Porous PTFE Article with Hydrophilic Coating

A porous article comprising:

• a porous substrate comprising ePTFE;
• and
• a coating disposed on the porous substrate, the coating comprising poly(vinyl alcohol) and a second polymer grafted on the poly(vinyl alcohol), optionally wherein the second polymer comprises polyethylene glycol (PEG), linear polyethylene imine (PEI), polyallyl alcohol (PAIA), polyacrylic acid (PAA), polyacrylic acid sodium salt (PAANa), poly (2-hydroxyethyl methacrylate) (PHEMA), or any combination thereof.

A porous article comprising:

• a porous substrate comprising ePTFE;
• and
• a coating disposed on the porous substrate, the coating comprising poly(vinyl alcohol) comprising crosslinked allyl groups, propargyl groups, diazirine groups, acrylate functional groups, or a combination of two or more thereof.

A porous article comprising:

• a porous substrate comprising ePTFE;
• and
• a coating disposed on the porous substrate, the coating comprising poly(vinyl alcohol) crosslinked with a crosslinking agent comprising more than two reactive groups per crosslinking agent.