(366h) The Effect of Pore Penetration on Composite Membranes
In this work, modeling results are compared to experimental data for composite membranes consisting of a dense polydimethylsiloxane (PDMS) layer on a polyetherimide (PEI) ultrafiltration support. Significant discrepancies are observed between the experimental and modeling results. Pore penetration is believed to be a likely reason for the difference between the theoretical and measured permeances. A resistance-in-series model and CFD were employed to calculate the effect of pore penetration on the permeance of composite membranes. Results from these two approaches are in good agreement, and provide a good fit to experimental composite membrane data if pore penetration depth is allowed to vary. An analysis of the PDMS/PEI composite membrane data, suggests that the depth of PDMS penetration into the PEI pores increases as the thickness of the PDMS selective layer increases.