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In-situ Investigation of Wetting Patterns in Polymeric Multibore Membranes via Magnetic Resonance Imaging by Denis Wypysek; Anna Maria Kalde; Florian Pradellok; Matthias Wessling is a Engineering article available to read on EtoBox.

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Wetting of the membrane to displace air or conditioning liquids is important to exploit the complex porosity of a filtration membrane. This study reveals the details of wetting in multibore membrane-based filtration modules. Using magnetic resonance imaging (MRI), we quantify the fluid distribution patterns during initial membrane wetting in dead-end permeation mode. The spatio-temporal evolution of aqueous copper sulfate solution wetting the membrane fibers was investigated as a function of the applied flux, packing density, and position along the membrane module length. Three initial wetting conditions were examined: delivery-state membranes, ethanol-washed and dried (airfilled) membranes, and ethanol-filled membranes. Significant changes in wetting patterns were observed due to interfacial and polymer swelling effects. This in-situ investigation reveals a slow wetting progression over six hours and more to obtain complete wetting, even at high fluxes of 200 LMH. However, an increased flux leads to faster wetting kinetics as the evolving wetting patterns are flux dependent. The packing density of the multibore fibers additionally impacts the wetting kinetics by shifting the preva

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Author

Denis Wypysek; Anna Maria Kalde; Florian Pradellok; Matthias Wessling

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)