Journal
NANOSCALE
Volume 13, Issue 23, Pages 10414-10424Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr01225h
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Funding
- National Key Research and Development Program of China [2017YFB1104700]
- National Science Foundation of China [61805192, 61875158]
- International Joint Research Laboratory for Micro/Nano Manufacturing and Measurement Technologies
- Fundamental Research Funds for the Central Universities
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This paper proposes a method for separating and collecting bubbles in liquids using underwater superaerophobic and superaerophilic porous membranes, effectively solving the problems caused by tiny bubbles in liquids and having potential applications in various fields.
To solve the problems caused by tiny bubbles in liquids and the difficulties involved in collecting useful gas underwater, this paper proposes a method to separate bubbles from water by integrating underwater superaerophobic and superaerophilic porous membranes, including bubble removal and collection methods. Inspired by fish scales and lotus leaves, underwater superaerophobic microstructures and underwater superaerophilic microstructures are prepared on a stainless steel (SS) mesh by femtosecond laser processing, respectively. The as-prepared underwater superaerophobic mesh has an anti-bubble ability, while the underwater superaerophilic mesh has a bubble-absorption ability in water. Based on the different dynamic behavior of bubbles on these two kinds of superwetting meshes, efficient water/bubble separation is achieved by using laser-induced superwetting meshes. Tiny bubbles can be completely removed from the water flow in a pipe or easily collected. Such water/gas separation methods based on underwater superaerophobic and superaerophilic porous membranes provide an effective way to prevent the damage caused by bubbles and to collect the available gas in liquids, which has great potential applications in energy utilization, environmental protection, medical and health care, microfluidic chips, chemical manufacturing, agricultural breeding, and so on.
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