Universität zu Köln

Koch, Karin, Geller, Sven, Acar, Kubilay, Bach, Patricia, Tsarenko, Ekaterina and Schmidt, Annette ORCID: 0000-0002-7284-7847 (2020). Creation of a PDMS Polymer Brush on SiO2-Based Nanoparticles by Surface-Initiated Ring-Opening Polymerization. Polymers, 12 (4). BASEL: MDPI. ISSN 2073-4360

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Abstract

The incorporation of nanoparticles into soft matrices opens a broad spectrum of novel property combinations. However, one of the major challenges for these systems remains the compatibilization of particles with the surrounding matrix by proper surface functionalization. For silicon-based systems or liquid crystalline phases, polydimethylsiloxane (PDMS) brushes at the surface of particles increase the stability against particle agglomeration in such systems. Here, we report a novel approach for the functionalization of particles with a polysiloxane brush by surface-initiated ring-opening polymerization of a cyclosiloxane. For this purpose, surface hydroxy groups of silica and silica-coated hematite particles are used as initiators in combination with phosphazene bases as catalysts. The ring-chain equilibrium of a model-based solution polymerization is investigated in detail to find the appropriate reaction parameters. The corresponding molar masses are determined and compared by H-1-NMR and SEC measurements to confirm the underlying mechanism. In the resulting hybrid nanostructures, a covalently bound PDMS fraction is achieved up to 47 mass %.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Koch, Karin UNSPECIFIED UNSPECIFIED UNSPECIFIED Geller, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Acar, Kubilay UNSPECIFIED UNSPECIFIED UNSPECIFIED Bach, Patricia UNSPECIFIED UNSPECIFIED UNSPECIFIED Tsarenko, Ekaterina UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Annette UNSPECIFIED orcid.org/0000-0002-7284-7847 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-338287
DOI:	10.3390/polym12040787
Journal or Publication Title:	Polymers
Volume:	12
Number:	4
Date:	2020
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2073-4360
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSFER RADICAL POLYMERIZATION; CATIONIC-POLYMERIZATION; EPSILON-CAPROLACTONE; COBALT FERRITE; SILICA SPHERES; L-LACTIDE; POLY(DIMETHYLSILOXANE); KINETICS; POLYDIMETHYLSILOXANE; CYCLOTRISILOXANES Multiple languages Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33828