Strontium aluminate/polymer composites: Morphology, luminescent properties, and durability

Abstract

Phosphor-based polymer composites were prepared using a melt mixing and extrusion method. Morphology, luminescent properties, and Hamburg wheel test (HWT) of synthesized hybrid material were studied using various polymer matrices. The intensities of the luminescence of the strontium aluminates phosphors (SrAl 2 O 4 : Eu,Dy and Sr 4 Al 14 O 25 : Eu,Dy) were substantially changed when incorporated into structurally and chemically different organic matrices. HWTs were performed to evaluate the durability of the polymers against simulated wheel loads and the effect of these wheel loads on the luminosity of the polymers. The decay slopes of various polymer-phosphor composites suggests that the simulated wheel load of the Hamburg test did not have a profound effect on the luminosity as such but the duration of luminescence was found to be shorter for the polymer-phosphor hybrid after the Hamburg test.

Ethyl vinyl acetate copolymer—SrAl2O4:Eu,Dy and Sr4Al14O25:Eu,Dy phosphor‐based composites: Preparation and material properties

“…These areas are receiving attention internationally to improve the capacities of phosphors by developing composite materials using different methods 25–29. Previous tests were done on the phosphorescent behavior and material properties of low‐density polyethylene (LDPE) (MFI 7 g/10 min, density 0.918 g/cm −3 , 106°C), linear low‐density polyethylene (LLDPE) (MFI 1 g/10 min, density 0.924 g/cm −3 , melting point 124°C), high‐density polyethylene (HDPE) (density 0.95 g/cm −3 , melting point 130°C), and polypropylene (PP) (MFI 12 g/10 min, density 0.9 g/cm −3 , melting point 160°C), supplied by Sasol polymers 30. The phosphorescence intensities of the polymer‐phosphor composites were found to be lower than that of the pure phosphors.…”

Developments in Eu+2‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

“…The SiO 2 , 43 Al 2 O 3 , 44 SrF 2 , 45 boron nitride (BN) 46 compounds, phosphoric acid (H 3 PO 4 ) 47 organic ligands, 48,49 and an inorganic layer 47 have been used for phos-phor encapsulation. 52 Mishra et al prepared ethyl vinyl acetate (EVA)/SrAl 2 O 4 : Eu,Dy and Sr 4 Al 14 O 25 :Eu,Dy composites by melt-mixing and extrusion method. The incorporation of luminescent materials into water-resistant polymer matrices is the economical way to get stable phosphors.…”

Effect of polymer matrix on the spectral characteristics of spectrum-fingerprint anti-counterfeiting fiber

“…Therefore, it is highly necessary to undertake further research on this study. To the best of our knowledge, over the last years there have been many literatures on the rare-earth luminescent materials (Chen, Wang, Hu, Hu, & Liu, 2008;Haranath, Shanker, Chander, & Sharma, 2009;Luan, Guo, & Huang, 2009;Lü, Shu, Qin, Yu, & Xiong, 2007;Zhang, Xu, Shen, & Tian, 2005;Zhu, Zheng, Zeng, Xiao, & Liu, 2009), but only a few are related to literatures on the luminescence properties of polymer/rareearth luminescent material composites (Hamza, Fouda, Kabeel, & Shabana, 1989;Mishra et al, 2009;Zhong, Dong, Jiang, He, & Miao, 2006), mainly focusing on the intensity and duration of luminescence. Zhong et al (2006) investigated the effect of organic solvent and resin on luminescent capability of SrAl204: Eu2+, Dy3+ phosphor.…”

“…Zhong et al (2006) investigated the effect of organic solvent and resin on luminescent capability of SrAl204: Eu2+, Dy3+ phosphor. Mishra et al (2009) studied the luminescence properties of strontium aluminate/polymer films. These literatures give us great help to our work.…”