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Keywords = epoxidized Brazil nut oil (EBNO)

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17 pages, 6533 KiB  
Article
Novel Epoxidized Brazil Nut Oil as a Promising Plasticizing Agent for PLA
by Aina Perez-Nakai, Alejandro Lerma-Canto, Ivan Dominguez-Candela, Jose Miguel Ferri and Vicent Fombuena
Polymers 2023, 15(9), 1997; https://doi.org/10.3390/polym15091997 - 23 Apr 2023
Cited by 17 | Viewed by 2615
Abstract
This work evaluates for the first time the potential of an environmentally friendly plasticizer derived from epoxidized Brazil nut oil (EBNO) for biopolymers, such as poly(lactic acid) (PLA). EBNO was used due to its high epoxy content, reaching an oxirane oxygen content of [...] Read more.
This work evaluates for the first time the potential of an environmentally friendly plasticizer derived from epoxidized Brazil nut oil (EBNO) for biopolymers, such as poly(lactic acid) (PLA). EBNO was used due to its high epoxy content, reaching an oxirane oxygen content of 4.22% after 8 h of epoxidation for a peroxide/oil ratio of 2:1. Melt extrusion was used to plasticize PLA formulations with different EBNO contents in the range of 0–10 phr. The effects of different amounts of EBNO in the PLA matrix were studied by performing mechanical, thermal, thermomechanical, and morphological characterizations. The tensile test demonstrated the feasibility of EBNO as a plasticizer for PLA by increasing the elongation at break by 70.9% for the plasticized PLA with 7.5 phr of EBNO content in comparison to the unplasticized PLA. The field-emission scanning electron microscopy (FESEM) of the fractured surfaces from the impact tests showed an increase in porosity and roughness in the areas with EBNO addition, which was characteristic of ductile failure. In addition, a disintegration test was performed, and no influence on the PLA biodegradation process was observed. The overall results demonstrate the ability of EBNO to compete with other commercial plasticizers in improving the ductile properties of PLA. Full article
(This article belongs to the Special Issue Macromolecules Derived from Vegetable Oils)
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