Method for preparing fluorescent polymer rare earth complex nano-microsphere

Abstract

The invention provides a method for preparing a fluorescent polymer rare earth complex nano-microsphere. The method comprises the steps: allowing a monomer I to be subjected to miniemulsion polymerization to obtain a polymer seed microsphere emulsion I; adding a monomer II to the polymer seed microsphere emulsion I to be subjected to seed emulsion polymerization to obtain a core-shell nano-microsphere emulsion II; extracting core-shell nano-microspheres by high-speed centrifugation or freeze-drying of the core-shell nano-microsphere emulsion II to be dispersed in an organic solvent, and then adding a rare earth compound and a small molecule ligand to be subjected to a coordination reaction to obtain the solvent-resistant fluorescent polymer rare earth complex nano-microsphere. The prepared nano-microsphere has a uniform size, the preparation method is simple and practicable, high-intensity fluorescent lights of different colors can be obtained by adding different rare earth compounds, the environmental stability is particularly excellent, and the nano-microsphere still can be used after being stored for a year, can be stably dispersed in various organic solvents, and has good development prospects.

Description

technical field [0001] The invention relates to a polymer nanometer microsphere, the field of rare earth, and the field of fluorescence light emission, and more particularly relates to a preparation method of a solvent-resistant nanoscale fluorescent polymer rare earth complex microsphere. Background technique [0002] As a cutting-edge technology, the preparation technology of polymer nanospheres has always attracted the attention of the academic circle. Its specific excellent performance is reflected in its small size, surface and quantum size effects. In addition, it can also be used as a matrix material to compound inorganic elements to prepare composite microspheres. This composite material can not only effectively retain the excellent properties of polymers, but also bring new functionality through the introduction of inorganic materials. In this regard, rare earth elements and polymer composite microspheres are particularly promising research areas. However, the prep...

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Problems solved by technology

However, the preparation of nano-rare earth complexes by existing methods usually requires complex chemical modification or simple embedding methods. The former leads to cumbersome preparation process, time-consuming and labor-intensive, and is not suitable for industrialization, while the latter means of doping. Irregular shape and size lead to poor storage stability

In addition, it should be noted that the stability of rare earth polymer nanoparticles prepared by traditional methods in organic solvents is extremely poor, especially if the polymer is in a good solvent with extremely similar solubility parameters, it will also collapse, which directly leads to product failure

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