Preparation method of strontium-containing phosphate bioactivity conversion coating on titanium surface

A technology of biological activity and phosphate chemistry, which is applied in the field of preparation of strontium-containing phosphate bioactive conversion film on the surface of titanium, can solve the problems of not reaching the nanometer scale, and achieve the promotion of deposition, low energy consumption and production cost, and is beneficial to The effect of adhesion

Inactive Publication Date: 2017-11-10
SUZHOU RES INST SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the grain size of the strontium-containing phosphate conversion coating formed on the s...

Method used

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  • Preparation method of strontium-containing phosphate bioactivity conversion coating on titanium surface
  • Preparation method of strontium-containing phosphate bioactivity conversion coating on titanium surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of chemical conversion base liquid: sodium dihydrogen phosphate 0.1mol / L, strontium nitrate 0.4mol / L, sodium nitrite 0.05mol / L;

[0026] (2) adjust the pH value of the chemical conversion base solution to be 3.25;

[0027] (3) Using pure titanium as the substrate, pickling with 2wt% hydrofluoric acid at room temperature for 15s, then washing with water, and then activating with 3g / L colloidal titanium solution at room temperature for 30s;

[0028] (4) Soak the treated titanium substrate in the chemical conversion base solution, treat it in an ultrasonic field environment at 65°C for 15 minutes, and then let it stand in a water bath and heat it for 15 minutes;

[0029] (5) Rinse and dry the product obtained in step (4) to obtain a strontium-containing phosphate bioactive conversion film on the titanium surface.

Embodiment 2

[0031] (1) Preparation of chemical conversion base liquid: zinc dihydrogen phosphate 0.1mol / L, strontium nitrate 0.5mol / L, sodium nitrate 0.05mol / L;

[0032] (2) adjust the pH of the chemical conversion base solution to be 3.75;

[0033] (3) Using pure titanium as the substrate, pickling with 2wt% hydrofluoric acid at room temperature for 15s, then washing with water, and then activating with 3g / L colloidal titanium solution at room temperature for 30s;

[0034] (4) Soak the treated titanium substrate in the chemical conversion base solution, treat it in an ultrasonic field environment at 65°C for 20 minutes, and then let it stand in a water bath and heat it for 20 minutes;

[0035] (5) Rinse and dry the product obtained in step (4) to obtain a strontium-containing phosphate bioactive conversion film on the titanium surface.

Embodiment 3

[0037] (1) Preparation of chemical conversion base liquid: sodium dihydrogen phosphate 0.1mol / L, strontium nitrate 0.6mol / L, calcium nitrate 0.05mol / L;

[0038] (2) adjust the pH value of the chemical conversion base solution to 4.50;

[0039] (3) Using pure titanium as the substrate, pickling with 2wt% hydrofluoric acid at room temperature for 20s, then washing with water, and then activating with 3g / L colloidal titanium solution at room temperature for 30s;

[0040] (4) Soak the treated titanium substrate in the chemical conversion base solution, treat it in an ultrasonic field environment at 75°C for 20 minutes, and then let it stand in a water bath and heat it for 20 minutes;

[0041] (5) Rinse and dry the product obtained in step (4) to obtain a strontium-containing phosphate bioactive conversion film on the titanium surface.

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Abstract

The invention relates to a preparation method of a strontium-containing phosphate bioactivity conversion coating on a titanium surface. According to the method, the strontium-containing phosphate bioactivity conversion coating with micron and nanoscale crystal structures grows on titanium and titanium alloy surfaces in situ directly by means of a phosphate chemical conversion technology. The method comprises the following steps: preparing a chemical conversion basic liquid containing phosphate ions, strontium ions and an accelerant; successively performing pickling, washing and surface activating on the surface of a titanium matrix; and immersing the treated titanium matrix in the chemical conversion basic liquid for chemical conversion treatment, wherein the conversion temperature is 55-75 DEG C and the conversion time is 20-50min. The strontium-containing phosphate bioactivity conversion coating on the titanium surface prepared by the method is in a porous multilayered micron and nanoscale crystal structure shape. The coating is primarily composed of strontium monophosphate strontium phosphate phases. The coating can effectively accelerate deposition of a hydroxyapatite phase in immersion in an in vitro simulation fluid.

Description

technical field [0001] The invention relates to a method for preparing a strontium-containing phosphate bioactive conversion film on a titanium surface, and belongs to the technical field of surface modification of biomedical metal materials. Background technique [0002] Titanium and its alloys are currently one of the most widely used metal implant materials in the biomedical field, and the research on their surface bioactive modification has been widely concerned. Strontium (Sr) is one of the essential trace elements in the human body, and its content in vertebrate bone tissue is about 0.01%, of which 99% exists in the bone. Studies have shown that strontium can regulate the differentiation of bone marrow mesenchymal stem cells into osteoblasts, and promote the synthesis and precipitation of bone matrix proteins, so strontium can promote osteoblast differentiation and osteogenesis. In addition, strontium also has significant effects in promoting bone conduction and treat...

Claims

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Application Information

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IPC IPC(8): C23C18/12C23C18/04A61L27/06A61L27/32A61L27/50A61L27/56
CPCC23C18/1204A61L27/06A61L27/32A61L27/50A61L27/56A61L2420/02A61L2420/06A61L2420/08C23C18/04
Inventor 肖桂勇刘冰吕宇鹏
Owner SUZHOU RES INST SHANDONG UNIV
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