Non-ionic deep eutectic solvents for membrane formation
Résumé
Deep eutectic solvents (DES) have recently emerged as a new class of inexpensive biodegradable solvents and
additives with diverse applications. In this study, a new family of non-ionic deep eutectic solvents (NIDES) is
proposed for the first time for membrane preparation. Three types of NIDES, N-methylacetamide-acetamide
(DES-1), N-methyl acetamide-N-methyl urea (DES-2), and N-methyl acetamide-N,N′ -dimethyl urea (DES-3) were
synthesized and used to dissolve polyvinylidene fluoride (PVDF) polymer. The effects of the additive polyvinylpyrrolidone
(PVP) and the type of NIDES on the PVDF membrane characteristics, water permeability and
bovine serum albumin (BSA) separation were studied. The membranes prepared with DES-1 and 2 wt% PVP
exhibited a good water permeate flux (96.82 L/m2.h) and a high BSA separation factor (96.32%). High performance
PVDF membranes can thus be efficiently prepared using biodegradable inexpensive NIDES.
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