Wrede, Oliver ORCID: 0000-0002-0020-1334, Reimann, Yvonne, Luelsdorf, Stefan, Emmrich, Daniel, Schneider, Kristina, Schmid, Andreas Josef, Zauser, Diana, Hannappel, Yvonne ORCID: 0000-0001-9166-7430, Beyer, Andre ORCID: 0000-0002-9569-0344, Schweins, Ralf, Goelzhaeuser, Armin, Hellweg, Thomas ORCID: 0000-0002-2394-5846 and Sottmann, Thomas (2018). Volume phase transition kinetics of smart N-n-propylacrylamide microgels studied by time-resolved pressure jump small angle neutron scattering. Sci Rep, 8. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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Abstract

The use of smart colloidal microgels for advanced applications critically depends on their response kinetics. We use pressure jump small angle neutron scattering with supreme time resolution to study the rapid volume phase transition kinetics of such microgels. Utilizing the pressure induced microphase separation inside the microgels we were able to resolve their collapse and swelling kinetics. While the collapse occurs on a time scale of 10 ms, the particle swelling turned out to be much faster. Photon correlation spectroscopy and static small angle neutron scattering unambiguously show, that the much slower collapse can be associated with the complex particle architecture exhibiting a loosely-crosslinked outer region and a denser inner core region. These insights into the kinetics of stimuli-responsive materials are of high relevance for their applications as nano-actuators, sensors or drug carriers. Moreover, the used refined pressure jump small angle neutron scattering technique is of broad interest for soft matter studies.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Wrede, OliverUNSPECIFIEDorcid.org/0000-0002-0020-1334UNSPECIFIED
Reimann, YvonneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luelsdorf, StefanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Emmrich, DanielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, KristinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmid, Andreas JosefUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zauser, DianaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hannappel, YvonneUNSPECIFIEDorcid.org/0000-0001-9166-7430UNSPECIFIED
Beyer, AndreUNSPECIFIEDorcid.org/0000-0002-9569-0344UNSPECIFIED
Schweins, RalfUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goelzhaeuser, ArminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hellweg, ThomasUNSPECIFIEDorcid.org/0000-0002-2394-5846UNSPECIFIED
Sottmann, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-172973
DOI: 10.1038/s41598-018-31976-4
Journal or Publication Title: Sci Rep
Volume: 8
Date: 2018
Publisher: NATURE PUBLISHING GROUP
Place of Publication: LONDON
ISSN: 2045-2322
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
LIGHT-SCATTERING; STRUCTURAL-CHANGES; TEMPERATURE; PH; PARTICLES; POLYDISPERSITY; COATINGS; BEHAVIOR; RELEASE; SYSTEMSMultiple languages
Multidisciplinary SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/17297

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