Microporous membranes act as selective barriers and play an important role in industrial gas separation and water purification. The permeability of such membranes is inversely proportional to their thickness. Synthetic two-dimensional materials (2DMs), with a thickness of one to a few atoms or monomer-units are ideal candidates for developing separation membranes. In this Progress Report, we present groundbreaking advances in the design, synthesis, processing, and application of 2DMs for gas and ion separations, as well as water desalination. After the introduction in Section 1, this report describes the syntheses, structures, and mechanical properties of 2DMs in Section 2. In Section 3, we will discuss the established methods for processing 2DMs into selective permeation membranes and address the separation mechanism and their performances. Finally, current challenges and emerging research directions, which need to be addressed for developing next generation separation membranes, are summarized in the Conclusion and Perspective.

Microporous membranes act as selective barriers and play an important role in industrial gas separation and water purification. The permeability of such membranes is inversely proportional to their thickness. Synthetic two-dimensional materials (2DMs), with a thickness of one to a few atoms or monomer-units are ideal candidates for developing separation membranes. In this Progress Report, we present groundbreaking advances in the design, synthesis, processing, and application of 2DMs for gas and ion separations, as well as water desalination. After the introduction in Section 1, this report describes the syntheses, structures, and mechanical properties of 2DMs in Section 2. In Section 3, we will discuss the established methods for processing 2DMs into selective permeation membranes and address the separation mechanism and their performances. Finally, current challenges and emerging research directions, which need to be addressed for developing next generation separation membranes, are summarized in the Conclusion and Perspective.

Gegenstand dieser Arbeit ist es, die Temperaturbeständigkeit von bikontinuierlichen Kompositmembranen bestehend aus Zeolith 4A und Visiomer HEMATMDI zu überprüfen und das Verhalten ihrer Permeanz im Verlauf der Temperaturerhöhung zu untersuchen. Weiterhin wird ihre Verwendbarkeit für technisch und industriell relevante Prozesse der Gastrocknung nachgewiesen. Zunächst wird thermogravimetrisch untersucht, bei welcher Temperatur Zersetzungserscheinungen an der polymeren Komponente auftreten. Anschließend wird thermogravimetrisch der Wassergehalt von Zeolith 4A im Bereich dieser Temperatur bestimmt. Hierauf folgen Permeationsmessungen mit Sauerstoff und Stickstoff an der bikontinuierlichen Kompositmembran. Die Temperatur wird hierbei schrittweise bis knapp unter die Zersetzungstemperatur des Polymers erhöht. Die Eignung der Membranen zur Gastrocknung wird exemplarisch an der Trocknung von Erdgas gezeigt. Es werden die Permeanzen für Wasserdampf und Methan als Hauptbestandteil von Erdgas mittels Einzelgasmessungen experimentell bestimmt. Aus diesen Permeanzen errechnet sich die ideale Selektivität der bikontinuierlichen Kompositmembran von Wasserdampf gegenüber Methan. Mit ihrer Hilfe lässt sich die Eignung der Membran zur Trocknung von Erdgas abschätzen. / The aim of this work is to study the temperature resistance of bicontinuous composite membranes, composed zeolite 4A and Visiomer HEMATMDI, and their permeances with rising temperatures. Furthermore their suitability for gas drying is investigated.