The water permeabilities of two polyamide thin-film composite membranes and polymerdensities of their active layers were measured. The results were analyzed under theframework of the free volume theory. Water permeabilities were measured using a dead end cell, and active layer densities were calculated by measuring the mass per unit area and average polymer thickness of polyamide active layers isolated from their polysulfone and polyester supports. The results are consistent with expectations from free volume theory in which the membrane with the active layer of lower density has the higher water permeability.
This presentation is available to AMTA Members only.
- Lin Lin / Lamar A. Perry / Chengcheng Feng / Orlando Coronell
- University of North Carolina at Chapel Hill
- AWWA/AMTA Membrane Technology Conference, Glendale, AZ
- AWWA/AMTA Membrane Technology Conference
- Permeability, Polymer Density, Active Layers