Alaei, Zahra, Cattoz, Beatrice, Dowding, Peter John ORCID: https://orcid.org/0000-0001-6219-1672 and Griffiths, Peter ORCID: https://orcid.org/0000-0002-6686-1271 (2022) Solvent relaxation NMR as a tool to study particle dispersions in non-aqueous systems. Physchem, 2 (3). pp. 224-234. ISSN 2673-7167 (Online) (doi:10.3390/physchem2030016)

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Abstract

Determination of the spin-spin NMR relaxation rate of the water in aqueous particulate dispersions has been shown to be a convenient and facile experimental approach to probe the composition of near particle surface structures. Here, a systematic study has been undertaken of both nonaqueous and mixed aqueous-nonaqueous solvent particulate dispersions to explore the universality of the solvent relaxation technique. As in the aqueous case, a linear relationship between the surface area present and the solvent relaxation rate is observed, confirming the rapid exchange of the solvent molecules between the surface and the bulk and thereby illustrating the viability of the experi-mental methodology to study such systems. Crucially, the surface enhancement effect was con-siderably weaker in nonaqueous systems compared with aqueous dispersions and reflects a po-tential limitation of the wider deployment of this experimental methodology

Item Type:	Article
Uncontrolled Keywords:	solvent relaxation, non-aqueous dispersions
Subjects:	Q Science > Q Science (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Materials & Analysis Research Group
Last Modified:	10 Aug 2022 08:47
URI:	http://gala.gre.ac.uk/id/eprint/37121

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