Product and process fingerprint for nanosecond pulsed laser ablated superhydrophobic surface

Yukui Cai, Xichun Luo, Zhanqiang Liu, Yi Qin, Wenlong Chang, Yanzhou Sun

Research output: Contribution to journalArticle

Abstract

Superhydrophobic surfaces have attracted extensive attention over the last few decades. It is mainly due to their capabilities of providing several interesting functions such as self-cleaning, corrosion resistance, anti-icing and drag reduction. Nanosecond pulsed laser ablation is considered as a promising technique to fabricate superhydrophobic structures. Many research proved that machined surface morphology has a significant effect on the hydrophobicity of specimen. However, few quantitative investigations were conducted to identify effective process parameters and surface characterization parameters for laser-ablated microstructures which are sensitive to the hydrophobicity of microstructured surface. This paper proposed and reveals for the first time, the concepts of process and product fingerprints for laser ablated superhydrophobic surface through experimental investigation and statistical analysis. The results of correlation analysis showed that a newly proposed dimensionless functional parameter in this paper, Rhy i.e. the average ratio of Rz to Rsm is the most sensitive surface characterization parameter to the water contact angle of specimen, which can be regarded as the product fingerprint. It also proposes another new process parameter, average laser pulse energy per unit area of specimen (Is), as the best process fingerprint which can be used to control the product fingerprint Rhy. The threshold value of Rhy and Is are 0.41 and 536 J/mm2 respectively, which help to ensure the superhydrophobicity (contact angle larger than 150°) of specimen in laser ablation process. Therefore, the process and product fingerprints overcome the research challenge of the so-called inverse problem in manufacturing as they can be used to determine the required process parameters and surface topography according to the specification of superhydrophobicity.
LanguageEnglish
JournalMicromachines
Publication statusAccepted/In press - 4 Mar 2019

Fingerprint

Pulsed lasers
Laser ablation
Hydrophobicity
Contact angle
Drag reduction
Lasers
Surface topography
Inverse problems
Surface morphology
Corrosion resistance
Cleaning
Laser pulses
Statistical methods
Specifications
Microstructure
Water

Keywords

  • laser ablation
  • superhydrophobic surface
  • process fingerprint
  • product fingerprint
  • surface morphology

Cite this

@article{405c301073314413be0533c11e4ecb00,
title = "Product and process fingerprint for nanosecond pulsed laser ablated superhydrophobic surface",
abstract = "Superhydrophobic surfaces have attracted extensive attention over the last few decades. It is mainly due to their capabilities of providing several interesting functions such as self-cleaning, corrosion resistance, anti-icing and drag reduction. Nanosecond pulsed laser ablation is considered as a promising technique to fabricate superhydrophobic structures. Many research proved that machined surface morphology has a significant effect on the hydrophobicity of specimen. However, few quantitative investigations were conducted to identify effective process parameters and surface characterization parameters for laser-ablated microstructures which are sensitive to the hydrophobicity of microstructured surface. This paper proposed and reveals for the first time, the concepts of process and product fingerprints for laser ablated superhydrophobic surface through experimental investigation and statistical analysis. The results of correlation analysis showed that a newly proposed dimensionless functional parameter in this paper, Rhy i.e. the average ratio of Rz to Rsm is the most sensitive surface characterization parameter to the water contact angle of specimen, which can be regarded as the product fingerprint. It also proposes another new process parameter, average laser pulse energy per unit area of specimen (Is), as the best process fingerprint which can be used to control the product fingerprint Rhy. The threshold value of Rhy and Is are 0.41 and 536 J/mm2 respectively, which help to ensure the superhydrophobicity (contact angle larger than 150°) of specimen in laser ablation process. Therefore, the process and product fingerprints overcome the research challenge of the so-called inverse problem in manufacturing as they can be used to determine the required process parameters and surface topography according to the specification of superhydrophobicity.",
keywords = "laser ablation, superhydrophobic surface, process fingerprint, product fingerprint, surface morphology",
author = "Yukui Cai and Xichun Luo and Zhanqiang Liu and Yi Qin and Wenlong Chang and Yanzhou Sun",
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Product and process fingerprint for nanosecond pulsed laser ablated superhydrophobic surface. / Cai, Yukui; Luo, Xichun; Liu, Zhanqiang; Qin, Yi; Chang, Wenlong; Sun, Yanzhou.

In: Micromachines, 04.03.2019.

Research output: Contribution to journalArticle

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T1 - Product and process fingerprint for nanosecond pulsed laser ablated superhydrophobic surface

AU - Cai, Yukui

AU - Luo, Xichun

AU - Liu, Zhanqiang

AU - Qin, Yi

AU - Chang, Wenlong

AU - Sun, Yanzhou

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Y1 - 2019/3/4

N2 - Superhydrophobic surfaces have attracted extensive attention over the last few decades. It is mainly due to their capabilities of providing several interesting functions such as self-cleaning, corrosion resistance, anti-icing and drag reduction. Nanosecond pulsed laser ablation is considered as a promising technique to fabricate superhydrophobic structures. Many research proved that machined surface morphology has a significant effect on the hydrophobicity of specimen. However, few quantitative investigations were conducted to identify effective process parameters and surface characterization parameters for laser-ablated microstructures which are sensitive to the hydrophobicity of microstructured surface. This paper proposed and reveals for the first time, the concepts of process and product fingerprints for laser ablated superhydrophobic surface through experimental investigation and statistical analysis. The results of correlation analysis showed that a newly proposed dimensionless functional parameter in this paper, Rhy i.e. the average ratio of Rz to Rsm is the most sensitive surface characterization parameter to the water contact angle of specimen, which can be regarded as the product fingerprint. It also proposes another new process parameter, average laser pulse energy per unit area of specimen (Is), as the best process fingerprint which can be used to control the product fingerprint Rhy. The threshold value of Rhy and Is are 0.41 and 536 J/mm2 respectively, which help to ensure the superhydrophobicity (contact angle larger than 150°) of specimen in laser ablation process. Therefore, the process and product fingerprints overcome the research challenge of the so-called inverse problem in manufacturing as they can be used to determine the required process parameters and surface topography according to the specification of superhydrophobicity.

AB - Superhydrophobic surfaces have attracted extensive attention over the last few decades. It is mainly due to their capabilities of providing several interesting functions such as self-cleaning, corrosion resistance, anti-icing and drag reduction. Nanosecond pulsed laser ablation is considered as a promising technique to fabricate superhydrophobic structures. Many research proved that machined surface morphology has a significant effect on the hydrophobicity of specimen. However, few quantitative investigations were conducted to identify effective process parameters and surface characterization parameters for laser-ablated microstructures which are sensitive to the hydrophobicity of microstructured surface. This paper proposed and reveals for the first time, the concepts of process and product fingerprints for laser ablated superhydrophobic surface through experimental investigation and statistical analysis. The results of correlation analysis showed that a newly proposed dimensionless functional parameter in this paper, Rhy i.e. the average ratio of Rz to Rsm is the most sensitive surface characterization parameter to the water contact angle of specimen, which can be regarded as the product fingerprint. It also proposes another new process parameter, average laser pulse energy per unit area of specimen (Is), as the best process fingerprint which can be used to control the product fingerprint Rhy. The threshold value of Rhy and Is are 0.41 and 536 J/mm2 respectively, which help to ensure the superhydrophobicity (contact angle larger than 150°) of specimen in laser ablation process. Therefore, the process and product fingerprints overcome the research challenge of the so-called inverse problem in manufacturing as they can be used to determine the required process parameters and surface topography according to the specification of superhydrophobicity.

KW - laser ablation

KW - superhydrophobic surface

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