Foto del docente

Laura Sisti

Associate Professor

Department of Civil, Chemical, Environmental, and Materials Engineering

Academic discipline: CHIM/07 Principles of Chemistry for Applied Technologies

Research

Keywords: antibatteric properties layered double hydroxide biopolymers Natural fibers nanocomposites polyesters polyammides Biodegradation

  • Synthesis and characterization of inorganic fillers for the preparation of high performance materials.
  • Synthesis and characterization of polyester nanocomposites using organo-modified hydrotalcites and montmorillonites.
  • Synthesis and characterization of biopolymers from renwable materials.
  • Synthesis and characterization of polymers and biopolymers with antibacterial properties.
  • Preparation and characterization of lignocellulosic composites.
  • Inorganic fillers such as hydrotalcites and montmorillonites, are prepared ad hoc for imparting specific properties to the final material in which are dispersed and to improve the mechanical properties and performance in terms of thermal resistance, gas permeability and flammability. The materials thus prepared are characterized with X-ray, FT-IR and thermogravimetry.
  • In the field of nanocomposites our research is focused on the preparation of materials based on polyesters and organo modified hydrotalcites and montmorillonites. The dispersion of the inorganic fillers in the polymer matrix is obtained by direct synthesis or by mixing in the molten state with aBrabendermixer or a  co-rotating twin-screw extruders. The materials prepared are characterized by differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, transmission electron microscopy and X-ray.

  •  Within the framework of composite materials research is focused on the preparation of materials based on biopolymers and lignocellulosic fibers such as coconut fiber, sugarcane bagasse, sisal, curauá and hemp. Features such as the adhesion at the interface, impact resistance and elastic modulus, are optimized without chemically alter the fibers but developing treatments completely "bio", such as enzymatic treatments and plasma treatments. The materials prepared are characterized from the mechanical, thermal and morphologicalpoint of view.

  • The synthesis and characterization of new polymers from renewable sources is focused on the research of new monomers eable to give rise to new macromolecules that can offer biodegradability and can exhibit chemical / physical characteristics appropriate to the intended final application like barrier properties, optical properties, mechanical properties, antibacterial properties, etc. These properties are studied and developed by changing the macromolecular chain or inserting specific functional groups or co-monomers by reactions in the molten state or by UV-grafting.

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