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A method for preparing hydroxyapatite coating on the surface of carbon nanotubes based on electrochemical deposition method and biomineralization method

A technology of hydroxyapatite and hydroxyapatite, which is applied in the field of carbon nanotube surface treatment technology, can solve the problems of difficult coating preparation, hydrophobicity, large length and diameter, and agglomeration, so as to achieve low production cost, Shape-controllable and easy-to-manipulate effects

Active Publication Date: 2020-06-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the existing coating preparation method is: due to the chemical inertness, hydrophobicity and large length-diameter ratio of CNT, it is easy to agglomerate, which makes it difficult to directly realize the preparation of coating on the surface of CNT.

Method used

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  • A method for preparing hydroxyapatite coating on the surface of carbon nanotubes based on electrochemical deposition method and biomineralization method
  • A method for preparing hydroxyapatite coating on the surface of carbon nanotubes based on electrochemical deposition method and biomineralization method
  • A method for preparing hydroxyapatite coating on the surface of carbon nanotubes based on electrochemical deposition method and biomineralization method

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Effect test

Embodiment 1

[0049] refer to figure 2 and image 3 A method for preparing a hydroxyapatite coating on the surface of a carbon nanotube based on an electrochemical deposition method and a composite biomineralization method of the present invention comprises the following steps:

[0050] Step 1: Clean and acidify the carbon nanotubes in sequence:

[0051] First, a certain amount of CNTs were washed in sequence with deionized water, absolute ethanol, and deionized water in an ultrasonic cleaner for 10 min each time. Then prepare concentrated H with a volume ratio of 3:1 2 SO 4 and concentrated HNO 3 Mix the solutions, put the cleaned CNTs into the prepared mixed acid solution, and treat them at a constant temperature at 60°C for 12 hours, take them out, wash them, and dry them for later use.

[0052] Step 2: Construct hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ) nucleation sites - small sized HA grains:

[0053] Conductive gel and flake graphite electrodes with acid-treated CNTs we...

Embodiment 2

[0059] refer to Figure 4 and Figure 5 A method for preparing a hydroxyapatite coating on the surface of a carbon nanotube based on an electrochemical deposition method and a composite biomineralization method of the present invention comprises the following steps:

[0060] Step 1: Clean and acidify the carbon nanotubes in sequence:

[0061] First, a certain amount of CNTs were washed in sequence with deionized water, absolute ethanol, and deionized water in an ultrasonic cleaner for 10 min each time. Then prepare concentrated H with a volume ratio of 3:1 2 SO 4 and concentrated HNO 3 Mix the solutions, put the cleaned CNTs into the prepared mixed acid solution, and treat them at a constant temperature at 60°C for 12 hours, take them out, wash them, and dry them for later use.

[0062] Step 2: Construct hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ) nucleation sites - small sized HA grains:

[0063] Conductive gel and flake graphite electrodes with acid-treated CNTs w...

Embodiment 3

[0069] refer to Image 6 and Figure 7 A method for preparing a hydroxyapatite coating on the surface of a carbon nanotube based on an electrochemical deposition method and a composite biomineralization method of the present invention comprises the following steps:

[0070] Step 1: Clean and acidify the carbon nanotubes in sequence:

[0071] First, a certain amount of CNTs were washed in sequence with deionized water, absolute ethanol, and deionized water in an ultrasonic cleaner for 10 min each time. Then prepare concentrated H with a volume ratio of 3:1 2 SO 4 and concentrated HNO 3 Mix the solutions, put the cleaned CNTs into the prepared mixed acid solution, and treat them at a constant temperature at 60°C for 12 hours, take them out, wash them, and dry them for later use.

[0072] Step 2: Construct hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ) nucleation sites - small sized HA grains:

[0073] Conductive gel and flake graphite electrodes with acid-treated CNTs we...

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Abstract

The invention discloses a method for preparing a hydroxyapatite coating on the surface of a carbon nanotube based on an electrochemical deposition method and a biomineralization method in a combined mode. The preparation method comprises the following steps that the carbon nanotube is cleaned, acidification treatment is conducted, and the carbon nanotube subjected to acidification treatment is washed and dried; nucleation sites of hydroxyapatite crystal grains are constructed on the surface of the carbon nanotube subjected to acidification treatment through a cathodic electrochemical deposition method; the carbon nanotube with the nanotube sites of the hydroxyapatite crystal grains is washed and dried; a hydroxyapatite coating is grown in situ on the surface of the dried carbon nanotube with the crystal grain nucleation sites through the biomineralization method; and the carbon nanotube with the crystal grain nucleation sites is soaked in a simulated body fluid solution when the dryingprocess is going to be completed. Through the preparation method, the HA coating can be prepared on the surface of the nano-scale CNT, the interface bonding property between the CNT and the HA matrixmaterial can be improved, and thus effect of enhancing the toughness of the CNT on the HA matrix material is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube surface treatment technology, and in particular relates to a method for preparing a hydroxyapatite coating on the surface of carbon nanotubes based on an electrochemical deposition method and a composite biomineralization method. Background technique [0002] Carbon nanotubes (CNTs) are seamless hollow tubes formed by curling a graphite-like hexagonal network structure, with a unique one-dimensional nanostructure. It inherits the advantages of high strength, high elastic modulus, and excellent thermal and electrical conductivity of graphite, so the preparation of CNT-reinforced hydroxyapatite (HA) composites using CNT as a reinforcing material has been extensively studied in recent years. However, the surface of CNT is biologically inert, has strong hydrophobicity and chemical inertness, and is easily oxidized to cause structural damage. When CNT and HA materials are combined, the interfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/08C23C18/16C23C28/04
CPCC23C18/1639C23C18/1653C23C28/04C25D9/08
Inventor 赵雪妮刘庆瑶张黎张伟刚王瑶杨建军何富珍郑佳梅
Owner SHAANXI UNIV OF SCI & TECH
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