Preparation of polyamide thin film composite forward osmosis membranes using electrospun polyvinylidene fluoride (PVDF) nanofibers as substrates

摘要: Abstracts In this study, we explored the feasibility of using electrospun polyvinylidene fluoride (PVDF) nanofibers as substrates to make high-performance forward osmosis (FO) membrane. Polyamide thin films were successfully formed via interfacial polymerization directly on two PVDF nanofiber substrates, ES-1# and ES-2#, having different surface properties in terms pore size roughness. The structure, water permeability salt rejection resultant film composite (TFC) FO membranes characterized by a series measurements including SEM image observation, XPS characterization inherent separation property tests. Experimental results revealed that denser low permeable polyamide layer was S1# substrate with relatively smaller sizes (mean size: 0.28 ± 0.08 μm; maximum 0.49 ± 0.16 μm), while looser higher attained S2# larger 0.41 ± 0.01 μm; 0.63 ± 0.04 μm). difference structure believed be associated leading cross-linking degrees during polymerization. basic performance resulting TFC investigated flux 30.4 L/m 2  h achieved when active oriented towards 1.0 M NaCl draw solution ratio reverse able kept 0.21 g/L, suggesting good potential electro-spun used for making membranes.