【作者】 陈鹏；

【导师】 李木军；

【作者基本信息】 中国科学技术大学 ， 仪器科学与技术， 2020， 硕士

【摘要】 “沙漠甲虫”能从雾气中集水让自己在干旱地区生存下来,这得益于其背部亲疏水区域相间分布的特点;在自由基光敏树脂的光固化工艺中,氧阻聚效应经常给人们带来烦恼。看似毫无关联的亲疏水图案化表面和氧阻聚效应,本文的研究却将这二者巧妙地联系起来。本文首先研究了在不同强度氧阻聚效应的作用下固化树脂表面的润湿性变化规律及其原因。通过控制曝光时间来实现对氧阻聚效应强度的控制,经测量固化树脂表面的水接触角得到润湿性特征,并且通过AFM和FT-IR等设备对固化树脂表面形貌特征和化学组成进行了充分表征。发现随着氧阻聚效应增强,固化树脂表面因亚微米结构的数量增多而变得更加粗糙,固化树脂表面的疏水性也在增大。因此,通过控制氧阻聚效应强度,就可以实现对固化树脂的表面润湿性的调控。然后基于氧阻聚效应的表面润湿性研究结论,结合DMD连续无掩膜光刻技术,本文提出了一种快速制作亲疏水图案化表面的方法。本方法充分发挥了 DMD连续无掩膜光刻技术灵活快速的加工能力和氧阻聚效应的表面润湿性调控能力,通过实验制备出了多种形状和尺寸的亲疏水微图案化表面并将其成功应用于自组装微液滴阵列。本方法具有工艺流程简单、成本低廉、可以灵活调整表面微图案形状尺寸等优点,不但在表面张力限制的液滴微流控技术领域具有一定的应用价值,而且是一种利用氧阻聚效应的创新性应用。最后,本文还对基于氧阻聚效应制作具有“花瓣效应”的多级结构超疏水表面进行了探究,并且通过实验分析了氧阻聚效应和微柱阵列尺寸对多级结构表面疏水性的影响。更多还原

【Abstract】 A "desert beetle" can collect water from the mist to survive in arid areas,which is due to distribution of hydrophilic-hydrophobic areas on its back.The oxygen inhi-bition often brings troubles to photo-curing process of free radical resins.Seemingly unrelated hydrophilic-hydrophobic patterned surface and oxygen inhibition,our work ingeniously combines the two.First of all,we studied the change tendency and reason of the wettability of the cured resin surface under the different degrees of oxygen inhi-bition.By controlling the exposure time,we realized the control of the strength of the oxygen inhibition.The wettability characteristics are obtained by measuring the water contact angle of the surface.The surface morphology and chemical composition of the cured resin were adequately characterized by AFM,FT-IR and other characterization methods.It is found that with the increase of oxygen inhibition,the surface of the cured resin becomes rougher due to the increased number of submicron structures,and the hydrophobicity of the cured resin surface also increases.Therefore,the surface wet-tability of the cured resin can be controlled by controlling the oxygen inhibition.Then,based on the research conclusion of wettability of oxygen inhibition,combined with the DMD continuous maskless lithography technology,we propose a rapid method to fabricate hydrophilic-hydrophobic patterned surface.This method makes full use of the flexible and rapid processing capability of DMD continuous maskless lithography technology and the ability to adjust the surface wettability of the oxygen inhibition.A va-riety of shapes and sizes of hydrophilic-hydrophobic patterned surfaces were prepared through experiments and successfully applied to self-assembled microdroplet arrays.This method has the advantages of simple process,low cost and flexible adjustment of the shape and size of the surface micropattern.It not only has certain application value in the Surface-Tension-Confined Microfluidics,but also is an innovative application that utilizes the oxygen inhibition effect.In the end,we explored the fabrication of superhy-drophobic hierarchical surfaces with "Petal effect" based on the oxygen inhibition.In addition,the oxygen inhibition and microcolumn array on the surface hydrophobicity of hierarchical surfaces were analyzed through experiments.更多还原