Surface treatment method of silicon-doped calcium phosphate ceramics

A calcium-phosphorus ceramic and surface treatment technology, which is applied in the field of preparation of calcium-phosphorus ceramics, can solve problems such as complicated processing technology, and achieve the effects of simple process, improved adhesion, and improved osteoinductive ability.

Active Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, methods for improving the surface morphology of materials include plasma spraying, electrochemical deposition, micro-arc oxidation, hydrothermal-electrochemical co-deposition, and biomimetic mineralization. The above methods can significantly improve the surface properties of materials, but the treatment Complex process

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  • Surface treatment method of silicon-doped calcium phosphate ceramics
  • Surface treatment method of silicon-doped calcium phosphate ceramics
  • Surface treatment method of silicon-doped calcium phosphate ceramics

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Embodiment 1

[0038] The surface treatment method of the silicon-doped calcium-phosphorus ceramics (the silicon doping amount is 1.5wt%) of this embodiment includes the following steps:

[0039] (1) Prepare 0.5mol / L Ca(NO 3 ) 2 solution and 0.25mol / L (NH 4 ) 3 PO 4 Solution, as calcium source and phosphorus source respectively, the consumption control Ca / (P+Si) mol ratio of adjusting calcium source and phosphorus source is 1.67; Regulate calcium source pH with ammonia water and be greater than 10, phosphorus source pH is greater than 9, and dispersing agent poly Ethylene glycol (6000) was added to the calcium source and stirred for 30 minutes, and tetraethyl orthosilicate was added to the phosphorus source and stirred for 30 minutes; then the phosphorus source was added dropwise to the calcium source, and after the addition was completed, continue to stir for 0.5 hours, and then transferred to the stainless steel Reaction kettle, heated at 160°C for 6 hours, centrifugally washed, dried ...

Embodiment 2

[0042] The surface treatment method of the silicon-doped calcium-phosphorus ceramics (the silicon doping amount is 2wt%) of this embodiment includes the following steps:

[0043] (1) Prepare 0.5mol / L Ca(NO 3 ) 2 solution and 0.25mol / L (NH 4 ) 3 PO 4Solution, as calcium source and phosphorus source respectively, the consumption control Ca / (P+Si) mol ratio of adjusting calcium source and phosphorus source is 1.67; Regulate calcium source pH with ammonia water and be greater than 10, phosphorus source pH is greater than 9, and dispersing agent poly Add ethylene glycol (6000) to the calcium source and stir for 30 minutes, add tetraethyl orthosilicate to the phosphorus source and stir for 30 minutes; then add the phosphorus source to the calcium source drop by drop, continue stirring for 1 hour after the addition, and then transfer to stainless steel for reaction Kettle, heated at 200°C for 10 hours, centrifugally washed, dried overnight at 100°C, and ground to obtain nano-hydr...

Embodiment 3

[0046] The surface treatment method of the silicon-doped calcium-phosphorus ceramics (the silicon doping amount is 4wt%) of this embodiment includes the following steps:

[0047] (1) Prepare 0.5mol / L Ca(NO 3 ) 2 solution and 0.25mol / L (NH 4 ) 3 PO 4 Solution, as calcium source and phosphorus source respectively, the consumption control Ca / (P+Si) mol ratio of adjusting calcium source and phosphorus source is 1.67; Regulate calcium source pH with ammonia water and be greater than 10, phosphorus source pH is greater than 9, and dispersing agent poly Add ethylene glycol (6000) to the calcium source and stir for 30 minutes, add tetraethyl orthosilicate to the phosphorus source and stir for 30 minutes; add the phosphorus source to the calcium source drop by drop, continue stirring for 1 hour after the dropwise addition, and then transfer to a stainless steel reaction kettle , heated at 180°C for 8 hours, centrifuged and washed, dried overnight at 70°C, and ground to obtain nano-...

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Abstract

The invention discloses a surface treatment method of silicon-doped calcium phosphate ceramics. The surface treatment method is to perform surface hydro-thermal treatment to the silicon-doped calcium phosphate ceramics and comprises the steps of: placing the silicon-doped calcium phosphate ceramics into a sterilization boiler, treating for 0.5-2h at a temperature of 100-180 DEG C, washing by deionized water, drying and thus obtaining the silicon-doped calcium phosphate ceramics with hydroxylapatite crystal whiskers grown on the surface. The surface treatment method provided by the invention is simple in process, and can obtain the hydroxylapatite crystal whiskers which are controllable in size and have the diameters in micron level to nanometer level.

Description

technical field [0001] The invention relates to the preparation of calcium-phosphorus ceramics, in particular to a surface treatment method for silicon-doped calcium-phosphorus ceramics. Background technique [0002] Calcium-phosphorus ceramics have good biocompatibility and osteoinductive and osteoconductive properties and are widely used as alternative materials. The main inorganic component in natural bone is not stoichiometric hydroxyapatite (HA), but varying degrees of Ca deficiency 2+ 、PO 4 3- or OH - the ha. Different content of anion Cl - , F - , CO 3 2- (A position) will partially replace the position of OH- in the apatite lattice, SiO 4 4- , CO 3 2- (B site) partially replaces PO in the apatite lattice 4 3- ; Cation Na + , M g 2+ 、K + 、Sr 2+ , Zn 2+ 、Ba 2+ 、Cu 2+ 、Al 3+ and Fe 2+ Partial replacement of Ca in the apatite lattice 2+ Position, ion substitution can significantly affect the biological activity, solubility, grain size, morphology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 邓春林郑艳霞邱萱董刚王迎军吴刚
Owner SOUTH CHINA UNIV OF TECH
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