Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-37141
Volltext verfügbar? / Dokumentlieferung
Titel: Temperature-Induced Coloration and Interface Shell Cross-Linking for the Preparation of Polymer-Based Opal Films
VerfasserIn: Schlander, Annika M.-B.
Gallei, Markus
Sprache: Englisch
Titel: ACS applied materials & interfaces
Bandnummer: 11
Heft: 47
Startseite: 44764
Endseite: 44773
Verlag/Plattform: ACS
Erscheinungsjahr: 2019
Freie Schlagwörter: thermal cross-linking
core−shell particles
opals
melt-shear organization
colloidal crystals
polyacrylonitrile
DDC-Sachgruppe: 540 Chemie
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The formation of colloidal crystals and their use as photonic materials are of high interest for various technologies in the field of sensing applications, as templates, absorber materials, catalysts, and membranes. In this study, core-shell particles consisting of a cross-linked poly(methyl methacrylate) core featuring a (polyacrylonitrile-co-styrene) shell are synthesized by starved-feed emulsion polymerization. The resulting particles are investigated with respect to size and monodispersity, as well as the core-to-shell ratio, by means of dynamic light scattering and transmission electron microscopy. Optimized particle sizes are 218 nm for the cores and 276 nm for the core-shell particles. For the formation of highly ordered and free-standing opal films, the particles are processed by the melt-shear organization technique. The resulting films show angle-dependent reflection colors, while reflected colors can be tailored by the design of the core-shell particles. As a focus of this work, polyacrylonitrile as part of the copolymer particle shell is advantageously used both for particle opal film stabilization and for tailoring the reflection colors of the opal films. It is shown that the cyclization reactions at the interface of the particles and within the matrix material significantly influence the optical properties of the opal films upon thermal treatment at 240 °C and for different heat holding times. For instance, the change of color can be simply set from red to blue upon defined thermal treatment conditions. Via this convenient protocol, brilliant reflection colors can thus be obtained based on the insights into the structure-property relationships of the underlying particle architectures and interface reactions. The scalable opal films will pave the way to functional colored materials as interesting candidates for a manifold of sensing applications and temperature-responsive polymeric materials.
DOI der Erstveröffentlichung: 10.1021/acsami.9b17606
URL der Erstveröffentlichung: https://pubs.acs.org/doi/10.1021/acsami.9b17606
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-371413
hdl:20.500.11880/33707
http://dx.doi.org/10.22028/D291-37141
ISSN: 1944-8252
1944-8244
Datum des Eintrags: 2-Sep-2022
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Markus Gallei
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Dateien zu diesem Datensatz:
Es gibt keine Dateien zu dieser Ressource.


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt.