Structure and properties of polyurethane/YAG:Tb3+ nanocomposites with
luminescence properties (in English)
Polimery 2007, No 5, 340
Elastic polyurethanes films with luminescent properties have attracted increasing attention, both as a subject of fundamental and applied research. In the present study, polyurethane nanocomposites containing 0.05 to 0.2 wt. % of nanofillers were prepared by in situ polymerization. These nanocomposites were subsequently used to investigate the influence of the nanoparticles' content on their structure and properties. PUR was synthesized using polycaprolactone diol (PCL diol) and dicyclohexylmethane-4,4'-diisocyanate (HMDI) with addition of diols as chains extenders. The nanofiller in the form of yttrium-aluminum-garnet (YAG) containing 10 wt. % of Tb3+ was added and samples of composites were synthesized employing prepolymer fabrication route. Series of nanocomposites with exhibited high luminescence and intensity of emission. Microstructure of these composites was investigated using atomic force microscopy (AFM) in a tapping mode. The grain size analysis of nanofillers was performed with high resolution scanning electron microscopy (HRSEM) and high resolution transmission electron microscopy (HRTEM). The mechanical and optical properties of the specimens have been correlated to their microstructure.
Key words: polyurethane, nanocomposite, morphology, optical properties, thermal properties, mechanical properties
J. Ryszkowska, E. Zawadzak, D. Hreniak, W. Stręk, K. J. Kurzydłowski
Structure and properties of polyurethane/YAG:Tb3+ nanocomposites with luminescence properties (in English)