Method for preparing micro-nano composite structure on surface of medical titanium or titanium alloy
A composite structure, titanium alloy technology, applied in medical science, prosthesis, etc., can solve the problems of complex process, film adhesion, and limitations of coating methods
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Embodiment 1
[0025] The micro-nano composite structure is prepared on the surface of pure titanium by sandblasting and lye-acid treatment.
[0026] Put 10×10×1.2mm 3 The pure titanium sheet is polished step by step with 180, 500, 800, 1200 sandpaper, and ultrasonically cleaned with acetone, ethanol and deionized water in turn, and dried. On the sandblasting machine, alumina sand particles with a particle size of about 1mm are used for sandblasting at a pressure of 0.8MPa, the distance between the nozzle and the test piece is 10mm, the angle is 45°, and the time is 20s. After ultrasonic cleaning, the sand-blasted pure titanium sample was immersed in 5.0 mol / L NaOH solution, and reacted for 24 hours at 60°C in a water bath. After the reaction, the sample was taken out, immersed in deionized water, placed in 0.1 mol / L dilute hydrochloric acid, and left at room temperature for 12 hours. Then take out the sample, wash it with deionized water several times, and dry it.
[0027] The sandblasted surf...
Embodiment 2
[0032] The micro-nano composite structure was prepared on the surface of the titanium alloy TLM by sandblasting and lye-acid treatment.
[0033] Titanium alloy TLM is a metastable β-type titanium alloy independently developed by my country. It has the advantages of good biocompatibility, low elastic modulus (about 60GPa), and good process formability. Put 10×10×0.6mm 3 The titanium alloy TLM sheet is polished step by step with 180, 500, 800, 1200 sandpaper, and then ultrasonically cleaned with acetone, ethanol and deionized water, and dried. On the sandblasting machine, alumina sand particles with a particle size of about 1mm are used for sandblasting at a pressure of 0.8MPa, the distance between the nozzle and the test piece is 10mm, the angle is 45°, and the time is 20s. After ultrasonic cleaning, the sandblasted TLM alloy sample was immersed in a 2.5mol / L NaOH solution and reacted for 12h at 60°C in a water bath. After the reaction, the sample was taken out, immersed in deion...
Embodiment 3
[0040] The micro-nano composite structure is prepared on the surface of pure titanium by sandblasting and hydrothermal treatment.
[0041] Put 10×10×1.2mm 3 The pure titanium sheet is polished step by step with 180, 500, 800, 1200 sandpaper, and ultrasonically cleaned with acetone, ethanol and deionized water in turn, and dried. On the sandblasting machine, alumina sand particles with a particle size of about 1mm are used for sandblasting at a pressure of 0.8MPa, the distance between the nozzle and the test piece is 10mm, the angle is 45°, and the time is 20s. The blasted pure titanium sample was ultrasonically cleaned. Prepare a 1mol / L urea aqueous solution and add it to a hydrothermal reactor lined with a polytetrafluoroethylene container with a filling degree of about 70%. The pure titanium sample is immersed in it, and after packaging, it is treated in an oven at 120°C for 24 hours. . After the reaction, the sample was taken out and soaked in deionized water overnight.
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