Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents
The excellent thermal and chemical stability of monolayer graphene makes it an ideal material for separations at high temperatures and in harsh organic solvents. Here, based on understanding of solvent permeation through nanoporous graphene via molecular dynamics simulation, a resistance model was e...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Proceedings of the National Academy of Sciences
2022
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| Online Access: | https://hdl.handle.net/1721.1/138833 |
| _version_ | 1811091501603618816 |
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| author | Lu, Yanqiu Zhang, Liling Shen, Liang Liu, Wei Karnik, Rohit Zhang, Sui |
| author_facet | Lu, Yanqiu Zhang, Liling Shen, Liang Liu, Wei Karnik, Rohit Zhang, Sui |
| author_sort | Lu, Yanqiu |
| collection | MIT |
| description | The excellent thermal and chemical stability of monolayer graphene makes it an ideal material for separations at high temperatures and in harsh organic solvents. Here, based on understanding of solvent permeation through nanoporous graphene via molecular dynamics simulation, a resistance model was established to guide the design of a defect-tolerant graphene composite membrane consisting of monolayer graphene on a porous supporting substrate. Guided by the model, we experimentally engineered polyimide (PI) supporting substrates with appropriate pore size, permeance, and excellent solvent resistance and investigated transport across the resulting graphene-covered membranes. The cross-linked PI substrate could effectively mitigate the impacts of leakage through defects across graphene to allow selective transport without defect sealing. The graphene-covered membrane showed pure solvent permeance of 24.1 L m<jats:sup>−2</jats:sup> h<jats:sup>−1</jats:sup> bar<jats:sup>−1</jats:sup> and stable rejection (∼90%) of Allura Red AC (496.42 g mol<jats:sup>−1</jats:sup>) in a harsh polar solvent, dimethylformamide (DMF), at 100 °C for 10 d. |
| first_indexed | 2024-09-23T15:03:23Z |
| format | Article |
| id | mit-1721.1/138833 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:03:23Z |
| publishDate | 2022 |
| publisher | Proceedings of the National Academy of Sciences |
| record_format | dspace |
| spelling | mit-1721.1/1388332022-01-06T03:07:32Z Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents Lu, Yanqiu Zhang, Liling Shen, Liang Liu, Wei Karnik, Rohit Zhang, Sui The excellent thermal and chemical stability of monolayer graphene makes it an ideal material for separations at high temperatures and in harsh organic solvents. Here, based on understanding of solvent permeation through nanoporous graphene via molecular dynamics simulation, a resistance model was established to guide the design of a defect-tolerant graphene composite membrane consisting of monolayer graphene on a porous supporting substrate. Guided by the model, we experimentally engineered polyimide (PI) supporting substrates with appropriate pore size, permeance, and excellent solvent resistance and investigated transport across the resulting graphene-covered membranes. The cross-linked PI substrate could effectively mitigate the impacts of leakage through defects across graphene to allow selective transport without defect sealing. The graphene-covered membrane showed pure solvent permeance of 24.1 L m<jats:sup>−2</jats:sup> h<jats:sup>−1</jats:sup> bar<jats:sup>−1</jats:sup> and stable rejection (∼90%) of Allura Red AC (496.42 g mol<jats:sup>−1</jats:sup>) in a harsh polar solvent, dimethylformamide (DMF), at 100 °C for 10 d. 2022-01-05T19:30:42Z 2022-01-05T19:30:42Z 2021-09-14 2022-01-05T19:21:46Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/138833 Lu, Yanqiu, Zhang, Liling, Shen, Liang, Liu, Wei, Karnik, Rohit et al. 2021. "Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents." Proceedings of the National Academy of Sciences, 118 (37). en 10.1073/pnas.2111360118 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Proceedings of the National Academy of Sciences PNAS |
| spellingShingle | Lu, Yanqiu Zhang, Liling Shen, Liang Liu, Wei Karnik, Rohit Zhang, Sui Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title | Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title_full | Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title_fullStr | Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title_full_unstemmed | Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title_short | Monolayer graphene membranes for molecular separation in high-temperature harsh organic solvents |
| title_sort | monolayer graphene membranes for molecular separation in high temperature harsh organic solvents |
| url | https://hdl.handle.net/1721.1/138833 |
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