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Fabrication of hierarchical wrinkled morphologies through sequential UVO treatments

机译:通过顺序的UVO处理来制造分层的皱纹形态

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The fabrication, in a controlled manner, of well-defined micrometer size topographical features on polymer surfaces is a great challenge due to the large variety of potential applications of these materials ranging from adhesion, optics to responsive interfaces. A challenging issue concerns the fabrication of interfaces having surface moieties with sizes at different length scales. Herein we describe the fabrication of hierarchical wrinkled surfaces involving two sequential ultraviolet-ozone (UVO) treatments. This methodology allowed us to tailor the shape of PDMS surfaces and create a large variety of different patterns expected to have a broad range of applications requiring surface features with variable sizes. More interestingly, the employment of UVO treatments to produce surfaces with up to three distinct levels of order since they enable the rigidification of the interface by formation of a SiOx layer or the degradation of the PDMS surface when longer treatments. The surfaces prepared by using this approach presented patterns three different scales: the structure provided by the mask employed, the wrinkled surface inside of the directly exposed areas (related to the hole size of the mask) and the wrinkled surface protected during the first treatment by the mask (which is related to the mesh dimensions of the mask employed). (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41863.
机译:在聚合物表面上以可控的方式制造定义良好的微米尺寸的形貌特征是一个巨大的挑战,因为这些材料的潜在应用范围很广,从粘合,光学到响应界面。一个具有挑战性的问题涉及具有不同长度尺度尺寸的表面部分的界面的制造。在这里,我们描述了涉及两个顺序的紫外线臭氧(UVO)处理的分层皱纹表面的制造。这种方法使我们能够定制PDMS表面的形状,并创建各种不同的图案,这些图案有望用于需要可变尺寸表面特征的广泛应用。更有趣的是,采用UVO处理可产生具有多达三个不同顺序的表面,因为它们可以通过形成SiOx层来使界面刚性化,或者在进行更长的处理时可以使PDMS表面降解。使用这种方法制备的表面呈现出三种不同的图案:使用的掩模提供的结构,直接暴露区域内部的皱纹表面(与掩模的孔尺寸有关)以及在第一次处理过程中受到保护的皱纹表面遮罩(与使用的遮罩的网格尺寸有关)。 (c)2015 Wiley Periodicals,Inc. J. Appl。 Polym。科学2015,132,41863。

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