Molecular polyimide brushes as a novel membrane material for pervaporation processes

Мелешко, Т. К.; Pulyalina, Alexandra; Tyan, N. S.; Polotskaya, G. A.; Иванов, И. В.; Kukarkina, N. V.; Тойкка, А. М.; Yakimansky, Alexander V.

doi:10.1134/s1560090417020063

Cited by 9 publications

(7 citation statements)

References 34 publications

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“…The film density ( ρ , g cm −3 ) was estimated using the flotation method with a laboratory‐made measurement unit . Samples of 0.05 − 0.10 g were used; the error of measurements was ±0.002 g cm −3 .…”

Section: Methodsmentioning

confidence: 99%

“…PBOIs have been studied in ultrafiltration and gas separation membrane processes . They are the product of thermal treatment of their prepolymer, imide‐containing polyamic acids (PAAs), which contain functional groups in each monomer unit, and so they may be of interest as membrane materials for pervaporation . The unique pervaporation properties of PBOI membranes have been revealed in the effective separation of methanol − ethanol mixtures …”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of methanol selective membranes based on polyheteroarylene − Cu(I) complexes for purification of methyl tertiary butyl ether

et al. 2017

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A comparative study of metal − polymer complexes of Cu(I) with polybenzoxazinoneimide (PBOI) and its prepolymer imide-containing polyamic acid (PAA) as novel membrane materials for methyl tertiary butyl ether (MTBE) purification was undertaken. The structure, physical parameters and transport properties were characterized in detail to analyse the separation performance of the membranes and obtain new knowledge on the interdependence of the chemical structure and physical data with transport parameters. Thermally initiated conversion of PAA − Cu(I) to PBOI − Cu(I) was studied by TGA and DSC. The thermal conversion increases the polymer glass transition temperature and membrane density. Both polymers were applied to pervaporation separation of MTBE from methanol impurities. Membranes based on PAA are highly effective in MTBE purification and preferably permeate methanol. The transport properties of PAA − Cu(I) membrane are compared with those of known membranes.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of methanol selective membranes based on polyheteroarylene − Cu(I) complexes for purification of methyl tertiary butyl ether

et al. 2017

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“…The presence of several independently variable architectural parameters of molecular brushes, including the length of side chains and the grafting density, makes it possible to control characteristics of the resulting membrane material at the molecular level. Recently, the molecular brushes with polyimide (PI) backbone and poly(methyl methacrylate) side chains have been successfully used to modify polymer membranes for separation of liquid and gas mixtures 22–25 …”

Section: Introductionmentioning

confidence: 99%

“…Recently, the molecular brushes with polyimide (PI) backbone and poly(methyl methacrylate) side chains have been successfully used to modify polymer membranes for separation of liquid and gas mixtures. [22][23][24][25] Membrane pervaporation is a very promising technique for the separation of complex mixtures of liquid components, including close-boiling and azeotropic mixtures. [26][27][28] The use of pervaporation to separate mixtures of methanol (MeOH) and methyl tert-butyl ether (MTBE) (polar and nonpolar compounds) is caused by the fact that these components form an azeotropic mixture of 14.3 wt% methanol and 85.7 wt% MTBE at 20 С and 760 mmHg.…”

Section: Introductionmentioning

confidence: 99%

Copolyimide molecular brushes with poly(methacrylic acid) side chains as additive to polyphthalamide membrane: Organization, physical, and transport properties

Ivanov,

Polotskaya,

Kuryndin

et al. 2024

J of Applied Polymer Sci

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Macromolecules of complex architecture find application as modifiers of commercial polymeric membrane materials. In this work, copolyimide molecular brushes (coPI) composed of polyimide backbone and poly(methacrylic acid) side chains were used to modify poly(m‐phenylene iso‐phthalamide) (PPA). Structure, physical, mechanical, and transport properties of dense nonporous PPA/coPI membranes containing up to 10 wt% coPI were studied. The effect of included coPI on the membrane structure was estimated using atomic force microscopy and mechanical tests. The coPI modifier contributes to the additional formation of free volume elements evenly distributed throughout the membrane. Transport properties of PPA/coPI membranes were investigated via sorption tests and pervaporation separation of methanol (MeOH) and methyl tert‐butyl ether (MTBE) mixtures. The inclusion of coPI modifier in the PPA membrane leads to an increase in the total flux of the membrane. The highest separation factor was found for the PPA/coPI membrane containing 10 wt% coPI; transport properties of the best membrane were compared with the literature data on separation of the azeotropic MeOH–MTBE mixture.

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“…We previously showed that new film‐forming polymer molecular brushes PI‐PMMA: with polyimide (PI) backbone and poly(methyl methacrylate) (PMMA) side chains (Fig. ) can be used as effective pervaporation membranes for separation of water/isopropanol mixtures . In this work, PI‐PMMA molecular brushes were used as modifying components for known polymer membrane materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Macromolecular Brushes with Polyimide Backbones and Poly(methyl methacrylate) Side Chains on Structure, Physical, and Transport Properties of Polyphthalamide

Tian

Мелешко

Polotskaya

et al. 2019

Polymer Engineering & Sci

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Composite films based on polyamide (poly(m‐phenylene‐iso‐phthalamide)) (PA) and a brush‐like polymer with polyimide (PI) backbone and side poly(methyl methacrylate) chains (PI‐PMMA) were prepared by mixing individual solutions of PA and PI‐PMMA and subsequent film casting. Macromolecular brushes with the same backbone length and density of side chains but with various lengths of side PMMA chains were synthesized via activator generated by electron transfer atom transfer radical polymerization. Interactions between PA and PI‐PMMA, as well as distribution of PI‐PMMA filler inside the PA matrix, were studied by viscometry, dynamic light scattering, differential scanning calorimetry, scanning electron microscopy, and IR spectroscopy. The mechanical properties of polymer samples were also investigated. Microphase separation was revealed in PA/PI‐PMMA films. The length of side chains influences interactions between PA and PI‐PMMA. At the same time, the degree of reduction in the rigidity parameters and in the elasticity parameter depends on the side chain length. Diffusion membranes were prepared on the basis of compositions with the best mechanical properties; these membranes proved to be highly efficient in pervaporation of methanol–hexane mixture. It was established that the fluxes and separation factors of the studied membranes are several times higher as compared to the corresponding characteristics of known commercial membranes. POLYM. ENG. SCI., 60:481–490, 2020. © 2019 Society of Plastics Engineers

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Molecular polyimide brushes as a novel membrane material for pervaporation processes

Cited by 9 publications

References 34 publications

Preparation and characterization of methanol selective membranes based on polyheteroarylene − Cu(I) complexes for purification of methyl tertiary butyl ether

Preparation and characterization of methanol selective membranes based on polyheteroarylene − Cu(I) complexes for purification of methyl tertiary butyl ether

Copolyimide molecular brushes with poly(methacrylic acid) side chains as additive to polyphthalamide membrane: Organization, physical, and transport properties

Influence of Macromolecular Brushes with Polyimide Backbones and Poly(methyl methacrylate) Side Chains on Structure, Physical, and Transport Properties of Polyphthalamide

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