Does water swell the ordered domains in polyelectrolyte/clay multilayers?

X-ray diffraction has been used to study the sorption of water by multilayer films containing ordered stacks of alternating layers of an organic polyelectrolyte and individual platelets of a smectite. The position and shape of the 001 reflections due to the ordered polyelectrolyte/platelet stacks we...

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Bibliographic Details
Published in:Clays and clay minerals 2007-04, Vol.55 (2), p.160-164
Main Authors: Rouse, Jason H, Ferguson, Gregory S
Format: Article
Language:English
Subjects:
adsorption
alkali metals
cations
clay minerals
crystal structure
domains
Earth sciences
Earth, ocean, space
electrolytes
Exact sciences and technology
expansive materials
humidity
Laponite
layered materials
metals
mineral interlayer
Mineralogy
Montmorillonite
Multilayer
order-disorder
Polyelectrolyte
polyelectrolytes
Polymer-Clay Composite
polymers
rigidity
sheet silicates
Silicates
smectite
sodium
sorption
Stepwise Adsorption
Swelling
water
X-ray diffraction data
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Summary:X-ray diffraction has been used to study the sorption of water by multilayer films containing ordered stacks of alternating layers of an organic polyelectrolyte and individual platelets of a smectite. The position and shape of the 001 reflections due to the ordered polyelectrolyte/platelet stacks were essentially the same when in air at low relative humidity (23-25% RH) and under water. These data indicate that swelling occurs exclusively in X-ray amorphous regions within the film, and that the ordered polyelectrolyte/clay domains themselves are not "swellable" by water.
ISSN:0009-8604
1552-8367
DOI:10.1346/CCMN.2007.0550205