Graphene oxide was used as charge able to confer high selectivity to the final product. A self-assembling technique, namely layer-by-layer has been developed to stratify graphene-based coating on polymeric films; this coating is composed by nanolayers of graphene oxide alternated with polymers, bonded each other by electrostatic forces. Permeability measurement on layered Matrimid®, a commercial polyimide, showed incredibly high selectivity values to small particle mixtures, as O2, CO2, He and H2. Through simple post-treatments the selective performance was also improved, as demonstration of potentiality of the well-ordered bi-dimensional system: improvement on the coating would make this material one of the viable solution for industrial separations, e.g. hydrogen purification in sustainable energy production. A further investigation on similar structures obtained by other strategies shall demonstrate the peculiar mechanism occurring in this material for high selective performance.

1.
J. S.
Bunch
 et al,
Nano Letters
8
,
2458
2462
(
2008
).
2.
O.
Leenaerts
 et al,
Applied Physics Letters
93
,
3
(
2008
).
3.
R.
Joshi
 et al,
Science
343
,
752
754
(
2014
).
4.
Y. H.
Yang
 et al,
Advanced Materials
25
,
503
508
(
2013
).
5.
L. E.
Nielsen
,
Journal of Macromolecular Science—Chemistry
1
,
929
942
(
1967
).
6.
L.
Ansaloni
 et al,
Oil & Gas Science and Technology-Revue D Ifp Energies Nouvelles
70
,
367
379
, (
2015
).
7.
W.
Chen
and
T. J.
McCarthy
,
Macromolecules
30
,
78
86
(
1997
).
8.
M.
Elzbieciak
 et al,
Langmuir
25
,
3255
3259
(
2009
).
9.
D.
Pierleoni
 et al,
Carbon
96
,
503
512
(
2016
).
10.
G.
Ladam
 et al,
Langmuir
16
,
1249
1255
(
2000
).
11.
L. M.
Robeson
,
Journal of Membrane Science
320
,
390
400
(
2008
).
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