Rapid Gas Transport from Block-Copolymer Templated Nanoporous Carbon Films
نویسندگان
چکیده
Porous carbon films, attributed to their superior thermal and chemical robustness, are attractive for a number of applications. In the context molecular separation, major focus has been on films where effective pore diameter is lower than 1 nm, e.g., sieves. Only handful reports available hosting 2–3 nm size channels gas transport mainly takes place by Knudsen diffusion in contrast activated transport. Recently, we reported nanoporous (NPC) pyrolysis phase-separated block-copolymer/turanose as gas-permeable mechanical reinforcement crack-free synthesis single-layer graphene membranes. However, dedicated study nanostructure properties standalone NPC film missing. Herein, show that perforated lamellar (PL) limited an interlamellar spacing ∼2 nm. The unique PL originates from its precursor, i.e., block-copolymer stabilized hydrogen bonding with carbohydrate additive, latter also acts main carbon-forming agent. This highly sensitive carbohydrate/block-copolymer ratio gives way lacey structure below 2:1. gases through predominantly regime, determined mass. Attributed thickness 100 yields extremely rapid H2 permeance over two million permeation units (GPU) H2/CO2 selectivity 4.5 temperature range 25–300 °C. These make promising membrane support good choice high-permeance two-dimensional membranes separation.
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ژورنال
عنوان ژورنال: Industrial & Engineering Chemistry Research
سال: 2021
ISSN: ['0888-5885', '1520-5045']
DOI: https://doi.org/10.1021/acs.iecr.1c03039