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RESEARCH PRODUCT
On the formation of inclusion complexes at the solid/liquid interface of anchored temperature-responsive PNIPAAM diblock copolymers with γ-cyclodextrin
Karin SchillénGiuseppe LazzaraKaizheng ZhuBo NyströmTommy NylanderRichard A. CampbellSolmaz BayatiSolmaz Bayatisubject
AmidePolymers and PlasticsBlock copolymerReflectometerReflection02 engineering and technology01 natural sciencessupramolecular chemistryquartz crystal microbalancechemistry.chemical_compoundColloid and Surface ChemistryEllipsometryViscoelasticity Inclusion complexCopolymerMaterials ChemistryPoly (n isopropylacrylamide)Poly(N-isopropylacrylamide)Settore CHIM/02 - Chimica Fisicachemistry.chemical_classification/dk/atira/pure/subjectarea/asjc/1600/1606Reflectometry/dk/atira/pure/subjectarea/asjc/1500/1505Cyclodextrinunclassified drug Article021001 nanoscience & nanotechnologyThermoresponsive block copolymerpriority journalsolidpolymerizationPoly(N-isopropylacrylamide)synthesiNeutron reflectometrypolyrotaxane0210 nano-technologyellipsometryMaterials science/dk/atira/pure/subjectarea/asjc/2500/2505/dk/atira/pure/subjectarea/asjc/2500/2507poly(n isopropylacrylamide)010402 general chemistryLower critical solution temperatureAcrylic monomeratom transfer radical polymerizationAdsorptioncomplex formationPolymer chemistryCyclodextrinliquidPhysical and Theoretical ChemistrySolid/liquid interfaceThermo-responsive Hydrogels copolymerneutron reflectometryInclusion complexgamma cyclodextrinCationic polymerization0104 chemical sciencessolid liquid interfacechemistryChemical engineeringInvited Articledescription
The thermal responsive behavior of adsorbed layers of diblock copolymers of poly(N-isopropylacrylamide) (PNIPAAM) and poly((3-acrylamidopropyl)trimethylammonium chloride) (PAMPTMA(+)) with γ-cyclodextrin (γ-CD) at the solid/liquid interface has been investigated using three in situ techniques: null ellipsometry, quartz–crystal microbalance with dissipation monitoring, and neutron reflectometry. The measurements provided information about the adsorbed amounts, the layer thickness, hydration and viscoelastic properties, and the interfacial structure and composition. The copolymers adsorb to silica with the cationic PAMPTMA(+) blocks sitting as anchors in a flat conformation and the PNIPAAM chains extending into the solution. The copolymer system alone exhibits reversible collapse above the lower critical solution temperature of PNIPAAM. The addition of γ-CD to pre-adsorbed copolymer layers results in a highly extended conformation as well as some loss of copolymer from the surface, which we discuss in terms of the formation of surface-invoked lateral steric repulsion of formed inclusion complexes. © 2017, The Author(s).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Colloid and Polymer Science |