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@ARTICLE{Pipich:874563,
author = {Pipich, Vitaliy and Dickmann, Marcel and Frielinghaus,
Henrich and Kasher, Roni and Hugenschmidt, Christoph and
Petry, Winfried and Oren, Yoram and Schwahn, Dietmar},
title = {{M}orphology of {T}hin {F}ilm {C}omposite {M}embranes
{E}xplored by {S}mall-{A}ngle {N}eutron {S}cattering and
{P}ositron-{A}nnihilation {L}ifetime {S}pectroscopy},
journal = {Membranes},
volume = {10},
number = {3},
issn = {2077-0375},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2020-01513},
pages = {48 -},
year = {2020},
abstract = {The morphology of thin film composite (TFC) membranes used
in reverse osmosis (RO) and nanofiltration (NF) water
treatment was explored with small-angle neutron scattering
(SANS) and positron-annihilation lifetime spectroscopy
(PALS). The combination of both methods allowed the
characterization of the bulk porous structure from a few Å
to µm in radius. PALS shows pores of 4.5 Å average radius
in a surface layer of about 4 m thickness, which become
$40\%$ smaller at the free surface of the membranes. This
observation may correlate with the glass state of the
involved polymer. Pores of similar size appear in SANS as
closely packed pores of 6 Å radius distributed with an
average distance of 30 Å. The main effort of SANS was the
characterization of the morphology of the porous polysulfone
support layer as well as the fibers of the nonwoven fabric
layer. Contrast variation using the media H2O/D2O and
supercritical CO2 and CD4 identified the polymers of the
support layers as well as internal heterogeneities.},
cin = {JCNS-FRM-II / JCNS-1 / MLZ},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS3-20140101 /
EXP:(DE-MLZ)NEPOMUC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32197524},
UT = {WOS:000524297400011},
doi = {10.3390/membranes10030048},
url = {https://juser.fz-juelich.de/record/874563},
}