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A kind of hydrophilic coating based on polysilazane and its preparation method and application

A hydrophilic coating and polysilazane technology, applied in the field of materials, can solve problems such as water resistance

Active Publication Date: 2021-03-16
北京和尔泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, before preparing the cross-linked layer, the substrate needs to be placed in H 2 o 2 and H 2 SO 4 Activated in solution and therefore unsuitable for metal and polymer substrates
[0004] Moreover, the general hydrophilic coating is an organic coating, which is not water-resistant

Method used

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  • A kind of hydrophilic coating based on polysilazane and its preparation method and application
  • A kind of hydrophilic coating based on polysilazane and its preparation method and application
  • A kind of hydrophilic coating based on polysilazane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1 Preparation of solution composition for SiON transition layer

[0077] Adopt PHPS to prepare the solution composition for the SiON transition layer, and its specific mass percentage is composed of:

[0078] PHPS 20%

[0079] Piperidine 0.05%

[0080] Dibutyl ether 79.95%.

Embodiment 2

[0081] Example 2 Preparation of SiON transition layer

[0082] The solution composition in Example 1 was used to spin-coat on glass at a spin-coating rate of 2000r / min and a spin-coating time of 60s; after the solvent evaporated, it was cured by heating at 100°C for 2h. The thickness of the obtained SiON transition layer was 350nm, and the adhesion of the coating tested by the cross-hatch method was grade 1. The surface elements of the silicon oxide coating were analyzed by X-ray photoelectron spectroscopy XPS, and the O / Si ratio was 0.93.

Embodiment 3

[0083] Example 3 Preparation of SiON transition layer

[0084] The solution composition in Example 1 was used to spin-coat on the glass, the spin-coating rate was 2000r / min, and the spin-coating time was 60s; after the solvent evaporated, it was cured at room temperature for 4 hours. The thickness of the obtained SiON transition layer was 353nm, and the adhesion of the coating tested by the cross-hatch method was grade 1. The surface elements of the silicon oxide coating were analyzed by X-ray photoelectron spectroscopy XPS, and the O / Si ratio was 0.82.

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Abstract

The invention belongs to the technical field of materials and particularly relates to a polysilazane-based hydrophilic coating, a preparation method therefor and an application of the polysilazane-based hydrophilic coating. The hydrophilic coating disclosed by the invention is obtained through carrying out hydrophilization treatment on a Si-N and / or Si-H-containing organic-inorganic hybridized transition layer or a SiON transition layer prepared on the basis of polysilazane. The hydrophilic coating is flexible in coating mode, is not restricted byshapes and sizes of substrates and is easy in large-area preparation. Secondly, the substrates are not required to be subjected to activating treatment prior to preparation of the coating, so that the process is simple, and the operation is convenient. Furthermore, the hydrophilic coating is transparent and dense, is high in hardness and has relatively good adhesive power on various substrates, the hardness reaches up to 9H, and the transparency is 90% or more. In addition, a water contact angle of the coating disclosed by the invention can reach 6.5 degrees to the minimum. The preparation method disclosed by the invention can be rapidly carried out at normal temperatures or relatively low heating temperatures. The prepared hydrophilic coating has properties of inorganic coatings, thereby having an excellent water-resistant characteristic. The hydrophilic coating disclosed by the invention can be applied to multiple fields of anti-fouling, anti-fogging and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a polysilazane-based hydrophilic coating and a preparation method and application thereof. Background technique [0002] The hydrophilic surface has good wettability, and water droplets can spread on the surface to form a uniform water film, which can wash away the dust on the surface, and is widely used in anti-fog, anti-fouling and other fields. Construction of hydrophilic surfaces starts with UV light-induced TiO 2 Super hydrophilic coating, the water contact angle is close to 0°. However, the coating prepared by this method only exhibits hydrophilicity under the irradiation of ultraviolet light, which is not suitable for indoor application. In order to solve this problem, some researchers proposed to modify the surface of the light-induced super-hydrophilic coating, and the super-hydrophilic coating was prepared by its highly rough micro-nano structure to prov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/16C09D7/61C03C17/22C03C17/23
CPCC03C17/22C03C17/23C03C2218/116C09D183/16C09D7/61
Inventor 张宗波王丹徐彩虹邹铭黄文文周晓龙郭香
Owner 北京和尔泰新材料科技有限公司