A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content

Judith Witte; Tetyana Kyrey; Jana Lutzki; Anna Margarethe Dahl; Judith Houston; Aurel Radulescu; Vitaliy Pipich; Laura Stingaciu; Matthias Kühnhammer; Marcus U. Witt; Regine Von Klitzing; Olaf Holderer; Stefan Wellert

doi:10.1039/c8sm02141d

A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content

Judith Witte, Tetyana Kyrey, Jana Lutzki, Anna Margarethe Dahl, Judith Houston, Aurel Radulescu, Vitaliy Pipich, Laura Stingaciu, Matthias Kühnhammer, Marcus U. Witt, Regine Von Klitzing, Olaf Holderer, Stefan Wellert

SANS & Spin Echo

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Poly(N-isopropylacrylamide) microgel particles were prepared via a "classical" surfactant-free precipitation polymerization and a continuous monomer feeding approach. It is anticipated that this yields microgel particles with different internal structures, namely a dense core with a fluffy shell for the classical approach and a more even crosslink distribution in the case of the continuous monomer feeding approach. A thorough structural investigation of the resulting microgels with dynamic light scattering, atomic force microscopy and small angle neutron scattering was conducted and related to neutron spin echo spectroscopy data. In this way a link between structural and dynamic features of the internal polymer network was made.

Original language	English
Pages (from-to)	1053-1064
Number of pages	12
Journal	Soft Matter
Volume	15
Issue number	5
DOIs	https://doi.org/10.1039/c8sm02141d
State	Published - 2019

Funding

The D2O used in the NSE experiments was supplied by the United States Department of Energy Office of Science by Isotope Program in the Office of Nuclear Physics. This work is based upon experiments performed at the KWS-2 and KWS-3 operated by JCNS at Heinz Maier-Leibnitz Zentrum (MLZ), Garching, Germany. We also thank Malcolm Cochran for technical support during the beam time at SNS-NSE and Piotr A. Zolnierczuk for support with NSE data analysis. S. W. and O. H. gratefully acknowledge the financial support by Deutsche Forschungsge-meinschaft DFG (grant number WE5066/3-1 (S. Wellert) and HO 5488/2-1 (O. Holderer)).

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Witte, J., Kyrey, T., Lutzki, J., Dahl, A. M., Houston, J., Radulescu, A., Pipich, V., Stingaciu, L., Kühnhammer, M., Witt, M. U., Von Klitzing, R., Holderer, O., & Wellert, S. (2019). A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content. Soft Matter, 15(5), 1053-1064. https://doi.org/10.1039/c8sm02141d

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title = "A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content",

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author = "Judith Witte and Tetyana Kyrey and Jana Lutzki and Dahl, {Anna Margarethe} and Judith Houston and Aurel Radulescu and Vitaliy Pipich and Laura Stingaciu and Matthias K{\"u}hnhammer and Witt, {Marcus U.} and {Von Klitzing}, Regine and Olaf Holderer and Stefan Wellert",

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Witte, J, Kyrey, T, Lutzki, J, Dahl, AM, Houston, J, Radulescu, A, Pipich, V, Stingaciu, L, Kühnhammer, M, Witt, MU, Von Klitzing, R, Holderer, O & Wellert, S 2019, 'A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content', Soft Matter, vol. 15, no. 5, pp. 1053-1064. https://doi.org/10.1039/c8sm02141d

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AU - Witte, Judith

AU - Kyrey, Tetyana

AU - Lutzki, Jana

AU - Dahl, Anna Margarethe

AU - Houston, Judith

AU - Radulescu, Aurel

AU - Pipich, Vitaliy

AU - Stingaciu, Laura

AU - Kühnhammer, Matthias

AU - Witt, Marcus U.

AU - Von Klitzing, Regine

AU - Holderer, Olaf

AU - Wellert, Stefan

PY - 2019

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JO - Soft Matter

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A comparison of the network structure and inner dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels with high crosslinker content

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