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先用10mol/L的NaOH溶液处理镍钛片,随后采用电沉积法制备羟基磷灰石涂层。电沉积工艺参数为:硝酸钙0.042mol/L,磷酸二氢铵0.025mol/L,EDTA-2Na1.5×10-4mol/L,温度65℃,pH4.5,电流密度1mA/cm2,时间1h。采用扫描电镜、红外光谱仪和能谱仪对所得涂层进行表征。NaOH溶液处理有利于羟基磷灰石的生长。溶液中EDTA-2Na的存在不影响羟基磷灰石的生成,只是促使羟基磷灰石末端聚拢,使羟基磷灰石之间的空隙扩大,并减少涂层的CO3-2含量,增加OH-,有效减少了涂层的镍含量。
Nickel-titanium sheets were first treated with 10 mol / L NaOH solution and then hydroxyapatite coatings were prepared by electrodeposition. The parameters of electrodeposition were 0.042mol / L of calcium nitrate, 0.025mol / L of ammonium dihydrogen phosphate and 1.5 × 10-4mol / L of EDTA-2Na, the temperature was 65 ℃, the pH was 4.5, the current density was 1mA / cm2 and the time was 1h . The resulting coating was characterized by scanning electron microscopy, infrared spectroscopy and energy dispersive spectroscopy. NaOH solution is conducive to the growth of hydroxyapatite. The presence of EDTA-2Na in the solution did not affect the formation of hydroxyapatite, but prompted the end of hydroxyapatite gather, the gap between the hydroxyapatite expanded, and reduce the coating CO3-2 content, increase OH-, Effectively reduce the nickel content of the coating.