Manometric techniques for determination of gas transport parameters in membranes. Application to the study of dense and asymmetric poly(vinyltrimethylsilane) membranes

Nguyen, Xuan Quang; Brož, Zdeněk; Vašák, František; Nguyen, Quang Trong

doi:10.1016/0376-7388(94)00019-0

Cited by 20 publications

(11 citation statements)

References 7 publications

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“…The technique is analogous to the so-called manometric method. 44,45 The Anodisc was mounted on strips of impermeable tape such that a well-known area in the center of the Anodisc served as a permeable area. Portions outside of this area were coated with Vac-Seal sealant and baked overnight at 60°C to prevent gas from diffusing between the tape/Anodisc boundary.…”

Section: Methodsmentioning

confidence: 99%

Modeling gas flow through microchannels and nanopores

Roy

Raju

Chuang

et al. 2003

Journal of Applied Physics

565

329

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Microchannel based systems have emerged as a critical design trend in development of precise control and maneuvering of small devices. In microelectronics, space propulsion and biomedical areas, these systems are especially useful. Nanoscale pores are recently becoming of great interest due to their beneficial drag and heat transfer properties. However it is difficult to predict the flow performance of these microsystems and nanosystems numerically since the standard assumptions of using Navier-Stokes equations break down at micrometer scales, while the computational times of applicable molecular-dynamics codes become exorbitant. A two-dimensional finite-element based microscale flow model is developed to efficiently predict the overall flow characteristics up to the transition regime for reasonably high Knudsen number flow inside microchannels and nanopores. Presented two-dimensional numerical results for Poiseuille flow of a simple fluid through the microchannel are comparable to the numerical and experimental data published in the literature. The nanopore solutions are also validated with presented experimental data.

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Section: Methodsmentioning

confidence: 99%

Modeling gas flow through microchannels and nanopores

Roy

Raju

Chuang

et al. 2003

Journal of Applied Physics

565

329

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“…The separation processes in gas membranes have been studied using permeation test equipment at elevated temperatures and a range of pressures [20,21,22,23,24,25,26]. These methods also rely on pressure measurement to monitor the gas transport.…”

Section: Introductionmentioning

confidence: 99%

Permeation of a Range of Species through Polymer Layers under Varying Conditions of Temperature and Pressure: In Situ Measurement Methods

Craster

Jones

2019

Polymers

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Minimising the transport of corrosive reactants such as carbon dioxide, hydrogen sulfide and chloride ions to the surfaces of carbon steel pipes by the use of polymer barrier layers is of major interest in the oil and gas sector. In these applications, there is a requirement to assess the performance of these barrier layers although it is difficult to perform long-term predictions of barrier properties from the results of short-term measurements. New methodologies have been successfully developed to study the permeability of carbon dioxide (CO2) and hydrogen sulfide (H2S) through polymer layers under variable conditions of elevated temperatures of 100 °C and pressures of the order of 400 barg. In situ variation of the temperature and the inlet pressure of the gas (or gas mixture) allowed the activation energy and pressure dependence of the permeability to be determined without outgassing of the specimen. These methodologies have been applied to the measurement of the permeability of moulded polyphenylene sulfide (PPS) to supercritical CO2 in the presence of H2S. The diffusion coefficients of sodium chloride and potassium chloride through both PPS and polyether ether ketone (PEEK) at ambient temperature and pressure have also been measured.

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“…High gas permeability level of these polymers was caused by the presence of spherical bulky groups (e.g., trimethylsilyl groups or trimethylgermyl groups) and rigid polymer chains which disrupt a dense polymer chain package . Bulky SiMe 3 groups were also introduced into other classes of polymers (polyacetylenes, polystyrenes, polysulfones, poly(phenylene oxide), polyolefins). In all of the mentioned polymers an increase in gas permeability was observed in comparison with non‐silylated polymers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Gas-Transport Properties of Metathesis Polytricyclononenes Bearing Three Me₃ Si Groups per Monomer Unit

Chapala

Бермешев

Старанникова

et al. 2016

Macromol. Chem. Phys.

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A new metathesis polynorbornene containing three SiMe3 groups per monomer unit directly connected to the norbornene moiety via SiC bonds is synthesized. The ring‐opening metathesis polymerization of sterically hindered 3,3,4‐tris(trimethylsilyl)tricyclononene‐7 is successfully conducted in yields 80–85% in the presence of first generation Grubbs catalyst. The corresponding polymer is obtained with molecular weight Mw up to 5.4 × 105 Da. It is an amorphous glassy (Tg = 200 °C) polymer with high thermal stability. Gas permeability and diffusivity coefficients are studied for a range of gases (He, H2, O2, N2, CO2, CH4). This polymer containing three SiMe3 groups per monomer unit turns out to be more permeable (P(O2) = 125 Barrer) than similar polymers with one or two SiMe3 groups per monomer unit (P(O2) = 30–50 Barrer). Wide angle X‐ray diffraction, positron annihilating lifetime spectroscopy, as well as Brunauer–Emmett–Teller investigations are also performed and discussed.

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Manometric techniques for determination of gas transport parameters in membranes. Application to the study of dense and asymmetric poly(vinyltrimethylsilane) membranes

Cited by 20 publications

References 7 publications

Modeling gas flow through microchannels and nanopores

Modeling gas flow through microchannels and nanopores

Permeation of a Range of Species through Polymer Layers under Varying Conditions of Temperature and Pressure: In Situ Measurement Methods

Synthesis and Gas-Transport Properties of Metathesis Polytricyclononenes Bearing Three Me₃ Si Groups per Monomer Unit

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Manometric techniques for determination of gas transport parameters in membranes. Application to the study of dense and asymmetric poly(vinyltrimethylsilane) membranes

Cited by 20 publications

References 7 publications

Modeling gas flow through microchannels and nanopores

Modeling gas flow through microchannels and nanopores

Permeation of a Range of Species through Polymer Layers under Varying Conditions of Temperature and Pressure: In Situ Measurement Methods

Synthesis and Gas-Transport Properties of Metathesis Polytricyclononenes Bearing Three Me3 Si Groups per Monomer Unit

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Product

Resources

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Synthesis and Gas-Transport Properties of Metathesis Polytricyclononenes Bearing Three Me₃ Si Groups per Monomer Unit