A membrane humidifier assembly includes a first flow field plate adapted to facilitate flow of a first gas thereto and a second flow field plate adapted to facilitate flow of a second gas thereto. A polymeric membrane is disposed between the first and second flow fields and adapted to permit transfer...http://www.google.de/patents/US7972732?utm_source=gb-gplus-sharePatent US7972732 - Perfluorocyclobutane based water vapor transfer membranes with side chain perfluorosulfonic acid moieties
