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Title: Dynamic Triple-Mode Sorption and Outgassing in Materials

Abstract

Moisture uptake and outgassing can be detrimental to a system by altering the chemical and mechanical properties of materials within the system over time. In this work, we conducted isotherm experiments to investigate dynamic moisture sorption and desorption in markedly different materials, i.e., a polymeric material, Sylgard-184 and a ceramic aluminosilicate material, Zircar RS-1200, at different temperatures (30 °C–70 °C) by varying the water activity (0.0–0.90). Sylgard-184 showed a linear sorption and outgassing behavior with no-hysteresis over the entire temperature and water activity range considered here. Whereas, the sorption and outgassing of Zircar RS-1200 was highly non-linear with significant hysteresis, especially at higher water activities, at all temperatures considered here. The type of hysteresis suggested the presence of mesopores in Zircar RS-1200, whereas the lack of hysteresis in Sylgard-184 indicates that it has a nonporous structure. A diffusion model coupled with a dynamic, triple-mode sorption (Langmuir, Henry, and pooling modes) model employed in this study matched our experimental data very well and provides mechanistic insight into the processes. Our triple-mode sorption model was adaptive enough to (1) model these distinctly different materials and (2) predict sorption and outgassing under conditions that are distinctly different from the parameterization experiments.

Authors:
 [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1395470
Alternate Identifier(s):
OSTI ID: 1409990
Report Number(s):
LLNL-JRNL-711501
Journal ID: ISSN 2045-2322; PII: 3091
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Chemical engineering; Materials science

Citation Formats

Sharma, Hom N., Harley, Stephen J., Sun, Yunwei, and Glascoe, Elizabeth A. Dynamic Triple-Mode Sorption and Outgassing in Materials. United States: N. p., 2017. Web. doi:10.1038/s41598-017-03091-3.
Sharma, Hom N., Harley, Stephen J., Sun, Yunwei, & Glascoe, Elizabeth A. Dynamic Triple-Mode Sorption and Outgassing in Materials. United States. doi:10.1038/s41598-017-03091-3.
Sharma, Hom N., Harley, Stephen J., Sun, Yunwei, and Glascoe, Elizabeth A. Wed . "Dynamic Triple-Mode Sorption and Outgassing in Materials". United States. doi:10.1038/s41598-017-03091-3. https://www.osti.gov/servlets/purl/1395470.
@article{osti_1395470,
title = {Dynamic Triple-Mode Sorption and Outgassing in Materials},
author = {Sharma, Hom N. and Harley, Stephen J. and Sun, Yunwei and Glascoe, Elizabeth A.},
abstractNote = {Moisture uptake and outgassing can be detrimental to a system by altering the chemical and mechanical properties of materials within the system over time. In this work, we conducted isotherm experiments to investigate dynamic moisture sorption and desorption in markedly different materials, i.e., a polymeric material, Sylgard-184 and a ceramic aluminosilicate material, Zircar RS-1200, at different temperatures (30 °C–70 °C) by varying the water activity (0.0–0.90). Sylgard-184 showed a linear sorption and outgassing behavior with no-hysteresis over the entire temperature and water activity range considered here. Whereas, the sorption and outgassing of Zircar RS-1200 was highly non-linear with significant hysteresis, especially at higher water activities, at all temperatures considered here. The type of hysteresis suggested the presence of mesopores in Zircar RS-1200, whereas the lack of hysteresis in Sylgard-184 indicates that it has a nonporous structure. A diffusion model coupled with a dynamic, triple-mode sorption (Langmuir, Henry, and pooling modes) model employed in this study matched our experimental data very well and provides mechanistic insight into the processes. Our triple-mode sorption model was adaptive enough to (1) model these distinctly different materials and (2) predict sorption and outgassing under conditions that are distinctly different from the parameterization experiments.},
doi = {10.1038/s41598-017-03091-3},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Wed Jun 07 00:00:00 EDT 2017},
month = {Wed Jun 07 00:00:00 EDT 2017}
}

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