FLUORESCENT MICROSPHERES, THEIR PREPARING-METHOD AND USES

摘要

Microspheres comprising the following structure and their uses as tracers and fluorescent-calibration products are disclosed. wherein groups A, B, C are linked to hydrocarbon-chain??, and at least one of A, B, C has the structure of -N=R-, in which R is residue of reacted aldehydes crosslinking-agent, the other are -NH₂. Microspheres comprising said structure have obvious phenomenon of "self-fluorescence", and the fluorescent output of each microsphere in the present invention is significantly higher than that of the microspheres encapsulated by fluorescents, the microspheres have toleration to light-bleach and other surrounding's dependency without modifying the surface property of the microspheres. The preparing-method of said microspheres is also disclosed, in which the color of fluorescent microspheres can be adjusted by selecting different aldehydes or combinations thereof, the fluorescent strength can be controlled not only by the amount of crosslinking-agents and the time of crosslinking reaction, but also by adjusting the particle size of the microspheres.