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首页> 外文期刊>Journal of nano research >Systematic Study on Morphology of Anodic Alumina Produced by Hard Anodization in the Electrolytes Modified with Ethylene Glycol
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Systematic Study on Morphology of Anodic Alumina Produced by Hard Anodization in the Electrolytes Modified with Ethylene Glycol

机译：乙二醇修饰电解质中硬质阳极氧化产生阳极氧化铝形态的系统研究

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摘要

The morphology of anodic aluminum oxide (AAO) produced by hard anodization (HA) in oxalic acid electrolyte modified with various amount of ethylene glycol (EG) was investigated. The EG induces a considerable changes in the AAO morphology. The AAO transforms from continuous nanoporous film to separated AAO nanotubes upon addition of increasing amount of EG. In the sample II (4:1 v/v water to EG mixture) well separated nanotubes with variable wall thickness are produced. In the sample III (1:1 v/v water to EG solution) the nanotubes "imprisoned" in a partially dissolved cell skeleton with regularly spaced apertures along the cell are formed. In the electrolyte with the highest amount of EG (1:4 v/v water to EG mixture) an irregular AAO consisted of formless oxide and the oxide in a form of separated tubes of thick walls and small pores is fabricated. Based on the data obtained in this work it is concluded that the C containing ionic species originating from the EG dissociation along with the high electric field (E) operating during the HA were responsible for the separation phenomena. These ions, driven by the high E, were transported from the electrolyte to the pore base, where they were being embedded into the AAO framework generating strong mechanical stresses at cell boundaries and initiating the cell cleavage process. Moreover, some of these charged particles were ionized under the high E providing additional electrons to the overall current flow and giving rise to a sudden current density boost in the samples II and III.
机译：研究了在用不同量的乙二醇（EG）改性的草酸电解质中，硬阳极氧化（HA）产生的阳极氧化铝（AAO）的形态。 EG引起AAO形态发生相当大的变化。在添加增加量的EG时，AAO从连续的纳米多孔膜转变为分离的AAO纳米管。在样品II中（水与EG的体积比为4：1 v / v），产生了壁距可变且分离良好的纳米管。在样品III中（水与EG溶液的体积比为1：1 v / v），形成了“浸没”在部分溶解的细胞骨架中的纳米管，该纳米管沿着细胞具有规则间隔的孔。在具有最高EG量（1：4 v / v的水与EG混合物）的电解质中，形成了不规则的AAO，该不规则的AAO由无形的氧化物组成，并且氧化物以厚壁和小孔的分离管的形式形成。根据这项工作中获得的数据，可以得出结论认为，源自EG解离的含C离子物种以及在HA期间运行的高电场（E）是造成分离现象的原因。这些由高E驱动的离子从电解质传输到孔基础，然后被嵌入AAO框架中，在细胞边界处产生强大的机械应力并启动细胞裂解过程。此外，这些带电粒子中的一些在高E下被电离，从而为整个电流提供了额外的电子，并在样品II和III中引起突然的电流密度增加。

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