Self-organization in the chitosan-clay nanoparticles system regulated through polysaccharide macromolecule charging. 2. Films
| Autor: | Sergei Sarin, Irina Postnova, Vladimir Silant'ev, Yu. A. Shchipunov |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Cationic polymerization Nanoparticle Nanotechnology macromolecular substances Surfaces and Interfaces engineering.material Chitosan chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Chitin Rheology Transmission electron microscopy engineering Saponite Physical and Theoretical Chemistry Macromolecule |
| Zdroj: | Colloid Journal. 74:636-644 |
| ISSN: | 1608-3067 1061-933X |
| DOI: | 10.1134/s1061933x12050109 |
| Popis: | Scanning and transmission electron microscopy and dynamic rheology are used to thoroughly characterize the morphology and mechanical properties of bionanocomposite hydrogel prepared by mixing cationic chitosan with negatively charged particles of a synthetic clay (saponite) followed by gradual increasing of the charge of chitosan macromolecules by decreasing the pH of a medium. Gelation of the system is found to be due to the formation of a fibrillar three-dimensional network structure. It is shown that the size fibrils, the density of the network structure, and its mechanical properties are determined by the concentration ratio between the polysaccharide and saponite particles. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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