TU Darmstadt / ULB / TUbiblio

Surface-Initiated Anionic Polymerization of [1]Silaferrocenophanes for the Preparation of Colloidal Preceramic Materials

Elbert, Johannes and Didzoleit, Haiko and Fasel, Claudia and Ionescu, Emanuel and Riedel, Ralf and Stühn, B. and Gallei, Markus (2015):
Surface-Initiated Anionic Polymerization of [1]Silaferrocenophanes for the Preparation of Colloidal Preceramic Materials.
In: Macromolecular Rapid Communications, WILEY-VCH Verlag GmbH & Co. KGaA, pp. 597-603, 36, (7), ISSN 10221336,
[Online-Edition: http://dx.doi.org/10.1002/marc.201400581],
[Article]

Abstract

A novel strategy for the preparation of poly(ferrocenylsilane) (PFS) immobilized on the surface of cross-linked polystyrene (PS) nanoparticles is reported. The ferrocene-containing core/shell architectures are shown to be excellent candidates as preceramic polymers yielding spherical ceramic materials consisting of iron silicide (Fe3Si) and metallic iron after thermal treatment. For this purpose, dimethyl- and hydromethyl[1]silaferrocenophane monomers are polymerized by surface-initiated ring-opening polymerization upon taking advantage of residual vinylic moieties at the PS particle surface. A strategy for selective chain growth from the particle surface is developed without the formation of free PFS homopolymer in solution. The grafted particles are characterized using transmission electron microscopy (TEM) and dynamic light scattering (DLS). These particles are excellent precursors for ceramics as studied by thermogravimetric analysis (TGA). The composition of the ceramics is studied using X-ray diffraction (XRD) measurements, while the morphology is probed by scanning electron microscopy (SEM) revealing the original spherical shape of the precursor particles. Obtained ceramic materials— predominantly based on iron silicides—show ferromagnetic behavior as investigated by superconducting quantum interference device (SQUID) magnetization measurements at different temperatures.

Item Type: Article
Erschienen: 2015
Creators: Elbert, Johannes and Didzoleit, Haiko and Fasel, Claudia and Ionescu, Emanuel and Riedel, Ralf and Stühn, B. and Gallei, Markus
Title: Surface-Initiated Anionic Polymerization of [1]Silaferrocenophanes for the Preparation of Colloidal Preceramic Materials
Language: English
Abstract:

A novel strategy for the preparation of poly(ferrocenylsilane) (PFS) immobilized on the surface of cross-linked polystyrene (PS) nanoparticles is reported. The ferrocene-containing core/shell architectures are shown to be excellent candidates as preceramic polymers yielding spherical ceramic materials consisting of iron silicide (Fe3Si) and metallic iron after thermal treatment. For this purpose, dimethyl- and hydromethyl[1]silaferrocenophane monomers are polymerized by surface-initiated ring-opening polymerization upon taking advantage of residual vinylic moieties at the PS particle surface. A strategy for selective chain growth from the particle surface is developed without the formation of free PFS homopolymer in solution. The grafted particles are characterized using transmission electron microscopy (TEM) and dynamic light scattering (DLS). These particles are excellent precursors for ceramics as studied by thermogravimetric analysis (TGA). The composition of the ceramics is studied using X-ray diffraction (XRD) measurements, while the morphology is probed by scanning electron microscopy (SEM) revealing the original spherical shape of the precursor particles. Obtained ceramic materials— predominantly based on iron silicides—show ferromagnetic behavior as investigated by superconducting quantum interference device (SQUID) magnetization measurements at different temperatures.

Journal or Publication Title: Macromolecular Rapid Communications
Volume: 36
Number: 7
Publisher: WILEY-VCH Verlag GmbH & Co. KGaA
Uncontrolled Keywords: anionic polymerizations, ceramic precursors, colloids, metallopolymers, stimuli-responsive polymers
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 09 Apr 2015 10:27
Official URL: http://dx.doi.org/10.1002/marc.201400581
Identification Number: doi:10.1002/marc.201400581
Funders: The authors acknowledge the Lande­soffensive zur Entwicklung Wissenschaftlich-Ökonomischer Exzellenz (LOEWE) of the State of Hesse through research initiative Soft Control for ongoing financial support.
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item