Preparation method of polymer-rare earth ion luminous micelles

Abstract

The invention belongs to the technical field of polymer-metal functional composite material preparation, and relates to a preparation method of polymer-rare earth ion luminous micelles. An amphipathy two-block AB type copolymer or a three-block ABA type copolymer is selected to serve as a first ligand, and molecular weight of each block and total molecular weight of a segmented copolymer are respectively determined through a testing method of nuclear magnetic resonance spectra and a gel permeation chromatography; oxide of rare earth element is contained in a beaker, excessive hydrochloric acid is added for stirring until the oxide is completely dissolved; then the beaker is placed in a water bath until liquid in the beaker is dried to obtain trivalent rare earth chloride crystals; and a polymer solution and a rare earth ion solution are mixed in proportion, organic conjugation micromolecules are added to serve as a second ligand, the polymer solution, the rare earth ion solution and the organic conjugation micromolecules are evenly mixed to be placed in a reaction vessel, and condensation backflow is carried out at a constant temperature to enable the copolymer and rare earth ions to conduct a complexing reaction to obtain the polymer-rare earth ion luminous micelles. The preparation method is simple in process, reliable in principle, strong in operability and stable in product structure.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of polymer-metal functional composite materials, and relates to a preparation method of polymer-rare earth ion luminescent micelles, which involves reacting rare earth ions with block copolymers and crosslinking block copolymers with rare earth ions. The polar segment of the polymer to prepare polymer-rare earth functional composites with specific morphology and properties. Background technique: [0002] Due to their special electronic structure, rare earth elements have excellent optical, electrical, magnetic and catalytic properties, and have increasingly important applications in many fields such as large-screen display, mechanical metallurgy and petrochemical industry. my country is a country with a large amount of rare earth resources, and the reserves and output of rare earth resources rank among the top in the world. However, due to the serious lack of protection of rare earth resource...

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Problems solved by technology

However, because the complexing groups are evenly distributed on the entire polymer molecular chain, the resulting polymer-rare earth complex product is agglomerated, does not melt when heated, and is also insoluble in solvents, so it cannot be processed.

Jin Lan et al. (Acta Chem. Sinica, (2006) 64:357-362), and Li Zhaoye et al. (Colloid and Polymer Science (2010) 288:1041-1046) introduced a dihydrophilic block polymer (DHBC) with rare earth Ion coordination reaction induces the formation of polymer micelles, but according to its published reports, this method is limited to alcohol solvent systems

To sum up, there are the following defects in the prior art: one is that the rare earth ions cannot be evenly dispersed in the polymer matrix, resulting in their local agglomeration, which is the main reason for the quenching of the rare earth ion concentration; the other is that the existing preparation method Most of them are carried out in water or alcohol solvents, and the intervention of water molecules and hydroxyl groups is an important inducement for the fluorescence quenching of polymer-rare earth composites; the third is that the polymer-rare earth composites obtained by the existing technology are very easy Due to the induced agglomeration of the polymer by rare earth ions, it settles out of the solvent, forming a solid precipitate, which does not melt when heated and cannot be re-dissolved in the solvent, and subsequent processing such as coating cannot be performed; the fourth is obtained through the existing technology The limited solubility of polymer-rare earth composites in organic solvents other than alcohols (such as N,N-dimethylformamide, tetrahydrofuran, etc.) restricts the molding and processing of materials, thus limiting the use of such composites in practical application

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