發(fā)布時間：2019-03-03 15:55

【摘要】：飛秒激光作為一種無接觸加工手段由于其極短脈沖長度、超高瞬時功率以及與物質(zhì)相互作用時極小的熱影響區(qū)等優(yōu)勢,目前已成為一種重要的微納加工技術(shù)。本文使用飛秒激光微納米加工這一新型加工手段,通過合理的設(shè)計加工參數(shù),制備出具有獨特表面微納米結(jié)構(gòu)的微多孔超薄鋁箔,并將其成功應(yīng)用到油水分離和粒子分離等功能中,具有非常高的實際應(yīng)用前景。全文的主要內(nèi)容主要包括以下幾部分:(1)由于飛秒激光與物質(zhì)之間的作用機(jī)理涉及多種學(xué)科,是一個非常復(fù)雜的過程,當(dāng)前理論尚不能非常完備的預(yù)測其動態(tài)的加工過程,這里我們通過研究飛秒激光與鋁箔相互作用機(jī)理,通過大量的試驗,成功地在超薄鋁箔表面制備出具有較好表面質(zhì)量和一致性的微多孔陣列結(jié)構(gòu)。(2)通過系統(tǒng)地研究前面制備具有不同微孔尺寸和間隔對微多孔超薄鋁箔在空氣中水和水中油的潤濕性地影響,成功的制備出具有空氣中超親水和水中超疏油的微多孔超薄鋁箔,并利用這種鋁箔對水和油具有不同的潤濕性的性質(zhì),將其應(yīng)用到油和水混合物的分離中。同時針對豎直油水分離時只能分離少量的混合物的缺陷,我們設(shè)計出兩種不同的分離裝置,可以實現(xiàn)大流量的油與水混合物的連續(xù)的分離和收集。(3)由于制備微多孔鋁箔的孔徑和間隔是可控的,通過調(diào)整飛秒激光加工參數(shù),我們制備出具有特定微孔尺寸的鋁箔。由于微流控芯片其微型、高集成性、反應(yīng)快速、樣品消耗少等優(yōu)點,我們設(shè)計并制備了兩種不同的微流體芯片,并將該鋁箔集成到微流體芯片中實現(xiàn)基于尺寸的粒子分離功能,具有非常高的分離效率。
[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.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG665;TG146.21

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