Selective behaviour of hyperfiltration cellulose acetate membranes

Khedr, Maaly; Haleem, S.M. Adb El; Baraka, Ahmad

doi:10.1016/0368-1874(85)85448-4

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…The response of polyelectrolyte hydrogels to environmental influences, such as changes in pH and temperature, has received sustained scientific interest. Deformation of a polyelectrolyte gel subjected to an electric field was first reported by Tanaka et al The electromechanical properties of such gels have since been explored in view of a wide range of applications, − including fuel cells, environmental filtration, and artificial muscles. − Most work has been devoted to actuators, which convert electrical signals into a mechanical response. By contrast, the reverse effect, where the gel is exposed to a mechanical stress which then results in a measurable electrical field, has not been studied as thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Bulk Streaming Potential in Poly(acrylic acid)/Poly(acrylamide) Hydrogels

Fiumefreddo

Utz

2010

Macromolecules

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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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Section: Introductionmentioning

confidence: 99%

Bulk Streaming Potential in Poly(acrylic acid)/Poly(acrylamide) Hydrogels

Fiumefreddo

Utz

2010

Macromolecules

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“…We have also used a potentiometric method (10) to conduct the first studies of cation permselectivity of NIGT.…”

Section: Itroductionmentioning

confidence: 99%

“…Electrochemical methods (7)(8)(9) were used to evaluate cation transport rates in these new NIGT membranes. We have also used a potentiometric method (10) to conduct the first studies of cation permselectivity of NIGT.…”

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confidence: 99%