High-performance membranes with full pH-stability

N. Daems (1) , S. Milis (1) , R. Verbeke (1) , Anthony Szymczyk (2) , P.P. Pescarmona (3) , I.F.J. Vankelecom (1)

1 Centre for Surface Chemistry and Catalysis
2 ISCR - Institut des Sciences Chimiques de Rennes
3 University of Groningen [Groningen]

Following current strong demands from, among others, paper, food and mining industries, a novel type of nanofiltration membrane was developed, which displays excellent performance in terms of selectivity/flux with a unique combination of chemical stability over the full (0-14) pH-range and thermal stability up to 120 °C. The membrane consists of polyvinylidene fluoride grafted with polystyrene sulfonic acid. The optimum membrane showed water permeances of 2.4 L h-1 m-2 bar-1 while retaining NaCl, MgSO4 and Rhodamine B (479 Da) for respectively ≈60%, ≈80% and andgt;96%. © 2018 The Royal Society of Chemistry.

Mots clés: Chemical stability; Chlorine compounds; Fluorine compounds; Magnesium compounds; Nanofiltration membranes; pH effects; Sodium chloride; pH range; PH stability; Polystyrene sulfonic acid; Polyvinylidene fluorides; Rhodamine B; Strong demand; Sulfur compounds

Domaines: Chimie

N. Daems, S. Milis, R. Verbeke, Anthony Szymczyk, P.P. Pescarmona, et al.. High-performance membranes with full pH-stability. RSC Advances, 2018, 8 (16), pp.8813-8827. ⟨10.1039/c7ra13663c⟩. ⟨hal-01740155⟩