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Luminescence of EPDM rubber ultrafine fibers containing nanodispersed Eu-complexes

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【Author】 LIU Li 1,2 , WANG Cheng 2 , ZHANG Fazhong 2 , ZHANG Liqun 2 , WEN Shipeng 2 (1. State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

【机构】 State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology； Key Laboratory of Carbon Fiber and Functional Polymer, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology；

【摘要】 Polyvinylpyrrolidone/ethylene-propylene-diene terpolymer (PVP/EPDM) sheath/core fibers, with the incorporation of Eu(TTA) 3 Phen (TTA=2-thenoyltrifluoroacetone, Phen=1,10-phenanthroline) complex (Eu-complex) in EPDM, were prepared by coaxial electrospinning. The composite fibers were further vulcanized by peroxide. Scanning electron microscopy (SEM) observations showed that the composite fibers had an average diameter of about 200 nm and a smooth surface. The dispersion of Eu-complexes in the fibers was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The studies revealed that the Eu-complex was dispersed in the EPDM fibers in the form of molecular clusters and/or nanoparticles with a diameter smaller than 10 nm. Fluorescence spectra and Judd-Ofelt parameters analysis showed that the luminescent quantum efficiency of the composite fibers was greatly improved when the Eu-complex content was 15 wt.%, because the fine dispersion of Eu-complex in EPDM facilitated the increase of radiative transition rate of the composite fibers over that of the neat complex powder.更多还原

【Abstract】 Polyvinylpyrrolidone/ethylene-propylene-diene terpolymer (PVP/EPDM) sheath/core fibers, with the incorporation of Eu(TTA) 3 Phen (TTA=2-thenoyltrifluoroacetone, Phen=1,10-phenanthroline) complex (Eu-complex) in EPDM, were prepared by coaxial electrospinning. The composite fibers were further vulcanized by peroxide. Scanning electron microscopy (SEM) observations showed that the composite fibers had an average diameter of about 200 nm and a smooth surface. The dispersion of Eu-complexes in the fibers was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The studies revealed that the Eu-complex was dispersed in the EPDM fibers in the form of molecular clusters and/or nanoparticles with a diameter smaller than 10 nm. Fluorescence spectra and Judd-Ofelt parameters analysis showed that the luminescent quantum efficiency of the composite fibers was greatly improved when the Eu-complex content was 15 wt.%, because the fine dispersion of Eu-complex in EPDM facilitated the increase of radiative transition rate of the composite fibers over that of the neat complex powder.更多还原

【关键词】 europium； EPDM； fibers； luminescence； coaxial electrospinning； rare earths；
【Key words】 europium； EPDM； fibers； luminescence； coaxial electrospinning； rare earths；

【基金】 Project supported by the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT, IRT0807);National Natural Science Foundation of China (51073008, 51103005);the Fundamental Research Funds for the Central Universities in China (ZY1103)

【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2012年09期

【分类号】TB383.1
【被引频次】6
【下载频次】46

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