Method for preparing magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion

A super-hydrophobic surface, magnesium alloy technology, applied to the surface coating liquid device, special surface, pretreatment surface, etc., can solve the problems of long preparation cycle, expensive equipment, environmental pollution, etc., to achieve fast processing speed, Ease of operation, effect of improving corrosion performance

Inactive Publication Date: 2017-05-31
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many methods for the preparation of super-hydrophobic surfaces, such as the combination of plasma, chemical etching technology, electroplating and other technologies combined with the coating of low surface energy substances, or the use of chemical conversion methods, super-hydrophobic surfaces have been prepared. But these methods or equipment are expensive, or have pollution to environment, or preparation cycle is too long etc., still have room for improvement

Method used

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  • Method for preparing magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion
  • Method for preparing magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion
  • Method for preparing magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Grind and polish the AZ91D magnesium alloy sample, ultrasonically clean it with acetone, ethanol and distilled water, and then dry it. The laser marking machine adopts a dot shape, the lattice spacing is 50 μm, and the current is 12A. The surface of the AZ91D magnesium alloy sample is rough. micron-scale surfaces, such as figure 1 As shown, after laser processing, a micron-scale rough structure is formed on the surface.

Embodiment 2

[0035] Preparation of epoxy resin solution and SiO 2 Nanodispersion:

[0036] Epoxy resin solution: The epoxy resin solution uses acetone as the solvent, and the volume ratio of epoxy resin to acetone is 1:10. The curing agent of the epoxy resin is 2,4,6-tris(dimethylaminomethyl)phenol, and the curing agent is polyamide resin.

[0037] SiO 2 Nano-dispersion: nano-SiO 2 Mix 1.5g of particles, 0.1L of absolute ethanol and 0.75L of silane coupling agent to obtain a concentration of 15g / L SiO 2 Nanodispersion.

[0038] Uniform with ultrasonic vibration, earlier the epoxy resin solution is coated on the sample surface after the laser processing in embodiment 1 with the homogenizer, with high-purity N 2 Blow dry, and then coat SiO on the sample surface2 The nano-dispersion liquid is placed in a drying oven for 3 hours to obtain a micro / nano composite surface structure.

[0039] Preparation of ethanol solution of perfluoroalkyltriethoxysilane: Dissolve 0.1mL of perfluoroalkyltr...

Embodiment 3

[0042] The only difference from Example 2 is that SiO 2 The concentration of the nanodispersion varies. In this example, SiO 2 The concentration of nano-dispersion liquid is 10g / L.

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Abstract

The invention discloses a method for preparing a magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion. The method includes the following steps that S1, a micron-order coarse structure is prepared on the surface of a magnesium alloy sample; S2, an epoxy resin solution and SiO2 nano dispersion liquid are prepared, so that a micron/nano composite surface structure is obtained; and S3, a perfluoroalkyltriethoxysilane ethanol solution is spin-coated onto the surface of the micron/nano composite structure of the sample for drying, and accordingly the super-hydrophobic surface can be obtained. The method with laser processing combined with nano-structure construction and low-surface substance coating is adopted, the super-hydrophobic surface structure is obtained, and super-hydrophobic performance is good; and moreover, sufficient stability is achieved, the corrosion resistance in simulated body fluid is effectively improved, and the alloy surface has good biological fluid corrosion resistance. The method for preparing the magnesium alloy super-hydrophobic surface resistant to biological fluid corrosion is simple, easy to operate, low in cost and small in time consumption, production efficiency is greatly improved, and a feasible path is provided for improving the corrosion resistance of magnesium alloy in biological fluid.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, and relates to a treatment method for a corrosion-resistant super-hydrophobic surface. Background technique [0002] As a light metal material, magnesium alloy is considered to be a green engineering material in the 21st century. Because of its advantages of high specific strength, high specific stiffness, good thermal fatigue performance, good biocompatibility, excellent electromagnetic shielding performance, strong thermal and electrical conductivity, good shock resistance and recyclability, it is widely used in transportation, biomedicine, aerospace, etc. And defense industry and other fields have a broad application prospect. In recent years, due to its good biocompatibility, low density, and elastic modulus similar to that of human bones, magnesium alloys have become the most promising medical metal materials and have strong development prospects. [0003] As a medical i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D5/00B23K26/362B05D3/00
Inventor 张倩倩
Owner DALIAN UNIV
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