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摘要本文通过阳极氧化法在聚乙二醇和乙二醇电解液中制备多孔阳极氧化钛和多孔阳极氧化铝，主要在恒压和恒流下研究不同比例的聚乙二醇对钛和铝的阳极氧化过程的影响，据此来研究钛和铝的氧化过程和生长机制。 结果表明，在阳极氧化过程中，聚乙二醇和乙二醇的引入对纳米管阵列的主要生长过程无太大影响。在乙二醇中，纳米管阵列可在更高电压下制备；高分子量聚乙二醇的引入，体系表现出高黏度，低电导率，纳米管阵列缓慢有序地生长；相同氧化时间下，随着聚乙二醇添加量增大，纳米管的长度和直径皆不断下降；针对 TiO2在弱碱性和真空下的生长情况，相比于“酸性场致溶解”模型，“氧气气泡模具成孔”模型对纳米管的形成机理有一个更合理的解释。42573
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毕业论文关键词 阳极氧化 聚乙二醇 纳米管阵列 生长机制
Title The research of metal anodizing process in the electrolyte containing PEG and EG
Abstract In this work, porous anodic titanium and porous anodic alumina were prepared by anodic oxidation in the electrolyte containing polyethylene glycol and ethylene glycol, mainly under the condition of constant voltage or constant current, the effects on different proportions of polyethylene glycol on titanium and aluminum anodizing process were researched, and the growth mechanisms of some metal oxides were discussed. The results indicated that whether adding polyethylene glycol or not had little effect on the growth of nanotube arrays in the anodizing process. Nanotube arrays could be prepared at higher voltage in ethylene glycol electrolyte. When added the high molecular weight polyethylene glycol, the system showed the properties of high viscosity and low conductivity. Besides, in this condition, nanotube arrays could be found grow slowly and orderly. The increase in the amount of polyethylene glycol resulted in the decrease of the length and diameter of the nanotubes under the same anodizing time. Compared to the "field-assisted acidic dissolution" model, "oxygen bubble mold for pore forming" model had a better explanation of the formation mechanism of TiO2 nanotubes, which was prepared in the weak base and vacuum conditions.
Keywords anodization polyethylene glycol nanotube arrays growth mechanisms
目次
1引言.1
1.1选题背景和意义.1
1.2多孔阳极氧化物纳米材料的概述..1
1.3多孔阳极氧化物的研究进展2
1.3.1PAA模板的制备方法概述2
1.3.2TiO2纳米管的制备方法概述2
1.3.3阳极氧化法制备多孔阳极氧化物的研究进展.3
1.3.4基于有机溶液中多孔阳极氧化物的研究..4
1.4研究目的及内容.5
2钛的阳极氧化过程的研究.6
2.1实验..6
2.1.1实验原料.6
2.1.2实验设备.6
2.1.3阳极氧化电解液.7
2.1.4阳极氧化工艺7
2.2在含PEG的EG溶液中钛阳极氧化的生长过程的探索8
2.3工艺条件对PATNTs氧化进程的影响.10
2.3.1氧化电压的影响11
2.3.2电解液pH的影响..12
2.3.3气压的影响.13
2.4在含PEG的EG溶液中PATNTs的形成机理..14
2.5本章小结15
3铝的阳极氧化过程的研究16
3.1实验.16
3.1.1实验原料16
3.1.2实验设备16
3.1.3阳极氧化电解液16
3.1.4阳极氧化工艺..16
3.2在含PEG的氟化铵溶液中铝阳极氧化生长过程的研究.17
3.3在含PEG的草酸溶液中铝阳极氧化生长过程的研究18
3.4本章小结19