Moisture absorption and absorption kinetics in polyelectrolyte films : influence of film thickness

Specular X-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 degrees C. The effect of film thickness on the absorption kinetics and overall absorptio...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 20(2004), 4 vom: 17. Feb., Seite 1453-8
1. Verfasser: Vogt, Bryan D (VerfasserIn)
Weitere Verfasser: Soles, Christopher L, Lee, Hae-Jeong, Lin, Eric K, Wu, Wen-Li
Format: Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a Moisture absorption and absorption kinetics in polyelectrolyte films  |b influence of film thickness 
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520 |a Specular X-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 degrees C. The effect of film thickness on the absorption kinetics and overall absorption was investigated in the range of thickness from (3 to 200) nm. The equilibrium swelling of all the films irrespective of film thickness was (0.57+/-0.03) volume fraction. Although the equilibrium absorption is independent ofthickness, the absorption rate substantially decreases for film thickness < 100 nm. For the thinnest film (3 nm), there is a 5 orders of magnitude decrease in the diffusion coefficient for water 
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700 1 |a Soles, Christopher L  |e verfasserin  |4 aut 
700 1 |a Lee, Hae-Jeong  |e verfasserin  |4 aut 
700 1 |a Lin, Eric K  |e verfasserin  |4 aut 
700 1 |a Wu, Wen-Li  |e verfasserin  |4 aut 
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