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Super-hydrophobic material and preparation method thereof

A super-hydrophobic and super-hydrophobic technology, which is applied in the direction of pretreatment surface, special surface, and device for coating liquid on the surface, etc., can solve the problems of limitation, poor strength and durability of super-hydrophobic materials, and damage to micro-nano structures, etc., to achieve good The effect of self-cleaning

Active Publication Date: 2017-07-25
青岛鑫鼎万兴新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, due to the rough structure required for superhydrophobic materials, the strength and durability of superhydrophobic materials are poor, and their applications in many fields are limited.
Especially long-term use in harsh external environments will destroy the micro-nano structure of the material, thereby reducing corrosion resistance

Method used

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  • Super-hydrophobic material and preparation method thereof
  • Super-hydrophobic material and preparation method thereof
  • Super-hydrophobic material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1 (1) AZ31 magnesium alloy pretreatment: select the magnesium alloy of 3cm * 3cm * 2cm to be substrate, after polishing with sandpaper, in acetone, dehydrated alcohol, ultrasonic cleaning removes the oxide film and greasy dirt on magnesium alloy surface, finally uses Rinse with ionized water and dry with a hair dryer for later use.

[0029] (2) Prepare ZIF-8 powder, configure 0.04mol / L zinc nitrate methanol solution, 0.08mol / L 2-methylimidazole methanol solution, mix and stir them in equal volume for 5min, stir for 2h, centrifuge three times with methanol, 60 ℃ dried overnight to obtain ZIF-8 powder.

[0030] (3) To prepare ZIF-8@SiO2 powder, dissolve 80mg of ZIF-8 powder and 10mg of cetyltrimethylammonium bromide (CTAB) in 80ml of absolute ethanol, and stir for 5min. Take another small beaker, add 0.5ml of tetraethyl orthosilicate (TEOS) and 1ml of absolute ethanol for 10 minutes of ultrasonication, add 0.4ml of ammonia water to the above solution under sti...

Embodiment 2

[0035] The method for material preparation of this embodiment example is basically the same as embodiment 1, and the difference is that the stirring time for preparing ZIF-8 is 4h.

[0036] A superhydrophobic surface with a special micro-nano structure is obtained by combining the micron structure constructed by chemical etching and dip coating method. The obtained nano ZIF-8 particles are regular, with a size of about 250nm, and the final surface contact angle reaches 151°, which has good self-cleaning properties. properties and good corrosion resistance, after soaking in 3.5wt.% NaCl solution for 3 hours, the impedance modulus can still reach 7500Ωcm 2 , At the same time, the material has good wear resistance, and the friction coefficient is still 0.388 after grinding for 20 minutes.

Embodiment 3

[0038] The method for preparing the material of this embodiment is basically the same as that of Embodiment 1, except that the preparation of ZIF-8 was left standing for 24 hours.

[0039]The finally obtained ZIF-8 particles are uniformly dispersed, and the size is about 500nm, and the test contact angle reaches 150°C. The hydrophobic material still has good self-cleaning property and good corrosion resistance. After 3h, the impedance modulus can reach 8000Ωcm 2 , significantly better than the impedance modulus of the blank magnesium alloy. At the same time, the material has good wear resistance. After grinding the steel material for 20 minutes, the friction coefficient is 0.388, which is lower than that of the blank magnesium alloy.

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Abstract

The invention provides a super-hydrophobic material and a preparation method thereof. The construction of the super-hydrophobic material with a special structure on an alloy substrate is realized through controlling the stirring time and the adding quantities of TEOS and ammonia water; a nuclear structure is a regular dodecahedron structure; and the structure is not changed after coating of silicon dioxide. Meanwhile, a micron structure etched with an alloy structure is combined for mutual embedding, so that the surface roughness of the hydrophobic material is increased, the drop and solid surface contact area is reduced, meanwhile, the compactness of the hydrophobic material and a film layer is increased, and a substrate is effectively protected. The super-hydrophobic material constructed on an alloy by the method achieves long-time stability, self-cleanness, corrosion resistance and wear resistance.

Description

technical field [0001] The present invention relates to a hydrophobic material. The invention also relates to a preparation method of the hydrophobic material. Background technique [0002] Inspired by animals and plants in nature, such as lotus leaves, rose petals, gecko feet, rice leaves, etc. have super-hydrophobic properties. Following the characteristics of these animals and plants, artificial hydrophobic surfaces and interfaces with controllable wettability have been prepared. A superhydrophobic surface generally refers to a surface with a contact angle with water greater than 150° and a rolling angle less than 10°. Due to the unique surface properties of superhydrophobic materials, such as: self-cleaning, corrosion resistance, self-healing, etc., it can be widely used in daily life, aerospace, automotive industry and other fields, and it has also aroused people's interest in superhydrophobic materials. Great interest in materials research. Studies have shown that ...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D7/14B05D7/24B05D3/10B05D3/00
CPCB05D3/002B05D3/102B05D5/00B05D7/14B05D7/24
Inventor 刘琦吴翠青陈蓉蓉刘静媛张宏森王君
Owner 青岛鑫鼎万兴新材料有限公司
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