Oxygen concentration methods by polymer

[phage]

Most oxygen concentration machine (for medical usage) are using molecular sieves.
It is said polymer can also be employed.
But how?

 

[Latexman]

Membrane separation, sometimes called permeable membrane or semi-permeable membrane separation technology. In membrane gas separation, membranes act as a permeable barrier which different compounds move across at different rates or do not cross at all.

Good Luck,
Latexman