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Structure and properties of polyurethane/YAG:Tb3+ nano-composites with luminescence properties

Joanna Ryszkowska 1,  Ewelina A. Zawadzak 1,  Dariusz Hreniak 2,  Wiesław Stręk 2,  Krzysztof J. Kurzydlowski 1

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland

Abstract

Elastic polyurethane foils with luminescent properties have attracted increasing attention, both as a subject of fundamental and applied research in the domain of electro-optical phenomena and devices. In the present study, nano-composites were prepared, by in-situ polymerization, which contained 0.05 to 0.2% weights of nano-fillers. These nano-composites were subsequently used to investigate the influence of the nano-particles content on the structure and properties of polyurethanes composites.
The following components were used for PUR synthesis: polycaprolactone diol (PCL) Mn=2000, 4,4'-dicyclohexymethane diisocyanate (H'MDI), chains extenders (DIOL A, DIOL B). The nano-filler in the form YAG containing 10% Tb3+ was added and samples of composites were synthesized employing pre-polymer fabrication route.
Series of nano-composites with various amounts of nano-filler were obtained which exhibited high luminescence and intensity of emissions. Microstructure of these composites was investigated via Atomic Force Microscopy in a Tapping Mode. The grain size analysis of nano-fillers was performed with HRSEM and TEM. The mechanical and electro-optical properties of the specimens have been correlated to their microstructure.
This research was financed by the Polish State Committee for Scientific Research (PBZ-KBN-095/T08/2003).

 

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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium D, by Ewelina A. Zawadzak
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 13:49
Revised:   2009-06-07 00:44