Universität zu Köln

Seifert, Julian, Guenzing, Damian, Webers, Samira ORCID: 0000-0002-5602-5018, Dulle, Martin ORCID: 0000-0001-5699-7530, Kruteva, Margarita ORCID: 0000-0002-7686-0934, Landers, Joachim, Wende, Heiko ORCID: 0000-0001-8395-3541 and Schmidt, Annette M. (2021). Strain- and field-induced anisotropy in hybrid elastomers with elongated filler nanoparticles. Soft Matter, 17 (32). S. 7565 - 7585. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1744-6848

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Abstract

The implementation of anisotropy to functional materials is a key step towards future smart materials. In this work, we evaluate the influence of preorientation and sample architecture on the strain-induced anisotropy in hybrid elastomers containing covalently attached elongated magnetic filler particles. Accordingly, silica coated spindle-type hematite nanoparticles are incorporated into poly(dimethylsiloxane)-based elastomers, and two types of composite architectures are compared: on the one hand a conventional architecture of filled, covalently crosslinked elastomers, and on the other hybrid elastomers that are crosslinked exclusively by covalent attachment of the polymer chains to the particle surface. By the application of external strain and with magnetic fields, the orientational order of the elongated nanoparticles can be manipulated, and we investigate the interplay between strain, magnetic order, and orientational order of the particles by combining 2D small angle X-ray scattering experiments under strain and fields with Mossbauer spectroscopy under similar conditions, and supplementary angular-dependent magnetization experiments. The converging information is used to quantify the order in these interesting materials, while establishing a direct link between the magnetic properties and the spatial orientation of the embedded magnetic nanoparticles.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Seifert, Julian UNSPECIFIED UNSPECIFIED UNSPECIFIED Guenzing, Damian UNSPECIFIED UNSPECIFIED UNSPECIFIED Webers, Samira UNSPECIFIED orcid.org/0000-0002-5602-5018 UNSPECIFIED Dulle, Martin UNSPECIFIED orcid.org/0000-0001-5699-7530 UNSPECIFIED Kruteva, Margarita UNSPECIFIED orcid.org/0000-0002-7686-0934 UNSPECIFIED Landers, Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Wende, Heiko UNSPECIFIED orcid.org/0000-0001-8395-3541 UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-581440
DOI:	10.1039/d0sm02104k
Journal or Publication Title:	Soft Matter
Volume:	17
Number:	32
Page Range:	S. 7565 - 7585
Date:	2021
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1744-6848
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MOLECULAR-ORIENTATION; HEMATITE PARTICLES; COBALT FERRITE; SILICA; SCATTERING; HYDROGELS; MICROGELS; SIZE Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58144