INVESTIGADORES
PARRA Rodrigo
congresos y reuniones científicas
Título:
Thermochromic VO2/PVP films triggered by solar irradiation for smart windows
Autor/es:
PUIG, JULIETA; ARENAS, GUSTAVO; MORALES, GUSTAVO; ÁLVAREZ CERIMEDO, M. SOLEDAD; PARRA, RODRIGO; HOPPE, CRISTINA E.
Lugar:
Mar del Plata
Reunión:
Congreso; XVI Latin-American Polymer Symposium (SLAP 2018), XIV Iberoamerican Polymer Congress (CIP 2018); 2018
Resumen:
Energy-efficient smart windows are needed to reduce the unwanted heat loss/gain produced by solar radiation through windows.1 Thermochromic films can vary their optical properties with the temperature. Vanadium Dioxide (VO2) undergoes a reversible metalinsulator transition (MIT) at a critical temperature (Tc) of 68°C. Below Tc, VO2 is a monoclinic (M) crystalline structure, which is insulating and transparent to infrared light, but above Tc, it becomes a tetragonal crystalline structure that is metallic and reflective to infrared light. These unique properties make VO2 a promising material for its use in thermochromic films for smart windows.2 Furthermore, photothermal agents, such as graphene oxide (GO) and anisotropic gold nanostructures can efficiently convert light into heat. With the aim to increase energy efficiency in buildings, the objective of the present work is to develop photo-thermochromic films based on VO2 and GO and / or gold anisotropic nanostructures, for their application in the design and construction of smart windows. The phase transition of VO2 (thermochromic effect), could be activated by the change in temperature induced by solar radiation onto the GO and / or the anisotropic gold nanostructures (photothermal effect), allowing the modulation of heat and natural light entering for specific weather conditions.