Journal Article10.1002/APP.28381
Preparation of phosphor coated with a polymer by emulsion polymerization and its application in low‐density polyethylene
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TL;DR: In this article, in situ emulsion polymerization was first used to prepare phosphor coated with poly(methyl methacrylate-co-butyl acrylate) [P(MMA-co)-BA] to improve water resistance.
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Abstract: The long-afterglow phosphor SrAl2O4 : Eu2+, Dy3+ is liable to hydrolyze in water with deterioration of its luminescent properties. In this study, in situ emulsion polymerization was first used to prepare phosphor coated with poly(methyl methacrylate-co-butyl acrylate) [P(MMA-co-BA)] to improve water resistance. Fourier transform infrared spectra suggested that the polymer attached to the phosphor by chemical bonding. Observation by scanning electron microscopy (SEM) showed that a polymer layer formed on the surface of the phosphor. The resistance to water of the phosphor coated with the polymer layer was much better than that of the uncoated phosphor because the transparent polymer layer could suppress its hydrolysis process. Low-density polyethylene (LDPE) plastics, doped with long-afterglow phosphors, were manufactured with an extrusion technique. Through coating with P(MMA-co-BA), the compatibility of phosphor with the LDPE matrix was improved, as determined by SEM. The luminous LDPE plastics blended with the phosphor coated with polymer showed long and strong phosphorescence with little loss of persistence phosphorescence compared to the uncoated phosphor. The LDPE plastics still retained their mechanical properties through doping with 3% (mass fraction) of the phosphors. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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Citations
Waterproof Alkyl Phosphate Coated Fluoride Phosphors for Optoelectronic Materials
TL;DR: A facile approach for coating red fluoride phosphors with a moisture-resistant alkyl phosphate layer with a thickness of 50-100 nm is reported, which exhibited a high water tolerance and retained approximately 87 % of their initial external quantum efficiency after aging under high-humidity and high-temperature conditions for one month.
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Moisture-Resistant Mn4+ -Doped Core-Shell-Structured Fluoride Red Phosphor Exhibiting High Luminous Efficacy for Warm White Light-Emitting Diodes.
Decai Huang,Haomiao Zhu,Zhonghua Deng,Qilin Zou,Hongyu Lu,Xiaodong Yi,Wang Guo,Can-Zhong Lu,Xueyuan Chen +8 more
TL;DR: A convenient reverse cation-exchange strategy is introduced for constructing a core-shell-structured K2 TiF6 :Mn4+ @K2TiF6 phosphor, and the findings could facilitate commercial application of this highly efficient narrow-band emission red phosphor.
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Hydrophobic Organic Skin as a Protective Shield for Moisture-Sensitive Phosphor-Based Optoelectronic Devices.
TL;DR: Unlike other phosphor coatings that suffer from initial efficiency loss, the OA-passivated K2SiF6:Mn4+ (KSF-OA) phosphor exhibited the unique property of stable emission efficiency.
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From streetlights to phosphors: A review on the visibility of roadway markings
Jason Nance,Taylor D. Sparks +1 more
TL;DR: In this article, an explanation of the science behind stabilization is set forth alongside several methods that show potential for mitigating hydrolysis in road marking paint, including the use of strontium aluminate and dysprosium ions.
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Study on the silica-polymer hybrid coated SrAl2O4:Eu2+, Dy3+ phosphor as a photoluminescence pigment in a waterborne UV acrylic coating
TL;DR: In this paper, the preparation of SAOED phosphors with SiO2 and poly (methyl methacrylate-co-butyl acrylate) [P(MMA-BA)] was reported.
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References
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TL;DR: A green emitting phosphor with very bright and long lasting phosphorescence has been newly developed in this article, where the incorporation of ion into the system as an auxiliary activator dominates the phosphorescence, thermoluminescence and photoconductivity characteristics of the phosphor to a large extent.
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Mechanism of long phosphorescence of SrAl2O4:Eu2+, Dy3+ and CaAl2O4:Eu2+, Nd3+
TL;DR: In this paper, it was shown that the Eu 2+ centers are supplied by holes thermally released from the trap levels formed by Dy 3+ or Nd 3+, which has the optimum trap depth.
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Optical and Electrical Properties of SrAl2 O 4 : Eu2 +
TL;DR: In this article, a mechanism is proposed which assigns the delayed luminescence to a process involving the conduction of charged particles and evidence is presented which indicates that holes are trapped at lattice defects and the Eu2+ emission is associated with thermal deactivation of these traps.
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Preparation of poly (styrene–methyl methacrylate)/SiO2 composite nanoparticles via emulsion polymerization. An investigation into the compatiblization
TL;DR: In this article, a latex containing nanostructure hybrid of copolymer (styrene, methyl methacrylate, acrylic acid) and inorganic nanoparticles (silica) with core/shell structure was prepared via semi-batch emulsion polymerization.
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