Bionic preparing method for depositing calcium and phosphor active layer on memory alloy of nickel and titanium for medical use
A nickel-titanium memory alloy, surface deposition technology, applied in coatings, medical science, prosthesis, etc., can solve the problem of low biological activity, achieve high bonding strength, easy promotion, and improved surface biocompatibility
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Embodiment 1
[0022] Adopt the method of the present invention to prepare by calcium phosphate amorphous transition layer and doped CO 3 2- The calcium-phosphorous bioactive layer is composed of the ionic bone-like apatite crystal phase surface layer. Its preparation process is as follows:
[0023] Step 1. Nickel-titanium alloy surface activation treatment
[0024] Select medical grade NiTi shape memory alloy with 50% Ni atomic percentage, and process it into 10×10×0.3mm 3 thin ribbon. After the nickel-titanium alloy was ultrasonically cleaned with acetone, 70% alcohol, and distilled water in sequence, it was cleaned in boiling H at a concentration of 20%. 2 o 2 Treat in aqueous solution for 30 minutes, take it out and rinse with distilled water; then soak in 50°C, 4M NaOH aqueous solution for 24 hours, take out distilled water to rinse, and dry at 70°C.
[0025] Step 2. "Two-step biomimetic deposition process" of calcium-phosphorus active coating
[0026] (1) Preparation of biomimet...
Embodiment 2
[0033] The method of the invention is used to prepare a calcium phosphorus biologically active layer composed of a calcium phosphate amorphous transition layer and an octacalcium phosphate crystal phase surface layer on the surface of the tubular medical nickel-titanium memory alloy. Its preparation process is as follows:
[0034] Step 1. Nickel-titanium alloy surface activation treatment
[0035] A medical-grade NiTi shape-memory alloy pipe material with an atomic percentage of Ni of 50% is selected, and its inner diameter is 5 mm, its thickness is 1 mm, and its length is 10 mm. After the nickel-titanium alloy pipe was ultrasonically cleaned with acetone, 70% alcohol, and distilled water in sequence, it was cleaned in boiling H at a concentration of 20%. 2 o 2 Treat in aqueous solution for 45 minutes, take it out and rinse with distilled water; then soak in 60°C, 3M NaOH aqueous solution for 12 hours, take out distilled water and rinse, and dry at 100°C.
[0036] Step 2. "...
Embodiment 3
[0044] The method of the present invention is used to prepare an amorphous transition layer made of calcium phosphate and doped CO on the surface of the tubular medical nickel-titanium memory alloy. 3 2- The calcium-phosphorous bioactive layer is composed of the ionic bone-like apatite crystal phase surface layer. Its preparation process is as follows:
[0045] Step 1. Nickel-titanium alloy surface activation treatment
[0046] A medical-grade NiTi shape-memory alloy pipe material with an atomic percentage of Ni of 50% is selected, and its inner diameter is 5 mm, its thickness is 1 mm, and its length is 10 mm. After the nickel-titanium alloy pipe was ultrasonically cleaned with acetone, 70% alcohol, and distilled water in sequence, it was cleaned in boiling H at a concentration of 20%. 2 o 2 Treat in aqueous solution for 30 minutes, take it out and rinse with distilled water: then soak in 50°C, 4M NaOH aqueous solution for 24 hours, take out distilled water and rinse, and ...
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