| abstract |
Disclosed is an asymmetric film comprising: a first asymmetric porous section comprising a first porous asymmetry that is increased from a first outer surface via a first porous section of the body, and comprising a second outer surface a second asymmetrically asymmetric second asymmetric porous section that is enlarged via a second porous section of the body, wherein the first average pore size is greater than the second average pore size; and a method of making and using the films. |