Journal Article

FZJ-2020-01262

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tailoring the Cavity of Hollow Polyelectrolyte Microgels

Wypysek, S. K. ; Scotti, A. (Corresponding author) ; Alziyadi, M. O. ; Potemkin, G.FZJ* ; Denton, A. R. ; Richtering, W. (Corresponding author)Extern*

2020
Wiley-VCH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/24660  doi:10.1002/marc.201900422

Abstract: 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.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. International Helmholtz Research School of Biophysics and Soft Matter (IHRS-BioSoft)
2. Theorie der Weichen Materie und Biophysik (ICS-2)
3. JCNS-FRM-II (JCNS-FRM-II)
4. Heinz Maier-Leibnitz Zentrum (MLZ)
5. Elektronische Materialien (PGI-7)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)
2. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
3. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
4. IHRS-BioSoft - International Helmholtz Research School of Biophysics and Soft Matter (IHRS-BioSoft-20061101) (IHRS-BioSoft-20061101)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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