Tailoring the Cavity of Hollow Polyelectrolyte Microgels.
Poisson-Boltzmann
computer simulations
microgels
polyelectrolytes
scattering
Journal
Macromolecular rapid communications
ISSN: 1521-3927
Titre abrégé: Macromol Rapid Commun
Pays: Germany
ID NLM: 9888239
Informations de publication
Date de publication:
Jan 2020
Jan 2020
Historique:
received:
15
08
2019
revised:
12
10
2019
pubmed:
19
11
2019
medline:
30
5
2020
entrez:
19
11
2019
Statut:
ppublish
Résumé
The authors demonstrate how the size and structure of the cavity of hollow charged microgels may be controlled by varying pH and ionic strength. Hollow charged microgels based on N-isopropylacrylamide with ionizable co-monomers (itaconic acid) combine advanced structure with enhanced responsiveness to external stimuli. Structural advantages accrue from the increased surface area provided by the extra internal surface. Extreme sensitivity to pH and ionic strength due to ionizable moieties in the polymer network differentiates these soft colloidal particles from their uncharged counterparts, which sustain a hollow structure only at cross-link densities sufficiently high that stimuli sensitivity is reduced. Using small-angle neutron and light scattering, increased swelling of the network in the charged state accompanied by an expanded internal cavity is observed. Upon addition of salt, the external fuzziness of the microgel surface diminishes while the internal fuzziness grows. These structural changes are interpreted via Poisson-Boltzmann theory in the cell model.
Identifiants
pubmed: 31736176
doi: 10.1002/marc.201900422
doi:
Substances chimiques
Acrylamides
0
Microgels
0
Polyelectrolytes
0
N-isopropylacrylamide
B7GFF17L9U
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1900422Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : SFB 985
Informations de copyright
© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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