Gas permeation parameters and other physicochemical properties of a polymer of intrinsic microporosity: Polybenzodioxane PIM-1

被引：442

作者：

Budd, Peter M. ^{[2
]}

McKeown, Neil B. ^{[3
]}

Ghanem, Bader S. ^{[3
]}

Msayib, Kadhum J. ^{[3
]}

Fritsch, Detlev ^{[4
]}

Starannikova, Ludmila ^{[1
]}

Belov, Nikolai ^{[1
]}

Sanfirova, Olga ^{[1
]}

Yampolskii, Yuri ^{[1
]}

Shantarovich, Victor ^{[5
]}

机构：

[1] Russian Acad Sci, AV Topchiev Petrochem Synth Inst, Moscow 119991, Russia

[2] Univ Manchester, Sch Chem, Organ Mat Innovat Ctr, Manchester M13 9PL, Lancs, England

[3] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam, Wales

[4] GKSS Res Ctr Geesthacht GmbH, Polymer Res Inst, D-21502 Geesthacht, Germany

[5] Russian Acad Sci, NN Semenov Chem Phys Inst, Moscow 119991, Russia

来源：

JOURNAL OF MEMBRANE SCIENCE | 2008年 / 325卷 / 02期

关键词：

Gas permeation; Selectivity; Gas sorption; Polybenzodioxane; Free volume;

D O I：

10.1016/j.memsci.2008.09.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A detailed study of gas permeation, thermodynamic properties and free volume was performed for a novel polymer of intrinsic microporosity (PIM-1). Gas permeability was measured using both gas chromatographic and barometric methods. Sorption of vapors was studied by means of inverse gas chromatography (IGC). In addition, positron annihilation lifetime spectroscopy (PALS) was employed for investigation of free volume in this polymer. An unusual property of PIM-1 is a very strong sensitivity of gas permeability and free volume to the film casting protocol. Contact with water in the process of film preparation resulted in relatively low gas permeability (P(O-2) = 120 Barrer), while soaking with methanol led to a strong increase in gas permeability (P(O-2) = 1600 Barrer) with virtually no evidence of fast aging (decrease in permeability) that is typical for highly permeable polymers. For various gas pairs (O-2/N-2, CO2/CH4, CO2/N-2) the data points on the Robeson diagrams are located above the upper bound lines. Hence, a very attractive combination of permeability and selectivity is observed. IGC indicated that this polymer is distinguished by the largest solubility coefficients among all the polymers so far studied. Free volume of PIM-1 includes relatively large microcavities (R = 5 angstrom), and the results of the PALS and IGC methods are in reasonable agreement. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：851 / 860

页数：10

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