Performance
A filtration membrane's performance is rated by selectivity, chemical resistance, operational pressure differential and the pure water flow rate per unit area.
Due to the emphasis on flow rate, a membrane is manufactured as thinly as possible. These thin layers introduce defects that may affect selectivity, so system design usually trades off the desired flow rate against both selectivity and operational pressure.
In applications other than filtration, parameters such as mechanical strength, temperature stability, and electrical conductivity may dominate.
Saturation.
Read more about this topic: Thin-film Composite Membrane
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