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Study On The Effect Of Oxygen Anthracene Derivatives On Rare Earth Luminous Fibers Spectral Redshift

Posted on:2015-02-05Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y N ZhuFull Text:PDF
GTID:1221330467961925Subject:Textile Engineering
Abstract/Summary:PDF Full Text Request
Rare earth luminous fiber is a new emitting functional material, which was prepared bymeans of melt spinning, doping with luminescent material fiber-forming polymer and a colorpigment. It has been widely used in live entertainment due to the high luminous efficiency,long afterglow time, chemical stability, and non-radioactive, humans and theenvironment-harmless, and it had been widely used in aviation and aerospace field.Rare earth luminous fiber light-emitting process is mainly absorbed-store energy-energy released, that is, when the excitation light incident on the surface of the fiber, then thefibers absorb light and the outer layer of the rare earth ion electrons transit to the excitedstates in which the light-energy can be stored. After the excitation source being removed, theelectrons transit to the ground states and the absorption of light energy is released in the formof light, producing an emitting light. For that colored pigments is added in the spinningprocess, luminous fiber light will show the rich and various colors. But when the excitationlight is removed, the emitting light color of the fibers depends on mainly the performance ofthe luminescent material used in it. Currently, the luminous materials used in the luminousfiber is mainly SrAl2O4:Eu2+,Dy3+, and SrAl2O4system prevalent luminous colorlight-emitting materials monotonous shortcomings mainly in the emission spectrum of520nm (yellow-green), and as its luminous products produced mostly in the dark only can emityellow-green light. The performance of red luminescent materials is poor, and can’t meet therequirement of its practical application, which become a bottleneck in the development of thered luminescent fiber. Therefore, be able to explore the rare earth strontium aluminateluminescent fiber and optical emission spectroscopy method for color redshift has importantscientific significance and practical value. Aiming at this problem, we make redshift luminousfiber emission spectra by adding oxygen anthracene derivatives, and fiber spectral red shiftmechanism was studied.The research work and results have been summarized in the following aspects:(1) Rare earth strontium aluminate luminescent material samples were prepared bymethod of solid-state, and rare earth luminescent fibers were prepared by melt spinning, thelight-emitting properties of luminous fibers were investigated systematically by fluorescencespectrophotometer, colorimeter spectral scanning instruments and the reason on its emissionspectra redshift were studied. The results showed that: oxygen anthracene derivatives canmake the rare earth strontium aluminate move to the red light emission direction, indicatingthat the Oxygen anthracene derivativess can effectively make luminous fiber emission spectraand light color redshift.(2) Several rare earth luminous fiber samples were prepared by adding oxygenanthracene derivatives, and the impact of oxygen anthracene derivatives on spectral redshiftof luminous fiber was studied. It is concluded that: oxygen anthracene derivatives added doesnot damage the phase structure of SrAl2O4:Eu2+, Dy3+luminescent materials andfiber-forming polymer, ensuring SrAl2O4:Eu2+, Dy3+luminescence properties inside the fiber;And we further analyze the impact of oxygen anthracene derivativess for luminous fiber emission spectra and light color performance, which provides a theoretical support. At the end,the effects of oxygen anthracene derivatives on emission spectra and luminous fiber lightcolor redshift were clarified.(3) SrAl2O4: Eu2+, Dy3+emission spectra and excitation spectra of oxygen anthracenederivativess have a good overlap. Thus, inside the luminous fiber, SrAl2O4: Eu2+, Dy3+luminescent material with a single co-doped oxygen anthracene derivatives case, in theluminous fibers, it existed energy transfer from SrAl2O4: Eu2+, Dy3+to the oxygen anthracenederivatives. Formation: Light (SrAl2O4: Eu2+, Dy3+emission light)â†'oxygen anthracenederivativess (self-absorption)â†'emit light continuous process, ongoing SrAl2O4: Eu2+, Dy3+to oxygen anthracene derivativess and oxygen anthracene derivativesâ†'oxygen anthracenederivativess transfer process.(4) Luminous fiber light color coordinates has been calculated by the theoretical colorcoordinate equation. The luminous fiber test values were in orange color-red light districtwith oxygen anthracene derivative A, and the light color coordinates obtained by theoreticalcalculations were also located in orange-red light area. The actual test results and thetheoretical calculations of luminous fiber are consistent, which indicates that the theoreticalparameters can be used as a theoretical formula luminous fiber light color parameters.(5) The reliability and stability of the fiber application are studied. It is indicated that:Emission spectral curve of the luminous fiber has good repeatable measurements anddurability, heat resistance and summer light resistance, washable, acid and alkali resistance.High acid material erosion or prolonged soaking stains, light exposure can cause varyingdegrees of fiber material to reduce the emission intensity. Thus, in the process of usingluminous fibers we must avoid light exposure environments and prolonged contact with theacid and other substances.
Keywords/Search Tags:Rare earth luminous material, luminous fiber, oxygen anthracene derivatives, light color coordinates, spectra redshift
PDF Full Text Request
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