Study On Preparation And Properties Of Polymer/rare Earth Composite Luminescent Materials

A long-lag phosphor materials is a type of photoluminescence materials, which can absorb sun light, or lamplight. After light source is stopped, long -lag phosphor materials will release the light energy that is absorbed before. Among the long-lag phosphor materials, aluminates are always researched and have many advantages, for example, high brightness, long time of persistence, no radiation and so on. In the air, in the course of application, however, aluminates will gradually loss the brightness, even cannot lighten any more. The main reason is that aluminates hydrolyse when water exists. Polymer materials, which are a type of extensive used materials, of course, have many advantages: wide area of source, good resistance to water and easy to contour machining. Because polymer/rare-earth composite luminescence materials combine the luminescence of rare-earth materials with the merits of polymer materials, it will have widespread applications.In this thesis, MMA and styrene are the main monomers of the reaction. In-situ emulsion polymerization is employed to coat the surface of aluminates, which is a kind of long-lag phosphor materials. We prepare several different types of polymer/rare-earth composite luminescence materials. Consequently, the resistance of aluminates to water increases greatly and its service life is prolonged.In this thesis, in-situ emulsion polymerization is employed to prepare...