Article

Biointerphases

, 7:59

First online:

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Changes in Permeability and in Mechanical Properties of Layer-by-Layer Films Made from Poly(allylamine) and Montmorillonite Postmodified upon Reaction with Dopamine

  • Vincent BallAffiliated withAdvanced Materials and Structures, Centre de Recherche Public Henri TudorFaculté de Chirurgie Dentaire, Université de Strasbourg Email author 
  • , Kadir ApaydinAffiliated withAdvanced Materials and Structures, Centre de Recherche Public Henri Tudor
  • , Abdelghani LaachachiAffiliated withAdvanced Materials and Structures, Centre de Recherche Public Henri Tudor
  • , Valérie ToniazzoAffiliated withAdvanced Materials and Structures, Centre de Recherche Public Henri Tudor
  • , David RuchAffiliated withAdvanced Materials and Structures, Centre de Recherche Public Henri Tudor

Abstract

Polyelectrolyte multilayer (PEM) films present a versatile surface functionalization method allowing to address many applications. These coatings suffer; however, from weak mechanical properties this problem can be addressed by the regular incorporation of clays in the layering process. To allow for an even better control of a whole set of film properties, among them their thermal stability, their stability in water, and their impermeability to anions, we postmodify (PAH-MMT)n films with polydopamine, by putting the pristine PEM films in contact with an oxygenated dopamine solution. This straightforward treatment allows to totally suppress the diffusion of hexacyanoferrate anions in the films and affects significantly its mechanical properties even, if the distribution of polydopamine through the film thickness is not yet known.