Transport of water vapour and gases in modified cellulose acetate matrices. Influence of the nature of the penetrant on diffusion and relaxation kinetics
Identifieur interne : 002391 ( Main/Exploration ); précédent : 002390; suivant : 002392Transport of water vapour and gases in modified cellulose acetate matrices. Influence of the nature of the penetrant on diffusion and relaxation kinetics
Auteurs : Xuan Quang Nguyen [République tchèque] ; Milan Šípek [République tchèque] ; Quang Trong Nguyen [France] ; Vladimir Hynek [République tchèque]Source :
- Macromolecular Chemistry and Physics [ 1022-1352 ] ; 1996-02.
Descripteurs français
- Pascal (Inist)
- Wicri :
English descriptors
- KwdEn :
- Acrylate polymer, Amorphous phase, Amorphous polymer, Amorphous volume fraction, Barrer, Carbon dioxide, Carbon dioxide transport, Cellulose acetate, Cellulose acetate matrices, Cellulose acetate matrix, Coefficient, Consolidation process, Different membranes, Diffusion coefficient, Diffusivity, Dioxide, Experimental data, Experimental study, Fickian, Fickian permeation, Gas permeability, Gaseous diffusion, Glassy polymers, Hynek, Interpenetrating network, Kinetic parameters, Kinetics, Matrix, Membrane, Membrane material, Membrane permeability, Mixture, Molecule scattering, Nguyen, Oxygen, Penetrant, Penetrant diffusion coefficient, Penetrant solubility, Penetrant transport, Permeability, Permeability coefficient, Permeation, Permeation flux, Permeation kinetics, Permeation process, Plasticization, Polym, Polymer, Property composition relationship, Pyridine(4-vinyl) polymer, Relaxation, Relaxation kinetics, Relaxation process, Relaxation processes, Selective permeability, Solubility, Steady state, Steam permeability, Theoretical curve, Vapour, Volume fraction, Water molecules, Water transport, Water vapour, Water vapour permeation.
- Teeft :
- Amorphous phase, Amorphous polymer, Amorphous volume fraction, Barrer, Carbon dioxide, Carbon dioxide transport, Cellulose acetate, Cellulose acetate matrices, Cellulose acetate matrix, Coefficient, Consolidation process, Different membranes, Diffusion coefficient, Diffusivity, Dioxide, Experimental data, Fickian, Fickian permeation, Glassy polymers, Hynek, Kinetic parameters, Kinetics, Matrix, Membrane, Membrane material, Membrane permeability, Nguyen, Penetrant, Penetrant diffusion coefficient, Penetrant solubility, Penetrant transport, Permeability, Permeability coefficient, Permeation, Permeation flux, Permeation kinetics, Permeation process, Plasticization, Polym, Polymer, Relaxation, Relaxation kinetics, Relaxation process, Relaxation processes, Solubility, Steady state, Theoretical curve, Vapour, Volume fraction, Water molecules, Water transport, Water vapour, Water vapour permeation.
Abstract
Membranes developed by modification of a cellulose acetate (CA) matrix were studied by means of the flow method CA matrix is modified by poly(4‐vinylpyridine) (PVP), or an interpenetrating network (IPN) agent. The obtained diffusion coefficients, permeability coefficients and relaxation kinetic parameters for oxygen, carbon dioxide and water vapour enabled us to consider not only the transport properties of the membranes but also the influence of the relaxation processes on the membrane permeability and stability. The results show that the interactions between water molecules and polar groups on the polymer chains cause the membrane material to swell. This swelling process provokes an increase in the permeation flux of ca. 20–30%. Oxygen causes a consolidation of unstable membranes of the cellulose acetate matrix modified by IPN but not of blends with PVP. The consolidation process reduces the membrane permeability by ca. 38%, while carbon dioxide has no effects on the membrane properties. Membranes based on a modified cellulose acetate matrix have higher permeability than pure CA membranes.
