Diffusion of water through various polymer films: a new high performance method of characterization

Métayer, M. Le; Labbé, M.; Marais, Stéphane; Langévin, D.; Chappey, Corinne; Dreux, F.; Brainville, M.; Belliard, P.

doi:10.1016/s0142-9418(98)00052-x

Cited by 74 publications

(49 citation statements)

References 5 publications

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“…The mean values were calculated from at least four measurements per sample. The water permeation measurements briefly reported were carried out by using a pervaporation method with an apparatus developed in our laboratory [26]. This differential permeation is based on the measurement of the water permeation flux through a film as a function of time.…”

Section: Water Permeation Experimentsmentioning

confidence: 99%

“…where A ¼3.5 cm 2 is the film surface area, f¼1.1 cm 3 s À 1 the flow rate of the carrier gas sweeping the downstream face, T the temperature (298 K), and (x out -x in ) is the water concentration, expressed in ppmV, determined at outlet and inlet of the permeation cell [26]. The permeability coefficient P, expressed in barrer units (1 barrer¼10 À 10 cm 3 (STP)cm Â cm À 2 s À 1 cmHg À 1 ), was calculated from the steady state flux by…”

Section: Water Permeation Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Water transport properties of bio-nanocomposites reinforced by Luffa cylindrica cellulose nanocrystals

Follain

Belbekhouche

Bras

et al. 2013

Journal of Membrane Science

124

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Section: Water Permeation Experimentsmentioning

confidence: 99%

Section: Water Permeation Experimentsmentioning

confidence: 99%

Water transport properties of bio-nanocomposites reinforced by Luffa cylindrica cellulose nanocrystals

Follain

Belbekhouche

Bras

et al. 2013

Journal of Membrane Science

124

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“…In a previous article, 4 we described the method and the highly sensitive permeameter that make it possible to measure low water permeation fluxes for the study of diffusion and permeation phenomena. In this article, we report our experimental results for the diffusion and permeation properties of water through different polymer films.…”

Section: Introductionmentioning

confidence: 99%

Permeation of water through polar and nonpolar polymers and copolymers: Determination of the concentration-dependent diffusion coefficient

Marais

Nguyen

Devallencourt

et al. 2000

J. Polym. Sci. B Polym. Phys.

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“…For water (H 2 O) and oxygen (O 2 ), the measurement principle and procedure were described in previous papers [6,7] . When the upstream face of an initially dry film is suddenly brought into contact with an atmosphere at fixed water or oxygen concentration, while the downstream face is swept with a dry gas at a flow rate (f), a permeation flux J occurs through the film.…”

Section: Permeationmentioning

confidence: 99%

“…Now, on the basis of a mean diffusion coefficient D , the solubility coefficient S can be deduced from the general relation [13] S D P ⋅ = (10.) 6 Finally, the fundamental parameters characterizing membrane separation performance are the permeability coefficient, P, and the ideal selectivity, α A/B . Ideal gas selectivity is the ratio of permeability coefficients of two gases [14] :…”

Section: For Water (H 2 O) and Oxygen (O 2 )mentioning

confidence: 99%

Transport of water and gases through EVA/PVC blend films—permeation and DSC investigations

et al. 2004

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The transport of water vapor and gases (oxygen and carbon dioxide) through poly(ethylene-co-vinyl acetate) (EVA) films of different VA content, poly(vinylchloride) (PVC) and EVA/PVC blend films, was analysed from permeation measurements.A plasticization effect of water on the material was observed for EVA films with more than 19% wt. of VA content and for the EVA/PVC blends, while for gas permeation practically all the experimental curves are characterized by a constant diffusion coefficient, whatever the VA content of the copolymer used. The increase in water absorption with the VA content leads to a steady increase in the water permeability of the EVA copolymers. By mixing the glassy PVC polymer with the EVA copolymer (in a rubbery state) reduced water and gas permeability is observed, resulting mainly from the decrease of the diffusivity due to the low segment mobility of the dense PVC material able to create hydrogen bonds between the hydrogen atoms and the Cl-substituted carbon of PVC with VA carbonyls. Compared to EVA copolymers, the EVA/PVC blends with equivalent VA contents are better in terms of selectivity.Keywords : EVA copolymers, EVA/PVC blends, water and gases permeation, DSC. * Corresponding author, stephane.marais@univ-rouen.fr 2 1-IntroductionFresh fruit and vegetables, which are living matter, sometimes need to be shipped and stored until their consumption. In order to extend their life time, it is necessary to reduce the rates of biochemical reactions which consume oxygen and produce carbon dioxide, ethylene and water [1]. There is an opposite relationship between the respiratory intensity and the storage time of the fruit and vegetables. Anaerobic fermentation of bio-components under high water and CO 2 contents often leads to bad taste and smell of fruit and vegetables. A better preservation of this type of food can thus be obtained by decreasing the respiratory intensity and the anaerobic fermentation rate via control of oxygen, carbon dioxyde and water vapor permeabilities. This can be obtained with packaging materials exhibiting high H 2 O/CO 2 and CO 2 /O 2 selectivities.To obtain a more favorable atmosphere for the preservation of some foodstuffs, micro perforation of hydrophobic films like bioriented polypropylene is currently used. The permeability of all gases is enhanced due to the additional convection flow through the created holes. As the bulk flow through holes is much faster than that through the dense polymer, but is non-selective [1], such films are only suitable for certain foodstuffs like cheese, where water vapor and CO 2 buildup must be avoided.In the present work, we investigate the use of copolymers and blends as selective packaging materials. Changes in copolymer or blend composition make it possible to vary the film permeability and selectivity properties. As ethylene-vinyl acetate (EVA) copolymers with vinyl acetate content varying from 2% to 70%. are commercially available, they are worth being studied as packaging materials.In previous papers, the transport...

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Diffusion of water through various polymer films: a new high performance method of characterization

Cited by 74 publications

References 5 publications

Water transport properties of bio-nanocomposites reinforced by Luffa cylindrica cellulose nanocrystals

Water transport properties of bio-nanocomposites reinforced by Luffa cylindrica cellulose nanocrystals

Permeation of water through polar and nonpolar polymers and copolymers: Determination of the concentration-dependent diffusion coefficient

Transport of water and gases through EVA/PVC blend films—permeation and DSC investigations

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