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题名: Superhydrophobic Cones for Continuous Collection and Directional Transportation of CO2 Microbubbles in CO2 Supersaturated Solutions
作者: Xue, Xiuzhan1; Yu, Cunming3; Wang, Jingming1; Jiang, Lei1, 2
关键词: superhydrophobic cone ; microbubble ; continuous collection ; directional transportation ; gradient of Laplace pressure
刊名: ACS NANO
发表日期: 2016-12-01
卷: 10, 期:12, 页:10887-10893
收录类别: SCI
英文摘要: Microbubbles are tiny bubbles with diameters below 50 mu m. Because of their minute buoyant force, the microbubbles stagnate in aqueous media for a long time, and they sometimes cause serious damage. Most traditional methods chosen for elimination of gas bubbles utilize buoyancy forces including chemical methods and physical methods, and they only have a minor effect on microbubbles. Several approaches have been developed to collect and transport microbubbles in aqueous media. However, the realization of innovative strategies to directly collect and transport microbubbles in aqueous media remains a big challenge. In nature, both spider silk and cactus spines take advantage of their conical-shaped surface to yield the gradient of Laplace pressure and surface free energy for collecting fog droplets from the environment. Inspired by this, we introduce here the gradient of Laplace pressure and surface free energy to the interface of superhydrophobic copper cones (SCCs), which can continuously collect and directionally transport CO2 microbubbles (from tip side to base side) in CO2-supersaturated solution. A gas layer was formed when the microbubbles encounter the SCCs. This offers a channel for microbubble directional transportation. The efficiency of microbubble transport is significantly affected by the apex angle of SCCs and the carbon dioxide concentration. The former provides different gradients of Laplace pressure as the driving force. The latter represents the capacity, which offers the quantity of CO2 microbubbles for collection and transportation. We believe that this approach provides a simple and valid way to remove microbubbles.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36324
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Beihang Univ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Minist Educ, Sch Chem & Environm, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Lab Bioinspired Smart Interface Sci, Key Lab Bioinspired Mat & Interfacial Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
3.Chinese Acad Sci, BNLMS, Key Lab Green Printing, Inst Chem, Beijing 100190, Peoples R China
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