Characterization of coated biodegradable trays by spectroscopic techniques
| Autor: | Maria Victória Eiras Grossmann, Henrique de Santana, Mônica Oliveira Reis, Ana Paula Bilck, Fabio Yamashita |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Thermoplastic Starch 02 engineering and technology 010402 general chemistry 01 natural sciences Beeswax chemistry.chemical_compound symbols.namesake stomatognathic system chemistry.chemical_classification Hydrogen bond technology industry and agriculture respiratory system equipment and supplies 021001 nanoscience & nanotechnology 0104 chemical sciences Lactic acid chemistry Chemical engineering visual_art Emulsion visual_art.visual_art_medium symbols lipids (amino acids peptides and proteins) Extrusion 0210 nano-technology Raman spectroscopy Agronomy and Crop Science |
| Zdroj: | Industrial Crops and Products. 112:511-514 |
| ISSN: | 0926-6690 |
| DOI: | 10.1016/j.indcrop.2017.12.041 |
| Popis: | Biodegradable trays of thermoplastic starch (TPS)/poly (lactic acid) (PLA) blends were produced by flat extrusion followed by thermopressing. The trays were coated by immersion in beeswax (BW) emulsion (1, 2, and 3 g BW/100 g ethyl alcohol + Tween 80 solution). The structural properties of the coated trays were characterized by Confocal Raman and Infrared spectroscopies to verify the coating-tray and TPS-PLA interactions. The characterization of the TPS/PLA biodegradable trays revealed that despite the low compatibility between starch (hydrophilic) and PLA (hydrophobic) there was interaction by hydrogen bonding between the starch and PLA carbonyl group, characterizing them as an immiscible blend. The BW showed weak interaction with PLA, but this interaction was sufficient to provide a good adhesion of the BW on the surface of the trays, reducing their hygroscopicity and enabling a commercial scale production of this biodegradable trays type. |
| Databáze: | OpenAIRE |
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