Method for preparing biomimetic functional gradient coating

A technology of gradient coating and bionic function, which is applied in coatings, devices for coating liquid on the surface, magnetic coatings, etc., can solve the problems of coating wear resistance and insufficient tolerance, and achieve high elastic modulus, Effect of high wear resistance and resistance, high interface durability

Inactive Publication Date: 2019-04-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are only suitable for coatings with a thickness above the submillimeter level; and the concentration of particles in each interface of the produced coating is distributed in a steep gradient from top to bottom, and when subjected to the impact of complex and cyclic loads, the steep gradient Gradient transition makes the wear resistance and resistance of the coating seriously insufficient

Method used

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  • Method for preparing biomimetic functional gradient coating
  • Method for preparing biomimetic functional gradient coating
  • Method for preparing biomimetic functional gradient coating

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Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a preparation method of a biomimetic functionally graded coating in Embodiment 1 of the present invention comprises the following steps:

[0024] Step 1: Coating a mixed solution containing magnetic nanoparticles on a resin substrate to form product I; wherein the magnetic nanoparticles include particles with an outer diameter of 15-25 nm and particles with an outer diameter of 45-55 nm;

[0025] Step 2: applying a magnetic field in the vertical direction of the product I to redistribute the magnetic nanoparticles inside the product I to form product II;

[0026] Step 3: The product II is completely cured to obtain a biomimetic functionally gradient coating.

[0027] figure 2 is the concentration diagram of magnetic nanoparticles in each interface of the coating; wherein, curves a-c are the mixed solution containing only 20nm magnetic nanoparticles, the mixed solution containing only 50nm magnetic nanoparticles and the mixed solution of 20n...

Embodiment 2

[0031] Example 2 of the present invention is a preparation method of a bionic functionally graded coating. On the basis of Example 1, the mass fraction of magnetic nanoparticles in the mixed solution is 15%-25%.

Embodiment 3

[0032] Embodiment 3 of the present invention is a preparation method of a bionic functionally graded coating. On the basis of Embodiment 1 or 2, the magnetic nanoparticles are Fe, Fe 2 o 3 , Fe 3 o 4 One or more of , Co and Ni.

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Abstract

The invention relates to a method for preparing a biomimetic functional gradient coating. The method comprises the following steps: (1) coating a resin substrate with a mixed solution containing magnetic nanoparticles so as to form a product I, wherein the magnetic nanoparticles comprise particles with an outer diameter of 15-25 nm and particles with an outer diameter of 45-55 nm; (2) applying a magnetic field in the vertical direction so as to redistribute the magnetic nanoparticles inside the product I to form a product II; and (3) performing full curing on the product II so as to obtain thebiomimetic functional gradient coating. The prepared biomimetic functional gradient coating has the advantages that the concentrations of the magnetic nanoparticles in interfaces of the coating havegentler gradient distribution from top to bottom due to small-size particles, and the magnetic nanoparticles possessed by the interface with the most magnetic nanoparticles have a larger concentrationvalue and a higher elastic modulus due to large-size particles.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a preparation method of a bionic functional gradient coating. Background technique [0002] The traditional manufacturing methods of functional gradient coating (FGC) include layered deposition, slip casting, centrifugal sedimentation, chemical or physical vapor deposition, etc. However, these methods are only suitable for coatings with a thickness above the submillimeter level; and the concentration of particles in each interface of the produced coating is distributed in a steep gradient from top to bottom, and when subjected to the impact of complex and cyclic loads, the steep gradient The gradient transition makes the wear resistance and resistance of the coating seriously insufficient. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a biomimetic functionally graded coating, so a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D5/23C08J7/06B05D3/00B05D7/24B05D7/02C08L63/00
CPCB05D3/207B05D7/02B05D7/24B05D2201/02B05D2601/20B05D2601/22B05D2601/24B05D2601/28C08J7/065C08J2363/00C09D4/00C09D5/23
Inventor 王正直王添博徐磊
Owner WUHAN UNIV
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