Journal article
Density and Solubility of Nafion: Recast, Annealed, and Commercial Films
Analytical chemistry (Washington), Vol.68(21), pp.3793-3796
11/01/1996
DOI: 10.1021/ac960604e
PMID: 21619253
Abstract
The density of Nafion membranes wetted in water and acetonitrile and the solubility of Nafion in a 50:50 ethanol/water mixture are reported. Commercially available membranes, solution recast membranes, and recast membranes thermally processed for varying lengths of time were examined. Unheated recast membranes were found to be ∼20% less dense in water than both commercial membranes and recast membranes heated at 140 °C for 40, 50, and 60 min. For heating times of ≥40 min, the density of recast membranes in water was invariant and equal to the density of commercial films. Similarly, in acetonitrile, commercial membranes and films heated for 1 h had the same density; unheated recast films were ∼25% less dense. Nafion density in acetonitrile was ∼15% less than that in water. Acid pretreatment reduced Nafion film density by ∼15%. Unheated recast films were 22-100% soluble in a sonicated ethanol/water mixture. Commercial membranes and recast films heated for as little as 10 min were insoluble under the same conditions.
Details
- Title: Subtitle
- Density and Solubility of Nafion: Recast, Annealed, and Commercial Films
- Creators
- Lois Anne Zook - Department of Chemistry, University of Iowa, Iowa City, Iowa 52242Johna Leddy - Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
- Resource Type
- Journal article
- Publication Details
- Analytical chemistry (Washington), Vol.68(21), pp.3793-3796
- DOI
- 10.1021/ac960604e
- PMID
- 21619253
- ISSN
- 0003-2700
- eISSN
- 1520-6882
- Language
- English
- Date published
- 11/01/1996
- Academic Unit
- Chemistry
- Record Identifier
- 9984216714502771
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