AAO模板快速制备方法探究

Rapid Preparation of Anodic Aluminum Oxide Template

为了快速制备出高度有序且孔径可调控的AAO(阳极氧化铝)模板应用于工业生产,通过改进传统的两步阳极氧化法,采用逐步提高电解液浓度的硬氧氧化法制备了AAO模板,并确定了最佳制备工艺为初始电解液浓度0.15mol/L,添加电解液浓度0.40mol/L,温度保持在5℃左右,无水乙醇添加比例为1:1,从而使铝片的击穿电压从40V上升到130V左右(模板面积1.5cm×4.5cm),采用DimensionEdge型号的原子力显微镜(AFM)对多孔氧化铝模板进行了表征。结果表明:未经退火处理的铝片,也可以制备出高度有序的AAO模板,但其粗糙度略有增加,并与在高压条件下二次氧化、三次氧化、四次氧化制备AAO模板进行了比较,发现二次氧化制备的AAO模板有序度、孔径、孔间距均优于三次、四次氧化法。

For the fast preparation of the highly ordered and aperture - controlled anodic aluminum oxide ( AAO) template for the industrial production, the traditional two - step anodic oxidation method was improved and the AAO templates were prepared through gradually improving hard electrolyte concentration in the hard oxygen oxidation process. The best preparation technology was determined: the initial electrolyte concentration of 0.15 mol/L, and the adding concentration of the electrolyte of 0.40 mol/L, the temperature of about 5℃, the adding ratio of anhydrous ethanol of 1 : 1. In this way, the breakdown voltage of plates increased from around 40 V to 130 V (template size 1.5 cmx4.5 cm). Moreover, the porous alumina template was characterized by atomic force microscope ( AFM, Dimension Edge model). Results showed that the highly ordered AAO templates could be prepared even without annealing treatment of aluminum, but the roughness increased slightly. After the comparison among the AAO templates by two-time oxidation, three-time oxidation and four-time oxidation under the high voltage, the degree of order, aperture and hole spacing of AAO template prepared by two - time oxidation were better than those of AAO templates prepared by three -time oxidatio n and four-time oxidation.