Fabrication of mechanically enhanced superhydrophobic surface using nanosecond laser-based high-throughput surface nanostructuring (nHSN)

Qinghua Wang; Avik Samanta; Amanuel Hailu; Scott K Shaw; Hongtao Ding

doi:10.1016/j.procir.2020.02.107

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Fabrication of mechanically enhanced superhydrophobic surface using nanosecond laser-based high-throughput surface nanostructuring (nHSN)

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Fabrication of mechanically enhanced superhydrophobic surface using nanosecond laser-based high-throughput surface nanostructuring (nHSN)

Qinghua Wang, Avik Samanta, Amanuel Hailu, Scott K Shaw and Hongtao Ding

Procedia CIRP, Vol.87, pp.257-262

2020

DOI: 10.1016/j.procir.2020.02.107

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Abstract

In this work, we conduct a systematic experimental investigation of surface integrity for steel and aluminum alloys processed via nanosecond laser-based high-throughput surface nanostructuring (nHSN) process. nHSN surface morphology and surface chemistry are first experimentally characterized, and the results show that surface nanostructure with proper surface chemistry is generated due to the combined effect of chemical etching and attachment of functional groups of low surface energy. Desired surface wetting behavior is achieved using a proper silane reagent during the nHSN chemical immersion treatment phase, while surface nanostructure can be finely modulated by adjusting the laser processing parameters. nHSN nanostructures with fluorosilane chemistry exhibit strong capability to repel water, leading to superhydrophobicity achieved on two important engineering metal alloys, namely steel and aluminium alloys. It is further experimentally demonstrated that the microhardness and anti-corrosion performance of the nHSN surface can be significantly enhanced compared with the untreated surface, indicating that the nHSN process is very effective for enhancing the mechanical strength and corrosion resistance of these important metal alloys. These results show that nHSN simultaneously creates random nanostructures, attains desirable surface chemistry and enhances surface integrity over large-area metal alloy surfaces.

Chemical Modification

Laser Surface Nanostructuring

Mechanically Enhanced

Superhydrophobic

Details

Title: Subtitle: Fabrication of mechanically enhanced superhydrophobic surface using nanosecond laser-based high-throughput surface nanostructuring (nHSN)
Creators: Qinghua Wang - University of Iowa
Avik Samanta - University of Iowa
Amanuel Hailu - University of Iowa
Scott K Shaw - University of Iowa
Hongtao Ding - University of Iowa
Resource Type: Journal article
Publication Details: Procedia CIRP, Vol.87, pp.257-262
DOI: 10.1016/j.procir.2020.02.107
ISSN: 2212-8271
eISSN: 2212-8271
Publisher: Elsevier B.V
Language: English
Date published: 2020
Academic Unit: Iowa Technology Institute; Chemistry; Mechanical Engineering
Record Identifier: 9984196636502771

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