Preparation method of HA nano array bioactive coating
A bioactive, nano-array technology, applied in the field of surface modification of titanium and titanium alloy components, can solve the problems of high cost, poor bonding strength, complex process, etc., achieve a high degree of lattice matching, ensure coating adhesion and Strong, highly bioactive effect
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[0025] A preparation method of HA nano-array bioactive coating, comprising the following steps:
[0026] Step 1: using deionized water as a solvent and sodium hydroxide or potassium hydroxide as a solute to prepare lye, wherein the concentration of sodium hydroxide or potassium hydroxide is 1-10 mol / L. Soak the polished titanium sheet in alkaline solution and place it in a constant temperature box at 30-40°C for pretreatment, and the reaction time is 1-2h. After the reaction is over, a reticular titanate coating is obtained;
[0027] Step 2: Utilize solvothermal method, take deionized water as solvent, take calcium salt and phosphorus salt as solute (wherein, calcium salt is calcium sodium edetate, phosphorus salt is diammonium hydrogen phosphate, ammonium hydrogen phosphate or diammonium hydrogen phosphate or diammonium hydrogen phosphate mixture of those), the concentration of calcium salt is 0.167-0.334mol / L, and the concentration of phosphorus salt is 0.1mol / L. Adjust th...
Embodiment 1
[0030] Step 1: Prepare 10mol / L lye with deionized water as solvent and sodium hydroxide as solute. Soak the polished titanium sheet in alkaline solution and place it in a thermostat at 37°C for pretreatment. The reaction time is 1h. After the reaction, the netted Na 2 Ti 3 o 7 coating;
[0031] Step 2: Prepare 15ml of solution with calcium sodium edetate and diammonium hydrogen phosphate as solute, wherein the concentration of calcium sodium edetate is 0.2338mol / L, and the concentration of diammonium hydrogen phosphate is 0.1mol / L L. The pH of the solution was adjusted to 12.5 with sodium hydroxide lye. The above solution was transferred into a 50mL high temperature and high pressure reactor, and then the pretreated sample was placed in the reactor and kept at 240°C for 20h to prepare a HA nanoarray with a diameter of about 30nm.
[0032] From figure 1 It can be seen that the surface of the pretreated titanium alloy has a network structure and is evenly distributed. co...
Embodiment 2
[0034] The first step: use deionized water as solvent and potassium hydroxide as solute to prepare 1mol / L lye. Soak the polished titanium sheet in alkaline solution and place it in a constant temperature box at 40°C, and the reaction time is 2h. After immersion, get the network K 2 Ti 3 o 7 coating;
[0035] Step 2: prepare 15ml of solution using calcium sodium ethylenediaminetetraacetic acid, diammonium hydrogen phosphate and ammonium hydrogen phosphate mixture as solute, and use solvothermal method, wherein the concentration of calcium sodium edetate is 0.167mol / L, phosphoric acid The concentration of the mixture of diammonium hydrogen and ammonium hydrogen phosphate is 0.1mol / L. Adjust the pH of the solution to 11. The above solution was transferred into a 50mL high temperature and high pressure reactor, and then the pretreated sample was placed in the reactor and kept at 180°C for 3 hours to prepare a HA nanoarray with a diameter of about 10nm.
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