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Electrospinning Preparation and Photoluminescence Properties of Rare Earth Composite Fibers

Author: ZhouLe
Tutor: WangZuo；YuHongQuan
School: Dalian Jiaotong University
Course: Environmental Science
Keywords: Electrospinning Lanthanide complexes - polymer composite fibers Luminescence properties
CLC: TQ340.1
Type: Master's thesis
Year: 2010
Downloads: 89
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Abstract


Rare Earth Organic Complex has a high luminous intensity , the luminous long life , linear spectrum presents a sharp band features a wide range of applications in the technology sector , such as : biochemistry and analytical chemistry can be used as biological probes , biomarkers , the organic electroluminescent light emitting devices function in areas such as light-emitting layer , in a highly sensitive time -resolved fluorescence immunoassay and explore the life structure of the genetic material is also an important value . Although the organic complexes of rare earth having a good light-emitting properties , but poor thermal and mechanical stability , processability poor handling properties , thus limiting its practical applications . The rare earth organic complex with the polymer composite , on the one hand to provide a stable chemical environment of rare earth ions , to improve the luminescence properties of rare earth complexes ; the other hand , the polymer -functionalized , luminescent properties of rare earth ions and polymer excellent mechanical properties of the organic combination of preparation with a light-emitting properties of rare earth complexes polymer composite light-emitting materials . This paper - polymer composite materials for the study of rare earth complexes . Soap-free emulsion method , ultrasonic method and electrospinning combined preparation of rare earth complexes - polymer composite light-emitting fiber . Basic characterization by scanning electron microscopy ( SEM ) , Fourier transform infrared ( FT - IR) spectroscopy , X - ray electron diffraction (XRD) spectroscopy , and fluorescence spectroscopy (FS) means to explore the preparation conditions on the fiber morphology, structure and luminescence properties the effect of and optimize the preparation conditions, to obtain high color purity , luminous intensity and the fluorescence lifetime of a long product . The main results obtained are as follows : were prepared using precipitation method and ultrasonic method the lanthanide complexes electrospinning required , change the pH value of the preparation process , factors such as ultrasonic power , were prepared the different nano unit ( nanospheres , nanorods ) rare earth complexes, and their luminescent properties have obvious changes ; ultrasonic Induced emulsion polymerization of rare earth complexes embedded in a polymer matrix to form a core-shell structure , prevent external quenching of the the surface luminescence centers of rare earth complexes role is expected to be applied to the moist environment , underwater environment or marine environment ; change various parameters, in an electrostatic spinning process to prepare a diameter size , luminescence intensity, fluorescence lifetime significantly different lanthanide complexes - polymer composite fibers .

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CLC: > Industrial Technology > Chemical Industry > The chemical fiber industry > General issues > Basic theory
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