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Open AccessArticle

Obtaining and Characterization of the PLA/Chitosan Foams with Antimicrobial Properties Achieved by the Emulsification Combined with the Dissolution of Chitosan by CO2 Saturation

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Department of Chemistry, Technology and Biotechnology of Food, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland
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Chitone Sp. z o.o., 15 Pionierów Street, 84-351 Lębork, Poland
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Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland
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Department of Electrochemistry, Corrosion and Material Engineering, Faculty of Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland
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Department of Food Science, University of Arkansas, 2650 N. Young Ave., Fayetteville, AR 72704, USA
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AGC Biologics, Vandtårnsvej 83B, 2860 Søborg, Copenhagen, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Massimiliano Fenice
Molecules 2019, 24(24), 4532; https://doi.org/10.3390/molecules24244532
Received: 6 November 2019 / Revised: 28 November 2019 / Accepted: 9 December 2019 / Published: 11 December 2019
(This article belongs to the Special Issue Advances in Chitin and Chitosan Science)
A new method of obtaining functional foam material has been proposed. The materials were created by mixing the poly lactic acid (PLA) solution in chloroform, chitosan (CS) dissolved in water saturated with CO2 and polyethylene glycol (PEG), and freeze-dried for removal of the solvents. The composite foams were characterized for their structural (SEM, FT-IR, density, porosity), thermal (DSC), functional (hardness, elasticity, swelling capacity, solubility), and biological (antimicrobial and cytotoxic) properties. Chitosan in the composites was a component for obtaining their foamed form with 7.4 to 22.7 times lower density compared to the neat PLA and high porosity also confirmed by the SEM. The foams had a hardness in the range of 70–440 kPa. The FT-IR analysis confirmed no new chemical bonds between the sponge ingredients. Other results showed low sorption capacity (2.5–7.2 g/g) and solubility of materials (less than 0.2%). The obtained foams had the lower Tg value and improved ability of crystallization compared to neat PLA. The addition of chitosan provides the bacteriostatic and bactericidal properties against Escherichia coli and Staphylococcus aureus. Biocompatibility studies have shown that the materials obtained are not cytotoxic to the L929 cell line. View Full-Text
Keywords: antimicrobial properties; chitosan; CO2 saturation; foam; PLA; PEG antimicrobial properties; chitosan; CO2 saturation; foam; PLA; PEG
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MDPI and ACS Style

Mania, S.; Partyka, K.; Pilch, J.; Augustin, E.; Cieślik, M.; Ryl, J.; Jinn, J.-R.; Wang, Y.-J.; Michałowska, A.; Tylingo, R. Obtaining and Characterization of the PLA/Chitosan Foams with Antimicrobial Properties Achieved by the Emulsification Combined with the Dissolution of Chitosan by CO2 Saturation. Molecules 2019, 24, 4532.

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