Theoretically, a layer of nano check valves could be designed on any porous membrane. I don't think anybody has that function figured out yet, much less produced for a commercial use. I'd try searching in advanced materials and membrane research for leads.
You may contact Ed Harris of M&K Chemical Engineering Consultants, Inc. (281) 488-2598. Our Houston office is at 16511 Space Center Blvd. 77058. We specialize in small projects and as you put it "handholding" clients that require specialized assistance. You may also contact Stan...
