Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/4785

Title: New experimental measurements of solvent induced swelling in nanofiltration membranes
Authors: Tarleton, E.S.
Robinson, J.P.
Smith, S.J.
Na, J.J.W.
Keywords: Membrane swelling
Nanofiltration
PDMS
Organic solvents
Issue Date: 2005
Publisher: © Elsevier
Citation: TARLETON, E.S. ... et al, 2005. New experimental measurements of solvent induced swelling in nanofiltration membranes. Journal of Membrane Science, 261 (1-2), pp.129-135
Abstract: The paper describes developmental apparatus for in-situ determinations of membrane swelling and shows representative examples of the data that can be acquired. The apparatus principally comprises a linear inductive probe and electronic column gauge with an overall resolution of 0.1 μm which was used in two configurations to assess the swelling propensity of polyacrylonitrile (PAN)/polydimethylsiloxane (PDMS) nanofiltration membranes in a range of alkane, aromatic and alcohol solvents. In the absence of an applied pressure on the membrane, experiments showed a maximum expansion for the PDMS layer of 169% using an n-heptane solvent whose solubility parameter (δ) was close to that of PDMS. With more polar solvents falling in the range δ = 23.6-29.2 MPa0.5, swelling of the PDMS was much reduced (<14%) and comparable shrinkage of the PAN support layer was also observed. If a mechanical pressure was applied to the membrane then swelling was reduced. For example with a xylene solvent, over the pressure range 0-10 bar a progressive decline in membrane swelling from 118% to 50% was observed. At 20 bar swelling was further reduced to 33%. When xylene or heptane solvent was mixed with methanol, ethanol or propanol, reduced swelling of the PDMS layer occurred as the concentration of alcohol increased. The extent of swelling was closely related to the value of the mixture solubility parameter (δmixture) where a higher value of δmixture led to less swelling. The results of the swelling experiments are compared to some of the authors previously published results for crossflow nanofiltration and shown to support the salient features.
Description: This article was published in the Journal of Membrane Science [© Elsevier] and the definitive version is available at: www.elsevier.com/locate/memsci
Sponsor: Membrane swelling; Nanofiltration; PDMS; Organic solvents
Version: Accepted for publication
DOI: 10.1016/j.memsci.2005.02.037
URI: https://dspace.lboro.ac.uk/2134/4785
Appears in Collections:Published Articles (Chemical Engineering)

Files associated with this item:

File Description SizeFormat
Membrane swelling JMS 2005 repository.pdf286.38 kBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.