

[0080] Step 1: Mix the above primers and stir at 50°C for 12 hours to prepare a primer coating solution;

[0081] Step 2: Dissolve octadecyltrichlorosilane in 98.9 g of toluene in the hydrophobic material above, and stir for 0.5 h. Subsequently, 0.5 g of nano silicon oxide (15 nm) and 0.1 g of sulfuric acid were added, and the reaction was stirred at 110° C. for 0.5 h. After cooling to room temperature, a hydrophobic material coating solution was obtained.

[0082] Instructions:

[0083] Step 1: Spray the coating solution of the above-mentioned primer on the glass substrate, and let it s...

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Abstract

The invention discloses a super-hydrophobic coating capable of being used underwater and a preparation and application method thereof, and belongs to the technical field of super-hydrophobic coatings. The super-hydrophobic coating is formed by a backing material and a hydrophobic material. The backing material is prepared from, by mass, 5% to 30% of sealing rubber, 5% to 30% of petroleum resin, 1% to 10% of flatting agent and 30% to 89% of organic solvent A. The backing material and the hydrophobic material are used in combination, and on the basis of guaranteeing super-hydrophobic performance, the backing material is utilized for increasing the direct binding strength of a super-hydrophobic coating and a base material; damage of water flow / steam and the like to the super-hydrophobic coating can be effectively reduced, use strength is increased, the super-hydrophobic state can be maintained in the underwater / high-humidity environment for a long time, the service life can be prolonged, and great significance is achieved on oceangoing voyage, underwater exploration and the like.

Description

technical field [0001] The invention relates to the technical field of super-hydrophobic coatings, in particular to a super-hydrophobic coating that can be used underwater and methods for preparing and using the same. Background technique [0002] The phenomenon that the lotus leaf emerges from the mud without being stained has been discovered long ago. Research by scientists has found that the surface of the lotus leaf has a composite structure in both micron and nanometer scales, which endows the surface of the lotus leaf with super-hydrophobic properties. People modeled the micro-nano composite structure of the lotus leaf to build an artificial super-hydrophobic coating. When a water drop falls on a surface covered with a superhydrophobic coating, a spherical water droplet is formed, with a contact angle usually greater than 150° and a roll angle less than 10°. In this state, water droplets cannot infiltrate or penetrate into the surface and contact the substrate, and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D111/00C09D157/02C09D123/28C09D123/22C09D1/00C09D7/47C09D7/65C09D7/61B05D7/24
CPCB05D7/24B05D7/544B05D2451/00B05D2530/00B05D2601/20C08L2205/03C08L2205/035C09D1/00C09D7/63C09D111/00C09D123/22C09D123/286C09D157/02C08L83/04C08L9/06C08L57/02C08L23/286C08L23/22C08L9/02B05D2420/01B05D2401/10B05D2420/02
Inventor 周晓林刘嘉贤肖鹏飞
Owner BEIJING NEATRITION TECH CO LTD
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