Based on the results of research works reflected in the scientific literature, the main examples, methods and approaches to the development of polymer inorganic nanocomposite materials for target membranes are considered. The focus is on membranes for critical technologies with improved mechanical, thermal properties that have the necessary capabilities to solve the problems of a selective pervaporation. For the purpose of directional changes in the parameters of membranes, effects on their properties of the type, amount and conditions of nanoparticle incorporation into the polymer matrix were analyzed. An influence of nanoparticles on the structural and morphological characteristics of the nanocomposite film is considered, as well as possibilities of forming transport channels for separated liquids are analyzed. Particular attention is paid to a correlation of nanocomposite structure-transport properties of membranes, whose separation characteristics are usually considered within the framework of the diffusion-sorption mechanism.

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The current image by Svetlana Viktorovna Kononova, Denis Sapegin, and colleagues represents phase heterogeneity between sulfonated polyimide and poly(amide-imide) polymer phases in the composite film with 7:3 polyimide to poly(amide-imide) weight ratio. Most likely, in this composite, a three-dimensional crystallizing network of polyimide is formed around poly(amide-imide) which is to form an amorphous phase. This assumption was confirmed by the data of the energy-dispersive analysis since it is in the region of the network structure sulfur atoms were detected, which are present in this composite only in the structure of sulfonated polyimide. ARTICLES 48159 Bio-based β-myrcene-modified solution-polymerized styrene-butadiene rubber for improving carbon black dispersion and wet skid resistance

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A series of novel asymmetric membranes from polymer composites of poly(amide-imide) with various content of sulfonated polyimide (1-6 wt%) was obtained through the nonsolvent-induced phase separation process. Selective transport properties of the obtained materials were investigated in terms of pervaporation separation of methanol/methyl-tert-butyl ether mixtures at different temperatures. The introduction of the sulfonated polyimide to the poly(amide-imide) matrix leads to a significant increase in membrane flux and an overall decrease in the process selectivity. Composite membranes having 1 wt% sulfonated polyimide in the matrix showed increased values of membrane flux (0.960 kg m −2 h −1 in comparison with 0.682 kg m −2 h −1 for unmodified membranes at 40 C, 10 wt% methanol), while having similar selectivity values (79.2 wt% methanol in permeate in comparison with 82 wt% for unmodified membranes at 40 C, 10 wt% methanol). Modified membrane showed the highest separation factor of 147 while separating methanol from its 3 wt% mixture with methyl-tert butyl ether at 52 C with the overall flux of 1.01 kg m −2 h −1. A semiempirical mathematical model was developed and applied to test the efficiency of obtained membranes in the hybrid process of methanol/methyl-tert-butyl ether mixtures separation.

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