Study of Organic Modification for SrAl2O4:Eu2+, Dy3+ Phosphors

Xing Dong Lü; Xiao Hua Liu; Guo Sheng Gai

doi:10.4028/www.scientific.net/AMR.58.169

Paper Titles

Production Status of Nano-Sized Powder Materials in China
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Research on Potential Control Flotation of Molybdenite
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Research on the Mechanism of the Dissociation of Potassium Shale during Roasting
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Surface Encapsulation of Nano-CaCO₃ Particle by In Situ Emulsion Polymerization
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Study of Organic Modification for SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors
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Study on Size Distribution of Oolitic Hematite
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Surface Coating of TiO₂ Powder
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Surface Modification of Basic Magnesium Sulfate Whiskers
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Surface Modification of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors Using Silica Encapsulation
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 58Study of Organic Modification for SrAl2O4:Eu2+,...

Study of Organic Modification for SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors

Abstract:

Methylaminopropyltrimethoxysilane (MAPS) coupling agent was used to pre-modify SrAl2O4:Eu2+, Dy3+ phosphors, and then graft methylmethacrylate (MMA) on SrAl2O4:Eu2+, Dy3+ phosphors. IR, SEM and TEM measurements showed that there is an organic encapsulation film composed of silane modified poly(methylmethacrylate) (PMMA) on phosphor surface. This organic film encapsulated on phosphor surface like dense reticulation with a thickness of 20-30 nm. The water resistance and oil absorption measurements and persistent luminescent properties showed that after being encapsulated, SrAl2O4:Eu2+, Dy3+ phosphors has much better water resistance and lower oil absorption with little loss of persistent phosphorescence. The emission intensity and afterglow lifetime of the encapsulated phosphors were reduced to 93% and 95% of the originals, respectively.