Publication: Thermoplastic starch/polyvinyl alcohol blends modification by citric acid–glycerol polyesters
Authors
Castro, J. M. ; Montalbán, M. G. ; Domene-López, D. ; Martin-Gullon, I. ; García-Quesada, J. C.
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Facultad de Química
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Publisher
MDPI
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Description
© 2023 by the authors____ This document is the published version of a published work that appeared in final form in Polymers ____
This document is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0 ____
To access the final edited and published work see:
https://doi.org/10.3390/polym15071788
Abstract
The first step towards the production and marketing of bioplastics based on renewable and
sustainable materials is to know their behavior at a semi-industrial scale. For this reason, in this work,
the properties of thermoplastic starch (TPS)/polyvinyl alcohol (PVA) films plasticized by a green solvent,
as the 1-ethyl-3-methylimidazolium acetate ([Emim+][Ac]) ionic liquid, produced by melt-mixing
were studied. These blends were prepared with a different content of [Emim+][Ac] (27.5–42.5 %wt.)
as a unique plasticizer. According to the results, this ionic liquid is an excellent plasticizer due to
the transformation of the crystalline structure of the starch to an amorphous state, the increase in
flexibility, and the drop in Tg, as the [Emim+][Ac] amount increases. These findings show that
the properties of these biomaterials could be modified in the function of [Emim+][Ac] content in
the formulations of TPS, depending on their final use, thus becoming a functional alternative to
conventional polymers.
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