![]() ![]() The viscosity and surface tension of spinning solutions increases with an increase in the concentration of PBI. The solvent mixture ratio and spinning solution properties are not significantly different than the effect of polymer concentration on the viscosity. This study investigated the properties of the polymeric solution and the effects of solvent ratio and concentration on morphology, hydrophobicity and mechanical properties of PBI nanofiber membranes. Abstract: Polybenzimidazole (PBI) nanofiber membranes were prepared using electrospinning potential of 15 kV and 0.2 ml/h flow rate at different PBI concentrations (6.5 and 7.5 w/v%) with the solvent mixture ratio (DMAc:DMF) of 1:1 and 2:1, respectively.
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