Water and toluene barrier properties of a polyamide 12 modified by a surface treatment using cold plasma |
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Authors: | Frédéric?Dreux Email author" target="_blank">Stéphane?MaraisEmail author Fabienne?Poncin-Epaillard Michel?Metayer Michel?Labbe Jean-Marc?Saiter |
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Affiliation: | 1.UMR 6522, CNRS/Université de Rouen, Laboratoire Polymères, Biopolymères et Membranes, UFR des Sciences, 76821 Mont-Saint-Aignan Cedex, France;2.UMR 6515 Université du Maine Laboratoire Polymères, Collo?des et Interfaces, 72017 Le MANS Cedex, France;3.Laboratoire d'Etude et Caractérisation des Amorphes et des Polymères, Université de Rouen, 76821 Mont-Saint-Aignan cedex, France |
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Abstract: | CF4 and CO2 plasma treatments have been used to modify the barrier properties of a polyamide 12 (PA12) towards permeant molecules, which
present opposing characteristics: water and toluene. The surface modifications were observed by atomic force microscopy, X-ray
photoelectron spectroscopy and surface Gibbs function measurements. Both treatments lead to different surfaces; one is rather
hydrophobic (with CF4) whereas the other is more hydrophilic (with CO2. The effect of this modification on permeametric properties has been investigated by liquid water and liquid toluene permeation
measurements. Our results show opposite effects of the two treatments. CF4 plasma treatment leads to a reduction of water and toluene permeability. With CO2 plasma treatment, in terms of permeation, two different behaviours were observed, an increase and a decrease of permeancy
for water and toluene respectively. These results are in full agreement with those obtained for the surface characterization,
and confirms change in the polymeric surface affinity for the permeant leading to a variation of the materials permeancy. |
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Keywords: | Polyamide 12 Surface Plasma Water Toluene Permeation Barrier properties AFM XPS |
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