Realization of Intermolecular Interactions as a Basis for Controlling Pervaporation Properties of Membranes Made of Aromatic Polyamide-Imides

New aromatic co-polyamide-imides (coPAIs) containing both carboxyl and hydroxyl groups in the repeating units were synthesized for the first time. Transport, thermal and morphological properties of dense nonporous membranes from PAIs obtained using the diacid chloride of 2-(4-carboxyphenyl)-1,3-diox...

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Bibliographic Details
Published in:Membranes (Basel) 2025-01, Vol.15 (1), p.23
Main Authors: Kononova, Svetlana V, Gubanova, Galina N, Lebedeva, Galina K, Kruchinina, Elena V, Vlasova, Elena N, Popova, Elena N, Zakharova, Natalya V, Vylegzhanina, Milana E, Novozhilova, Elena A, Danilova, Ksenia V
Format: Article
Language:English
Subjects:
Aminophenol
Aramid fibers
Carboxylic acids
Chloride
Chloride transport
Composite materials
Diamines
Functional groups
Hydrogen bonds
Hydroxyl groups
Imides
Influence
Investigations
Membrane permeability
Membranes
Molecular chains
o-Aminophenol
Permeability
Pervaporation
Polyamide resins
Polyamide-imides
Polyamides
Polyimideamides
Polymer blends
Polymers
Solvents
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Summary:New aromatic co-polyamide-imides (coPAIs) containing both carboxyl and hydroxyl groups in the repeating units were synthesized for the first time. Transport, thermal and morphological properties of dense nonporous membranes from PAIs obtained using the diacid chloride of 2-(4-carboxyphenyl)-1,3-dioxoisoindoline-5-carboxylic acid and diamines 5,5'-methylene-bis (2-aminophenol)) and 3,5-Diaminobenzoic acid, taken in molar ratios of 7:3, 1:1, and 3:7, have been studied. High levels of membrane permeability accompanied by high selectivity for mixtures of liquids with significantly different polarities were determined by realization of intra- and intermolecular interactions in polymer, which was proved by thermal analyses and hydrodynamic characteristics of coPAIs. This effect is discussed in the context of the effectiveness of intermolecular interactions between polymer chains containing carboxyl and hydroxyl functional groups.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes15010023