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Titel: Self‐Regenerating of Functional Polymer Surfaces by Triggered Layer Shedding Using a Stimulus‐Responsive Poly(urethane)
VerfasserIn: Deng, Zhuoling
Lienkamp, Karen
Sprache: Englisch
Titel: Macromolecular Chemistry and Physics
Bandnummer: 222
Heft: 20
Verlag/Plattform: Wiley
Erscheinungsjahr: 2021
Freie Schlagwörter: coatings
polymer multilayers
polymeric materials
self-regeneration
surface modification
triggered depolymerization
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Regeneration of functional surfaces after damage or contamination could extend the life time of devices. Such regeneration can be achieved by layer shedding (like a lizard shedding its skin). In this work, triggered self-regeneration of functional surfaces by an external stimulus is presented. Polymer multilayer stacks are assembled alternatingly from discrete 20–300 nm thick functional layers and depolymerizable interlayers, which are used as sacrificial layers. The sacrificial layers are depolymerizable poly(benzyl carbamates) end-capped with 4-hydroxy-2-butanone. Their depolymerization is triggered by alkaline pH, at which the end-cap is cleaved. This initiates a 1,6-elimination cascade of the polymer backbone, during which CO2 is released. Thus, the layer shedding is driven synergistically by mass transport and buoyancy forces. Proof-of-concept is achieved using poly(styrene) as a model functional layer, and also studied for hydrophilic, antimicrobially active poly(oxanorbornene) layers. The multilayer assembly and disassembly process is monitored by ellipsometry, Fourier transform infrared spectroscopy (FTIR), optical microscopy, and atomic force microscopy. FTIR spectra taken after degradation are confirmed the regeneration of the surface functionality.
DOI der Erstveröffentlichung: 10.1002/macp.202100127
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-354511
hdl:20.500.11880/32375
http://dx.doi.org/10.22028/D291-35451
ISSN: 1521-3935
1022-1352
Datum des Eintrags: 9-Feb-2022
Bezeichnung des in Beziehung stehenden Objekts: Supporting Information
In Beziehung stehendes Objekt: https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fmacp.202100127&file=macp202100127-sup-0001-SuppMat.pdf
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
Professur: NT - Dr. Karen Lienkamp
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes



Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons