Mixed Matrix Membranes Based on Polyamide/Montmorillonite for Pervaporation of Methanol–Toluene Mixture

Star-shaped macromolecules with six arms of polystyrene grafted onto a fullerene C 60 core, or fullerene-containing polystyrene (FPS), were used for the modification of poly(phenylene oxide) (PPO) and the preparation of a dense thin-film membrane. The membrane structure was studied using scanning electron microscopy. The effect of FPS modifier on membrane density and mass transfer of methanol and ethylene glycol through the membrane was studied. Sorption and pervaporation tests were used to determine degree of sorption, diffusion coefficients, flux through the membrane and separation factor. In the pervaporation of a methanol-ethylene glycol mixture over the concentration range of 10-30 wt% methanol in the feed, all membranes showed high affinity to methanol. The separation factor reached a maximum at 5 wt% FPS in the membrane. The PPO/FPS membranes exhibit the best separation properties when the feed is enriched with ethylene glycol.

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“…The separation factor α methanol/EG was defined as follows:

α_{methanol true/ normalE normalG} = ((), \frac{Y_{methanol}}{Y_{normalE normalG}}) true/ ((), \frac{X_{methanol}}{X_{normalE normalG}})

where Y and X are the weight fractions of component in the permeate and feed, respectively.…”

Section: Methodsmentioning

confidence: 99%

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

et al. 2016

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“…The transport properties of the copolyamides synthesized in this work were compared with literature data for the case of the pervaporation separation of a methanol–toluene mixture (70:30 wt %). Table 2 shows data on the total flux and methanol concentration in permeate obtained for different polymers and their compositions from a number of papers [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. The last two columns show the methanol permeance and selectivity of the films calculated from the reported data with Equations (11) and (12).…”

Section: Resultsmentioning

confidence: 99%

“…To separate a methanol–toluene mixture, membranes based on cellulose derivatives, polyimide, polyamide, polyphenylene oxide, polysiloxane, chitosane etc. have been used [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Comparative analysis of these membranes and novel coPA membranes for pervaporation of a methanol–toluene mixture in composition close to the azeotropic point was among the objectives of the present work.…”

Section: Introductionmentioning

confidence: 99%

Aromatic Copolyamides with Anthrazoline Units in the Backbone: Synthesis, Characterization, Pervaporation Application

et al. 2016

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Copolyamides with anthrazoline units in the backbone (coPA) were synthesized and dense nonporous films were prepared by solvent evaporation. Glass transition temperature, density, and fractional free volume were determined for the dense nonporous films composed of polyamide and two of its copolymers containing 20 and 30 mol % anthrazoline units in the backbone. Transport properties of the polymer films were estimated by sorption and pervaporation tests toward methanol, toluene, and their mixtures. An increase in anthrazoline fragments content leads to an increasing degree of methanol sorption but to a decreasing degree of toluene sorption. Pervaporation of a methanol–toluene mixture was studied over a wide range of feed concentration (10–90 wt % methanol). Maximal separation factor was observed for coPA-20 containing 20 mol % fragments with anthrazoline units; maximal total flux was observed for coPA-30 with the highest fractional free volume.

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“…Surface tension of water and ethanol at 20 • C are equal to 72.4 and 21.4 mN/m, respectively [38]. Data on measured contact angles were used to calculate membrane surface tension (σs) via the Owens-Wendt method [39,40].…”

Section: Membrane Characterizationmentioning

confidence: 99%

Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures

et al. 2020

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The wide possibilities of designing a chemical structure and creating complexes with transition metals make polymers of heteroaromatic structure interesting objects, from both scientific and practical aspects. In this work, modern biquinoline-containing polymers, namely polyester amide (PEA) and its metal–polymer complex (PEA–Cu(I)), were synthesized and used to form dense flat membranes. A comparative study of their morphology, same physical properties (density, free volume, and contact angles), and thermomechanical characteristics was carried out. The transport properties of the modern membranes were studied during pervaporation, to solve a problem of n-heptane isolation from its binary mixtures with thiophene and methanol. It was shown that only the PEA membrane is selective for the separation of thiophene impurities from the mixture with n-heptane. In pervaporation of methanol/n-heptane mixture, the РЕА–Cu(I) membrane exhibits significantly higher pervaporation separation index, as compared with that of the РЕА membrane.

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Mixed Matrix Membranes Based on Polyamide/Montmorillonite for Pervaporation of Methanol–Toluene Mixture

Cited by 24 publications

References 35 publications

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

Aromatic Copolyamides with Anthrazoline Units in the Backbone: Synthesis, Characterization, Pervaporation Application

Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures

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Mixed Matrix Membranes Based on Polyamide/Montmorillonite for Pervaporation of Methanol–Toluene Mixture

Cited by 24 publications

References 35 publications

Effect of polystyrene stars with fullerene C60cores on pervaporation properties of poly(phenylene oxide) membrane

Effect of polystyrene stars with fullerene C60cores on pervaporation properties of poly(phenylene oxide) membrane

Aromatic Copolyamides with Anthrazoline Units in the Backbone: Synthesis, Characterization, Pervaporation Application

Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures

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Product

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About

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane