Development and characterization of asymmetric nanofiltration surfactant membranes with different PES concentration
Abstract
In this study a new formulation of dope solution consisting of polyethersulfone, N-methyl-2-pyrrolidone, water and surfactant were formulated from 19 to 27 wt% of PES concentration. The polyvinyl-pyrrolidone additive (PVP K15) and surfactant (Triton X-100) were added into the dope solution as pore former and to improve the membrane porosity, respectively. Moreover, to fabricate the nanofiltration-surfactant (NFS) membrane. From this study, experimental data showed that the membrane prepared from polymer concentration of 20.42 wt% (optimum) exhibited of high water flux ranging from 6.30 x 10-6 m3/m2s to 8.94 x 10-6 m3/m2s, 3.26 x 10-6 m3/m2s of salt permeation and good NaCl rejection of 43.10%.
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