Shuang Ben, Han Ma, Rui Liu, Yuzhen Ning, Zhihong Zhao, Xudong Zhang, Qiang Li, Kesong Liu
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Flexible dual-Janus porous membrane for underwater gas bubbles anti-buoyancy unidirectional transportation
Controllable transportation of bubbles in surfactant or aqueous is very important in daily chemical products, food fermentation, mineral flotation and other fields. However, bubbles are mainly dominated by buoyancy and move upward in solution, which makes the manipulation of bubbles difficult. Although some progress has been made in controlling underwater bubbles, achieving continuous transportation and collection of underwater bubbles without relying on external forces is still a great challenge. To this end, we bionically designed a flexible polydimethylsiloxane (PDMS) porous surface with dual-Janus characteristics. Namely, a porous PDMS membrane integrating structural gradient and wettability gradient realizes the underwater anti-buoyancy unidirectional transportation of bubbles without external force input, and possesses the capability of underwater gas anti-buoyancy transportation and storage. This work provides inspiration and direction for the development and design of underwater gas transportation and storage devices and provides innovative thinking for the implementation of seabed carbon dioxide storage technology.
期刊介绍：
Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field.
Categories of articles include:
Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry.
Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies.
Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.
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