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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year


IMPACT FACTOR increased in 2015: 1.100
5-year IMPACT FACTOR: 1.229
Rank 15 out of 32 in category Nuclear Science & Technology in the 2015 Thomson Reuters Journal Citation Report/Science Edition

SCImago Journal Rank (SJR) 2015: 0.470
Source Normalized Impact per Paper (SNIP) 2015: 0.708
Impact per Publication (IPP) 2015: 1.048

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2193-3405
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Self-assembling properties of malonamide extractants used in separation processes

Fabienne Testard / Pierre Bauduin / L. Martinet / B. Abécassis / L. Berthon / Charles Madic / Th. Zemb
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/ract.2008.1487

A review of the four microstructures present in oil phases of malonamide extractants used for nuclear fuel reprocessing is presented in relation with the extraction properties and the third phase formation. Due to their surface active properties, extractants can be considered as a weak surfactants and are organised into reverse micelles interacting through an attractive potential. The Van der Waals attractions between the cores of reverse micelles are the key parameters for understanding “third phase” formation. Extractant solutions are similar to reverse microemulsions and the stability rules known in the field of microemulsions can be applied. In some cases, micelles are transformed into a regular molecular solution by modest heating. Apart from micellar and regular solutions, two new modes of association of extractant molecules have been identified. Networks of H-bounds are obtained when “modifiers” such as octanol are added by formulators in order to improve stability range. Microphase separation in a more crystalline phase may be obtained by increasing extractant and/or ion concentrations.

Keywords: Reverse micelles; Liquid-liquid extraction; Self-assembling properties; Microstructures; Microemulsions; Malonamide

About the article

Received: 2007-05-21

Accepted: 2007-07-18

Published Online: 2009-09-25

Published in Print: 2008-05-01


Citation Information: Radiochimica Acta, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2008.1487. Export Citation

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