A kind of oil-free super slippery coating and preparation method thereof

A coating and coating technology, which is applied in the field of oil-free super-slip coating and its preparation, can solve the problems of lubricating oil dissipation, greasy feeling, low transparency, etc., and achieve the solution of lubricating oil dissipation, good liquid repellency, and transparency high effect

Active Publication Date: 2022-02-18
成都普界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in the prior art, the present invention provides an oil-free super-slip coating and a preparation method thereof. The process is simple and easy to operate, and the cost is low. It does not need to process micro-nano structures on the surface and inject lubricating oil, and the obtained oil-free The ultra-slip coating has high transparency, no greasy feeling, and no lubricating oil dissipation, which effectively solves the problems of lubricating oil dissipation, low transparency and greasy feeling, and has a wide application prospect

Method used

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  • A kind of oil-free super slippery coating and preparation method thereof
  • A kind of oil-free super slippery coating and preparation method thereof
  • A kind of oil-free super slippery coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A preparation method for an oil-free super-slip coating, comprising the following steps:

[0029] A glass substrate is selected, and the substrate is pre-cleaned by ultrasonic cleaning in acetone and ultrapure water at a power of 100W for 10 minutes; On the surface of the pre-cleaned glass substrate, the coating thickness is 500nm-2mm, and then placed horizontally at 25°C and 50% humidity for 24 hours, then ultrasonically cleaned with tetrahydrofuran, ethanol and water at a power of 100W for 5 times, and blown with nitrogen. Dries to an oil-free super slippery finish.

[0030] Carry out contact angle and sliding angle test on the oil-free super slippery coating gained in the present embodiment, water contact angle is 105 °, and sliding angle is 7 °; Oil (hexadecane) contact angle is 95 °, and sliding angle is 2 ° .

Embodiment 2

[0032] A preparation method for an oil-free super-slip coating, comprising the following steps:

[0033] Choose a silicon dioxide silicon wafer as the substrate, place the substrate in a mixture of 98vt% concentrated sulfuric acid and 30vt% hydrogen peroxide at a volume ratio of 7:3, heat at 90°C for 12h, and then place it in ultrapure water at 100W Ultrasonic cleaning at high power for 10 minutes; 1g of polydimethylsiloxane (molecular weight 2000-4000) was uniformly drip-coated on the surface of the pre-cleaned substrate through a dropper, with a coating thickness of 500nm-2mm; Place it horizontally for 24 hours under the condition of % humidity, then rinse it with toluene, ethanol and water for 5 times in sequence, and dry it with nitrogen to obtain an oil-free super-lubricious coating.

[0034] The contact angle and sliding angle test were carried out on the oil-free super-slip coating obtained in this embodiment, the oil (n-hexane) contact angle was 94°, and the sliding an...

Embodiment 3

[0036] A preparation method for an oil-free super-slip coating, comprising the following steps:

[0037] Ceramics were selected as the substrate. When pre-cleaning, the substrate was ultrasonically cleaned in acetone and ultrapure water at a power of 100W for 10 minutes, and then plasma treated for 30 minutes; the pre-cleaned ceramic substrate was immersed in 1g of polydimethylsiloxane ( Molecular weight is 6000 ~ 8000) liquid, the coating thickness is 500nm ~ 2mm, and then placed horizontally at 25°C and 85% humidity for 24 hours, then ultrasonically cleaned 5 times with tetrahydrofuran, ethanol and water at a power of 100W, and blown with nitrogen. Dries to an oil-free super slippery finish.

[0038] The contact angle and sliding angle tests were carried out on the oil-free super-slip coating obtained in this example, the oil (perfluoro-n-hexane) contact angle was 85°, and the sliding angle was 1.5°.

[0039] Water and various non-polar organic liquids are placed on the oil...

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Abstract

The invention provides an oil-free super-slip coating and a preparation method thereof. The preparation method comprises the following steps: coating polydimethylsiloxane on the pre-cleaned substrate surface, then placing it horizontally for 20-30 hours, and then using Tetrahydrofuran or toluene, ethanol and water are washed sequentially for 4 to 6 times, and dried with nitrogen to obtain an oil-free super-slip coating. The invention also includes the oil-free super-slip coating prepared by the above method. The process of the present invention is simple and easy to operate, low in cost, does not need to process micro-nano structures on the surface and inject lubricating oil, and the obtained oil-free super-slippery coating has high transparency, no greasy feeling, no lubricating oil dissipation, and effectively solves the problems of lubricating oil dissipation, Problems such as low transparency and greasy feeling have wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of super-slip coating preparation, and in particular relates to an oil-free super-slip coating and a preparation method thereof. Background technique [0002] The super-slippery surface imitated by Nepenthes is mainly to pour various lubricating fluids into the base surface with rough structure to form a smooth and continuous lubricating fluid film. The surface is impervious to most liquids and exhibits an extremely small droplet sliding angle. In recent years, the research on super-slippery surfaces has made significant progress, because it overcomes the shortcomings of super-hydrophobic materials, such as difficulty in super-repelling liquids with low surface energy, poor pressure resistance, etc., and shows good light transmission, self-healing, etc. The advantages, coupled with the application to a variety of substrates, make super-slip materials have broad prospects in self-cleaning, anti-biological po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D5/16
CPCC09D183/04C09D5/1675
Inventor 邓旭王德辉
Owner 成都普界科技有限公司
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