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Start Over Descriptor "Gas separation membrane" Language japanese
3 results on '"Gas separation membrane"'

1. Structure and Gas Separation Performances of Free-standing Covalent Organic Framework Films Synthesized by Alternating Vapor Deposition Polymerization.

Author

Masaki KATO, Takashi YANASE, and Toshihiro SHIMADA

Abstract

Two-dimensional or three-dimensional porous polymer known as the covalent organic framework (COF) has been gathering attention due to its unique properties such as low density, high stability, and tunable pore characteristics. The reported methods to synthesize practical COF films have inherent problems because they are liquid phase reactions. We have developed a new method to synthesize the COF film by alternating vapor deposition polymerization. The films annealed at 400°C for 10 minutes had a pore network structure with a diameter of 2.4-3.6 nm. From the gas permeation experiments, the COF films exhibited CO2 and N2 separation performances of 4.6 at the transmembrane pressure of 105 Pa. Numerical analysis and quantum chemical calculation suggest that the COF was more permeable to CO2 than N2 due to its greater affinity for CO2 compared to that for N2. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Studies on Time Dependence of the Gas Permeability of Poly(1-trimethylsilyl-1-propyne)

Author

Masuda, Toshio, Okamoto, Kouma, Sone, Takehumi, Sakaguchi, Toshikazu, Hashimoto, Tamotsu, Amaya, Naoyuki, and Mibae, Shiro

Subjects
Poly(1-trimethylsilyl-1-propyne), Substituted Polyacetylene, Gas Permeability, Time Dependence, Gas Separation Membrane, Oxygen-enriching membrane
Abstract

Poly(1-trimethylsilyl-1-propyne) (PTMSP) is one of the most gas permeable polymers among all the synthetic polymers. Its oxygen permeability coefficient (Po2) reaches up to about 10 000 barrers. It is known that the gas permeability of PTMSP decreases with time, but the details are not clear yet. In the present study, the time dependence of the gas permeability of PTMSP was examined by storing the membrane sample under three deferent conditions ; (1) in a sealed polyethylene suck, (2) in air, and (3) in a vacuum drying oven. Consequently the extent of decrease of gas permeability increased in the older of (1)

Published
2013

3. Studies on Time Dependence of the Gas Permeability of Poly(1-trimethylsilyl-1-propyne)

Subjects
Poly(1-trimethylsilyl-1-propyne), Substituted Polyacetylene, Gas Permeability, Time Dependence, Gas Separation Membrane, Oxygen-enriching membrane
Abstract

Poly(1-trimethylsilyl-1-propyne) (PTMSP) is one of the most gas permeable polymers among all the synthetic polymers. Its oxygen permeability coefficient (Po2) reaches up to about 10 000 barrers. It is known that the gas permeability of PTMSP decreases with time, but the details are not clear yet. In the present study, the time dependence of the gas permeability of PTMSP was examined by storing the membrane sample under three deferent conditions ; (1) in a sealed polyethylene suck, (2) in air, and (3) in a vacuum drying oven. Consequently the extent of decrease of gas permeability increased in the older of (1)

Published
2013

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