Funcionalização de tecidos de malhas e filmes de quitosana com Ximenia Americana L. para o uso antimicrobiano
Currently, the demand for functional textiles, such as fabrics and antimicrobial polymeric films, which are environmentally safer, has been increasing. Thus, chemical compounds that pose risks to the environment and to man can be replaced by natural products. As these products are safe and non-to...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | doctoralThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/50058 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | Currently, the demand for functional textiles, such as fabrics and antimicrobial
polymeric films, which are environmentally safer, has been increasing. Thus, chemical
compounds that pose risks to the environment and to man can be replaced by natural
products. As these products are safe and non-toxic, they are an alternative of great
importance especially for textiles in the medical and health fields. Therefore, in view of
the various plants used in popular medicine, Ximenia americana L. and chitosan are
cited. These substances have the properties of biodegradability, biocompatibility and
antibacterial action. The present work aims at the functionalization of knit fabrics and
polymeric chitosan films with American ximenia for antimicrobial use. Functionalization
in the meshes was performed using two methods: exhaustion (alt) and impregnation
(padding). In the process of exhaustion, the mesh remains under agitation in contact
with the ximenia extract, and in the impregnation, the fabric passes through pressure
rollers so that the extract is forced to penetrate it. The polymeric chitosan films were
produced by the solvent evaporation method, known as the solvent casting method.
All functionalized materials were characterized by several techniques, namely
scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR),
thermogravimetric analysis (Tg), color strength, tensile strength, and antimicrobial
activity. For polymeric films, measurements of thickness, humidity and opacity were
made, in addition to the characterizations already mentioned. Regarding antimicrobial
characterization, all functionalized tissues were shown to be bactericidal for
Staphylococus aureus bacteria (S. aureus), as they formed inhibition halos, showing
that the bacteria did not proliferate. In the chitosan films with ximenia, there were larger
halo formations demonstrating that these have better properties. In view of the results,
we conclude that functionalization proved to be effective for the purposes of this work,
since all textiles (fabrics and films) had a bactericidal character. |
|---|