Abstract
In this work, a novel biobased system, characterized by specific features suitable for the removal of water pollutants, was developed. Indeed, the system consists of electrospun stereocomplex polylactide (sc-PLA)-based fibers, prepared from solutions containing equimolar amounts of high-molecular-weight poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA), functionalized with an amino polyhedral oligomeric silsesquioxanes (POSS-NH2), which was added directly into the electrospinning solution. The sc-PLA/POSS-NH2 fibers, characterized by a submicrometric dispersion of the silsesquioxanes, underwent a grafting reaction with β-cyclodextrin molecules, activated to nucleophilic substitution via monotosylation (CD-O-Ts). The reaction was first investigated on neat POSS-NH2 and optimized conditions were then applied for sc-PLA/POSS-NH2 fibers. Indeed, IR and XPS measurements demonstrated the formation of a novel hybrid molecule, characterized by the linkage of the cyclodextrin to the silsesquioxane siliceous cage (...
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