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Journal ArticleDOI

The morphology in nafion† perfluorinated membrane products, as determined by wide- and small-angle x-ray studies

T. D. Gierke, +2 more
- 01 Nov 1981 - 
- Vol. 19, Iss: 11, pp 1687-1704
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TLDR
In this article, the morphology of the ionomer resin from which Nafion perfluorinated membrane products are made was studied with wide-angle and small-angle x-ray diffraction.
Abstract
The morphology of the ionomer resin from which Nafion perfluorinated membrane products are made was studied with wide-angle and small-angle x-ray diffraction. A reflection observed in the small-angle x-ray scan from hydrolyzed polymer is attributed to ionic clustering. The effects of equiv wt, cation form, temperature, water content, and tensile drawing on this reflection were studied and are discussed.

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Journal ArticleDOI

State of Understanding of Nafion

TL;DR: Light scattering experiments revealed that the radius of gyration had a linear dependence on the molar mass of the aggregates, which suggests that the particles are in the form of rods or ribbons, or at least some elongated structure.
Journal ArticleDOI

Molecular-channel driven actuator with considerations for multiple configurations and color switching.

TL;DR: An ambient-driven actuator that takes advantage of inherent nanoscale molecular channels within a commercial perfluorosulfonic acid ionomer (PFSA) film, fabricated by simple solution processing to realize a rapid response, self-adaptive, and exceptionally stable actuation.
Journal ArticleDOI

Parallel cylindrical water nanochannels in Nafion fuel-cell membranes.

TL;DR: Simulations for various other models of Nafion, including Gierke's cluster and the polymer-bundle model, do not match the scattering data, and a recently introduced algorithm can explain important features of Nafeon, including fast diffusion of water and protons through Nafions and its persistence at low temperatures.
Journal ArticleDOI

New Insights into Perfluorinated Sulfonic-Acid Ionomers

TL;DR: In this comprehensive review, recent progress and developments on perfluorinated sulfonic-acid (PFSA) membranes have been summarized on many key topics, including structure/transport correlations and modeling, composite PFSA membranes, degradation phenomena, and PFSA thin films.
Journal ArticleDOI

Lithium–Sulfur Batteries: Progress and Prospects

TL;DR: This Progress Report highlights recent developments with special attention toward innovation in sulfur-encapsulation techniques, development of novel materials, and cell-component design.
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