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- W3087777402 abstract "Graphene oxide (GO) was modified using isocyanate (MDI) and ethylenediaminetetraacetic acid (EDTA) for the fabrication of flat-sheet GO-MDI-EDTA composite. Subsequently, this composite was incorporated into the Matrimid ® (PI) matrix to fabricate mixed matrix membranes (MMMs) for CO 2 separation. The influence of GO-MDI-EDTA composite on the CO 2 separation properties of PI was evaluated. Scanning electron microscopy showed that GO-MDI-EDTA enhanced the interface compatibility with the polymer matrix. MMMs showed significantly enhanced CO 2 permeability compared with pure Matrimid ® membrane. The improvement of CO 2 separation performance can be attributed to the uniform dispersion of GO-MDI-EDTA sheets in the PI matrix. The carboxylic group contained in GO-MDI-EDTA has a good affinity with CO 2 , and the increased carboxyl sites can effectively transport CO 2 . The GO-MDI-EDTA lamellar structure increased the gas transmission path, which is not conducive to the passage of large dynamic diameter gases (CH 4 , N 2 ), thereby improving the separation performance. The MMMs doped with GO-MDI-EDTA-0.5% showed optimal gas separation performance. The CO 2 permeability is 12.85 Barrer, the CO 2 /N 2 selectivity is 47.59, and the CO 2 /CH 4 selectivity is 53.54." @default.
- W3087777402 created "2020-10-01" @default.
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- W3087777402 date "2020-09-25" @default.
- W3087777402 modified "2023-10-15" @default.
- W3087777402 title "Enhanced CO<sub>2</sub> separation properties by incorporating acid-functionalized graphene oxide into polyimide membrane" @default.
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- W3087777402 doi "https://doi.org/10.1177/0954008320960514" @default.
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