Shape-Deformed Mushroom-like Reentrant Structures for Robust Liquid-Repellent Surfaces,ACS Applied Materials & Interfaces

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Shape-Deformed Mushroom-like Reentrant Structures for Robust Liquid-Repellent Surfaces
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-01 , DOI: 10.1021/acsami.1c06286
Do Hyeog Kim ₁ , Seok Kim ₂ , Seo Rim Park ₃ , Nicholas X Fang ₂ , Young Tae Cho ₃

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Artificial liquid-repellent surfaces inspired by biomimetic structures provide a wide range of functional surfaces for various practical applications, such as self-cleaning, antisticking, oil/water separation, and droplet manipulation. However, functional biomimetic structures cannot be fabricated using conventional techniques. For example, mushroom-like topologies on the skin of springtails, which are referred to as “doubly reentrant structures,” have attracted significant attention owing to their extraordinary liquid-repellent properties. Current methods of fabricating these reentrant structures have several limitations, such as complex material systems, processing steps, and additional chemical treatments. This study proposed a simple micro-shape-deformed approach to fabricate mushroom-like reentrant structures by digital light processing, a three-dimensional (3D) printing technique, with volumetric shrinkage. The nonuniform cross-linking process and light propagation during photopolymerization caused the deformation of the topological patterns atop the micropillar arrays, resulting in bent structures for mushroom-like shape-deformed microarchitectures. This 3D-printed shape-deformed microstructure exhibits a highly stable liquid repellency without perfluorinated coatings.

中文翻译：

用于坚固防水表面的形状变形蘑菇状折返结构

受仿生结构启发的人造拒液表面为各种实际应用提供了广泛的功能表面，例如自清洁、防粘、油/水分离和液滴处理。然而，功能仿生结构不能使用传统技术制造。例如，跳虫皮肤上的蘑菇状拓扑结构，被称为“双重入结构”，由于其非凡的防水性能而引起了极大的关注。目前制造这些可重入结构的方法有几个限制，例如复杂的材料系统、加工步骤和额外的化学处理。本研究提出了一种简单的微形状变形方法，通过数字光处理制造蘑菇状折返结构，一种三维 (3D) 打印技术，具有体积收缩。光聚合过程中不均匀的交联过程和光传播导致微柱阵列顶部的拓扑图案变形，导致蘑菇状变形微结构的弯曲结构。这种 3D 打印的变形微结构在没有全氟化涂层的情况下表现出高度稳定的拒液性。

更新日期：2021-07-21

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