Journal article

Cross-linking of dehydrofluorinated PVDF membranes with thiol modified polyhedral oligomeric silsesquioxane (POSS) and pure water flux analysis

Jonathan Sierke, Amanda Ellis

JOURNAL OF MEMBRANE SCIENCE | ELSEVIER SCIENCE BV | Published : 2019

Abstract

Porous poly(vinylidene difluoride) (PVDF) membranes often undergo compaction in pressure driven water treatment, contributing to a reduction in water flux. Here, compaction resistance was tested by cross-linking dehydrofluorinated PVDF (PVDF with alkene functionality) with a synthesized thiol modified polyhedral oligomeric silsesquioxane (thiol POSS) at 0–10 wt% via UV catalyzed thiol-ene addition. Analysis of these microfiltration membranes showed an increase in the Young's modulus from 36.60 ± 1.85 MPa (0 wt% thiol POSS) to 54.60 ± 1.97 MPa (10 wt% thiol POSS), correlating to improved mechanical properties. The pure water flux (PWF) of the membranes was found to increase with 1 wt% thiol P..

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University of Melbourne Researchers