Datum
2023-03-22Metadata
Zur Langanzeige
Aufsatz
Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends
Zusammenfassung
Blends based on polylactic acid (PLA), chitosan, and grape seed extract (GE) were prepared by extrusion and injection molding. The effect of chitosan (5% and 15% on PLA basis) and natural extract (1% on PLA basis) incorporated into the PLA host matrix was explored regarding the thermal and mechanical properties. GE showed antioxidant activity, as determined by the DPPH assay method. Chitosan and GE affect the degree of crystallinity up to 30% as the polysaccharide acts as a nucleating agent, while the extract reduces the mobility of PLA chains. The decomposition temperature was mainly affected by adding chitosan, with a reduction of up to 25 °C. The color of the blends was specially modified after the incorporation of both components, obtaining high values of b* and L* after the addition of chitosan, while GE switched to high values of a*. The elongation at break (EB) exhibited that the polysaccharide is mainly responsible for its reduction of around 50%. Slight differences were accessed in tensile strength and Young’s modulus, which were not statistically significant. Blends showed increased irregularities in their surface appearance, as observed by SEM analysis, corresponding to the partial miscibility of both polymers.
Zitierform
In: Polymers Volume 15 / Issue 6 (2023-03-22) eissn:2073-4360Förderhinweis
Gefördert durch den Publikationsfonds der Universität KasselZitieren
@article{doi:10.17170/kobra-202304277908,
author={Goetjes, Victoria and von Boyneburgk, Claudia Louise and Heim, Hans-Peter and Horn, Marilia Marta},
title={Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends},
journal={Polymers},
year={2023}
}
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2023-04-27T14:12:53Z 2023-04-27T14:12:53Z 2023-03-22 doi:10.17170/kobra-202304277908 http://hdl.handle.net/123456789/14636 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ chitosan PLA grape seed extract DPPH assay 530 540 Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends Aufsatz Blends based on polylactic acid (PLA), chitosan, and grape seed extract (GE) were prepared by extrusion and injection molding. The effect of chitosan (5% and 15% on PLA basis) and natural extract (1% on PLA basis) incorporated into the PLA host matrix was explored regarding the thermal and mechanical properties. GE showed antioxidant activity, as determined by the DPPH assay method. Chitosan and GE affect the degree of crystallinity up to 30% as the polysaccharide acts as a nucleating agent, while the extract reduces the mobility of PLA chains. The decomposition temperature was mainly affected by adding chitosan, with a reduction of up to 25 °C. The color of the blends was specially modified after the incorporation of both components, obtaining high values of b* and L* after the addition of chitosan, while GE switched to high values of a*. The elongation at break (EB) exhibited that the polysaccharide is mainly responsible for its reduction of around 50%. Slight differences were accessed in tensile strength and Young’s modulus, which were not statistically significant. Blends showed increased irregularities in their surface appearance, as observed by SEM analysis, corresponding to the partial miscibility of both polymers. open access Goetjes, Victoria von Boyneburgk, Claudia Louise Heim, Hans-Peter Horn, Marilia Marta 12 Seiten doi:10.3390/polym15061570 Chitosan Vitamin P Nachhaltigkeit Biopolymere publishedVersion eissn:2073-4360 Issue 6 Polymers Volume 15 false 1570
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