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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 &lt; 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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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