Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends
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 mechanica...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/6/1570 |
| _version_ | 1797609272401461248 |
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| author | Victoria Goetjes Claudia L. von Boyneburgk Hans-Peter Heim Marilia M. Horn |
| author_facet | Victoria Goetjes Claudia L. von Boyneburgk Hans-Peter Heim Marilia M. Horn |
| author_sort | Victoria Goetjes |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T05:59:10Z |
| format | Article |
| id | doaj.art-5ed67dc70f91430ea5b58dd3606c6b4b |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T05:59:10Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-5ed67dc70f91430ea5b58dd3606c6b4b2023-11-17T13:27:24ZengMDPI AGPolymers2073-43602023-03-01156157010.3390/polym15061570Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA BlendsVictoria Goetjes0Claudia L. von Boyneburgk1Hans-Peter Heim2Marilia M. Horn3Institute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, GermanyInstitute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, GermanyInstitute of Material Engineering, Polymer Engineering, University of Kassel, Mönchebergstr. 3, 34125 Kassel, GermanyPhysical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinich-Plett Straße 40, 34109 Kassel, GermanyBlends 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.https://www.mdpi.com/2073-4360/15/6/1570chitosanPLAgrape seed extractDPPH assay |
| spellingShingle | Victoria Goetjes Claudia L. von Boyneburgk Hans-Peter Heim Marilia M. Horn Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends Polymers chitosan PLA grape seed extract DPPH assay |
| title | Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends |
| title_full | Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends |
| title_fullStr | Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends |
| title_full_unstemmed | Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends |
| title_short | Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends |
| title_sort | influence of chitosan and grape seed extract on thermal and mechanical properties of pla blends |
| topic | chitosan PLA grape seed extract DPPH assay |
| url | https://www.mdpi.com/2073-4360/15/6/1570 |
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