Titanium surface micro-nano zinc phosphate strontium chemical conversion film and controllable preparation method thereof

A chemical conversion film and chemical conversion technology, which is applied in the field of micro-nano structure zinc strontium phosphate chemical conversion film on the surface of titanium and its controllable preparation, can solve the problem that it is difficult to form a mixture of zinc strontium phosphate, achieve improved clinical application effect, and simple process , low cost effect

Active Publication Date: 2019-07-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors found that zinc phosphate and strontium phosphate have large differences in thermodynamic parameters such as solubility product constant and chemical reaction equilibrium constant. Generally, when directly synthesized by chemical reaction, zinc phosphate will preferentially precipitate out, making it difficult to form Zinc strontium phosphate mixed phase

Method used

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  • Titanium surface micro-nano zinc phosphate strontium chemical conversion film and controllable preparation method thereof
  • Titanium surface micro-nano zinc phosphate strontium chemical conversion film and controllable preparation method thereof
  • Titanium surface micro-nano zinc phosphate strontium chemical conversion film and controllable preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Weigh SrCl 2 ·6H 2 O 32g, NaH 2 PO 4 2H 2 O 14g, Zn(H 2 PO 4 ) 2 2H 2 O 10g, NaNO 3 2g, dissolved in 1L deionized water and mixed evenly to obtain the chemical transformation base liquid;

[0048] (2) Weigh 5g of reduced iron powder, and use 7% v / v H 3 PO 4 After pickling for 5 minutes, add it to the chemical conversion base solution, let it stand at room temperature for aging for 24 hours, and filter the supernatant to obtain the aging solution;

[0049] (3) with 10wt% H 3 PO 4 Or 5mol / L NaOH solution to adjust the pH value of the curing solution to 3.25;

[0050] (4) Clean the polished pure titanium substrate sequentially with acetone, ethanol, and deionized water at room temperature for 10 minutes, then treat it with 2wt% hydrofluoric acid for 30 seconds at room temperature, and place it in 3 g / L colloidal titanium after washing. Activation treatment at room temperature for 30s in the solution;

[0051] (5) Coupling the pure titanium substrate tre...

Embodiment 2

[0054] (1) Weigh SrCl 2 ·6H 2 O 32g, NaH 2 PO 4 2H 2 O 14g, Zn(H 2 PO 4 ) 2 2H 2 O 2g, NaNO 3 2g, dissolved in 1L deionized water and mixed evenly to obtain the chemical transformation base liquid;

[0055] (2) Weigh 5g of reduced iron powder, and use 7% v / v H 3 PO 4 After pickling for 5 minutes, add it to the chemical conversion base solution, let it stand at room temperature for aging for 24 hours, and filter the supernatant to obtain the aging solution;

[0056] (3) with 10wt% H 3 PO 4 Or 1mol / L NaOH solution to adjust the pH value of the curing solution to 3.25;

[0057] (4) Clean the polished pure titanium substrate sequentially with acetone, ethanol, and deionized water at room temperature for 10 minutes, then treat it with 2wt% hydrofluoric acid for 30 seconds at room temperature, and place it in 3 g / L colloidal titanium after washing. Activation treatment at room temperature for 30s in the solution;

[0058] (5) Coupling the pure titanium substrate trea...

Embodiment 3

[0061] (1) Weigh SrCl 2 ·6H 2 O 32g, NaH 2 PO 4 2H 2 O 14g, Zn(H 2 PO 4 ) 2 2H 2 O 1g, NaNO 3 2g, dissolved in 1L deionized water and mixed evenly to obtain the chemical transformation base liquid;

[0062] (2) Weigh 5g of reduced iron powder, and use 7% v / v H 3 PO 4 After pickling for 5 minutes, add it to the chemical conversion base solution, let it stand at room temperature for aging for 24 hours, and filter the supernatant to obtain the aging solution;

[0063] (3) with 10wt% H 3 PO 4 Or 1mol / L NaOH solution to adjust the pH value of the curing solution to 3.25;

[0064] (4) Clean the polished pure titanium substrate sequentially with acetone, ethanol, and deionized water at room temperature for 10 minutes, then treat it with 2wt% hydrofluoric acid for 30 seconds at room temperature, and place it in 3 g / L colloidal titanium after washing. Activation treatment at room temperature for 30s in the solution;

[0065] (5) Coupling the pure titanium substrate trea...

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Abstract

The invention discloses a titanium surface micro-nano zinc phosphate strontium chemical conversion film and controllable preparation method thereof. The method comprises the following steps of the chemical conversion solution is prepared, wherein the chemical conversion solution contains strontium ions, zinc ions, dihydrogen phosphate ions and an accelerant; carrying out iron powder curing treatment on the chemical conversion solution to obtain a curing solution; and coupling the cleaned and surface-activated titanium matrix with a pure iron clamp, and then soaking the titanium matrix and thepure iron clamp in a curing solution for chemical conversion treatment to obtain the chemical conversion film. The controllable preparation method of different micro-nano structures of the zinc-strontium-phosphate film layer is realized through the addition amount of the zinc-containing compound in the conversion solution and the regulation of the accelerator, the introduction of the biological functional element and the micro-nano structure regulation and control are combined, so that the early bone integration capability and the antibacterial property of the titanium-based implant are further improved, and the clinical application effect of the titanium-based implant is improved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of biomedical metal materials, and in particular relates to a titanium surface micronano structure zinc strontium phosphate chemical conversion film and a controllable preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Titanium and titanium alloys are widely used in the medical field as implant materials. However, as biologically inert materials, in long-term clinical applications, problems such as tissue infection around the implant and insufficient ability to promote bone formation have been exposed in the long-term clinical application. Surface modificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/22C23C22/80A61L31/02A61L31/14
CPCA61L31/022A61L31/14A61L2400/18C23C22/22C23C22/80
Inventor 肖桂勇左康卿吕宇鹏
Owner SHANDONG UNIV
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