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Particle‐beam treatment of organosilicon gas separation membranes: A novel way of controlling their mass transport properties
Author(s) -
Tóth A.,
Khotimsky V. S.,
Bertóti I.,
Marletta G.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960613)60:11<1883::aid-app12>3.0.co;2-2
Subject(s) - organosilicon , membrane , polydimethylsiloxane , particle (ecology) , range (aeronautics) , materials science , penetration (warfare) , chemistry , composite material , polymer chemistry , biochemistry , oceanography , operations research , engineering , geology
Fast atom bombardment applied in the low keV energy range to organosilicon gas separation membranes was found to modify their mass transport properties in a controllable manner. In particular, asymmetric polyvinyltrimethylsilane membranes and polydimethylsiloxane‐based composite ones were treated by particle beams obtained from various gases like Ar, He, H 2 , and NH 3 , with particle energies of about 1 keV and does of about 10 15 particles cm −2 . In each case, improvements in the component selectivities for various gas mixtures coupled with decreases in the component permeances were obtained. The extent of mod‐ification of the mass transport properties increased with increase of the calculated average depth of penetration of the bombarding particles. The modification of the mass transport properties was considered to take place as a result of compaction of the surface layer due to reaction like crosslinking and loss of pendant groups. © 1996 John Wiley & Sons, Inc.