Tuning Superhydrophobic Materials with Negative Surface Energy Domains

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhongzhen Wu
  • Shunning Li
  • Shunping Ji
  • Pinghu Chen
  • Suihan Cui
  • Zhengyong Ma
  • Yuchang Weng
  • Qian Huang
  • Zhongcan Wu
  • Yuan Lin
  • Ricky K. Y. Fu
  • Hai Lin
  • Xiubo Tian
  • Feng Pan

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Detail(s)

Original languageEnglish
Article number1391804
Number of pages7
Journal / PublicationResearch
Volume2019
Online published30 Nov 2019
Publication statusPublished - 2019

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Abstract

Hydrophobic/superhydrophobic materials with intrinsic water repellence are highly desirable in engineering fields including anti-icing in aerocrafts, antidrag and anticorrosion in ships, and antifog and self-cleaning in optical lenses, screen, mirrors, and windows. However, superhydrophobic material should have small surface energy (SE) and a micro/nanosurface structure which can reduce solid-liquid contact significantly. The low SE is generally found in organic materials with inferior mechanical properties that is undesirable in engineering. Intriguingly, previous theoretical calculations have predicted a negative SE for θ-alumina (θ-Al2O3), which inspires us to use it as a superhydrophobic material. Here, we report the experimental evidence of the small/negative SE of θ-Al2O3 and a θ-Al2O3-based superhydrophobic coating prepared by one-step scalable plasma arcing oxidation. The superhydrophobic coating has complete ceramic and desired micro/nanostructure and therefore exhibits excellent aging resistance, wear resistance, corrosion resistance, high-temperature tolerance, and burning resistance. Owing to the rarity of the small/negative SE in inorganic materials, the concept to reduce SE by θ-Al2O3 may foster a blowout to develop robust superhydrophobicity by complete inorganic materials.

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Research Unit(s) information for this publication is provided by the author(s) concerned.

Citation Format(s)

Tuning Superhydrophobic Materials with Negative Surface Energy Domains. / Wu, Zhongzhen; Liu, Liangliang; Li, Shunning; Ji, Shunping; Chen, Pinghu; Cui, Suihan; Ma, Zhengyong; Weng, Yuchang; Huang, Qian; Wu, Zhongcan; Wu, Hao; Lin, Yuan; Fu, Ricky K. Y.; Lin, Hai; Tian, Xiubo; Chu, Paul K.; Pan, Feng.

In: Research, Vol. 2019, 1391804, 2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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