Proton conducting polymer membrane comprised of 2-acrylamido-2-methylpropanesulfonic acid / Charles W. Walker, Jr.

Format:

Book

Government document

Author/Creator:

Walker, Charles W, Jr.

Contributor:

U.S. Army Research Laboratory

Series:

ARL-TR (Aberdeen Proving Ground, Md.) ; 2731.

ARL-TR ; 2731

Language:

English

Subjects (All):

Sulfonic acids.

Proton exchange membrane fuel cells.

Sulfonic Acids.

Medical Subjects:

Sulfonic Acids.

Physical Description:

1 online resource (iii, 13 pages) : illustrations.

Place of Publication:

[Adelphi, MD] : Army Research Laboratory, [2002]

Summary:

In order to identify a proton-conducting polymer membrane suitable for replacing Nafion 117 in direct methanol fuel cells, we prepared a cross-linked copolymer of hydrophilic 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 2-hydroxyethyl methacrylate (HEMA). Fumed silicas were also added in an attempt to increase the amount of water adsorbed by the membrane and to enhance water retention. Hydrated copolymer membranes adsorbed significantly more water than Nafion% 117, but were no better at retaining water during drying under ambient conditions. Films composed of 4 percent AMPS-96 percent HEMA had a room temperature proton conductivity of 0.029 S cm-1, which increased to 0.06 S cm-1 at 80 C.

Notes:

Title from PDF title screen (viewed on Feb. 23, 2011).

"May 2002."

Includes bibliographical references (pages 10-11).

OCLC:

74226836

Access Restriction:

Approved for public release.