PLLA–silver nanoparticles bionanocomposite membranes: Preparation, antibacterial activity, and in vitro hydrolytic degradation assessment

ABSTRACT Silver nanoparticles (AgNp) were synthesized in aqueous phase and transferred to chloroform using a fatty amine as phase transfer agent. Poly(l‐lactic acid) (PLLA) membranes were prepared using the “functionalized” chloroform. The amount of AgNp in the chloroform was determined by atomic ab...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-10, Vol.136 (39), p.n/a
Main Authors: Zanella, Gabrielle Susan, Becker, Daniela, Santos Schneider, Andrea Lima, Pezzin, Ana Paula Testa, Silva, Denise Abatti Kasper, Nogueira, André Lourenço
Format: Article
Language:English
Subjects:
Addition polymerization
antibacterial activity
Antibacterial materials
Atomic absorption analysis
Atomic beam spectroscopy
bionanocomposite membrane
Chloroform
Degradation
Differential scanning calorimetry
Emission analysis
Field emission microscopy
hydrolytic degradation
Lactic acid
Materials science
Membranes
Nanoparticles
PLLA
Polymers
Saliva
Scanning electron microscopy
Silver
silver nanoparticles
Thermal stability
Thermogravimetric analysis
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Summary:ABSTRACT Silver nanoparticles (AgNp) were synthesized in aqueous phase and transferred to chloroform using a fatty amine as phase transfer agent. Poly(l‐lactic acid) (PLLA) membranes were prepared using the “functionalized” chloroform. The amount of AgNp in the chloroform was determined by atomic absorption spectroscopy. Thermogravimetric analysis, differential scanning calorimetry, and field emission scanning electron microscopy were used to characterize the membranes. A decrease of the thermal stability of the membranes was observed upon the addition of AgNp; meanwhile, the polymer crystallinity degree increased, making the membranes more fragile and brittle. The in vitro degradation assessments of the membranes in artificial saliva suggested that the time necessary to degrade the PLLA reduced by raising the concentration of the nanostructures. Additionally, the antibacterial assays demonstrated that the addition of only 13 ppm of AgNp were enough to inhibit the formation of biofilm over the bionanocomposite membranes. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47998.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47998