Polymeric membrane materials: New aspects of empirical approaches to prediction of gas permeability parameters in relation to permanent gases, linear lower hydrocarbons and some toxic gases

Malykh, O.V.; Golub, A.; Teplyakov, V. V.

doi:10.1016/j.cis.2010.10.004

Cited by 52 publications

(25 citation statements)

References 43 publications

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“…Correlation analysis of the polymer-gas system was carried out using the Teplyakov technique [52,53] through the dependence of the gas diffusion coefficient on the effective diameter of gas molecule, d. According to [52], experimental data on diffusion coefficients should belong to the straight line presented in logarithmic coordinates log D 5 f (d 2 ). Figure 8 shows the correlation dependence of diffusion coefficients on the squared effective diameter of gas molecules for PPO/ND films.…”

Section: Gas Transport Propertiesmentioning

confidence: 99%

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Polotskaya¹,

Avagimova²,

Тойкка

et al. 2017

Polymer Composites

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Considerable progress in the development of new materials is achieved due to the modification of polymer materials by carbon nanoparticles of various kinds. In this work new composites of nanodiamonds (ND) and poly (phenylene oxide) (PPO) were prepared by solid phase dispersing. Their solutions and dense nonporous films were studied by different techniques. The structure of the PPO/ND composites was examined by atomic force microscopy, dynamic light scattering, and birefringence. The increase of ND content in the film leads to a more complex structure because of accumulation of aggregates containing ND particles and PPO molecules. The physical and mechanical properties were exhaustively evaluated by measuring intrinsic viscosity, density, surface tension, the Young's modulus, yield stress, tensile strength, and ultimate strain. Gas transport properties were determined by measuring H2, CO2, N2, CH4, and O2 permeation. The gas permeability coefficients decrease slightly with an increase of the ND content in composites, but the ideal selectivity of gas separation increases at the same time. POLYM. COMPOS., 39:3952–3961, 2018. © 2017 Society of Plastics Engineers

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Section: Gas Transport Propertiesmentioning

confidence: 99%

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Polotskaya¹,

Avagimova²,

Тойкка

et al. 2017

Polymer Composites

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“…Correlation analysis of the gas permeability parameters of the PBOZ and PAA films was carried out using the Teplyakov technique, which is based on the dependence of the gas diffusion coefficient, D , on the effective kinetic diameter of gas molecule, d , through the equation:

\begin{matrix} true \\ right prefixlog D = K_{1} - K_{2} \times normald \end{matrix}

where K 1 and K 2 are constants. Usually, the coefficients of gas diffusion through a polymer matrix depend linearly on the diameter of gas molecules.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Polybenzoxazinone and its Prepolymer Using Gas Separation

Pientka

Brožová

Pulyalina

et al. 2013

Macro Chemistry & Physics

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Polybenz‐3,1‐oxazinone‐4 (PBOZ) films are prepared via the thermal rearrangement of poly[(methylene‐bis‐anthranilamide) 4,4′‐diphenyloxidicarboxylic acid] (PAA) films by heating to 300 °C. PAA is synthesized by low‐temperature polycondensation. The PBOZ film exhibits excellent mechanical properties and a high glass‐transition temperature. Conversion of PAA to PBOZ leads to an increase in the fractional free volume as a result of thermal dehydration and cyclization during membrane formation and due to the removal of residual solvent. The excess free volume in the PBOZ film is approximately 3–4% of the total volume. The gas permeability and selectivity of the PBOZ film is higher than that of the PAA film. The thermal rearrangement of polymers is recognized as a suitable method to improve separation efficiency.

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“…This fact can be caused by specific distribution of free volume elements in the film that was suggested earlier. [28] Correlation analysis of diffusion coefficients was carried out by the Teplyakov method [28,31] , which is based on the dependence of the gas diffusion coefficient D on the effective kinetic diameter of gas molecule d through the equation:…”

Section: Correlation Analysismentioning

confidence: 99%

Structure and Gas Transport Properties of Polybenzoxazinoneimides with Biquinoline Units in the Backbone

Polotskaya

Guliy

Goĭkhman

et al. 2015

Macromolecular Symposia

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Summary: Four polymers with heteroaromatic structures were synthesized starting from dichloroanhydride of 2,2 / -biquinoline-7,7 / -dicarboxylic acid. These are imidecontaining polyamic acid and product of its cyclization polybenzoxazinoneimide as well as complexes of these two polymers with Cu(I). Dense film membranes prepared from the four polymers were characterized in terms of their density and free volume. The gas permeabilities to H 2 , O 2 , N 2 , CO 2 , and CH 4 of the four films and the selectivities in separations of industrially important gas pairs were determined. Polymer chemical structures, polymer free volumes, diffusion coefficients and the sizes of gas molecules were correlated with polymer permeabilities. The prepared and investigated polymers show very good separation properties located near the upper bound lines in Robeson's diagrams.

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Polymeric membrane materials: New aspects of empirical approaches to prediction of gas permeability parameters in relation to permanent gases, linear lower hydrocarbons and some toxic gases

Cited by 52 publications

References 43 publications

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Synthesis and Characterization of Polybenzoxazinone and its Prepolymer Using Gas Separation

Structure and Gas Transport Properties of Polybenzoxazinoneimides with Biquinoline Units in the Backbone

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