Artículo
Impact of thermal annealing on wettability and antifouling characteristics of alginate poly-l-lysine polyelectrolyte multilayer films
Diamanti Kandarakis, Evanthia; Muzzio, Nicolás Eduardo
; Gregurec, Danijela; Irigoyen, Joseba; Pasquale, Miguel Angel
; Azzaroni, Omar
; Brinkmann, Martin; Moya, Sergio Enrique
Fecha de publicación:
09/2016
Editorial:
Elsevier Science
Revista:
Colloids and Surfaces B: Biointerfaces
ISSN:
0927-7765
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Polyelectrolyte multilayers (PEMs) of poly- l-lysine (PLL) and alginic acid sodium salt (Alg) are fabricated applying the layer by layer technique and annealed at a constant temperature; 37, 50 and 80 °C, for 72 h. Atomic force microscopy reveals changes in the topography of the PEM, which is changing from a fibrillar to a smooth surface. Advancing contact angle in water varies from 36° before annealing to 93°, 77° and 95° after annealing at 37, 50 and 80 °C, respectively. Surface energy changes after annealing were calculated from contact angle measurements performed with organic solvents. Quartz crystal microbalance with dissipation, contact angle and fluorescence spectroscopy measurements show a significant decrease in the adsorption of the bovine serum albumin protein to the PEMs after annealing. Changes in the physical properties of the PEMs are interpreted as a result of the reorganization of the polyelectrolytes in the PEMs from a layered structure into complexes where the interaction of polycations and polyanions is enhanced. This work proposes a simple method to endow bio-PEMs with antifouling characteristics and tune their wettability.
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Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Diamanti Kandarakis, Evanthia; Muzzio, Nicolás Eduardo; Gregurec, Danijela; Irigoyen, Joseba; Pasquale, Miguel Angel; et al.; Impact of thermal annealing on wettability and antifouling characteristics of alginate poly-l-lysine polyelectrolyte multilayer films; Elsevier Science; Colloids and Surfaces B: Biointerfaces; 145; 9-2016; 328-337
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