Nanoscale domain evolution and solvent distribution during water vapor uptake by compositionally variant and bioinert polymer brush mixtures
By utilizing grazing incidence neutron scattering (GISANS), we aim at probing how polymer chain topology, expressed in graft copolymers vs. molecularly mixed homopolymers, affects D2O swelling kinetics and nanostructural hydration from Poly(ethylene glycol) (abbreviated as PEG) and Poly(2-alkyl-2-oxazoline) (abbreviated as PAOXA) protonated brushes grafted on silicon substrates. Our interest lies in quantifying how molecular mixing between PEG and PAOXA brushes affects nanoscale hydration at a single grafting density. The results can have profound impact on the optimization of such brush layers as nanotribological scaffolds. High contrast will be achieved by using heavy water (D2O) as contrast agent for these protonated polymer brushes. The lateral resolution of D22 instrument at ILL allows to probe the lateral D2O solvent localization in these polymer brushes of variable topology.
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Vagias, Apostolos; BENETTI Edmondo Maria; Christina Geiger; GUTFREUND Philipp; MUELLER BUSCHBAUM Peter; REITENBACH Julija and WANG Peixi. (2021). Nanoscale domain evolution and solvent distribution during water vapor uptake by compositionally variant and bioinert polymer brush mixtures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-2057
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