Otro
Antimicrobial Bacterial Cellulose-Silver Nanoparticles Composite Membranes
Registro en:
Journal of Nanomaterials. New York: Hindawi Publishing Corporation, p. 8, 2011.
1687-4110
10.1155/2011/721631
WOS:000298428100001
WOS000298428100001.pdf
Autor
Barud, Hernane S.
Regiani, Thais
Marques, Rodrigo Fernando Costa
Lustri, Wilton R.
Messaddeq, Younes
Ribeiro, Sidney José Lima
Resumen
Antimicrobial bacterial cellulose-silver nanoparticles composite membranes have been obtained by in situ preparation of Ag nanoparticles from hydrolytic decomposition of silver nitrate solution using triethanolamine as reducing and complexing agent. The formation of silver nanoparticles was evidenced by the X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and absorption in the UV-Visible (350nm to 600 nm). Thermal and mechanical properties together with swelling behavior for water were considered. TEA concentration was observed to be important in order to obtain only Ag particles and not a mixture of silver oxides. It was also observed to control particle size and amount of silver contents in bacterial cellulose. The composite membranes exhibited strong antimicrobial activity against Gram-negative and Gram-positive bacteria. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)