Physicochemical properties of PLA lignin blends
By Oihana Gordobil, I. Egüés, R. Llano-Ponte, J. Labidi. 2014
282 citations recorded by the source corpus.
Commercial alkali lignin (CL) and lignin extracted from almond shells by organosolv process (OL) were used for the preparation of blends with poly(lactic acid) (PLA) with different percentages (0.5, 1, 5, 10 and 20%) by extrusion method. Both lignins were acetylated to improve their compatibility with PLA. PLA/acetylated lignin blends exhibited greater compatibility than non-acetylated PLA/lignin. Characterization of lignins has been performed using HPLC, FT-IR, GPC, DSC and TGA. All lignins showed high purity. Acetylated lignins had lower Tg and higher thermal stability than original lignins. Thermal and mechanical properties of different blends were investigated. Morphology before and after hydrolytic degradations of blends with 5% of different lignins were also investigated. The addition of acetylated lignin appears to prevent hydrolytic degradation of PLA. Lignin content increased the thermal stability of PLA but does not favor the crystallization of PLA. Maximum strength decreased with high percentages of originals lignins. However, PLA/acetylated lignin blends remains fairly constant, even at high percentages. In all cases, the elongation at break was increased.
Subfields: Biomaterials, Biomedical Engineering
View Paper: https://www.semanticscholar.org/paper/279e93bd443359bfaab593315e9af6bab3b0a4ec
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In Biomaterials
In Biomedical Engineering
Citations in the corpus
- Evaluation of PLA–lignin bioplastics properties before and after accelerated weathering (2015, unknown): “Different types of lignin have been incorporated in PLA by melt mixing [18,19], graft polymerization of lactide onto lignin [20], manual mixing [21], etc.”
- Synergic effect of cellulose and lignin nanostructures in PLA based systems for food antibacterial packaging (2016, unknown): “Similar behaviours were also detected by some other authors [47, 48].”
- Natural antioxidants as stabilizers for polymers (2017, background): “[165,166], poly(3-hydroxybutyrate) (PHB) [167], PCL [168] and in natural rubber [169,170].”