Preparation method of superhydrophobic hydroxyapatite film layer on surface of magnesium alloy

A technology of hydrohydroxyapatite and magnesium alloy, which is applied in the direction of metal material coating technology, coating, and pharmaceutical formulations. The process is simple and easy, and the effect of slowing down the time of corrosion
CN107789665AInactive Publication Date: 2018-03-13CHONGQING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV OF TECH
Publication Date
2018-03-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of a superhydrophobic hydroxyapatite film layer on the surface of magnesium alloy. The preparation method comprises the following steps: performing surfacepretreatment, preparing a nano-structured hydroxyapatite layer by a hydrothermal method and performing hydrophobization treatment to the hydroxyapatite layer. The hydrothermal method is designed, andby the hydrothermal method, a rod-shaped hydroxyapatite crystal layer adopting micron-scale length and nano-scale diameter is prepared on the surface of the magnesium alloy, then a stearic acid film is prepared on the surface of the nano-structured hydroxyapatite film layer to form a superhydrophobic film layer with the contact angle of 153 degrees under a static droplet, the film layer can reducethe corrosion current density of the magnesium alloy by 2 orders of magnitude and the impedance modulus of coating is increased from 2029 Omega.cm2 to 117674 Omega.cm2. The preparation method of thenano-structured hydrophobic coating is simple, equipment is simple and easy to control, the cost is low, and the controllability is good; the preparation method is suitable for large-scale production.
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Description

technical field

[0001] The invention belongs to the technical field of magnesium alloy surface modification and anticorrosion, and in particular relates to a preparation method of a superhydrophobic hydroxyapatite film layer on the surface of a magnesium alloy. Background technique

[0002] As a new type of biodegradable material, magnesium and magnesium alloys have a density and elastic modulus similar to that of human bone, and have good mechanical properties and biocompatibility, which have become a hot research topic for domestic and foreign scholars. However, its degradation rate in the human body is too fast, so that it cannot meet the mechanical and morphological requirements of medical biomaterials during its service, and the too fast degradation rate will cause symptoms such as local inflammation in the human body. Therefore, reducing or even controlling the degradation rate of magnesium alloys has always been an urgent problem to be solved in the field of biomateri...

Claims

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