Journal
MACROMOLECULES
Volume 43, Issue 13, Pages 5814-5819Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma100565s
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Funding
- US National Science Foundation [DMR-0647790, CHE-0809795]
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The streaming potential through poly(acrylic acid)-co-acrylamide polymer hydrogel (poly-wAA-co-AM) membranes has been measured as a function of gel composition and ionic strength of the solvent Polyelectrolyte hydrogels have important potential applications as mechanical transducers The current work arms at providing a quantitative basis to understanding the relationship between gel composition and structure and the electromechanical coupling properties The streaming potential increases in magnitude with the spatial density of negative charms in the eel, up to a saturation point where the density of charges on the polymer backbone becomes comparable to the salt concentration of the equilibrating solution A simple theory of coupled charge and solvent transport based on the model proposed by de Gennes et at [Europhys Lett. 2000..50, 5131 quantitatively accounts for the observed effects
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