铝基微纳结构浸润性表面制备与研究

发布时间：2018-05-01 11:39

本文选题：飞秒激光加工 + 浸润性调控　；参考：《湖北工业大学》2017年硕士论文

【摘要】：本文选取铝为基底,采用阳极氧化技术与飞秒激光加工成功制备出微纳结构浸润性功能表面,通过观察制备表面的微观形貌,测试表面化学成分及润湿性,建立实验参量、微纳米结构与表面成分之间的对应关系,分析表面功能、结构、性质间相互作用机理。相较于学界现今相对复杂难以批量制作的微纳结构浸润性表面,本文研究所采取的技术方法具有较大的应用价值。具体内容如下:(1)通控制实验条件得到微纳结构表面规律变化的样品,以研究阳极氧化对铝基材料表面浸润性能影响与改变机理。通过SEM与EDS对不同表面微观结构特征及化学成分组成进行观察测试,结合接触角相关模型与理论进行分析解释。结果表明,阳极氧化微孔表面改变了材料的表面结构,阳极氧化孔影响了材料与液滴的接触模式。表面凹凸层次结构使样品表面浸润性能发生变化,随着阳极氧化孔径的增长,样品表面浸润性能由亲水向疏水方向变化。(2)通过对飞秒激光加工特性,系统,工艺的研究,利用飞秒激光在铝基表面构造出微纳米结构,分析不同的飞秒激光能量制备的铝基超疏水功能表面特性,并探究了其浸润性能变化的方式与原理。飞秒激光加工后的样品在时效后,铝基材料表面最终稳定的浸润性状态与飞秒激光脉冲能量相关。随着脉冲能量的升高,表面接触角由原始70°转变为150°以上,在变化过程中,对不同能量加工条件下的铝基表面形貌,粗糙度及化学成分组成进行分析研究,结果表明:激光加工后的样品浸润性由亲水状态往疏水状态转变,最终达到超疏水状态。在不同脉冲能量区间均得到超疏水表面,但其表面微观结构存在非周期性或周期性结构的差异,因此疏水性能形成原理有所不同。
[Abstract]:In this paper, anodic oxidation technique and femtosecond laser processing were used to fabricate the micro-nano structure wettable functional surface. The microstructure of the prepared surface was observed, the chemical composition and wettability of the prepared surface were measured, and the experimental parameters were established. The relationship between microstructures and surface composition is analyzed, and the interaction mechanism among surface functions, structures and properties is analyzed. Compared with the infiltrating surface of micro / nano structure which is relatively complex and difficult to be fabricated in the academic field nowadays, the technical method adopted in this paper has great application value. In order to study the effect of anodic oxidation on the surface wettability and the mechanism of the change of the surface wettability of aluminum based materials, the samples with varying surface regularity were obtained under the control of the experimental conditions. The microstructure and chemical composition of different surfaces were observed and tested by SEM and EDS, and the contact angle model and theory were used to analyze and explain them. The results show that the surface structure of the material is changed and the contact mode between the material and the droplet is affected by the anodizing pore. The surface wettability of the sample changed with the increase of anodizing pore size. The surface wettability of the sample changed from hydrophilicity to hydrophobicity through the study of femtosecond laser processing characteristics, system and technology. Using femtosecond laser to construct micro-nano structure on aluminum substrate surface, the surface characteristics of superhydrophobic function of aluminum base prepared by different femtosecond laser energy were analyzed, and the ways and principles of its wettability change were investigated. The final stable wettability of Al based material surface after aging is related to the pulse energy of femtosecond laser. With the increase of pulse energy, the surface contact angle changes from 70 掳to more than 150 掳. In the process of change, the surface morphology, roughness and chemical composition of aluminum matrix under different energy processing conditions are analyzed and studied. The results show that the wettability of the samples after laser processing changes from hydrophilic state to hydrophobic state and finally reaches superhydrophobic state. Superhydrophobic surfaces are obtained in different pulse energy ranges, but the surface microstructure is different in aperiodic or periodic structures, so the formation principle of hydrophobic energy is different.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG174.4

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