Song, J; Liu, Z; Wang, X; Liu, H; Lu, Y; Deng, X; Carmalt, CJ; Song, J; Liu, Z; Wang, X; Liu, H; Lu, Y; Deng, X; Carmalt, CJ; Parkin, IP; - view fewer (2019) High-Efficiency Bubbles Transportation in Aqueous Environment on Serial-Wedge-Shaped Wettability Pattern. Journal of Materials Chemistry A , 13 (1) pp. 728-736. 10.1039/C9TA02095K.

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Abstract

Spontaneous and directional pumpless transportation (SDPT) of subaqueous gas bubbles has great prospects in eliminating the destructive gas bubbles in fluid transportation pipes. However, with current technology it is difficult to realize the non-buoyancy driven long-distance SDPT. How to realize the long-distance SDPT of subaqueous gas bubbles and how to fabricate the surface with the capacity of long-distance SDPT of subaqueous gas bubbles on engineering metal materials still remains a challenge. Here, a serial-wedge-shaped wettability pattern with the exterior surrounding subaqueous superaerophobic region and inside interior subaqueous superaerophilic region is designed to realize the long-distance SDPT of subaqueous gas bubbles. The process is driven by unbalanced surface tension forces, hence, subaqueous gas bubbles not only can be transported on the horizontal and straight pattern, but can also be easily transported on the horizontal and spiral-shaped pattern or on a wave-shaped pattern that is spatially tilted. In addition, a universal method composed of electrochemical etching and laser etching is also proposed to fabricate the serial-wedge-shaped wettability pattern on various engineering metal materials including Al, Mg alloy, Ti alloy, and Zn.

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