Fabrication and thermal insulating properties of ITO/PVB nanocomposites for energy saving glass

Abstract

Chemical co-precipitation method was used to synthesize tin-doped indium oxide (ITO) nanoparticles, and the subsequent solution co-blend was employed to fabricate ITO/PVB nanocomposites. UV(Ultra-violet)-Vis(Visible)-NIR( Near Infrared) spectra show that the addition of ITO nano particles can significantly enhance the thermal insulating efficiency of ITO/PVB nanocomposites. With increasing ITO content, the thermal insulating efficiency is increased. UV is almost fully absorbed by all ITO/PVB nanocomposites. Vis transmittance-haze spectra reveal that ITO/PVB nanocomposites exhibit higher Vis transmittance over 71.3% and lower haze below 2% when ITO content is in the range of 0.1 wt%-0.7 wt%. The UV-Vis -NIR spectroscopy shows that, under the premise of over 70% transmittance to the visible light, the screening effect of the NIR can be enhanced by 80% with 0.7% ITO/PVB nanocomposite membrane compared with the undoped PVB. The thermal insulating tests indicate that, in comparison with the pure PVB film, nanocomposite films with 0.1 wt%-0.9 wt% ITO can reduce temperature by 3-8 °C. The results show that this novel nanocomposite can be used for energy-saving glass.

Keywords

polymer / nano composites / physical properties / thermal insulating

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