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Controlled growth of protein resistant PHEMA brushes via S-RAFT polymerization
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SYSNO ASEP 0399476 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Controlled growth of protein resistant PHEMA brushes via S-RAFT polymerization Tvůrce(i) Zamfir, M. (DE)
Rodriguez-Emmenegger, Cesar (UMCH-V) RID
Bauer, S. (DE)
Barner, L. (DE)
Rosenhahn, A. (DE)
Barner-Kowollik, C. (DE)Zdroj.dok. Journal of Materials Chemistry B - ISSN 2050-750X
Roč. 1, č. 44 (2013), s. 6027-6034Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova surface RAFT ; polymer brushes ; antifouling Vědní obor RIV CD - Makromolekulární chemie CEP GAP205/12/1702 GA ČR - Grantová agentura ČR GAP106/12/1451 GA ČR - Grantová agentura ČR Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000326244900003 DOI 10.1039/c3tb20880j Anotace The reversible addition–fragmentation chain transfer polymerization of 2-hydroxyethyl methacrylate (HEMA) from surfaces (S-RAFT) using an R-group-attached chain transfer agent (CTA) is presented. The approach was exploited for the efficient preparation of well-defined PHEMA brushes of up to 50 nm thickness in a controlled fashion without using any cytotoxic catalyst. The chemical composition, morphology and wettability of the samples were assessed by X-ray photoelectron spectroscopy, atomic force microscopy and water contact angle measurements, while the growth kinetics were studied by monitoring the dry thickness via spectroscopic ellipsometry. The mechanism and kinetics of the RAFT polymerization on the surface – in the presence of a sacrificial CTA and of solvent mixtures with different polarities – were investigated. A marked effect of the concentration of the sacrificial CTA on the kinetics was observed. Importantly – and for the first time – the living PHEMA brushes were exploited as macroRAFT agents for chain extension, and thicknesses up to 70 nm were achieved. The prepared PHEMA brushes were challenged with protein solutions demonstrating their resistance to fouling. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2014
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