Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 137, Issue 26, Pages -Publisher
WILEY
DOI: 10.1002/app.48832
Keywords
biomedical applications; biopolymers and renewable polymers; coatings; polysaccharides
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [306848/2017, 421014/2018-0]
- LNNano/CNPEM (Campinas, Brazil) [22730]
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In the present study, in situ crosslinked films were easily prepared by the spray deposition of Phase A, composed by sodium alginate (Alg), hydroxypropyl methylcellulose (HPMC), epsilon-polylysine (epsilon-PL), and plasticizers, followed by the spray deposition of Phase B (Ca2+ ions) on polystyrene dishes. The effect of the amount of plasticizer, HPMC, and epsilon-PL in Phase A on the films properties was explored in a set of 12 systems. Fourier transform infrared vibrational spectroscopy in the attenuated total reflectance mode revealed that plasticizers compete with Ca2+ ions for complexation with Alg. Films with high HPMC content and low content of plasticizer and epsilon-PL presented the best mechanical properties. The best system presented Young modulus of 0.76 +/- 0.10 GPa, water vapor transmission of 5.35 +/- 0.28 mg cm(-2) h(-1), swelling ratio of 1374 +/- 97%, 99.99% reduction against Gram-negative Escherichia coli bacteria, and 99.9% reduction against Gram-positive Staphylococcus aureus bacteria. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48832.
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