Effect of supercritical carbon dioxide on nanoporous polyhexafluoropropylene
- Authors: Shantarovich V.P.1, Bekeshev V.G.1, Belov N.A.2, Ronova I.A.3, Nikolaev A.Y.3, Gustov V.W.1, Kevdina I.B.1, Filimonov M.K.1
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Affiliations:
- Semenov Institute of Chemical Physics
- Topchiev Institute of Petrochemical Synthesis
- Nesmeyanov Institute of Organoelement Compounds
- Issue: Vol 50, No 4 (2016)
- Pages: 287-291
- Section: Nanostructured Systems and Materials
- URL: https://journal-vniispk.ru/0018-1439/article/view/157004
- DOI: https://doi.org/10.1134/S0018143916040160
- ID: 157004
Cite item
Abstract
The effect of supercritical CO2 (sc-CO2) on the size distribution of free volume holes (nanopores) in a polyhexafluoropropylene (PHFP) polymer matrix has been studied. Residual (after CO2 release) swelling improves gas transport properties of the material. Relaxation of these properties over time has been compared with changes in permeability and nanoporosity. For PHFP samples with different histories, the data on nanoporosity have been obtained using positron annihilation lifetime spectroscopy (micropores) and the lowtemperature gas sorption technique (mesopores and part of micropores). Matching of the data is intended to reveal the role of pores of different sizes in permeability of membrane materials to different gases and determine the specifics of application of the positron annihilation technique to studying sc-CO2-modified objects.
About the authors
V. P. Shantarovich
Semenov Institute of Chemical Physics
Author for correspondence.
Email: shant@center.chph.ras.ru
Russian Federation, ul. Kosygina 4, Moscow, 119991
V. G. Bekeshev
Semenov Institute of Chemical Physics
Email: shant@center.chph.ras.ru
Russian Federation, ul. Kosygina 4, Moscow, 119991
N. A. Belov
Topchiev Institute of Petrochemical Synthesis
Email: shant@center.chph.ras.ru
Russian Federation, Leninskii pr. 29, Moscow, 119991
I. A. Ronova
Nesmeyanov Institute of Organoelement Compounds
Email: shant@center.chph.ras.ru
Russian Federation, ul. Vavilova 28, Moscow, 119334
A. Yu. Nikolaev
Nesmeyanov Institute of Organoelement Compounds
Email: shant@center.chph.ras.ru
Russian Federation, ul. Vavilova 28, Moscow, 119334
V. W. Gustov
Semenov Institute of Chemical Physics
Email: shant@center.chph.ras.ru
Russian Federation, ul. Kosygina 4, Moscow, 119991
I. B. Kevdina
Semenov Institute of Chemical Physics
Email: shant@center.chph.ras.ru
Russian Federation, ul. Kosygina 4, Moscow, 119991
M. K. Filimonov
Semenov Institute of Chemical Physics
Email: shant@center.chph.ras.ru
Russian Federation, ul. Kosygina 4, Moscow, 119991
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