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Using Indentation to Quantify Transport Properties of Nanophase-Segregated Polymer Thin Films
Nichole K Nadermann1, Eric M Davis1, Kirt A Page1
1Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA.
Advanced Materials (Deerfield Beach, Fla.)
|July 17, 2015
Abstract:
Indentation of hydrated Nafion thin films reveals that both the in-plane diffusivity of water and the intrinsic permeability of the phase-segregated network decrease dramatically with decreasing film thickness. Using pore-network theory, this decrease in diffusivity is attributed to both an increase in ionic-domain heterogeneity and a reduction in ionic-domain connectivity upon confinement.
