Scalable Pillar[5]arene-Integrated Poly(arylate-amide) Molecular Sieve Membranes to Separate Light Gases

Song, W and Park, J and Dasgupta, S and Yao, C and Maroli, N and Behera, H and Yin, X and Acharya, DP and Zhang, X and Doherty, CM and Maiti, PK and Freeman, BD and Kumar, M (2022) Scalable Pillar[5]arene-Integrated Poly(arylate-amide) Molecular Sieve Membranes to Separate Light Gases. In: Chemistry of Materials, 34 (14). pp. 6559-6567.

PDF che_mat_34-14_6559-6567_2022.pdf - Published Version Restricted to Registered users only Download (5MB) | Request a copy

Abstract

Molecular sieve membranes and their analogues could potentially transform energy-intensive gas separation processes. However, many such membranes suffer from either limited processability or physical stability including plasticization of semi-flexible microstructures. Here, we report on a new variation of all-polymer-based molecular sieve membranes that could tackle these specific challenges. These membranes were prepared by the interfacial polymerization of pillar5arene, m-phenylenediamine, and trimesoyl chloride to create characteristic poly(arylate-amide) heteropolymer microstructures. Pillar5arenes were crosslinked into the films with net weight fractions of up to 47%, wherein the 4.7 à cavities of pillar5arenes were interconnected with 2.8 à apertures. These microstructures provided preferred permeation paths for smaller molecules (He and H2) among the tested light gases (He, H2, CO2, O2, N2, and CH4) and resulted in significant molecular sieving effects with representative pure gas selectivities of 32 (H2/CO2), 150 (CO2/CH4), 4600 (H2/CH4), 13 (O2/N2), and 4.7 (N2/CH4) at 35 °C and 10 atm. These separation factors outperform most polymer-based gas separation membranes, while providing membrane features such as thin film barriers, cross-linked polymer backbones, and excellent processability resulting from interfacial polymerization that are critical for large-scale operations.

Item Type:	Journal Article
Publication:	Chemistry of Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Amides; Aromatic hydrocarbons; Chlorine compounds; Crosslinking; Gas permeable membranes; Gases; Microstructure; Molecular sieves; Polymerization; Separation; Sieves, Energy; Gas separation process; Interfacial polymerization; Light gas; M phenylenediamine; Molecular sieve membranes; Physical stability; Polyarylate; Polymer based; Processability, Carbon dioxide
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	30 Aug 2022 12:03
Last Modified:	30 Aug 2022 12:03
URI:	https://eprints.iisc.ac.in/id/eprint/76287

Actions (login required)

View Item