In search of a standard method for the characterisation of organic solvent nanofiltration membranes

Influence of polymer concentration in casting solution and solvent-solute-membrane interactions on performance of polyphenylsulfone (PPSU) nanofiltration membrane in alcohol solvents

“…Compared to the 17 and 21 wt% PPSU membrane, in which the cross sectional structure was dominated by finger-like microvoids, the development of tortuous sponge-like morphology as shown in the 25 wt% PPSU membrane has played a role in increasing solvent transport resistance and reducing methanol productivity. These results are consistent with findings reported elsewhere, in which increasing polymer concentration in the casting solution could result in lower organic solvent flux of the membrane [30,35,36]. With respect to rejection, it is observed that the rejection trend of CR is inversely proportional to solvent permeability, in which the higher the dye rejection is, the lower the methanol permeability is and vice versa.…”

Predictive membrane transport models for Organic Solvent Nanofiltration: How complex do we need to be?

“…3(a)) cover a wide range of MW and are able to give a comprehensive description of the membrane performance in the nanofiltration range. Oligostyrene molecules were used by See-Toh et al [41] and Dutczak et al [42] to characterise PI and PDMS membranes, respectively. The smallest species in the mixture is the α-methyl styrene dimer, which is shown in Fig.…”

Polyaniline hollow fibres for organic solvent nanofiltration

“…The amount of maleic acid added was 50 wt% of the total amount of PANi. 23 A laboratory scale hollow fibre testing module was manufactured using epoxy as the sealant. The hollow fibres were spun using a 2 mm outer diameter (OD) spinneret into a water coagulation bath.…”