预处理对PAA膜制备的影响

利用两步阳极氧化法制备多孔氧化铝膜,以膜的孔直径、孔密度和膜厚等作为膜质量指标,探讨预处理膜制备的影响;利用扫描电镜,X—射线衍射观察不同条件下氧化膜的微观结构。结果表明:经过高温退火和电化学抛光等预处理,能够得到质量较高的膜,孔直径为55~60 nm,孔间距为90~95 nm,膜厚度为8.5~9μm,孔密度高达1.28×1010个/cm2。

Influence of Pretreatment on PAA Membrane Preparation

In this paper,PAA membrane is prepared by two-step anodic oxidation method,the influence of pretreatment on membrane preparation is researched based on the quality indicators of film which include hole diameter,hole density and thickness of film.The microstructure of PAA under different conditions is observed by scanning electron microscopy and X-ray diffraction.The results show that： through the pretreatments such as high temperature annealing,electrochemical polishing,and so on,the film with high quality can be got.Their hole diameters are about 55 nm ~ 60 nm,the pore pitches are about 90 nm ~ 95 nm,the membrane thicknesses are about 8.5 μm ~ 9 μm and the pore densities can reach up to 1.28 ×1010/cm2.