Scalable Pillar[5]arene-Integrated Poly(arylate-amide) Molecular Sieve Membranes to Separate Light Gases
SCIE
SCOPUS
- Title
- Scalable Pillar[5]arene-Integrated Poly(arylate-amide) Molecular Sieve Membranes to Separate Light Gases
- Authors
- Song, Woochul; Park, Jaesung; Dasgupta, Subhadeep; Yao, Chenhao; Maroli, Nikhil; Behera, Harekrushna; Yin, Xinyang; Acharya, Durga P.; Zhang, Xueyi; Doherty, Cara M.; Maiti, Prabal K.; Freeman, Benny D.; Kumar, Manish
- Date Issued
- 2022-07
- Publisher
- American Chemical Society
- Abstract
- Molecular sieve membranes and their analogues could potentially transform energy-intensive gas separation processes. However, many such membranes suffer from either limited process ability 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 pillar[5]arene, m-phenylenediamine, and trimesoyl chloride to create characteristic poly(arylate-amide) heteropolymer microstructures. Pillar[S]arenes were crosslinked into the films with net weight fractions of up to similar to 47%, wherein the, 4.7 angstrom cavities of pillar[5]arenes were interconnected with similar to 2.8 angstrom apertures. These microstructures provided preferred permeation paths for smaller molecules (He and H-2) among the tested light gases (He, H-2, CO2, O-2, N-2, and CH4) and resulted in significant molecular sieving effects with representative pure gas selectivities of 32 (H-2/CO2), 150 (CO2/CH4), 4600 (H-2/CH4), 13 (O-2/N-2), and 4.7 (N-2/CH4) at 35 degrees 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/116330
- DOI
- 10.1021/acs.chemmater.2c01450
- ISSN
- 0897-4756
- Article Type
- Article
- Citation
- Chemistry of Materials, vol. 34, no. 14, page. 6559 - 6567, 2022-07
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