Preparation method for directly generating hydroxyapatite-containing biological ceramic membrane on surface of titanium

Abstract

The invention discloses a preparation method for directly generating a hydroxyapatite-containing biological ceramic membrane on the surface of titanium, and aims to solve the practical problems that the prior art is complex in process, time-consuming, low in electrolyte utilization ratio, poor in membrane forming efficiency and the like. The preparation method adopts a basic method of micro-arc oxidation, and is characterized in that during the preparation of electrolyte, low-solubility calcium dihydrogen phosphate is used for providing phosphate anions and citric acid is used as a complexing agent. Compared with the prior art, although the solubility of the calcium dihydrogen phosphate used in the preparation method is low, the solubility of the calcium dihydrogen phosphate is improved after the calcium dihydrogen phosphate is complexed with the citric acid, calcium ions and phosphate anions are provided at the same time, the utilization ratio of the electrolyte is high, the reaction speed is high, the membrane forming efficiency is high, the preparation method is simple and easy to operate and low in cost, the hydroxyapatite-containing biological ceramic membrane prepared by the preparation method is stable in structure, uniform in distribution and high in effective matter content, and has a wide prospect in the fields of hard tissue implants, tooth planting and the like.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a method for directly forming a hydroxyapatite-containing bioceramic film on the surface of titanium and titanium alloy by using a micro-arc oxidation method. Background technique [0002] Due to their excellent biocompatibility, corrosion resistance, comprehensive mechanical properties and technological properties, titanium and titanium alloys have gradually become the materials of choice for the replacement and repair of human hard tissues such as dental implants and artificial joints. The free metal ions produced on the surface enter the biological tissue and cause cell death. The theoretical composition of hydroxyapatite is Ca 10 (PO 4 ) 6 (OH) 2 Belonging to the hexagonal crystal system, it has the same chemical composition and crystal structure as the inorganic substances in natural bone tissue. It has good biocompatibility and biological activity, is safe...

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Problems solved by technology

[0007] In order to overcome the practical problems in the preparation of hydroxyapatite-containing bioceramic membranes in the prior art, such as complex process, long time consumption, low electrolyte utilization efficiency, poor film formation efficiency, and difficult control of the working process, the present invention provides a titanium And the preparation method of directly generating hydroxyapatite-containing bioceramic film on the surface of titanium alloy mainly adopts the basic method of micro-arc oxidation, which is characterized in that calcium dihydrogen phosphate with low solubility is used to provide phosphate ions when preparing electrolyte, and citric acid is used as a complexing agent

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