Sorption of Water and Initial Stages of Swelling of Thin PNIPAM Films Using in Situ GISAXS Microfluidics

The sorption of low-molecular penetrants by thin polymer films, as well as structural changes provoked therein, is of high relevance for many fields of application. Complex permeation, diffusion, swelling, and dissolution processes are often induced within films by solvents or gases. Here, we use a...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 31(2015), 35 vom: 08. Sept., Seite 9619-27
1. Verfasser: Philipp, Martine (VerfasserIn)
Weitere Verfasser: Körstgens, Volker, Magerl, David, Heller, Christoph, Yao, Yuan, Wang, Weijia, Santoro, Gonzalo, Roth, Stephan V, Müller-Buschbaum, Peter
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a The sorption of low-molecular penetrants by thin polymer films, as well as structural changes provoked therein, is of high relevance for many fields of application. Complex permeation, diffusion, swelling, and dissolution processes are often induced within films by solvents or gases. Here, we use a novel in situ microfluidics-grazing incidence small-angle X-ray scattering (GISAXS) setup to examine changes in film thickness and in the surface structure of a thin polymer film that sorbs a good solvent. Thus, this technique is highly complementary to the established techniques on the field of diffusion in polymers. The initial stages of water uptake and swelling are resolved for a 50 nm thin, hydrophilic poly(N-isopropylacrylamide) (PNIPAM) film, before its dissolution sets in. The initial stages of swelling are tentatively described by anomalous swelling induced by a time- and space-dependent diffusion coefficient 
650 4 |a Journal Article 
700 1 |a Körstgens, Volker  |e verfasserin  |4 aut 
700 1 |a Magerl, David  |e verfasserin  |4 aut 
700 1 |a Heller, Christoph  |e verfasserin  |4 aut 
700 1 |a Yao, Yuan  |e verfasserin  |4 aut 
700 1 |a Wang, Weijia  |e verfasserin  |4 aut 
700 1 |a Santoro, Gonzalo  |e verfasserin  |4 aut 
700 1 |a Roth, Stephan V  |e verfasserin  |4 aut 
700 1 |a Müller-Buschbaum, Peter  |e verfasserin  |4 aut 
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