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• W3217304832 endingPage "111585" @default.
• W3217304832 startingPage "111585" @default.
• W3217304832 abstract "Amine-functionalized porous adsorbent is one kind of important materials in carbon dioxide capture due to its stability and efficiency. In this study, a copolymer (polyHIPE) with interconnected macropore networks, hierarchical porous structure and abundant branched amino groups was prepared by high internal phase emulsion (HIPE) strategy via copolymerization of styrene (St), divinylbenzene (DVB), tetraethyl orthosilicate (TEOS), and triethoxyvinylsilane (VTEO), and then a novel amine-functionalized CO2 adsorbent was synthesized by in situ ring-opening grafting copolymerization of aziridine with the polyHIPE. The structure, morphology, and physicochemical properties of the polyHIPEs were characterized by FTIR, TEM, TGA, and SEM. The key roles of VTEO and TEOS in introducing active hydroxyl groups onto the surface of the inert polymer was evaluated, which was essential to improve the hydrophilicity of the polyHIPE and to provide reactive sites to combine with amine agents. The contact angle of the polyHIPE while copolymerized with TEOS and VTEO significantly was decreased from 144° to 72°. In order to further increase the specific surface area of the polyHIPEs, post crosslinking of polyHIPEs was implemented through a Friedel–Crafts reaction. The specific surface area of post-crosslinked polyHIPE could reach 513 m2/g, which was proven to be effective to enhance its CO2 adsorption capacity. Finally, the abundant branched amino sites via aziridine grafting and high surface area greatly enhanced CO2 adsorption capacity of the amino-modified polyHIPEs. The adsorption capacity of 2.40 and 3.25 mmol CO2/g could be achieved under dry and humid conditions in 0.1 atm partial pressure of CO2, respectively." @default.
• W3217304832 created "2021-12-06" @default.
• W3217304832 creator A5004061368 @default.
• W3217304832 creator A5034366388 @default.
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• W3217304832 date "2022-01-01" @default.
• W3217304832 modified "2023-10-14" @default.
• W3217304832 title "Preparation and structure tuning of CO2 adsorbent based on in-situ amine-functionalized hierarchical porous polymer" @default.
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• W3217304832 doi "https://doi.org/10.1016/j.micromeso.2021.111585" @default.
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