Publication Type Journal Article
Title Fluorinated surfactants in solution: Diffusion coefficients of fluorinated alcohols in water
Authors Luís Martins Luis A. M. Pereira Goncalo M. C. Silva José do Rosário Ascenso Pedro Morgado Joao P. Prates Ramalho Eduardo J. M. Filipe
Groups MET
Journal FLUID PHASE EQUILIBRIA
Year 2016
Month January
Volume 407
Number 0
Pages 322-333
Abstract Intra-diffusion coefficients of three fluorinated alcohols, 2,2,3,3,3-pentafluoropropan-1-ol (PFP), 2,2,3,3,4,4,4-heptafluorobutan-1-ol (HFB), and 2,2,3,3,4,4,5,5,5-nonafluoropentan-1-ol (NFP) in water have been measured by the PFG-NMR spin-echo technique as a function of temperature and composition, focusing on the alcohol dilute region. For comparison, intra-diffusion coefficients of 2,2,2-trifluoroethanol (TFE) and HFB have also been measured in heavy water using the same method and conditions. As far as we know, these are the first experimental measurements of this property for these binary systems. Intra-diffusion coefficients for NFP in water and for TFE and HFB in heavy water have also been obtained by molecular dynamics simulation, complementing those for TFE, PFP and HFB reported in a previous work. The agreement between experimental and simulated results for PFP, HFB and NFP in water is reasonable, although presenting higher deviations than for the TFE/water system. From the dependence of the intra-diffusion coefficients on temperature, diffusion activation energies were estimated for all the solutes in water and heavy water. (C) 2015 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.fluid.2015.06.006
ISBN
Publisher ELSEVIER SCIENCE BV
Book Title
ISSN 0378-3812
EISSN 1879-0224
Conference Name
Bibtex ID ISI:000364894600031
Observations
Back to Publications List