TY - JOUR
T1 - Temperature Dependence of Gas Permeation and Diffusion in Triptycene-Based Ultrapermeable Polymers of Intrinsic Microporosity.
AU - Fuoco, Alessio
AU - Comesaña-gándara, Bibiana
AU - Longo, Mariagiulia
AU - Esposito, Elisa
AU - Monteleone, Marcello
AU - Rose, Ian
AU - Bezzu, C. Grazia
AU - Carta, Mariolino
AU - Mckeown, Neil B.
AU - Jansen, Johannes Carolus
PY - 2018/10/24
Y1 - 2018/10/24
N2 - A detailed analysis of the basic transport parameters of two triptycene-based polymers of intrinsic microporosity (PIMs), the ultrapermeable PIM-TMN-Trip and the more selective PIM-BTrip, as a function of temperature from 25°C to 55°C, is reported. For both PIMs, high permeability is based on very high diffusion and solubility coefficients. The contribution of these two factors on the overall permeability is affected by the temperature and depends on the penetrant dimensions. Energetic parameters of permeability, diffusivity and solubility are calculated using Arrhenius-van’t Hoff equations and compared with those of the archetypal PIM-1 and the ultrapermeable but poorly selective poly(trimethylsilylpropyne) (PTMSP). This considers, for the first time, the role of entropic and energetic selectivities in the diffusion process through highly rigid PIMs. This analysis demonstrates how energetic selectivity dominates the gas transport properties of the highly rigid triptycene PIMs and enhances the strong size-sieving character of these ultrapermeable polymers.
AB - A detailed analysis of the basic transport parameters of two triptycene-based polymers of intrinsic microporosity (PIMs), the ultrapermeable PIM-TMN-Trip and the more selective PIM-BTrip, as a function of temperature from 25°C to 55°C, is reported. For both PIMs, high permeability is based on very high diffusion and solubility coefficients. The contribution of these two factors on the overall permeability is affected by the temperature and depends on the penetrant dimensions. Energetic parameters of permeability, diffusivity and solubility are calculated using Arrhenius-van’t Hoff equations and compared with those of the archetypal PIM-1 and the ultrapermeable but poorly selective poly(trimethylsilylpropyne) (PTMSP). This considers, for the first time, the role of entropic and energetic selectivities in the diffusion process through highly rigid PIMs. This analysis demonstrates how energetic selectivity dominates the gas transport properties of the highly rigid triptycene PIMs and enhances the strong size-sieving character of these ultrapermeable polymers.
U2 - 10.1021/acsami.8b13634
DO - 10.1021/acsami.8b13634
M3 - Article
SN - 1944-8244
VL - 10
SP - 36475
EP - 36482
JO - ACS Applied Materials & Interfaces
JF - ACS Applied Materials & Interfaces
IS - 42
ER -