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Resumo(s)
In recent years, there has been an increase of infectious diseases caused by different microorganisms and the
development of antibiotic resistance. In this way, the search for new and efficient antibacterial materials is imperative.
The main polysaccharides currently used in the biomedical and pharmaceutical domains are chitin and its derivative
chitosan (CH) and alginates (ALG). In this study, a simple technique of Layer by Layer (LbL) of applying polycation CH
and polyanion ALG was used to prepare CH/ALG multilayers on cotton samples via the electrostatic assembly with
success. The CH/ALG cotton samples (functionalized) were investigated for their antibacterial properties towards
Staphylococcus aureus and Klebsiella pneumonia using the international standard method JIS L 1902:2002. The
antibacterial activity of the functionalized samples was tested in terms of bacteriostatic and bactericidal activity, and
results showed that the samples exhibited a bacteriostatic effect on the two bacteria tested, as expected. In addition,
samples with five layers (CH/ALG/CH/ALG/CH) were more effective in inhibiting bacterial growth. This new coating for
cellulosic fibers is a new strategy and may open new avenues for the development of antimicrobial polymers with
potential application in health-care field.
Descrição
Palavras-chave
Chitosan Textiles Alginate Cotton