TY - JOUR
T1 - Underwater Superaerophobicity/Superaerophilicity and Unidirectional Bubble Passage Based on the Femtosecond Laser-Structured Stainless Steel Mesh
AU - Huo, Jinglan
AU - Yang, Qing
AU - Yong, Jiale
AU - Fan, Peixun
AU - Lu, Yong feng
AU - Hou, Xun
AU - Chen, Feng
N1 - Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/7/1
Y1 - 2020/7/1
N2 - To control the behavior of underwater bubbles, stainless steel meshes are treated through femtosecond laser processing, and the bubble absorption, bubble interception, and unidirectional bubble passage are realized by using structured meshes. The surface of the mesh presents a micro–sub-micro–nano trinary-scale structure (microscale mesh wires, sub-microripples, and nanoparticles) after one-step laser ablation on both sides. The surface shows superhydrophilic in air and superaerophobic once immersed in water. After further modified with fluoroalkylsilane, the wettability of the sample surface is switched to be superaerophilic in water with bubble being absorbed by the sample. When a plenty of underwater bubbles arrive at the structured stainless steel mesh surface, they can be blocked by the underwater superaerophobic mesh but pass through the underwater superaerophilic mesh. In addition, after the mesh being treated only one side and further modified, it is to be Janus mesh and presents asymmetrical wettability of aerophilicity/superaerophilicity. The Janus mesh shows the unidirectional passage of underwater bubbles. Bubbles can only penetrate from aerophilic side to superaerophilic side, but be blocked from the other direction. The mesh is verified to be used to eliminate the stuck bubbles in the container.
AB - To control the behavior of underwater bubbles, stainless steel meshes are treated through femtosecond laser processing, and the bubble absorption, bubble interception, and unidirectional bubble passage are realized by using structured meshes. The surface of the mesh presents a micro–sub-micro–nano trinary-scale structure (microscale mesh wires, sub-microripples, and nanoparticles) after one-step laser ablation on both sides. The surface shows superhydrophilic in air and superaerophobic once immersed in water. After further modified with fluoroalkylsilane, the wettability of the sample surface is switched to be superaerophilic in water with bubble being absorbed by the sample. When a plenty of underwater bubbles arrive at the structured stainless steel mesh surface, they can be blocked by the underwater superaerophobic mesh but pass through the underwater superaerophilic mesh. In addition, after the mesh being treated only one side and further modified, it is to be Janus mesh and presents asymmetrical wettability of aerophilicity/superaerophilicity. The Janus mesh shows the unidirectional passage of underwater bubbles. Bubbles can only penetrate from aerophilic side to superaerophilic side, but be blocked from the other direction. The mesh is verified to be used to eliminate the stuck bubbles in the container.
KW - Janus mesh
KW - bubble passage
KW - femtosecond laser
KW - underwater superaerophilicity
KW - underwater superaerophobicity
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U2 - 10.1002/admi.201902128
DO - 10.1002/admi.201902128
M3 - Article
AN - SCOPUS:85085031855
SN - 2196-7350
VL - 7
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 14
M1 - 1902128
ER -