Sanna, Roberta (2014) Synthesis and characterization of new polymeric materials for advanced applications. Doctoral Thesis.
The main aim of this thesis was to synthesize and characterize new kinds of polymeric nanocomposite materials, including stimuli responsive hydrogels, organic-inorganic interpenetrating polymer networks, polyacrylates and polyurethanes. Specifically, this work was divided in two main threads: in the first one, electric field-, ionic force-, pH- and thermo-responsive hydrogels were prepared, whose thermal and mechanical properties, as well as the swelling behavior were strongly improved by the introduction of graphene or CNC into the polymer matrix; in the second one, a simple and efficient method for graphene production was developed and used for the obtainment of the corresponding polymer nanocomposites. In particular, defect-free graphene was produced at high concentration by sonication of graphite in different liquid media and, for the first time, directly in a monomer, thus further simplifying the route for the synthesis of nanocomposites. Moreover, the effect of the nanofillers on the general properties of all the synthesized materials was also widely investigated.
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