1. Laboratoire des Interfaces et Matériaux Avancés, Université de Monastir, 5000 Monastir, Tunisia
2. Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-541 24, Greece
3. Institute for Polymers, Composites and Biomaterials (IPCB-CNR), via Campi Flegrei 34, Pozzuoli, Na 80078, Italy
4. Chemistry Department, University of Ioannina, P.O. Box 1186, 45110 Ioannina, Greece