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Preparation method of super-hydrophobic coating

A technology of super-hydrophobic coatings and mixed coatings, which is applied in coatings, anti-corrosion coatings, conductive coatings, etc., which can solve the problems of easy peeling of coatings, increased coating resistance, and decreased adhesion, and achieve corrosion resistance And the effect of high wear resistance, good static conductivity and high bonding strength

Inactive Publication Date: 2021-08-27
陕西工业职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to make the WPU coating reach a super-hydrophobic state, the inventor further added a large amount of hydrophobic fillers, but adding too much will increase the interface in the coating, resulting in a significant decline in the adhesion of the coating, especially when adding too much The PTFE emulsion will increase the resistance of the coating, reduce the adhesion and make the coating easy to peel

Method used

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  • Preparation method of super-hydrophobic coating
  • Preparation method of super-hydrophobic coating
  • Preparation method of super-hydrophobic coating

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Embodiment

[0030] In this embodiment, in order to obtain a superhydrophobic coating with high bonding strength, which can prevent the coating from peeling, and can also meet the conductivity requirements and have superhydrophobic function when the content of the PTFE-MWCNTs hydrophobic filler system is low, The inventors conducted the following research and development.

[0031] The inventors first prepared the M-MWCNTs-PTFE / WPU hybrid coating system.

[0032] At room temperature, use a magnetic stirrer to mix KH-550 silane coupling agent and distilled water at a mass ratio of 1:1 to hydrolyze the KH-550 coupling agent, store it at room temperature after hydrolysis, and store it for later use.

[0033] After that, MWCNTs particles, PTFE emulsion and hydrolyzed KH-550 silane coupling agent (the above three fillers are referred to as M-MWCNTs-PTFE hydrophobic filler system) were added to the WPU emulsion according to the dosage shown in Table 1 by magnetic stirring. A modified WPU mixed c...

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Abstract

The invention relates to the field of metal coatings, and discloses a preparation method of a super-hydrophobic coating, which comprises preparation of an M-MWCNTs-PTFE / WPU mixed coating system and preparation of the coating. A super-hydrophobic coating is also disclosed. The prepared coating is high in bonding strength, the coating is not prone to peeling, the conductivity requirement can be met under the condition that the content of a PTFE-MWCNTs hydrophobic filler system is low, meanwhile, the super-hydrophobic function is achieved, the coating can be used as a self-cleaning coating, and the coating has good static conductive performance, high corrosion resistance and abrasion resistance and long service life. The invention provides a new way for preparing the WPU anti-corrosion conductive coating with high adhesive force and a self-cleaning function through electrostatic spraying.

Description

technical field [0001] The invention relates to the field of metal coatings, in particular to a preparation method of a superhydrophobic coating. Background technique [0002] Coating refers to a thin layer of material that adheres to a certain base material to play a special role and has a certain bonding strength with the base material. It can overcome certain defects of the matrix material and improve its surface properties, such as optical properties, electrical properties, erosion and corrosion resistance, wear resistance and mechanical strength, etc. It belongs to a thin film with a support. [0003] The inventors found in the previous research that adding an appropriate amount of polytetrafluoroethylene (PTFE) emulsion as a hydrophobic filler can reduce the surface free energy of the waterborne polyurethane (WPU) coating, and at the same time, the electrostatic spraying process can make multi-walled carbon nanotubes (MWCNTs) ) particles construct a microcosmic rough ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D127/18C09D7/61C09D5/24C09D5/08
CPCC08L2201/04C09D5/08C09D5/24C09D175/04C09D7/61C08L27/18C08K3/041
Inventor 王芳芳
Owner 陕西工业职业技术学院
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