Bulk streaming potential in poly(acrylic acid)/poly(acrylamide) hydrogels
Bulk streaming potential in poly(acrylic acid)/poly(acrylamide) hydrogels
The streaming potential through poly(acrylic acid)-co-acrylamide polymer hydrogel (poly-AA-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 aims 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 charges in the gel, 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 al. [Europhys. Lett. 2000, 50, 513] quantitatively accounts for the observed effects.
properties of polyelectrolyte hydrogels, electric field, electromechanical
5814-5819
Fiumefreddo, Andrea
6d6d6245-1ce3-4a2e-868d-2d9463c857a6
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
14 June 2010
Fiumefreddo, Andrea
6d6d6245-1ce3-4a2e-868d-2d9463c857a6
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Fiumefreddo, Andrea and Utz, Marcel
(2010)
Bulk streaming potential in poly(acrylic acid)/poly(acrylamide) hydrogels.
Macromolecules, 43 (13), Summer Issue, .
(doi:10.1021/ma100565s).
Abstract
The streaming potential through poly(acrylic acid)-co-acrylamide polymer hydrogel (poly-AA-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 aims 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 charges in the gel, 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 al. [Europhys. Lett. 2000, 50, 513] quantitatively accounts for the observed effects.
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Published date: 14 June 2010
Keywords:
properties of polyelectrolyte hydrogels, electric field, electromechanical
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Magnetic Resonance
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Local EPrints ID: 354140
URI: http://eprints.soton.ac.uk/id/eprint/354140
PURE UUID: 88cecf44-f279-4173-b55a-1a94bcb13e0e
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Date deposited: 03 Jul 2013 10:18
Last modified: 15 Mar 2024 03:44
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Author:
Andrea Fiumefreddo
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