Coloration of the polylactic acid with the natural dye extracted from acacia cyanophylla flowers
| Autor: | Mohamed Ben Amar, Afef Fajraoui, Foued Halouani, Catherine Lacoste, Philippe Dony, Serge Odof, Jalel Ben Nasr |
|---|---|
| Přispěvatelé: | Institut de Thermique, Mécanique, Matériaux (ITheMM), Université de Reims Champagne-Ardenne (URCA), Matériaux et Procédés Innovants (MaPI), Université de Reims Champagne-Ardenne (URCA)-Université de Reims Champagne-Ardenne (URCA), Laboratory of Electromechanical Systems (LASEM), National Engineering School of Sfax, University of Sfax |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Materials science Polymers and Plastics Chemical structure 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials chemistry.chemical_compound Polylactic acid Fourier transform infrared spectroscopy ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Organic Chemistry Polymer [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering 13. Climate action engineering Biopolymer 0210 nano-technology Colorimetric analysis Natural dye |
| Zdroj: | Polymer Testing Polymer Testing, Elsevier, 2019, 78, pp.105988. ⟨10.1016/j.polymertesting.2019.105988⟩ |
| ISSN: | 0142-9418 |
| DOI: | 10.1016/j.polymertesting.2019.105988⟩ |
| Popis: | The use of synthetic dyes in food packaging disrupts the environment and human health, to solve this problem we use natural dyes. The aim of this paper is to study the coloration of a biopolymer such as the PLA 5200 D with a natural dye extracted from Acacia cyanophylla flowers. The biodegradable colored material was prepared using an internal mixer and the influence of the implementation parameters such as temperature, rotor speed and mixing time has been studied. The chemical structure of the dye was confirmed by Fourier Transform Infrared spectroscopy (FTIR) and UV-spectroscopy. Thermal properties of the samples were performed using Differential Scanning Calorimetric (DSC) and Thermo Gravimetric Analysis (TGA). The coloring of the polymer (darker yellowing) was studied to quantify the dye in the mixture. The aging of the colored material was followed by colorimetric analysis after its exposure under UV lamps. The results show that the dye remains stable until 130 °C and when the temperature goes up to 160 °C, the dye is crystallizing. The degradation was observed at 190 °C. A good elaborate colored material was promoted for a 50 rpm blending during 5 min at 90 °C and with a concentration of die of 0.5% in the internal mixer. Aging tests show that the material remained almost stable after one week under UV radiations. |
| Databáze: | OpenAIRE |
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