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A kind of superhydrophobic vitrified coating and preparation method thereof

A ceramic and superhydrophobic technology, applied in the field of applied chemistry, can solve the problems of low thermal stability and mechanical stability of organic materials, reduce the surface free energy of metal materials, and lose superhydrophobicity, etc., so as to improve service performance and avoid high temperature Effect of sintering and improvement of production efficiency

Active Publication Date: 2021-03-12
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the conventional preparation of metal superhydrophobic surfaces usually requires building a rough structure on the metal substrate and coating the substrate surface with a hydrophobic material to reduce the surface free energy of the metal material. Most of the metal surface chemical modification layers used are organic and other thermally stable. And materials with low mechanical stability are easily damaged and lose superhydrophobicity in harsh environments, thus limiting their applications

Method used

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  • A kind of superhydrophobic vitrified coating and preparation method thereof
  • A kind of superhydrophobic vitrified coating and preparation method thereof
  • A kind of superhydrophobic vitrified coating and preparation method thereof

Examples

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Embodiment 1

[0048] The precursor component of this example is polysilazane (Polysilazane 1, PSZ1), a low-viscosity liquid organopolysilazane polymer with an average molecular weight of 600-1000 and composed of repeating Si-N units. The laser is DLS-3000C Continuous high-power semiconductor laser, laser wavelength 980nm, maximum output power 3KW, spot size 14mm×2.5mm, working distance 310±10mm.

[0049] The preparation method of above-mentioned ceramic coating is made up of the following steps:

[0050] (1) Sandblast the substrate (a 45 steel sample block with a length of 20mm, a width of 20mm, and a height of 5mm), then clean it with ethanol and acetone, and dry it for later use.

[0051] (2) the xylene solution of 30% organic polymer ceramic precursor PSZ1 is coated on the substrate surface, then add filler ferrocene, make ferrocene in the total material system (containing 30% organic polymer ceramic precursor PSZ1 The mass fraction in xylene solution+filler) is 15%, and the solvent is ...

Embodiment 2

[0055] The precursor component of this example is PSZ2 (Polysilazane2), a low-viscosity liquid organic polysilazane polymer with an average molecular weight of 500-900 and composed of repeating Si-N units. The laser is a DLS-3000C continuous high-power semiconductor laser , The laser wavelength is 980nm, the maximum output power is 3KW, the spot size is 14mm×2.5mm, and the working distance is 310mm±10mm.

[0056] The preparation method of above-mentioned ceramic coating is made up of the following steps:

[0057] (1) Sandblast the substrate (a 45 steel sample block with a length of 20mm, a width of 20mm, and a height of 5mm), then clean it with ethanol and acetone, and dry it for later use.

[0058] (2) Coating the xylene solution of 50% organic polymer ceramic precursor PSZ2 on the substrate surface, then adding filler tetrabutyl titanate, making tetrabutyl titanate in the total material system (containing 30% organic polymer ceramics The mass fraction of the precursor PSZ2 ...

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Abstract

The invention provides a superhydrophobic ceramic coating and a preparation method thereof. The superhydrophobic ceramic coating of the present invention is to apply or spray the mixture of polysilazane organic polymer ceramic precursor and filler to the substrate after the substrate is pretreated, and the filler is ferrocene or titanic acid tetrabutyl ester, and then laser scan the coating layer under the protection of inert gas to achieve ceramic transformation and prepare a ceramic coating. Compared with the traditional high-temperature sintering method, the method of the present invention does not require sintering and reduces energy consumption; the laser energy is concentrated, the heat-affected zone is small, and the composition of the matrix phase is not affected, which can effectively solve the problem of preparing a single polysilazane organic polymer ceramic precursor During the ceramic coating, cracks and pores appear on the surface of the coating due to the overflow of small molecules by laser cracking. The resulting ceramic coating has high hardness, corrosion resistance and excellent superhydrophobicity.

Description

technical field [0001] The invention relates to the field of applied chemistry, in particular to the field of coating preparation, and more specifically to a ceramic coating with high hardness, high corrosion resistance and excellent superhydrophobicity and a preparation method thereof. Background technique [0002] With the continuous development of mechanical equipment in the direction of high speed, heavy load, integration, high precision, and long life, the working environment of its friction parts is becoming increasingly harsh, and pure metal materials are difficult to meet the requirements. Preparing high-performance coating materials on the surface of metal parts and endowing them with special functions has become an effective way to solve the problem of reliable service of metal parts under harsh working conditions. [0003] Metals have high surface free energy and are typical inherently hydrophilic materials. Almost all liquids can easily spread and wet the metal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/08
CPCC23C20/08
Inventor 刘军秦航乔玉林蔡志海张平柳建杜晓坤王思捷郭杰李恩重
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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