Superhydrophobicity of micro-structured surfaces on zirconia by nanosecond pulsed laser

Research output: Contribution to journalArticle

Abstract

This paper presents a systematic approach to improve the hydrophobicity of microstructured surfaces. It includes a contact angle prediction model for microstructures obtained by nanosecond pulsed laser. Combining with the theoretical constraints for stable Cassie-Baxter state this approach can be used to optimize microstructures dimensions for maximising surface hydrophobicity. Laser machining experiments were conducted to evaluate the prediction model. It shows that the proposed systematic approach can accurately predict the contact angle and obtain microstructures dimensions for maximising surface hydrophobicity. The results also indicate that the contact angle increases with the decrease of pitch of the microstructures. Superhydrophobicity with maximum contact angle of 155.7° is obtained, for the first time, on a micro structured surface (P030) of Zirconia with a pitch of 30 μm machined under a laser power at 8W.
LanguageEnglish
JournalJournal of Micromanufacturing
Publication statusAccepted/In press - 17 Aug 2018

Fingerprint

Pulsed lasers
Zirconia
Contact angle
Hydrophobicity
Microstructure
Lasers
Machining
Experiments

Keywords

  • superhydrophobic surface
  • microstructures
  • zirconia
  • laser surface structuring

Cite this

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title = "Superhydrophobicity of micro-structured surfaces on zirconia by nanosecond pulsed laser",
abstract = "This paper presents a systematic approach to improve the hydrophobicity of microstructured surfaces. It includes a contact angle prediction model for microstructures obtained by nanosecond pulsed laser. Combining with the theoretical constraints for stable Cassie-Baxter state this approach can be used to optimize microstructures dimensions for maximising surface hydrophobicity. Laser machining experiments were conducted to evaluate the prediction model. It shows that the proposed systematic approach can accurately predict the contact angle and obtain microstructures dimensions for maximising surface hydrophobicity. The results also indicate that the contact angle increases with the decrease of pitch of the microstructures. Superhydrophobicity with maximum contact angle of 155.7° is obtained, for the first time, on a micro structured surface (P030) of Zirconia with a pitch of 30 μm machined under a laser power at 8W.",
keywords = "superhydrophobic surface, microstructures, zirconia, laser surface structuring",
author = "Yukui Cai and Wenlong Chang and Xichun Luo and Yi Qin",
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AU - Cai, Yukui

AU - Chang, Wenlong

AU - Luo, Xichun

AU - Qin, Yi

PY - 2018/8/17

Y1 - 2018/8/17

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AB - This paper presents a systematic approach to improve the hydrophobicity of microstructured surfaces. It includes a contact angle prediction model for microstructures obtained by nanosecond pulsed laser. Combining with the theoretical constraints for stable Cassie-Baxter state this approach can be used to optimize microstructures dimensions for maximising surface hydrophobicity. Laser machining experiments were conducted to evaluate the prediction model. It shows that the proposed systematic approach can accurately predict the contact angle and obtain microstructures dimensions for maximising surface hydrophobicity. The results also indicate that the contact angle increases with the decrease of pitch of the microstructures. Superhydrophobicity with maximum contact angle of 155.7° is obtained, for the first time, on a micro structured surface (P030) of Zirconia with a pitch of 30 μm machined under a laser power at 8W.

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