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A facile synthesis of waterborne polyurethane/silica/CdTe-QDs nanocomposites with excellent mechanical, thermal and optical properties

XIAOSAN ZHOU1, ZHAOQI PAN1, YUN GAO1,*

Affiliation

  1. College of Materials Science and Engineering East China University of Science and Technology Shanghai 200237; China

Abstract

Monodispersed waterborne polyurethane WPU/silica/CdTe QDs nanocomposites were directly synthesized via the reaction between the groups of amine group ( NH 2 ) on the SiO 2 hybrided CdTe QDs surface and an isocyanate end group NCO) of polymer chains. The SiO 2 hybrided CdTe QDs were characterized by Dynamic Light Scattering, Transmission Electron Microscopy. The WPU/silica/CdTe QDs nanocomposites were cha racterized by Fluorescence Spectroscopy , the results shows the nanocomposites could emit bright photoluminescence. These nanocomposites have notably up conversion fluorescence properties. Dynamic mechanic alanalysis (DMA) reveals these nanocomposites also have excellent mechanical properties..

Keywords

Nanocomposites Polyurethane Silica CdTe, QD, TEM, Dynamic light scattering.

Citation

XIAOSAN ZHOU, ZHAOQI PAN, YUN GAO, A facile synthesis of waterborne polyurethane/silica/CdTe-QDs nanocomposites with excellent mechanical, thermal and optical properties, Optoelectronics and Advanced Materials - Rapid Communications, 5, 3, March 2011, pp.281-286 (2011).

Submitted at: Feb. 28, 2011

Accepted at: March 16, 2011