Development of a polyvinylidene difluoride membrane for nanofiltration

© 2018 Elsevier B.V. Integrally skinned asymmetric nanofiltration (NF) membranes are widely used for treating a variety of aqueous and solvent streams. Polyvinylidene difluoride (PVDF), is an excellent film forming polymer with outstanding chemical, thermal and mechanical stability. However, additive-free PVDF membranes with pores small enough to apply them in NF do not currently exist. By accurately tuning the phase inversion parameters (i.e. polymer concentration, co-solvent concentration and evaporation time), a membrane was obtained that retains for 80% a 327 Da solute from an aqueous solution at a permeance of 1.8 LMH/bar when operated at 10 bar. The membranes were characterised by XRD and SEM, while the membrane formation process was characterised using viscosity measurements and cloud point determinations.

Jaar van publicatie:2018

BOF-keylabel:ja

IOF-keylabel:ja

BOF-publication weight:10

CSS-citation score:2

Authors from:Higher Education

Toegankelijkheid:Open