Poly(l-lactic acid)/alkali lignin composites: properties, biocompatibility, cytotoxicity and antimicrobial behavior

In this study, poly(L-lactic acid) (PLA)/low molar mass alkali lignin (aL) (1%, 5% and 10% w/w) composites were prepared primarily for a comprehensive understanding of the effect of aL on their antimicrobial properties, biocompatibility and cytotoxic behavior. The properties were evaluated by Fourie...

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Bibliographic Details
Published in:Journal of materials science 2021-08, Vol.56 (24), p.13785-13800
Main Authors: Bužarovska, A., Blazevska-Gilev, J., Pérez-Martnez, B. T., Balahura, L. R., Pircalabioru, G. Gradisteanu, Dinescu, S., Costache, M.
Format: Article
Language:English
Subjects:
Analysis
Antiinfectives and antibacterials
Biocompatibility
Calorimetry
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composite materials
Crystallization
Crystallography and Scattering Methods
Cytotoxicity
Differential scanning calorimetry
Diffraction
Food packaging
Fourier transforms
Gram-positive bacteria
Infrared spectroscopy
Lactic acid
Lignin
Materials for Life Sciences
Materials Science
Polylactic acid
Polymer Sciences
Solid Mechanics
Thermogravimetry
Toxicity
Water vapor
X-rays
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Summary:In this study, poly(L-lactic acid) (PLA)/low molar mass alkali lignin (aL) (1%, 5% and 10% w/w) composites were prepared primarily for a comprehensive understanding of the effect of aL on their antimicrobial properties, biocompatibility and cytotoxic behavior. The properties were evaluated by Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, thermogravimetry and X-ray diffraction. The mechanical, water vapor barrier properties and photodegradability were analyzed as well. The results showed a significant inhibiting effect of aL on the crystallization behavior of PLA, increased water barrier properties (up to 73%) and photodegradability. PLA/aL composites showed a tenfold reduction in Gram-positive bacteria viability, very good cellular response and very low cytotoxicity levels, thus validating these materials as non-cytotoxic and with high potential to be used as food packaging. Graphical abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06185-6