Skip to Content
Find More Like This
Return to Search

Grafted functional groups on expanded tetrafluoroethylene (ePTFE) support for fuel cell and water transport membranes

United States Patent

January 24, 2017
View the Complete Patent at the US Patent & Trademark Office
A method for forming a modified solid polymer includes a step of contacting a solid fluorinated polymer with a sodium sodium-naphthalenide solution to form a treated fluorinated solid polymer. The treated fluorinated solid polymer is contacted with carbon dioxide, sulfur dioxide, or sulfur trioxide to form a solid grafted fluorinated polymer. Characteristically, the grafted fluorinated polymer includes appended CO.sub.2H or SO.sub.2H or SO.sub.3H groups. The solid grafted fluorinated polymer is advantageously incorporated into a fuel cell as part of the ion-conducting membrane or a water transport membrane in a humidifier.
Fuller; Timothy J. (Pittsford, NY), Jiang; Ruichun (Rochester, NY)
14/ 586,132
December 30, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The invention was made with Government support under Agreement No. DE-EE0000470 awarded by the Department of Energy--Water Transport. The Government has certain rights to the invention.