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Method for preparing transparent hydrophobic coating

A super-hydrophobic coating and transparent technology, which is applied in the field of preparation of hydrophobic coatings, can solve the problems of poor applicability and high production cost of transparent super-hydrophobic surfaces, and achieve the effects of low cost, easy availability of raw materials, and good repeatability

Inactive Publication Date: 2009-02-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a simplified preparation method of transparent super-hydrophobic coating to solve the problems of high production cost and poor applicability of transparent super-hydrophobic surface. The sol-gel method is used to coat the surface of the transparent base material, and then the molecular self- Assemble and modify the surface to obtain a super-hydrophobic coating with a contact angle greater than 150° and good visible light transmission

Method used

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  • Method for preparing transparent hydrophobic coating
  • Method for preparing transparent hydrophobic coating
  • Method for preparing transparent hydrophobic coating

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Preparation of coating sol:

[0046]Dissolve 2.04g of aluminum isopropoxide in 20.4g of toluene, add 1.3g of ethyl acetoacetate after complete dissolution, fully stir for reaction, add 0.72g of deionized water, stir for reaction, and obtain a coating sol;

[0047] (2) Coating film on the surface of the base material:

[0048] Immerse the glass sheet in the sol prepared in step (1), slowly and uniformly extract it from the sol with a pulling machine, the pulling speed is 2mm / s, and leave it at room temperature for use after being proposed;

[0049] (3) Hydrophobic self-assembly surface modification process:

[0050] Immerse the glass sheet coated in step (2) in 10mM n-hexane solution of stearic acid, carry out self-assembly reaction for 24 hours, then rinse repeatedly with n-hexane, and dry it in an oven at 100°C to obtain a transparent superhydrophobic coating. Floor.

[0051] as attached figure 1 The field emission scanning electron microscope photo of the coat...

Embodiment 2

[0053] (1) Preparation of coating sol:

[0054] Dissolve 1.53g of aluminum isopropoxide in 20.4g of toluene, add 0.75g of acetylacetone after complete dissolution, fully stir for reaction, add 0.54g of deionized water, stir for reaction, and obtain a coating sol;

[0055] (2) Coating film on the surface of the base material:

[0056] Immerse the glass sheet in the sol prepared in step (1), slowly and uniformly extract it from the sol with a pulling machine, the pulling speed is 3mm / s, and leave it standing at room temperature for later use;

[0057] (3) Hydrophobic self-assembly surface modification process:

[0058] Immerse the glass sheet coated with film in step (2) in the n-hexane / carbon tetrachloride (70 / 30, V / V) solution of 4mM tetrahydroperfluorodecyl trichlorosilane, carry out self-assembly reaction 1h, then use Rinse with dichloromethane, and dry in an oven at 50°C to obtain a transparent super-hydrophobic coating.

[0059] as attached image 3 As shown, the surfa...

Embodiment 3

[0061] (1) Preparation of coating sol:

[0062] Dissolve 1.02g of aluminum isopropoxide in 20.4g of toluene, add 0.66g of ethyl acetoacetate after complete dissolution, fully stir for reaction, add 0.36g of deionized water, stir for reaction, and obtain a coating sol;

[0063] (2) Coating film on the surface of the base material:

[0064] Immerse the glass piece in the sol prepared in step (1), and lift it out of the sol slowly and uniformly with a pulling machine at a pulling speed of 3 mm / s. After putting it out, let it stand at room temperature for 30 minutes, and repeat the previous operation for the second time. Coating, and then stand at room temperature for use;

[0065] (3) Hydrophobic self-assembly surface modification process:

[0066] Immerse the glass sheet coated with film in step (2) in the n-hexane / carbon tetrachloride (70 / 30, V / V) solution of 4mM tetrahydroperfluorodecyl trichlorosilane, carry out self-assembly reaction 1h, then use Rinse with dichloromethan...

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Abstract

The invention discloses a preparation method of a transparent super-hydrophobic coating layer. The preparation method adopts the sol-gel method to carry out the film coating on the surface of a substrate material and uses substances containing hydrophobic chains to carry out the self-assembled modification of the surface of the coating layer, the contact angle of the surface of the coating layer is greater than 150 degrees, the transparent super-hydrophobic coating layer has good permeability to visible light, and the average light transmittance is greater than 60 percent. The method has simple used process, easy obtainment of raw materials, low cost and good repeatability, the prepared coating layer has excellent superhydrophobicity and light transmittance, thereby being applicable to windshields of automobiles, aircrafts, spacecrafts, and the like, and being applicable to window glass, curtain walls and other occasions of buildings.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic coating, in particular to a method for preparing a transparent super-hydrophobic coating by using a sol-gel method and surface self-assembly modification. Background technique [0002] Super-hydrophobic surface generally refers to a special functional surface with a contact angle of more than 150° on the surface of a material. Feathers, etc., for inspiration. Superhydrophobic surfaces have many unique surface properties: such as self-cleaning properties, antifouling properties, hydrophobicity, low coefficient of friction, etc. These special properties make them of great application value in many fields. [0003] The transparent super-hydrophobic coating not only has the properties of a super-hydrophobic surface but also has good visible light permeability. If it is applied to a glass surface, self-cleaning glass can be prepared, which can be used as windshields for automobiles, airplanes, a...

Claims

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Application Information

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IPC IPC(8): C03C17/38
Inventor 乌学东史明辉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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