3D-Printed Biomimetic Super-Hydrophobic Structure for Microdroplet Manipulation and Oil/Water Separation
3D-Printed Biomimetic Super-Hydrophobic Structure for Microdroplet Manipulation and Oil/Water Separation
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DOI：
10.1002/adma.201704912
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发表时间：
2018-03-01
影响因子：
29.4
通讯作者：
Chen, Yong
中科院分区：
文献类型：
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作者：
Yang, Yang;Li, Xiangjia;Chen, Yong
仿生功能表面在各种技术应用中越来越受到人们的关注，特别是受植物叶片启发的超疏水表面。然而，传统的制造技术限制了复杂层次微结构的复制。本文采用浸没式表面堆积三维（3D）打印工艺，以槐叶为原型，制备了具有打蛋器头的超疏水性微型人造毛发。将多壁碳纳米管添加到光固化树脂中以提高微结构的表面粗糙度和机械强度。3D打印的打蛋器表面在超疏水性和花瓣效应方面显示出有趣的特性。结果表明，如果表面具有适当的微观结构特征，则亲水性材料可以宏观上表现为疏水性。可控的粘附力（从23 N到55 N）可以很容易地通过不同数量的打蛋器臂进行调整，以用于潜在的应用，例如用于液滴操作的微型手。此外，一个新的能源效率的油/水分离解决方案的基础上，我们的仿生结构被证明。结果表明，3D打印的打蛋器结构可以有许多应用，包括水滴操纵，3D细胞培养，微反应器，溢油清理和油/水分离。
Biomimetic functional surfaces are attracting increasing attention for various technological applications, especially the superhydrophobic surfaces inspired by plant leaves. However, the replication of the complex hierarchical microstructures is limited by the traditional fabrication techniques. In this paper, superhydrophobic micro-scale artificial hairs with eggbeater heads inspired by Salvinia molesta leaf was fabricated by the Immersed surface accumulation three dimensional (3D) printing process. Multi-walled carbon nanotubes were added to the photocurable resins to enhance the surface roughness and mechanical strength of the microstructures. The 3D printed eggbeater surface reveals interesting properties in terms of superhydrophobilicity and petal effect. The results show that a hydrophilic material can macroscopically behave as hydrophobic if a surface has proper microstructured features. The controllable adhesive force (from 23 N to 55 N) can be easily tuned with different number of eggbeater arms for potential applications such as micro hand for droplet manipulation. Furthermore, a new energy-efficient oil/water separation solution based on our biomimetic structures was demonstrated. The results show that the 3D-printed eggbeater structure could have numerous applications, including water droplet manipulation, 3D cell culture, micro reactor, oil spill clean-up, and oil/water separation.