Bio-based composite fibers from pine essential oil and PLA/PBAT polymer blend. Morphological, physicochemical, thermal and mechanical characterization

• Published in: Materials chemistry and physics 2019-08, Vol.234, p.345-353
• Main Authors: Hernández-López, Mónica, Correa-Pacheco, Zormy Nacary, Bautista-Baños, Silvia, Zavaleta-Avejar, Leonor, Benítez-Jiménez, José Jesús, Sabino-Gutiérrez, Marcos Antonio, Ortega-Gudiño, Pedro
• Format: Article
• Language: English
• Subjects: Aliphatic compounds; Bioactive compounds; Biodegradability; Biodegradable; Blends; Carbonyl groups; Carbonyls; Chitosan; Crystallization; Differential scanning calorimetry; Elongation; Essential oils; Extrusion coating; Fibers; Formulations; Fourier transforms; Infrared reflection; Infrared spectroscopy; Mechanical properties; Miscibility; Modulus of elasticity; Oils & fats; Polyester resins; Polylactic acid; Polymer blends; Polymers; Scanning electron microscopy; Terephthalate; Thermal properties; Thermodynamic properties
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2019.01.034

Biodegradable aliphatic polyesters are an alternative to reduce the use of synthetic plastic materials that cause severe damage to the environment. Formulations based on poly (lactic acid) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT), were mixed in a 60:40 ratio, adding different concentrations of pine essential oil through the use of extrusion technology to obtain biodegradable polymer fibers. Some formulations were coated with chitosan. All the elaborated fibers were characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy-Attenuated Total Reflection (FTIR-ATR), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD) and mechanical properties. The SEM studies showed that the PBAT improves the tenacity and provides greater elasticity promoting the interaction between the blends phases with fibril formation. In the FTIR-ATR analysis, compatibility between the blends was observed due to a possible interaction of the carbonyl group of PBAT with PLA. The DSC and the mechanical properties showed partial miscibility of the blends, indicating, that the plasticizing action of the essential oil gave greater mobility, flexibility, less rigidity and crystallization in the blends. A lower Young's modulus and greater elongation at break was also observed. [Display omitted] •Polylactic acid and polybutylene adipate-co-terephthalate blends were elaborated.•Pine essential oil was added to 60:40 polymer blends using extrusion process.•SEM studies showed that polybutylene adipate-co-terephthalate improves elasticity.•In the FTIR-ATR analysis, compatibility between the blends was observed.•DSC and mechanical properties showed partial miscibility of the blends.