Preparation, characterization and biodegradation of biopolymer nanocomposites based on fumed silica |
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| Authors: | K Fukushima D Tabuani C Abbate M Arena P Rizzarelli |
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| Institution: | aPolitecnico di Torino Sede di Alessandria, INSTM Research Unit, Viale Teresa Michel 5, 15100 Alessandria, Italy;bPROPLAST Consortium, Viale Teresa Michel 5, 15100 Alessandria, Italy;cDipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Università di Catania, Via S. Sofia 98, 95123 Catania, Italy;dConsiglio Nazionale delle Ricerche, Istituto di Chimica e Tecnologia dei Polimeri, Via Paolo Gaifami 18, 95126 Catania, Italy |
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| Abstract: | PLA and PCL based nanocomposites prepared by adding three different types of fumed silica were obtained by melt blending. Materials were characterized by means of Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and Dynamic–Mechanical Thermal Analysis (DMTA).A good distribution of the fumed silica into both polymer matrices was observed. The highest thermo-mechanical improvements were reached by addition of the fumed silica with higher surface area. PLA and its nanocomposites were degraded in compost at 58 °C; at this temperature all samples presented a significant level of polymer degradation, but a certain protection action of silica towards PLA degradation was observed, whereas the addition of fumed silica did not show considerable influence on the degradation trend of PCL. These dissimilarities were attributed to the different degradation mechanism of the two polymers. |
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| Keywords: | Biopolymers Nanocomposites Fumed silica Biodegradation |
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