TY - JOUR
T1 - Synthesis and Characterization of a Novel Microporous Dihydroxyl-Functionalized Triptycene-Diamine-Based Polyimide for Natural Gas Membrane Separation
AU - Alaslai, Nasser Y.
AU - Ma, Xiaohua
AU - Ghanem, Bader
AU - Wang, Yingge
AU - Alghunaimi, Fahd
AU - Pinnau, Ingo
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by funding from the King Abdullah University of Science and Technology (KAUST).
PY - 2017/7/10
Y1 - 2017/7/10
N2 - An intrinsically microporous polyimide is synthesized in m-cresol by a one-pot high-temperature condensation reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and newly designed 2,6 (7)-dihydroxy-3,7(6)-diaminotriptycene (DAT1-OH). The 6FDA-DAT1-OH polyimide is thermally stable up to 440 °C, shows excellent solubility in polar solvents, and has moderately high Brunauer-Teller-Emmett (BET) surface area of 160 m2 g-1 , as determined by nitrogen adsorption at -196 °C. Hydroxyl functionalization applied to the rigid 3D triptycene-based diamine building block results in a polyimide that exhibits moderate pure-gas CO2 permeability of 70 Barrer combined with high CO2 /CH4 selectivity of 50. Mixed-gas permeation studies demonstrate excellent plasticization resistance of 6FDA-DAT1-OH with impressive performance as potential membrane material for natural gas sweetening with a CO2 permeability of 50 Barrer and CO2 /CH4 selectivity of 40 at a typical natural gas well partial pressure of 10 atm.
AB - An intrinsically microporous polyimide is synthesized in m-cresol by a one-pot high-temperature condensation reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and newly designed 2,6 (7)-dihydroxy-3,7(6)-diaminotriptycene (DAT1-OH). The 6FDA-DAT1-OH polyimide is thermally stable up to 440 °C, shows excellent solubility in polar solvents, and has moderately high Brunauer-Teller-Emmett (BET) surface area of 160 m2 g-1 , as determined by nitrogen adsorption at -196 °C. Hydroxyl functionalization applied to the rigid 3D triptycene-based diamine building block results in a polyimide that exhibits moderate pure-gas CO2 permeability of 70 Barrer combined with high CO2 /CH4 selectivity of 50. Mixed-gas permeation studies demonstrate excellent plasticization resistance of 6FDA-DAT1-OH with impressive performance as potential membrane material for natural gas sweetening with a CO2 permeability of 50 Barrer and CO2 /CH4 selectivity of 40 at a typical natural gas well partial pressure of 10 atm.
UR - http://hdl.handle.net/10754/625678
UR - http://onlinelibrary.wiley.com/doi/10.1002/marc.201700303/full
UR - http://www.scopus.com/inward/record.url?scp=85028582419&partnerID=8YFLogxK
U2 - 10.1002/marc.201700303
DO - 10.1002/marc.201700303
M3 - Article
C2 - 28691317
SN - 1022-1336
VL - 38
SP - 1700303
JO - Macromolecular Rapid Communications
JF - Macromolecular Rapid Communications
IS - 18
ER -