Super-hydrophobic surface with moisture evacuating function and preparation method thereof

A super-hydrophobic surface, water vapor technology, applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve the problems of cumbersome preparation process, unsuitable for large-area processing and application, and limitations in the use of substrates, and achieve simplification The preparation process, good water vapor performance, and the effect of avoiding ink droplet splashing

Active Publication Date: 2014-10-01
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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  • Super-hydrophobic surface with moisture evacuating function and preparation method thereof
  • Super-hydrophobic surface with moisture evacuating function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 5.0 g of tetraethyl orthosilicate to 68.0 g of propanol, stir at a speed of 400 r / min for 30 min, add 6.0 g of distilled water, 1.0 g of ammonia water, and 4.0 g of methyltrimethoxysilane, and continue to Stir at 400r / min for 140min to obtain a silica sol solution;

[0037] (2) Add 8.0 g of phenolic resin to the above prepared silica sol solution, stir at a speed of 200r / min, and heat at a temperature of 60°C. After completely dissolving, add 1.1g of hexamethylenetetramine, Continue to stir under the rotating speed of / min, obtain the composite resin mixed solution, leave standstill for use;

[0038] (3) The surface of the glass slide is dried after pretreatment, and it is ready for use. Coat the composite resin mixed solution prepared in (2) on the treated glass slide with a specification of 76mm*26mm, dry the surface at room temperature, and then bake at 70°C for 2 hours to obtain a water vapor-repellent superhydrophobic surface;

[0039](4) The superhydrop...

Embodiment 2

[0041] (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;

[0042] (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;

[0043] (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;

[0044] (4) The superhydrophobic surface obtained in step (3) is tested for hydrophobicity and water vapor performance, and the surface is ...

Embodiment 3

[0046] (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;

[0047] (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;

[0048] (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 superhydrophobic coating surface, in particular to a superhydrophobic surface with a hydrophobic vapor function and a preparation method thereof. technical background [0002] The impact of water droplets on solid surfaces is a common phenomenon in nature. Different water bead impact dynamics include spreading, breaking, spraying or bouncing on the superhydrophobic upper surface, etc. In the field of engineering, such as inkjet printing, rapid cooling, delaying frosting on the surface of heat exchangers, cooling the surface of the ceiling to prevent condensation and growth of condensed water, etc., all involve the movement behavior of liquid droplets on solid surfaces. Usually, the hydrophilicity and hydrophobicity of a surface can be judged by the contact angle between a water droplet and a solid surface. A solid surface with a water contact angle greater than 150° and a rolling angle less than 5° is called a superhydropho...

Claims

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Application Information

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Patent Type & Authority Applications(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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