TY - JOUR

T1 - Development of Novel Polyamide-Imide/DES Composites and Their Application for Pervaporation and Gas Separation

AU - Pulyalina, Alexandra

AU - Rostovtseva, Valeriia

AU - Faykov, Ilya

AU - Tataurov, Maksim

AU - Dubovenko, Roman

AU - Shugurov, Sergey

N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/2/13

Y1 - 2021/2/13

N2 - Novel polymer composites based on polyamide–imide Torlon and deep eutectic solvent (DES) were fabricated and adapted for separation processes. DES composed of zinc chloride and acetamide in a ratio of 1:3 M was first chosen as a Torlon-modifier due to the possibility of creating composites with a uniform filling of the DES through the formation of hydrogen bonds. The structure of the membranes was investigated by scanning electron microscopy and X-ray diffraction analysis; thermal stability was determined by thermogravimetric analysis and mass spectrometry. The surface of the composites was studied by determining the contact angles and calculating the surface tension. The transport properties were investigated by such membrane methods as pervaporation and gas separation. It was found that the inclusion of DES in the polymer matrix leads to a significant change in the structure and surface character of composites. It was also shown that DES plays the role of a plasticizer and increases the separation performance in the separation of liquids and gases. Torlon/DES composites with a small amount of modifier were effective in alcohol dehydration, and were permeable predominantly to water impurities in isopropanol. Torlon/DES-5 demonstrates high selectivity in the gas separation of O2/N2 mixture.

AB - Novel polymer composites based on polyamide–imide Torlon and deep eutectic solvent (DES) were fabricated and adapted for separation processes. DES composed of zinc chloride and acetamide in a ratio of 1:3 M was first chosen as a Torlon-modifier due to the possibility of creating composites with a uniform filling of the DES through the formation of hydrogen bonds. The structure of the membranes was investigated by scanning electron microscopy and X-ray diffraction analysis; thermal stability was determined by thermogravimetric analysis and mass spectrometry. The surface of the composites was studied by determining the contact angles and calculating the surface tension. The transport properties were investigated by such membrane methods as pervaporation and gas separation. It was found that the inclusion of DES in the polymer matrix leads to a significant change in the structure and surface character of composites. It was also shown that DES plays the role of a plasticizer and increases the separation performance in the separation of liquids and gases. Torlon/DES composites with a small amount of modifier were effective in alcohol dehydration, and were permeable predominantly to water impurities in isopropanol. Torlon/DES-5 demonstrates high selectivity in the gas separation of O2/N2 mixture.

KW - olymer composites

KW - deep eutectic solvents

KW - polyamide–imide

KW - pervaporation

KW - gas separation

KW - polymer composites

KW - polyamide&#8211

KW - imide

UR - https://www.mdpi.com/1420-3049/26/4/990

UR - http://www.scopus.com/inward/record.url?scp=85102705782&partnerID=8YFLogxK

U2 - 10.3390/molecules26040990

DO - 10.3390/molecules26040990

M3 - Article

VL - 26

JO - Molecules

JF - Molecules

SN - 1420-3049

IS - 4

M1 - 990

ER -