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@ARTICLE{Sokolowski:856726,
author = {Sokolowski, Marek and Bartsch, Christoph and Spiering,
Vivian J. and Prévost, Sylvain and Appavou, Marie-Sousai
and Schweins, Ralf and Gradzielski, Michael},
title = {{P}reparation of {P}olymer {B}rush {G}rafted {A}nionic or
{C}ationic {S}ilica {N}anoparticles: {S}ystematic
{V}ariation of the {P}olymer {S}hell},
journal = {Macromolecules},
volume = {51},
number = {17},
issn = {1520-5835},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2018-06077},
pages = {6936 - 6948},
year = {2018},
abstract = {Polymer brush grafted anionic SiO2@PMAA (poly(methacrylic
acid)) and cationic SiO2@PDMAEMA
(poly(2-(dimethylamino)ethyl methacrylate))
inorganic/polymer hybrid nanoparticles with different core
radii (dNP = 50–140 nm) and different amounts of attached
polymer were synthesized via surface-initiated atomic
transfer radical polymerization (ATRP). To avoid
irreversible aggregation, a three-step surface modification
had to be employed, thereby keeping the nanoparticles always
dispersed. For SiO2@PMAA the shell thickness changes with
the monomer concentration, while for SiO2@PDMAEMA the
grafting density was changed by monomer concentration and
the shell thickness remained constant. We assume that the
control over the grafting density relies on the nature of
the complexation potential of the PDMAEMA. The structural
characterization of the polymer grafted SiO2-NPs was done in
detail by different scattering methods combined with
thermogravimetric analysis, and details of the brush
characteristics are obtained by small-angle neutron
scattering (SANS). With this approach we were able to
produce silica nanoparticles with anionic and cationic
polymer shells, where the softness of the NPs can be
controlled by the amount of polymer, which are pH-responsive
and colloidally stable over a large pH range.},
cin = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
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},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000444792400040},
doi = {10.1021/acs.macromol.8b01019},
url = {https://juser.fz-juelich.de/record/856726},
}