Greffage irréversible de polyélectrolytes  sur des substrats de silice et de mica et étude des propriétés de surface et de gonflement
A protocol for irreversibly grafting of amphiphilic copolymer polystyrene-b-poly (sodium acrylate) PS-b-PANa onto hydrophobized mica and silica was developed, using the grafting to approach. Surface properties of charge block were evaluated. The swelling of chains and force ionic effect were studied by ellipsometry. The interaction forces and frictional forces were evaluated by SFA technique. Forces profiles were stable and clearly repulsive in loading and receding, indicating an irreversible grafting. High friction forces onto PANa brushes were determinate without evidence of damage at the surface. The comparison between solution behavior of polyacrylic acid, PAA and PANa brushes, obtained via different grafting methods, was equally investigated.
Surfaces intelligentes PS-b-PANa SFA Smart surfaces Surface properties Irreversible grafted Amphiphilic Copolymer PS-b-PAA Ionic strength Swelling Friction