Hydrophobic Porous Liquids with Controlled Cavity Size and Physico‐Chemical Properties

Abstract: Developing greener hydrometallurgical processes implies offering alternatives to conventional solvents used for liquid‐liquid extraction (LLE) of metals. In this context, it is proposed to substitute the organic phase by a hydrophobic silica‐based porous liquid (PL). Two different sulfonated hollow silica particles (HSPs) are modified with various polyethoxylated fatty amines (EthAs) forming a canopy that provides both the targeted hydrophobicity and liquefying properties. This study shows that these properties can be tuned by varying the number of ethylene oxide units in the EthA: middle‐range molecular weight EthAs allow obtaining a liquid at room temperature, while too short or too long EthA leads to solid particles. Viscosity is also impacted by the density and size of the silica spheres: less viscous PLs are obtained with small low‐density spheres, while for larger spheres (c.a. 200 nm) the density has a less significant impact on viscosity. According to this approach, hydrophobic PLs are successfully synthesized. When contacted with an aqueous phase, the most hydrophobic PLs obtained allow a subsequent phase separation. Preliminary extraction tests on three rare earth elements have further shown that functionalization of the PL is necessary to observe metal extraction.

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• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Hydrophobic Porous Liquids with Controlled Cavity Size and Physico‐Chemical Properties ; day:30 ; month:11 ; year:2023 ; extent:11 ; Advanced science ; (30.11.2023) (gesamt 11)

Contributors, Places and Time

• Creator: Ginot, Lorianne ; El Bakkouche, Amal ; Giusti, Fabrice ; Dourdain, Sandrine ; Pellet‐Rostaing, Stéphane

Further information

• DOI: 10.1002/advs.202305906
• URN: urn:nbn:de:101:1-2023120115250343483806
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.