Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia.
Molecules. 2021 Feb 13;26(4):990. doi: 10.3390/molecules26040990.
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 O/N mixture.
新型聚酰胺-酰亚胺 Torlon 基聚合物复合材料和深共熔溶剂（DES）被制备并适用于分离过程。DES 由氯化锌和乙酰胺以 1:3 M 的比例组成，首先被选择作为 Torlon 的改性剂，因为有可能通过氢键的形成，用 DES 均匀填充复合材料。通过扫描电子显微镜和 X 射线衍射分析研究了膜的结构；通过热重分析和质谱法确定了热稳定性。通过渗透蒸发和气体分离等膜方法研究了传输性能。结果发现，DES 的加入导致复合材料的结构和表面性质发生显著变化。还表明，DES 起到增塑剂的作用，并提高了液体和气体分离中的分离性能。少量改性剂的 Torlon/DES 复合材料在醇脱水方面效果显著，并且在异丙醇中主要渗透水杂质。Torlon/DES-5 在 O/N 混合物的气体分离中表现出高选择性。
