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Title: Mechanisms of Vapor Permeation Through Multilayer Barrier Films: Lag Time Versus Equilibrium Permeation

Abstract

Multilayer, thin-film organic/inorganic composite barrier layers have recently been reported to achieve water vapor permeation rates (WVTR) of <10 5 g/m2/day at 25oC/40%RH on polyethylene terephthalate substrates. Using both transient and steady-state vapor permeation measurements combined with classical Fickian diffusion models, we determine the mechanism of vapor permeation through such barrier structures and show that results obtained to date are limited not by equilibrium diffusion but by lag-time effects caused by the extremely long effective path length for the diffusing gas. The implications for further improvement of flexible thin film vapor barriers are discussed.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15020879
Report Number(s):
PNNL-SA-41581
TRN: US200521%%306
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics, 96(4):1840-1849
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MEMBRANES; DIFFUSION; POLYETHYLENES; WATER VAPOR; PERMEABILITY; MEMBRANE TRANSPORT; TIME DEPENDENCE

Citation Formats

Graff, Gordon L, Williford, Rick E, and Burrows, Paul E. Mechanisms of Vapor Permeation Through Multilayer Barrier Films: Lag Time Versus Equilibrium Permeation. United States: N. p., 2004. Web. doi:10.1063/1.1768610.
Graff, Gordon L, Williford, Rick E, & Burrows, Paul E. Mechanisms of Vapor Permeation Through Multilayer Barrier Films: Lag Time Versus Equilibrium Permeation. United States. doi:10.1063/1.1768610.
Graff, Gordon L, Williford, Rick E, and Burrows, Paul E. Sun . "Mechanisms of Vapor Permeation Through Multilayer Barrier Films: Lag Time Versus Equilibrium Permeation". United States. doi:10.1063/1.1768610.
@article{osti_15020879,
title = {Mechanisms of Vapor Permeation Through Multilayer Barrier Films: Lag Time Versus Equilibrium Permeation},
author = {Graff, Gordon L and Williford, Rick E and Burrows, Paul E},
abstractNote = {Multilayer, thin-film organic/inorganic composite barrier layers have recently been reported to achieve water vapor permeation rates (WVTR) of <10 5 g/m2/day at 25oC/40%RH on polyethylene terephthalate substrates. Using both transient and steady-state vapor permeation measurements combined with classical Fickian diffusion models, we determine the mechanism of vapor permeation through such barrier structures and show that results obtained to date are limited not by equilibrium diffusion but by lag-time effects caused by the extremely long effective path length for the diffusing gas. The implications for further improvement of flexible thin film vapor barriers are discussed.},
doi = {10.1063/1.1768610},
journal = {Journal of Applied Physics, 96(4):1840-1849},
number = 4,
volume = 96,
place = {United States},
year = {2004},
month = {8}
}