| Autor: |
Maserati, L, Meckler, SM, Bachman, JE, Long, JR, Helms, BA |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Maserati, L; Meckler, SM; Bachman, JE; Long, JR; & Helms, BA. (2017). Diamine-Appended Mg2(dobpdc) Nanorods as Phase-Change Fillers in Mixed-Matrix Membranes for Efficient CO2/N2 Separations. Nano Letters, 17(11), 6828-6832. doi: 10.1021/acs.nanolett.7b03106. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/5t17d295 |
| DOI: |
10.1021/acs.nanolett.7b03106. |
| Popis: |
© 2017 American Chemical Society. 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. Here 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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