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Preparation method of Zn-TiO2 coating

A technology of coating and steel sheet, applied in the field of preparation of Zn-TiO2 coating, can solve the problems of large difference of biological bone, large pore size, poor antibacterial effect, etc., and achieve the effect of promoting adhesion

Inactive Publication Date: 2020-04-07
沈兰兰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) The metal implants commonly used at present are inert materials, which need to be removed by secondary surgery after being used for bone repair
[0004] The Zn-TiO formed in the prior art The shortcoming of coating is: the first, in the prior art Zn-TiO The pore diameter of the coating is large, and the difference is bigger with biological bone; The antibacterial effect of the layer is poor; the 3rd, in the prior art Zn-TiO2The biocompatibility of coating is poor, can not well promote the adhesion, proliferation and differentiation of bone marrow stem cells

Method used

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  • Preparation method of Zn-TiO2 coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of Zn-TiO The preparation method of coating comprises the following steps:

[0030] Step 1: Pre-treatment: select steel sheets and zinc sheets of appropriate size, sand the steel sheets until they are smooth and bright, and have no obvious defects on the surface, then activate them in 15% HCl for 1 min, wash them with absolute ethanol, and then Immerse the zinc sheet in 15% HCl for activation for 5 seconds, and wash it with water;

[0031] Step 2: Zn-TiO2 preparation of the coating: the steel sheet and the zinc sheet processed in step 1 are placed in the electrolytic cell, and the electrolyte is filled in the electrolytic cell, and micro The arc oxidation reaction can obtain the Zn-TiO2 coating, and the Zn-TiO2 coating is attached to the surface of the steel sheet;

[0032] Step 3: Post-processing: Soak the Zn-TiO2-coated steel sheet electrolyzed in Step 2 in petroleum ether, clean it with an ultrasonic cleaner for 10 minutes, take it out, clean it with alcohol,...

Embodiment 2

[0047] A kind of Zn-TiO The preparation method of coating comprises the following steps:

[0048] Step 1: Pre-treatment: Select a steel sheet and a zinc sheet of a suitable size, sand the steel sheet until it is smooth and bright, and have no obvious defects on the surface, then activate it in 10% HCl for 0.5min, wash it with absolute ethanol, Then immerse the zinc flakes in 10% HCl to activate for 4s, and wash with water;

[0049] Step 2: Zn-TiO2 preparation of the coating: the steel sheet and the zinc sheet processed in step 1 are placed in the electrolytic cell, and the electrolyte is filled in the electrolytic cell, and micro The arc oxidation reaction can obtain the Zn-TiO2 coating, and the Zn-TiO2 coating is attached to the surface of the steel sheet;

[0050] Step 3: Post-processing: Soak the Zn-TiO2-coated steel sheet electrolyzed in step 2 in petroleum ether, clean it with an ultrasonic cleaner for 5 minutes, take it out, clean it with alcohol, and dry it with absorb...

Embodiment 3

[0065] A kind of Zn-TiO The preparation method of coating comprises the following steps:

[0066] Step 1: Pre-treatment: Select a steel sheet and a zinc sheet of a suitable size, sand the steel sheet until it is smooth and bright, and have no obvious defects on the surface, then activate it in 20% HCl for 2 minutes, wash it with absolute ethanol, and then Immerse the zinc sheet in 20% HCl for activation for 6 seconds, and wash it with water;

[0067] Step 2: Zn-TiO2 preparation of the coating: the steel sheet and the zinc sheet processed in step 1 are placed in the electrolytic cell, and the electrolyte is filled in the electrolytic cell, and micro The arc oxidation reaction can obtain the Zn-TiO2 coating, and the Zn-TiO2 coating is attached to the surface of the steel sheet;

[0068] Step 3: Post-processing: Soak the Zn-TiO2-coated steel sheet electrolyzed in Step 2 in petroleum ether, clean it with an ultrasonic cleaner for 20 minutes, take it out, clean it with alcohol, an...

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Abstract

The invention discloses a preparation method of a Zn-TiO2 coating. The preparation method comprises the following steps: taking a steel sheet and a zinc sheet with proper sizes, polishing the steel sheet with abrasive paper until the steel sheet is flat and bright and has no obvious defects on the surface, activating in HCl, washing with absolute ethyl alcohol, immersing the zinc sheet into HCl for activation and cleaning with water; and then placing the steel sheet and the zinc sheet in an electrolytic cell containing an electrolyte and performing micro-arc oxidation reaction under mechanicalstirring and a stable direct-current power source so as to obtain the Zn-TiO2 coating. The Zn-TiO2 coating is of a porous nano structure, the pore diameter is less than 5 microns, the diameter of nano particles is 20-100 nm, Zn exists in the form of ZnO and growth of staphylococcus aureus and escherichia coli on the surface can be remarkably inhibited.

Description

technical field [0001] The invention belongs to the field of coating preparation, in particular to a preparation method of Zn-TiO2 coating. Background technique [0002] With the development of science and technology, the aging of the population, and the increase in trauma caused by industry, transportation, and sports, people's demand for biomedical materials and their products is increasing. At present, most of the fracture internal fixation devices widely used clinically are made of stainless steel and titanium alloy. Compared with the above metal materials, magnesium alloy has the following advantages: (1) Other metal biomaterials may release toxic ions or particles after being corroded or worn in body fluids; while magnesium is one of the essential macroelements for the human body, it participates in A series of metabolic processes, accelerating bone healing, etc. (2) The elastic modulus (40-45 GP) of magnesium alloy is closer to that of human bone, which can effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/026C25D11/34
Inventor 沈兰兰
Owner 沈兰兰