共 19 条
Tuning Superhydrophobic Materials with Negative Surface Energy Domains
被引:26
作者:
Wu, Zhongzhen
[1
]
Liu, Liangliang
[2
]
Li, Shunning
[1
]
Ji, Shunping
[1
]
Chen, Pinghu
[1
]
Cui, Suihan
[1
]
Ma, Zhengyong
[1
]
Weng, Yuchang
[1
]
Huang, Qian
[1
]
Wu, Zhongcan
[1
]
Wu, Hao
[1
]
Lin, Yuan
[1
]
Fu, Ricky K. Y.
[2
]
Lin, Hai
[1
]
Tian, Xiubo
[1
]
Chu, Paul K.
[2
]
Pan, Feng
[1
]
机构:
[1] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China
[2] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
来源:
基金:
国家重点研发计划;
关键词:
MICRO-ARC OXIDATION;
CORROSION;
D O I:
10.34133/2019/1391804
中图分类号:
O [数理科学和化学];
P [天文学、地球科学];
Q [生物科学];
N [自然科学总论];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
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 theta-alumina (theta-Al2O3), which inspires us to use it as a superhydrophobic material. Here, we report the experimental evidence of the small/negative SE of theta-Al2O3 and a theta-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 theta-Al2O3 may foster a blowout to develop robust superhydrophobicity by complete inorganic materials.
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