Abstract
An industrially developed non-solvent induced phase separation (NIPS) for porous membranes is still being studied to improve performances and expand application fields. The work introduces a novel strategy to tune the structures of porous membranes via the combination of glass transition temperatures (T g ) and external stimulations . T g was adjusted by the content of residual solvents and additives. Heat and air blowing for higher T g porous membranes than 100 °C were efficient strategies to improve the surface porosity to 65%, the water flux to 600 LMH/bar, and the BSA rejection to 99.8%. Heat and vacuum for lower T g membranes than 100 °C could melt the surface pores and becomes a pier-like structure with the water flux of 2.4 LMH/bar and Na 2 SO 4 rejection of 95.6%. The method could hold great potential for achievable tuning of main characteristic parameters such as structure, performance, porosity, pore size, and molecular weight cut-off.
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