Fabrication of polyelectrolyte multilayer films comprising nanoblended layers.
Polyelectrolyte multilayer thin films were prepared via the alternate deposition of poly(allylamine hydrochloride) (PAH) and a blend of poly(acrylic acid) (PAA) and poly(styrenesulfonate) (PSS). When the pH of the blend solution was 3.5, the presence of PAA in this solution significantly increased the total film thickness. With only 10 wt % PAA in the blend adsorption solution, a large increase in film thickness was observed (92 nm cf. 18 nm). It was also demonstrated that the total amount of PSS adsorbed was enhanced by the presence of PAA in the blend solution, showing that the blend solution composition influenced that of the multilayer films. Thin films prepared with nanoblended layers also showed improved pH stability, because they exhibited reduced film rearrangement upon exposure to acidic conditions (pH = 2.5).
Centre for Nanoscience and Nanotechnology, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia.
Jinhan
J
Cho
John F
JF
Quinn
Frank
F
Caruso
D000180:Acrylic Resins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D036103:Nanotechnology / Q000379:methods*; D011073:Polyamines / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
D000180:Acrylic Resins; D011073:Polyamines; D011137:Polystyrenes; C063994:polyallylamine; C006903:carbopol 940; C003321:polystyrene sulfonic acid