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@ARTICLE{Helminger:155901,
author = {Helminger, Maria and Wu, Baohu and Kollmann, Tina and
Benke, Dominik and Schwahn, Dietmar and Pipich, Vitaliy and
Faivre, Damien and Zahn, Dirk and Cölfen, Helmut},
title = {{S}ynthesis and {C}haracterization of {G}elatin-{B}ased
{M}agnetic {H}ydrogels},
journal = {Advanced functional materials},
volume = {24},
number = {21},
issn = {1616-301X},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2014-04835},
pages = {3187 - 3196},
year = {2014},
abstract = {A simple preparation of thermoreversible gelatin-based
ferrogels in water provides a constant structure defined by
the crosslinking degree for gelatin contents between 6 and
18 $wt\%.$ The possibility of varying magnetite nanoparticle
concentration between 20 and 70 $wt\%$ is also reported.
Simulation studies hint at the suitability of collagen to
bind iron and hydroxide ions, suggesting that collagen acts
as a nucleation seed to iron hydroxide aggregation, and thus
the intergrowth of collagen and magnetite nanoparticles
already at the precursor stage. The detailed structure of
the individual ferrogel components is characterized by
small-angle neutron scattering (SANS) using contrast
matching. The magnetite structure characterization is
supplemented by small-angle X-ray scattering and microscopy
only visualizing magnetite. SANS shows an unchanged gelatin
structure of average mesh size larger than the nanoparticles
with respect to gel concentration while the magnetite
nanoparticles size of around 10 nm seems to be limited by
the gel mesh size. Swelling measurements underline that
magnetite acts as additional crosslinker and therefore
varying the magnetic and mechanical properties of the
ferrogels. Overall, the simple and variable synthesis
protocol, the cheap and easy accessibility of the components
as well as the biocompatibility of the gelatin-based
materials suggest them for a number of applications
including actuators.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
Jülich Centre for Neutron Science JCNS (München) ;
JCNS-FRM-II},
ddc = {620},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - ANKA
(POF2-54G11)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G11},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000337489400014},
doi = {10.1002/adfm.201303547},
url = {https://juser.fz-juelich.de/record/155901},
}