Engineering CO2-philic pathway via grafting poly(ethylene glycol) on graphene oxide for mixed matrix membranes with high CO2 permeance
- Authors
- Lee, Chang Soo; Moon, Juyoung; Park, Jung Tae; Kim, Jong Hak
- Issue Date
- Feb-2023
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Mixed-matrix membrane (MMM); Thin-film; Carbon dioxide(CO2); Separation; Graphene oxide; Grafting
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.453
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 453
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/21533
- DOI
- 10.1016/j.cej.2022.139818
- ISSN
- 1385-8947
1873-3212
- Abstract
- The introduction of two-dimensional (2D) nanofillers into thin-film (<1 mu m thickness) mixed-matrix membranes (MMMs) remains challenging because of the interfacial issues that lead to Knudsen diffusion, thereby causing a loss of selectivity. Herein, we describe a surface modification technique that involves the application of an epoxy group ring opening process and free-radical polymerization to the graphene oxide (GO) surface to enable the grafting of CO2-philic poly(ethylene glycol) (PEG) chains. The use of functional groups to achieve the PEG modification of GO increases the interlayer spacing between the 2D GO layers. Specifically, the abundant PEG domain between the layers provides an effective CO2-philic pathway and minimizes the occurrence of polymer matrix/GO filler interfacial defects, resulting in excellent CO2 permeance and selectivity. The MMM consisting of GO-glycidyl methacrylate grafted with poly(oxyethylene methacrylate) achieved the highest performance, with a CO2 permeance of 3169 GPU, CO2/N2 selectivity of 37.4, and CO2/CH4 selectivity of 15.8. These results indicate the suitability of the as-prepared materials for commercial applications.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.