PPG-CONICET First Progrtress Report

CALVO, E.J.; KARAPEN, J.; WILLIAMS, F.J.; BOSSI, M.; SOLLER ILLIA, G.

2010-07-01/2010-09-30

Química

Energia-Varios

The objective of the one-year research program is to explore, as proof of concept, technologies for producing visible/near infra-red reflective materials that undergo thermal induced switching for coatings applications. The specific goal is to obtain materials that could be incorporated into glass/resin systems to achieve this effect. The materials would need to have the following properties: • A refractive index in the range of 1.4-1.6, comparable to PPG resin systems, and when thermally switched, change the RI by 0.4 to 0.6 units. • The thermal temperature switch of the material(s), from being transmissive/ absorbing to a high reflectance state in the near and mid infrared region, takes place between 70°F and 80°F. • The target is to achieve an integrated total solar reflectance of 25%. • Color/contrast change observed in the visible region is acceptable and preferred • Switching speed could be as long as minutes. • Materials stable in air. • Materials considered non-toxic.