| Autor: |
Rodgers, Marianne P., Pearman, Benjamin P., Mohajeri, Nahid, Bonville, Leonard J., Slattery, Darlene K., Kunz, Russell, Fenton, James M. |
| Zdroj: |
ECS Transactions; October 2010, Vol. 28 Issue: 27 p61-68, 8p |
| Abstrakt: |
To circumvent conductivity and therefore performance losses due to hot pressing, proton exchange membranes (PEMs) were immersed in high-boiling point solvents prior to hot pressing. It was hypothesized that the presence of the high boiling point solvents during hot pressing would prevent collapse of the hydrophilic domains because, unlike water, they would remain in the membranes even at temperatures above 100 oC. The presence of high-boiling point solvents during hot pressing improved the conductivity of the membranes 20-30%. The water contents of the membranes also increased and the dry densities of the membranes decreased when the high boiling point solvents were used during hot pressing. It is hypothesized that this increase in water content and conductivity and decrease in membrane density is due to the high boiling point solvents preventing the collapse of the hydrophilic pore walls during hot pressing, creating void spaces and therefore allowing more room for water. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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