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Type: Artigo de periódico
Title: Inhibition Of Bacterial Adhesion On Cellulose Acetate Membranes Containing Silver Nanoparticles
Author: Andrade
Patricia Fernanda; de Faria
Andreia Fonseca; Quites
Fernando Junior; Oliveira
Silvana Ruella; Alves
Oswaldo Luiz; Zessi Arruda
Marco Aurelio; Goncalves
Maria do Carmo
Abstract: Membrane fouling is one of the major drawbacks that changes polymeric membrane performance. Biofouling has a series of effects, such as to reduce membrane permeability, to increase energy costs and to decrease membrane lifetime. Cellulose acetate (CA) membranes, containing different amounts of beta-cyclodextrin stabilized silver nanoparticles (AgNP-beta-CD), were prepared by dispersing the pre-synthesized nanoparticle (28 nm mean diameter) in CA casting solution. These membranes were obtained by phase-inversion process, in order to achieve both antibacterial properties and biofouling resistance. The typical crystal structure of the AgNP-beta-CD, before and after being dispersed in CA membranes, was detected by X-ray diffraction. Field emission electron microscopy images showed membranes with finger-like morphology and atomic force microscopy images showed the presence of nanoparticles in the membrane top surface. The results indicated that the presence of AgNP-beta-CD did not influence the membrane thermal degradation but increased the water flux through the membrane. The antibacterial activity of the membranes containing AgNP-beta-CD (CA-Ag) was evaluated against E. coli and S. aureus using the plate count method. The results showed that almost 100 % of the E. coli and S. aureus viable cells were inhibited after 12 h of contact with CA-Ag membranes. In addition, the CA membranes were able to prevent more than 90 % E. coli biofilm formation. Based on the results, CA membranes prepared with AgNP-beta-CD can be potentially applied as anti-biofouling filtration membranes for water treatment and wastewater recovery.
Subject: Ultrafiltration Membranes
Nanocomposite Membranes
Citation: Inhibition Of Bacterial Adhesion On Cellulose Acetate Membranes Containing Silver Nanoparticles. Springer, v. 22, p. 3895-3906 DEC-2015.
Rights: fechado
Identifier DOI: 10.1007/s10570-015-0752-6
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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