期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 9, 页码 4855-4864出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06070a
关键词
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资金
- EPSRC [EP/H000925/1]
- Science and Industry Endowment Fund, Australia
- Mahidol University, Thailand
- Engineering and Physical Sciences Research Council [EP/H000925/1] Funding Source: researchfish
The intermolecular interactions between the polymer of intrinsic microporosity PIM-1 and polycyclic aromatic hydrocarbons (PAHs) have been investigated with the aim of modifying the gas sorption and physical properties. Mixing PIM-1 with selected PAHs resulted in rapid precipitation of polymer. Blending PIM-1 with pyrene had a significant effect of the gas sorption properties of the resulting films; dramatically reduced N-2 uptake (77 K), whilst CO2 uptake at 298 K was only slightly reduced. A gate-opening behaviour was also observed for the N-2 gas sorption (77 K), which was related to the pyrene content of the blend. Using an electron-donating PAH as the additive resulted in a stronger interaction. By exploiting a post-modification strategy after PIM-1 film formation, the absorption of either pyrene or 1-aminopyrene produced films with higher elastic moduli and greatly improved CO2/N-2 gas sorption selectivities (293 K). Single gas permeability measurements revealed that while the 1-aminopyrene modified film possessed reduced CO2 permeability, it possessed enhanced CO2/N-2 selectivity. Importantly, the ageing of the permeability was halted over the 50 days tested, likely due to the physical crosslinking of the polymer chains by 1-aminopyrene.
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