单通氧化铝模板的制备及工艺优化

Preparation of single-pass AAO template and optimization of experimental parameters

利用高纯铝片采用两步阳极氧化法制得排列高度有序、尺寸可控的单通氧化铝(anodic aluminum oxide templates,AAO)模板,且纳米孔呈六方形结构。分别探究了预处理条件、氧化次数、扩孔时间等对AAO模板尺寸及有序性的影响。结果表明,预处理利于纳米管形成高度有序结构,并发现二次阳极氧化法比一次阳极氧化法制备的纳米管排列更有序且孔径均匀;在0~75 min内,管孔径与扩孔时间呈线性关系,酸溶液对孔的腐蚀速率为0.601nm/min,在0~120min内,管长度与二次氧化时间呈线性关系,生长速率为0.28μm/min;最佳电解液浓度确定为0.3mol/L。为后续制备非对称丝岛状骨组织再生高分子薄膜奠定了良好基础。

Single-pass anodic aluminum oxide（AAO）templates were fabricated by a two-step anodization method on high-purity aluminum（Al）plate,which had an amorphous and highly ordered structure composed of hexagon cross-sectional nanotubes.The factors influencing the nanotube size and orderliness of the AAO template were studied and analyzed.The results showed that pretreatments on Al plates made good difference for the obtained nanotubes.It is interesting that compared to one-step anodization,using two-step anodization could get AAO templates with a better ordered and more uniform nanotube array,for which the average pore diameter kept a linear relation to the acidic treatment time in 75 min with a corrosion rate of 0.601 nm/min,and the same to the length of nanotubes reaped in 120 min,together with a nanotube growth rate of 0.28μm/min.Also,the optimal concentration of electrolyte was determined as 0.3 mol/L.The results confirmed that a singlepass AAO template were successfully prepared,which makes the fabrication of polymer membrane with asymmetric and fibre-island structure to guide bone tissue regeneration possible in the following study.