H2O Permeability of silica porous liquids
The experiment described in this proposal takes part of a study dedicated to the elaboration of new type of porous liquids and to their application for liquid-liquid extraction. Nowadays, separation of chemical elements is an important stake for many applications. This project proposes therefore to evaluate a new approach by replacing the organic phases of liquid-liquid extraction processes, with a porous liquid. To form such "liquid material" hollow silica nanospheres are made by sol-gel using a surfactant template. They are further grafted: an organosilane grafting followed by an ionic grafting. This ionic bond gives the interesting property to the nanospheres to become liquid. Preliminar extraction tests showed the silica hollow spheres can extract small amount of metallic cations in some pH conditions. For extraction application, it is therefore essential to characterize in details the permeability of these nanoparticules. By matching the contrast between H2O/D2O and silica, SANS will be applied to characterize the nanospheres structure and permeability, and determine if water reaches the inside of the cavity or if it is stuck in the microporosity.
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Dourdain; BEN GHOZI BOUVRANDE Justine; LU Zijun and PREVOST Sylvain. (2020). H2O Permeability of silica porous liquids. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1628
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