Microfiltration of deformable microgels

Oded Nir, Tony Trieu, Sebastian Bannwarth, Matthias Wessling

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Understanding the separation, concentration and purification processes of soft nanoparticles is essential for numerous applications in water filtration, bioprocessing and blood separation. Here we report unique translocation and rejection features of sub-micron sized microgels during frontal filtration using membranes having micron-sized porosity. Simultaneously measuring the increase in hydraulic resistance and electrical impedance change allows us to clearly distinguish two deposition phases: (a) microgel accumulation within the depth of the membrane porosity and (b) subsequent formation of a thin gel layer on the membrane surface. Such distinction is impossible using only classical hydraulic resistance analysis. The methodology only requires the ratio of microgel to solution conductivity as an input parameter.

Original languageEnglish
Pages (from-to)6512-6517
Number of pages6
JournalSoft Matter
Volume12
Issue number31
DOIs
StatePublished - 1 Jan 2016
Externally publishedYes

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