2024-03-28T21:39:04Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2325332022-06-02T11:07:42Zcom_10261_56com_10261_3col_10261_309
00925njm 22002777a 4500
dc
Aragón-Gutiérrez, Alejandro
author
Arrieta, Marina P.
author
López-González, Mar
author
Fernández-García, Marta
author
López, Daniel
author
2020
Bionanocomposites 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.
MATERIALS 13 (2020)
http://hdl.handle.net/10261/232533
10.3390/ma13214910
http://dx.doi.org/10.13039/501100003329
Biocomposites
Biodegradable polymers
plasticizers
food packaging
poly (lactic acid)
Citrate esters
silica aerogel
Hybrid biocomposites based on poly(lactic acid) and silica aerogel for food packaging applications