Unlock instant, AI-driven research and patent intelligence for your innovation.

Transparent super-hydrophobic coating in gradient composite structure and preparation method thereof

A super-hydrophobic coating and composite structure technology, applied in coatings, epoxy resin coatings, devices for coating liquids on surfaces, etc., can solve the problems of cumbersome steps, harsh experimental conditions, easy aging, etc., and achieve uniform nanoparticles , the effect of good mechanical properties and good hydrophobicity

Active Publication Date: 2015-02-25
WUHAN UNIV OF TECH
View PDF6 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From previous research results, it can be seen that most of the preparation methods still have problems such as harsh experimental conditions, cumbersome steps, and high cost, which cannot be applied in engineering
The superhydrophobic materials that have been put into the market also have disadvantages such as low surface microstructure strength, easy aging, easy wear, easy pollution, and short service life, which limits their extensive application.
[0005] Patent CN101875785A discloses a method for preparing a superhydrophobic coating using porous polymethylsiloxane as a raw material, but the superhydrophobic coating prepared by this method has poor mechanical properties, poor wear resistance, and is easy to be scraped off. Difference
Patent CN103436138A discloses a hybrid solution of epoxy resin obtained by mixing nanoparticles and epoxy resin, then adding fluorine-containing substances and catalysts to form a fluorine-containing solution, first spraying the hybrid solution on the substrate and then spraying fluorine-containing solution solution, but this method uses fluoroalkyl carboxypolysiloxane, which is expensive and has a higher cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transparent super-hydrophobic coating in gradient composite structure and preparation method thereof
  • Transparent super-hydrophobic coating in gradient composite structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A. Preparation of epoxy bottom bonding layer solution:

[0042] Take 4.5ml of epoxy resin E51 solution in a beaker, add 35ml of acetone solution, ultrasonically disperse for 3 hours, stir for 4 hours until it is completely dissolved, then add 2.25ml of epoxy resin E51 curing agent, and stir for 10 minutes.

[0043] B. Preparation of alkylalkoxysilane hydrophobic interlayer solution:

[0044] (1) Dissolve 2ml of methyltrimethoxysilane solution in 25ml of methanol, fully stir at room temperature to dissolve it, and form a solution;

[0045] (2) Add 1ml of oxalic acid to the solvent in (1), stir for 30 minutes, age at room temperature for 24 hours, add 1.22ml of ammonia solution, stir for 15 minutes, age for more than 24 hours, and form a gel;

[0046] (3) Add 40ml of methanol to dissolve the gel formed in (2), stir and ultrasonically, fully disperse to form a solution, that is, the alkylalkoxysilane hydrophobic intermediate layer solution is obtained;

[0047] C. Prepar...

Embodiment 2

[0056] A. Preparation of epoxy bottom bonding layer solution:

[0057] Take 4.5ml of epoxy resin E51 solution in a beaker, add 35ml of acetone solution, ultrasonically disperse for 3 hours, stir for 4 hours until it is completely dissolved, then add 2.25ml of epoxy resin E51 curing agent E51 curing agent, and stir for 10 minutes.

[0058] B. Preparation of alkylalkoxysilane hydrophobic interlayer solution:

[0059] (1) Dissolve 2ml of methyltrimethoxysilane solution in 25ml of methanol, fully stir at room temperature to dissolve it, and form a solution;

[0060] (2) Add 1ml of oxalic acid to the solvent in step (1), stir for 30 minutes, age at room temperature for 24 hours, add 1.22ml of ammonia solution, stir for 15 minutes, age for more than 24 hours, and form a gel;

[0061] (3) Add 40ml of methanol to dissolve the gel formed in step (2), stir and ultrasonically, fully disperse to form a solution, that is, the alkylalkoxysilane hydrophobic intermediate layer solution is ob...

Embodiment 3

[0071] A. Preparation of epoxy bottom bonding layer solution:

[0072] Take 4.5ml of epoxy resin E51 solution in a beaker, add 35ml of acetone solution, ultrasonically disperse for 3 hours, stir for 4 hours until it is completely dissolved, then add 2.25ml of epoxy resin E51 curing agent E51 curing agent, and stir for 10 minutes.

[0073] B. Preparation of alkylalkoxysilane hydrophobic interlayer solution:

[0074] (1) Dissolve 2ml of methyltrimethoxysilane solution in 30ml of methanol, fully stir at room temperature to dissolve it, and form a solution;

[0075] (2) Add 1ml of oxalic acid to the solvent in step (1), stir for 30 minutes, age at room temperature for 24 hours, add 1.22ml of ammonia solution, stir for 15 minutes, age for more than 24 hours, and form a gel;

[0076] (3) Add 40ml of methanol to dissolve the gel formed in step (2), ultrasonicate after stirring, and fully disperse to form a solution;

[0077] C. Preparation of surface modification functional layer s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preparing a transparent super-hydrophobic coating in a function gradient composite structure and taking alkyl alkoxy silane as a carrier, epoxy resin and trimethyl chlorosilane (TMCS) as modifiers. The gradient composite structure of the coating comprises an epoxy bottom surface adhesive layer, an alkyl alkoxy silane hydrophobic intermediate layer, and a surface modification function layer. The method comprises the following steps: firstly, coating the epoxy bottom surface adhesive layer on a substrate, then coating the alkyl alkoxy silane hydrophobic intermediate layer, and finally further improving the hydrophobicity by using TMCS. The nano-particles on the coating surface are uniform; the contact angle is greater than 150 degrees, and the rolling angle is less than 2 degrees; the coating has good hydrophobic performance; the coating has good mechanical performance, and can bear silk friction for 50 times at 5Kpa; the coating has good light transmittance.The preparing method provided by the invention is simple in process and easy to operate, a large area of membrane is made under normal pressure, the requirement on the substrate material is not high, the cost is low, and the method can be used in protection against water and contamination for transparent materials such as the windows of tall buildings, windshields of vehicles and the like.

Description

technical field [0001] The invention belongs to the technical field of gradient composite structure transparent super-hydrophobic functional coating, and mainly relates to a gradient composite structure transparent super-hydrophobic coating, and a method for preparing an alkyl alkoxysilane as a carrier, combined with epoxy resin and trimethoprim Preparation method of transparent superhydrophobic coating with gradient composite structure modified by chlorosilane. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water greater than 150° and a rolling angle less than 10°. In nature, the surface of the lotus leaf has a natural super-hydrophobic coating, and its surface has micro-nano structures and low surface energy substances. Superhydrophobic coating has the characteristics of anti-fog, anti-fouling, anti-icing, self-cleaning, etc., and has a wide range of applications. [0003] The transparent superhydrophobic coating wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09D183/04C09D163/00B05D1/38B05D3/04
Inventor 罗国强张睿智王锦黄静金志鹏张联盟沈强李美娟
Owner WUHAN UNIV OF TECH