Diamine-Appended Mg2 (dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations
Abstract
Despite the availability of chemistries to tailor the pore architectures of microporous polymer membranes for chemical separations, trade-offs in permeability and selectivity with functional group manipulations nevertheless persist, which ultimately places an upper bound on membrane performance. We introduce a new design strategy to uncouple these attributes of the membrane. Key to our success is the incorporation of phase-change metal-organic frameworks (MOFs) into the polymer matrix, which can be used to increase the solubility of a specific gas in the membrane, and thereby its permeability. We further show that it is necessary to scale the size of the phase-change MOF to nanoscopic dimensions, in order to take advantage of this effect in a gas separation. Our observation of an increase in solubility and permeability of only one of the gases during steady-state permeability measurements suggests fast exchange between free and chemisorbed gas molecules within the MOF pores. While the kinetics of this exchange in phase-change MOFs are not yet fully understood, their role in enhancing the efficacy and efficiency of the separation is clearly a compelling new direction for membrane technology.
- Authors:
-
[3];
[4];
[5]
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
- Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
- Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering
- Univ. of California, Berkeley, CA (United States). Dept. of Chemistry and Dept. of Chemical and Biomolecular Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1454495
- Grant/Contract Number:
- AC02-05CH11231; SC0001015
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 11; Related Information: © 2017 American Chemical Society.; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CO2/N2 separations; gas separations; mixed-matrix membranes; MOF nanocrystals; phase-change MOFs
Citation Formats
Maserati, Lorenzo, Meckler, Stephen M., Bachman, Jonathan E., Long, Jeffrey R., and Helms, Brett A. Diamine-Appended Mg2 (dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations. United States: N. p., 2017.
Web. doi:10.1021/acs.nanolett.7b03106.
Maserati, Lorenzo, Meckler, Stephen M., Bachman, Jonathan E., Long, Jeffrey R., & Helms, Brett A. Diamine-Appended Mg2 (dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations. United States. https://doi.org/10.1021/acs.nanolett.7b03106
Maserati, Lorenzo, Meckler, Stephen M., Bachman, Jonathan E., Long, Jeffrey R., and Helms, Brett A. Wed .
"Diamine-Appended Mg2 (dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations". United States. https://doi.org/10.1021/acs.nanolett.7b03106. https://www.osti.gov/servlets/purl/1454495.
@article{osti_1454495,
title = {Diamine-Appended Mg2 (dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations},
author = {Maserati, Lorenzo and Meckler, Stephen M. and Bachman, Jonathan E. and Long, Jeffrey R. and Helms, Brett A.},
abstractNote = {Despite the availability of chemistries to tailor the pore architectures of microporous polymer membranes for chemical separations, trade-offs in permeability and selectivity with functional group manipulations nevertheless persist, which ultimately places an upper bound on membrane performance. We introduce a new design strategy to uncouple these attributes of the membrane. Key to our success is the incorporation of phase-change metal-organic frameworks (MOFs) into the polymer matrix, which can be used to increase the solubility of a specific gas in the membrane, and thereby its permeability. We further show that it is necessary to scale the size of the phase-change MOF to nanoscopic dimensions, in order to take advantage of this effect in a gas separation. Our observation of an increase in solubility and permeability of only one of the gases during steady-state permeability measurements suggests fast exchange between free and chemisorbed gas molecules within the MOF pores. While the kinetics of this exchange in phase-change MOFs are not yet fully understood, their role in enhancing the efficacy and efficiency of the separation is clearly a compelling new direction for membrane technology.},
doi = {10.1021/acs.nanolett.7b03106},
journal = {Nano Letters},
number = 11,
volume = 17,
place = {United States},
year = {Wed Oct 18 00:00:00 EDT 2017},
month = {Wed Oct 18 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Advanced Porous Materials in Mixed Matrix Membranes
journal, July 2018
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