A kind of medical nickel-titanium alloy material with temperature-sensitive hydrogel coating and its preparation method and application
A temperature-sensitive hydrogel and nickel-titanium alloy technology, applied in coatings, pharmaceutical formulations, medical science, etc., can solve problems such as poor mechanical properties and inability to use medical implant materials, and achieve improved binding force, excellent anti-corrosion Bacterial performance, the effect of inhibiting dissolution
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Embodiment 1
[0047] (1) Material pretreatment: the medical nickel-titanium alloy (nickel, titanium atomic ratio is 1:1) material is processed by wire cutting into The flake samples are pickled. During pickling, the pickling solution is composed of HF with a mass fraction of 40%, HNO with a mass fraction of 60%. 3 and H 2 O mixed, pickling time is 10min; HF, HNO 3 and H 2 The volume ratio of O was 1:5:35, washed and dried, and ultrasonically cleaned with deionized water for 10 min, and dried at room temperature for later use, abbreviated as "NiTi".
[0048] (2) Anodizing: HNO with a concentration of 1mol / L 3 The solution is used as the electrolyte, the nickel-titanium alloy treated in step 1 is used as the anode, the graphite sheet is used as the cathode, the distance between the two electrodes is set to 40 mm, and the oxidation is performed at 6V for 2 minutes. After the reaction, the nickel-titanium alloy is taken out and rinsed with deionized water for several times After that, it...
Embodiment 2
[0054] (1) Material pretreatment: the medical nickel-titanium alloy (nickel, titanium atomic ratio is 1:1) material is processed by wire cutting into The flake samples are pickled. During pickling, the pickling solution is composed of HF with a mass fraction of 40%, HNO with a mass fraction of 60%. 3 and H 2 O mixed, pickling time 5min; HF, HNO 3 and H 2 The volume ratio of O is 5:10:35. Wash and dry, and ultrasonically clean with deionized water for 10 min, and dry at room temperature before use.
[0055] (2) Anodizing: HNO with a concentration of 2.5mol / L 3 The solution is used as the electrolyte, the nickel-titanium alloy treated in step 1 is used as the anode, the graphite sheet is used as the cathode, the distance between the two electrodes is set to 40 mm, and the oxidation is performed at 2V for 90 minutes. After the reaction, the nickel-titanium alloy is taken out and rinsed with deionized water for several times After that, it was ultrasonicated in deionized w...
Embodiment 3
[0061] (1) Material pretreatment: the medical nickel-titanium alloy (nickel, titanium atomic ratio is 1:1) material is processed by wire cutting into The flake samples are pickled. During pickling, the pickling solution is composed of HF with a mass fraction of 40%, HNO with a mass fraction of 60%. 3 and H 2 O mixed, pickling time is 5min; HF, HNO 3 and H 2 The volume ratio of O is 3:5:60. Wash and dry, and ultrasonically clean with deionized water for 10 min, and dry at room temperature before use.
[0062] (2) Anodizing: HNO with a concentration of 2.5mol / L 3 The solution is used as the electrolyte, the nickel-titanium alloy treated in step 1 is used as the anode, the graphite sheet is used as the cathode, the distance between the two electrodes is set to 40 mm, and the oxidation is performed at 5V for 20 minutes. After the reaction, the nickel-titanium alloy is taken out and rinsed with deionized water for several times After that, it was ultrasonicated in deionized...
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