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PLLA–silver nanoparticles bionanocomposite membranes: Preparation, antibacterial activity, and in vitro hydrolytic degradation assessment
Author(s) -
Zanella Gabrielle Susan,
Becker Daniela,
Santos Schneider Andrea Lima,
Pezzin Ana Paula Testa,
Silva Denise Abatti Kasper,
Nogueira André Lourenço
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47998
Subject(s) - membrane , thermogravimetric analysis , materials science , differential scanning calorimetry , chemical engineering , crystallinity , thermal stability , chloroform , silver nanoparticle , polymer chemistry , nanoparticle , fourier transform infrared spectroscopy , polymer , nuclear chemistry , chemistry , organic chemistry , nanotechnology , composite material , biochemistry , physics , engineering , thermodynamics
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.