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A superhydrophobic surface with hydrophobic vapor function and preparation method thereof

A super-hydrophobic surface, water vapor technology, applied in coatings, epoxy coatings, polyester coatings, etc., can solve problems such as being unsuitable for large-area treatment and application, cumbersome preparation process, and limitations in the use of substrates, to avoid Ink drop splash, simple preparation process, and the effect of improving the insecticidal effect

Active Publication Date: 2017-01-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of these methods is relatively cumbersome, and the use of substrates is relatively limited, so they are not suitable for large-area processing and application.

Method used

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  • A superhydrophobic surface with hydrophobic vapor function and preparation method thereof
  • A superhydrophobic surface with hydrophobic vapor function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) 5.0g of ethyl orthosilicate was added to 68.0g of propanol, and after stirring for 30min at a rotating speed of 400r / min, 6.0g of distilled water, 1.0g of ammonia water, and 4.0g of methyltrimethoxysilane were added. Stir at 400r / min for 140min to obtain a silica sol solution;

[0038] (2) Add 8.0g of phenolic resin resin to the above prepared silica sol solution, stir at a rotating speed of 200r / min, the heating temperature is 60°C, after complete dissolution, add 1.1g of hexamethylenetetramine, at 200r / min Continue stirring at a rotating speed of / min to obtain a composite resin mixed solution, which is left to stand for use;

[0039] (3) The surface of the glass slide is pretreated and dried, and it is ready for use. The composite resin mixed solution prepared in (2) is coated on the treated glass slide with a size of 76mm*26mm, the surface is dried at room temperature, and then dried at 70 ° C for 2 hours, to obtain a hydrophobic vapor function. superhydrophob...

Embodiment 2

[0042] (1) Add 5.4g of tetraethyl orthosilicate to 75.0 g of ethanol, stir at 400r / min for 30min, add 8.2g of distilled water, 4.2g of hexamethyldisilazane, and continue at 400r / min Stir for 120min to obtain the silica sol solution;

[0043] (2) Add 6.8g of epoxy resin (E44) to the above-prepared silica sol, stir at 200r / min, and heat at 55°C. After it is completely dissolved, add 1.5g of polyamide and 1.0 ethylene glycol Amine, continue to stir under the rotating speed of 200r / min, obtain the composite resin mixed solution, leave standstill for use;

[0044] (3) Dried after the surface pretreatment of the copper sheet, ready for use. Coat the composite resin mixed solution prepared in (2) on the treated copper sheet (5mm*3mm), dry the surface at room temperature, and then bake at 100°C for 2 hours to obtain a superhydrophobic surface;

[0045] (4) The superhydrophobic surface obtained in step (3) is tested for hydrophobicity and water vapor performance, and the surface is ...

Embodiment 3

[0047] (1) Add 4.6g of tetraethyl orthosilicate to 60.0g of isopropanol, after stirring for 30min at a speed of 400r / min, add 7.8g of distilled water, 0.5g of ammonia water, 4.6g of trimethylchlorosilane, and continue to Stir at a speed of 400r / min for 120min to obtain a silica sol solution;

[0048] (2) Add 5.5g of epoxy resin (E44) and amino-terminated polydimethylsiloxane with a mass ratio of 2:1 to the above prepared silica sol, stir at a speed of 200r / min, and heat The temperature is 60°C. After it is completely dissolved, add 1.8g of hexamethylenediaminetriethylenetetramine and continue stirring to obtain a composite resin mixed solution, which is left to stand for use;

[0049] (3) Dry the surface of the plastic sheet after pretreatment, and set aside. Apply the composite resin mixed solution prepared in (2) on the surface of the treated plastic sheet (10mm*5mm), dry it at room temperature, and then bake it at 85°C for 2 hours to obtain a superhydrophobic surface with ...

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Abstract

The invention discloses a super-hydrophobic surface with a moisture evacuating function and a preparation method thereof, wherein the super-hydrophobic surface is prepared from the following raw materials in parts by weight: 4-6 parts of silicon source, 4-5 parts of silizane and / or siloxane reagent, 50-80 parts of organic solvent, 6-10 parts of distilled water, 5-8 parts of thermosetting resin and / or organic silicon resin and 1-4 parts of curing agent. The preparation method comprises the following steps: adding the silicon source into the organic solvent; adding the distilled water and the silizane and / or siloxane reagent; adding the thermosetting resin and / or organic silicon resin; adding the curing agent; covering the treated substrate surface. The super-hydrophobic surface disclosed by the invention is common and easily available in raw materials and low in cost, and the preparation method is simple in process, simple in process and convenient to construct, and can be applied to various substrate surfaces. The contact angle of the obtained super-hydrophobic surface to water maximally can reach 160 degrees, and the rolling angle minimally can reach 2 degrees. The super-hydrophobic surface maintains a dry state to micro-moisture, and has good mechanical property and durability.

Description

technical field [0001] The invention relates to a super-hydrophobic coating surface, in particular to a super-hydrophobic surface with hydrophobic vapor function and a preparation method thereof. [0002] technical background [0003] The impact of water droplets on solid surfaces is a common phenomenon in nature. Different droplet impact kinetics include spreading, breaking, jetting or bouncing on superhydrophobic surfaces. In the field of engineering, such as inkjet printing, rapid cooling, delaying frost formation on heat exchanger surfaces, cooling ceiling surfaces to prevent condensation and growth of condensed water, etc., all involve the movement behavior of droplets on solid surfaces. Usually, the hydrophilicity and hydrophobicity of the surface can be judged by the contact angle between the water droplet and the solid surface. A solid surface with a contact angle with water greater than 150° and a rolling angle less than 5° is called a superhydrophobic surface. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D161/06C09D163/00C09D183/08C09D167/08
Inventor 张立志全云云
Owner SOUTH CHINA UNIV OF TECH
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