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    Efficient Gas Adsorption Using Superamphiphobic Porous Monoliths as the under-Liquid Gas-Conductive Circuits

    Year: 2019

    Journal: ACS Appl. Mater. Interfaces, Volume 11, JUL 10, page 24795–24801

    Authors: Wen, Min; Peng, Cheng; Yao, Ming; Wang, Chao; Ming, Tingzhen; Peng, Biaoling; Huang, Fuzhi; Zhong, Jie; Cheng, Yi-Bing; Zhang, Qi

    Organizations: National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [51672202, 51702243]; Hubei Provincial Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [2018CFA029, 2016CFB464]; Technological Innovation Key Project of Hubei Province [2016AAA041]; National College Students Innovation and Entrepreneurship Training Program [20181049701028]; Guangxi Natural Science FoundationNational Natural Science Foundation of Guangxi Province [2016GXNSFCB380006, 2017GXNSFFA198015]; "Chutian Scholar Program" of Hubei Province, China

    Keywords: superamphiphobic; porous monolith; gas conductor; gas adsorption; blood oxygenation

    The gas liquid membrane contactor forms a gas solid liquid interface and has a high potential for the applications in gas adsorption, catalysis, energy exchange, and so on. Porous superhydrophobic membranes show a great gas separation/adsorption ability. However, the complicated device architecture and the durability issue are normally concerned especially for the continuous circulation of gas and liquid. In this work, we present a free-standing gas-conductive circuit simply formed by connecting the superamphiphobic porous monoliths (SAPMs) to achieve an efficient under-liquid gas adsorption. The porous worm-like SAPM is prepared with low-temperature expandable graphite and polyvinylidenefluoride, exhibiting superamphiphobicity and superaerophilicity after fluoridation. The as-made SAPM circuits can be used as a reliable gas conductor under numerous liquids, such as water, alkaline, acidic, and oily solutions. In this work, the CO, adsorption capacities of the SAPM circuits are evaluated under NaOH and methyldiethanolamine solutions and the mass transfer rate can reach up to 9.61 mmol m(-2) s(-1). Moreover, the effective human blood oxygenation process is also demonstrated using SAPM circuits. Thus, the reported SAPM provides an alternative gas-liquid exchanging method and the simplified process could be of great benefit to the cost-effectively large-scale CO2 capture or gas exchanging applications.
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