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Method for depositing hydroxyapatite coating on surface of carbon/carbon composite material

A carbon composite material, hydroxyapatite technology, applied in electrolytic inorganic material coating, coating, medical science and other directions, can solve the problems of poor cohesive strength, low compactness, low bonding strength, etc., and achieve good compactness. , The product has excellent performance and meets the effect of clinical application

Inactive Publication Date: 2018-12-25
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material, aiming at solving the problem of low compactness and bonding of the hydroxyapatite coating on the surface of the existing carbon / carbon composite material. Problems such as low strength and poor cohesive strength

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  • Method for depositing hydroxyapatite coating on surface of carbon/carbon composite material
  • Method for depositing hydroxyapatite coating on surface of carbon/carbon composite material
  • Method for depositing hydroxyapatite coating on surface of carbon/carbon composite material

Examples

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Embodiment 1

[0052] A method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material, comprising the steps of:

[0053] (1) Surface treatment of carbon / carbon composite material: put the carbon / carbon composite material into ammonium persulfate solution with a concentration of 1M, and conduct hydrothermal treatment at 160°C for 12h;

[0054] (2) Preparation of electrolyte: take 32mL of lactic acid, add 600mL of distilled water and stir evenly, and prepare a lactic acid solution with a concentration of 0.68M;

[0055] According to the mass ratio of calcium hydroxide and lactic acid solution being 1:57, weigh anhydrous calcium hydroxide powder, slowly add it to the above-mentioned lactic acid solution, stir continuously until it is clear and transparent to obtain the first mixed solution;

[0056] According to the calcium-phosphorus atomic ratio of 1.67±0.05, measure phosphoric acid, dissolve it in distilled water, and prepare a phosphoric acid solution w...

Embodiment 2

[0065] A method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material, comprising the steps of:

[0066] (1) Surface treatment of carbon / carbon composite material: place the carbon / carbon composite material in ammonium persulfate solution with a concentration of 1M, and perform hydrothermal treatment at 160°C for 12h;

[0067] (2) Preparation of electrolyte: take 32mL of lactic acid, add 600mL of distilled water and stir evenly, and prepare a lactic acid solution with a concentration of 0.68M;

[0068] According to the mass ratio of calcium hydroxide and lactic acid solution being 1:57, weigh anhydrous calcium hydroxide powder, slowly add it to the above-mentioned lactic acid solution, stir continuously until it is clear and transparent, and obtain the first mixed solution;

[0069] According to the calcium-phosphorus atomic ratio of 1.67±0.05, measure phosphoric acid, dissolve it in distilled water, and prepare a phosphoric acid solution...

Embodiment 3

[0078] A method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material, comprising the steps of:

[0079] (1) Surface treatment of carbon / carbon composite material: place the carbon / carbon composite material in ammonium persulfate solution with a concentration of 1M, and perform hydrothermal treatment at 160°C for 12h;

[0080] (2) Preparation of electrolyte: take 32mL of lactic acid, add 600mL of distilled water and stir evenly, and prepare a lactic acid solution with a concentration of 0.68M;

[0081] According to the mass ratio of calcium hydroxide and lactic acid solution being 1:57, weigh anhydrous calcium hydroxide powder, slowly add it to the above-mentioned lactic acid solution, stir continuously until it is clear and transparent, and obtain the first mixed solution;

[0082] According to the calcium-phosphorus atomic ratio of 1.67±0.05, measure phosphoric acid, dissolve it in distilled water, and prepare a phosphoric acid solution...

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Abstract

The invention relates to the technical field of carbon / carbon composite materials, and particularly provides a method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material. The method at least includes the following steps that S01, the carbon / carbon composite material is used as a cathode, and a mixed solution containing calcium hydroxide, organic acid and phosphoric acid is used as a electrolyte to conduct hydrothermal electrodeposition reaction, so that the surface of the carbon / carbon composite material is deposited with an anhydrous calcium hydrophosphate coating; and S02, the carbon / carbon composite material obtained in the step S01 is placed in an alkali solution to be subjected to hydrothermal treatment, and thus the anhydrous calcium hydrophosphate coating is subjected to in-situ topology to be transformed into the hydroxyapatite coating. According to the method for depositing the hydroxyapatite coating on the surface of the carbon / carboncomposite material, the bonding strength of the prepared HA coating and the C / C composite material reaches no less than 20N, and the shearing strength can reach no less than 75.8 MPa; and the method for depositing the hydroxyapatite coating on the surface of the carbon / carbon composite material has simple process, high efficiency and excellent product performance, can meet the needs of clinical application, and is worthy of being popularized and used.

Description

technical field [0001] The invention belongs to the technical field of carbon / carbon composite materials, and in particular relates to a method for depositing a hydroxyapatite coating on the surface of a carbon / carbon composite material. Background technique [0002] Carbon / carbon (C / C) composites have an elastic modulus and bending strength that match those of human bones, and can effectively avoid the "stress shielding" effect, so they are considered to be a human hard tissue replacement material with great application potential. However, due to the biological inertia of the surface of C / C composites, the regeneration of bone tissue cannot be induced. [0003] Coating bioactive coatings on the surface of C / C composites is an effective measure to improve the bioinertness of C / C composites. Currently commonly used bioactive coating materials include calcium hydrogen phosphate dihydrate, fluorapatite, and hydroxyapatite (HA). Among them, the hydroxyapatite (HA or HAP) mater...

Claims

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Application Information

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IPC IPC(8): C25D9/08C25D5/50A61L27/08A61L27/32A61L27/50
CPCC25D9/08A61L27/08A61L27/32A61L27/50A61L2420/02A61L2430/02C25D5/50
Inventor 熊信柏于朔刘玲马俊曾燮榕
Owner SHENZHEN UNIV
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