Preparation method of high-molecular nano-composite thin film containing rare earth

Abstract

The invention relates to a preparation method of high-molecular nano-composite thin film containing rare earth. The method comprises the steps that an anionic polyelectrolyte solution and a rare earth ion salt solution which are same in volume are mixed and stirred for 12 h to 24 h, and a negatively charged high-molecular rare earth compound nanoparticle solution is obtained; under the condition of 10 DEG C to 50 DEG C, a pretreated substrate is put into a cationic polyelectrolyte solution, standing and cleaning are conducted, the cleaned substrate is put into the negatively charged high-molecular rare earth compound nanoparticle solution, standing and cleaning are conducted, the above-mentioned steps are repeatedly conducted, and the high-molecular nano-composite thin film containing rare earth is obtained. The method is simple and easy to operate, and the obtained thin film has an excellent optical property and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of polymer nanocomposite materials, in particular to a preparation method of rare earth-containing polymer nanocomposite films. Background technique [0002] Rare earth elements (RareEarthElement) have optical, electrical, magnetic and other properties that other elements do not have due to the particularity of their atomic structure. In recent years, polymer rare earth compounds composed of rare earth elements and polymer materials have both the unique properties of rare earth and the characteristics of light weight, impact resistance and easy processing of polymers. They have been used in fluorescent materials, optical devices, catalysis, etc. Show broad application prospects. The preparation methods of polymer rare earth compounds can generally be roughly divided into two types. One is that rare earth compounds are uniformly dispersed into monomers or polymers as dopants to make rare earth polymers ...

AI Technical Summary

Problems solved by technology

The preparation methods of polymer rare earth compounds can generally be roughly divided into two types. One is that rare earth compounds are uniformly dispersed into monomers or polymers as dopants to make rare earth polymers that exist in a doped manner, which is called It is a doped rare-earth polymer; the doping method is simple, widely adaptable and practical, but it is a physical mixing method with many limitations: most rare-earth compounds have low affinity with resins, and high-concentration doping It is difficult to uniformly disperse the rare earth compound in the polymer matrix, and phase separation is easy to occur, the transparency of the material is deteriorated, and the strength is damaged.

Moreover, due to poor dispersion, it will also lead to quenching between fluorescent molecules, thereby reducing the fluorescence intensity and shortening the fluorescence lifetime, which ultimately limits its application range.

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