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Titanium dioxide nanotube array-carbon nanotube-hydroxyapatite biological composite coating and preparation thereof

A nanotube array, hydroxyapatite technology, applied in the intersection of materials science and biomedicine, can solve the problem of insignificant overall effect, reduced biological activity and compatibility of the coating, and low bonding force between the coating and the substrate interface, etc. question

Inactive Publication Date: 2012-06-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the overall effect is not obvious, the interfacial bonding force between the coating and the substrate is still low, and the service life needs to be further extended, and the biological activity and compatibility of the coating are reduced due to the addition of various ceramic particles.

Method used

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  • Titanium dioxide nanotube array-carbon nanotube-hydroxyapatite biological composite coating and preparation thereof
  • Titanium dioxide nanotube array-carbon nanotube-hydroxyapatite biological composite coating and preparation thereof
  • Titanium dioxide nanotube array-carbon nanotube-hydroxyapatite biological composite coating and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The proportion of the carbon nanotube-hydroxyapatite composite powder is (wt%): 90% of the hydroxyapatite powder, and 10% of the carbon nanotube.

[0025] (1) Use metal platinum as the cathode, and use a titanium sheet with a smooth and traceless surface as the anode, anodize it in a 0.5wt% hydrofluoric acid solution for 20 minutes, then clean the titanium sheet and heat treat it at 450 ° C for 2 hours to obtain a surface with titanium dioxide nanoparticles. Titanium substrate for tube arrays. Scanning electron microscope observation of its surface morphology as figure 1 Shown (its tube diameter is about 100nm).

[0026] (2) Accurately weigh 63.466 grams of Ca (NO 3 ) 2 4H 2 O, 21.300 g (NH 4 ) 2 HPO 4 , were poured into 250ml of distilled water to make a solution. Accurately weigh 3 g of the treated carbon nanotubes, add Ca(NO 3 ) 2 solution, ultrasonically disperse for 30min, and transfer it to a three-necked flask, adjust the pH value to 10 with ammonia wat...

Embodiment 2

[0031] The proportion of the carbon nanotube-hydroxyapatite composite powder is (wt%): 80% of the hydroxyapatite powder and 20% of the carbon nanotube.

[0032] (1) Use metal platinum as the cathode, and use a titanium sheet with a smooth and traceless surface as the anode, anodize it in a 0.5wt% hydrofluoric acid solution for 20 minutes, then clean the titanium sheet and heat treat it at 450 ° C for 2 hours to obtain a surface with titanium dioxide nanoparticles. Titanium substrate for tube arrays.

[0033](2) Accurately weigh 56.414g of Ca(NO 3 ) 2 4H 2 O, 18.932 g (NH 4 ) 2 HPO 4 , were poured into 250ml of distilled water to make a solution. Accurately weigh 3 g of the treated carbon nanotubes, add Ca(NO 3 ) 2 solution, ultrasonically dispersed for 30 min, and transferred to a three-necked flask. Use ammonia water to adjust the pH value to 10-13, and (NH 4 ) 2 HPO 4 The solution was dripped into a three-necked flask under constant stirring for 1 hour, and kept ...

Embodiment 3

[0038] The proportion of the carbon nanotube-hydroxyapatite composite powder is (wt%): 70% of the hydroxyapatite powder, and 30% of the carbon nanotube.

[0039] (1) Use metal platinum as the cathode, and use a titanium sheet with a smooth and traceless surface as the anode, anodize it in a 0.5wt% hydrofluoric acid solution for 20 minutes, then clean the titanium sheet and heat treat it at 450 ° C for 2 hours to obtain a surface with titanium dioxide nanoparticles. Titanium substrate for tube arrays.

[0040] (2) Accurately weigh 49.363 grams of Ca(NO 3 ) 2 4H 2 O, 16.566 g (NH 4 ) 2 HPO 4 , were poured into 250ml of distilled water to make a solution. Accurately weigh 3 g of the treated carbon nanotubes, add Ca(NO 3 ) 2 solution, ultrasonically dispersed for 30 min, and transferred to a three-necked flask. Use ammonia water to adjust the pH value to 10-13, and (NH 4 ) 2 HPO 4 The solution was dripped into the reaction vessel under constant stirring for 1 hour, and...

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Abstract

The invention discloses a titanium dioxide nanotube array-carbon nanotube-hydroxyapatite biological composite coating, which is prepared by uniformly covering carbon nanotubes and hydroxyapatite on a titanium substrate with a titanium dioxide nanotube array on the surface and is characterized in that the titanium dioxide nanotube array has the tube diameter of (100+ / -20) nm and are uniformly arranged; and hydroxyapatite accounts for 70-99.9wt% and the carbon nanotubes account for 0.1-30wt%. The composite coating has good mechanical properties and biocompatibility, has the interface binding strength of 31-48 MPa, and can be used for surface modification of titanium and titanium alloy so as to prolong the service life of titanium and titanium alloy in a human body.

Description

technical field [0001] The invention belongs to the interdisciplinary field of material science and biomedicine, and in particular relates to a biological composite coating which uses a titanium plate with a uniform array of titanium dioxide nanotubes on its surface as a substrate, and is coated with hydroxyapatite and carbon nanotubes on its surface. and its preparation. Background technique [0002] Bioceramic coating is an important research content in the field of biomaterials. Hydroxyapatite has good biological activity and biocompatibility, and is often used as a bioceramic coating material. Its preparation method is mainly plasma spraying, but most of the hydroxyapatite in the coating obtained after high-temperature plasma spraying has been decomposed, which greatly reduces its biological activity and biocompatibility. Large residual stress results in low interface binding force with the substrate, and it tends to fall off easily under the action of human body fluids...

Claims

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Application Information

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IPC IPC(8): B32B9/04B81C1/00
Inventor 李爱民孙康宁孙晓林
Owner SHANDONG UNIV
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