Url:
DOI: 10.1002/macp.1996.021970225
Affiliations:
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Le document en format XML
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Physical Chemistry, Prague Institute of Chemical Technology, Technická 5, 16628 Prague, 6</wicri:regionArea><wicri:noRegion>6</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Macromolecular Chemistry and Physics</title><title level="j" type="alt">MACROMOLECULAR CHEMISTRY AND PHYSICS</title><idno type="ISSN">1022-1352</idno><idno type="eISSN">1521-3935</idno><imprint><biblScope unit="vol">197</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="715">715</biblScope><biblScope unit="page" to="727">727</biblScope><biblScope unit="page-count">13</biblScope><publisher>Hüthig & Wepf Verlag</publisher><pubPlace>Zug</pubPlace><date type="published" when="1996-02">1996-02</date></imprint><idno type="ISSN">1022-1352</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1022-1352</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acrylate polymer</term><term>Amorphous phase</term><term>Amorphous polymer</term><term>Amorphous volume fraction</term><term>Barrer</term><term>Carbon dioxide</term><term>Carbon dioxide transport</term><term>Cellulose acetate</term><term>Cellulose acetate matrices</term><term>Cellulose acetate matrix</term><term>Coefficient</term><term>Consolidation process</term><term>Different membranes</term><term>Diffusion coefficient</term><term>Diffusivity</term><term>Dioxide</term><term>Experimental data</term><term>Experimental study</term><term>Fickian</term><term>Fickian permeation</term><term>Gas permeability</term><term>Gaseous diffusion</term><term>Glassy polymers</term><term>Hynek</term><term>Interpenetrating network</term><term>Kinetic parameters</term><term>Kinetics</term><term>Matrix</term><term>Membrane</term><term>Membrane material</term><term>Membrane permeability</term><term>Mixture</term><term>Molecule scattering</term><term>Nguyen</term><term>Oxygen</term><term>Penetrant</term><term>Penetrant diffusion coefficient</term><term>Penetrant solubility</term><term>Penetrant transport</term><term>Permeability</term><term>Permeability coefficient</term><term>Permeation</term><term>Permeation flux</term><term>Permeation kinetics</term><term>Permeation process</term><term>Plasticization</term><term>Polym</term><term>Polymer</term><term>Property composition relationship</term><term>Pyridine(4-vinyl) polymer</term><term>Relaxation</term><term>Relaxation kinetics</term><term>Relaxation process</term><term>Relaxation processes</term><term>Selective permeability</term><term>Solubility</term><term>Steady state</term><term>Steam permeability</term><term>Theoretical curve</term><term>Vapour</term><term>Volume fraction</term><term>Water molecules</term><term>Water transport</term><term>Water vapour</term><term>Water vapour permeation</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Acrylate polymère</term><term>Carbone dioxyde</term><term>Cellulose acétate</term><term>Diffusion gazeuse</term><term>Diffusion molécule</term><term>Etude expérimentale</term><term>Membrane</term><term>Mélange</term><term>Oxygène</term><term>Perméabilité gaz</term><term>Perméabilité sélective</term><term>Perméabilité vapeur eau</term><term>Pyridine(4-vinyl)polymère</term><term>Relation composition propriété</term><term>Réseau polymère interpénétré</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Amorphous phase</term><term>Amorphous polymer</term><term>Amorphous volume fraction</term><term>Barrer</term><term>Carbon dioxide</term><term>Carbon dioxide transport</term><term>Cellulose acetate</term><term>Cellulose acetate matrices</term><term>Cellulose acetate matrix</term><term>Coefficient</term><term>Consolidation process</term><term>Different membranes</term><term>Diffusion coefficient</term><term>Diffusivity</term><term>Dioxide</term><term>Experimental data</term><term>Fickian</term><term>Fickian permeation</term><term>Glassy polymers</term><term>Hynek</term><term>Kinetic parameters</term><term>Kinetics</term><term>Matrix</term><term>Membrane</term><term>Membrane material</term><term>Membrane permeability</term><term>Nguyen</term><term>Penetrant</term><term>Penetrant diffusion coefficient</term><term>Penetrant solubility</term><term>Penetrant transport</term><term>Permeability</term><term>Permeability coefficient</term><term>Permeation</term><term>Permeation flux</term><term>Permeation kinetics</term><term>Permeation process</term><term>Plasticization</term><term>Polym</term><term>Polymer</term><term>Relaxation</term><term>Relaxation kinetics</term><term>Relaxation process</term><term>Relaxation processes</term><term>Solubility</term><term>Steady state</term><term>Theoretical curve</term><term>Vapour</term><term>Volume fraction</term><term>Water molecules</term><term>Water transport</term><term>Water vapour</term><term>Water vapour permeation</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Oxygène</term><term>Polymère</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Membranes developed by modification of a cellulose acetate (CA) matrix were studied by means of the flow method CA matrix is modified by poly(4‐vinylpyridine) (PVP), or an interpenetrating network (IPN) agent. The obtained diffusion coefficients, permeability coefficients and relaxation kinetic parameters for oxygen, carbon dioxide and water vapour enabled us to consider not only the transport properties of the membranes but also the influence of the relaxation processes on the membrane permeability and stability. The results show that the interactions between water molecules and polar groups on the polymer chains cause the membrane material to swell. This swelling process provokes an increase in the permeation flux of ca. 20–30%. Oxygen causes a consolidation of unstable membranes of the cellulose acetate matrix modified by IPN but not of blends with PVP. The consolidation process reduces the membrane permeability by ca. 38%, while carbon dioxide has no effects on the membrane properties. Membranes based on a modified cellulose acetate matrix have higher permeability than pure CA membranes.</div></front></TEI><affiliations><list><country><li>France</li><li>République tchèque</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Nancy</li></settlement></list><tree><country name="République tchèque"><noRegion><name sortKey="Nguyen, Xuan Quang" sort="Nguyen, Xuan Quang" uniqKey="Nguyen X" first="Xuan Quang" last="Nguyen">Xuan Quang Nguyen</name></noRegion><name sortKey="Hynek, Vladimir" sort="Hynek, Vladimir" uniqKey="Hynek V" first="Vladimir" last="Hynek">Vladimir Hynek</name><name sortKey="Sipek, Milan" sort="Sipek, Milan" uniqKey="Sipek M" first="Milan" last="Šípek">Milan Šípek</name><name sortKey="Sipek, Milan" sort="Sipek, Milan" uniqKey="Sipek M" first="Milan" last="Šípek">Milan Šípek</name></country><country name="France"><region name="Grand Est"><name sortKey="Nguyen, Quang Trong" sort="Nguyen, Quang Trong" uniqKey="Nguyen Q" first="Quang Trong" last="Nguyen">Quang Trong Nguyen</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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