Simultaneous electroosmotic and permeation flows through a Nafion membrane

Barragán, V.M.; Ruı́z-Bauzá, C.; Villaluenga, J.P.G.; Seoane, B.

doi:10.1016/j.jcis.2004.04.066

Cited by 11 publications

(14 citation statements)

References 14 publications

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“…On the other hand, as was shown elsewhere [4], in the absence of an electric voltage difference, a quadratic dependence is observed between the volume flow and the pressure difference and only second-order terms must be considered in the dependence of the volume flow on the pressure gradient. By taking this fact into account in Eqs.…”

Section: Introductionsupporting

confidence: 57%

“…In the absence of a pressure difference, as has been shown elsewhere [4], there is a linear relationship between the flows 0021-9797/$ -see front matter  2005 Elsevier Inc. All rights reserved. doi:10.1016/j.jcis.2005.03.019 through the Nafion membrane and the electric potential difference in the experimental interval studied.…”

Section: Introductionmentioning

confidence: 53%

“…In this previous work [4], it was also observed that, for aqueous solutions, when the flow volume was plotted as a function of the electric current, the slope of the obtained lines did not depend on the pressure difference. The slopes have a similar value than the value obtained in the absence of pressure difference, W , given in Eq.…”

Section: Introductionmentioning

confidence: 61%

“…The thickness, water content, and ion-exchange capacity were reported in a previous paper [4]. The membrane was previously boiled in deionized and bidistilled water for 1 h. The materials used in the experiments were methanol-water solutions of potassium chloride (KCl) of 0.01 N of different volume methanol percentages.…”

Section: Methodsmentioning

confidence: 99%

“…In a previous work [4], the study of the volume flow through a Nafion membrane under the simultaneous action of a pressure difference and an electric potential difference was carried out. In that first part, the study was carried out using aqueous electrolyte solutions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Simultaneous electroosmotic and permeation flows through a Nafion membrane

Barragán

Ruı́z-Bauzá

Villaluenga

et al. 2005

Journal of Colloid and Interface Science

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Section: Introductionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 61%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simultaneous electroosmotic and permeation flows through a Nafion membrane

Barragán

Ruı́z-Bauzá

Villaluenga

et al. 2005

Journal of Colloid and Interface Science

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Evaluation of electroosmotic drag coefficient of water in hydrated sodium perfluorosulfonate electrolyte polymer

Yan

Shao

2008

J Comput Chem

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The electroosmotic drag coefficient of water molecules in hydrated sodium perfluorosulfonate electrolyte polymer is evaluated on the basis of the velocity distribution functions of the sodium cations and water molecules with an electric field applied using molecular dynamics simulations. The simulation results indicate that both velocity distribution functions of water molecules and of sodium cations agree well with the classic Maxwellian velocity distribution functions when there is no electric field applied. If an electric field is applied, the distribution functions of velocity component in directions perpendicular to the applied electric field still agree with the Maxwellian velocity distribution functions but with different temperature parameters. In the direction of the applied electric field, the electric drag causes the velocity distribution function to deviate from the Maxwellian velocity distribution function; however, to obey the peak shifted Maxwellian distribution function. The peak shifting velocities coincide with the average transport velocities induced by the electric field, and could be applied to the evaluation of the electroosmotic drag coefficient of water. By evaluation of the transport velocities of water molecules in the first coordination shells of sodium cations, sulfonate anion groups, and in the bulk, it is clearly shown that the water molecules in the first coordination shell of sodium cations are the major contribution to the electroosmotic drag and momentum transfer from water molecules within the first coordination shell to the other water molecules also contributes to the electroosmotic drag.

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