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Title

Hybrid biocomposites based on poly(lactic acid) and silica aerogel for food packaging applications

AuthorsAragón-Gutiérrez, Alejandro; Arrieta, Marina P.; López-González, Mar; Fernández-García, Marta CSIC ORCID; López, Daniel CSIC ORCID
KeywordsBiocomposites
Biodegradable polymers
plasticizers
food packaging
poly (lactic acid)
citrate esters
silica aerogel
Issue Date2020
CitationMATERIALS 13 (2020)
AbstractBionanocomposites based on poly (lactic acid) (PLA) and silica aerogel (SiA) were developed by means of melt extrusion process. PLA-SiA composite films were plasticized with 15 wt.% of acetyl (tributyl citrate) (ATBC) to facilitate the PLA processability as well as to attain flexible polymeric formulations for films for food packaging purposes. Meanwhile, SiA was added in four dierent proportions (0.5, 1, 3 and 5 wt.%) to evaluate the ability of SiA to improve the thermal, mechanical, and barrier performance of the bionanocomposites. The mechanical performance, thermal stability as well as the barrier properties against dierent gases (carbon dioxide, nitrogen, and oxygen) of the bionanocomposites were evaluated. It was observed that the addition of 3 wt.% of SiA to the plasticized PLA-ATBC matrix showed simultaneously an improvement on the thermal stability as well as the mechanical and barrier performance of films. Finally, PLA-SiA film formulations were disintegrated in compost at the lab-scale level. The combination of ATBC and SiA sped up the disintegration of PLA matrix. Thus, the bionanocomposites produced here show great potential as sustainable polymeric formulations with interest in the food packaging sector.
Publisher version (URL)http://dx.doi.org/10.3390/ma13214910
URIhttp://hdl.handle.net/10261/232533
Identifiersdoi: 10.3390/ma13214910
issn: 1996-1944
Appears in Collections:(ICTP) Artículos
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