Method for preparing porcelain insulator surface super-hydrophobic coating

A ceramic insulator and super-hydrophobic technology, which is applied in the field of preparation of super-hydrophobic interfaces, can solve the problems of unpublished reports, complex preparation methods and high costs.

Inactive Publication Date: 2009-06-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some preparation methods of these coatings are complicated, and some are expensive.
And it needs to use harsh chemical conditions and processes, or it cannot be prepared on a large scale
There are also restrictions on the base material, such as the research on the superhydrophobic coating on the surface of high-voltage porcelain insulators, and there are no public reports so far
The structure of porcelain insulators is diverse and complex, and the main problem at present is to control the problem of its fouling layer, so that the surface of porcelain insulators changes from hydrophilic to superhydrophobic

Method used

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  • Method for preparing porcelain insulator surface super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Using tetraethyl orthosilicate (TEOS) as the precursor and absolute ethanol as the flux, after mixing according to the mass ratio of tetraethyl orthosilicate: absolute ethanol: ammonia water = 1:20:1, at a temperature of 50°C Stir down, prepare silica sol;

[0017] (2) Silica sol was modified by adding 8wt% of N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane and stirred at room temperature. Then carry out vacuum defoaming treatment;

[0018] (3) Clean the surface of the porcelain insulator, dip it in a methanol solution containing 3wt% N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane for 5 minutes, take it out and dry it naturally;

[0019] (4) Put the porcelain insulator in the modified silica sol for pulling coating, form a coating on the surface of the porcelain insulator, dry it naturally and put it in an oven for heat treatment at 110 degrees Celsius;

[0020] (5) Add curing agent DACH (1,2, diaminocyclohexane) to the addition-type RTV liquid silicone rubbe...

Embodiment 2

[0023] (1) Using tetraethyl orthosilicate (TEOS) as the precursor and absolute ethanol as the flux, after mixing according to the mass ratio of tetraethyl orthosilicate: absolute ethanol: ammonia water = 1:20:1, at a temperature of 65°C Stir down, prepare silica sol;

[0024] (2) The silica sol was modified, and 10 wt% of epoxy silane coupling agent Coatosil 1770GE was added, and stirred at room temperature. Then carry out vacuum defoaming treatment;

[0025] (3) Clean the surface of the porcelain insulator, dip it in a methanol solution containing 3wt% N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane for 10 minutes, take it out and dry it naturally;

[0026] (4) Put the porcelain insulator in the modified silica sol for pull-coating, form a coating on the surface of the porcelain insulator, dry it naturally and put it in an oven for heat treatment at 100 degrees Celsius;

[0027] (5) Add curing agent DACH (1,2, diaminocyclohexane) to the addition-type RTV liquid silicone r...

Embodiment 3

[0030] (1) Using tetraethyl orthosilicate (TEOS) as the precursor and absolute ethanol as the flux, after mixing according to the mass ratio of tetraethyl orthosilicate: absolute ethanol: ammonia water = 1:20:1, at a temperature of 30°C Stir down, prepare silica sol;

[0031] (2) The silica sol was modified by adding 5 wt% of N-β-aminoethyl-γ-aminopropyltrimethoxysilane and stirring at room temperature. Then carry out vacuum defoaming treatment;

[0032] (3) Clean the surface of the porcelain insulator, dip it in a methanol solution containing 3wt% N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane for 5 minutes, take it out and dry it naturally;

[0033] (4) Put the porcelain insulator in the modified silica sol for pulling coating, form a coating on the surface of the porcelain insulator, dry it naturally and put it in an oven for heat treatment at 120 degrees Celsius;

[0034] (5) Add curing agent DACH (1,2, diaminocyclohexane) to the addition-type RTV liquid silicone rubb...

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Abstract

The invention discloses a method for preparing a porcelain insulator surface super-hydrophobic coating, which takes ethyl orthosilicate as a presoma and absolute ethyl alcohol as flux, and comprises the following steps: preparing silicon dioxide sol through alkaline catalysis, and adding a silane coupling agent to perform the modification treatment; after the porcelain insulator surface is subjected to the cleaning treatment, dipping in the modified silicon dioxide sol for film coating through the czochralski method to form a primary coating and to obtain a micro-nanometer grade coarse structure which is similar to taro leaf; after drying, dipping in addition type liquid silicon rubber sol for secondary film coating through the czochralski method, and then placing into an oven for heat treatment at a temperature of 100-120 DEG C; and obtaining a transparent super-hydrophobic coating after subjecting the primary coating with the micro-nanometer coarse structure to the secondary film coating modification by the liquid silicon rubber with low surface energy.

Description

technical field [0001] The invention relates to a method for preparing a super-hydrophobic interface, in particular to a method for preparing a waterproof, anti-pollution and anti-flashover coating on the surface of a high-voltage porcelain insulator. The super-hydrophobic coating can also be applied to the surface of glass. Background technique [0002] Superhydrophobic (surface static contact angle greater than 150 degrees) coating has waterproof, anti-pollution, anti-oxidation, self-cleaning and other properties, so it has attracted people's attention. In recent years, people have paid more and more attention to the hydrophobic properties of material surfaces. Many superhydrophobic coatings have been prepared. However, some preparation methods of these coatings are complex and some are expensive. Moreover, severe chemical conditions and processes need to be used, or large-scale preparations cannot be performed. There are also restrictions on the base material. For examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 金海云周蕊高乃奎彭宗仁乔冠军金志浩
Owner XI AN JIAOTONG UNIV
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