pH Responsive Surfaces with Nanoscale Topography
GARAY, Maria Teresa
Fac Ciencia & Tecnol, Dpto Quim Fis [Labquimac]
Laboratoire de Chimie des Polymères Organiques [LCPO]
Fac Ciencia & Tecnol, Dpto Quim Fis [Labquimac]
Laboratoire de Chimie des Polymères Organiques [LCPO]
PAPON, Eric
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
RODRIGUEZ-HERNANDEZ, Juan
CSIC, Inst Ciencia & Tecnol Polimeros
Laboratoire de Chimie des Polymères Organiques [LCPO]
< Réduire
CSIC, Inst Ciencia & Tecnol Polimeros
Laboratoire de Chimie des Polymères Organiques [LCPO]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Polymer Science Part A: Polymer Chemistry. 2010, vol. 48, n° 14, p. 2982-2990
Wiley
Résumé en anglais
We report the preparation of nanostructurecl adaptive polymer surfaces by diffusion of an amphihilic block copolymer toward the interface. The surface segregation of a diblock copolymer, polystyrene-block-poly(acrylic acid) ...Lire la suite >
We report the preparation of nanostructurecl adaptive polymer surfaces by diffusion of an amphihilic block copolymer toward the interface. The surface segregation of a diblock copolymer, polystyrene-block-poly(acrylic acid) (PS-b-PAA), occurred when blended with high molecular weight polystyrene employed as a matrix. On annealing, the polymer surfaces changed both the chemical composition and the hydrophilicity depending on the environment and pH, respectively. By exposure to either water vapor or air, the surface wettability varied between hydrophilic and hydrophobic. In addition, surface enrichment on diblock copolymer by water vapor annealing led to self-assembly occurring at the interface. Hence, nanostructured domains can be observed by AFM in liquid media. Moreover, the PAA segments placed at the interface respond to pH and can switch from an extended hydrophilic state at basic pH values to a collapsed hydrophobic state in acidic media. Accordingly, the surface morphology changed from swelled micelles to nanometer size holes< Réduire
Mots clés en anglais
topography
surface segregation
surfaces
block copolymers
polymer surfaces
self-assembly
stimuli-responsive
Origine
Importé de halUnités de recherche