Castro Jennifer M, Montalbán Mercedes G, Domene-López Daniel, Martín-Gullón Ignacio, García-Quesada Juan C
Chemical Engineering Department, University of Alicante, Apartado 99, 03080 Alicante, Spain.
Institute of Chemical Process Engineering, University of Alicante, Apartado 99, 03080 Alicante, Spain.
Polymers (Basel). 2023 Apr 4;15(7):1788. doi: 10.3390/polym15071788.
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 T, 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.
基于可再生和可持续材料生产及销售生物塑料的第一步是了解它们在半工业规模下的性能。因此，在本研究中，对通过熔融共混制备的、由绿色溶剂1-乙基-3-甲基咪唑醋酸盐（[Emim][Ac]）离子液体增塑的热塑性淀粉（TPS）/聚乙烯醇（PVA）薄膜的性能进行了研究。这些共混物以不同含量（27.5-42.5 %wt.）的[Emim][Ac]作为唯一增塑剂制备而成。结果表明，随着[Emim][Ac]含量的增加，这种离子液体是一种优异的增塑剂，因为它能使淀粉的晶体结构转变为无定形状态，增加柔韧性，并降低玻璃化转变温度（Tg）。这些发现表明，根据最终用途，这些生物材料的性能可根据TPS配方中[Emim][Ac]的含量进行调整，从而成为传统聚合物的一种功能性替代品。
