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- Title
Sub-micro porous thin polymer membranes for discriminating H<sub>2</sub> and CO<sub>2</sub>.
- Authors
Yan, Xueru; Song, Tianqi; Li, Min; Wang, Zhi; Liu, Xinlei
- Abstract
Polymeric membranes with high permeance and remarkable selectivity for simultaneous H2 purification and CO2 capture under industry-relevant conditions are absent. Herein, sub-micro pores with precise molecular sieving capability are created in ultra-thin (13–30 nm) polymer membranes via controllable transformation of amine-linked polymer (ALP) films into benzimidazole-and-amine-linked polymer (BIALP) layers. The BIALP membranes exhibit stable unprecedented H2/CO2 selectivity of 120 with a H2 permeance of 315 GPU. Furthermore, high pressure (up to 11 bar) and thermal (up to 300 °C) resistance is delivered. This work provides a concept on designing porous polymeric membranes for precise molecular discrimination. The fabrication of polymeric membranes with high permeance and remarkable selectivity for simultaneous H2 purification and CO2 capture is challenging. Here, the authors design a polymer membrane with sub-micro pores via controlled transformation of amine-linked polymer films into benzimidazole- and amine-linked polymer layers.
- Subjects
POROUS polymers; POLYMER films; MOLECULAR sieves; POLYMERIC membranes; POLYMERS
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-45007-6