Obtenção e caracterização de complexos polieletrolíticos de quitosana e poli (metacrilato de sódio)
Polyelectrolyte complexes (PECs) nanoparticles were prepared using chitosan and sodium polymethacrylate. The complex formation was investigated using turbidimetry, conductometry, viscometry, and dynamic light scattering. The presence of excess positive charges was evidenced by zeta potential meas...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/19423 |
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| Resumo: | Polyelectrolyte complexes (PECs) nanoparticles were prepared using chitosan and sodium
polymethacrylate. The complex formation was investigated using turbidimetry,
conductometry, viscometry, and dynamic light scattering. The presence of excess positive
charges was evidenced by zeta potential measurements. The particle diameter was
characterized by dynamic light scattering and the morphology by atomic force microscopy.
In all experiments an abrupt change in behavior was observed at a carboxyl:amino molar
ratio around 0.7−0.8. Those changes in behavior were related to a proposed mechanism of
complex formation based on the decrease of macromolecular dimensions of soluble
polyelectrolyte complex clusters, followed by phase segregation |
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