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Preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface

A technology of micro-arc oxidation and biological coating, which is applied in the direction of surface reaction electrolytic coatings, coatings, electrolytic coatings, etc., can solve the problems of micro-arc oxidation coatings being easily corroded, coating biological activity failure, etc., to facilitate the industry The effect of modernized production, simple and easy method, and expanding the scope of application

Active Publication Date: 2013-04-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the micro-arc oxidation coating prepared by the existing method is easily corroded when soaked in body fluid, which leads to the failure of biological activity in the coating, and to provide a hydrophobic micro-arc oxidation biological coating on titanium surface preparation method

Method used

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  • Preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface
  • Preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface
  • Preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface

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specific Embodiment approach 1

[0017] Specific embodiment one: the preparation method of a kind of hydrophobic micro-arc oxidation biological coating on the surface of titanium according to the present embodiment is carried out according to the following steps:

[0018] 1. Titanium sample surface pretreatment: use 200#, 600#, 1000# and 1500# sandpaper to polish the titanium sample in sequence, and then use acetone, 95% ethanol solution and deionized water in sequence Ultrasonic cleaning for 5 minutes, and then drying in a 40°C oven for 30 minutes;

[0019] 2. Prepare the micro-arc oxidation electrolyte: use deionized water as the solvent to prepare the micro-arc oxidation electrolyte. Sodium silicate solution, calcium acetate solution with a concentration of 1~19g / L, calcium dihydrogen phosphate solution with a concentration of 2~15g / L, EDTA-2Na solution with a concentration of 5~30g / L and a concentration of 0.1~20g / L The sodium hydroxide solution of L is formed;

[0020] 3. Put the titanium sample pretre...

specific Embodiment approach 2

[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the micro-arc oxidation electrolytic solution described in step 2 takes deionized water as a solvent, and is a silver acetate solution with a concentration of 10 ~ 25g / L, with a concentration of 5~10g / L sodium silicate solution, 5~10g / L calcium dihydrogen phosphate solution, 5~15g / L calcium acetate solution, 10~20g / L EDTA-2Na solution and Sodium hydroxide solution with a concentration of 10~20g / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the micro-arc oxidation electrolyte described in step two uses deionized water as a solvent, and the concentration is 15 ~ 20g / L silver acetate solution , a sodium silicate solution with a concentration of 7.1g / L, a calcium dihydrogen phosphate solution with a concentration of 6.3g / L, a calcium acetate solution with a concentration of 8.8g / L, an EDTA-2Na solution with a concentration of 15g / L and a concentration of 15g / L sodium hydroxide solution. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface, which relates to the field of titanium surface modification and aims at solving the problem that when soaked in a body liquid, a micro-arc oxidation coating prepared by the traditional method is easy to corrode due to a small wetting angle, and therefore, the biological activity of the coating loses effectiveness. The preparation method provided by the invention comprises the steps of: 1, polishing and washing the surface of a titanium test sample; 2, preparing a micro-arc oxidation electrolyte; 3, carrying out micro-arc oxidation for 5-15 minutes under the conditions that the temperature of the electrolyte is 10 DEG C-60 DEG C, the impulse voltage is 250-550 V, the working efficiency is 200-1000Hz, and the duty ratio is 4-20 percent; and 4, washing and drying to obtain the coating. The preparation method provided by the invention is simple in technology, short in period, low in cost and is easy for large-scale generation of the coating. The preparation method is applied to the field of medical equipment.

Description

technical field [0001] The invention relates to the field of titanium surface modification, in particular to a method for preparing a hydrophobic micro-arc oxidation biological coating on a titanium surface. Background technique [0002] Wettability is an important characteristic of biological materials, which can be distinguished by hydrophilicity and hydrophobicity, and is an important parameter to characterize the surface free energy of materials. As the wettability of the material surface changes, the surface properties of the material change. Hydrophobic coatings can inhibit the corrosion of components in wet environments, thereby expanding the application fields of materials. At present, the surface corrosion protection methods of materials mainly include coating method and modification method. For example, coating the surface of a material with a metal or a protective film that can act as a barrier to avoid contact between the material and the corrosive environment....

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 魏大庆周睿成夙周玉
Owner HARBIN INST OF TECH
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