Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Plasticized Mechanical Recycled PLA Films Reinforced with Microbial Cellulose Particles Obtained from Kombucha Fermented in Yerba Mate Waste

Ángel Agüero
,
Esther Corral Perianes
,
Sara Soledad Abarca de las Muelas
,
Diego Lascano
ORCID logo ,
María del Mar De la Fuente García-Soto
ORCID logo ,
Mercedes Ana Peltzer
ORCID logo ,
Rafael Balart
ORCID logo ,
Marina Patricia Arrieta
*
Version 1 : Received: 13 December 2022 / Approved: 20 December 2022 / Online: 20 December 2022 (01:46:15 CET)

A peer-reviewed article of this Preprint also exists.

Agüero, Á.; Corral Perianes, E.; Abarca de las Muelas, S.S.; Lascano, D.; de la Fuente García-Soto, M.M.; Peltzer, M.A.; Balart, R.; Arrieta, M.P. Plasticized Mechanical Recycled PLA Films Reinforced with Microbial Cellulose Particles Obtained from Kombucha Fermented in Yerba Mate Waste. Polymers 2023, 15, 285. Agüero, Á.; Corral Perianes, E.; Abarca de las Muelas, S.S.; Lascano, D.; de la Fuente García-Soto, M.M.; Peltzer, M.A.; Balart, R.; Arrieta, M.P. Plasticized Mechanical Recycled PLA Films Reinforced with Microbial Cellulose Particles Obtained from Kombucha Fermented in Yerba Mate Waste. Polymers 2023, 15, 285.

Abstract

Yerba mate waste (YMW) were used to produce kombucha beverage, and the obtained microbial cellulose produced as by product (KMW) was used to reinforce mechanically recycled poly(lactic acid) (r-PLA) matrix. Microbial cellulosic particles were also produced in pristine yerba mate for comparison (KMN). To simulate the revalorization of industrial PLA products rejected during the production line, PLA was subjected to three extrusion cycles and the resultant pellets (r3-PLA) were then plasticized with 15 wt.% of acetyl tributyl citrate ester (ATBC) to obtain optically transparent and flexible films by solvent casting method. The plasticized r3-PLA-ATBC matrix was then loaded with KMW and KMN in 1 and 3 wt.%. The use of plasticizer allowed a good dispersion of microbial cellulose particles into the r3-PLA matrix, allowing to obtain flexible and transparent films which showed good structural and mechanical performance. Additionally, the obtained films showed antioxidant properties, as it was proven by release analyses conducted in direct contact with a fatty food simulant. The results suggest the potential interest of these recycled and biobased materials that are obtained from the revalorization of food waste for their industrial application in food packaging or agricultural films.

Keywords

PLA; cellulose; yerba mate; kombucha; food packaging.

Subject

Chemistry and Materials Science, Polymers and Plastics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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