| 摘要 |
<p>The present invention is directed to strong water-permeable thin composite membranes comprised of a microporous polymeric film component and a hydrogel material component. The microporous polymeric film component functions primarily to provide mechanical support to the hydrogel material component. The film component also functions to filter large molecular weight solutes and cells. Preferably, the microporous polymeric film component is in the form of a laminate of two or more layers of microporous polymeric film oriented in different directions. The microporous polymeric film component has void spaces impregnated with the hydrogel material component to form an interpenetrating network therewith. The hydrogel material component provides a means whereby movement of water, aqueous fluids, and aqueous solutes through the composite membrane is controlled. Permeable composite membranes of the present invention have a thickness less than about 100 microns, preferably less than about 50 microns, more preferably less than about 5 microns, and most preferably less than about 1.0 micron.</p> |
