Turbidity diagrams of polyanion/polycation complexes in solution as a potential tool to predict the occurrence of polyelectrolyte multilayer deposition
| Autor: | Bernard Senger, Vincent Ball, Fouzia Boulmedais, Jean-Claude Voegel, Pierre Schaaf, Armelle Chassepot, Hajare Mjahed |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Anions
Langmuir Polymers Surface Properties Inorganic chemistry chemical synthesis chemistry Salt (chemistry) Biomaterials Electrolytes Colloid and Surface Chemistry Cations Turbidity Particle Size chemistry.chemical_classification Chemistry Cationic polymerization Membranes Artificial Polyelectrolyte Surfaces Coatings and Films Electronic Optical and Magnetic Materials Solutions Ionic strength Surface modification Chimie/Autre Deposition (chemistry) |
| Popis: | Surface functionalization with polyelectrolyte multilayer films (PEM films) has become very popular owing to its simplicity and versatility. However, even if some research is already available, this field of surface chemistry lacks a systematic knowledge of how the polyelectrolyte structure and solution conditions influence the growth of PEM films. In this investigation, we focus on the possible relationship between turbidity of polycation and polyanion mixtures in solution, and the buildup of PEM films made from the same polyelectrolytes in the same physicochemical conditions, namely pH, temperature and ionic strength. It comes out that for six different polycation/polyanion combinations there is a clear correlation between the turbidity evolution of polycation/polyanion complexes with the salt concentration and the evolution of the film deposition with the same parameter. In this investigation, the complexes in solution were prepared in conditions where the ratio between the number of cationic to anionic groups was close to unity. Even if there is a correlation between turbidity in solution and PEM film deposition, we found some exceptions in the low salt concentration regime. This work is an extension of the preliminary works of Cohen Stuart (D. Kovačević et al. Langmuir 18 (2002) 5607-5612) and Sukishvili et al. (S.A. Sukhishvili, E. Kharlampieva and V. Izumrudov, Macromolecules 39 (2006) 8873-8881). journal article research support, non-u.s. gov't 2010 Jun 01 2010 02 21 imported |
| Databáze: | OpenAIRE |
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