Polymers for the Semi permeable Membrane Devices

摘要

Semipermeable membranes are a type of biological or synthetic polymer membrane that allows a particular molecule or ion to pass through it by osmosis. Permeability depends on the pressure, concentration, temperature of the molecules or solutes on both sides, and the permeability of the membrane to each solute. Depending on the membrane and solute, permeability may depend on the size, solubility, properties, or chemistry of the solute. The method of designing the membrane for selective permeability determines velocity and permeability. Many natural and synthetic materials that are quite thick are also semitransparent. An example of this is the thin film inside the egg.