Preparation method of carbonate hydroxyapatite/carbon nano tube composite coating material

A carbon nanotube composite, hydroxyapatite technology, applied in coatings, electrolytic coatings, medical science and other directions, can solve the problems of weak adhesion between the coating and the substrate, slow deposition speed, etc., and achieves low equipment investment and good mechanics. performance, the effect of excellent in vitro biological activity

Inactive Publication Date: 2012-07-04
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bioceramic coating prepared by the bionic method (patent CN 101249280A, 101244294A) has the advantages of excellent biocompatibility and osseointegration performance, mild reaction temperature, simple process, convenient operation, and low cost, but the deposition speed is slow and the coating Weak binding force with the matrix

Method used

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  • Preparation method of carbonate hydroxyapatite/carbon nano tube composite coating material
  • Preparation method of carbonate hydroxyapatite/carbon nano tube composite coating material
  • Preparation method of carbonate hydroxyapatite/carbon nano tube composite coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Metal substrate pretreatment: use medical pure titanium as the substrate, cut it into a block with a cross-section of 15mm×15mm, polish it with metallographic sandpaper until no obvious scratches are observed under an optical microscope, and clean it with acetone and distilled water; then At 1.0 mol / L H 3 PO 4 -1.5 wt% HF mixed solution soaked for 20 min; finally washed with distilled water, dried in an oven at 60 ° C for 24 h.

[0021] 2. Preparation of the suspension: add 1.225 g of amorphous calcium carbonate powder (4-5 μm in particle size) and 0.025 g of carbon nanotubes to 250 ml of absolute ethanol, oscillate ultrasonically for 1.0 h to form a stable suspension, drop before electrophoresis Add 0.5 ml of 1.0 mol / L hydrochloric acid.

[0022] 3. Electrophoretic deposition: take the medical pure titanium obtained in step 1 as the cathode and graphite as the anode, place them in the above suspension, control the electric field strength at 90 V / cm, and deposit ca...

Embodiment 2

[0029] 1. Pretreatment of the metal substrate: take the medical titanium alloy Ti6Al4V as the substrate, cut it into a block with a cross-section of 15mm×15mm, polish it with metallographic sandpaper until no obvious scratches are observed under an optical microscope, and clean it with acetone and distilled water; Then in 2.0 mol / L H 3 PO 4 -0.5 wt% HF mixed solution soaked for 5 min; finally washed with distilled water, dried in an oven at 60 ° C for 24 h.

[0030] 2. Preparation of suspension: add 2.25 g of shell powder (0.1-2 μm in particle size, 98% calcium carbonate content) and 0.25 g of carbon nanotubes into 250 ml of absolute ethanol solution, disperse for 2.0 h with ultrasonic vibration, and form a stable Suspension, add 0.5 ml of 1.0 mol / L hydrochloric acid dropwise before electrophoresis.

[0031] 3. Electrophoretic deposition: take the medical titanium alloy Ti6Al4V obtained in step 1 as the cathode and graphite as the anode, place them in the above suspension, c...

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Abstract

The invention relates to the fields of electrochemistry and materials and discloses a method for preparing a carbonate hydroxyapatite / carbon nano tube composite coating, which mainly comprises the following two steps: (1) depositing calcium carbonate powder or calcium carbonate-containing powder and carbon nano tubes on the surface of a metal matrix to obtain a calcium carbonate powder / carbon nano tube coating by electrophoretic deposition; and (2) treating the calcium carbonate powder / carbon nano tube coating with a phosphoric acid buffer solution, and converting the treated solution into the carbonate hydroxyapatite / carbon nano tube composite coating. The method is executed at normal temperature and pressure, has the advantages of simple process, low equipment investment and the like, and is suitable for preparing implants of various complicated shapes. The obtained composite coating has the fine bioactivity of the carbonate hydroxyapatite, and also can give full play to the favorable mechanical properties of the carbon nano tubes and the metal matrix.

Description

technical field [0001] The invention relates to the technical fields of electrochemistry, inorganic non-metallic materials and medical biomaterials, and discloses a carbonate-type hydroxyapatite / carbon nanotube composite coating material and a preparation method thereof. Background technique [0002] Carbonate-type hydroxyapatite is the main inorganic component of hard tissues such as human bones and teeth. It has the advantages of good biocompatibility, biological activity, no toxic side effects, and no immune response. Human bone cells can directly form a chemical bond on apatite, which has high bonding strength and good stability, and has been widely used in human hard tissue replacement materials and repair materials. However, carbonate-type hydroxyapatite has disadvantages such as low fracture toughness, high elastic modulus, and high brittleness. It can only be used in non-load-bearing materials such as alveolar ridge enhancement, ear ossicle replacement, and maxillofa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D13/02A61L27/42A61L27/32
Inventor 郭亚平姚勇波郭亚军褚联峰
Owner SHANGHAI NORMAL UNIVERSITY
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