基于飞秒激光微纳技术的多功能铝箔的制备及应用

发布时间：2019-03-03 15:55

【摘要】：飞秒激光作为一种无接触加工手段由于其极短脉冲长度、超高瞬时功率以及与物质相互作用时极小的热影响区等优势,目前已成为一种重要的微纳加工技术。本文使用飞秒激光微纳米加工这一新型加工手段,通过合理的设计加工参数,制备出具有独特表面微纳米结构的微多孔超薄铝箔,并将其成功应用到油水分离和粒子分离等功能中,具有非常高的实际应用前景。全文的主要内容主要包括以下几部分:(1)由于飞秒激光与物质之间的作用机理涉及多种学科,是一个非常复杂的过程,当前理论尚不能非常完备的预测其动态的加工过程,这里我们通过研究飞秒激光与铝箔相互作用机理,通过大量的试验,成功地在超薄铝箔表面制备出具有较好表面质量和一致性的微多孔阵列结构。(2)通过系统地研究前面制备具有不同微孔尺寸和间隔对微多孔超薄铝箔在空气中水和水中油的润湿性地影响,成功的制备出具有空气中超亲水和水中超疏油的微多孔超薄铝箔,并利用这种铝箔对水和油具有不同的润湿性的性质,将其应用到油和水混合物的分离中。同时针对竖直油水分离时只能分离少量的混合物的缺陷,我们设计出两种不同的分离装置,可以实现大流量的油与水混合物的连续的分离和收集。(3)由于制备微多孔铝箔的孔径和间隔是可控的,通过调整飞秒激光加工参数,我们制备出具有特定微孔尺寸的铝箔。由于微流控芯片其微型、高集成性、反应快速、样品消耗少等优点,我们设计并制备了两种不同的微流体芯片,并将该铝箔集成到微流体芯片中实现基于尺寸的粒子分离功能,具有非常高的分离效率。
[Abstract]:Femtosecond laser, as a non-contact machining method, has become an important micro-/ nano-machining technology because of its advantages of very short pulse length, ultra-high instantaneous power and minimal heat-affected zone when interacting with matter. In this paper, micro-porous and ultra-thin aluminum foil with unique surface micro-and nano-structure was prepared by using femtosecond laser micro-nano-machining method through reasonable design of processing parameters. It can be applied to oil-water separation and particle separation successfully, and has a very high practical application prospect. The main contents of this paper include the following parts: (1) because the mechanism between femtosecond laser and matter involves a variety of disciplines, it is a very complex process, and the current theory can not predict the dynamic processing process of femtosecond laser. Here we study the mechanism of the interaction between femtosecond laser and aluminum foil, and through a large number of experiments, Microporous arrays with good surface quality and consistency were successfully fabricated on the surface of ultra-thin aluminum foil. (2) the microporous ultra-thin aluminum foil with different pore sizes and spacing in the air was systematically studied. The wettability of reclaimed water and oil in water, The microporous and ultra-thin aluminum foil with super hydrophilicity in air and ultra-hydrophobic oil in water was successfully prepared and applied to the separation of oil and water mixture by using the aluminum foil with different wettability to water and oil. At the same time, in view of the defect that only a small amount of mixture can be separated in vertical oil-water separation, two different separation devices are designed. The continuous separation and collection of oil-water mixture with large flow rate can be achieved. (3) because the pore diameter and spacing of micro-porous aluminum foil are controllable, by adjusting the processing parameters of femtosecond laser, we have fabricated aluminum foil with specific micro-pore size. Because the microfluidic chip has the advantages of micro, high integration, fast reaction and low sample consumption, two kinds of microfluidic chips are designed and fabricated, and the aluminum foil is integrated into the microfluidic chip to realize the size-based particle separation function. It has very high separation efficiency.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG665;TG146.21

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