期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 167, 期 -, 页码 255-266出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.11.140
关键词
Supercritical impregnation; Polylactic acid (PLA); Lignin nanoparticles; Cinnamaldehyde; Toxicity studies; Disintegration
资金
- DICYT [081871GL_TM]
- Basal Financing Program for Scientific and Technological Centers of Excellence CEDENNA [AFB180001]
- University of Santiago de Chile [USA1799 Vridei081971AG_GO]
PLA/Lig-Np nanocomposites containing cinnamaldehyde (Ci) were obtained by a combination of melt extrusion and supercritical impregnation process. The developed films showed strong UV-light barrier property and good biodegradability under composting conditions. Toxicity studies in normal rats confirmed the safety of the nanocomposites for potential applications in food packaging and biomedical fields.
Poly (lactic acid)/lignin nanocomposites (PLA/Lig-Np) containing cinnamaldehyde (Ci) were obtained by a combination of melt extrusion and supercritical impregnation process. In this work, Ci impregnation tests were carried out in a high-pressure cell at 40 degrees C for 3 h using 12 MPa and 1 MPa min(-1) of depressurization rate, obtaining impregnation yields ranging from 5.7 to 10.8% w/w. Thermal, mechanical and colorimetric properties of the developed films were affected by the incorporation of lignin nanoparticles and the active compound, obtaining biodegradable plastic materials with a strong UV-light barrier property compared to PLA films. In addition, disintegrability tests under composting conditions confirmed the biodegradable character of nanocomposites developed. On day 23, a disintegration percentage greater than 90% was determined for all bionanocomposites. Finally, to establish the possible toxicity effect of the nanocomposites obtained, studies in vivo were performed in normal rats. Toxicity studies showed normal blood parameters after a single dose of nanocomposites. PLA/Ci/Lig-Np bionanocomposite films could be potentially applied to design biodegradable UV-light barrier materials for food packaging and biomedical applications. (C) 2020 Elsevier B.V. All rights reserved.
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