Investigation of a new co-polyimide, 6FDA-bisP and its ZIF-8 mixed matrix membranes for CO2/CH4 separation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915961" target="_blank" >RIV/60461373:22310/18:43915961 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1383586618302648?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586618302648?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.seppur.2018.06.067" target="_blank" >10.1016/j.seppur.2018.06.067</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of a new co-polyimide, 6FDA-bisP and its ZIF-8 mixed matrix membranes for CO2/CH4 separation
Original language description
The ZIF-8 zeolitic imidazolate framework (ZIF) is known to enhance gas separation properties of a mixed matrix membrane (MMM) due to its inherent molecular sieving properties. We prepared ZIF-8 nanoparticles (NPs) in several particle sizes, characterized and incorporated (only the NPs with < 100 nm) into a newly studied 6FDA-copolyimide, 6FDA-bisP between 5 and 20 wt% loadings. The 6FDA-bisP co-polyimide membrane, consisting of multiple aromatic rings in its diamine moieties, was obtained from two fabrication protocols after the synthesis of its 10 wt% polymer concentration poly(amic) acid (PAA) (protocol M1, direct synthesis; M2, with an additional precipitation step). The NPs and MMMs were characterized accordingly using XRD, DLS, BET, SEM, FTIR, TGA and DSC. Free fractional volume (FFV) was calculated using solid density, measured by helium pycnometry. Gas separation performance was evaluated by feeding an equimolar mixture of CO2 and CH4 at a constant pressure of 5 bar, at 25 degrees C. The new 6FDA-bisP, obtained from protocol M2 presented higher performances of 35.3 Barrer for CO2 permeability (P-CO2) and 25.6 for CO2/CH4 selectivity (alpha(CO2/CH4)), comparable to several commercial polymer membranes. Its ZIF-8 MMMs showed not only significant FFV increment but also 130% and 37% improvements for P-CO2 and alpha(CO2/CH4), respectively, with the optimum loading of 15 wt% ZIF-8. The positive findings revealed the new 6FDA-copolyimide has the potential for CO2/CH4 separation, and ZIF-8 incorporation further enhanced its gas separation performances.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20401 - Chemical engineering (plants, products)
Result continuities
Project
<a href="/en/project/LO1613" target="_blank" >LO1613: Future materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Separation and Purification technology
ISSN
1383-5866
e-ISSN
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Volume of the periodical
207
Issue of the periodical within the volume
22 December 2018
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
523-534
UT code for WoS article
000445987500058
EID of the result in the Scopus database
2-s2.0-85049577981