TY - JOUR
T1 - Mitigation of physical aging with mixed matrix membranes based on crosslinked PIM-1 fillers and PIM-1
AU - Tamaddondar, Marzieh
AU - Foster, Andrew Bryan
AU - Carta, Mariolino
AU - Gorgojo, Patricia
AU - Mckeown, Neil B.
AU - Budd, Peter Martin
PY - 2020/10/14
Y1 - 2020/10/14
N2 - A low cross-link density (LCD) network-PIM-1, which offers high compatibility with the polymer of intrinsic microporosity PIM-1, is synthesized by a modified PIM-1 polycondensation that combines both a tetrafluoro- and an octafluoro-monomer. To maximize the advantages of utilizing such cross-linked PIM-1 fillers in PIM-1-based mixed matrix membranes (MMMs), a grafting route is used to decorate the LCD-network-PIM-1 (dispersed phase) with PIM-1 chains, to further enhance compatibility with the PIM-1 matrix. Mixed-gas CO2/CH4 (1:1, v/v) separation results over 160 days of membrane aging confirm the success of a relatively short (24 h) grafting reaction in improving the initial CO2 separation performance, as well as hindering the aging of PIM-1/grafted-LCD-network-PIM-1 MMMs. For MMMs based on a 24 h grafting route, all the gas separation data surpass the 2008 Robeson upper bound by a significant margin, and the 160-day aged membranes show only 29% reduction from the initial CO2 permeability, which is substantially less than the equivalent losses of nearly 70% and 48% for PIM-1 and traditionally fabricated MMMs counterparts, respectively. These results demonstrate the potential of network-PIM components for obtaining much more stable gas separation performance over extended periods of time.
AB - A low cross-link density (LCD) network-PIM-1, which offers high compatibility with the polymer of intrinsic microporosity PIM-1, is synthesized by a modified PIM-1 polycondensation that combines both a tetrafluoro- and an octafluoro-monomer. To maximize the advantages of utilizing such cross-linked PIM-1 fillers in PIM-1-based mixed matrix membranes (MMMs), a grafting route is used to decorate the LCD-network-PIM-1 (dispersed phase) with PIM-1 chains, to further enhance compatibility with the PIM-1 matrix. Mixed-gas CO2/CH4 (1:1, v/v) separation results over 160 days of membrane aging confirm the success of a relatively short (24 h) grafting reaction in improving the initial CO2 separation performance, as well as hindering the aging of PIM-1/grafted-LCD-network-PIM-1 MMMs. For MMMs based on a 24 h grafting route, all the gas separation data surpass the 2008 Robeson upper bound by a significant margin, and the 160-day aged membranes show only 29% reduction from the initial CO2 permeability, which is substantially less than the equivalent losses of nearly 70% and 48% for PIM-1 and traditionally fabricated MMMs counterparts, respectively. These results demonstrate the potential of network-PIM components for obtaining much more stable gas separation performance over extended periods of time.
KW - CO2 separation
KW - cross-linking
KW - grafting
KW - membrane aging
KW - mixed matrix membrane
KW - polymer of intrinsic microporosity (PIM)
UR - http://www.scopus.com/inward/record.url?scp=85092944467&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/c63d08e8-651d-38f9-8710-d5dfa70adb06/
UR - https://www.research.manchester.ac.uk/portal/en/publications/mitigation-of-physical-aging-with-mixed-matrix-membranes-based-on-crosslinked-pim1-fillers-and-pim1(b534b81b-5d58-48bb-84db-7b73973fc492).html
U2 - 10.1021/acsami.0c13838
DO - 10.1021/acsami.0c13838
M3 - Article
SN - 1944-8244
VL - 12
SP - 46756
EP - 46766
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 41
ER -