Structural Details of Cellulose Nanocrystals/Polyelectrolytes Multilayers Probed by Neutron Reflectivity and AFM
| Autor: | Frédéric Dubreuil, Bruno Jean, Fabrice Cousin, Laurent Heux |
|---|---|
| Přispěvatelé: | Centre de Recherches sur les Macromolécules Végétales (CERMAV), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Macromolecular Substances Polymers Entropy Bragg peak 02 engineering and technology Microscopy Atomic Force 010402 general chemistry 01 natural sciences Allylamine Condensed Matter::Materials Science chemistry.chemical_compound Polyamines Electrochemistry General Materials Science Neutron Cellulose Anisotropy ComputingMilieux_MISCELLANEOUS Spectroscopy Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics Polyelectrolyte 0104 chemical sciences Neutron Diffraction Crystallography chemistry Chemical engineering Nanocrystal Nanoparticles 0210 nano-technology Macromolecule |
| Zdroj: | Langmuir Langmuir, American Chemical Society, 2008, pp.3452-3458 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Neutron reflectivity measurements and AFM observations were used as complementary techniques to investigate multilayered films consisting of alternating sheets of rigid cellulose nanocrystals and flexible poly(allylamine hydrochloride) (PAH) prepared by the layer-by-layer assembly technique. Both techniques showed that smooth films with a high load of cellulose could be obtained. After deposition, the cellulose component occurred as a double layer with different densities: 50% and 25% for the lower and upper layer, respectively. A linear growth of the multilayer and the presence of a Bragg peak on neutron reflectivity curves indicated the formation of a well-ordered structure resulting from entropy-driven assembly and smoothening effect of the flexible PAH macromolecules. The possible alignment of the nanocrystals when anisotropic suspensions were used is also shown and opens the route to an improved control of the architecture of these multilayers. |
| Databáze: | OpenAIRE |
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