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@ARTICLE{Smith:903633,
author = {Smith, Gregory N. and Brok, Erik and Schmiele, Martin and
Mortensen, Kell and Bouwman, Wim G. and Duif, Chris P. and
Hassenkam, Tue and Alm, Martin and Thomsen, Peter and
Arleth, Lise},
title = {{T}he microscopic distribution of hydrophilic polymers in
interpenetrating polymer networks ({IPN}s) of medical grade
silicone},
journal = {Polymer},
volume = {224},
issn = {0032-3861},
address = {Oxford},
publisher = {Elsevier Science},
reportid = {FZJ-2021-05282},
pages = {123671 -},
year = {2021},
abstract = {By introducing hydrophilic polymers into silicone medical
devices, highly beneficial biomedical properties can be
realized. An established solution to introduce hydrophilic
polymers is to form an interpenetrating polymer network
(IPN) by performing the hydrogel synthesis in the presence
of silicone swollen in supercritical carbon dioxide. The
precise distribution of the two polymers is not known, and
determining this is the goal of this study. Neutron
scattering and microscopy were used to determine the
distribution of the hydrophilic guest polymer. Atomic force
microscopy revealed that the important length scale on the
surface of these materials is 10–100 nm, and spin-echo
small-angle neutron scattering (SESANS) on IPNs submerged in
D2O revealed structures of the same scale within the
interior and enabled quantification of their size. SESANS
with hydration by D2O proved to be the only scattering
technique that could determine the structure of the bulk of
these types of materials, and it should be used as an
important tool for characterizing polymer medical devices.},
cin = {JCNS-FRM-II / JCNS-4 / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-4-20201012 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4)},
pid = {G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000646249600004},
doi = {10.1016/j.polymer.2021.123671},
url = {https://juser.fz-juelich.de/record/903633},
}