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Development of Polylactic Acid Thermoplastic Starch Formulations Using Maleinized Hemp Oil as Biobased Plasticizer
- Source :
- RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname, Polymers, Vol 13, Iss 1392, p 1392 (2021), Polymers, Volume 13, Issue 9
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- [EN] In this study, hemp seed oil was reacted with maleic anhydride in an ene reaction to obtain maleinized hemp seed oil (MHO). The use of MHO as a plasticizer and compatibilizer has been studied for polylactic acid (PLA) and thermoplastic starch (TPS) blends (80/20, respectively). By mechanical, thermal and morphological characterizations, the addition of MHO provides a dual effect, acting as plasticizer and compatibilizer between these two partially miscible biopolymers. The addition of MHO up to 7.5 phr (parts by weight of MHO per hundred parts of PLA and TPS) revealed a noticeable increase in the ductile properties, reaching an elongation at break 155% higher than the PLA/TPS blend. Furthermore, contrary to what has been observed with maleinized oils such as linseed oil, the thermal properties do not decrease significantly as a result of the plasticizing effect, due to the compatibilizing behavior of the MHO and the natural antioxidants present in the oil. Finally, a disintegration test was carried out in aerobic conditions at 58 degrees C, for 24 days, to demonstrate that the incorporation of the MHO, although causing a slight delay, does not impair the biodegradability of the blend, obtaining total degradation in 24 days.<br />M. Herrero-Herrero wishes to thank Ministerio de Economia y Competitividad for his grant, BES-2016-078024. J. Gomez-Caturla wish to thank Universitat Politecnica de Valencia for his FPI grant.
- Subjects :
- food.ingredient
Thermoplastic
Thermal properties
Polymers and Plastics
Starch
Organic chemistry
Mechanical properties
02 engineering and technology
mechanical properties
010402 general chemistry
Hempseed oil
01 natural sciences
Article
Polylactic acid
chemistry.chemical_compound
food
QD241-441
Linseed oil
hempseed oil
polylactic acid
Thermoplastic starch
chemistry.chemical_classification
thermal properties
Plasticizer
Maleic anhydride
General Chemistry
Hemp oil
Biodegradation
021001 nanoscience & nanotechnology
maleinization process
0104 chemical sciences
Maleinization process
Chemical engineering
chemistry
thermoplastic starch
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname, Polymers, Vol 13, Iss 1392, p 1392 (2021), Polymers, Volume 13, Issue 9
- Accession number :
- edsair.doi.dedup.....a92563ef1f5f1c0d30a3b32c0154ba9a