Fabrication of Bioinspired Micro/nano-textured Surfaces Through Scalable Roll Coating Manufacturing

IF 1 Q4 ENGINEERING, MANUFACTURING

Journal of Micro and Nano-Manufacturing Pub Date : 2023-01-23 DOI:10.1115/1.4056732

B. Black, S. Chockalingam, Md. Didarul Islam, Sipan Liu, Himendra Perera, Saad A Khan, J. Ryu

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Abstract

Bioinspired, micro/nano-textured surfaces have a variety of applications including superhydrophobicity, self-cleaning, anti-icing, anti-biofouling, and drag reduction. In this paper, a template-free and scalable roll coating process is studied for fabrication of micro/nano-scale topographies surfaces. These micro/nano-scale structures are generated with viscoelastic polymer nanocomposites and derived by controlling ribbing instabilities in forward roll coating. The relationship between process conditions and surface topography is studied in terms of shear rate, capillary number, and surface roughness parameters (e.g., Wenzel factor and the density of peaks). For a given shear rate, the sample roughness increased with a higher capillary number until a threshold point. Similarly, for a given capillary number, the roughness increased up to a threshold range associated with shear rate. The optimum range of the shear rate and the capillary number was found to be 40-60 s-1 and 4.5×105- 6×105, respectively. This resulted in a maximum Wenzel roughness factor of 1.91, a peak density of 3.94×104 (1/mm2), and a water contact angle (WCA)of 128°.

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利用可伸缩滚涂工艺制备仿生微/纳米纹理表面

仿生、微/纳米纹理表面具有多种应用，包括超疏水性、自清洁、防冰、防生物污染和减阻。本文研究了一种无模板、可扩展的滚涂工艺，用于制备微纳米尺度的形貌表面。这些微纳米级结构是由粘弹性聚合物纳米复合材料生成的，并通过控制前滚涂层中的罗纹不稳定性而得到的。从剪切速率、毛细数和表面粗糙度参数(如Wenzel因子和峰密度)等方面研究了工艺条件与表面形貌的关系。在剪切速率一定的情况下，试样粗糙度随毛细数的增加而增加，直至一个阈值点。同样，对于给定的毛细管数，粗糙度增加到与剪切速率相关的阈值范围。剪切速率和毛细管数的最佳范围分别为40 ~ 60 s-1和4.5×105 ~ 6×105。这导致最大Wenzel粗糙度因子为1.91，峰值密度为3.94×104 (1/mm2)，水接触角(WCA)为128°。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Micro and Nano-Manufacturing ENGINEERING, MANUFACTURING-

CiteScore

2.70

自引率

0.00%

发文量

期刊介绍： The Journal of Micro and Nano-Manufacturing provides a forum for the rapid dissemination of original theoretical and applied research in the areas of micro- and nano-manufacturing that are related to process innovation, accuracy, and precision, throughput enhancement, material utilization, compact equipment development, environmental and life-cycle analysis, and predictive modeling of manufacturing processes with feature sizes less than one hundred micrometers. Papers addressing special needs in emerging areas, such as biomedical devices, drug manufacturing, water and energy, are also encouraged. Areas of interest including, but not limited to: Unit micro- and nano-manufacturing processes; Hybrid manufacturing processes combining bottom-up and top-down processes; Hybrid manufacturing processes utilizing various energy sources (optical, mechanical, electrical, solar, etc.) to achieve multi-scale features and resolution; High-throughput micro- and nano-manufacturing processes; Equipment development; Predictive modeling and simulation of materials and/or systems enabling point-of-need or scaled-up micro- and nano-manufacturing; Metrology at the micro- and nano-scales over large areas; Sensors and sensor integration; Design algorithms for multi-scale manufacturing; Life cycle analysis; Logistics and material handling related to micro- and nano-manufacturing.